Thermoplastic material extruding appts. - has two or more extruders to form melt streams, co-extrusion adaptor, with two or more inlets, side channels, co-extrusion nozzle, etc.

摘要

An arrangement for producing an extrusion, with at least two layers, of a thermoplastic by coextrusion, includes at least two extruders for forming at least two melt streams, a coextrusion adaptor with at least two inlet openings, a side channel, a coextrusion nozzle and a cooling agent for the extruded material. The arrangement has devices for measuring the thickness of the extruded material over a number of points over its width, and a slider adjusting mechanism. ADVANTAGE - The arrangement is simple and irregularities in the layers can be eliminated during extrusion.