This document provides information on moulding processes and materials used in a foundry workshop. It discusses the different types of metals used in casting like ferrous, non-ferrous, and alloy metals. It also describes the various types of sand used for moulding like green sand, dry sand, facing sand, parting sand, and core sand. The document outlines the tools and equipment used in moulding like moulding boxes, rammers, riddles, and patterns. It also explains the steps involved in mould making, melting metals, fitting castings, and inspecting the final products.
1. A pattern is a replica of the object to be cast that is used to prepare the cavity in the mold into which molten material will be poured.
2. There are several types of patterns used in foundries depending on the casting requirements, including solid, split, match plate, cope and drag, loose piece, gated, sweep, skeleton, and follow board patterns.
3. Match plate patterns are well-suited for mass production as they allow for highly automated molding with minimal manual work required.
The metal casting process involves melting metal and pouring it into a mold to solidify into the shape of the mold cavity. Key steps include pattern making to create a physical model, core making to form interior surfaces, molding to prepare the mold, melting and pouring the molten metal, cleaning the casting, and inspecting the final product. Various sands are used in the molding process and properties like permeability and strength are important. The gating system delivers molten metal to the mold cavity uniformly during solidification. Foundries produce metal castings using furnaces and casting can have defects from stresses, shrinkage, gas pores, or issues with the mold material.
This document discusses metal casting processes and patterns used in sand mold casting. It provides information on the basic steps of the casting process, including melting metal, pouring it into a mold, allowing it to solidify, and removing the casting. It classifies casting processes and describes sand mold casting in detail. This includes the use of patterns to form cavities in molds, common pattern materials like wood and metal, and different types of patterns such as single-piece, two-piece, loose-piece, and multi-piece patterns. Gating systems and cores are also discussed.
Metal casting involves pouring liquid metal into a mold to produce parts of a desired shape. The key steps are melting metal to create a liquid, pouring it into a mold to achieve a solid shape as it cools and extracts heat, and then removing the solidified part from the mold. The quality of castings depends on factors like the flow of molten metal into the mold, the solidification and cooling process, and the type of mold material used. Common casting methods include sand casting, die casting, and investment casting.
Various types of melting furnaces are used in foundries depending on the metal and quantity. The main furnaces described are the cupola furnace and blast furnace. The cupola furnace is used to melt scrap metal and pig iron to produce cast iron. It consists of a refractory lined steel shell and uses coke as fuel with forced air. Charges of iron, coke, flux and alloys are loaded through the top and molten metal is tapped from the bottom.
This document discusses sheet metal operations and core manufacturing in casting. It defines cores as models of interior surfaces that are inserted into molds. Cores require supports like chaplets to hold them in position. The document outlines core parts, types, characteristics, functions and manufacturing. Cores are made of sand or metal and can be horizontal, vertical, balanced or hanging depending on their shape and position in molds. Core boxes are used to form cores and come in types like half, split, dump and loose piece. Core prints secure cores and must withstand forces from the molten metal. The document provides equations and guidelines for proper core print sizing.
1. A pattern is a replica of the object to be cast that is used to prepare the cavity in the mold into which molten material will be poured.
2. There are several types of patterns used in foundries depending on the casting requirements, including solid, split, match plate, cope and drag, loose piece, gated, sweep, skeleton, and follow board patterns.
3. Match plate patterns are well-suited for mass production as they allow for highly automated molding with minimal manual work required.
The metal casting process involves melting metal and pouring it into a mold to solidify into the shape of the mold cavity. Key steps include pattern making to create a physical model, core making to form interior surfaces, molding to prepare the mold, melting and pouring the molten metal, cleaning the casting, and inspecting the final product. Various sands are used in the molding process and properties like permeability and strength are important. The gating system delivers molten metal to the mold cavity uniformly during solidification. Foundries produce metal castings using furnaces and casting can have defects from stresses, shrinkage, gas pores, or issues with the mold material.
This document discusses metal casting processes and patterns used in sand mold casting. It provides information on the basic steps of the casting process, including melting metal, pouring it into a mold, allowing it to solidify, and removing the casting. It classifies casting processes and describes sand mold casting in detail. This includes the use of patterns to form cavities in molds, common pattern materials like wood and metal, and different types of patterns such as single-piece, two-piece, loose-piece, and multi-piece patterns. Gating systems and cores are also discussed.
Metal casting involves pouring liquid metal into a mold to produce parts of a desired shape. The key steps are melting metal to create a liquid, pouring it into a mold to achieve a solid shape as it cools and extracts heat, and then removing the solidified part from the mold. The quality of castings depends on factors like the flow of molten metal into the mold, the solidification and cooling process, and the type of mold material used. Common casting methods include sand casting, die casting, and investment casting.
