Friction Spinning
•Download as PPTX, PDF•
4 likes•1,300 views
Friction spinning is a type of spinning that uses friction to manufacture yarn. It is also known as DREF spinning. In DREF spinning, fibers are delivered to a rotating drum where they are stacked into a fiber bundle. The bundle wraps around itself between two surfaces moving in opposite directions, which generates twists in the fibers to form yarn. Due to the separate yarn winding and twist insertion methods used, DREF spinning can achieve high production rates of up to 300 meters per minute. It is useful for producing yarns from diverse fibers like short fibers at low costs.
Report
Share
Report
Share
Recommended
Friction spinning System
# Friction Spinnig #
Created By
Abdullah Al Parvez ,
9th batch , Department of Yarn Manufacturing ,
Chittagong Textile Engineering College ,Bangladesh
Multiphase, a new concept of weaving
This document discusses different types of weaving machines, including multiphase weaving machines. It describes wave shed and parallel shed multiphase looms. Wave shed looms have shuttles that travel in straight or circular paths, while parallel shed looms form successive parallel sheds across the warp. The fastest weaving machine is the Sulzer M8300 multiphase loom, which can produce up to 1500 meters of fabric per day at a production cost 25-30% lower than single phase looms.
Carding note
1. Carding is the process of reducing tufts of entangled fibers into a filmy web of individual fibers using machines called cards. There are three main types of cards used for cotton, wool, and man-made fibers.
2. The carding process opens fibers, removes impurities, disentangles neps, blends fibers, orients fibers, and forms slivers for further processing. It transforms a fiber batt into a uniform web of individual fibers.
3. Fiber batts are fed to the carding machine using either a lap feed system or a flock feed system. The chute feed system aims to feed a fiber sheet of uniform packing density and linear density.
Rapier weaving
Rapier weaving is a shuttleless weaving technique where rigid or flexible rapiers carry the weft yarn through the shed. There are single and double rapier systems, with double being more common. In double systems, one rapier (giver) brings the yarn to the center and transfers it to the other rapier (taker) to carry to the other side. Dewas and Gabler systems differ in how the transfer occurs. Rapier machines are versatile and efficient with minimal stress on the weft yarn, resulting in high quality fabrics and low yarn breakage. Factors like machine speed, yarn properties, and shed formation affect yarn stresses.
Rapier Loom
This document discusses the rapier loom and rapier weaving. It begins by defining a rapier loom as one that uses a rapier to pull the weft yarn across the loom. It can use a single or double rapier system. It then describes the key components and functioning of single and double rigid and flexible rapier systems. It also discusses different weft insertion principles like Dewas and Gabler systems as well as rapier drives, features of modern rapier looms, selvedge formation, weft insertion rates, and equations for calculating weaving production rates.
Single jersey Knitting Machine
This document provides information about the single jersey knitting machine used in the Fabric Manufacturing Technology Lab. It describes the key parts of the machine including the latch needles, cams, sinkers, cylinder, creel, and yarn path. It also provides specifications for the cylinder such as a diameter of 15 inches and gauge of 25. The machine produces plain knitted fabrics and the document aims to provide an understanding of how a single jersey machine functions.
Rotor spinning
This document summarizes the key differences between ring spinning and rotor spinning systems. Rotor spinning is a more recent open-end spinning method that introduces twist without requiring package rotation. It has higher productivity and handles larger packages than ring spinning. While rotor yarn is weaker, it has better evenness and abrasion resistance. The document provides details on the rotor spinning process and machine parts and compares performance characteristics of ring and rotor yarns.
Yarn manufacturing Process : Carding
The document discusses the carding process which involves opening, cleaning and assembling fibers into a sliver through different sections of a carding machine like feed, licker-in, cylinder and doffer. It explains the objectives, necessities and zones of carding along with details of components like types of clothing, their functioning and settings that are important for quality carding. The document also covers developments in carding technology and types of drives used in modern carding machines.
Recommended
Friction spinning System
# Friction Spinnig #
Created By
Abdullah Al Parvez ,
9th batch , Department of Yarn Manufacturing ,
Chittagong Textile Engineering College ,Bangladesh
Multiphase, a new concept of weaving
This document discusses different types of weaving machines, including multiphase weaving machines. It describes wave shed and parallel shed multiphase looms. Wave shed looms have shuttles that travel in straight or circular paths, while parallel shed looms form successive parallel sheds across the warp. The fastest weaving machine is the Sulzer M8300 multiphase loom, which can produce up to 1500 meters of fabric per day at a production cost 25-30% lower than single phase looms.
Carding note
1. Carding is the process of reducing tufts of entangled fibers into a filmy web of individual fibers using machines called cards. There are three main types of cards used for cotton, wool, and man-made fibers.
2. The carding process opens fibers, removes impurities, disentangles neps, blends fibers, orients fibers, and forms slivers for further processing. It transforms a fiber batt into a uniform web of individual fibers.
3. Fiber batts are fed to the carding machine using either a lap feed system or a flock feed system. The chute feed system aims to feed a fiber sheet of uniform packing density and linear density.
Rapier weaving
Rapier weaving is a shuttleless weaving technique where rigid or flexible rapiers carry the weft yarn through the shed. There are single and double rapier systems, with double being more common. In double systems, one rapier (giver) brings the yarn to the center and transfers it to the other rapier (taker) to carry to the other side. Dewas and Gabler systems differ in how the transfer occurs. Rapier machines are versatile and efficient with minimal stress on the weft yarn, resulting in high quality fabrics and low yarn breakage. Factors like machine speed, yarn properties, and shed formation affect yarn stresses.
Rapier Loom
This document discusses the rapier loom and rapier weaving. It begins by defining a rapier loom as one that uses a rapier to pull the weft yarn across the loom. It can use a single or double rapier system. It then describes the key components and functioning of single and double rigid and flexible rapier systems. It also discusses different weft insertion principles like Dewas and Gabler systems as well as rapier drives, features of modern rapier looms, selvedge formation, weft insertion rates, and equations for calculating weaving production rates.
