What is the function of the ejector pin?
Ejector pins help safely remove parts from molds after they have been made. Here are some tips on how to properly locate and use those pins. Ejector pins are the “bouncers” of the injection molding world. They let technicians apply a force to eject a part from the mold, and, in some cases, can leave marks.
The document discusses the key elements and design considerations of a gating system used in metal casting. A gating system includes components like the pouring basin, sprue, runners, gates, risers, and mould cavity. It aims to distribute molten metal with minimal turbulence, fill the mould cavity quickly, and establish favorable temperature gradients. Proper gating ratios and avoiding abrupt changes are important design factors. Common types of gates include parting line, top, and bottom gates.
Module 4
Design of components with casting considerations:
Pattern, mould, and parting line. Cored holes and machined holes. Identifying the possible and probable parting lines. Castings requiring special sand cores. Designing to obviate sand cores.
Welding considerations: requirements and rules, redesign of components for welding; case studies.
Text book: Harry Peck
Mould gating system for foundry and metal castingVaibhav Girdhar
The document discusses various manufacturing processes used in casting including molds, cores, gating systems, risers, and vent holes. It describes how molds are used to form the shape of cast parts and can be open or closed. Closed molds require cores and gating systems to define internal surfaces and direct the flow of molten metal. Properly designed gating systems, risers, and vent holes are important for filling molds completely and releasing air and gases to avoid defects in castings.
Common problems and treatment to pcb board drilling processrichard makervier
The document discusses common problems that occur during PCB board drilling and their treatments. It describes two main problems - drill bit breaking and via damage. For drill bit breaking, potential causes include excessive spindle deflection, incorrect drill bit selection, and improper operating parameters. Solutions involve checking the spindle, adjusting operating pressures and speeds, using the proper drill bit type, and reducing feed rates. For via damage, causes can be drilling without board clamping, incorrect drill bit length, or hand drilling. Solutions involve verifying drill bit length, clamping the board, checking parameters, and avoiding hand drilling when accuracy can't be ensured.
This document provides information about the sand casting process. It describes the key steps in sand casting which are mold making, clamping, pouring, cooling, removal, and trimming. It discusses mold components like core prints, vent holes, and risers. It explains the types of risers as open or blind risers. The document also outlines the main elements of a gating system and lists common tools used in sand casting by mold makers.
This document provides an introduction to casting processes. It discusses the basic steps involved, which include pouring molten metal into a refractory mold to take on its shape upon solidification. Different types of casting processes are classified, including sand casting where a sand mold is used. Patterns, properties of molding sand, and common molding techniques like bench, floor, pit and machine molding are also overviewed. Key advantages of casting include the ability to produce complex shapes from various metals in small or large quantities.
The document discusses the key elements and design considerations of a gating system used in metal casting. A gating system includes components like the pouring basin, sprue, runners, gates, risers, and mould cavity. It aims to distribute molten metal with minimal turbulence, fill the mould cavity quickly, and establish favorable temperature gradients. Proper gating ratios and avoiding abrupt changes are important design factors. Common types of gates include parting line, top, and bottom gates.
Module 4
Design of components with casting considerations:
Pattern, mould, and parting line. Cored holes and machined holes. Identifying the possible and probable parting lines. Castings requiring special sand cores. Designing to obviate sand cores.
Welding considerations: requirements and rules, redesign of components for welding; case studies.
Text book: Harry Peck
Mould gating system for foundry and metal castingVaibhav Girdhar
The document discusses various manufacturing processes used in casting including molds, cores, gating systems, risers, and vent holes. It describes how molds are used to form the shape of cast parts and can be open or closed. Closed molds require cores and gating systems to define internal surfaces and direct the flow of molten metal. Properly designed gating systems, risers, and vent holes are important for filling molds completely and releasing air and gases to avoid defects in castings.
Common problems and treatment to pcb board drilling processrichard makervier
The document discusses common problems that occur during PCB board drilling and their treatments. It describes two main problems - drill bit breaking and via damage. For drill bit breaking, potential causes include excessive spindle deflection, incorrect drill bit selection, and improper operating parameters. Solutions involve checking the spindle, adjusting operating pressures and speeds, using the proper drill bit type, and reducing feed rates. For via damage, causes can be drilling without board clamping, incorrect drill bit length, or hand drilling. Solutions involve verifying drill bit length, clamping the board, checking parameters, and avoiding hand drilling when accuracy can't be ensured.
This document provides information about the sand casting process. It describes the key steps in sand casting which are mold making, clamping, pouring, cooling, removal, and trimming. It discusses mold components like core prints, vent holes, and risers. It explains the types of risers as open or blind risers. The document also outlines the main elements of a gating system and lists common tools used in sand casting by mold makers.
This document provides an introduction to casting processes. It discusses the basic steps involved, which include pouring molten metal into a refractory mold to take on its shape upon solidification. Different types of casting processes are classified, including sand casting where a sand mold is used. Patterns, properties of molding sand, and common molding techniques like bench, floor, pit and machine molding are also overviewed. Key advantages of casting include the ability to produce complex shapes from various metals in small or large quantities.
Casting is a manufacturing process where a liquid material is poured into a mold and allowed to solidify. The solidified part takes the shape of the mold cavity. There are several steps involved including making the mold cavity, heating the material, pouring it into the mold, and allowing it to solidify. Casting can create complex structures economically and all types of materials can be cast. However, casting often requires further surface finishing and can result in defects from the process.
This document discusses various manufacturing processes and provides details about casting processes. It describes:
1) Casting as one of the earliest metal shaping techniques known to humans involving pouring molten metal into a refractory mold and allowing it to solidify.
