| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for molding hydraulic material having large mold cost reduction and excellent mass productivity. SOLUTION: A porous ventilating mold is covered with a heated thermoplastic resin film 13, sucked to a shaping surface of a cavity of the mold, and a convexo-concave shape is transferred by plastic deformation. Then, concrete S is charged, excited and compacted. Thereafter, a normal plate 15 having vent holes is matched, vacuum evacuated to vacuum seal a molding with the plate 15 and the film 13 and the molding is mold released. After the releasing, the film 13 is pulled and rubbed. Then, the molding S is transferred to a curing board 18 having a protruded bent surface 18a, and cured thereon. The plate 15 is superposed on a back surface side of the molding, enclosed with the film 13 as it is and mold released together. Then, since a lump of the molding is restricted by the plate 15, the lump of the molding can be mold released without mold collapse as an elastic lump of compacted state reduced by the expandable film 13. And, it can be bent plastic deformed without impairing the molding surface by transferring immediately after mold releasing. |