Single jersey Knitting Machine
This document provides information about the single jersey knitting machine used in the Fabric Manufacturing Technology Lab. It describes the key parts of the machine including the latch needles, cams, sinkers, cylinder, creel, and yarn path. It also provides specifications for the cylinder such as a diameter of 15 inches and gauge of 25. The machine produces plain knitted fabrics and the document aims to provide an understanding of how a single jersey machine functions.
Rotor spinning
This document summarizes the key differences between ring spinning and rotor spinning systems. Rotor spinning is a more recent open-end spinning method that introduces twist without requiring package rotation. It has higher productivity and handles larger packages than ring spinning. While rotor yarn is weaker, it has better evenness and abrasion resistance. The document provides details on the rotor spinning process and machine parts and compares performance characteristics of ring and rotor yarns.
Yarn manufacturing Process : Carding
The document discusses the carding process which involves opening, cleaning and assembling fibers into a sliver through different sections of a carding machine like feed, licker-in, cylinder and doffer. It explains the objectives, necessities and zones of carding along with details of components like types of clothing, their functioning and settings that are important for quality carding. The document also covers developments in carding technology and types of drives used in modern carding machines.
Yarn Hairiness
Hairiness is characterized by the quantity of freely moving fibre ends or fibre loops projecting from a yarn or textile fabric (woven, knitted or non woven fabrics).
In term of measurement Hairiness corresponds to the total length of the protruding fibres in unit length of one centimeter.
Machine parameter of speed frame
The document discusses the key components and processes of a speed frame machine. It describes the functions of creeling, drafting, twisting, building, and winding processes to attenuate sliver and produce roving. The drafting system and its roller configuration is explained. Common issues like irregular roving, breakages, and machine faults are also summarized.
Warp stop motion
This document discusses warp stop motion, which is a mechanism that stops the loom immediately when a warp thread breaks during weaving. There are two main types: mechanical and electrical. The mechanical type uses drop wires and reciprocating bars to obstruct loom movement if a thread breaks. The electrical type uses drop wires to complete or break an electrical circuit, activating a solenoid that stops the loom. Both aim to prevent faults from occurring in the fabric if a thread breaks by halting the loom quickly.
Crepe weave
This document discusses different methods for constructing crepe and satin weaves. It describes four methods for making crepe weaves: using a crepe weave or yarn on a sateen base; combining a floating weave with plain threads; reversing a small motif at intervals; and inserting one weave over another to produce an irregular effect. It also provides guidelines for determining the move number in satin weaves based on the satin number.
Picking Mechanism | Beat Up Mechanism | Over Picking Under Picking Mechanism
The document discusses weaving technology and describes different mechanisms involved. It focuses on picking and beat-up mechanisms. Picking inserts the weft thread through the warp shed and can be bidirectional or unidirectional. Beat-up drives the inserted weft to the fell of the cloth. There are different types of picking (over, under) and beat-up (single, double, cam) mechanisms that are suited to different fabric weights and loom styles. Faults like early/late picking and factors influencing beat-up force are also covered.
CONTROL OF BLOW ROOM BY RIETER
The document discusses control systems for blowroom machines from Rieter. It summarizes the functions and characteristics of various machines in the blowroom process, including the bale opener, pre-cleaner, homogeneous mixer, storage and feeding machine, and card. It also describes the control systems for machines like the bale opener, which uses sensors and motors connected to a control device to determine position and coordinate movement longitudinally and vertically.
Spinning Systems
This document discusses different types of spinning systems used to process staple fibers into yarns. It describes the main types as ring spinning, compact spinning, open end spinning, and air jet spinning. For each type, it provides information on the typical yarn count ranges, fiber properties required, and basic processing steps. It also compares the production efficiency and quality differences between conventional and modern spinning systems. Finally, it discusses important factors to consider regarding fiber quality and its impact on yarn quality and production costs.
Pilling and abrasion Testing of fabrics
This document discusses testing methods for pilling and abrasion resistance of fabrics. It describes that pilling is the formation of small balls of entangled fibers on fabric surfaces due to rubbing, and is influenced by fiber properties like strength and stiffness. Methods to measure pilling include objective counting/weighing of pills or subjective comparison to standards. Tests for pilling include the ICI pilling box method and Martindale abrasion tester. Abrasion resistance depends on fiber type, properties, yarn twist, and fabric structure, and is measured using the Martindale abrasion tester by recording cycles until thread breakage. Grading scales are used to assess levels of pilling and abrasion damage.
Abhi Rana)Dobby Shedding Mechanism
The document discusses limitations of cam shedding systems when weaving designs with high numbers of picks in the repeat. For a 10-pick repeat design, 10 cams would be required, rotating at 1/10 the speed of the crank shaft. This results in a small dwell period of 48 degrees for each pick. As the number of picks increases, the cam contour becomes steeper, reducing the effective force on the follower and requiring higher operating forces. One solution is increasing the cam diameter to reduce the steepness of the cam contour, but this increases power needs and space requirements.
Rapier loom
The document discusses the rapier loom, a type of shuttleless weaving loom. A rapier loom uses finger-like carriers called rapiers to pull the weft yarn across the loom between the warp yarns. There are two main types - single rigid rapier looms, which use one long rapier across the full width, and double rigid rapier looms, which use two rapiers entering from opposite sides to transfer the weft yarn. Rapier looms can operate at high speeds up to 1300 meters of weft per minute. They are flexible and can weave a wide range of fabrics from light to heavy weights.
Compact Spinning System
The compact spinning is a process where fiber strand drawn by drafting system is condensed before twisting it.Following methods are used by machine manufacturers to condense the fiber strand.
1. Aerodynamic condensing.
2. Mechanical condensing.
3. Magnetic condensing.
Compact spinning has a promising future because of the higher production and improved quality of compact yarns
Keighley Dobby (negative- double lift)
You can find the diffences between mechanical and electronical dobby mechanisms in principle in this presentation.
