Stretching and blow molding of synthetic resin bottles with base

Details Stretching and blow molding of synthetic resin bottles with base Stretching and blow molding of synthetic resin bottles with base

1980-08-20

1981-11-03

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264532, 425503, 425525, B29C 1707, B29D 300

Patent

active

042985676

ABSTRACT:
Synthetic resin bottles with base cups are prepared by stretching a parison with a bottom having a sprue at its bottom surface, by means of a stretching rod, to the bottom surface of a base cup having a hole at its center, the base cup being mounted on a bottom mold of a blow mold, the bottom mold having a hole larger than the hole of the base cup, in which a pressing jig is mounted for crushing the sprue formed on the bottom of the parison with a bottom; inserting the sprue into the hole in the bottom of the base cup; crushing the sprue by means of the pressing jig to form a rivet; and, at the same time, blowing air into the parison with a bottom so as to press the outer bottom surface of the parison against the inner surface of the base cup to securely adhere one to the other.

REFERENCES:
patent: 3367809 (1968-02-01), Soloff
patent: 3898310 (1975-08-01), Schiemann
patent: 4225375 (1980-09-01), Aidlin et al.

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