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1. (WO1998051470) EXTRUSION TOOL AND PROCEDURE FOR ITS MANUFACTURE

Pub. No.:    WO/1998/051470    International Application No.:    PCT/IB1998/000703
Publication Date: Fri Nov 20 00:59:59 CET 1998 International Filing Date: Sat May 09 01:59:59 CEST 1998
IPC: B29C 47/06
B29C 47/20
B29C 47/70
Applicants: B & W KUNSTSTOFFMASCHINENBAU & HANDELSGESELLSCHAFT MBH
KREBS, Stefan
Inventors: KREBS, Stefan
Title: EXTRUSION TOOL AND PROCEDURE FOR ITS MANUFACTURE
Abstract:
The present invention concerns an extrusion tool (1) with an annular outlet gap or circular slot, especially sleeve tools and mandrel holding tools, and also a procedure for manufacturing an extrusion tool of such a type. The present invention distinguishes itself in that, the center mandrel (4) is surrounded annularly by a flow divider (3), which divides the melt flow into two annular partial flows. The center mandrel (4) and/or the flow divider (3) are also arranged eccentric to the center line of the annular outlet gap (13) in the region lodged directly in front of the annular outlet gap (13). Two melt flows with eccentric distribution of wall thickness result from this.