| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold, the air in the cavity of which can be quickly discharged outside. SOLUTION: On the inner peripheral surfaces of an upper and a lower mold pieces 10 and 40, fitting surfaces A1 to A5 and B1 to B5, pressing surfaces 12 and 42 for pressing molding material, a molding recessed part 22, in which the pressed molding material is spread and filled, and a space at a stepped part 43 are formed. In the upper and the lower mold pieces 10 and 40, a main steel ventilating plate 54, a circular ventilating plate 55, a sword-shaped ventilating plate 60 or the like are installed. At pressing, the air within the pieces is discharged outside through the ventilating ports 54a and 55a and slits 60a of the plates 54, 55 and 60.
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