Composite molding and method of manufacturing the same
To provide a composite molding and a method of manufacturing the same, capable of preventing insufficient filling of a rubber member and improving a product yield, the composite molding has a resin member and a rubber member molded to cover upper and lower faces of the resin member. A plurality of holes communicating with the resin member are provided in at least one of faces of the rubber member. The holes are loopholes of pins that support the resin member during molding of the rubber member while being spaced from a mold die.
1. A composite molding comprising:
a resin member ( 2 ) having upper ( 2 a ) and lower faces ( 2 b ); and
a rubber member ( 3 ) molded to cover the upper and lower faces of the resin member,
wherein a plurality of holes ( 7 ) communicating with at least one of the faces ( 2 a , 2 b ) of the resin member at an outer edge of the resin member are provided in the rubber member,
the holes ( 7 ) are release holes formed by pins ( 14 ) provided in a mold die to support the resin member ( 2 ) in spaced relationship with the mold die during molding of the rubber member ( 3 ),
wherein the rubber member comprises a projecting portion ( 8 , 31 ) that projects away from the one of the faces ( 2 a , 2 b ) at the outer edge of the resin member, and
the holes are formed in the rubber member along a projection face ( 8 a , 31 a ) of the projecting portion ( 8 , 31 ).
2. The composite molding according to claim 1 , wherein the plurality of holes are formed in the rubber member at equal intervals along the projection face of the projecting portion.
3. The composite molding according to claim 1 , wherein the outer edge of the resin member forms an elbowed bent portion, and
the projecting portion projects from the one of the faces of the resin member at the position of the bent portion.
4. The composite molding according to claim 1 , wherein the projection face of the projecting portion of the rubber member comprises wide portions formed at equal intervals along a circumferential path of the projecting portion, and
the holes are formed in the wide portions.
5. The composite molding according to claim 1 , wherein the projecting portion comprises an inner wall surface serving as a guide surface for another member.
6. The composite molding according to claim 1 , wherein the composite molding is a diaphragm.