Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1992-05-15
1993-11-23
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264540, 425531, 425532, B29C 4904
Patent
active
052641783
ABSTRACT:
The method includes moving a parison guide and a lower molding portion to substantially vertically align an extruding head, the parison guide and an end of the lower molding portion. Then, the lower molding portion is moved substantially horizontally while extruding a parison from the extruding head, while the parison guide is moved laterally in a direction crossing the moving direction of the lower molding portion in accordance with a shape of a groove of the lower molding portion to accommodate a first portion of the parison in the groove. Subsequently, the parison is cut into a predetermined length when the predetermined length thereof is extruded, while a portion of the parison to be cut is held by a parison pinch. Finally, the parison guide is moved laterally in a direction crossing the moving direction of the lower molding portion in accordance with the shape of the groove while moving the lower molding portion substantially horizontally as the parison pinch is lowered gradually to accommodate a second portion of the parison in the groove.
REFERENCES:
patent: 4239474 (1980-12-01), Nakagawa
patent: 4738612 (1988-04-01), Kikuchi et al.
patent: 5030083 (1991-07-01), Kohno et al.
Ohmori Naoki
Yamamura Michio
Tigers Polymer Corporation
Timm Catherine
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