Thermoplastic cooling method

Details Thermoplastic cooling method Thermoplastic cooling method

1976-07-16

1978-05-02

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 95, 264169, 264209, 264237, 264348, B29D 2304

Patent

active

040875040

ABSTRACT:
A cooling system for quenching extruded thermoplastic tubing which moves in a vertically upward direction from a die to a cooling mandrel comprises a seal means between the die and the mandrel and the introduction of cooling fluid such as water between the seal and the mandrel to flow upwardly as the tube passes along the mandrel. A water vapor atmosphere below the seal provides a controlled atmosphere leaking past the seal which condenses immediately upon passing the seal and coming into contact with the cooling fluid. This controlled atmosphere avoids air leakage past the seal and consequent imperfections in the thermoplastic material tube.

REFERENCES:
patent: 2581231 (1952-01-01), Berggren
patent: 3129272 (1964-04-01), Ferrier et al.
patent: 3284552 (1966-11-01), Haley
patent: 3331901 (1967-07-01), Thomas
patent: 3426111 (1969-02-01), Simpson
patent: 3655846 (1972-04-01), Kanoh et al.
patent: 3661482 (1972-05-01), Brown, Jr.
patent: 3891374 (1975-06-01), Nimomiya et al.
patent: 3985931 (1976-10-01), Blackwelder
patent: 3990828 (1976-11-01), Reifenhauser

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