Various types of melting furnaces are used in foundries depending on the metal and quantity. The main furnaces described are the cupola furnace and blast furnace. The cupola furnace is used to melt scrap metal and pig iron to produce cast iron. It consists of a refractory lined steel shell and uses coke as fuel with forced air. Charges of iron, coke, flux and alloys are loaded through the top and molten metal is tapped from the bottom.
This document discusses sheet metal operations and core manufacturing in casting. It defines cores as models of interior surfaces that are inserted into molds. Cores require supports like chaplets to hold them in position. The document outlines core parts, types, characteristics, functions and manufacturing. Cores are made of sand or metal and can be horizontal, vertical, balanced or hanging depending on their shape and position in molds. Core boxes are used to form cores and come in types like half, split, dump and loose piece. Core prints secure cores and must withstand forces from the molten metal. The document provides equations and guidelines for proper core print sizing.
This presentation is the basic of engineering materials. More presenetation will be added soon. If you like the work, please click on like button and do share. Thanks
The ceramic molding process involves making a mold from refractory ceramic materials that can withstand high temperatures. To make the mold, a slurry of silica grains, ethyl silicate, water, alcohol and a gelling agent is poured around a pattern. The mold is then fired to harden it and burn off unwanted materials, producing microcracks that allow permeability and collapsibility. Once assembled, the mold can be preheated and used to cast molten metals. Compared to investment casting, ceramic molds provide similar surface finish and intricacy but with reduced machining needs, shorter lead times, and ability to cast at various sizes and metals.
The document provides an overview of the sand casting process in 13 steps:
1. Mix sand and create molds using patterns.
2. Place pattern in bottom mold and compact sand.
3. Add top mold and fill with compacted sand.
4. Remove pattern to leave a cavity in the sand.
5. Pour molten metal into the mold.
6. Allow metal to cool and harden.
7. Break apart mold and remove the new cast part.
Gravity die casting involves melting an alloy of zinc and aluminum and pouring it into an open steel mold. The mold is then turned upside down and tapped to release the finished casting. Common items made through gravity die casting include toasters, lawnmowers, and car wheel rims.
Welding is a process that joins materials by melting them together with heat. There are several common types of welding including stick welding, MIG welding, TIG welding, and flux-cored arc welding. Welding requires certain safety equipment like a face shield, gloves, and protective clothing to avoid burns. Different types of welding rods are used for various materials and situations. Proper equipment is also needed like a welding machine, electrode holders, cables, and accessories. Laser beam and electron beam welding are advanced techniques that use concentrated light sources. Gas welding involves burning fuel gases with oxygen to produce a flame hot enough to melt metals. Forge welding is an ancient solid-state process that joins metals by heating and hammering them
Smith forging, also called flat die or open die forging, uses simple flat-faced dies and stock tooling to produce workpieces with less accuracy than impression or closed die forging. Impression die forging uses cavities in specially prepared dies to produce forged shapes in large quantities through drop, press, or machine forging. Closed die forging places a heated workpiece on a lower die while an upper die forces the metal to fill die contours. Hand forging shapes small forgings through hammering heated metal on anvils while power hammers and presses are used to forge larger parts through blows or squeezing.
Die casting is a process where molten metal is injected into a steel die under high pressure to form complex shapes. Common metals used include aluminum, magnesium, and copper alloys. The die is made of steel and consists of two halves, with one half fixed and the other movable. During die casting, molten metal is injected into the die cavity using pressures up to 9,800 psi and solidifies into the final part. Die casting allows for high production rates and close dimensional tolerances of the parts produced.
The document provides information on metal casting processes including definitions of key terms. It discusses the basic steps of metal casting which include making a pattern, preparing molds and cores, melting metal, pouring the molten metal into molds, solidification and cooling, removing and finishing the casting. Key sections include the foundry process, casting terms, pattern making, molding materials, melting and pouring, solidification, inspection and applications of casting.
Ferrous metals are metals that contain iron, such as steel which is an alloy of iron and carbon. The amount of carbon determines the properties and applications of different types of ferrous metals. Pig iron contains a high amount of carbon (2-4%) and is very hard and brittle. It is used to make steel. Cast iron also contains 2-4% carbon and is strong under compression. Wrought iron contains a very low amount of carbon and is tough and malleable. Steel contains 0.15-1.5% carbon and includes low, medium, and high carbon varieties with different properties. Alloy steels like stainless steel add other elements like chromium for improved properties such as corrosion resistance. Fer
A pit furnace is constructed by digging a pit and building a furnace structure within it. The furnace body is made of steel plates lined with ceramic fiber insulation. It has a lid with a central fan for circulating gases. Pit furnaces can be used to melt metals by placing crucibles containing metal inside. Coke fuel is burned to heat the furnace to the desired temperature for processes like carburizing, hardening, annealing, and nitriding steel parts. Pit furnaces provide flexibility, economic operation, and precision for heat treating large loads.