2) The six basic steps in the casting process including creating a mold cavity, incorporating gating systems, filling with molten metal, and allowing the metal to cool.
3) Common molding sand types used in casting like green sand, dry sand, and loam sand.
Triangle Engineering is an Omani company that manufactures and provides scaffolding services. It has the largest scaffolding factory in Oman with an automated production line and monthly capacity of 1200 tons. Triangle Engineering offers scaffolding sales, manufacturing, erection, dismantling services and products including standards, ledgers, transoms, frames, and fittings/couplers. Its vision is to provide quality Omani scaffolding products and services to industries such as oil/gas, construction, petrochemicals, and shipbuilding.
Allied Moulded Empire series wall mount enclosures may be used where contractors are looking for an enclosure that is lighter in weight for easier installation and simple-to-access cabinet doors for easier service capability. Units feature optional 3-point latching cabinet doors or twist latches for convenience. For detailed information, visit: https://bit.ly/2PYWgQH
This document provides information on foundry processes and sand casting. It defines important casting terminology like flasks, drags, copes, patterns, and parting lines. It describes the tools used in sand mold making like molds, hammers, and trowels. It explains the procedure for making a sand mold in steps from preparing the bottom board and drag to applying facing sand in the mold cavity. It also defines different types of molds like green sand molds, dry sand molds, and skin dried molds. The document outlines properties of molding sand and types of patterns used in casting.
The document discusses metal casting processes. It provides an overview of casting technology and classifications of solidification processes. Specifically, it describes sand casting processes including mold materials, open and closed molds, gating systems, risers, heating metal, pouring, and solidification of pure metals and alloys. Sand casting involves using expendable molds made of sand to form a cavity that shapes molten metal.
Jigs and fixtures are production tools used to manufacture identical parts accurately and interchangeably. Jigs both hold and guide cutting tools, while fixtures only hold workpieces. Key advantages of jigs and fixtures include increased productivity, interchangeability, quality control, and cost reduction through standardized production. Their primary purposes are to reduce production costs while maintaining consistent quality and maximizing efficiency. Common types of jigs include template, plate, and drill jigs, while fixtures are used for milling, grinding and other operations.
Types of Pattern in Casting Process was explained in a detailed way.
For more information, visit https://mechanicalstudents.com/sand-casting-process-die-casting-shell-mold-casting-investment-casting-process/
This document discusses various pattern allowances that must be accounted for when designing casting patterns. It describes shrinkage allowance, which accounts for the contraction of metals as they cool from liquid to solid. It also mentions machining allowance to allow for removal of surface imperfections during machining. Draft allowance tapers the pattern for easy removal from the mold. Distortion allowance accounts for uneven shrinking that can warp irregularly shaped castings. Finally, shake allowance enlarges the pattern to compensate for the mold cavity expanding slightly when the pattern is rapped to help removal.
El sistema de junta de expansión ZB 200/400 es un sello elastomérico de EPDM extruido de una pieza con orificios integrales, unidos en una cama de epoxi de alta resistencia, diseñado para su uso en aplicaciones de plataformas de estacionamiento. El sistema resultante se sella a cada lado con un sellador de uretano, lo que da como resultado un sistema de unión extremadamente duradero y hermético.
This document describes the design and development of a drill jig and fixture. It includes:
1. A list of team members and an index of sections.
2. Descriptions of what jigs and fixtures are, and that the purpose of this project is to create a drill jig and fixture from mild steel to accurately drill duplicate parts.
3. A summary of the design process in PRO-E software and development process involving shaping, grinding, drilling, welding, and finishing the mild steel components.
4. Images of the completed drill jig and fixture from multiple angles.
This document discusses different types of jigs and fixtures used in manufacturing. It describes various elements of jigs like the jig body, feet, drill bush, and plate. It then lists and describes common types of jigs like boring jigs, drill jigs, and template jigs. It also discusses different types of fixtures like plate fixtures, angle plate fixtures, vice-jaw fixtures, and multi-station fixtures. Finally, it covers fixtures for specific machine operations like turning, milling, boring, and welding fixtures.
Cast steel has greater strength than cast iron and is used when components experience severe loading conditions. It exists in four ordinary grades for most applications and special grades for duty. Cast steel has higher strength, hardness, bending strength, and elasticity than cast iron, making it suited for components requiring these properties. However, it has higher melting points, contracts more during solidification, and is more difficult to cast than cast iron. Proper form design through techniques like generous riser usage, uniform wall thicknesses, and contraction ribs can prevent issues like shrinkage cavities and hot cracks during solidification.
Core and core prints and types of cores by polayya chintadaPOLAYYA CHINTADA
This document discusses cores used in metal casting processes. Cores are temporary structures inserted into molds that create hollow spaces or cavities in castings. The document defines cores and their purposes, provides examples, and describes different types of cores including green sand cores, dry sand cores, horizontal cores, vertical cores, hanging cores, balanced cores, and drop cores. It explains the functions and characteristics of cores and how they are used to form internal features in metal castings.
This document discusses patterns and their types used in casting manufacturing. It defines a pattern as a replica of the object to be cast, which is slightly larger to allow for shrinkage and machining. Nine types of patterns are described: single piece, split piece, loose piece, gated, match plate, sweep, skeleton, follow board, and shell patterns. Requirements for good patterns and considerations in pattern design are also outlined.
