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Feed Screw Manufacturing & Design For Injection / Extrusion / Blowmolding | G...
Contact Glycon at (800) 255-9969 for more information. Get a fast quote http://www.glycon.com/quote
Glycon Corp. is an innovator in the design and manufacturing of feed screws, barrels, non-return valves and other melt stream solutions for injection molding, extrusion and blowmolding.
For more than 30 years, Glycon Corp. has focused on helping our customers to become better, more efficient processors. Our current family of advanced technologies are all designed specifically to improve throughput, increase quality, reduce scrap and streamline processing. Whether your application is simple or complex, we can help improve your machine efficiency, part quality and reliability.
Product & Process Development
As processors gear up for production on a new project, Glycon's dedicated Product Development Center has the resources to help optimize screw performance, testing several different designs and then zeroing in on the best melting and mixing combination. Or, if a molder is having a problem with splay or burning, or if an extruder is not getting proper mixing or sufficient throughput, technicians at the Center, can reproduce these problems under controlled conditions and quickly find ways to attack the problem through the application of the latest screw and processing technology.
Rebuilding Services
Glycon Corp. experts can help extend the life of costly meltstream components. Feedscrews can be rebuilt to match original performance specifications. Barrels can be resleeved to original dimensions. Other components, like our QSO® non-return valve, can be rebuilt. All done quickly and with the highest standard of quality.
Preventive Maintenance & Installation
Glycon Corp. can assist with setup and maintenance of your feedscrew and related meltstream components. Our 10-Step Field Service Program streamlines setup and checks that your feedscrews are operating correctly. We can also design a maintenance program to reduce downtime and keep your systems operating as efficiently as the day they were installed. And we can train your maintenance personnel or implement the program ourselves.
Our products include:
Distributive Mixing & Melting Screw
Barrier Screws
Feedscrew Rebuilding
General Purpose Feed Screws
Glycon Barrels
QSO Non-Return Valves
Feed Throats
End Caps
Tie Bars & Tie Rods
SmartBarrel
Screw and Barrel
Feed Extruder Screw Design
Field Services
Contact Glycon at (800) 255-9969 for more information.
Get a fast quote http://www.glycon.com/quote
Basic Screw Geometry: Things Your Extruder Screw Designer Never Told You Abou...
Basic Screw Geometry: Things Your Extruder Screw Designer Never Told You Abou...R&B Plastics Machinery
This document provides an overview of basic screw geometry for single screw extruders. It defines key terms like flighted length, screw diameter, and L/D ratio. It describes the different sections of the screw - feed, transition, and metering - and factors that influence their design like material properties, length, and compression ratio calculations. The document also discusses two-stage vented screw designs and how to calculate compression ratios and pumping capacities for different screw configurations.Things Your Extruder Screw Designer Never Told You About Screws - Slideshow
This document provides an overview of screw design concepts for plastic extrusion. It discusses common screw nomenclature and sections including flighted length, diameter, feed, transition, and metering. Key concepts covered include length to diameter ratio, coefficient of friction, solids conveying theory, drag and pressure flow, and how viscosity affects pumping. Different screw technologies like barrier screws and two-stage screws are also summarized. The presentation emphasizes providing screw manufacturers with resin data and understanding screw mechanics to ensure optimal screw design.
Machine design 1 (md) Mechanical Engineering handwritten classes notes (study...
Design of Machine Element / Machine design (md) handwritten classes notes (study materials) for IES PSUs GATE
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Thread
This document discusses different types of screw threads including external and internal threads, right and left hand threads, single and multi-start threads. It provides details on thread specifications such as shape, pitch, diameter, length, number of starts, material, and direction. It then describes various forms of threads including British Standard Fine (BSF), British Standard Pipe (BSP), British Standard Whitworth (BSW), square, acme, knuckle, and buttress threads. It discusses the applications of each thread type and concludes with references used.
Plastics processing Manual (CIPET JAIPUR)
it is PDF are typed of myself. study triks & short & sweet (Technical manual) Of Diploma in Plastics technology(DPT-DPMT). All machine knowlage in plastics processing.
Er. Naresh Dhaker
(8890881858)
(CIPET JAIPUR)
Joining of plastics
This document provides information on various plastic joining processes including ultrasonic welding, vibration welding, spin welding, and induction welding. It discusses the principles, advantages, disadvantages, applications, suitable materials, and design recommendations for each process. The key points are:
1. Ultrasonic welding uses high-frequency vibrations to melt plastic surfaces and join them. It is fast and economical but requires specifically designed joints.
2. Vibration welding generates heat through high-amplitude, low-frequency vibrations. It can join large parts but has initial high equipment costs.
3. Spin welding friction welds circular joints by rotating one part at high speed. It is simple and energy efficient but limited to circular
Information of injection molding screw
VERY USE FULL FOR ALL INJECTION MOLDING STUDENT.
