Method for blow molding with active ingredient in blowing gas

Details Method for blow molding with active ingredient in blowing gas Method for blow molding with active ingredient in blowing gas

1981-06-01

1983-08-02

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264526, 264538, B29C 1707, B29C 2500

Patent

active

043965679

ABSTRACT:
Articles, such as containers, can have their barrier properties improved either by using a small percentage of fluorine or other materials in the gas that is used at the blowing station of an injection blow molding machine. Some of these materials, such as fluorine, are a hazard to operators of the machine. This invention encloses the operational stations so that the blowing gas mixture cannot escape into the atmosphere of the shop where the blow molding machine is operating. An inert gas such as nitrogen is mixed with the fluorine gas, and the enclosing housing is purged when the machine is shut down at the end of a run.

REFERENCES:
patent: 3789093 (1974-01-01), Bose
patent: 3852392 (1974-12-01), Davis et al.
patent: 3862284 (1975-01-01), Dixon et al.
patent: 3999911 (1976-12-01), Matsubara

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