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Injection Molding Machines -- Component Glossary
Barrel - Supports the reciprocating plasticizing screw; heated by electric heater bands
Clamping system - Opens and closes the mold, supports and carries the mold parts, and keeps the mold from opening
Hopper - Holds resin pellets, which are gravity-fed into the barrel and screw assembly
Mold system - Basically a heat exchanger in which the melted plastic solidifies into the shape of the cavity; consists of tie bars, stationary and moving platens, as well as molding plates, housing the cavity, sprue and runner systems, ejector pins, and cooling channels.
Nozzle - Connects the barrel to the sprue bushing of the mold and forms a seal between the barrel and the mold
Screw - Compresses, melts and conveys the resin; has three zones: feeding zone, compressing (or transition) zone, and metering zone
Stationary platen - Attached to the barrel side of the machine
Tie bars - Connect the moving and stationary platens

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