MOLD FOR SOLID PHASE MOLDING OF PLASTIC TUBULAR OBJECT

摘要

PURPOSE:To prevent the shift of a center and obtain the tubular object of an excellent mechanical strength and a good superficial smoothness, by providing a through hole from the tip to the end at the center of an inner mold in the mold composed of an outer mold and the inner mold which molds a plastics tube like in the state of a solid phase. CONSTITUTION:When a plastics is molded tube like in the state of a solid phase, a tubular molded product A is manufactured by extruding a plastic stock B with a piston head 4 using the mold 1 which is composed of an outer mold 1a and an inner mold 1b, also the center of the inner mold 1b being provided with a through hole 2 from its tip to its end. The shift of the center of the inner mold is prevented during a molding by this, and the tubular object of an excellent mechanical strength and a good superficial smoothness can be obtained.