| 摘要 |
PROBLEM TO BE SOLVED: To cool a molding surface of a mold by controlling to heat a compressed gas of a chamber to a temperature invariable in a heating temperature range of the mold, and controlling to open or close a valve for spraying the gas from the chamber to a molding. SOLUTION: A mold 2 constitutes a split mold 3 which can be opened in its molding cavity 5 partly formed at a core mold 8. A compressed gas is sprayed from a chamber 30 to a molding S molded in the cavity 5 of the mold 2 to release the molding S. In this case, an openable/closable valve 42 provided in a passage 11 for spraying the gas from the chamber 30 to the molding S is provided. At the time of spraying the gas to the molding S, a temperature controller 20 controls to heat the gas of the chamber 30 to a temperature invariable in a heating temperature range of the mold 2 to control opening and closing of the valve 52 for spraying the gas from the chamber 30 to the molding S. |
