Seal for molded part insert
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United States of America Patent
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-
Sep 19, 1989
Grant Date -
N/A
app pub date -
Apr 28, 1988
filing date -
Apr 28, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for sealing around an insert in a molded part to avoid the escape of flash including a mold cavity cooperatively defined by at least two mold blocks, at least one of the mold blocks having at least one insert opening communicating with the cavity. A plunger chamber is substantially co-axial to the insert opening and communicates with the cavity via the insert opening, the plunger chamber having generally greater radial dimensions than the insert opening, thereby defining a generally inwardly-directed flange with respect to the walls of the plunger chamber. The surface of the flange remote from the cavity constitutes a seating surface within the insert opening. A resilient seal is fitted within the plunger chamber against the seating surface in proximity to the insert. A plunger is positioned within the plunger chamber for relative movement generally towards and away from the cavity to compress the resilient seal against the seating surface.
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