Apparatus for the production of foamed polyolefin sheets
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United States of America Patent
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Jan 25, 1994
Issued Date -
N/A
app pub date -
Oct 7, 1992
filing date -
Nov 11, 1988
priority date (Note) -
Expired
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Abstract
An apparatus for the formation of a foamed polyolefin sheet provided with a cylindrical cooling device for cooling a foamed extruded tubular body at one end of an extruder, air outlets for increasing the internal pressure of the cooled foamed tubular body at a region between the extruder die and the upstream section of a cylindrical cooling device and between at least two adjacent sections of a cylindrical cooling device and a cutting blade for slitting the foamed tubular body enables the production of foamed polyolefin sheets with improved surface characteristics and strength.
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