The document provides information on various forming processes including rolling, extrusion, shearing, spinning, deep drawing, and forging. It describes the basic principles, key advantages, common materials used, and brief histories for each process. Rolling is used to reduce thickness and increase length of materials like metals. Extrusion forces pre-heated material through a die to form a constant cross-section. Shearing uses blades to make straight cuts in sheet metal. Spinning forms tubular parts by stretching sheet material against a rotating form. Deep drawing stretches sheet metal into cups or pans using a punch and die. Forging shapes heated metal using dies or hammers to develop strength.
The document describes four main methods for molding sand in foundry processes: bench molding, floor molding, pit molding, and machine molding. Bench molding involves molding on a workbench, floor molding is used for larger molds that cannot fit on a bench, and pit molding is for very large molds dug into the floor. Machine molding uses machines rather than manual labor to perform molding operations like ramming sand faster and more consistently compared to the other methods. Common machine molding techniques include jolt machines, squeeze machines, jolt-squeeze machines, and sand slingers.
This document discusses sheet metal forming processes. Sheet metal forming takes a flat sheet of metal and uses mechanical forces to alter its shape. There are two main categories of sheet metal operations on a press: shearing/cutting operations and forming operations. Shearing operations like punching, blanking, and notching stress the metal beyond its strength limit. Forming operations like bending, drawing, spinning, and flanging mechanically deform the metal into the desired shape without breaking it. An example given is the process used to form aluminum cans.
This Presentation gives the information of Manufacturing process-1 of Mechanical Engineering course as per VTU Syllabus. Please write to me at: hareeshang@gmail.com for suggestions and criticisms.
Disclaimer:
Contents are taken from several text books and compiled for academic purposes only. Author doesn't hold the copyright for the contents used in this presentation.
This document provides information on various metal casting processes. It discusses the history of casting and defines the basic casting process as pouring liquid metal into a mold to solidify. It describes the main features of casting like molds, risers, gates, and cores. It categorizes casting processes as open mold or closed mold casting. It further classifies casting into expandable mold casting like sand casting and investment casting, and permanent mold casting like die casting and centrifugal casting. For each process, it provides details on the mold material, advantages, disadvantages and recommended applications. It emphasizes the importance of selecting the right casting process based on the alloy, shape, tolerance and cost requirements of the final part.
This document discusses composite materials. It defines a composite material as a combination of two or more materials that results in improved properties over the individual components. Composites offer advantages like high strength and stiffness combined with low density. The document outlines different types of composites including natural, particulate, and cast metal particulate composites. It also discusses advantages such as high strength-to-weight ratio, disadvantages like anisotropic properties, and applications in industries like aerospace, automotive, and construction.
very useful for 1st year engineering student who studying the workshop manufacturing practices. in this ppt pdf all about casting viz. pattern, mould, different type of sand, riser design, different casting process and defects in casting is given in short.
This document provides an overview of various manufacturing processes, with a focus on metal casting processes. It discusses the steps in metal casting including creating a mould, pouring molten metal, and removing the casting. It describes important casting products and the advantages and limitations of casting. Key terms related to casting like pattern, parting line, and riser are defined. Different pattern materials and allowances are also covered. Moulding materials like green sand and core sand are explained. Finally, other metal forming processes like die casting are introduced.
The document describes the steps involved in the sand casting process. It begins by making a pattern from materials like wood, metal, or plastic. Sand mixtures are then prepared for molding and cores. The mold and cores are formed using the pattern. Metal is melted and poured into the mold, where it solidifies into a casting. The casting is then cleaned, inspected for defects, heat treated, and inspected again before shipping. Various types of patterns, materials for patterns, and allowances made on patterns are also described.
This presentation is the basic of engineering materials. More presenetation will be added soon. If you like the work, please click on like button and do share. Thanks
The ceramic molding process involves making a mold from refractory ceramic materials that can withstand high temperatures. To make the mold, a slurry of silica grains, ethyl silicate, water, alcohol and a gelling agent is poured around a pattern. The mold is then fired to harden it and burn off unwanted materials, producing microcracks that allow permeability and collapsibility. Once assembled, the mold can be preheated and used to cast molten metals. Compared to investment casting, ceramic molds provide similar surface finish and intricacy but with reduced machining needs, shorter lead times, and ability to cast at various sizes and metals.
