| 摘要 |
PROBLEM TO BE SOLVED: To provide a foam molding method for a thermoplastic resin capable of reducing post-foam suppression cooling time for imparting the strength to skin layers capable of withstanding foam pressure.SOLUTION: In the first step, in a state where a foamable molten resin 55 obtained by mixing a thermoplastic resin 75 with a foaming agent is filled into a die cavity 30 between upper and lower dies, foaming is performed with the foaming agent. In the second step, skin layers 50 by cooling is formed at the faces in contact with the upper and lower dies in a core layer 40 in a state where the foaming is performed with the foaming agent. In the third step, after the formation of the skin layers 50, die removal is performed to obtain a molded part 60. The foamable molten resin 55 includes a thermal conductivity improving material 70 made of metal.SELECTED DRAWING: Figure 1 |
