Method and apparatus for manufacturing an extrusion having an un

Details Method and apparatus for manufacturing an extrusion having an un Method and apparatus for manufacturing an extrusion having an un

1995-03-29

1996-10-15

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26421113, 264237, 264342R, 264348, 4253781, 425380, B29C 4788

Patent

active

055651593

ABSTRACT:
A method of manufacturing an etched extrusion, the method comprising the steps of extruding a thermoplastic material to produce a hot extrusion, and contacting the extrusion, while the extrusion is still hot, with a mixture of at least two fluids having different thermal conductivities so that the extrusion develops an uneven outer surface due to different rates of shrinkage caused by the different thermal conductivities.

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patent: 4753863 (1988-06-01), Spanjer
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