The document provides an overview of the sand casting process in 13 steps:
1. Mix sand and create molds using patterns.
2. Place pattern in bottom mold and compact sand.
3. Add top mold and fill with compacted sand.
4. Remove pattern to leave a cavity in the sand.
5. Pour molten metal into the mold.
6. Allow metal to cool and harden.
7. Break apart mold and remove the new cast part.
Gravity die casting involves melting an alloy of zinc and aluminum and pouring it into an open steel mold. The mold is then turned upside down and tapped to release the finished casting. Common items made through gravity die casting include toasters, lawnmowers, and car wheel rims.
Welding is a process that joins materials by melting them together with heat. There are several common types of welding including stick welding, MIG welding, TIG welding, and flux-cored arc welding. Welding requires certain safety equipment like a face shield, gloves, and protective clothing to avoid burns. Different types of welding rods are used for various materials and situations. Proper equipment is also needed like a welding machine, electrode holders, cables, and accessories. Laser beam and electron beam welding are advanced techniques that use concentrated light sources. Gas welding involves burning fuel gases with oxygen to produce a flame hot enough to melt metals. Forge welding is an ancient solid-state process that joins metals by heating and hammering them
Smith forging, also called flat die or open die forging, uses simple flat-faced dies and stock tooling to produce workpieces with less accuracy than impression or closed die forging. Impression die forging uses cavities in specially prepared dies to produce forged shapes in large quantities through drop, press, or machine forging. Closed die forging places a heated workpiece on a lower die while an upper die forces the metal to fill die contours. Hand forging shapes small forgings through hammering heated metal on anvils while power hammers and presses are used to forge larger parts through blows or squeezing.
Die casting is a process where molten metal is injected into a steel die under high pressure to form complex shapes. Common metals used include aluminum, magnesium, and copper alloys. The die is made of steel and consists of two halves, with one half fixed and the other movable. During die casting, molten metal is injected into the die cavity using pressures up to 9,800 psi and solidifies into the final part. Die casting allows for high production rates and close dimensional tolerances of the parts produced.
The document provides information on metal casting processes including definitions of key terms. It discusses the basic steps of metal casting which include making a pattern, preparing molds and cores, melting metal, pouring the molten metal into molds, solidification and cooling, removing and finishing the casting. Key sections include the foundry process, casting terms, pattern making, molding materials, melting and pouring, solidification, inspection and applications of casting.
Ferrous metals are metals that contain iron, such as steel which is an alloy of iron and carbon. The amount of carbon determines the properties and applications of different types of ferrous metals. Pig iron contains a high amount of carbon (2-4%) and is very hard and brittle. It is used to make steel. Cast iron also contains 2-4% carbon and is strong under compression. Wrought iron contains a very low amount of carbon and is tough and malleable. Steel contains 0.15-1.5% carbon and includes low, medium, and high carbon varieties with different properties. Alloy steels like stainless steel add other elements like chromium for improved properties such as corrosion resistance. Fer
A pit furnace is constructed by digging a pit and building a furnace structure within it. The furnace body is made of steel plates lined with ceramic fiber insulation. It has a lid with a central fan for circulating gases. Pit furnaces can be used to melt metals by placing crucibles containing metal inside. Coke fuel is burned to heat the furnace to the desired temperature for processes like carburizing, hardening, annealing, and nitriding steel parts. Pit furnaces provide flexibility, economic operation, and precision for heat treating large loads.
The document provides information on various forming processes including rolling, extrusion, shearing, spinning, deep drawing, and forging. It describes the basic principles, key advantages, common materials used, and brief histories for each process. Rolling is used to reduce thickness and increase length of materials like metals. Extrusion forces pre-heated material through a die to form a constant cross-section. Shearing uses blades to make straight cuts in sheet metal. Spinning forms tubular parts by stretching sheet material against a rotating form. Deep drawing stretches sheet metal into cups or pans using a punch and die. Forging shapes heated metal using dies or hammers to develop strength.
The document describes four main methods for molding sand in foundry processes: bench molding, floor molding, pit molding, and machine molding. Bench molding involves molding on a workbench, floor molding is used for larger molds that cannot fit on a bench, and pit molding is for very large molds dug into the floor. Machine molding uses machines rather than manual labor to perform molding operations like ramming sand faster and more consistently compared to the other methods. Common machine molding techniques include jolt machines, squeeze machines, jolt-squeeze machines, and sand slingers.
