Patent ID: 7699950
Filing Date: 2010-04-20
Classification: B29C,B29K

Abstract:
1. An ultrasonic bonding method for bonding a rubber member having a roughened rubber bonding surface of a predetermined roughness and a resin member made of a thermoplastic resin having a roughened resin bonding surface of a predetermined roughness, comprising: setting the rubber member and the resin member to form a bonding interface therebetween by connecting the roughened rubber bonding surface and the roughened resin bonding surface; applying ultrasonic vibrations to the bonding interface from a side of the rubber member to thereby fuse only the resin member by friction heat generated in the bonding interface and to thereby force fused resin into the rubber member; and solidifying the fused resin to mechanically bond the rubber member and the resin member by imparting an anchoring effect produced by entanglement of the rubber member and the resin member in the bonding interface, wherein the degree of surface roughness of the roughened resin bonding surface is in a range of Rz10 to 50 μm, a hardness of the rubber member is in a range of Hs50 to 80, as measured by Shore A hardness, and a thickness of the rubber member in an oscillating direction of ultrasonic vibrations applied is in a range of 0.5 to 5 mm.