The document discusses various components involved in the casting process including flasks, patterns, mould cavities, pouring basins, sprues, runners, gates, rissers, vents and cores. It describes the functions of these components and different types of patterns, rissers, and gates. The key steps in the casting process are discussed such as solidification, shrinkage and grain growth. Methods to calculate the size of rissers including Chvorinov's rule, Caine's method and modulus method are also summarized.
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.
Tool & Die is a tried and true industry. It can also be one of the most intimidating if you don’t know how it is used or when to use it. This presentation is designed to unlock some of the mysteries of Tool & Die and give you a better understanding of its uses. View this presentation and learn when and how to leverage Tool & Die in your company. Whether you have been around Tool & Die for years or you are just getting started, this presentation will enhance your knowledge and help you with upcoming decisions.
What you'll learn by viewing the webcast:
- Definition of Tool & Die
- Ways stamping dies are classified
- Operations that can be performed with stamping dies
- Different types of parts that can be made with stamping dies
- Determining precision of die produced parts
- Ways to implement Tool & Die into your organization
The document discusses key terms related to casting processes:
- A flask is a metal or wood frame used to form molds, and can be a drag (lower) or cope (upper) depending on its position.
- A pattern is a replica of the final object that is used to form the mold cavity.
- A parting line divides the two molding flasks that make up the mold.
- Molding sand is a mixture of silica sand, clay, and moisture used to form molds.
Summary of stamping die skills -dgmf mold clamps co., ltdJasmineHL
The document provides information on stamping die skills and reasons for mold burst. It discusses the main points of continuous mold maintenance including maintenance of convex and concave dies, stripper plates, and guide parts. It also discusses the main reasons for mold burst, including issues with mold material, heat treatment, grinding, design process, wire cutting process, equipment selection, and stamping process. Maintaining molds properly and addressing design and manufacturing flaws can help prevent early mold failure and bursting.
The document outlines 15 steps for mold design and focuses on design considerations. It discusses analyzing product drawings, determining the injection machine type and number of cavities, selecting the parting surface, designing the gating system, ejection system, cooling system, and other elements. Key points include choosing an appropriate parting surface, layout of the flow channel and gate, ejection device, water distribution, exhaust, draft angles, and simplifying the mold structure as much as possible.
Casting is a manufacturing process where a liquid material is poured into a mold and allowed to solidify. The solidified part takes the shape of the mold cavity. There are several steps involved including making the mold cavity, heating the material, pouring it into the mold, and allowing it to solidify. Casting can create complex structures economically and all types of materials can be cast. However, casting often requires further surface finishing and can result in defects from the process.
This document discusses various manufacturing processes and provides details about casting processes. It describes:
1) Casting as one of the earliest metal shaping techniques known to humans involving pouring molten metal into a refractory mold and allowing it to solidify.
2) The six basic steps in the casting process including creating a mold cavity, incorporating gating systems, filling with molten metal, and allowing the metal to cool.
3) Common molding sand types used in casting like green sand, dry sand, and loam sand.
Triangle Engineering is an Omani company that manufactures and provides scaffolding services. It has the largest scaffolding factory in Oman with an automated production line and monthly capacity of 1200 tons. Triangle Engineering offers scaffolding sales, manufacturing, erection, dismantling services and products including standards, ledgers, transoms, frames, and fittings/couplers. Its vision is to provide quality Omani scaffolding products and services to industries such as oil/gas, construction, petrochemicals, and shipbuilding.
Allied Moulded Empire series wall mount enclosures may be used where contractors are looking for an enclosure that is lighter in weight for easier installation and simple-to-access cabinet doors for easier service capability. Units feature optional 3-point latching cabinet doors or twist latches for convenience. For detailed information, visit: https://bit.ly/2PYWgQH
This document provides information on foundry processes and sand casting. It defines important casting terminology like flasks, drags, copes, patterns, and parting lines. It describes the tools used in sand mold making like molds, hammers, and trowels. It explains the procedure for making a sand mold in steps from preparing the bottom board and drag to applying facing sand in the mold cavity. It also defines different types of molds like green sand molds, dry sand molds, and skin dried molds. The document outlines properties of molding sand and types of patterns used in casting.
The document discusses metal casting processes. It provides an overview of casting technology and classifications of solidification processes. Specifically, it describes sand casting processes including mold materials, open and closed molds, gating systems, risers, heating metal, pouring, and solidification of pure metals and alloys. Sand casting involves using expendable molds made of sand to form a cavity that shapes molten metal.
Jigs and fixtures are production tools used to manufacture identical parts accurately and interchangeably. Jigs both hold and guide cutting tools, while fixtures only hold workpieces. Key advantages of jigs and fixtures include increased productivity, interchangeability, quality control, and cost reduction through standardized production. Their primary purposes are to reduce production costs while maintaining consistent quality and maximizing efficiency. Common types of jigs include template, plate, and drill jigs, while fixtures are used for milling, grinding and other operations.
Types of Pattern in Casting Process was explained in a detailed way.
For more information, visit https://mechanicalstudents.com/sand-casting-process-die-casting-shell-mold-casting-investment-casting-process/
This document discusses various pattern allowances that must be accounted for when designing casting patterns. It describes shrinkage allowance, which accounts for the contraction of metals as they cool from liquid to solid. It also mentions machining allowance to allow for removal of surface imperfections during machining. Draft allowance tapers the pattern for easy removal from the mold. Distortion allowance accounts for uneven shrinking that can warp irregularly shaped castings. Finally, shake allowance enlarges the pattern to compensate for the mold cavity expanding slightly when the pattern is rapped to help removal.
