Device for smoothing and cooling or cooling of an extruded material sheet
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United States of America Patent
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-
Apr 16, 2002
Grant Date -
N/A
app pub date -
Oct 5, 1999
filing date -
Oct 5, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for smoothing and cooling of a material sheet (8) of thermoplastic, especially a film or sheet which are processed into plates which have been extruded by an extruder via a sheet die. Two pairs of units (2, 3; 4, 5) are provided which oppose each other and act on the surfaces (9, 10) of the material sheet (8). The units each have an active area (11) to contact the material sheet (8) forming part of the metal belt (12). The lower surface of the metal belt (12) is coolable in areas below the active area (11). The metal belt (12) is guided over a driving roll (20), which is drivable. The units provide a universal temperature profile, which is achieved over the thickness of a material sheet (8) while cooling and smoothing the sheet. Accordingly, stress differences are prevented.
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