Blow-molding method for resinous molding product and apparatus t

Details Blow-molding method for resinous molding product and apparatus t Blow-molding method for resinous molding product and apparatus t

1993-02-19

1995-12-12

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264520, 264531, 425526, B29C 4964

Patent

active

054747341

ABSTRACT:
A parison is hung down between a pair of molding metallic molds in the opened state, expanding members are contacted with the specified portions of the parison, and after setting the temperature difference between the specified portions and other portions in accordance with a pre-set thickness ratio between both portions after forming thereof, the expanding members are moved while cooling the specified portions of expanding members so as to extend and thin the portions other than the specified portions of the parison, and the metallic molds are closed together so as to blow compressed air into the parison to effect blow-molding.

REFERENCES:
patent: 3125619 (1964-03-01), Miller
patent: 3278665 (1966-10-01), Harrison
patent: 3452391 (1969-07-01), Langecker
patent: 3632713 (1972-01-01), Seefluth
patent: 3892830 (1975-07-01), Hudson et al.
patent: 5346665 (1994-09-01), Watanabe et al.

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