El sistema de junta de expansión ZB 200/400 es un sello elastomérico de EPDM extruido de una pieza con orificios integrales, unidos en una cama de epoxi de alta resistencia, diseñado para su uso en aplicaciones de plataformas de estacionamiento. El sistema resultante se sella a cada lado con un sellador de uretano, lo que da como resultado un sistema de unión extremadamente duradero y hermético.
This document describes the design and development of a drill jig and fixture. It includes:
1. A list of team members and an index of sections.
2. Descriptions of what jigs and fixtures are, and that the purpose of this project is to create a drill jig and fixture from mild steel to accurately drill duplicate parts.
3. A summary of the design process in PRO-E software and development process involving shaping, grinding, drilling, welding, and finishing the mild steel components.
4. Images of the completed drill jig and fixture from multiple angles.
This document discusses different types of jigs and fixtures used in manufacturing. It describes various elements of jigs like the jig body, feet, drill bush, and plate. It then lists and describes common types of jigs like boring jigs, drill jigs, and template jigs. It also discusses different types of fixtures like plate fixtures, angle plate fixtures, vice-jaw fixtures, and multi-station fixtures. Finally, it covers fixtures for specific machine operations like turning, milling, boring, and welding fixtures.
Cast steel has greater strength than cast iron and is used when components experience severe loading conditions. It exists in four ordinary grades for most applications and special grades for duty. Cast steel has higher strength, hardness, bending strength, and elasticity than cast iron, making it suited for components requiring these properties. However, it has higher melting points, contracts more during solidification, and is more difficult to cast than cast iron. Proper form design through techniques like generous riser usage, uniform wall thicknesses, and contraction ribs can prevent issues like shrinkage cavities and hot cracks during solidification.
Core and core prints and types of cores by polayya chintadaPOLAYYA CHINTADA
This document discusses cores used in metal casting processes. Cores are temporary structures inserted into molds that create hollow spaces or cavities in castings. The document defines cores and their purposes, provides examples, and describes different types of cores including green sand cores, dry sand cores, horizontal cores, vertical cores, hanging cores, balanced cores, and drop cores. It explains the functions and characteristics of cores and how they are used to form internal features in metal castings.
This document discusses patterns and their types used in casting manufacturing. It defines a pattern as a replica of the object to be cast, which is slightly larger to allow for shrinkage and machining. Nine types of patterns are described: single piece, split piece, loose piece, gated, match plate, sweep, skeleton, follow board, and shell patterns. Requirements for good patterns and considerations in pattern design are also outlined.
The document discusses various components involved in the casting process including flasks, patterns, mould cavities, pouring basins, sprues, runners, gates, rissers, vents and cores. It describes the functions of these components and different types of patterns, rissers, and gates. The key steps in the casting process are discussed such as solidification, shrinkage and grain growth. Methods to calculate the size of rissers including Chvorinov's rule, Caine's method and modulus method are also summarized.
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.
Tool & Die is a tried and true industry. It can also be one of the most intimidating if you don’t know how it is used or when to use it. This presentation is designed to unlock some of the mysteries of Tool & Die and give you a better understanding of its uses. View this presentation and learn when and how to leverage Tool & Die in your company. Whether you have been around Tool & Die for years or you are just getting started, this presentation will enhance your knowledge and help you with upcoming decisions.
What you'll learn by viewing the webcast:
- Definition of Tool & Die
- Ways stamping dies are classified
- Operations that can be performed with stamping dies
- Different types of parts that can be made with stamping dies
- Determining precision of die produced parts
- Ways to implement Tool & Die into your organization
The document discusses key terms related to casting processes:
- A flask is a metal or wood frame used to form molds, and can be a drag (lower) or cope (upper) depending on its position.
- A pattern is a replica of the final object that is used to form the mold cavity.
- A parting line divides the two molding flasks that make up the mold.
- Molding sand is a mixture of silica sand, clay, and moisture used to form molds.
Summary of stamping die skills -dgmf mold clamps co., ltdJasmineHL
The document provides information on stamping die skills and reasons for mold burst. It discusses the main points of continuous mold maintenance including maintenance of convex and concave dies, stripper plates, and guide parts. It also discusses the main reasons for mold burst, including issues with mold material, heat treatment, grinding, design process, wire cutting process, equipment selection, and stamping process. Maintaining molds properly and addressing design and manufacturing flaws can help prevent early mold failure and bursting.
The document outlines 15 steps for mold design and focuses on design considerations. It discusses analyzing product drawings, determining the injection machine type and number of cavities, selecting the parting surface, designing the gating system, ejection system, cooling system, and other elements. Key points include choosing an appropriate parting surface, layout of the flow channel and gate, ejection device, water distribution, exhaust, draft angles, and simplifying the mold structure as much as possible.
Injection mold is a tool for producing plastic products; it is also a tool for giving plastic products a complete structure and precise dimensions. The structure of the injection mold and the quality of mold processing directly affects the quality and production efficiency of plastic parts. The most common and most common causes of injection mold failures and troubleshooting methods in the production of injection molds and plastic products are described in detail as follows:
Engineering Guidelines to Designing Plastic Parts for Injection MoldingJaycon Systems
At Jaycon Systems, we have chosen to use injection molding as the main manufacturing process to bring plastic products to life.
However, injection molding is not simple. Engaging in such process requires an extensive knowledge about its machinery and process.
In this presentation, we will show you some of the aspects we take into consideration when designing plastic parts for injection molding so we can save our customers time and money in the long run.
