| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold mechanism of an injection molding which can smoothly detach a core from a molded article when injection molding the molded article with a shape having continued non-circular arc shaped mouth hole whose axis line is not circular arc on the mouth part of the circular arc shaped pipeline, in which the cross section is larger than a circular arc shaped pipeline, and the usage thereof. SOLUTION: The mold mechanism is equipped with a circular arc shaped core 11 which is formed to be the shape corresponding to a hollow shape of the circular arc shaped pipeline 2 for molding the circular arc shaped pipeline 2 and turnably provided in the direction for retracting outward around the central position of the circular arc as a center, and a core 15 for the mouth hole which is formed to be the shape corresponding to the hollow shape of the mouth hole 4 for molding the mouth hole 4 and provided so as to be moved forward and backward in the direction for retracting outward from the inside of the mouth hole 4. The circular arc shaped guide hole 18 for passing the circular arc shaped core 11 is formed on the core 15 for the mouth hole. After the circular arc shaped core 11 is pulled out from the inside of the circular arc shaped guide hole 18 formed on the core 15 for the mouth hole, the core 15 for the mouth hole is retracted from the inside of the mouth hole 4. COPYRIGHT: (C)2008,JPO&INPIT |