This document discusses sheet metal forming processes. Sheet metal forming takes a flat sheet of metal and uses mechanical forces to alter its shape. There are two main categories of sheet metal operations on a press: shearing/cutting operations and forming operations. Shearing operations like punching, blanking, and notching stress the metal beyond its strength limit. Forming operations like bending, drawing, spinning, and flanging mechanically deform the metal into the desired shape without breaking it. An example given is the process used to form aluminum cans.
This Presentation gives the information of Manufacturing process-1 of Mechanical Engineering course as per VTU Syllabus. Please write to me at: hareeshang@gmail.com for suggestions and criticisms.
Disclaimer:
Contents are taken from several text books and compiled for academic purposes only. Author doesn't hold the copyright for the contents used in this presentation.
This document provides information on various metal casting processes. It discusses the history of casting and defines the basic casting process as pouring liquid metal into a mold to solidify. It describes the main features of casting like molds, risers, gates, and cores. It categorizes casting processes as open mold or closed mold casting. It further classifies casting into expandable mold casting like sand casting and investment casting, and permanent mold casting like die casting and centrifugal casting. For each process, it provides details on the mold material, advantages, disadvantages and recommended applications. It emphasizes the importance of selecting the right casting process based on the alloy, shape, tolerance and cost requirements of the final part.
This document discusses composite materials. It defines a composite material as a combination of two or more materials that results in improved properties over the individual components. Composites offer advantages like high strength and stiffness combined with low density. The document outlines different types of composites including natural, particulate, and cast metal particulate composites. It also discusses advantages such as high strength-to-weight ratio, disadvantages like anisotropic properties, and applications in industries like aerospace, automotive, and construction.
very useful for 1st year engineering student who studying the workshop manufacturing practices. in this ppt pdf all about casting viz. pattern, mould, different type of sand, riser design, different casting process and defects in casting is given in short.
This document provides an overview of various manufacturing processes, with a focus on metal casting processes. It discusses the steps in metal casting including creating a mould, pouring molten metal, and removing the casting. It describes important casting products and the advantages and limitations of casting. Key terms related to casting like pattern, parting line, and riser are defined. Different pattern materials and allowances are also covered. Moulding materials like green sand and core sand are explained. Finally, other metal forming processes like die casting are introduced.
The document describes the steps involved in the sand casting process. It begins by making a pattern from materials like wood, metal, or plastic. Sand mixtures are then prepared for molding and cores. The mold and cores are formed using the pattern. Metal is melted and poured into the mold, where it solidifies into a casting. The casting is then cleaned, inspected for defects, heat treated, and inspected again before shipping. Various types of patterns, materials for patterns, and allowances made on patterns are also described.
This document discusses sand casting and provides details on:
- The types of casting sand including green sand, water glass sand, and resin sand.
- The key properties of casting sand such as strength, permeability, grain size, thermal stability, and reusability.
- Common casting defects related to issues with the sand mold like sand blow, pinholes, and sand wash.
- How to test sand properties including measuring moisture content, clay content, and grain size distribution.
The document discusses manufacturing processes and sand casting. It defines manufacturing as making goods by hand or machinery. Manufacturing processes are classified into casting, joining, forming, sheet metal work, plastics processing, machining, powder metallurgy, heat treatment, and assembly. Sand casting is described as producing metal parts by pouring molten metal into sand molds. Molds are made using patterns, cores, and molding machines in a foundry. Sand casting can make complex shapes and is used to produce parts in large quantities.
This document discusses various casting processes and related topics. It begins with definitions of casting and different casting processes like permanent mold casting, investment casting, centrifugal casting, continuous casting, and sand casting. For each process, it provides details on the process, applications, advantages and limitations. It also discusses topics like molding sands, furnaces used in foundries like cupolas, electric arc furnaces, and induction furnaces. The document aims to provide an overview of casting processes and technologies.
This document discusses manufacturing technology processes, specifically focusing on sand casting. It defines sand casting as a process for producing metal parts by pouring molten metal into a mold cavity made of sand. Key aspects covered include:
- Types of patterns used to form the mold cavity
- Materials and properties of moldsand
- Methods for making cores to create internal cavities
- Baking and curing of cores in core ovens
- Defects that can occur in sand casting and how properties of moldsand and cores can impact the casting quality.