Basic requirements for plastic injection molded part designJasmineHL
Plastic Part Design Basic Requirements
Unreasonable design of plastic injection molded parts often results in some inherent defects in the product. For example, the structure of the parts is unreasonable, the parts use too much material, etc. Here are a series of basic requirements for plastic injection molded parts design for reference.
1. The document provides 8 tips for troubleshooting injection mold failures, including issues like guide column damage, difficult gates to discharge, movement and fixed mold offset, bending of moving templates, bent or missing jacks, poor cooling or water leakage, guide grooves that are too short, and failed fixed distance tensioning mechanisms.
2. Common causes of failures include poor finishing of tapered gate holes, use of low strength materials, misalignment of moving and fixed molds, insufficient thickness of moving templates, clearance issues with ejector pins, inadequate mold cooling design, guide grooves that are too short, and loss of synchronization in tensioning mechanisms.
3. Recommendations to address the failures include adding strong
The inclined top mold is also known as the inclined tip. It is the mechanism used to mold the internal barbs of the product in the mold design. It is suitable for relatively simple barbs.
This document provides instructions for operating a cut-off machine. It discusses safety precautions, tools used, specifications of the machine, and procedures for cutting materials. Key points include:
- Safety precautions like keeping guards in place, wearing proper protective equipment, and disconnecting the machine when not in use.
- The machine is powered by electricity and has specifications like voltage requirements and maximum cutting dimensions.
- Cutting procedures involve securely fastening the material, doing a trial run of the cutting wheel, and slowly lowering the wheel onto the material while the machine is running.
- Proper mounting and dismounting of the cutting wheel requires loosening and tightening a bolt using the provided wrench.
This document discusses the design of an angle plate jig by a group of students. The jig is intended to drill 8mm holes on a given workpiece. Key points:
- The group is divided into two sections to collaborate on the design project.
- The design of the jig will consider factors like the material selection for each part and geometric analysis to optimize output and ensure interchangeability.
- The design process will start conceptually and result in a 3D model created in Solidworks.
- The objectives are to produce a jig that increases productivity and reduces costs while maintaining accuracy and consistency.
This document discusses various types of jigs and fixtures used in machining. It describes different types of drill jigs like leaf jigs, channel jigs, and indexing jigs. It also discusses drill bushings, chip formation during drilling, and various fixtures used for milling, grinding, boring, and other operations. The purpose of jigs and fixtures is to accurately locate and secure workpieces for machining to improve accuracy, consistency, and productivity while reducing errors and rejects. Considerations for designing jigs and fixtures include the workpiece geometry, machine capabilities, and required tolerances.
igs and fixtures are specialised tools used in manufacturing to secure workpi...yhchauhan
igs and fixtures are specialised tools used in manufacturing to secure workpieces and guide cutting or shaping tools, ensuring precision and repeatability in production processes.
PREDICTIVE ANSLYSIS OF GATE AND RUNNER SYSTEM FOR PLASTIC INJUCTION MOULDIjripublishers Ijri
A runner system is an assembly of heated components used in plastic injection molds that inject molten plastic into the
cavities of the mold.
Every injection mold design has to have a gate or an opening through which the molten plastic is injected into the cavity
of the mold. The type and size of gate plays a very significant role in the process of injection molding and must not be
overlooked. Gates vary in size and shape depending upon the type of plastic being molded and the size and shape of the
part as well. Obviously, larger parts require larger gates, or even several gates.
The aim of the project work is to specify optimum design of runner and gate systems to enhance the production
rate for plastic part manufacturing.
In a sense, the injection mold is also a replacement device, that is, the plastic melt enters the mold cavity and simultaneously replaces the air in the mold cavity. In fact, the air in the mold is not limited to the cavity, especially the three-plate injection mold, and the air in the flow channel cannot be ignored. In addition, the plastic melt will produce a small amount of decomposition gas. These gases must be exhausted in time.
The document discusses jigs and fixtures, which are tools used to precisely locate and secure workpieces during manufacturing operations like machining. It defines jigs and fixtures, describes their key elements and principles of location and clamping. It also covers different types of locating and clamping devices as well as common types of jigs like drilling jigs. Jigs are used to guide cutting tools, while fixtures only position and hold the workpiece. Together, jigs and fixtures help improve accuracy, interchangeability and efficiency of mass production.
This document introduces 60 types of mold components used in stamping dies, plastic molds, or automation equipment exclusively for the mold industry. It begins by explaining that mold components refer to the general name of metal accessories used. It then provides brief 1-2 sentence descriptions of 5 components: sprue bushing, position locating ring, guide pin, angle pin, and sleeve pin. The document aims to provide an overview of the various components that make up molds.
The document discusses tooling in injection moulding. It defines a mould as a hollowed block that sets the shape of plastic products. Moulds can be made of materials like aluminum, steel, alloys and copper. The molten plastic is injected into the mould cavity where it cools and hardens into the final product. Mould designs depend on the material and component being moulded. Common mould types include two-plate, stripper, and three-plate moulds which differ in their ejection mechanisms and number of plates. The nozzle and screw are also discussed as providing the connection and conveying the material between the injection cylinder and mould tool.
Reasonable product design and mold design are key technologies that affect the success of injection molding. This article introduces some basic principles of injection molded product design and mold design.
1. The basic conditions of plastic product design
1.1. Record the product usage conditions as detailed as possible.
These conditions are:
A. Use environment
Outdoor conditions (sunlight, rain, ice, snow, dust), sunlight (ultraviolet rays, radiation, etc.), contact with gas (corrosive gas, water vapor), contact with liquid (water, detergent, oil, medicine, etc.), other (plasticizers), copper);
B. Use intensity
Common temperature, maximum temperature, minimum temperature (usually, special circumstances, outdoor, warehouse, window, car, etc.), repeated cold and hot
C. Use load
Common load, maximum load (normal, special circumstances. Static, dynamic, repeated, continuous, impact, drop, etc.).
