| 摘要 |
PURPOSE:To make leakage of an internal liquid and separation of a synthetic cap hard to occur, by a method wherein injected mixed rubber is forced into a connection member from another end side of the connection member, and a synthetic resin cap is applied on the other end side of the connection member to join an outer circumferential surface of the connection member and an internal surface of the synthetic resin cap by a high frequency welding or an ultrasonic welding. CONSTITUTION:Among open ends of a connection member 1, the end cut open is connected to a liquid transfer tube. Injected mixed rubber 2 is forced from the side of the other open end 1a of the connection member 1. The injected mixed rubber 2 is kept liquidtight between an inner circumferential surface of the connection member 1 and an outer circumferential surface thereof 2 as forced into the connection member 1. Then, with the injected mixed rubber 2 being forced into the connection member 1, a synthetic resin cap 3 comprising soft vinyl chloride is applied. Covering the connection member 1, the synthetic resin cap 3 is inserted into a high frequency welder 4. The high frequency welder 4 is so arranged to grasp insulating members 5 and 6 between electrodes 7 and 8, 9 and 10, respectively. This achieves a higher joining strength between the synthetic resin cap and the connection member. |
