| 摘要 |
PURPOSE:To provide a method for molding of pipes having a large contact surface from which conventional defects are removed. CONSTITUTION:In a molding method wherein thermoplastic resin or the like kneaded in an extruding part is extruded from a die 4, the die 4 is inserted inside an inner surface of an outer cylinder 7 so that an outer surface of an inner pillar 8 has a clearance through which the resin or the like is passed to the inner surface of the outer cylinder 7, and an inner channel 9 or an outer channel 11 through which the resin or the like is passed is bored on at least either of the inner surface or the outer surface. |
