METHOD FOR PRODUCING TUBE RESIN JOINT AND TUBE RESIN JOINT PRODUCED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a tube resin joint which improves sealing properties by uniformly fusion-bonding the molding parts of the joint side terminal part of a tube and a resin joint member and makes the design of the shapes and wall thicknesses of a heating tube and a joint part have a degree of freedom and the tube resin joint produced by the method.;SOLUTION: First, a core bar 4 of the same diameter is inserted by a prescribed length into the joint side terminal part 1a of a tube body 1, the vicinity of the joint side terminal part 1a of the tube body 1 is set in an approximately middle part between the upper mold 3a and lower mold 3b of a split mold 3, and the molds are clamped. After that, the joint side terminal part 1a of the tube body 1 and a space part X between the core bar 4 and the split mold 3, namely a molten resin material W is injected from an injection hole 5 into molding recesses 6a and 6b for molding the connection part 2a and screw connection part 2b of the joint member 2. After the curing of the resin material W, the split mold 3 is released while being divided, and a product Wx in which the tube body 1 and the joint member 2 are integrated is demolded from the split mold 3. The core bar 4 is extracted from the joint side terminal part 1a of the tube main body 1 to finish molding work.;COPYRIGHT: (C)2005,JPO&NCIPI