Sizing tool

Plastic article or earthenware shaping or treating: apparatus – Including means advancing continuous length work through...

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Details

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.

REFERENCES:
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patent: 3169272 (1965-02-01), Maxson
patent: 3187383 (1965-06-01), Bacchus et al.
patent: 3212135 (1965-10-01), Branscum
patent: 3229005 (1966-01-01), Reifenhauser
patent: 3248463 (1966-04-01), Wiley et al.
patent: 3288317 (1966-11-01), Wiley
patent: 3532780 (1970-10-01), Kakutani et al.
patent: 3546745 (1970-12-01), Ball
patent: 3668288 (1972-06-01), Takahashi
patent: 4063705 (1977-12-01), Vodra
patent: 4543051 (1985-09-01), Maillefer
patent: 4808098 (1989-02-01), Chan et al.
patent: 5085567 (1992-02-01), Neumann
SPE Journal, Oct. 1964, pp. 1093-1097.

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