Vacuum calibrator tool
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United States of America Patent
Stats
-
Jul 15, 1997
Grant Date -
N/A
app pub date -
Aug 7, 1995
filing date -
Aug 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vacuum calibrator tool for use with a vacuum chamber is provided to accurately size and shape the outer surface of molten plastic extrudate entering the vacuum chamber. The tool provides water passages to introduce water into the extrudate receiving opening of the tool at several positions along the extrudate receiving opening so that an extended zone of water within the extrudate receiving opening provides a film of water between the vacuum calibrator tool and the extrudate passing through it to lubricate the extrudate and to permit accurate sizing and shaping of the extrudate. The vacuum calibrator tool is preferably formed of a low coefficient of friction plastic material such as glass filled polytetrafluroethylene solid commercially under the registered trademark TEFLON.RTM..
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