| 摘要 |
PROBLEM TO BE SOLVED: To easily change a surface hardness and thereby making it possible to make a molding with a partially different hardness by constructing the force molding face for forming a molded face of a bottom force by using a gas-permeable material, and making it possible to adjust the inner pressures of plural independent pressure chambers, independently of each other, part of each of the intrachamber walls of which is shared by the part of the force molding face for forming the molded face on the back face side of the bottom force. SOLUTION: A skin 21 is set on a bottom force 3 and the appropriate pressure chambers 7a-7g are adjusted to design values through pressure valves 82-8g. The pressure chambers 7a-7g corresponding to the areas, of the skin-monolithically molded sheet as a finished product, which are desired to be relatively harder, are set at a lower pressure than a foaming pressure and the pressure chambers 7a-7g corresponding to the areas, of the sheet, which are desired to be relatively softer, are set at a higher pressure than the foaming pressure, as the previous settings respectively. A top force 2 is clamped and a stock foamable resin solution is injected into the cavity and foams. After part of the stock solution penetrates the lining material of the skin 21 following its foaming, the top force 2 is opened and a foamed pad 15 is released from the mold with the skin 21 remaining as it is. Thus it is possible to freely change the surface hardness of the sheet and easily realize the optimal sheet retaining capability even on the mass-productive base at a low manufacturing cost. |