Also , you can reach the details of dobby mechanisms type like as of single , double and negative dobby systems.
Yarn Manufacturing Process : Drawframe
The document discusses the draw frame machine used in textile processing. It begins by outlining the objectives of studying the necessity, objectives, construction, and working of the draw frame. It then provides details on:
- The drawing process and how it elongates and levels slivers
- The objectives and functions of the draw frame machine
- The main sections of the draw frame including the creel, drafting, sliver condensing, and coiler sections
- Factors that influence drafting such as fiber properties, drafting arrangement design, and drafting conditions
- The behavior of fibers in the drafting zone and the role of fiber-fiber friction
- Types of irregularities that can occur during drafting
The
Needle Loop & Sinker Loop
Needle loop refers to the upper part of the knitted loop formed by the needle drawing yarn. There are three main types of needles used. Sinker loop refers to the lower part that connects two adjacent needle loops in the same course.
Sinker is a thin metal plate that assists with loop formation, holding loops down, and pushing fabric forward between needle movements. It plays an important role in restricting loop movement and supporting the fabric.
Needle loop and sinker loop are the two vital components that make up each stitch in knitting and understanding the difference between them is important for knitting technology.
Finishing
The document discusses textile finishing processes. It begins by introducing textiles and their basic components and materials. It then describes the major departments of textiles - spinning, weaving, and wet-processing. Wet-processing involves pretreatments like scouring and bleaching, dyeing and printing, and finishing treatments like calendaring to impart properties like softness and durability. Specific mechanical finishing processes are also outlined, including sueding, raising, shearing, and decating. Calendaring is discussed in detail as a process that smoothes fabrics and modifies properties.
Various tappet loom parts with function
The document defines and describes the key parts of a tappet loom. A tappet loom uses tappets, which are levers or projections moved by cams, to produce reciprocating motion that allows the loom to weave fabric. The main components of a tappet loom are the warp beam, heddles, shuttle, reed, tappets, and take-up roller. The tappets are connected to treadles and use cam motion to alternately lift the heddles, creating a shed for the shuttle to pass through and weave in the weft thread.
Yarn Geometry
This presentation discusses yarn geometry and various types of yarns. It defines textiles and yarn, and classifies yarns into continuous filament, staple, core spun, novelty, stretch, and high bulk yarns. It describes the properties, structures, and manufacturing processes of these different yarns. The presentation also covers yarn designation, ideal yarn properties, fiber packing in yarns, optimum twist factor, twist contraction, and the basic geometry of twisted yarns.
Study on Winding Process
Winding is one of the most important operation, which is mainly occurred in spinning section. Besides, it is also important in fabric manufacturing.
FABRIC STRUCTURE PART 3
THIS COVERS HONEY COMB, BRIGHTON HONEY COMB, HUCK A BACK, DISTORTED THREAD EFFECT AND OTHER WEAVES.. IT IS VERY MUCH USEFUL TO TEXTILE DIPLOMA AND DEGREE STUDENTS
Double lift and single cylinder
This document summarizes the double lift and single cylinder (DLSC) jacquard shedding system. It explains that in a DLSC jacquard, each yarn end is controlled by two hooks attached to a single needle, allowing the end to be lifted or lowered independently over two picks. It describes how two sets of knives move in opposite phases to control the two hooks and raise or lower each end. The DLSC jacquard produces a semi-open shed and allows the cylinder to turn only every other pick, unlike a single lift single cylinder jacquard.
Core yarn recomendations_and_control_points
This document provides recommendations and control points for a core yarn system. It outlines parameters that should be monitored such as yarn count range, draft range, and lycra Dtex. It describes proper steaming procedures if necessary and control points for lapping lycra on rollers, centering lycra, filament production year, humidity keeping, traveller speed and life cycle, blower position, front roller and lycra roller speeds, operator control points, lapping, and proper grounding. The recommendations are intended to ensure quality of the core yarn system.
Core yarn spinning
Filament-core yarns are produced to take advantage of both filament and staple fibre properties. They offer good strength and uniformity without sacrificing the staple fibre yarn-like surface characteristics. Core-spun yarns containing spandex provide fabric designers with broad possibilities, because such stretchable yarns can be constructed with a wide range of properties using virtually any type of hard fibres as the cover yarn. However, a disadvantage of the core yarns is that the staple fibre sheath may slip along the filament when being pulled to pass over or when being rubbed by machine parts during further mechanical processes. But it is very easy to produce core-spun yarn containing spandex in a conventional ring frame after doing some modification of the machine.
More Related Content
What's hot
Yarn Hairiness
Hairiness is characterized by the quantity of freely moving fibre ends or fibre loops projecting from a yarn or textile fabric (woven, knitted or non woven fabrics).
In term of measurement Hairiness corresponds to the total length of the protruding fibres in unit length of one centimeter.
Machine parameter of speed frame
The document discusses the key components and processes of a speed frame machine. It describes the functions of creeling, drafting, twisting, building, and winding processes to attenuate sliver and produce roving. The drafting system and its roller configuration is explained. Common issues like irregular roving, breakages, and machine faults are also summarized.
Warp stop motion
This document discusses warp stop motion, which is a mechanism that stops the loom immediately when a warp thread breaks during weaving. There are two main types: mechanical and electrical. The mechanical type uses drop wires and reciprocating bars to obstruct loom movement if a thread breaks. The electrical type uses drop wires to complete or break an electrical circuit, activating a solenoid that stops the loom. Both aim to prevent faults from occurring in the fabric if a thread breaks by halting the loom quickly.
Crepe weave
This document discusses different methods for constructing crepe and satin weaves. It describes four methods for making crepe weaves: using a crepe weave or yarn on a sateen base; combining a floating weave with plain threads; reversing a small motif at intervals; and inserting one weave over another to produce an irregular effect. It also provides guidelines for determining the move number in satin weaves based on the satin number.