This document discusses manufacturing technology processes, specifically focusing on sand casting. It defines sand casting as a process for producing metal parts by pouring molten metal into a mold cavity made of sand. Key aspects covered include:
- Types of patterns used to form the mold cavity
- Materials and properties of moldsand
- Methods for making cores to create internal cavities
- Baking and curing of cores in core ovens
- Defects that can occur in sand castings
This document provides information on various aspects of sand casting, including:
1. It describes the key parts of a sand casting like the molding flask, cope, drag, parting line, pouring basin, sprue, runner, and gate.
2. It outlines the basic sand casting process steps of pattern making, core making, molding, melting and pouring, solidification, and shakeout and cleaning.
3. It discusses different types of molding sands and their properties, as well as how to test sand properties.
4. It covers common pattern types, materials, and allowances given to patterns to account for shrinkage and drafting.
5. It provides an overview
This document provides an overview of sand casting, including:
1) Sand casting is a process where molten metal is poured into a sand mold cavity and solidifies. It can be used to manufacture metal or non-metal parts like iron and aluminum.
2) Sand casting has a long history dating back thousands of years and was widely used in ancient China. Modern developments improved molding speed and efficiency.
3) Sand casting has advantages like low costs and ability to produce complex shapes, though it also has disadvantages like poor surface finish and accuracy. Future improvements could enhance casting efficiency and quality control.
This document discusses the properties and composition of molding materials used in metal casting. It outlines 11 key properties molding materials must have including refractoriness, permeability, green strength, dry strength, and collapsibility. Common molding materials are described as sand, with silica sand being most widely used. The composition of molding sand is outlined as consisting of a base sand like silica, a binder like clay, and moisture. Factors that affect mold quality like moisture content, grain size, and shape are also summarized.
This document summarizes various metal casting processes and techniques. It discusses sand casting and the key components of sand molds like the flask, pouring basin, sprue, runners, and risers. It also covers cores, moulding sands, patterns, moulding machines, melting furnaces, and common defects in sand casting. Testing methods for moulding sands like moisture content, clay content, and permeability are also summarized.
The document discusses the various steps involved in the casting process including making patterns and cores, making molds, melting and pouring metal, and finishing processes. It describes different types of patterns such as loose patterns, gated patterns, and cope and drag patterns. It also discusses various molding methods like green sand molding, dry sand molding, and loam sand molding. Key mold properties like strength, permeability, and refractory nature are explained. Methods of testing mold properties like clay content, moisture content, and permeability are also summarized.
The document discusses various metal casting processes and techniques. It covers topics like sand casting, pattern making, moulding sand, cores, melting furnaces, and special casting processes. Sand casting is introduced as one of the most common casting methods where a sand mould is used. Different types of patterns and allowances are described. The properties and testing of moulding sands like green sand and dry sand are outlined. Special casting techniques like shell mould casting and investment casting that use non-sand moulds are also summarized briefly.
The document discusses the casting process. It begins by describing how a liquid material is poured into a mold cavity to take its shape, then solidifies. This allows for complex geometries and net-shape production. Casting can be done with any material that melts and is suited for mass production. Common casting defects and their causes are also outlined.
THIS STUDY MATERIAL IS RELATED WITH ONE OF THE TYPE OF MANUFACTURING PROCESSES CALLED CASTING.THIS IS VERY GOOD MATERIAL . CASTING IS BASIC MANUFACTURING PROCESS.EVERY MECHANICAL ENGINEERING STUDENT MUST KNOW CASTING PROCESS,ITS TYPES ,PATTERN ,PATTERN TYPES,PATTERN MAKING ALLOWANCES,DIE CASTING INVESTMENT CASTING.ALL THESE POINTS ARE COVERED IN THIS PPT.
IIIE SECTION A MANUFACTURING TECHNOLOGY NOTES 3.sand preparation and mould m...Bhaskar Nagarajan
Sand preparation and mould making involves using moulding sand composed mainly of silica to make moulds for casting metals. Natural sand collected from rivers and lakes can be used directly as green sand or processed further with binders like bentonite to make synthetic sand. Different sand properties like permeability, cohesiveness and plasticity are required for moulds. Common mould types include green sand, skin dry, and dry sand moulds made using natural moisture, partial drying, or no moisture respectively. Moulds are produced using bench, floor, plate, pit and machine moulding methods depending on the size and required production quantity of the casting.
This pdf includes basics of foundry- introduction, advantages over other manufacturing processes, equipment's(tools), types of moulding sands and properties of moulding sands.
by:
JUKANTI VISHWAS
M.TECH
(Research Scholar)
This document provides information on metal casting processes and patterns. It discusses the different types of patterns used such as single piece patterns, shell patterns, and wax patterns. It also covers the various pattern allowances including shrinkage allowance, machining allowance, draft allowance, and others. The document discusses the properties and types of molding sands used including green sand, dry sand, facing sand, loam sand, backing sand, parting sand and core sand. It provides details on the requirements for molding materials including refractoriness, permeability, green strength and others.