This document outlines the steps in the lost wax casting procedure for dental restorations. It begins by introducing lost wax casting and describing the key steps: 1) Wax pattern removal, 2) Spruing, 3) Investing, 4) Burnout, 5) Casting. It then provides details on wax patterns, sprue formers, crucible formers, casting rings, and the investing procedure. Important considerations for each step are highlighted to produce an accurate casting.
The document provides information about a PE900*1200 series jaw crusher, including:
1. It describes the main components and operating mechanism of the jaw crusher, which uses an eccentric shaft to drive one jaw up and down to crush materials entering the crushing chamber.
2. It lists the main technical parameters such as maximum feed size, motor specifications, production capacity, and overall dimensions.
3. It provides instructions for installation, adjustment, operation, maintenance, and addresses potential issues like wearing parts and lubrication needs.
Similar to 6 points about ejector pins help your injection molding work increase 50%! (20)
Mold clamp tools definition
What is mold clamp? The mold clamp (also called mould clamp) is a kind of auxiliary clamping unit often used in injection mold processing, its main function is to keep the machined parts not shaking not moving in the processing.
What determines high performance plasticsJasmineHL
The following six factors determine the high-performance plastics.
(1) The type of polymer determines high-performance plastics
The performance is also different because of the different polymer links, such as acetal resin (POM) impact strength, then the unsaturated polyester resin (UP) is more excellent. Even if the same material, structure, and polymerization degree are different, the performance varies significantly.
The document discusses 18 basic injection molding technologies that injection molding technicians must understand. It covers topics such as nozzles, filters, screws, temperatures, cooling, and more. Proper understanding and application of these technologies is important for producing quality injection molded parts and ensuring safety during the injection molding process. Maintaining appropriate temperatures, speeds, and residence times is key to avoiding decomposition of plastics.
What is mold temperature in injection molding?JasmineHL
The mold temperature in injection molding is probably the most important temperature in terms of quality and this affects quality in many ways. The mold temperature is not the same thing as the cooling water temperature, it is the temperature of the actual mold cavity after it has stabilized.
What is progressive stamping die?
Progressive stamping is a metalworking method that can encompass punching, coining, bending, and several other ways of modifying metal raw material, combined with an automatic feeding system. The feeding system pushes a strip of metal through all of the stations of a progressive stamping die.
The progressive stamping die refers to a cold stamping die that uses a strip of stamping raw material to complete multiple stamping processes simultaneously with several different stations on one die in one stamping stroke, and the material strip moves at a fixed distance once for each stamping stroke until the product is finished.
1. Causes of dents
1.1 The thickness of each part of the product is different
1.2 Insufficient pressure inside the mold
1.3 Insufficient mold cooling
1.4 Deformation due to the insufficient cooling time
Precautions for injection mold maintenanceJasmineHL
Injection mold, as the most important production tool of injection molding factory, determines the shape, specification, size and appearance finish of the product. The material of the mold is steel, which is generally composed of a front mold and a back mold.
What are the key points of precision injection moldingJasmineHL
Precision injection molding is affected by many related factors and environmental conditions, and the most basic are the four basic factors of plastic materials, injection molds, injection molding processes, and injection molding equipment.
In the early stage of designing plastic products, engineering plastics with corresponding performance requirements should be selected according to the application environment.
Secondly, the appropriate injection molding machine should be selected according to the selected plastic material, finished product dimensional accuracy, part weight, quality requirements, and expected mold structure.
Five elements of injection molding process parametersJasmineHL
The injection molding process is one of the four major plastic molding processes. The barrels, basins, toys, and other daily products we use in our lives are all formed by the injection molding process. So what are the important factors to pay attention to in the plastic injection molding process?
The completion of the injection molding process generally requires six processes of clamping, filling, holding pressure, cooling, demolding, and opening the mold. In these six processes, we must remember these five elements, namely pressure, speed, position, temperature, and time.
What is the 4 process of plastic injection molding?JasmineHL
The plastic injection molding process mainly includes four stages: filling, holding pressure, cooling, and demolding. These four stages directly determine the molding quality of the product, and these four stages are a complete continuous process.
Plastic products are made of a mixture of synthetic resin and various additives as raw materials, using injection, extrusion, pressing, pouring, and other methods. While plastic products are being molded, they also obtain the final performance, so plastic molding is a key production process.
The following are 10 common plastic Injection molding methods.
How to solve flow lines in injection molded products?JasmineHL
This document discusses different types of flow lines that can occur in injection molded products and methods to solve them. The four main types of flow lines are: 1) Snake lines from unstable jet flow, 2) Wave lines from inconsistent melt flow speeds, 3) Radial lines from melt fracture, and 4) Fluorescent lines from molecular orientation. Solutions include optimizing process parameters like injection speed and pressure, increasing mold/melt temperatures, changing gate and cavity designs, extending runners, and applying post-molding heat treatments.
Secrets of injection molding process adjustmentJasmineHL
The close relationship between injection speed and product quality makes it a key parameter of injection molding. By determining the start, middle, and end of the filling speed segment, And to achieve a smooth transition from one set point to another set point, a stable melt surface speed can be ensured to produce the desired molecule and the smallest internal stress.
