JOINT FORMING METHOD AND MOLDING DIE

摘要

PROBLEM TO BE SOLVED: To facilitate piping of a resin pipe difficult to joint with an adhesive. SOLUTION: An end part of a previously formed resin pipe 1 is inserted close into a joint forming cavity 4b formed in a molding die 3, and resin of the same quality as the resin pipe 1 is injected into the cavity 4b so as to form a joint 2 integrally welded to the resin pipe 1 through the cavity 4b. The joint 2 is connected by a bolt or the like to make piping possible, so that even the resin pipe 1 difficult to joint with an adhesive can be easily conducted piping.