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Questions and Answers
What is the application temperature of the composits from resin bonded glass fibers and fillers?
What is the application temperature of the composits from resin bonded glass fibers and fillers?
What is the thermal conductivity of the composits from resin bonded glass fibers and fillers?
What is the thermal conductivity of the composits from resin bonded glass fibers and fillers?
What is the name of the mold design that has at least two opening directions?
What is the name of the mold design that has at least two opening directions?
What is the purpose of the wedge area in the slider mold?
What is the purpose of the wedge area in the slider mold?
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What is the reason for the equation αb = αw - 2°?
What is the reason for the equation αb = αw - 2°?
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What type of actuation is used for moving parts in a core-puller mold?
What type of actuation is used for moving parts in a core-puller mold?
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Which of the following is NOT a characteristic of a split mold?
Which of the following is NOT a characteristic of a split mold?
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What is the primary purpose of the ejector pins and sockets in a split mold?
What is the primary purpose of the ejector pins and sockets in a split mold?
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What is the main difference between a core-puller mold and a split mold?
What is the main difference between a core-puller mold and a split mold?
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What is the advantage of using a 3-plate mold?
What is the advantage of using a 3-plate mold?
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Which type of mold is best suited for molding parts with multiple cavities?
Which type of mold is best suited for molding parts with multiple cavities?
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What is the primary factor determining the quality of molded parts in a core-puller mold?
What is the primary factor determining the quality of molded parts in a core-puller mold?
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Which of the following is NOT a typical method used to control the positions of moving parts in a core-puller mold?
Which of the following is NOT a typical method used to control the positions of moving parts in a core-puller mold?
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What is the primary function of the risers in a molding system?
What is the primary function of the risers in a molding system?
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Which component prevents the ejector pins from pushing back too far?
Which component prevents the ejector pins from pushing back too far?
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What role do bolster sleeves play in injection molding?
What role do bolster sleeves play in injection molding?
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Why is the small gap between the fixed plate and the ejector plate important?
Why is the small gap between the fixed plate and the ejector plate important?
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What is the function of guide bushes in the injection molding system?
What is the function of guide bushes in the injection molding system?
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What is the primary function of the mould core in an injection mould?
What is the primary function of the mould core in an injection mould?
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Which component is responsible for ensuring correct alignment of the two halves of the mould?
Which component is responsible for ensuring correct alignment of the two halves of the mould?
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What type of canals are used for uniform or controlled heat distribution in the mould?
What type of canals are used for uniform or controlled heat distribution in the mould?
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What is the purpose of the gate in an injection mould?
What is the purpose of the gate in an injection mould?
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Which of the following describes a sprue bush?
Which of the following describes a sprue bush?
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What is the difference between a hot tip and a cold tip sprue bush?
What is the difference between a hot tip and a cold tip sprue bush?
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Why is the design of the core and cavity important in injection moulding?
Why is the design of the core and cavity important in injection moulding?
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What role does a cavity retaining plate play in injection moulds?
What role does a cavity retaining plate play in injection moulds?
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What characterizes a basic mould in injection moulding?
What characterizes a basic mould in injection moulding?
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Which material is specified for guide pins in the content?
Which material is specified for guide pins in the content?
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What is the primary function of ejector pins in the context of basic moulds?
What is the primary function of ejector pins in the context of basic moulds?
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Which of the following statements is NOT true regarding fixed and moving halves of a mould?
Which of the following statements is NOT true regarding fixed and moving halves of a mould?
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What hardness level is associated with steel 1.7131 as mentioned in the content?
What hardness level is associated with steel 1.7131 as mentioned in the content?
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In which direction does a basic mould primarily open?
In which direction does a basic mould primarily open?
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What is a key feature of basic mould design concerning undercuts?
What is a key feature of basic mould design concerning undercuts?
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Which of the following steel grades is used in conjunction with 1.7131 for mould applications?
Which of the following steel grades is used in conjunction with 1.7131 for mould applications?
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What is the purpose of the fixed half plate in an injection moulding machine?
What is the purpose of the fixed half plate in an injection moulding machine?