The cold forging, cold extrusion, and cold heading are general terms for plastic processing. Cold forging, also called cold volume forming, is a manufacturing process and a processing method. Cold forging is the forming process below the recrystallization temperature of the material, and the forging performed below the recovery temperature.
What is the difference between blow molding and injection moldingJasmineHL
What Is The Difference Between Blow Molding And Injection Molding?
First, the process is different
Blow molding: Blow molding uses gas pressure to inflate the hot parison closed in the mold into a hollow product, or the tube parison is inflated into a tube film without a mold.
Injection molding: injection molding is to melt plastic materials, and then inject them into the film cavity to form.
Blow molding is a manufacturing process for forming and joining together hollow plastic parts. It is also used for forming glass bottles or other hollow shapes. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding.
Demolding angle and product wall thickness designJasmineHL
This document provides guidelines for designing the demolding angle and wall thickness of injection molded plastic parts. It recommends a demolding angle between 0.5-1 degrees generally, but notes it may need to be larger for parts with thicker walls, larger sizes, higher shrinkage plastics, or detailed surface textures. It also stresses the importance of having a uniform, gradually changing wall thickness between 1-5mm to avoid molding issues and stresses having a minimum thickness of 0.4mm.
Appropriate opening of the injection mold air vent can greatly reduce the injection molding pressure, injection molding time, holding time, and injection mold clamping pressure, making the plastic parts from difficult to easy, thereby improving production efficiency, reducing production costs, and reducing the energy consumption of the machine.
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6 points about ejector pins help your injection molding work increase 50%!
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6 Points about ejector pins help your injection molding work
increase 50%!
Written By Jasmine of DGMF
What are ejector pins?
Ejector pins are the "bouncers" of the injection molding world. They apply a force to eject a part
from the mold, and in some cases can leave marks. Once the mold is opened, the pins extend
into the mold cavity, push the part out, and then retract, allowing the mold to close and be
refilled.
What are ejector pins made of?
While many molders use core pins made of copper alloys, there are many benefits of using them
for ejector pins as well. They have terrific heat-transfer properties and are very resistant to
galling.
What is the function of the ejector pin?
Ejector pins help safely remove parts from molds after they have been made. Here are some tips
on how to properly locate and use those pins. Ejector pins are the “bouncers” of the injection
molding world. They let technicians apply a force to eject a part from the mold, and, in some
cases, can leave marks.
How to use the ejector pins?
(1) The ejector pins should be arranged so that the ejection force is as balanced as possible. The
demolding force required for complex structures is large, and the number of ejectors should be
increased accordingly.
(2) The ejector pins should be set ineffective parts, such as bone, column, steps, metal inserts,
and some thick structural parts. The ejector pins on both sides of the bone and column should be
arranged as symmetrically as possible. The distance between the sides of the ejector pins and the
bone and column is generally D = 1.5mm. In addition, the centerline of the ejector pins on both
sides of the column should be as far as possible to pass through the center of the column.
(3) Avoid setting up ejector pins across steps or on inclined surfaces. The top surface of the
ejector pins should be as smooth as possible, and the ejector pins should be arranged at the
structural part where the rubber parts are better stressed.
(4) A flat ejector pin should be used when the plastic part is deeper (depth ≥20mm) or it is
difficult to arrange a dome needle. When a flat ejector pin is required, the flat ejector pin should
be inserted as much as possible to facilitate processing.
(5) Avoid sharp steel and thin steel, especially the top surface of the ejector pin should not touch
the front mold surface.
(6) The arrangement of ejector pins should consider the side distance between the ejector pins
and the water conveyance channel to avoid affecting the processing and water leakage of the
water conveyance channel.
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(7) The ejector function of the ejector is taken into consideration. In order to exhaust the ejector,
the ejector should be arranged at the place where the vacuum is easy to form. For example, at
the larger plane of the cavity, although the rubber packing force is small, it is easy to form a
vacuum, which results in an increased demolding force.
(8) For plastic parts with appearance requirements, the ejector pin cannot be arranged on the
appearance surface, and other ejection methods shall be used.
(9) For transparent plastic parts, the thimble cannot be placed on the part that needs to transmit
light.
How to select ejector pins?
B. Selection principle of ejector pins
(1) Use a large diameter ejector pin. That is if there is enough ejection position, larger diameter,
and size-first ejector should be selected.
(2) The size of the ejector pins should be as small as possible. When selecting an ejector pin, the
size of the ejector pin should be adjusted to minimize the size specifications, and the preferred
size series should be selected as far as possible.
(3) The ejector used should meet the ejection strength requirements. During ejection, the ejector
pin must withstand large pressure. To avoid bending and deformation of the small ejector pin,
when the ejector pin diameter is less than 2.5mm, an ejector pin should be used.
After the product completes a forming cycle, the mold is opened, and the product will be
wrapped on one side of the mold, which must be removed from the mold. This work must be
completed by the ejection system, which is an important part of the entire mold structure. It
generally consists of an ejection, reset and ejection guidance.
1.Design principles of the ejection system
There are various ejection systems, which are related to the shape, structure and plastic
properties of the product. Generally there are ejectors, ejector pins, push pins, ejection blocks,
and pneumatic compound ejection.
The structure diagram of the ejection system is shown in the figure.
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How to design ejector pins?
The ejector pins design principles are as follows:
① When selecting the parting surface, try to keep the product on the side with the parting
mechanism.
② Ejection force and position balance ensure that the product will not deform or burst.
③ The ejector pin must be set at a place that does not affect the appearance and function of the
product.
④ Try to use standard parts as safe and reliable as possible to facilitate manufacturing and
replacement.