Screw is the heart for most of the ideal process parameters in injection molding.
Recommended
Feed Screw Manufacturing & Design For Injection / Extrusion / Blowmolding | G...
Contact Glycon at (800) 255-9969 for more information. Get a fast quote http://www.glycon.com/quote
Glycon Corp. is an innovator in the design and manufacturing of feed screws, barrels, non-return valves and other melt stream solutions for injection molding, extrusion and blowmolding.
For more than 30 years, Glycon Corp. has focused on helping our customers to become better, more efficient processors. Our current family of advanced technologies are all designed specifically to improve throughput, increase quality, reduce scrap and streamline processing. Whether your application is simple or complex, we can help improve your machine efficiency, part quality and reliability.
Product & Process Development
As processors gear up for production on a new project, Glycon's dedicated Product Development Center has the resources to help optimize screw performance, testing several different designs and then zeroing in on the best melting and mixing combination. Or, if a molder is having a problem with splay or burning, or if an extruder is not getting proper mixing or sufficient throughput, technicians at the Center, can reproduce these problems under controlled conditions and quickly find ways to attack the problem through the application of the latest screw and processing technology.
Rebuilding Services
Glycon Corp. experts can help extend the life of costly meltstream components. Feedscrews can be rebuilt to match original performance specifications. Barrels can be resleeved to original dimensions. Other components, like our QSO® non-return valve, can be rebuilt. All done quickly and with the highest standard of quality.
Preventive Maintenance & Installation
Glycon Corp. can assist with setup and maintenance of your feedscrew and related meltstream components. Our 10-Step Field Service Program streamlines setup and checks that your feedscrews are operating correctly. We can also design a maintenance program to reduce downtime and keep your systems operating as efficiently as the day they were installed. And we can train your maintenance personnel or implement the program ourselves.
Our products include:
Distributive Mixing & Melting Screw
Barrier Screws
Feedscrew Rebuilding
General Purpose Feed Screws
Glycon Barrels
QSO Non-Return Valves
Feed Throats
End Caps
Tie Bars & Tie Rods
SmartBarrel
Screw and Barrel
Feed Extruder Screw Design
Field Services
Contact Glycon at (800) 255-9969 for more information.
Get a fast quote http://www.glycon.com/quote
Basic Screw Geometry: Things Your Extruder Screw Designer Never Told You Abou...
Basic Screw Geometry: Things Your Extruder Screw Designer Never Told You Abou...R&B Plastics Machinery
This document provides an overview of basic screw geometry for single screw extruders. It defines key terms like flighted length, screw diameter, and L/D ratio. It describes the different sections of the screw - feed, transition, and metering - and factors that influence their design like material properties, length, and compression ratio calculations. The document also discusses two-stage vented screw designs and how to calculate compression ratios and pumping capacities for different screw configurations.Things Your Extruder Screw Designer Never Told You About Screws - Slideshow
This document provides an overview of screw design concepts for plastic extrusion. It discusses common screw nomenclature and sections including flighted length, diameter, feed, transition, and metering. Key concepts covered include length to diameter ratio, coefficient of friction, solids conveying theory, drag and pressure flow, and how viscosity affects pumping. Different screw technologies like barrier screws and two-stage screws are also summarized. The presentation emphasizes providing screw manufacturers with resin data and understanding screw mechanics to ensure optimal screw design.
Machine design 1 (md) Mechanical Engineering handwritten classes notes (study...
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Thread
This document discusses different types of screw threads including external and internal threads, right and left hand threads, single and multi-start threads. It provides details on thread specifications such as shape, pitch, diameter, length, number of starts, material, and direction. It then describes various forms of threads including British Standard Fine (BSF), British Standard Pipe (BSP), British Standard Whitworth (BSW), square, acme, knuckle, and buttress threads. It discusses the applications of each thread type and concludes with references used.
Plastics processing Manual (CIPET JAIPUR)
it is PDF are typed of myself. study triks & short & sweet (Technical manual) Of Diploma in Plastics technology(DPT-DPMT). All machine knowlage in plastics processing.
Er. Naresh Dhaker
(8890881858)
(CIPET JAIPUR)
Joining of plastics
This document provides information on various plastic joining processes including ultrasonic welding, vibration welding, spin welding, and induction welding. It discusses the principles, advantages, disadvantages, applications, suitable materials, and design recommendations for each process. The key points are:
1. Ultrasonic welding uses high-frequency vibrations to melt plastic surfaces and join them. It is fast and economical but requires specifically designed joints.
2. Vibration welding generates heat through high-amplitude, low-frequency vibrations. It can join large parts but has initial high equipment costs.
