Biaxial orientation blow molding process

Details Biaxial orientation blow molding process Biaxial orientation blow molding process

2008-01-08

2008-01-08

McDowell, Suzanne E. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

C264S535000

Reexamination Certificate

active

07316798

ABSTRACT:
The double blow molding process comprises a primary blow molding step of biaxially drawing and blow molding the preform into a primary intermediate product, a step of heating the primary intermediate product to shrink-mold it into the secondary intermediate product, and a secondary blow molding step of molding the secondary intermediate product into a bottle. This double blow molding process is characterized in that, just before the secondary blow molding step, the secondary intermediate product on standby is maintained at a temperature at least 40° C. or 50° C. higher than the mold temperature used in said secondary blow molding step. From such a temperature, it is possible to determine the double blow molding conditions, which can correspond to the levels of heat resistance required for the bottles, and to provide, with high productivity, the bottles having necessary levels of heat resistance.

REFERENCES:
patent: 4550007 (1985-10-01), Ohtsu et al.
patent: 5277574 (1994-01-01), Denis et al.
patent: 5510079 (1996-04-01), Sugiura et al.
patent: 5785921 (1998-07-01), Outreman et al.
patent: 2 108 899 (1983-05-01), None

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