10 Terms
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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
Flow pattern
Manufacturing; Plastic injection molding
The contour the melt takes sequentially as it fills the cavity.
Damping
Manufacturing; Plastic injection molding
The effect on a mass that causes decreasing amplitude.
Flexural modulus
Manufacturing; Plastic injection molding
The ratio, within the elastic limit, of the applied stress on a test specimen in flexure to the corresponding strain in the outermost elements of the specimen.
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).
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.
Bulk factor
Manufacturing; Plastic injection molding
The ratio of the volume of any given mass of loose plastic material to the volume of the same mass of the material after molding.
Modulus in compression
Manufacturing; Plastic injection molding
The ratio of compressive stress to strain within elastic limits of the material.
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