Internal blow molding process

Details Internal blow molding process Internal blow molding process

1986-08-13

1988-07-05

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...

215 31, 249 59, 425525, B29C 4954, B29D 100, B65D 102

Patent

active

047553421

ABSTRACT:
A method for producing in a cylindrical thermoplastic material an internal thread by blow molding the thermoplastic material in a mold in which the surface of the mold defining the outer face of the thread is at a negative angle of at least 5 degrees to the planes perpendicular to the axis of the cylindrical material.

REFERENCES:
patent: 2315478 (1943-03-01), Parkhurst
patent: 3198375 (1965-08-01), Hunter
patent: 3371376 (1968-03-01), Fischer et al.
patent: 3769394 (1973-10-01), Latreille

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