| 摘要 |
PURPOSE:To easily fabricate a helical clearer, in extruding gelled resin while passing the same through a mold, by changing and inclining an extrusion pressure direction by the structure of the mold. CONSTITUTION:In extruding gelled resin from a mold 2 by an extruder 1, the extrusion pressure direction thereof is changed and inclined by the action of the spiral grooves provided to a tube forming cylinder part 3 and a tube 5 is rotated by its own force by utilizing said extrusion pressure direction. In the next step, the rotated tube 5 is held to an angle same to the extrusion changing and inclination angle by a fixing jig 8 while a twist is imparted to the tube 5 by the tensile force of a take-up roller 11 and cooled in a cooling water tank 6 in this state to be molded and fixed as a tube 7. In addition, the cured tube 13 is coincided with the grooves 9 of the helical clearer passing orifice 10 of the fixing 8 at the spiral protruded ribs provided to the outer peripheral surface thereof and passed while rotated to be drawn out from a pull-roller 11. |
