| 摘要 |
PURPOSE:To contrive to improve the joint strength and watertightness of a resin composite pipe by a method wherein the end face, which faces into a socket part, of a synthetic resin pipe is covered with outer layer constitutional material and, at the same time, the synthetic resin end face at a spigot part is covered with the outer layer constitutional material. CONSTITUTION:Core pipe D has grooves 164..., which are formed on the socket forming parts 161... or socket forming connecting members 16... and grooves 175... of spigot forming connecting members 17... and the surface of the core pipe D is made smooth by burying the grooves 164 and 175 with proper filler. The core pipe D is fed to a stock pipe making means 2 so as to produce resin composite stock pipe E by forming outer layer constitutional material layer onto the outer peripheral surface of the core pipe. In addition, the outer layer constitutional material 20 also enters in gaps S and W, which are respectively ensured just before the end faces of synthetic resin pipe C by midget stoppers 167, 168, 176 and 177 of the respective connecting members 16 and 17. As a result, the end faces of the synthetic pipes C... are covered with the outer layer constitutional material 20. A cutting means 4 cuts off the resin composite stock pipe E, which is fed out of a stock pipe take-off means 3, at their cutting positions or the connecting sites of the synthetic resin pipes C.... |
