Method for blowing oriented containers

Details Method for blowing oriented containers Method for blowing oriented containers

1982-03-22

1983-11-08

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264537, B29C 1707

Patent

active

044141750

ABSTRACT:
This specification discloses an improved apparatus and method for making bi-axially oriented containers in an injection blow molding machine. The parison is brought to the blow mold at orientation temperature, and the end of a reciprocating element is brought into contact with the end of the parison and is shaped to prevent the end of the parison from shifting off center as the parison is blown and stretched axially while it expands circumferentially to obtain bi-axial orientation. The reciprocating element prevents the parison from shifting laterally in the blowing mold so that the stretching and the wall thickness of the blown article is uniform.

REFERENCES:
patent: 688924 (1901-12-01), Blair et al.
patent: 3275726 (1966-09-01), Rudolph
patent: 3550200 (1970-12-01), Gilbert
patent: 3757718 (1973-09-01), Johnson
patent: 4061706 (1977-12-01), Duffield et al.

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