3. Spin welding friction welds circular joints by rotating one part at high speed. It is simple and energy efficient but limited to circular
Information of injection molding screw
VERY USE FULL FOR ALL INJECTION MOLDING STUDENT.
Screw is the heart for most of the ideal process parameters in injection molding.
ME 312 Mechanical Machine Design [Screws, Bolts, Nuts]
ME 312 Mechanical Machine Design is the flagship course of the mechanical engineering department at DHA Suffa University. This lecture is about mechanical fasteners and non-permanent joints. The course is offered every fall by Dr. Bilal A. Siddiqui.
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Rubber extrusion is in itself a vast subject, and when you know the basics outlined in this presentation, you have made a knowledgeable start.
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This document provides an overview of Johnson Controls YK centrifugal chillers ranging from 250 to 3000 tons. It describes key features such as matched components that maximize efficiency, open-drive design that eliminates risk of refrigerant contamination, and precision control of compressor oil pressure. It also summarizes approvals, nomenclature, contents, dimensions, weights, specifications, and metric conversions.
Guide To Plastic Injection Molding Terminology - GreenLeaf Industries, Lenoir...
Guide To Plastic Injection Molding Terminology - GreenLeaf Industries, Lenoir...GreenLeaf Industries
It is our pleasure to introduce our latest resource guide to help designers, engineers and purchasing professionals navigate the world of plastic injection molding. We think it is one of the most comprehensive of it's kind with 200+ terms included. You might find it helpful in training new employees to the industry or your company. Thank you for viewing, and please share it with others who might benefit!Autoclave molding
Autoclave is a closed vessel (Round or Cylindrical) in which processes occur under simultaneous application of high temperature and pressure. Autoclave molding technique is similar to vacuum bag and pressure bag molding method with some modifications. This method employs an autoclave to provide heat and pressure to the composite product during curing.
Types of patterns in sand casting
Single piece pattern.
Split piece pattern.
Loose piece pattern.
Match plate pattern.
Sweep pattern.
Gated pattern.
Skeleton pattern
Follow board pattern.
Cope and Drag pattern
Injection moulding ppt
Injection moulding is a manufacturing technique for making parts from both thermoplastic and thermosetting. Plastic material in production molten plastic is injected at high pressure into a mould.
Plastic Injection Molding 101: The Basics
Unsure about injection molding? Want to learn more about it? Here are the basics to get you up to speed on the process and the industry!
Hot and cold working process, drawing tube, wire and spinning
The document discusses various bulk deformation processes used to shape metals, including hot working, cold working, drawing, and metal spinning. Hot working involves shaping metals above their recrystallization temperature using processes like rolling, forging, and extrusion. Cold working shapes metals below the recrystallization temperature through drawing, bending, and squeezing, increasing strength but decreasing ductility. Drawing is used to produce wires, rods, and tubes by pulling the metal through a die to reduce its size. Metal spinning forms axisymmetric parts by pressing a rotating workpiece against a mandrel using a tool.
Screw Threads
This document discusses different types of screw threads, their purposes, and terminology. It describes threads in terms of pitch, lead, thread form, and various thread standards. It also covers thread representation, types of threaded fasteners like bolts and screws, nuts, and thread gauging. The overall purpose of threads is to hold parts together, adjust parts relative to each other, and transmit power or motion between parts.
Resin Transfer Molding (RTM)
RTM is a low-pressure molding process, where a mixed resin and catalyst are injected into a closed mold containing a fiber pack or preform . when the resin has cured the mold can be opened and finished component removed.
Mould design for injection moulding
This document discusses the design of a two-plate injection mold for producing a mobile phone casing out of ABS or PC polymer. It describes the main components of the mold including the two plates, pinpoint gate for material entry, hot runner system, venting channels to remove gases, water cooling channels where needed, and pin ejectors. It also discusses the placement of four cavity inserts with an optimized center distance between them. A diagram provides a cross-sectional view of the overall mold design showing the sprue bushing, two cavities, ejection plate, and guiding pillars.
Plastics processing
plastic processing and their types extrusion ,compression molding ,injection molding , calendering ,blow molding ,strip heating ,vacuum forming ,rotational molding
Plastics processing Manual (CIPET JAIPUR)
PLASTIC PROCESSING MANUAL OF CIPET JAIPUR
NARESH DHAKER
8890881858
CIPET JAIPUR
2. injection moulding
The document provides an overview of injection moulding, including:
- The history of injection moulding beginning in the 1870s.
- The injection moulding process which involves injecting molten plastic into a closed mould.
- The main types of injection moulding machines: hand, plunger, and reciprocating screw types.
- Key machine components like the screw and their functions in plasticizing and injecting the material.
- Common materials used for injection moulding like ABS, nylon, polypropylene.
