Process for blow molding hollow bodies with symmetric mold porti

Details Process for blow molding hollow bodies with symmetric mold porti Process for blow molding hollow bodies with symmetric mold porti

1991-10-11

1993-10-05

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

264523, 264540, 425150, 425532, 425541, B29C 4956, B29C 4978

Patent

active

052502384

ABSTRACT:
A process and apparatus for the production of hollow bodies from thermoplastic material by means of blow molding uses a blow molding mold which includes at least first and second mold portions to enclose a generally tubular extruded preform which is expanded within the mold under the effect of an increased internal pressure within the preform. To provide for asymmetric closing and/or opening movements of the mold portions relative to the preform, the blow molding mold is displaced as an entirety parallel to the direction of the opening and/or closing movements of the mold portions, more especially during the mold closing and/or opening procedure, so that an additional motion is superimposed on the movements of the mold portions.

REFERENCES:
patent: 3325860 (1967-06-01), Hansen
patent: 3749541 (1973-07-01), Mehnert
patent: 3767341 (1973-10-01), Siebelhoff et al.
patent: 3883286 (1975-05-01), Kinslow, Jr. et al.
patent: 4150080 (1979-04-01), Hagen
patent: 4285658 (1981-08-01), Bohart et al.
patent: 4409161 (1983-10-01), Harry et al.
Search Report of EP 91 11 6386 (Jan. 20, 1992) 2 pp.

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