| 摘要 |
PROBLEM TO BE SOLVED: To mold a molding having uniform properties such as weight and size in a middle cavity and a peripheral cavity. SOLUTION: The thickness of a cavity 48 is made larger than that of the cavity 48 positioned in the middle part by the cavity 48 positioned in the vicinity of the abutting surfaces of a fixed mold 46 and a movable mold 47. The thickness of a molded product is about 1 mm, but the difference in thickness is about 0.02 mm. The fixed mold 46 and the movable mold 47 are warped by a resin pressure during molding to be separated from each other on the middle part side of the abutting surfaces 46a, 47a of the moldings 46, 47. However, by setting the thickness of the cavity 48, the practical thickness of each cavity during the packing of the resin is made equivalent.
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