Picking Mechanism | Beat Up Mechanism | Over Picking Under Picking Mechanism
The document discusses weaving technology and describes different mechanisms involved. It focuses on picking and beat-up mechanisms. Picking inserts the weft thread through the warp shed and can be bidirectional or unidirectional. Beat-up drives the inserted weft to the fell of the cloth. There are different types of picking (over, under) and beat-up (single, double, cam) mechanisms that are suited to different fabric weights and loom styles. Faults like early/late picking and factors influencing beat-up force are also covered.
CONTROL OF BLOW ROOM BY RIETER
The document discusses control systems for blowroom machines from Rieter. It summarizes the functions and characteristics of various machines in the blowroom process, including the bale opener, pre-cleaner, homogeneous mixer, storage and feeding machine, and card. It also describes the control systems for machines like the bale opener, which uses sensors and motors connected to a control device to determine position and coordinate movement longitudinally and vertically.
Spinning Systems
This document discusses different types of spinning systems used to process staple fibers into yarns. It describes the main types as ring spinning, compact spinning, open end spinning, and air jet spinning. For each type, it provides information on the typical yarn count ranges, fiber properties required, and basic processing steps. It also compares the production efficiency and quality differences between conventional and modern spinning systems. Finally, it discusses important factors to consider regarding fiber quality and its impact on yarn quality and production costs.
Pilling and abrasion Testing of fabrics
This document discusses testing methods for pilling and abrasion resistance of fabrics. It describes that pilling is the formation of small balls of entangled fibers on fabric surfaces due to rubbing, and is influenced by fiber properties like strength and stiffness. Methods to measure pilling include objective counting/weighing of pills or subjective comparison to standards. Tests for pilling include the ICI pilling box method and Martindale abrasion tester. Abrasion resistance depends on fiber type, properties, yarn twist, and fabric structure, and is measured using the Martindale abrasion tester by recording cycles until thread breakage. Grading scales are used to assess levels of pilling and abrasion damage.
Abhi Rana)Dobby Shedding Mechanism
The document discusses limitations of cam shedding systems when weaving designs with high numbers of picks in the repeat. For a 10-pick repeat design, 10 cams would be required, rotating at 1/10 the speed of the crank shaft. This results in a small dwell period of 48 degrees for each pick. As the number of picks increases, the cam contour becomes steeper, reducing the effective force on the follower and requiring higher operating forces. One solution is increasing the cam diameter to reduce the steepness of the cam contour, but this increases power needs and space requirements.
Rapier loom
The document discusses the rapier loom, a type of shuttleless weaving loom. A rapier loom uses finger-like carriers called rapiers to pull the weft yarn across the loom between the warp yarns. There are two main types - single rigid rapier looms, which use one long rapier across the full width, and double rigid rapier looms, which use two rapiers entering from opposite sides to transfer the weft yarn. Rapier looms can operate at high speeds up to 1300 meters of weft per minute. They are flexible and can weave a wide range of fabrics from light to heavy weights.
Compact Spinning System
The compact spinning is a process where fiber strand drawn by drafting system is condensed before twisting it.Following methods are used by machine manufacturers to condense the fiber strand.
1. Aerodynamic condensing.
2. Mechanical condensing.
3. Magnetic condensing.
Compact spinning has a promising future because of the higher production and improved quality of compact yarns
Keighley Dobby (negative- double lift)
You can find the diffences between mechanical and electronical dobby mechanisms in principle in this presentation.
Also , you can reach the details of dobby mechanisms type like as of single , double and negative dobby systems.
Yarn Manufacturing Process : Drawframe
The document discusses the draw frame machine used in textile processing. It begins by outlining the objectives of studying the necessity, objectives, construction, and working of the draw frame. It then provides details on:
- The drawing process and how it elongates and levels slivers
- The objectives and functions of the draw frame machine
- The main sections of the draw frame including the creel, drafting, sliver condensing, and coiler sections
- Factors that influence drafting such as fiber properties, drafting arrangement design, and drafting conditions
- The behavior of fibers in the drafting zone and the role of fiber-fiber friction
- Types of irregularities that can occur during drafting
The
Needle Loop & Sinker Loop
Needle loop refers to the upper part of the knitted loop formed by the needle drawing yarn. There are three main types of needles used. Sinker loop refers to the lower part that connects two adjacent needle loops in the same course.
Sinker is a thin metal plate that assists with loop formation, holding loops down, and pushing fabric forward between needle movements. It plays an important role in restricting loop movement and supporting the fabric.
Needle loop and sinker loop are the two vital components that make up each stitch in knitting and understanding the difference between them is important for knitting technology.
Finishing
The document discusses textile finishing processes. It begins by introducing textiles and their basic components and materials. It then describes the major departments of textiles - spinning, weaving, and wet-processing. Wet-processing involves pretreatments like scouring and bleaching, dyeing and printing, and finishing treatments like calendaring to impart properties like softness and durability. Specific mechanical finishing processes are also outlined, including sueding, raising, shearing, and decating. Calendaring is discussed in detail as a process that smoothes fabrics and modifies properties.
Various tappet loom parts with function
The document defines and describes the key parts of a tappet loom. A tappet loom uses tappets, which are levers or projections moved by cams, to produce reciprocating motion that allows the loom to weave fabric. The main components of a tappet loom are the warp beam, heddles, shuttle, reed, tappets, and take-up roller. The tappets are connected to treadles and use cam motion to alternately lift the heddles, creating a shed for the shuttle to pass through and weave in the weft thread.
Yarn Geometry
This presentation discusses yarn geometry and various types of yarns. It defines textiles and yarn, and classifies yarns into continuous filament, staple, core spun, novelty, stretch, and high bulk yarns. It describes the properties, structures, and manufacturing processes of these different yarns. The presentation also covers yarn designation, ideal yarn properties, fiber packing in yarns, optimum twist factor, twist contraction, and the basic geometry of twisted yarns.
Study on Winding Process
Winding is one of the most important operation, which is mainly occurred in spinning section. Besides, it is also important in fabric manufacturing.
