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US 10,538,024 B2Granted
Extrusion tool with heating of the outlet region, method for producing a tubular plastics film
AssigneeWindmoller & Holscher
InventorsIngo Rübbelke, Mathias Gersmann
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Abstract
The invention relates to an extrusion tool (10) for a film blow head (1) of a tubular extrusion system for extrusion of a tube (2) from a plastic melt (3) with a tool body (11), which comprises a melting channel (12) for a configuration of a tube (2), wherein the tool body (11) comprises a collar area (13) with an outlet opening (14) for the tube (2).
Claims11
An extrusion tool for a film blow head of a tubular extrusion system for extrusion of a tube, which comprises:
- a tool body having a melting channel for a configuration of a tube extruded from a plastic melt,
- a collar area with an outlet opening for the tube,
- a heater for a local heating of the collar area, and
- a heat separation,
- wherein a distance Y between the heat separation and the melting channel remains between 0.5 millimeter (mm) and 10 mm;
- wherein the heat separation extends from an opening to an ending in the collar area around the outlet opening toward the melting channel, wherein the distance y is configured as a distance between the ending of the heat separation and an outer boundary of the melting channel.
3 more elements
Dependencies are inferred from the claim text.