Apparatus for the production of blow molded articles accompanied

Details Apparatus for the production of blow molded articles accompanied Apparatus for the production of blow molded articles accompanied

1983-02-07

1984-03-27

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

425522, B29C 1707, B29C 2500

Patent

active

044391269

ABSTRACT:
In a blow molding process in which a parison is blown with a blowing gas containing a reactive gas component capable of reacting with the inner walls of the parison, the blowing gas is removed from the resulting blown article with a purging gas and stored for reuse. The mixture of blowing and purging gases in a reserve tank or other suitable means is adjusted to a certain level of pressure and reactive gas concentration and then recycled as the blowing gas in a subsequent blow molding step. The resulting blown articles from this process have improved properties, e.g. improved impermeability against non-polar solvents when fluorine is the reactive gas.

REFERENCES:
patent: 3065501 (1962-11-01), Gasmire
patent: 3789093 (1974-01-01), Bose
patent: 3862284 (1975-01-01), Dixon et al.
patent: 4126657 (1978-11-01), Gado
patent: 4367187 (1983-01-01), Fukushima et al.

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