Extruder die for extrusion of a thermoplastic laminate

US4708618A · kind A · utility

Assignee

• REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK · DE

Inventors

• Hans Reifenhauser · Troisdorf, DE
• Paul Reitemeyer · Troisdorf, DE
• Klemens Krumm · Neunkirchen, DE
• Heinz Beisemann · Rösrath, DE

Key dates

• Filing date: Nov 7, 1986
• Grant date: Nov 24, 1987
• Expiry date: Nov 7, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/865
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An extruder die for extrusion of a multilayer thermoplastic laminate, particularly in the form of a foil or plate, comprises a multicomponent block symmetric with respect to a central plane dividing a plurality of feed channels and distributing channels connected to said feed channels, at least one mouth and a central distributor channel connected to and following said mouth symmetric in relation to the axis of said extruder die as well as an outlet die following said central distributor channel. The block has on the end opposite the outlet die an additional feed channel with a round or rectangular cross section for feeding in a special plastic material which changes over into a discharge duct extending to the mouth. The additional feed channel is positioned in a cartridge which has a plurality of tempering passages distributed over the periphery and length thereof and which is mounted in a cartridge receptacle of the block and the cartridge moreover is provided with a plurality of feed ducts for providing a coating plastic material to the flow of the special plastic material.