Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – With heating or cooling means
Patent
1995-11-13
1997-02-04
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
With heating or cooling means
26432816, 264537, 425441, 425525, 425533, 425552, B29C 4573, B29C 4906
Patent
active
055995675
ABSTRACT:
Thread split inserts used in injection molding bottle preforms of polyethylene terephthalate (PET). Each insert has a curved inner surface. A pair of inserts are mounted in the mold facing each other so the inner surfaces combine to form an opening therethrough. The opening provides the portion of the cavity which forms the neck portion of the preform. Each of the thread split inserts has an enclosed conduit through which cooling fluid circulates to improve cooling and reduce molding cycle time. The cooling fluid conduit has three curved portions which extend around the curved inner surface. Two of the curved portions extend in one plane and the other curved portion of the cooling fluid conduit extends in a second parallel plane.
REFERENCES:
patent: 3281514 (1966-10-01), Polka
patent: 3470282 (1969-09-01), Scalora
patent: 3868202 (1975-02-01), Valyi
patent: 4871507 (1989-10-01), Ajmera
patent: 5501593 (1996-03-01), Marcus
"High Performance Preform Tool Set with Real-time Closed Loop Mold Monitoring" prepared by Unitech Engineered Products.
Leyson Joseph
Woo Jay H.
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