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

• Main Authors: LORENZ, HANS, 6100 DARMSTADT, DE, SCHUCHMANN, ROLAND, 6105 OBER-RAMSTADT, DE, GROSS, HEINZ. DR.., 6101 ROSSDORF, DE, HAERING, HELMUT, 6107 REINHEIM, DE
• Format: Patent
• Language: English
• Published: 21.02.1991
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

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.