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What material is used for ejector pins as specified in standard parts?
What material is used for ejector pins as specified in standard parts?
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Which steel is specified for boltster sleeves?
Which steel is specified for boltster sleeves?
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What mechanical property is associated with retaining plates made from hot work steel?
What mechanical property is associated with retaining plates made from hot work steel?
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Which component ensures alignment between the fixed half plate and the injection moulding machine?
Which component ensures alignment between the fixed half plate and the injection moulding machine?
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What is the mechanical property of the locating ring made from St 50?
What is the mechanical property of the locating ring made from St 50?
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What is the surface hardness of sprue bushing made from 14NiCr14?
What is the surface hardness of sprue bushing made from 14NiCr14?
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Which of the following materials has a strength of 400-500 N/mm² for the back plate?
Which of the following materials has a strength of 400-500 N/mm² for the back plate?
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Study Notes
Different Kinds of Moulds
- Various types of molds exist, each with distinct characteristics and applications.
- Mold design and function are crucial for efficient production.
- Different tasks and functions of the mold are vital for optimal performance.
Task & Functions of a Mould
- Transfer motion: The mold facilitates movement to transfer materials.
- Absorb forces/retain shape: The mold resists and maintains the shape of components.
- Guiding mold parts: Mold components guide the material to form the desired shape.
- Long lifetime: The mold design should last a significant time in use.
Mould Standard Parts
- Standardized parts are tried, tested, and typically used for years.
- Functional guarantee is ensured for these parts.
- Rapid availability and replacement options for repairs exist.
- Cost-effective in comparison to other options.
- CAD data is accessible for these standard parts.
Parts of an Injection Mould
- Mould core: It guides and shapes the part framework.
- Moving half: A framework that allows a component to be removed.
- Bolts: Secure mold components in place.
- Risers: Gaps to guide plates in motion.
- Ejector plate: Removes the product.
- Ejector locating plate & Retainer: Guides ejector pins.
- Bolster sleeves: Secure elements.
- Moving half support plate: Supports the moving half of a mold.
- Guide bushes: Guide pins.
- Retaining plate: Maintains the position of other components.
Steels for Functional Pars/Standard Parts
- Different steel types (e.g., 115CrV3, 16MnCr5) are employed for various mold parts.
- Each type exhibits specific mechanical properties (e.g., hardness, strength).
- Material properties are crucial for mold performance.
Tolerances of Shafts and Bushes
- Specific tolerances are given for components (Guide Pins).
- Clearances are defined to ensure proper fit.
- Tolerance details are listed for shaf and bush sizes.
Kinds of Injection Moulds
- Basic mould: A simple mold with 2 halves, one parting line, and one opening direction. Removal of molded parts occurs by gravity or ejector pins.
- Slider mould: A construction design with at least 2 opening directions, and hardened wedges.
- Split-Mould: A modification of the slider mould design, suitable for larger, threaded parts. Requires horizontal and vertical parting lines.
- 3-Plate Mould: A complex mould design suitable for complex shapes with multiple parting lines.
- Screw-Mould: A design featuring various threads that rotates, enabling different directions and use cases.
- Core Puller: A type of mold where the moving parts are operated hydraulically or pneumatically through switches.
- Multi Cavity Mould, IMD Moulding / IML Moulding.
Principle of 3-Plate Mould
- Process breaks down into two crucial steps: opening and closing the mold.
- Ejector system is stabilized by bushes to prevent deformations during operation. This relates to mold function.
Kinds of Injection Moulds
- Stack Mould: A complex mold suited for flat parts. Features a multi-part design.
- Change Mould: A simple, configurable mold design suited for simple, configurable designs.
Additional Information
- Various mold types can accommodate different material or component characteristics and geometries.
- Mold components must be well-fitted and maintained to function properly.
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Description
Test your knowledge on mold design, particularly focusing on core-puller and split molds, as well as the properties of resin bonded glass fiber composites. This quiz covers topics such as thermal conductivity, actuation methods, and mold structures. Enhance your understanding of composite materials and their applications in molding techniques.
