Method and apparatus for blow molding curved hollow bodies made

Details Method and apparatus for blow molding curved hollow bodies made Method and apparatus for blow molding curved hollow bodies made

1987-05-22

1988-10-11

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...

264295, 264339, 264531, 264571, 425388, 425392, 425525, B29C 5308, B29C 4904

Patent

active

047770066

ABSTRACT:
During blow molding of curved plastic hollow bodies, the parison is first extruded as a whole in a substantially straight line and vertically from top to bottom. The parison is then severed from the extrusion die and the severed parison precurved. Finally, the precurved parison is inserted as a whole into the blow mold and blown. An apparatus for carrying out this method comprises releasable support means for accommodating and holding the parison, curving means for preliminary curving of the parison, tilting means for tilting the support means into the horizontal position and a blow mold, the precurved parison being placed as a whole in one mold half of this blow mold.

REFERENCES:
patent: 3408692 (1968-11-01), Scharch
patent: 3449480 (1969-06-01), Hough
patent: 3508295 (1970-04-01), Hough
patent: 4026983 (1977-05-01), Stockwell
patent: 4118162 (1978-10-01), Baumgarten
patent: 4242296 (1980-12-01), Bricker

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