Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to cause relative movement between mold and charger
Patent
1998-08-12
2000-03-28
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to cause relative movement between mold and charger
264255, 425575, B29C 4504
Patent
active
060423641
ABSTRACT:
A method for manufacturing hollow parts using a mold assembly including a movable mold having a male die and a female die for shaping two split halves, respectively, of the hollow part and being mounted on a movable platen and a sliding mold capable of movement between two positions within a horizontally moving sliding mold guide and having a female die and a male die that face the male die and the female die, respectively, the method comprises the steps of: injecting a molten resin into a pair of cavities formed between the opposing male die and female die and between the opposing male die and female die through a primary sprue in the sliding mold, thereby forming split halves; separating the movable mold from a fixed mold together with the sliding mold guide so that a resin sprue runner portion that has solidified within the primary sprue is knocked out of the mold assembly and then sliding the mold so that the split halves left within the respective female dies will face each other; bringing the movable and sliding molds into registry with each other so that the split halves will abut against each other; and injecting a molten resin around the peripheral edges of the abutting faces through a secondary sprue in the sliding mold so that the split halves are fused to each other with the peripherally injected resin.
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Heitbrink Tim
The Japan Steel Works Ltd.
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