| 摘要 |
PURPOSE:To improve appearance by letting the curing of moldings to be completed while keeping a close contact state of a cast mold inner surface and a moldings outer surface. CONSTITUTION:Cast mold plates 2a,2b are vertically provided to be faced to each other, and an elastic tube 8 is put on to be held among either side periphery of the cast mold plates 2a,2b and the bottom periphery, and a cast mold 1 is constructed by being held from the outside by means of clamps. In the next place, a liquid material 6A is filled into a cast mold space 3 from the upper opening of the cast mold 1. Then the cast mold 1 is soaked into the liquid within a liquid vessel in a state wherein the upper opening sticks out of the liquid level. Next, the whole of the cast mold 1 is heated through heating the liquid within a liquid vessel for promoting the polymerization reaction of the liquid material 6A. Following the procession of polymerization, the liquid pressure exerting respective inner surfaces of the case mold plates 2a,2b starts to decrease, finally, it cures, and further the volumetric shrinkage thereof begins afterwards. Monitoring the gelatinization proceeding state of the liquid material 6A, the pressurized fluid within the elastic tube 8 is derived so as to be made a pressure lower than the liquid head pressure in the liquid vessel. In subsequence thereof, the cast mold 1 is removed out of the liquid vessel, and after-cure is then performed, following this, the cast mold 1 is decomposed for recovering moldings. Thus, moldings with a beautiful appearance and high dimensional accuracy can be obtained. |