FABRIC STRUCTURE PART 3
THIS COVERS HONEY COMB, BRIGHTON HONEY COMB, HUCK A BACK, DISTORTED THREAD EFFECT AND OTHER WEAVES.. IT IS VERY MUCH USEFUL TO TEXTILE DIPLOMA AND DEGREE STUDENTS
Double lift and single cylinder
This document summarizes the double lift and single cylinder (DLSC) jacquard shedding system. It explains that in a DLSC jacquard, each yarn end is controlled by two hooks attached to a single needle, allowing the end to be lifted or lowered independently over two picks. It describes how two sets of knives move in opposite phases to control the two hooks and raise or lower each end. The DLSC jacquard produces a semi-open shed and allows the cylinder to turn only every other pick, unlike a single lift single cylinder jacquard.
What's hot (20)
Picking Mechanism | Beat Up Mechanism | Over Picking Under Picking Mechanism
Picking Mechanism | Beat Up Mechanism | Over Picking Under Picking Mechanism
Viewers also liked
Core yarn recomendations_and_control_points
This document provides recommendations and control points for a core yarn system. It outlines parameters that should be monitored such as yarn count range, draft range, and lycra Dtex. It describes proper steaming procedures if necessary and control points for lapping lycra on rollers, centering lycra, filament production year, humidity keeping, traveller speed and life cycle, blower position, front roller and lycra roller speeds, operator control points, lapping, and proper grounding. The recommendations are intended to ensure quality of the core yarn system.
Core yarn spinning
Filament-core yarns are produced to take advantage of both filament and staple fibre properties. They offer good strength and uniformity without sacrificing the staple fibre yarn-like surface characteristics. Core-spun yarns containing spandex provide fabric designers with broad possibilities, because such stretchable yarns can be constructed with a wide range of properties using virtually any type of hard fibres as the cover yarn. However, a disadvantage of the core yarns is that the staple fibre sheath may slip along the filament when being pulled to pass over or when being rubbed by machine parts during further mechanical processes. But it is very easy to produce core-spun yarn containing spandex in a conventional ring frame after doing some modification of the machine.
Spinning of worsted yarn
Worsted yarns are made from long wool fibers that are combed and spun tightly. This makes worsted yarns stronger than woolen yarns. The scouring process removes grease from wool and includes several stages: pre-opening, opening and beating, scouring, drying, and reblending. Worsted yarns are produced through processes like carding, combing, drafting, and ring spinning to align the fibers parallel and produce a smooth yarn. There are two main systems - the English system produces finer yarns through oiling and tight twisting, while the French system does not use oil for softer worsted yarns.
Wool spinning
This document provides information on principles of wool spinning. It discusses the classification of wool types, how wool is obtained from sheep, and the processes involved in preparing wool for yarn production. The key steps discussed are:
1. Sorting and grading wool based on fiber length, waviness and quality.
2. Scouring wool to remove grease and other impurities.
3. Mechanically processing wool through carding to disentangle fibers, combing to align fibers, and drafting and spinning to form yarn.
4. The three main mechanical processing routes - worsted, semi-worsted and woollen - which differ in the level of fiber alignment and short fibers in the
Honeycomb, Mock Leno, Huckaback weaves and Dobby Figure Designs
Miscellaneous Weaves:
Honeycomb, Mock Leno,
Huckaback, Dobby Figure Designs
Designs in which the ornament consists chiefly of small, detached spots or figures are employed in nearly all classes of yarn and yarn combinations, for dress fabrics, fancy vesting, and other textures in which elaborate figure ornamentation is not desired.
Fancy Yarns
Fancy yarns are special products of spinning, twisting, wrapping, texturing and knitting, etc. The demand for yarns with structural and/or optical effects is due to the special aesthetic and high decorative appeal to the woven, knitted materials, and other textiles as well. Textile materials that are produced using yarns with effects find applications in normal and high fashion clothing.
Summary of pressure vessel 1
The document provides information on the design of pressure vessels. It defines a pressure vessel as a container designed to operate at pressures above 15 Psi. Several factors must be considered in the design, including internal and external pressures, weight, loads, temperature gradients, and stresses. Failure could result from excessive stress, plastic deformation, corrosion, or fatigue if not properly designed. The key components of a pressure vessel include the shell, heads, nozzles, and supports. Common types of heads are torispherical, ellipsoidal, and hemispherical. Formulas are provided to calculate thickness requirements for shells and heads based on internal pressure.
Textile softener
Softening agents are applied to textiles to improve their hand, drape, cutting and sewing qualities. An effective softener must be readily dispersible in rinse water and rapidly absorbed so that uniform deposition on the fabric can occur within a relatively short treatment time and generally, exhaustion should take place in about 5min for the softener to be effective and economically usable. It must impart softness, fluffiness and lubricity to the treated cloth and reduce static build-up, especially in the case of hydrophobic fibers like cellulose acetate, nylon, polyester and acrylic fibers. These effects should be obtained without the loss of fabric whiteness or brightness, and then the treated fabric should retain its ability to absorb in subsequent use for drying the body (bath towels) or other surfaces. Fabric softener (also called fabric conditioner) is used to prevent static cling and make fabric softer. It is available as a liquid or as dryer sheets. Popular brand names include Downy (Lenor), Snuggle, Bounce, Comfort and Sta-Soft.I believe that, the knowledge of this report will help future carrier of every textile engineer.
Advance spinning techniques
The document discusses various spinning techniques, including rotor spinning. It provides a history of rotor spinning, describing its development from early prototypes in the 1950s to widespread commercial use by the 1970s. It explains the basic operational sequence of rotor spinning, which involves feeding a sliver of fibers into a rapidly rotating rotor that separates, compacts, and twists the fibers into yarn. The document compares properties of rotor-spun and ring-spun yarns.
Effect of core draft on the properties of core spun yarn
1. The document discusses the effect of core draft on the properties of core spun yarn. It defines core spun yarn and describes different production methods including ring, rotor, and friction spinning.
