Travelling mold tunnel apparatus for smooth walled pipe
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United States of America Patent
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-
May 14, 1996
Grant Date -
N/A
app pub date -
Feb 8, 1993
filing date -
Jun 14, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for making smooth walled tube (20) in a travelling mold tunnel (26) includes corrugations (32) for traction of tube being molded. An extrusion nozzle (16) having an exit angle of 45.degree. or more may provide additional advantage.
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