Core pin cooling for high speed injection molding apparatus
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United States of America Patent
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Dec 9, 1980
Grant Date -
N/A
app pub date -
Dec 3, 1979
filing date -
Dec 3, 1979
priority date (Note) -
Expired
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Abstract
The invention provides an improved cooling arrangement for the core pin of a commercially available injection molding machine permitting a significant reduction in the cycle time of such machine. The core pin is fabricated by the assembly of a plurality of concentric sleeve-like members, one of which is provided with six parallel helically disposed external grooves which respectively define three parallel passages for cooling fluid inlet and three parallel outlet passages for the heated fluid. The arrangement provides a significant increase in the quantity of cooling fluid flowing through the core pin, hence permits a significant decrease in cycle time of the injection molding machine.
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