2. Key process variables that affect properties are identified as core sheath ratio, pre-tension of the core material, spinning draft, number of roving feeds, and twist level. An optimal draft range is recommended based on yarn count.
3. Problems of core spinning like sheath stripping are discussed. End uses of core spun yarns include lingerie, swimwear, socks, and sportswear due to improved properties.
TYPES OF YARNS & APPLICATION& PROPERTIES
This document provides information on different types of yarns including their physical properties, advantages, disadvantages, and end applications. It discusses jute, acrylic, nylon, spandex, and cotton. For each yarn type, it outlines properties like tenacity, density, elongation at break, burning characteristics, and more. It also lists common end uses for each yarn such as bags for jute, clothing for acrylic and nylon, hosiery for nylon, exercise clothing for spandex, and more.
Textile calculations
1.5 kg/kg of sized yarn
This document provides information on textile calculations related to fibre fineness, yarn counts, conversions, and production calculations for various textile processes. Some key points include:
- Micronaire value, denier, and micron are units used to measure fibre fineness for cotton, man-made fibers, and wool respectively.
- There are indirect and direct systems for classifying yarn counts including English, French, metric, worsted, and tex/denier systems.
- Formulas are provided for calculating production rates for processes like blowroom, carding, drawframe, speedframe, ringframe, winding, and s
Viewers also liked (12)
Honeycomb, Mock Leno, Huckaback weaves and Dobby Figure Designs
Honeycomb, Mock Leno, Huckaback weaves and Dobby Figure Designs
Effect of core draft on the properties of core spun yarn
Effect of core draft on the properties of core spun yarn
Similar to Friction Spinning
Friction spinning
This document discusses friction spinning, also known as DREF spinning. It is an open-end spinning system that uses frictional forces between two counter-rotating rollers to twist individual fibers into yarn. The key steps in friction spinning are feeding fibers onto a drum surface where they are stacked into a bundle, wrapping around the bundle as it rotates between the rollers, and inserting twist as the yarn tail is pulled by a delivery roll. There are different types of DREF friction spinning systems including DREF-1 through DREF-3000, with DREF-2000 employing a rotating carding drum to open slivers into single fibers before carrying them into the nip of two perforated spinning drums where they are
Frictionspinning
Friction spinning, also known as Dref spinning, is a textile production method suitable for coarse yarns and core-wrapped yarns. It was developed in 1975 and produces bulky yarns with low tensile strength, making them suitable for blankets, mops, and filters. The process involves opening fibers, reassembling them between two drums that rotate in opposite directions to impart twist, and withdrawing the newly formed yarn. Several generations of the Dref spinning system were developed over time to improve quality, productivity, and the range of yarns that could be produced.
FRICTION SPINNING TECHNOLOGY, (M.S)
Dref system is Dref 3000
which was introduced in
2003.It has higher
production capacity than
Dref 2000.
This document discusses friction spinning, also known as Dref spinning. It is a textile technology suitable for spinning coarse yarn counts and technical core-wrapped yarns. Dref yarns have low tensile strength, making them suitable for blankets, mops, and filters. The technology was developed in 1975 and allows yarns like rayon and Kevlar to be spun. Friction spinning uses two friction surfaces to roll fibers into yarn with very little tension applied. This makes it more productive than other spinning methods like ring and rotor spinning. Developments
DREF Friction Spinning.pptx
This document provides information about friction spinning presented by three students. It describes friction spinning as an open-end spinning system developed in 1975 by Dr. Ernst Fehrer that can produce highly uniform yarns at high production rates with low costs. The document outlines the history of friction spinning and details several types of DREF friction spinning processes including DREF-1, DREF-2, DREF-3, DREF-5, DREF-2000, and DREF-3000. It explains the principle, yarn formation process involving fiber feeding, integration and twist insertion, as well as advantages and limitations of friction spinning.
Advance spinning Dr.Ash
Ring, rotor, compact, air-jet and other forms of spinning are discussed in this presentation along with Illustrations. the crisp and clear explanation helps in understanding the basic know how of advance methods of spinning
Fancy Spinning
The document summarizes different types of specialty yarns including Bobtex, chenille, slub, siro, and core spun yarns. It provides details on the production processes, properties, and end uses of each yarn type. The Bobtex process produces an integrated composite yarn using a core of filaments or multifilaments covered with staple fibers and a polymer layer. Chenille yarn has a fuzzy surface due to short cut pile yarns wrapped around a core. Slub yarn is produced with intentional thicker and thinner sections. Siro spinning combines spinning and twisting in one step to make a two-fold yarn. Core spinning covers a core yarn, typically filament,
Rotor spinning
The document discusses rotor spinning technology. It describes the key tasks of a rotor spinning machine including opening fibers, cleaning, homogenizing, combining, ordering, improving evenness, imparting strength, and winding. It provides a historical overview of rotor spinning development from the 1930s to present day. It then details the major components and processes involved, including fiber feeding, separation and transport, fiber collection and alignment on the rotor, yarn formation through twist insertion, and yarn take-off and winding. The principles of rotor spinning and factors that influence yarn twist and quality are also summarized.
WRAP AND FRICTION SPINNING SYSTEM
The document discusses wrap spinning and friction spinning systems for yarn production, including descriptions of the wrap spinning and DREF friction spinning processes, their advantages and limitations, end uses of wrap yarns, manufacturers of wrap spinning machines, classifications of friction spinning systems, and features of the DREF-II and DREF-III friction spinning machines.
Wrap spinning
This presentation discusses various methods of wrap spinning yarns. It describes the selfil, repco, hollow spindle, ring frame, differential twist, wrap rotor, woolen card, and parafil systems. The hollow spindle method is identified as the most important technique, involving drafting fibers through a hollow spindle while wrapping with a filament to produce wrap yarns in a single continuous process without true twisting. Other methods like the selfil and repco systems use self-twisting to wrap core fibers with filaments.
