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US 5,639,488 AGranted
Molding apparatus
AssigneeSumitomo Wiring Systems, Ltd.
InventorsHironobu Nakano, Masatoshi Nagata, Junichi Shoudai
Life of this patent
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Abstract
There is disclosed a molding apparatus which includes an ejector pin (16) having, at its forward end, an ejecting portion (33) permitted to abut against an end surface of a tubular elastic resin product (28) and gradually flaring out toward a forward end thereof, and an annular recess (9) for receiving an annular edge portion (26), whereby the tubular elastic resin product (28) is released from a cavity (22) without damages to a base portion of the annular edge portion (26).
Claims11
A molding apparatus for molding a tubular elastic resin product comprising
- a mold having a cavity for molding said tubular elastic resin product, said cavity having an annular molding portion adapted to form an annular edge portion;
- and
- an ejector pin for forcing said tubular elastic resin product molded in said cavity thereof outwardly to release said product from said mold,
- said ejector pin including
- an ejecting portion for pressing an end surface of said tubular elastic resin product at said one end thereof, and
- a support portion for supporting said ejecting portion at one end thereof,
- said support portion having an annular recess on an outer peripheral surface adjacent said ejecting portion and adapted to receive said annular edge portion as it is elastically deformed and curled when said tubular elastic resin product is forced outwardly.
4 more elements
Dependencies are inferred from the claim text.