8 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
haze
Manufacturing; Plastic injection molding
The cloudy appearance of a material caused by light scattered from within the specimen or from its surfaces.
Poisson's ratio
Manufacturing; Plastic injection molding
The constant relating the changes in dimensions which occur when a material is stretched. It is obtained by dividing the change in width per unit length by the change in length per unit length.
flow pattern
Manufacturing; Plastic injection molding
The contour the melt takes sequentially as it fills the cavity.
fill pattern
Manufacturing; Plastic injection molding
the contours of the advance of the material as the cavity fills. (See flow pattern)
notch sensitivity
Manufacturing; Plastic injection molding
The extent to which the sensitivity of a material to fracture is increased by the presence of a surface notch or sudden change in section.
drooling
Manufacturing; Plastic injection molding
The extrudation or leakage of molten resin from nozzle or nozzle sprue bushing area while filling or shooting the mold.
thermoplastic elastomers
Manufacturing; Plastic injection molding
The family of polymers that resemble elastomers in that they can be repeatedly stretched without distortion of the unstressed part shape, but are true thermoplastics and thus do not require curing.
