Blow molding process

Details Blow molding process Blow molding process

1985-09-27

1986-10-14

Silbaugh, Jan

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156156, 15624414, 156497, 264 83, 264516, 264526, 264528, 264529, B29C 4946, B29C 4920

Patent

active

046170774

ABSTRACT:
In producing hollow bodies by blow molding from thermoplastic material, a preferably tubular preform is firstly formed, and is then expanded within the blowing mold under the effect of an inert gas under high pressure, until it bears entirely against the inside surface of the blowing mold. Thereafter, a reaction gas such as fluorine is introduced into the hollow body under a considerably lower pressure, while the hollow body is still in the mold, to treat the internal surface of the hollow body to render it impervious to gas and/or liquid. After the reaction has elapsed, a flushing and cooling gas is introduced into the hollow body and is then removed from the blowing mold after the hollow body has sufficiently set.

REFERENCES:
patent: 2811468 (1957-10-01), Joffre
patent: 3647613 (1972-03-01), Scotland
patent: 3862284 (1975-01-01), Dixon et al.
patent: 3988491 (1976-10-01), Dixon et al.
patent: 3998180 (1976-12-01), Hawkins et al.
patent: 4020223 (1977-04-01), Dixon et al.
patent: 4081574 (1978-03-01), Hawkins et al.
patent: 4142032 (1979-02-01), D'Angelo
patent: 4336015 (1982-06-01), Rainville
patent: 4394333 (1983-07-01), Fukushima et al.
patent: 4396567 (1983-08-01), Rainville
patent: 4536266 (1985-08-01), Bliefert et al.

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