Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1998-10-08
2000-08-01
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to heat or cool
425562, B29C 4520
Patent
active
060957891
ABSTRACT:
A hot sprue bushing is provided for transporting plasticized material from an injection nozzle to a mold cavity while controlling the temperature of the plasticized material. This hot sprue bushing comprises an elongate body having a head, a stem and a distal end portion, and a through passage extending therethrough from end to end through the head, stem and distal end portion of the body for transporting plasticized material through the hot sprue bushing from the heat to the distal end portion thereof. The distal end portion of the body bears a first engaging device, and the head of the body is of greater cross-section than the stem so that the head provides a first abutment surface extending outwardly of the stem. An electrically powered heater is wrapped around the stem of the head in heating conducting relationship therewith. A sleeve surrounds the electrically powered heater; and a tip member has a second engaging device engaged with the first engaging device on the distal end portion of the body, the tip member having a second abutment surface engaged with one end of the sleeve so as to urge the opposed end of the sleeve into engagement with the first abutment surface on the head. The tip member permits egress of plasticized material from the through passage in the body.
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Borrelli Louis A.
Grace Christopher T.
Hepler Douglas C.
Caufield Francis J.
Heitbrink Tim
Polyshot Corporation
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