Dry laid nonwoven
This document summarizes techniques for dry laid nonwoven fabrics. It discusses fibre selection and preparation, including bale opening and blending. There are two main web formation methods: mechanical (using cards or garnets) and aerodynamic (air-laid). Webs can be layered longitudinally, crosswise, or perpendicularly. Bonds are formed through needle punching, stitch bonding, thermal bonding, chemical bonding (using latex), or hydroentanglement. Needle punching uses barbed needles to mechanically interlock fibers. Thermal bonding melts thermoplastic fibers like polypropylene to fuse the web.
Spinng Section
The document discusses the spinning section process of yarn manufacturing. Key steps include:
1) Blowroom processing which opens, cleans, and blends cotton fibers into a uniform lap.
2) Carding which further cleans and straightens fibers into a sliver.
3) Drawing which blends, doubles, and drafts slivers to produce a more uniform product.
4) Roving/Simplex frame which drafts slivers and inserts minor twist to produce roving.
5) Ring frame which further drafts and twists roving to produce yarn.
Group Presentation by 3001,3008,3009,3013 last of 4 digit.pptx
This presentation discusses the process of spinning worsted yarn. It begins with an introduction to worsted yarn, noting that it is made from long wool fibers that are combed and spun tightly. The presentation then outlines the manufacturing process, including sheep shearing, wool sorting, blending, scouring, carding, combing, roving, and ring or mule spinning. Additional steps like winding and plying may also be included. Finally, it discusses the English and French systems for worsted yarn production, noting differences like oiling and twist levels that result in varying yarn properties.
Fibre to yarn
Fibers are converted into yarns through several processes to prepare them for fabric construction. Fibers are first opened, blended, and cleaned. They then undergo either carding or combing to further clean and align the fibers into slivers. The slivers are drawn and spun into yarns, which can be done through ring spinning, rotor spinning, or air jet spinning. Ring spinning produces the highest quality yarns while rotor and air jet spinning have higher production rates. The yarns are then wound onto packages or cones and are ready to be used to create fabrics through weaving or knitting.
Basics of Fabric Manufacturing
The document provides information about the basics of fabric manufacturing processes. It discusses the key steps which are:
1) Yarn production from the spinning department which includes processes like winding, creeling, and warping. Warping can be done using direct/beam warping or indirect/sectional warping methods.
2) Sizing of the warp yarns is then carried out to prepare them for weaving.
3) The warp yarns are threaded through the heddles and reed during loom preparation before weaving begins.
4) Weaving is the process that interlaces the warp and weft yarns to produce fabric. The fabric then undergoes inspection, folding
spinning
The document discusses the key processes involved in yarn production, including:
1. Spinning preparatory processes like bale opening, cleaning, and mixing of fibers.
2. Carding to separate and align fibers into slivers.
3. Drawing to further mix and homogenize slivers.
4. Optional combing to remove short fibers for finer yarns.
5. Main spinning systems like ring spinning and open-end spinning to draft and twist fibers into yarn.
6. Winding yarn into packages for further processing or use in textiles.
Yarn Manufacturing
Textile yarn manufacturing involves several key steps. Fibers are first opened and cleaned through blowroom and carding processes. Drawing further arranges fibers into parallel strands called slivers. Roving attenuates slivers and adds twist. Ring frames then spin roving into yarn using drafts and twist. Combing upgrades raw materials by removing short fibers. The processes work to arrange, draft, and twist fibers into consistent yarns for weaving or other uses.
Abhi rana)4. dry laid non woven fabrics
This document discusses dry laid non-woven fabrics. It describes the four phases of non-woven technology: fiber selection, fiber preparation, web formation and layering, and bonding and stabilization of the web. It then provides details on different fiber properties and various web formation methods like carding, garnetting, air laying and centrifugal dynamic random carding. Finally, it covers bonding methods for non-wovens like needle punching, stitch bonding, thermal bonding and hydroentanglement.
Spunlace (hydroentanglement)
Spunlacing, also known as hydroentanglement, is a process for bonding nonwoven fabrics using high-pressure water jets. Precursor webs made of fibers like cellulose are passed through multiple rows of water jets that entangle the fibers. This produces a bonded nonwoven fabric with properties like softness and absorbency. Key aspects of the process include forming the precursor web, passing it through water entanglement units with fine jet nozzles, and drying the saturated fabric. The process produces fabrics widely used in applications such as wipes, towels, and medical and protective clothing due to its strength and lack of binders.
Unit 5.1.2 5.1.3 ppt.pptx python extra work
Weaving involves interlacing two sets of yarns called warp and weft to form fabric. Preparation of these yarns for weaving involves processes like winding, warping, and sizing. Warp yarns require more preparation as they experience greater stresses during weaving. Weaving is done on handlooms or powerlooms. Handlooms are operated manually while powerlooms are mechanized and increase production speed. Common weaving techniques include throw shuttle, fly shuttle, and rapier looms.
Yarn properties effecting comfort of the fabric
Yarn properties such as twist, size, and texture affect the comfort properties of fabrics. High twist yarns result in fabrics with better durability but lower moisture absorption. Low twist yarns allow for better insulation and moisture absorption. Bulkier yarns like textured yarns provide more comfort through better absorbency, stretch, and insulation compared to smooth filament yarns. The type of yarn, whether spun, filament, or textured, determines characteristics like warmth, absorbency, durability, and ease of care for the resulting fabric. Yarn properties are thus an important consideration in designing comfortable fabrics.
Similar to Friction Spinning (20)
Group Presentation by 3001,3008,3009,3013 last of 4 digit.pptx
Group Presentation by 3001,3008,3009,3013 last of 4 digit.pptx
More from Zubair Awan
2. water pollution
The document discusses key terms and concepts related to water pollution, including chemical oxygen demand (COD), biochemical oxygen demand (BOD), and dissolved oxygen (DO). COD measures all organic and inorganic compounds that can be oxidized, while BOD specifically measures biologically degradable organic matter. BOD tests how much oxygen is consumed by microbes to break down organic waste over 5 days. COD values are always higher than BOD since COD includes non-biodegradable materials. Turbidity is a measure of cloudiness caused by suspended particles, while total suspended solids is a direct measurement of particulate matter in water.
