| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a branch joint molding method constituted so as not only to ensure the necessary minimum branch flow rate of air or the like by holding the inner diameter of the branch port of a branch passage hole to a constant caliber even if burr is produced but also to simply perform the occurrence inspection work of burr or the removal work of burr, and a mold therefor. <P>SOLUTION: In the mold for molding a branch joint 1 having an almost straight main passage hole 1a and the branch passage holes 1b and 1c branched from the midway part of the main passage hole 1a, a core 6 for the main passage hole 1a for molding the main passage hole 1a and cores 7A and 7B for the branch passage holes 1b and 1c, which connect the end parts 7a (or fine diameter parts 7b) of the cores 7A and 7B to the outer surface of the core 6 for the main passage hole 1a to mold the branch passages holes 1b and 1c, are arranged between an upper mold 2 and a lower mold 3 both of which mold the outer surface part of the branch joint 1 to form recessed parts (cavity parts 6b or hole parts 6a), which permit the insertion of the end parts 7a (or fine diameter parts 7b) to connect the end parts 7a, to the outer surface of the core 6 for the main passage hole 1a. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
