| 摘要 |
PURPOSE:To obtain a resin molded material whose formal accuracy is favorable, by cooling the resin molded material by providing an after barrel on the tip part of an outlet of the resin. CONSTITUTION:A thermosetting resin material supplied through a hopper 1 is heated and melted within a cylinder 2 by a heater 3, shifted to a smooth part 5 through the tip part of a flight of a screw 4, a gap part to be generated by the screw flight is narrowed and fused through pressure. Then the fused resin is shaped to such an extent as to hold its own form while shifting along the smooth part of the screw. In this instance, back pressure is applied to the resin by back pressure applying equipment 6 fitted to the tip of the cylinder, the resin is fused sufficiently with pressure, shaped and extruded by turning into a tubular molded product 8 through the tip of the cylinder, back pressure applying equipment and after barrel 7. The after barrel possesses about the same inside diameter as that of the cylinder of an extruding machine, which is provided with a jacket and possesses structure quenchable through flowing of cooling water. |
