| 摘要 |
PURPOSE:To shorten the cooling time of the central portion of a molded part by a method wherein the pouring of resin in a molding space is performed in lamination in two steps or more. CONSTITUTION:Firstly, resin is poured through a gate 7 in order to form a first layer 9. Secondly, when the first layer cools down to some extent, a pressing mold 3 is lowered and resin is poured through the gate 7 on one side of the first layer 9 in order to form a second layer 10. Thirdly, when the second layer cools down to some extent, the pressing mold 3 is further lowered and resin is poured through a gate 8 on the other side of the first layer in order to form a third layer 11. Because the molding is performed by dividing the pouring of resin in two steps or more, the cooling of each layer is quick and consequently the temperature drop in the central portion can be accelerated. |
