Joint member manufactured using pipe and manufacturing method of the same

Abstract

A method for manufacturing a joint member, which includes a retaining portion formed by pressing a stainless steel pipe that is cut into a predetermined length, a joining portion having a spiral portion or a spiral groove, and an insert member made of synthetic resin and being pressed into the pipe so that a packing and a compression ring can be located in a proper position. The joint member using a pipe includes: a metal member having a retaining portion formed by pressing a stainless steel pipe cut into a predetermined length and a joining portion formed on the stainless steel pipe; and an insert member made of synthetic resin, the insert member being pressed to the retaining portion and mounted on the inner circumference of the metal member to locate joint means in a proper position.

What is claimed is: 
     
         1 . A method of manufacturing a joint member using a pipe comprising:
 a press-molding process of manufacturing a metal member of half-finished goods by pressing a stainless steel pipe, which is cut into a predetermined length, to form a retaining portion; a screw forming process of forming a joining portion on the metal member of the half-finished goods; and an insert press-in process of pressing an insert member, which is made of synthetic resin material, to the retaining portion.   
     
     
         2 . The manufacturing method according to  claim 1 , wherein the press-molding process includes a first press-molding process of molding the retaining portion; and a second press-molding process of molding a nut portion on the outer circumference of the pipe. 
     
     
         3 . The manufacturing method according to  claim 1 , wherein in the first pressing process, a small diameter portion is extendedly formed on the nut portion.