Plastic article or earthenware shaping or treating: apparatus – Including means advancing continuous length work through...
Patent
1994-05-12
1996-05-14
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Including means advancing continuous length work through...
264178R, 2642094, 264560, 264562, 264564, 264568, 4253261, 425388, 425392, B29C 4790
Patent
active
055162703
ABSTRACT:
A sizing tool for extruding plastic tubing is disclosed. The tool includes a peripheral wall having an inner surface that defines the outer dimension of a plastic tubing advancing from an extruder through the tool under influence of an internal pressure exceeding the pressure prevailing in the tool. The tool also includes a lubricating water channel system in the peripheral wall and extending along the tool length and having at least one opening communicating with the inner surface of said peripheral wall. The tool also includes a cooling medium channel system in the peripheral wall and extending along the length. The cooling medium channel system being substantially closed within the peripheral wall and being separate from the lubricating water channel system.
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SPE Journal, Oct. 1964, pp. 1093-1097.
JRT-Finland Oy
Leyson Joseph
Woo Jay H.
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