Method and apparatus for making an extrusion product, and an extrusion product
AssigneeUponor Innovation AB
InventorsJyri Järvenkylä, Terho Lahtinen, Michael Sjöberg
Life of this patent
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Abstract
An extrusion material is extruded through a tool and a fluoropolymer is between the extrusion material and a surface of the tool for reducing friction between the extrusion material and the surface of the tool. The surface of the tool is of a material with thermal conductivity greater than 30 W/mK.
Claims22
In a method in which an extrusion material is extruded through a tool (2) and a fluoropolymer is between the extrusion material and a surface of the tool (2) for reducing friction between the extrusion material and the surface of the tool, the improvement wherein:
- at least the surface of the tool (2) is of a material with thermal conductivity greater than the thermal conductivity of tool steel.
In an apparatus for extruding an extrusion material, the improvements comprising:
- a tool (2) through which the extrusion material is extruded with a fluoropolymer between the extrusion material and a surface of the tool (2) as a slip agent,
- wherein at least part of the surface of the tool (2) is at a smallest cross section of the tool and of a material with a thermal conductivity greater than the thermal conductivity of tool steel.
In a method in which an extrusion material is extruded through a tool (2) and a fluoropolymer is between the extrusion material and a surface of the tool (2) for reducing friction between the extrusion material and the surface of the tool, the improvement wherein:
- at least the surface of the tool (2) is of a material with thermal conductivity greater than 30 W/mK.
Dependencies are inferred from the claim text.