6.thermal resistant fibres
flame resistant fibers are materials that have flame resistance built into their chemical structures. Inherently flame retardant fibers swells and becomes thicker, forming a protective barrier between the heat source and the skin.
Scouring
Scouring is a process that removes natural and added impurities from textiles through the use of chemicals like alkalis and surfactants. It saponifies fats and waxes, breaks down proteins and pectins, and increases the textile's absorptive capacity. The type of scouring agent used depends on the fiber and extent of impurities. Scouring emulsifies and saponifies impurities to solubilize and suspend them for removal, improving dyeability and finish performance.
Mercirization
Mercerization is a process that treats cotton fabrics with a cold sodium hydroxide solution. This treatment causes the cotton fibers to swell and gives the fabric an increased luster and strength. John Mercer discovered the process in 1844, though it did not become popular until H.A. Lowe improved it in 1890 by preventing shrinkage during treatment. The modern process involves bathing cotton thread in sodium hydroxide then neutralizing it with an acid. This increases the thread's luster, strength, dye affinity, and mildew resistance. Mercerization results in fiber swelling and morphology changes that allow for more dye absorption and a brighter colored fabric with better color retention after washing.
Polymer Spinning and its different techniques
Polymer spinning involves extruding polymer fibers through spinnerets. There are several types including wet, dry, and melt spinning. Wet spinning is the oldest process where a polymer solution is extruded into a chemical bath, causing the fiber to precipitate and solidify. Dry spinning also uses a polymer solution but the solvent is evaporated using hot air rather than a chemical bath. Melt spinning melts the polymer and extrudes the melt directly through the spinneret where it solidifies upon contact with air.
Bleaching of Textiles
The document discusses various bleaching agents and methods. It explains that the aim of bleaching is to remove color from fibers through oxidative or reductive processes. Common bleaching agents mentioned include hydrogen peroxide, sodium hypochlorite, sodium chlorite, and chlorine dioxide. The effects of various parameters like pH, temperature, and metal ions are described for different bleaching systems. Sodium hypochlorite bleaching is noted to be the oldest industrial method while chlorine dioxide bleaching causes low fiber damage.
More from Zubair Awan (6)
Recently uploaded
Advanced control scheme of doubly fed induction generator for wind turbine us...
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Eric Nizeyimana's document 2006 from gicumbi to ttc nyamata handball play
this notes have been created
by Eric36 at nyamata ttc
after readings
pe book for y2sme .
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building.pdf
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building
Unit-III-ELECTROCHEMICAL STORAGE DEVICES.ppt
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
A review on techniques and modelling methodologies used for checking electrom...
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
22CYT12-Unit-V-E Waste and its Management.ppt
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
官方认证美国密歇根州立大学毕业证学位证书原版一模一样
原版一模一样【微信：741003700 】【美国密歇根州立大学毕业证学位证书】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Recycled Concrete Aggregate in Construction Part III
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
5214-1693458878915-Unit 6 2023 to 2024 academic year assignment (AutoRecovere...
Bigdata of technology
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
Embedded machine learning-based road conditions and driving behavior monitoring
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
哪里办理(csu毕业证书)查尔斯特大学毕业证硕士学历原版一模一样
原版一模一样【微信：741003700 】【(csu毕业证书)查尔斯特大学毕业证硕士学历】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Recently uploaded (20)
Advanced control scheme of doubly fed induction generator for wind turbine us...
Advanced control scheme of doubly fed induction generator for wind turbine us...
Eric Nizeyimana's document 2006 from gicumbi to ttc nyamata handball play
Eric Nizeyimana's document 2006 from gicumbi to ttc nyamata handball play
BPV-GUI-01-Guide-for-ASME-Review-Teams-(General)-10-10-2023.pdf
BPV-GUI-01-Guide-for-ASME-Review-Teams-(General)-10-10-2023.pdf
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building.pdf
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building.pdf
A review on techniques and modelling methodologies used for checking electrom...
A review on techniques and modelling methodologies used for checking electrom...
Manufacturing Process of molasses based distillery ppt.pptx
Manufacturing Process of molasses based distillery ppt.pptx
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Recycled Concrete Aggregate in Construction Part III
Recycled Concrete Aggregate in Construction Part III
5214-1693458878915-Unit 6 2023 to 2024 academic year assignment (AutoRecovere...
5214-1693458878915-Unit 6 2023 to 2024 academic year assignment (AutoRecovere...
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
Embedded machine learning-based road conditions and driving behavior monitoring
Embedded machine learning-based road conditions and driving behavior monitoring
Friction Spinning
- 3. DEFINATION OF FRICTION SPINNING A friction spinning is type of spinning in which yarn is manufactured with the help of friction It is also known as DREF spinning system
- 4. Introduction of dref spinning system Friction (DREF) spinning system is an Open-end spinning system. Along with the frictional forces in the spinning zone the yarn formation takes place. The DREF system is used to produce yarns with high delivery rate about 300mpm. It produce a highly uniform yarn from diverse stock including short or difficult to handle at high production rates and low labor and energy expenses It was introduced by Dr Fehrer in 1975
- 5. Principal of friction spinning Fibers are delivered onto the drum surface, which transports and stacks the fibers to the fiber bundle rotating between two surfaces moving in opposite directions. The fibers wrap around the bundle surface. wrapped fiber bundle (yarn tail) is tugged by the yarn delivery roll. Therefore twists by fiber arrangement are generated. Due to separate yarn winding and method of twist insertion, it has capability to go for high production rate
- 6. DIAGRAM
- 8. Uses They are used to prepare blankets They are used to prepare filters for water system It is used to prepare kevlar body armour This technique is used to prepare mop yarn It is used to prepare Rayon
- 9. THANK YOU!