Plastic extrusion is a process where polymer compound pellet is fed from into of the extruder and heated to a molten state, the material is then processed through the extruders which forces the compound material through a die that carries the shape of the profile required. The extrusion is then cooled and formed to the correct shape and then cut to the specified length.
Plastic injection is a process used for manufacturing products or parts by injecting molten material into a shaped mold or die. The molding involves melting granular plastic pellets into a liquid form and then compressing this liquid into the empty cavity of a mold tool. The plastic will retain the shape of the mold as well as the surface texture of the walls of the cavity.
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