⑤ The ejection position should be set at a place with high resistance and not too close to the
insert or core. For box-like deep cavity molds, the side resistance is the largest, and the top and
side ejection methods should be used at the same time to avoid product deformation and
bursting.
⑥ When there are thin and deep stiffeners, pushers are usually set at the bottom.
Avoid setting thimbles at the product inlet to avoid cracking.
⑧ For thin meat products, set an ejector pin on the manifold to take the product out.
The fit between the ejector pin and the ejector pinhole is usually a clearance fit. If it is too loose,
it will easily cause burrs, and if it is too tight, it will cause a seizure. In order to facilitate
processing and assembly and reduce the friction surface, generally, a mating length of 10 to 15
mm is reserved on the movable mold, and the remaining part is enlarged to 0.5 to 1.0 mm to
form an escape hole.
⑩ In order to prevent the ejector pin from rotating during production, it must be fixed on the
ejector plate. There are various forms, and it must be determined according to the ejector size,
shape and position.
What are the ejection types?
In the structure of the injection mold, the quality of the ejection mechanism directly affects the
quality of the finished plastic product. If the design is not good, the plastic part will produce a
series of defects, such as warping deformation, cracks, and whitening of the plastic part. The
determination of the ejection type is the most important link in the ejection design. The ejection
force and the ejection resistance are used to optimize the ejection type, number, and ejection
position.
(1) Ejector pin
The ejector pin is the simplest and most common form of the ejector. Because of its convenient
manufacturing, processing and repair, and good ejection effect, it is most widely used in
production. However, the circular ejection area is relatively small, which is prone to stress
concentration, product penetration, and product deformation. Avoid using in tubular box
products with small demolding gradient and high resistance. When the ejector pin is relatively
slender, generally a stepped ejector pin is provided to enhance rigidity and avoid bending and
breaking.
(2) Sleeve Pin
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The sleeve pin is also called the ejector sleeve pin or sleeve pins, and it is suitable for products
with ring, tube or center hole. It is ejected with uniform contact force throughout the week,
which will not deform the product and will not leave obvious ejection marks, which can improve
the concentricity of the product. However, avoid using the products with thick and thin
surrounding meat to avoid damage due to processing difficulties and weakened strength.
(3) Push Pin
The push pin is suitable for a variety of containers, boxes, cylinders and thin products with a
central hole. The ejection is smooth and uniform, and the ejection force is large, leaving no
ejection marks. Generally, there is a fixed connection to prevent the pushpin from being pushed
down during production or demoulding, but as long as the guidepost is long enough and the
ejection stroke is strictly controlled, the pushpin may not be fixed.
How to select plastic mold ejector pins?
The ejection system is one of the important functional structures of the injection mold. It consists
of a series of ejection parts and auxiliary parts, which can have different ejection actions. The
ejector pin is the most common ejection method. Ejector-type ejection elements, including
ejector pins, shoulder ejector pins, flat ejector pins, and push pins. The precautions for the
selection of the ejector pins are as follows:
1. Prevent deformation or damage of plastic parts, correctly analyze the size and location of the
plastic part's adhesion to the mold cavity, and select a suitable demoulding device so that the
ejection force is applied to the plastic part with the greatest rigidity and strength. The part, that is,
as far as possible against the wall, bone, and column, the area of action is as large as possible
(that is, as large as possible, a thimble with a large diameter) to prevent deformation or damage
to the plastic parts.
2. The structure is reasonable and reliable. The ejection mechanism should work reliably, be
flexible in movement, easy to manufacture, easy to replace, and have sufficient strength and
rigidity.
3. If the diameter of the ejector pin is less than φ 2.5 and the position is sufficient, a shoulder
ejector should be used; if the pusher wall is below 1mm or the pusher wall diameter ratio is ≤
0.1, the pusher with a shoulder should be used. The effective mating length of the ejector pin =
(2.5 ~ 3) D, the minimum must not be less than 8mm, we generally take 20-25mm during the
production process.
4. Try not to place the ejector pin on the insert splicing place
5. It is recommended to use a flat ejector pin for the long-arc glue position above 10mm. The
shorter the flat body part, the better the strength and the easier the processing. The length of
the cylindrical part should be indicated in the design specifications; for pipe positions above
10mm, it is recommended to use a push tube to eject.
6. For the occasion with an oblique ejector pin, in order to prevent the product from sliding with
the oblique ejector pin, the surface of the ejector pin near the oblique ejector pin should be
ground with a "+" slot.
Row position, inclined top
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When the sidewall of the rubber part has a concave-convex shape, a side hole, and a buckle, the
side core must be pulled out before the mold is ejected from the mold. This mechanism is called
the row position. Holes on the outer side of the plastic parts require core pulling off the rear
mold. If the groove on the inner side of the rubber part is ejected obliquely, the top opening
distance is not enough.
In addition, the use of oblique ejection, ejection mechanism completed at the same time ejection
and core pulling are called oblique ejection. For the parts that need to be cored on the rubber
parts, when the space for the position is not enough, the inclined top mechanism can be used to
complete it. In the oblique ejection mechanism, the oblique ejection distance should be greater
than the core pulling distance (B> H) to prevent ejection interference.
Both the inner and outer sidewalls of the plastic parts are concave. The inner side has bone
barriers and insufficient height. The front side of the outer side must be lined up, and the inner
side must be ejected obliquely. There must not be any clamps around the side holes of the
rubber parts. The side holes must be pulled out of the front mold row, and the buckle should be
ejected obliquely.
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