| 摘要 |
PURPOSE:To butt-weld thermoplastic resin pipes without causing stepped part in the joint, by welding thermoplastic resin pipes of reformed round cross sections to be welded together with a given pressure applied. CONSTITUTION:The movable clamp 3 is fixed on the bed plate 1 at a proper distance from the fixed clamp 2, and the upper halves of the clamps 2 and 3 are opened to set the thermoplastic resin pipes projected from the sides of the clamps 2 and 3. The upper halves of the clamps 2 and 3 are then closed to hold the pipes 5, whose ends are reformed into round cross sectional shapes by the pressure applied to the end outer walls with the plural adjusting bolts 21 and 31 on the clamps 2 and 3. The radius of gyration of the cutting tools 61 of the rotating chamfering machine 6 is adjusted to the radius for the cutting and chamfering, and the tools 61 are rotated to cut and chamfer the pipe ends simultaneously. The machine 6 is then removed, and the hot plate 7 is inserted between the pipes 5. The pipe ends are pressed to the hot plate 7 by the pressing machine 4 under a given pressure, locked by the locking device 44, and butt-welded. |
