Method for injection blow molding

Details Method for injection blow molding Method for injection blow molding

Filed on

1977-07-11

Date issued

1979-05-01

Examiner

Silbaugh, Jan H.

Patent Class

Plastic and nonmetallic article shaping or treating: processes

SubClass

With step of cleaning, polishing, or preconditioning...

Other Related Categories

264528, B29C 1707

Type

Patent

Status

active

Patent number

041523830

Description

ABSTRACT:
A novel procedure for circulating blowing air through an injection blow molded article during the blow cooling cycle of an injection molding process is described. The technique involves the use of a new core rod assembly which permits internal circulation of cool air during the blow cooling cycle of the process. The described assembly may also be used for reconditioning itself by the use of heated air, so avoiding the phenomenon of core rod freeze-up.

REFERENCES:
patent: 3116877 (1964-01-01), Moslo
patent: 3305890 (1967-02-01), Senior et al.
patent: 3321564 (1967-05-01), Dobbins et al.
patent: 3349155 (1967-10-01), Valyi
patent: 3937610 (1976-02-01), Farrell
patent: 4054630 (1977-10-01), Wang

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