| 摘要 |
PROBLEM TO BE SOLVED: To simplify the draw of an insert from the undercut part of a molded article, to facilitate obtaining a mold at a low cost, and to improve the molding accuracy of the molded article and the productivity and yield of the product. SOLUTION: At the time of the mold opening operation after the injection molding of the impeller 1, the drawing-out of the insert 226 from the mold is behorehand conducted, which insert 226 is for the shaft hole 2 of the impeller 1 which is a cut shape other than the undercut part of the impeller 1. Then by moving at a fixed speed the fixed side platen 223 and the movable side platen 244 to the direction for the two to separate relatively, the vector V1 of the separating direction is made to occur between the contact surfaces of the fixed side insert 225 and the movable side insert 247 and the V-shaped blade. By a component force generated by making a force corresponding to this vector V1 act on the V-shaped blade, the impeller 1 is turned to the circumferential direction, and by this the fixed side insert 225 and the movable side insert 247 are simultaneously drawn out from the blade grooves 3a, 3b that are the undercut parts of the impeller 1. COPYRIGHT: (C)2007,JPO&INPIT |
