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What is Mold Cavity ?

What is Mold Cavity ?

The mold cavity of a casting does not reflect the exact dimensions of the finished part due to a number of reasons. These modifications to the mold cavity are known as allowances and account for patternmaker's shrinkage, draft, machining, and distortion. In non-expendable processes, these allowances are imparted directly into the permanent mold, but in expendable mold processes they are imparted into the patterns, which later form the mold cavity.[23] Note that for non-expendable molds an allowance is required for the dimensional change of the mold due to heating to operating temperatures.

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what is Injection process?

what is Injection process?

With injection moulding, granular plastic is fed by a forced ram from a hopper into a heated barrel. As the granules are slowly moved forward by a screw-type plunger, the plastic is forced into a heated chamber, where it is melted. As the plunger advances, the melted plastic is forced through a nozzle that rests against the mould, allowing it to enter the mould cavity through a gate and runner system. The mould remains cold so the plastic solidifies almost as soon as the mould is filled

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what is Automotive molding ?

what is Automotive molding ?

Automotive molding or car body molding are decorative and protective moldings on the car body . The term applies both to the detail and the material. Car moldings include side body molding, lower body molding, door moldings, window moldings, footrest mold

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What is Rotational molding ?

What is Rotational molding ?

Rotational Molding (BrE moulding) involves a heated hollow mold which is filled with a charge or shot weight of material. It is then slowly rotated (usually around two perpendicular axes), causing the softened material to disperse and stick to the walls of the mold

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what is the jig?

what is the jig?

A jig's primary purpose is to provide repeatability, accuracy, and interchangeability in the manufacturing of products.[1] A jig is often confused with a fixture; a fixture holds the work in a fixed location. A device that does both functions (holding the work and guiding a tool) is called a jig.

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The type of jig

The type of jig

A drill jig is a type of jig that expedites repetitive hole center location on multiple interchangeable parts by acting as a template to guide the twist drill or other boring device into the precise location of each intended hole center. In metalworking practice, typically a hardened drill bushing lines each hole on the jig plate to keep the tool from damaging the jig.

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What is Fixture (tool)?

What is Fixture (tool)?

A fixture is a work-holding or support device used in the manufacturing industry.[1][2] Fixtures are used to securely locate (position in a specific location or orientation) and support the work, ensuring that all parts produced using the fixture will maintain conformity and interchangeability. Using a fixture improves the economy of production by allowing smooth operation and quick transition from part to part, reducing the requirement for skilled labor by simplifying how workpieces are mounted, and increasing conformity across a production run.[2]

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How many types of fixtures ?

How many types of fixtures ?

Fixtures are usually classified according to the machine for which they were designed. The most common two are milling fixtures and drill fixtures.

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5 Reasons Why Injection Moulding is So Effective

5 Reasons Why Injection Moulding is So Effective

Injection moulding is one of the most popular and versatile methods for mass producing plastic parts, as it has multiple advantages over other methods of plastic moulding.

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What is Plastic Moulding?

What is Plastic Moulding?

Plastic moulding is the process of shaping plastic using a rigid frame or mould. The technique allows for the creation of objects of all shapes and sizes with huge design flexibility for both simple and highly complex designs. A popular manufacturing option, plastic moulding techniques are responsible for many car parts, containers, signs and other high volume items

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what you need to Injection Moulding

what you need to Injection Moulding

Injection Moulding (or Molding to use the US spelling), along with extrusion ranks as one of the prime processes for producing plastics articles. It is a fast process and is used to produce large numbers of identical items from high precision engineering components to disposable consumer goods.

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How does injection moulding work?

How does injection moulding work?

Material for the part is fed into a heated barrel, mixed, and forced into a mould cavity, where it cures and hardens to the configuration of the cavity. Moulds are typically made from metal, usually either steel or aluminium, and precision-machined to form the features of the part. They may need to split in a variety of ways to eject the finished part, or locate inserts that are bonded into the product.

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