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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

Crazing

Manufacturing; Plastic injection molding

Defect in plastics articles characterised by distinct surface cracks or minute frost-like internal cracks, resulting from stresses within the article which exceed the tensile strength of the plastic.

Material safety data sheets

Manufacturing; Plastic injection molding

Documentation regarding the toxicity or hazards associated with contact with some substances. The manufacturer of the plastic prepares these data sheets.

Amorphous

Manufacturing; Plastic injection molding

Devoid of crystallinity or stratification. Most plastics are amorphous at processing temperatures. Material assumes more random molecular structure when cooling.

Naturally balanced runner system

Manufacturing; Plastic injection molding

Each succession of runner is identical to the runners in the same succession in all other flows in the mold.

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.

Photodegradation

Manufacturing; Plastic injection molding

Degradation of plastics due to the action of light.

Burned

Manufacturing; Plastic injection molding

Showing evidence of excessive heating during processing or use of a plastic, as evidenced by blistering, discoloration, distortion or destruction of the surface.

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