Apparatus and method for injecting or extruding colored plastic

Details Apparatus and method for injecting or extruding colored plastic Apparatus and method for injecting or extruding colored plastic

1994-01-21

1996-01-23

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264349, 366 766, 366 769, 4253781, 425462, B29B 724, B29C 4710

Patent

active

054863279

ABSTRACT:
Apparatus including a barrel including a generally cylindrical inner wall defining a generally cylindrical chamber having a longitudinal axis, an inlet end for receiving solid material, and an outlet end for discharging molten material, the inner wall having therein a recess extending longitudinally of the chamber, a screw which extends along the longitudinal axis and which is rotatably housed in the chamber, a drive mechanism for rotating the screw about the axis, and a conduit for introducing colorant into the chamber, the conduit having a downstream end communicating directly with the recess so that colorant flowing through the conduit flows directly into the recess.

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