Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – With heating or cooling means
Patent
1987-03-30
1988-07-26
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
With heating or cooling means
425536, 425538, B29C 4904, B29C 4964
Patent
active
047597089
ABSTRACT:
An extrusion blow molding apparatus of the type having a parison tube extruder and at least one blowing station for producing a dual-compartment container as an improvement for increasing the rate at which containers can be produced, wherein a cooling liquid is circulated through a pair of blow pins in a manner creating a zone of highest cooling effect at a tip portion of the blow pins for internally cooling a portion of the parison formed into pouring openings of the dual-compartment container. The zone of highest cooling effect is produced, in accordance with a preferred embodiment, through the provision of a blow pin assembly having an inner tube through which inflation air is blown into a parison, an outer sleeve positioned around the inner tube, and a tip element mounted in a position overlying an air outlet end of the inner tube. A blow port in the tip element communicates with an air outlet of the inner tube. A cooling chamber, forming the zone of highest cooling effect, is created within the tip element and communicates with an outlet of an inflow portion of a cooling fluid circulation path defined between the inner tube and outer sleeve, as well as with an inlet of an outflow portion of the cooling fluid circulation path. Moreover, the thickness of the flow path in areas peripherally surrounding the cooling chamber is reduced relative to the thickness of the blow pin in areas peripherally surrounding the inflow and outflow portions.
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Anon Battenfeld Fischer FHB Blow Molding Machines, Fischer Kunstofftechnik.
Hestehave Borge
Hestehave Kjeld
Bomatic, Inc.
Hoag Willard
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