UC Davis_Invitation Letter
The document is an invitation letter from Samuel Sandoval Solis, an assistant professor at UC Davis, to Daniel Alejandro Gomez Martinez, a graduate student from Instituto Tecnologico de Estudios Superiores Monterrey, inviting him to join UC Davis as a visiting graduate student from January to June 2015. The letter acknowledges Daniel's interest in researching water resource planning and management focusing on Monterrey, Mexico and provides office space, but clarifies UC Davis will not provide financial support for Daniel's visit.
Pipe Extrusion Line
The document summarizes the key components and processes involved in pipe extrusion lines. Molten plastic is extruded through a die into the shape of a pipe. It is then calibrated to finalize dimensions before cooling. There are different types of dies, including spider-arm and cross-head dies, as well as calibration methods like using water-cooled mandrels, vacuum, or pressure to control the pipe thickness and dimensions. After calibration and cooling, haul-off units pull the pipe for cutting to final lengths.
Welding symbols
This document defines and explains common welding symbols used in technical drawings. It begins by identifying the required elements of a basic welding symbol: the reference line, arrow, and tail. The tail indicates welding processes and specifications. Additional symbols convey information like weld size, location, type (e.g. fillet, groove), and intermittent patterns. Terminology for different sides of the joint is also defined. In summary, the document provides an overview of standard welding symbols and their components used to communicate welding requirements in technical drawings and specifications.
Arc welding manual
The document provides information about welding techniques and arc welding. It discusses the parts of an electric arc welding setup including the power supply, electrode, workpiece and welding leads. It describes striking an arc and different welding positions. The document outlines the advantages and disadvantages of arc welding, including its simplicity but limited electrode length. It emphasizes the importance of safety practices when arc welding.
Plastic mold design overview ppt
This document provides an overview of plastic mould design and the injection moulding process. It discusses the importance of plastic parts in modern industries and advantages of plastics over metals. Key topics covered include design considerations for plastic parts, common plastic materials, types of moulds, injection mould components like the cavity and core, and the six main steps of the injection moulding process: mould closing and clamping, injection, dwelling, cooling, plasticizing resin, and mould opening and ejection. The document also provides a brief overview of injection moulding machines.
Screw and Barrel Inspection
Screw and barrel inspection plays a very important part in achieving exceptional production performance. The screw and barrel are major components of extrusion, injection molding and blow molding processes, and should be measured for wear at least once a year (preferably twice a year). Many U.S. companies schedule preventive maintenance (PM) during the week of Independence Day and again during the week of Christmas.
Screw Recommendations for Specific Resins and Processes
By Tim Womer, Chief Process Consultant, R&B Plastics Machinery LLC.
More Related Content
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ME 312 Mechanical Machine Design [Screws, Bolts, Nuts]
ME 312 Mechanical Machine Design is the flagship course of the mechanical engineering department at DHA Suffa University. This lecture is about mechanical fasteners and non-permanent joints. The course is offered every fall by Dr. Bilal A. Siddiqui.
Extrusion and Screw Design
Rubber extrusion is in itself a vast subject, and when you know the basics outlined in this presentation, you have made a knowledgeable start.
BE_YK_EngineeringGuide_G
This document provides an overview of Johnson Controls YK centrifugal chillers ranging from 250 to 3000 tons. It describes key features such as matched components that maximize efficiency, open-drive design that eliminates risk of refrigerant contamination, and precision control of compressor oil pressure. It also summarizes approvals, nomenclature, contents, dimensions, weights, specifications, and metric conversions.
Guide To Plastic Injection Molding Terminology - GreenLeaf Industries, Lenoir...
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It is our pleasure to introduce our latest resource guide to help designers, engineers and purchasing professionals navigate the world of plastic injection molding. We think it is one of the most comprehensive of it's kind with 200+ terms included. You might find it helpful in training new employees to the industry or your company. Thank you for viewing, and please share it with others who might benefit!Autoclave molding
Autoclave is a closed vessel (Round or Cylindrical) in which processes occur under simultaneous application of high temperature and pressure. Autoclave molding technique is similar to vacuum bag and pressure bag molding method with some modifications. This method employs an autoclave to provide heat and pressure to the composite product during curing.
Types of patterns in sand casting
Single piece pattern.
Split piece pattern.
Loose piece pattern.
Match plate pattern.
Sweep pattern.
Gated pattern.
Skeleton pattern
Follow board pattern.
Cope and Drag pattern
Injection moulding ppt
Injection moulding is a manufacturing technique for making parts from both thermoplastic and thermosetting. Plastic material in production molten plastic is injected at high pressure into a mould.
Plastic Injection Molding 101: The Basics
Unsure about injection molding? Want to learn more about it? Here are the basics to get you up to speed on the process and the industry!
