Cooling thermoplastics tubes

Details Cooling thermoplastics tubes Cooling thermoplastics tubes

1976-09-23

1978-06-06

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Including means advancing continuous length work through...

425325, 425392, 425404, 425445, B29D 2304

Patent

active

040934128

ABSTRACT:
Cooling an extruding thermoplastic tube by feeding the tube adjacent a cooling surface, maintaining a sheath of heat-transfer fluid between the tube and surface and preferentially cooling at least a selected area of the tube by transversely displacing the tube to decrease the thickness of the sheath between the selected area and the cooling surface. The invention is particularly suitable, for the production of thermoplastic films by orienting a cast tubular extrudate which has been cooled by means of an internal mandrel.

REFERENCES:
patent: 3217361 (1965-11-01), Ryan et al.
patent: 3474755 (1969-10-01), Voo
patent: 3684421 (1972-08-01), Pilcher

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