Gas assist needle in a molding machine
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United States of America Patent
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May 14, 2002
Grant Date -
N/A
app pub date -
Feb 22, 2000
filing date -
Feb 22, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An injection needle for use in a mold cavity of a gas-assisted injection molding machine. The injection needle includes a tubular member and a stem slidably disposed in the tubular member. The stem is positionable in a raised position and a retracted position. The injection needle further includes a central bore extending within the stem for supplying a gas and a slot. The slot is operable for relieving gas pressure within the mold cavity when the stem is in the retracted position.
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