Method for manufacturing synthetic resin containers

Details Method for manufacturing synthetic resin containers Method for manufacturing synthetic resin containers

1994-04-28

1996-07-09

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264513, 264572, B29C 4504, B29C 4514

Patent

active

055342167

ABSTRACT:
A method for manufacturing synthetic resin containers which are excellent in strength, toughness and heat insulation and have inner surfaces smooth and agreeable to the touch. The method including the steps of: (a) forming an inner surface layer component from a synthetic resin sheet by thermoforming; (b) fitting the inner surface layer component onto a male die; (c) pouring a synthetic resin in a melt condition into the inside of a female die; (d) fitting the male die onto the female die and bringing it close to the female die to compress the synthetic resin; (e) injecting compressed air into the synthetic resin through at least one air nozzle formed in the female die while enlarging a gap between the male and female dies so as to correspond to a predetermined thickness of a prospective molded product; (f) causing the compressed air to press the synthetic resin against entire inner surface of the cavity; and (g) cooling the synthetic resin to solidify the same and releasing the product from the dies.

REFERENCES:
patent: 4101617 (1978-07-01), Friederich
patent: 4968474 (1990-11-01), Ito
patent: 5006188 (1991-04-01), Usui et al.
patent: 5028377 (1991-07-01), Hendry
patent: 5277865 (1994-01-01), Hara et al.
patent: 5283028 (1994-02-01), Breezer et al.
patent: 5310330 (1994-05-01), Zweig et al.
Derwent Abstract of JP 6-055671 (Mar. 1, 1994).

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