Unit 1 manufacturing technology I Metal casting processGopinath Guru
This document discusses various metal casting processes and techniques. It covers topics like sand casting, pattern making, molding sand properties, core making, and casting defects. Sand casting involves pouring molten metal into an expandable sand mold and allowing it to solidify. Different types of sand and patterns are used depending on the application. Properties of molding sand like permeability and strength are important. Cores are used to create internal cavities and angles in castings.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
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.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
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
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.
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.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
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.
2. INTRODUCTION
Sand is the principle basic moulding material used by the foundry
man whether. It is for iron steel Non-ferrous or light alloy casting.
Original natural day mixed with the grain of silica sand. These
silica and are known by the terms sea – sand, river sand etc. The
best term is “silica sand”. The green of silica sand are very
refractory. They can be heated to a high temperature before their
surfaces begin to mill and cause the grains to stick together, but
the impurities found with some of them such as Mica, Felspars
and Alkaline.
3. The principle characteristics of the process the production of casting with a high
standard of surface finish and dimensional accuracy a high rate of production
from a small floor space and a mark reduction in the amount of material such as
sand and box parts.
FERROUS METALS – Those metal which contain iron as a chief constitute
called ferrous metals .
Example – Pig iron, Cost iron, Mild steel, Wrought iron, Stainless steel etc.
NON – FERROUS METALS - Those metal which contain other metal to
leave iron as a chief constitute called non- ferrous metals.
Example – Copper, Aluminium, Zinc, Lead, Tin etc
ALLOY METALS – when two or three metals melt together then the
resulting metal called Alloy metals.
4. TYPE OF SAND USED FOR DIFFERENT TYPE OF COSTING
AND METALS
While the chemical composition of sand gives a valuable guide to its refractory
character the primary factors in determining the working properties of sand are
following.
1. Shape, size distribution and surface character of the grain.
2. The amount and type of clay.
3. The moisture contend porosity or permeability.
The permeability of the mass on the flow ability and deformation value of sand.
1. For steel casting is used 93% Silica sand, 3.5% Bentonite, 0.5% Dextrin 3%
water.
2. Green Sand – Sand is green or undried condition casting into green sand
undried mould is common practice for majority of small and medium size
ferrous and non ferrous casting.
5. DRY SAND – This term indicates that moulding sand which was orginally having
excess moisture content but the same has been evaporated from it by drying its
mould in a suitable oven.
FACING SAND – It is also known as fat sand. These terms are used for that sand
which forms the face of the mould, i.e., rammed around the pattern surface. It is
nothing but the fresh prepared and well tempered foundry sand. Initial coating
around the pattern surface is given by this sand and the remainder of the flask is
filled with floor sand to effect economy.
PARTING SAND – This term denotes that sand which is sprinkled on the pattern
and the parting surfaces of the mould so that the sand mass of one flask does not
stick to that of the other or to the pattern. The ‘burnt’ sand and dry silica sand are
used for this purpose.
6. CORE SAND – The sand which carries a high silica content and is used for
making cores is known as core sand.
OIL SAND – Silica sand using oil binders is known as oil sand.
MOLASSES SAND – This term denotes the denotes the sand which carries
molasses as binder. It is very useful for making moulds of small castings having
intricate shapes and thin sections. Also it is used as core sand.
11. Melting Tools -
a. Crucible – for melting the metal in the crucible ferrous and non- ferrous
metals.
b. Crucible Tong – It is used for lifting the crucible from pit furnace.
c. Crucible career – It is used for carried the crucible and pouring the metal in
mould.
12. d. Rocking rod – Titening the hard cake in the fit ferness by rocking rod.
13. Fitting of the casting
Or
Cleaning of the casting
Hand tools are used :-
1. Hammer 2. Chisel
3. Hacksaw 4. Wire Brush
14. Machines are used
1. Tumbling - In this method the castings to be cleaned are placed inside large
steel barrels, together with a number of small cast iron pieces called stars.
Both ends of the barrel are closed and the same rotated along a horizontal or
inclined axis for about half an hour or so. The casting during this period of
rotation, rub against each other and the stars to obtain a clean surface, free of
sand and scale. It is very efficient method of cleaning and further
requirements of grinding etc. Are minimised considerably.
