11 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
weld line
Manufacturing; Plastic injection molding
Where melted material flows together during molding to form a visible line or lines on a finished part that may cause weakening or breaking of the component.
knit lines
Manufacturing; Plastic injection molding
Where melted material flows together to form a line or lines that may cause weakening or breaking of the component.
raised ejector site
Manufacturing; Plastic injection molding
Where the ejector site is either heightened or raised above the surface of the component.
flash gate
Manufacturing; Plastic injection molding
Wide gate extending from a runner which runs parallel to an edge of a molded part along the parting line of a mold.
side-draw pins
Manufacturing; Plastic injection molding
Projections used to core a hole in a direction other than the line of closing of a mold and which must be withdrawn before the part is ejected from the mold. See also Retractable Cores.
mechanical property
Manufacturing; Plastic injection molding
Properties of plastics which are classified as mechanical include abrasion resistance, creep, ductility, friction resistance, elasticity hardness, impact resistance, stiffness and strength.
melt flow
Manufacturing; Plastic injection molding
Rate of extrusion of molten resin through a die of specified length and diameter. The conditions of the test (e.g. temperature and load) should be given. Frequently, however, the manufacturer's data ...
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