Apparatus for adjusting the temperature of a parison for stretch

Details Apparatus for adjusting the temperature of a parison for stretch Apparatus for adjusting the temperature of a parison for stretch

1982-08-30

1984-02-14

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Means treating shaped work

In or on work confining surface

219343, 219352, 219417, 264521, 264535, 425525, 425526, B29C 2500, B29C 1707

Patent

active

044313985

ABSTRACT:
A method of heating a parison neck by stretching blow molding, wherein an injection molded synthetic resin parison is adjusted in temperature while holding a parison neck, by a neck mold for molding a parison neck, after which the parison is stretched and expanded to form a container such as a bottle, the method comprising at the time of adjusting temperature of said parison, heating a lower end of the neck mold and applying heat enough to prevent formation of an annular constriction in a molded product, to a border between a parison neck covered by the neck mold through the end of said neck mold and a body.

REFERENCES:
patent: 3191225 (1965-06-01), Polka
patent: 4233022 (1980-11-01), Brady et al.

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