INJECTION MOLDING

Injection molding is the most widely used process for
high volume production of thermoplastic resin parts,
reinforced or otherwise. The process can also be used for
thermoset resin with modifications and can incorporate
longer fibers. Thermoplastic pellets or compounded
thermoset materials are fed through a hopper and then
into a heated barrel containing a rotating screw or
plunger that mixes and heats the material. The heated
resin is then forced at high pressure through sprues and
runners into a matched metal mold. Injection molding can
produce complex parts with metal inserts, any surface
finish, and good dimensional accuracy at high output
rates.
Photos from recent seminars on the subject of
injection molding: 7

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Web Author: Terry Price (tprice@cerritos.edu)
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Last update: 11/14/01 |