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Plastic injection molding

Plastic injection molding is the primary process for manufacturing plastic parts used in consumer goods such as computer keyboards, monitors, bottle caps, cups and solid plastic articles. Plastic is known to be a very versatile and economical material that is used in many applications. Injection molding involves taking plastic in the form of pellets or granules and heating this material until a melt is obtained. Then the melt is forced into a split-die chamber/mold where it is allowed to "cool" into the desired shape. The mold is then opened and the part is ejected, at which time the cycle is repeated.

Contributors in Plastic injection molding

Plastic injection molding

extrudate

Manufacturing; Plastic injection molding

The product or material delivered from an extruder, for example, film, pipe profiles.

molding window

Manufacturing; Plastic injection molding

the range of molding conditions under which a part can be successfully molded.

shear rate

Manufacturing; Plastic injection molding

the rate at which a layer of melt slides over the layer below. Shear rate is velocity-related rather than force- related.

modulus in compression

Manufacturing; Plastic injection molding

The ratio of compressive stress to strain within elastic limits of the material.

modulus in shear

Manufacturing; Plastic injection molding

The ratio of shear stress to strain within elastic limits of the material.

Young's modulus

Manufacturing; Plastic injection molding

The ratio of tensile stress to tensile strain below the proportional limit.

specific gravity

Manufacturing; Plastic injection molding

The ratio of the density of a material as compared to the density of water at standard atmospheric pressure (1 ATM) and room temperature (73F).

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