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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.
Industry: Manufacturing
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Plastic injection molding
shrinkage
Manufacturing; Plastic injection molding
contraction upon cooling of all or areas of the part. Shrinkage occurs less is disorientated material and more across chains of molecules than along their lengths. Lower pack area have lower areas of ...
uniform cooling time
Manufacturing; Plastic injection molding
Cooling time the same throughout the part to avoid warping.
crazing
Manufacturing; Plastic injection molding
Defect in plastics articles characterized by distinct surface cracks or minute frost-like internal cracks, resulting from stresses within the article which exceed the tensile strength of the plastic.
photodegradation
Manufacturing; Plastic injection molding
Degradation of plastics due to the action of light.
modulus
Manufacturing; Plastic injection molding
Derived from the Latin world meaning "small measure", modulus is the ratio of stress to strain in the linear region of the s-e curve.
thermal degradation
Manufacturing; Plastic injection molding
deterioration of the material by heat, characterized by molecular scission.
runner balancing
Manufacturing; Plastic injection molding
The development of a runner system which delivers the required amount of melt to each cavity with the correct pressure to finish filling all the cavities simultaneously at the correct temperature for ...
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