Hot and cold working process, drawing tube, wire and spinning
The document discusses various bulk deformation processes used to shape metals, including hot working, cold working, drawing, and metal spinning. Hot working involves shaping metals above their recrystallization temperature using processes like rolling, forging, and extrusion. Cold working shapes metals below the recrystallization temperature through drawing, bending, and squeezing, increasing strength but decreasing ductility. Drawing is used to produce wires, rods, and tubes by pulling the metal through a die to reduce its size. Metal spinning forms axisymmetric parts by pressing a rotating workpiece against a mandrel using a tool.
Screw Threads
This document discusses different types of screw threads, their purposes, and terminology. It describes threads in terms of pitch, lead, thread form, and various thread standards. It also covers thread representation, types of threaded fasteners like bolts and screws, nuts, and thread gauging. The overall purpose of threads is to hold parts together, adjust parts relative to each other, and transmit power or motion between parts.
Resin Transfer Molding (RTM)
RTM is a low-pressure molding process, where a mixed resin and catalyst are injected into a closed mold containing a fiber pack or preform . when the resin has cured the mold can be opened and finished component removed.
Mould design for injection moulding
This document discusses the design of a two-plate injection mold for producing a mobile phone casing out of ABS or PC polymer. It describes the main components of the mold including the two plates, pinpoint gate for material entry, hot runner system, venting channels to remove gases, water cooling channels where needed, and pin ejectors. It also discusses the placement of four cavity inserts with an optimized center distance between them. A diagram provides a cross-sectional view of the overall mold design showing the sprue bushing, two cavities, ejection plate, and guiding pillars.
Plastics processing
plastic processing and their types extrusion ,compression molding ,injection molding , calendering ,blow molding ,strip heating ,vacuum forming ,rotational molding
Plastics processing Manual (CIPET JAIPUR)
PLASTIC PROCESSING MANUAL OF CIPET JAIPUR
NARESH DHAKER
8890881858
CIPET JAIPUR
2. injection moulding
The document provides an overview of injection moulding, including:
- The history of injection moulding beginning in the 1870s.
- The injection moulding process which involves injecting molten plastic into a closed mould.
- The main types of injection moulding machines: hand, plunger, and reciprocating screw types.
- Key machine components like the screw and their functions in plasticizing and injecting the material.
- Common materials used for injection moulding like ABS, nylon, polypropylene.
UC Davis_Invitation Letter
The document is an invitation letter from Samuel Sandoval Solis, an assistant professor at UC Davis, to Daniel Alejandro Gomez Martinez, a graduate student from Instituto Tecnologico de Estudios Superiores Monterrey, inviting him to join UC Davis as a visiting graduate student from January to June 2015. The letter acknowledges Daniel's interest in researching water resource planning and management focusing on Monterrey, Mexico and provides office space, but clarifies UC Davis will not provide financial support for Daniel's visit.
Pipe Extrusion Line
The document summarizes the key components and processes involved in pipe extrusion lines. Molten plastic is extruded through a die into the shape of a pipe. It is then calibrated to finalize dimensions before cooling. There are different types of dies, including spider-arm and cross-head dies, as well as calibration methods like using water-cooled mandrels, vacuum, or pressure to control the pipe thickness and dimensions. After calibration and cooling, haul-off units pull the pipe for cutting to final lengths.
Welding symbols
This document defines and explains common welding symbols used in technical drawings. It begins by identifying the required elements of a basic welding symbol: the reference line, arrow, and tail. The tail indicates welding processes and specifications. Additional symbols convey information like weld size, location, type (e.g. fillet, groove), and intermittent patterns. Terminology for different sides of the joint is also defined. In summary, the document provides an overview of standard welding symbols and their components used to communicate welding requirements in technical drawings and specifications.
Arc welding manual
The document provides information about welding techniques and arc welding. It discusses the parts of an electric arc welding setup including the power supply, electrode, workpiece and welding leads. It describes striking an arc and different welding positions. The document outlines the advantages and disadvantages of arc welding, including its simplicity but limited electrode length. It emphasizes the importance of safety practices when arc welding.
Plastic mold design overview ppt
This document provides an overview of plastic mould design and the injection moulding process. It discusses the importance of plastic parts in modern industries and advantages of plastics over metals. Key topics covered include design considerations for plastic parts, common plastic materials, types of moulds, injection mould components like the cavity and core, and the six main steps of the injection moulding process: mould closing and clamping, injection, dwelling, cooling, plasticizing resin, and mould opening and ejection. The document also provides a brief overview of injection moulding machines.
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ME 312 Mechanical Machine Design [Screws, Bolts, Nuts]
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Hot and cold working process, drawing tube, wire and spinning
Hot and cold working process, drawing tube, wire and spinning
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Screw and Barrel Inspection
Screw and barrel inspection plays a very important part in achieving exceptional production performance. The screw and barrel are major components of extrusion, injection molding and blow molding processes, and should be measured for wear at least once a year (preferably twice a year). Many U.S. companies schedule preventive maintenance (PM) during the week of Independence Day and again during the week of Christmas.
