| 摘要 |
<p>PURPOSE:To form a socket and seal a perforated plastic tube simultaneously, by positioning a resin-injecting jig on a core metal, sliding the perforated tube, being heated, on the core metal to insert its top end into the inlet of the jig, and injecting a thermofusible resin into a cavity inside the top end of the tube through the jig. CONSTITUTION:A jig 3 is positioned at a prefered position on a core metal 1, and the top part 20 of a perforated tube after heated is slided on the core metal 1 to insert the topmost end 200 closely into the inlet 30 of the jig 3. Thereafter, a nozzle 4 is attached to the resin-injecting hole 33 of the jig 3. A thermofusible resin 5 is injected through the nozzle 4 for a prefered period, to pack a fixed amount of the resin in the cavity of the top part 20 of the tube. Thereafter, the nozzle 4 is detached from the jig 3, the jig 3 is separated from the top end of the tube, the end part 20 of the tube is cooled to contract the core metal 1, and the end part 20 of the tube is released from the core metal 1. The hole in the top end surface of the socket is sealed at the same time when the end part of the perforated tube is formed into the socket. Besides, the thermal adhesion of the sealing resin to the inside surface of the tube is assured, and a water-tightness excellent in a sealing property can be obtained.</p> |
