| 摘要 |
PURPOSE:To enable a molding of FRP or the like having various parts in wall thickness to be manufactured efficiently by constituting a mold part corresponding to the wall thickness part of a molding with a high heat conductive material, and also constituting a mold part corresponding to the thin wall part of a molding with a low heat conductive material. CONSTITUTION:An upper mold part 11 and a lower mold part 21 corresponding to the wall thickness part (bottom part) in a bathtub-shaped molding are composed of a low heat conductive material such for example as an aluminum alloy (heat conductivity 130-140Kcal/m.h. deg.C). An upper mold part 12 and a lower mold part 22 corresponding to the thin wall part (side wall part) in the bathtub-shaped molding are comprised of a low heat material such for example as mechanically constitutional carbon steel (heat conductivity 31-46Kcal/m.h. deg.C). Besides, in the upper mold parts 11, 12 and lower mold parts 21, 22, a great number of pipe conduits 13 and 23 are formed which are adapted to pour a heat medium and then heat the molds at constant temperature. |
