Injection molding process and injection mold with a local pressure structure

摘要

PROBLEM TO BE SOLVED: To obtain an injection-molded product of high precision by enhancing the positional precision of a center pin in an injection molding local pressing mold.;SOLUTION: This injection mold is constituted so as to obtain a molded product 10 having a columnar shaft holes 10a and a surface 15 in a lateral direction with respect to columnar shaft holes 10a and provided with the columnar center pin 12 for forming the shaft hole 10a and a local pressing pin 1 consisting of the annular sleeve piece 4 provided in a concentrical annular state with respect to the center pin 12 in order to press the surface 15 and a plurality of rod-shaped pressure transmission pins 5 provided in order to press the sleeve piece 4.;COPYRIGHT: (C)2005,JPO&NCIPI