Gate cooling structure in a molding stack
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United States of America Patent
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-
Sep 12, 2006
Grant Date -
Dec 9, 2004
app pub date -
Jun 5, 2003
filing date -
Jun 5, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gate insert (10, 110) for a stack assembly in an injection molding machine having a gate (16, 116) through which a melt of thermoplastics material enters a mold cavity (14, 114). The gate insert has a cooling channel (18, 118) surrounding, and substantially uniformly spaced from, the gate (16, 116). The cooling channel has an inner surface with a profile substantially parallel to the gate. The cooling channel is further defined by either a structural insert in the form of a split ring (30) or by a recess (23) in a two-piece gate insert having interconnecting surfaces (111a, 111b).
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