Apparatus for calibrating an extruded thermoplastic tube

Details Apparatus for calibrating an extruded thermoplastic tube Apparatus for calibrating an extruded thermoplastic tube

1975-12-03

1977-06-14

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Including means advancing continuous length work through...

425325, B29C 2500

Patent

active

040294528

ABSTRACT:
An apparatus for the manufacture of an extruded thermoplastic tube in which the freshly extruded tube is cooled and sized or calibrated in a liquid cooling medium by passage through a series of draw plates in which the cooling liquid is fed and directed in a spiral flow path emerging along the circumference of the tube as it passes through the central calibrating opening of each draw plate. The draw plates are preferably immersed in water as the cooling liquid partially filling a tank maintained under a vacuum.

REFERENCES:
patent: 2138394 (1938-11-01), Wuppermann
patent: 3378887 (1968-04-01), Reib et al.
patent: 3538210 (1970-11-01), Gatto
patent: 3668288 (1972-06-01), Takahashi

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