| 摘要 |
PROBLEM TO BE SOLVED: To certainly remove a drain which remains in a mold, by setting one of molds to an upper mold and setting the other one of them to a lower mold at least on the way of steam heating or before foaming of foamable beads. SOLUTION: After foamable beads 7 are steamed, that is, on the way of steam heating and before foaming of foamable beads 7, one mold 3 is set to an upper mold and other mold 4 is set to a lower mold. The pressure reducing valve B2 connected to the chamber 4b of the other mold 4 is opened to evacuate a mold 6 from a steam hole 4c. By this constitution, gravity is rather utilized without opposing gravity to make it possible to simply suck out drain from the low steam hole 4c. Therefore, drain can be certainly removed. |
