Process for producing biaxially drawn plastic bottles having exc

Details Process for producing biaxially drawn plastic bottles having exc Process for producing biaxially drawn plastic bottles having exc

1994-07-28

1997-03-18

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Direct application of fluid pressure

264521, 264529, 264531, 264532, 264906, 425526, 425529, B29C 4912

Patent

active

056119879

ABSTRACT:
A process for producing biaxially drawn plastic bottles having excellent heat resistance and an apparatus therefor. The process comprises a step of biaxially drawing and free blow-molding the preformed article to obtain a secondary molded article thereof, a step of heating the secondary molded article by inserting it for 0.3 to 5 seconds in the infrared rays emitted from an infrared-ray radiation member that has a substantially planar radiation surface having a height larger than that of the secondary molded article in the direction of height and having a surface temperature of from 350.degree. C. to 1000.degree. C., in order to obtain a tertiary product thereof that is shrunk, and a step for blow-molding the tertiary product that is in a heated state in a metal mold to obtain a final molded article. A single metal mold is used for blow-molding to shorten the time occupied by the metal mold and to produce the bottles having excellent heat resistance maintaining high productivity.

REFERENCES:
patent: 4547333 (1985-10-01), Takada
patent: 4790741 (1988-12-01), Takakusaki et al.
patent: 5128091 (1992-07-01), Agur
patent: 5308233 (1994-05-01), Denis et al.

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