20 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
Rockwell hardness
Manufacturing; Plastic injection molding
A measure of the surface hardness of a material. A value derived from the increase in depth of an impression as the load of a steel indenter is increased from a fixed minimum value to a higher value ...
Melt flow rate
Manufacturing; Plastic injection molding
A measure of the molten viscosity of a polymer determined by the weight of polymer extruded through an orifice under specified conditions of pressure and temperature. Particular conditions are ...
Compression moulding
Manufacturing; Plastic injection molding
A method of moulding in which the moulding material, generally preheated, is placed in an open heated mould cavity, the mould is closed with a top force, pressure is applied to force the material ...
Split-ring mould
Manufacturing; Plastic injection molding
A mould in which a split cavity block is assembled in a channel to permit the forming of undercuts in a moulded piece. These parts are ejected from the mould and then separated from the piece.
Bulk density
Manufacturing; Plastic injection molding
A measurement of mass per unit volume of materials (such as powders) that describes the effects of the particle packing density.
Multi-cavity mould
Manufacturing; Plastic injection molding
A mould having two or more impressions for forming finished items in one machine cycle.
Compound
Manufacturing; Plastic injection molding
A mixture of resin(s) and additives usually formed in a separate machine downstream forn the primary reactor.
