Mold design with improved cooling

Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – With heating or cooling means

Reexamination Certificate

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Details

C249S079000, C264S527000, C264S543000, C425S540000, C425S527000

Reexamination Certificate

active

06896507

ABSTRACT:
A mold is provided for use with a wheel-type blow mold machine, the mold being one of a plurality of molds for locating in a circular pattern on a wheel of the blow-mold machine and having a longitudinal direction for aligning tangentially with a circumferential direction of the mold wheel and a transverse direction perpendicular to the longitudinal direction. The mold has a first part and a second part. The first part has a first molding portion with a longitudinal end in the longitudinal direction of the mold and a first end portion adjoining the first molding portion at the longitudinal end of the first molding portion and having a free edge opposite the first molding portion, the free edge being non-parallel to the longitudinal direction and the transverse direction. The first part also has an outer cooling circuit located in the first end portion, and an inner cooling circuit located in the first end portion at a different location in the transverse direction than the outer cooling circuit. The inner cooling circuit is a split tube with a first passage of the split tube being for directing a cooling fluid to the first end portion and a second passage of the split tube being for directing the cooling fluid from the first end portion. The second part is separable from the first part and has a second molding portion.

REFERENCES:
patent: 2770011 (1956-11-01), Kelly
patent: 3764250 (1973-10-01), Waterloo
patent: 4966544 (1990-10-01), Mitake
patent: 5762981 (1998-06-01), Nitsche
patent: 6444159 (2002-09-01), Petre
patent: 6447281 (2002-09-01), Petre

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