| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology which more easily manufactures a resin pipe joint including an inside corner formed into a circular curved surface without requiring additional machining such as welding and cutting. SOLUTION: Concerning this mold to be used for injection molding, an inner cylindrical body 11 formed into a circular shape in a surface to be brought into contact with the inside corner 16 of a joint is inserted into the mold according to an arrangement figure of the inner cylindrical body and an outer package body (corresponding to the joint as a final product). The inner cylindrical body 11 is preferably made of silicon easy to be peeled from the outer package body 12. A core pin 19 is inserted to prevent the inner cylindrical body from being crushed. A fluorine resin, for an example, is filled around the inner cylindrical body 11 to form a pipe joint. A molded product is taken out of the mold, and the core pin 19 is eliminated, and thereafter, the inner cylindrical body 11 is removed, and the outer package body (pipe joint) including the inside corner 16 formed into a circular curved surface can be thereby obtained. COPYRIGHT: (C)2011,JPO&INPIT |
