The invention relates to the production of a textured moulding cavity, in particular for the moulding of elastomer parts with surface texturing. This method is based on the acquisition of a texture from a natural model whose surface condition is to be reproduced on an elastomer part by overmoulding the model between two calendered sheets of elastomeric material and vulcanization for a period between 20 minutes and 60 minutes at a temperature between 80 C. and 200 C. The invention also relates to a moulding cavity made of elastomeric material thus obtained and a method for moulding a textured elastomeric part obtained by vulcanization in the cavity of the invention of a sheet of raw calendered elastomeric material on a base element of the same partially vulcanized elastomeric material. Finally, the invention relates to a textured elastomer part obtained with the inventive moulding method.

In the ultrasonic welding method, ultrasonic vibration is imparted to a first resin member via a horn while applying a pressing force to the first resin member and a second resin member in which weld portions and come into contact with each other by using a jig for supporting the second resin member and the horn that is disposed to face the jig and in contact with the first resin member so as to weld the first resin member and the second resin member, in which a jig of which a support surface for supporting the second resin member is formed of an elastomer is used as the jig.

In the ultrasonic welding method, ultrasonic vibration is imparted to a first resin member via a horn while applying a pressing force to the first resin member and a second resin member in which weld portions and come into contact with each other by using a jig for supporting the second resin member and the horn that is disposed to face the jig and in contact with the first resin member so as to weld the first resin member and the second resin member, in which a jig of which a support surface for supporting the second resin member is formed of an elastomer is used as the jig.

In the ultrasonic welding method, ultrasonic vibration is imparted to a first resin member via a horn while applying a pressing force to the first resin member and a second resin member in which weld portions and come into contact with each other by using a jig for supporting the second resin member and the horn that is disposed to face the jig and in contact with the first resin member so as to weld the first resin member and the second resin member, in which a jig of which a support surface for supporting the second resin member is formed of an elastomer is used as the jig.

In the ultrasonic welding method, ultrasonic vibration is imparted to a first resin member via a horn while applying a pressing force to the first resin member and a second resin member in which weld portions and come into contact with each other by using a jig for supporting the second resin member and the horn that is disposed to face the jig and in contact with the first resin member so as to weld the first resin member and the second resin member, in which a jig of which a support surface for supporting the second resin member is formed of an elastomer is used as the jig.

A heat sink for use in electromagnetic welding of molded parts includes reinforcing fibers embedded in a matrix material, where substantially all of the reinforcing fibers are oriented unidirectionally in a fiber direction, where the reinforcing fibers have a thermal conductivity at room temperature from 100-1000 W/m. K and an electrical resistivity at room temperature from 0.5-10.m, and where the matrix material comprises a high temperature resistant material, optionally a thermosetting resin, having a glass transition temperature Tg above 350 C. The heat sink is used in a method of connecting surfaces of a first molded part and a second molded part by electromagnetic welding. Cooling of the outer surface of the first molded part is provided by the heat sink in direct contact with the outer surface.

A heat sink for use in electromagnetic welding of molded parts includes reinforcing fibers embedded in a matrix material, where substantially all of the reinforcing fibers are oriented unidirectionally in a fiber direction, where the reinforcing fibers have a thermal conductivity at room temperature from 100-1000 W/m. K and an electrical resistivity at room temperature from 0.5-10.m, and where the matrix material comprises a high temperature resistant material, optionally a thermosetting resin, having a glass transition temperature Tg above 350 C. The heat sink is used in a method of connecting surfaces of a first molded part and a second molded part by electromagnetic welding. Cooling of the outer surface of the first molded part is provided by the heat sink in direct contact with the outer surface.