| 摘要 |
PURPOSE:To increase cooling efficiency of a resin mold of poor heat conductivity and enhance the productibity of injection molded products by using resin only, fine Cu or Al grains of a given diameter, or a material containing powdery grains of an ally of the metals for the mold surface, and epoxy resin containing powdery grains of metal or alloy for a second layer, and providing a metal continuous body such as a net, a rod, a tube or the like for the other layers. CONSTITUTION:A wax model is covered with a resin layer 3 as thin as possible. Its outer periphery is lined with an epoxy resin second layer 4 containing aluminum powder, of average diameter of 50mum or less, aluminum grains or the like. A metal continuous body 2 such as a cooling pipe or the like is provided through the second layer. Further, an aluminum mold 1 of good heat conductivity is used for the outer periphery. heat conductivity of a resin mold for lost wax can be improved to shorten the wax molding cycle. |