Screw Recommendations for Specific Resins and Processes
By Tim Womer, Chief Process Consultant, R&B Plastics Machinery LLC.
Screw press and its performance
1. The document discusses screw presses, which are used to separate solids and liquids through compression and shear. It describes the types, construction, working principle, design considerations, and performance of screw presses.
2. Key aspects of screw press design include the diameter of the shaft, load lifted by the screw thread, and pressure developed. Performance is determined by parameters like capacity, power requirement, oil yield, efficiency, and extraction loss.
3. Examples are provided to calculate screw press specifications and performance metrics like oil efficiency and effectiveness based on given operating conditions and extraction results.
Barrel temperature profiles for barrier type screw
This document discusses recommended barrel temperature profiles for barrier type extrusion screws. It recommends:
1) Setting the die and adapter zones to the resin manufacturer's recommended melt temperature.
2) Setting the feed throat section 10-20°F warmer than ambient to preheat the material without causing bridging.
3) Installing screw cooling in the feed section to reduce friction and optimize solids conveying.
4) Evenly spacing the remaining zone temperatures between the feed and metering sections to gradually melt the resin using increased energy input.
Starting temperature profiles are provided for example resins to process them less stressfully and reduce wear on the screw and barrel.
A Method for Purging and Cleaning an Extruder Screw and Barrel
1) The best way to clean a screw and barrel is to remove the screw from the machine and clean it outside using brass tools and stearic acid rather than applying direct heat, which can damage the metal.
2) To purge the system, use HDPE plastic at 200C while slowly rotating the screw until the extrudate fully changes from the processing resin to HDPE.
3) Clean the screw using brass tools and stearic acid while exposing sections, then clean the barrel bore using a wire brush coated in copper gauze and stearic acid.
Feed Screw and Non Return Valve Terms Glossary | Glycon Corp.
http://www.glycon.com/feed-screw-non-return-valve-terms-glossary
Glycon Corp. is an innovator in the design and manufacturing of feed screws, barrels, non-return valves and other melt stream solutions for injection molding, extrusion and blowmolding.
Feed Screw Design Classification for Injection Molding / Extrusion / Blowmold...
As screw designs have evolved through the years, there are several generic categories that
single (as opposed to twin) screws can be divided into:
A.) Single flighted; (conventional) screws
B.) Mixing screws
C.) Barrier screws
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The Experimental Approach of Manufacturing Hardened Barrel Screw on Tradition...
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Rotary Drum or Disc Pelletizer?
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Our ITT 2015 will bring together relevant stakeholders to ensure maximum knowledge transfer and professional exchange between 17 - 19 November, 2015 at the Hotel Kempinski Taschenbergpalais in Dresden, Germany. During a full three-days-program with 2 conference days and 4 workshops you will meet international experts from OEMs, suppliers, and academia to discuss, hear and learn about their experiences and challenges in the fields of Intelligent Tire Technology.
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Heath bridges chemistry of rubber powerpoint
Rubber gets its elastic properties from its polymeric chemical makeup. The monomer that makes up natural rubber is isoprene, which contains two carbon-carbon double bonds. As latex dries, the isoprene molecules crowd together and the double bonds break, allowing the molecules to form bonds and link together into long polyisoprene polymer chains containing thousands of isoprene monomers each. As drying continues, electrostatic bonds form between the polyisoprene strands, giving rubber its stretchy texture by holding the fibers together. Temperature can affect the electrostatic interactions, with hot temperatures making rubber stickier and cold temperatures causing it to become brittle.
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Onno Maliepaard “Automation & Process Improvement Strategies”
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- The purchasing department is organized into three pillars focused on strategy, expertise-based activities, and transactional activities.
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The document discusses elastomers, a category of pliable plastic materials that are good at insulating, withstanding deformation, and stretching many times their length. It defines elastomers as materials with molecules that are tangled in a jumbled mess but become orderly when stretched. The document then describes several common types of elastomers, including natural rubber (polyisoprene), synthetic rubber (polychloroprene and polybutadiene), polystyrene, polyisobutylene. It lists uses of elastomers such as in automobile wheels, balls, bicycle seats, shoe soles and tire inner liners.
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Screw Recommendations for Specific Resins and Processes
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Barrel temperature profiles for barrier type screw
Barrel temperature profiles for barrier type screw
A Method for Purging and Cleaning an Extruder Screw and Barrel
A Method for Purging and Cleaning an Extruder Screw and Barrel
Feed Screw and Non Return Valve Terms Glossary | Glycon Corp.
Feed Screw and Non Return Valve Terms Glossary | Glycon Corp.
