THERMALLY PLASTIC RESIN SHEET EXTRUSION DEVICE

摘要

PURPOSE: To obtain a product having a uniform concn. gradient by providing a wedge-shaped extrusion orifice extending in parallel to the axis of a torpedo- shaped probe by 30-50% of the length of the probe to the surface of the probe for extruding a colored thermoplastic resin melt. CONSTITUTION: An extrusion orifice 2 extending long and narrow so as to have an extrusion passage 7 provided to the center part to communicate with the wall of a probe 1 extends in parallel to the longitudinal axis of the probe 1 over a length of about 30-50% of the total length of the probe 1 and has a wedge shape forming a substantially rectangular shape of constant width over the greater part of the orifice length starting from the vicinity of the inlet end of the extrusion passage 7 and gradually becoming narrow in the remaining part of the orifice length to disappear finally.