VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON COEXTRUDIERTEN PRODUKTEN

摘要

PCT No. PCT/GB92/01496 Sec. 371 Date Jun. 17, 1994 Sec. 102(e) Date Jun. 17, 1994 PCT Filed Aug. 13, 1992 PCT Pub. No. WO93/03909 PCT Pub. Date Mar. 4, 1993.A method for manufacturing coextruded products by coextruding continuous strands of one extrudable material and enveloping sheaths and twisting these sheathed strands about each other for at least part of a full revolution. An apparatus for manufacturing such products comprises a multiplicity of nozzles each having a central bore with feeding means and an annular opening surrounding this bore having separte feeding means, which nozzles are arranged for mutual movement comprising at least part of a rotation.