Feed Screw Design Classification for Injection Molding / Extrusion / Blowmold...
Feed Screw Design Classification for Injection Molding / Extrusion / Blowmold...
The Experimental Approach of Manufacturing Hardened Barrel Screw on Tradition...
The Experimental Approach of Manufacturing Hardened Barrel Screw on Tradition...
News on Intelligent Tire Technoloies - Smart Tire Materials - Innovation in T...
News on Intelligent Tire Technoloies - Smart Tire Materials - Innovation in T...
Onno Maliepaard “Automation & Process Improvement Strategies”
Onno Maliepaard “Automation & Process Improvement Strategies”
More from R&B Plastics Machinery
Solids conveying consistency
The material handling of the feedstock is a very critical part of the extrusion process. If the feedstock is not introduced to the feedsection of screw in a smooth and uniform matter, then the likelihood of a stable and consistent output is unlikely. This is the reason why it is very important that if regrind is added to the virgin feedstock, it must be done very consistently and uniformly. It should also be mentioned here that a very important part of the extrusion equipment is the hopper and feedthroat section. If the hopper and feedthroat sections are not designed properly, inconsistent material flow to the screw can take place. For example, if the conical section of the hopper (see figure) does not have the proper transition, the resin will not flow smoothly into the feedthroat of the extruder.
Extruder Screw Cooling
There are basically three Coefficients of Friction (Figure 1) that take place in the feed section of the screw, (1) between the barrel and the pellet, (2) between pellet to pellet, and (3) between the root of the screw and the plastic pellet.
Screw and barrel wear
Screw and barrel wear is critical in all plasticating applications whether it is extrusion, injection molding, and blow molding, plus twin screw extrusion. Excessive screw and barrel wear can cause instable throughput or recovery on reciprocating screws, increased melt temperature and reduced plasticating rates.
Regrind particle size
Almost all processes, extrusion, injection and blow molding require that regrind be used in the process. Depending on the process greatly determines the amount of regrind that is generated. Some processes produce very minimal amounts of regrind, such as an injection molding process using a hot runner system versus a flat sheet extrusion process producing thermoformed sheet and the entire skeleton has to be fed back into the process or a blow molding process which always generates large amounts of regrind.
Oversize Screw and Barrel
I have written in the past about screw/barrel wear and also screw rebuilding, but there are some screw and barrel shops that offer an alternative for excessive barrel wear and that is honing the barrel oversize and then rebuilding the screw oversize also to fit.
Over-hung Loads
Recently a processor installed a new screw into their 6” x 32:1 L/D extruder. Within a few weeks the hard facing that had been welded on the flight OD started to pop off. (As shown in the attached photo) The flight failure was in an isolated area, so it was then assumed that the failure was due to a poor weld bond. The screw was ultra-sonically inspected and the remaining flights showed good bore, but the entire screw was rebuilt and returned to the customer.
Extruder or Injection Molding Machine Startup and Shutdown Article
Many companies have their own procedure for starting up and shutting down an extruder or injection molding machine and, depending on the process, there may be reasons for the specific method. But from the point of view on the effect of the screw itself, the following procedure will produce the best overall results.
Instrument Calibration
1) The author was asked to investigate screw design problems at a sheet extrusion facility with issues on all 5 of its lines.
2) To begin, the author measured the thermal expansion of one extruder barrel according to theoretical calculations and found it was within 0.030 inches, showing around 0.750 inches of expansion as expected. Wear patterns on screw flights were also consistent.
3) Process data gathered revealed the screw speed readings were miscalibrated, with one reading 24% too low and another 23% too high compared to actual counts, indicating the importance of verifying instrument readings.
Gross Versus Net
Several years ago, a customer had ordered a new screw for their thin sheet process. They requested a throughput rate of 1600 lb/hr...
Buying a used extruder
When buying a used extruder, it is important to carefully inspect the gearbox, feed throat, and barrel for excessive wear. Additionally, the extruder must have adequate torque for the intended application. Over time, advances in screw design have allowed for higher throughput rates but require more torque. A typical older 3.5" extruder from the 1960s-1970s with a 75hp motor could produce 700-750 lb/hr of PVC but only 400-450 lb/hr of HDPE. Modern 3.5" extruders require a minimum of 125hp and can produce 650-700 lb/hr of HDPE with a 150hp motor and updated screw design. Make sure a used extruder has the
New and Improved Screw Technology for Processing INGEO™ PLA
Since the early 1990’s INGEO™ resins have made enormous improvements in the process ability of their bio-polymer resins. In the early days, when the resin was first being manufactured at pilot plant levels, extrusion processing of INGEO™ was very difficult.
Today, natural additives are being used to improve the process ability of these resins. Several new lubricant additive packages were tested to determine which package produced the best overall performance and process improvements. The process data was used to quantify the process ability of the various additive packages.