2. Shot blasting – This method is similar to sand blasting, but here Metallic
Abrasives are fed into the air blast instead of the sand grains. They may
either be in the form of shots or cut-wires. The common materials used as
abrasives are malleable iron, cast steel and chilled iron. The main advantage
of this process is that it provides a very fast rate of cleaning.
15. c. Hydroblasting – In this process a high velocity stream consisting of water sand is
thrown on to the casting surface with a speed of about 6000 meters per minute, to
strike the surface at an inclination of about 450 with it. This is also very effective
method.
FURNACES
a. BLAST FURNACE – It is for melting the iron ore. The output as pig iron
and steel with different process.
Input – Iron
Output – Pig iron
Fuel – Hard coke
16. b. Fit Furnace – It is only for ferrous and non – ferrous metals.
Fuel – Hard coke
c. Oil Fired Tilling Furnace – It is for ferrous and non – ferrous metals.
Fuel – Disel and Air
17. d. Cupola Furnace – It is only for pig iron and cast iron.
Input – Pig iron
Out put – Cast iron
Fuel – Hard coke
e. Electric are direct and Indirect Furnace – This furnace is used for steel casting
18. Melting Points of Metals
Pig iron or cast iron 1093 0 C - 1300 0 C
Steel 1563 0 C
Copper 1010 0 C – 10850 C
Aluminium 6600 C – 704 0 C
Zinc 419 0 C
Lead 322 0 C – 327 0 C
Tin 232 0 C – 267 0 C
19. Patterns :- A pattern may be defined as a Replica or Fascimile Model of the
desired casting which, when packed or embedded in a suitable moulding
material, produces a cavity called Mould.
This cavity, when filled with molten metal, produces the desired casting after
solidification of the poured metal. It is direct duplication, the pattern very
closely conforms to the shape and size of the desired casting, except for a few
variations due to the necessary allowances.
Types of Patterns
a. Solid Pattern -
21. e. Pattern with Loose - Pieces
f. Skeleton Pattern
g. Sweep Pattern
22. METAL PATTERN IS USED FOR MASS PRODUCTION
ALLUMINIUM VERY SOFT CHEAP AND LIGHT
Core and Core Making - A core box should be made which be made which
produce a core corresponding to the two prints on the pattern and circular hollow
section of the casting the core each half core box is then filled with molasses
sand and should be rammed and evenly.
A rein forcing wire may be placed in the core. The two holes of the box are then
closed together. Locating dowels ensuring correct matching. The open ends of
the core are finished off. By ramming tucking and making firm. The sand thus
rammed into the core box becomes comes compact mass of the require shape.
This sand shape or core must no be with drawn form the core box and so treated
that it can be handled place in the mould and fulfil its function in providing a
hollow casting.
The treatment of the core depends on the nature and types of sand used. The
majority of sand require that the core be dried or baked at a temperature of 520
of for a period of time 1 ½ hours to four according to the size.
26. Methods Used in Making The Mould
1. Pit moulding
2. Floor moulding
3. Bench moulding
4. Machine moulding
5. Plate moulding
6. Sweep moulding
The hole process of producing casting may be classified into Five stages
1. Pattern making
2. Moulding and Casting
3. Melting and Casting
4. Fitting of the casting
5. Testing and inspecting
27. Visual Inspection
1. Surface finishing
2. Casting thickness
3. Pressure test of casting
4. X- ray machine
5. Weight or Displacement testing
Loom Moulding process – Loam is a special strong and mixture often
containing a proportion of refactory fire clay. Which is used of moulding
heavy iron casting. The ingradients are milled in a heavy edge rammer mill
with sufficient water to form a mud. This is applied as a plaster or surface
layer to the rough structure of the mould which may be built of soft fire
bricks or dried 10 mm bricks. The wet 10mm must be sufficiently adhesive
to hold on to vertical surfaces without or pilling.
28. Precaution:-
1. First of all, we dig a pit of appropriate size with trowel.
2. We loose the sand and leveled the sand bed.
3. We pressed sand bed with help of wooden plank and smoothened it with
smoother.
29. Job No.-1
Object:- To make a Mould as given in the sketch below.
Material Used :- Green Sand, Dry Sand, Silica Sand, Loom Sand, Parting Sand,
Bentonite Clay, Cola Power and Graphite
Tools and Equipment Used :-
1) Moulding Box
2) Cleaner
3) Trowels
4) Solid Pattern
5) Pin Rammer
6) Round Rammer
7) Riddle
8) Runner Sprue
9) Moulding plate
10) Swab
30. 11) Spad
12) Wooden Smoother
Theory :- What is Moulding Shop and it uses.
Procedure :- Write point wise.