The data was then compared to the internal pressure data that was collected to analyze and determine the best overall additive package.
Base Lining Your Extruder
When a new extruder is installed, or a new screw mounted in an existing machine, do you know what the expected throughput rate is going to be? You should. If you don’t baseline your extruder, then how are you going to set realistic expectations for its performance? If extrusion screws are designed properly, they typically will be able to withstand the maximum torque available from the extruder and the resin being processed. The extruder should operate at approximately 90% of its full available torque, based on 100% pellet feedstock, which typically will be the worst-case scenario. By using today’s barrier screw technology, higher throughput rates, lower melt temperatures, and better power efficiencies can be obtained. This article will provide some basic insight to help processors to determine if they are obtaining the maximum production rates from their extruders, providing that they have adequate downstream cooling and handling equipment in the extrusion system.
Comparison of two different cooling methods for extrusion
1. The study compared the power consumption of air cooling versus water cooling for an extrusion process using four different resins.
2. Water cooling used slightly more energy than air cooling for all resins, with the greatest difference seen in PET where water cooling used 80% more energy.
3. Air cooling is recommended for dedicated processes as it provides sufficient cooling with less energy use than water cooling, however the screw design must match the resin to avoid excessive heating or cooling needs.
Empirical evaluation of different groove feed screw geometries
Plasticization rates can be greatly increased with the use of grooved feed extrusion. Grooved feed extruders can be used in a wide range of extrusion processes for higher output rates. This technology has doubled plasticization rates for some resins and processes as compared to smooth bore extruders.
This paper will compare the performance of three different screw geometries while processing fractional melt HDPE. One of the main methods of evaluation will be the comparison of internal pressure profiles over the entire length of the screw at eleven different locations down the length of the barrel at two L/D apart.
The effects of running different barrel temperature profiles for various resins
The effects of running different barrel temperature profiles for various resinsR&B Plastics Machinery
Differences in solids conveying, screw pressure profile generation, output, motor energy required, will vary between resins, barrel temperature profiles, and resin preheat temperatures, on a single stage low compression barrier screw design.An experimental investigation into melt pump performance
This document summarizes an experimental investigation into melt pump performance using three different resins. Key findings include:
1. Melt pump efficiency and output decreased as discharge pressure increased, and efficiency was higher for stiffer resins which experienced less backflow. Stiffer HDPE had the highest efficiency while softer PS had the lowest.
2. Higher discharge pressures and pump speeds increased melt temperature. PP had the highest melt temperatures, followed by HDPE then PS.
3. Stiffer resins and higher pressures led to higher motor amperage requirements. Pump sizing should account for resin properties and system pressure differentials.
General Extruder Audit Information
From time to time it is necessary to do a complete an audit on the condition of an extruder to make sure that it is operating in top condition for maximum effectiveness and efficiency. The following some general information that should be considered to accomplish a good Extruder Audit.
6. nanocomposites a single screw mixing study of nanoclay filled polypropylene
6. nanocomposites a single screw mixing study of nanoclay filled polypropyleneR&B Plastics Machinery
An experimental investigation into solids conveying
1. An experimental study compared the performance of an extruder with a single-piece barrel and integral feedport design to a standard two-piece barrel configuration.
2. Testing was conducted using two resins (HDPE and PP) across a range of screw speeds.
3. Results showed the integral design produced higher output rates and melt temperatures for both resins compared to the standard configuration, with a more significant increase seen for PP.
4. The integral design improved solids conveying by increasing heat transfer to the feed zone, raising temperatures and the coefficient of friction between pellets and barrel wall.
Extrusion Screws for Thermoplastic Composites
There are two different areas of screw design for thermoplastic composites: the screw
design which is being used to make the thermoplastic compound and the screw
design which is used to process the compounded thermoplastic. This paper
mainly discusses the latter of the two types, but many of the issues are pertinent to both.
More from R&B Plastics Machinery (20)
Extruder or Injection Molding Machine Startup and Shutdown Article
Extruder or Injection Molding Machine Startup and Shutdown Article
New and Improved Screw Technology for Processing INGEO™ PLA
New and Improved Screw Technology for Processing INGEO™ PLA
Comparison of two different cooling methods for extrusion
Comparison of two different cooling methods for extrusion
Empirical evaluation of different groove feed screw geometries
Empirical evaluation of different groove feed screw geometries
The effects of running different barrel temperature profiles for various resins
The effects of running different barrel temperature profiles for various resins
An experimental investigation into melt pump performance
An experimental investigation into melt pump performance
6. nanocomposites a single screw mixing study of nanoclay filled polypropylene
6. nanocomposites a single screw mixing study of nanoclay filled polypropylene
An experimental investigation into solids conveying
An experimental investigation into solids conveying