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    • 8. 发明专利
    • HEATING METHOD OF SLUSH MOLD
    • JPH04164610A
    • 1992-06-10
    • JP29134990
    • 1990-10-29
    • HONDA MOTOR CO LTD
    • NAKAGAWA TAKESHIHIRANO NOBORUMORI CHIAKISAEKI KENJI
    • B29C41/40B29C41/18B29C41/46B29C41/52
    • PURPOSE:To heat a mold uniformly in short cycle time by a method in which a slush mold is preheated by hot blast and is heated to prescribed allowable temperature range for molding by radiation heating and then its preheating temperature is controlled. CONSTITUTION:A mold 12 is one step-heated by hot blast in a first heating station 13, and the mold 12 is heated to prescribed preheating temperature in short time at less temperature-difference. The mold 12 is two steps-heated by a burner 42 in a second heating station 14 and is heated to the range T of the allowable temperature for molding in short time at less temperature difference. Then, the preheating temperature of the mold 12 heated by one step heating is set to be higher than the heating temperature T1 at the part where the time axis corresponding to the time t2 wherein radiation heating time(t) of second step is subtracted from the heating time t1 of temperature- raising curve D2 at the shortest heating time in which the mold 12 may be heated to the allowable temperature range for molding by only radiation heating, crosses the temperature-raising curve D2. Accordingly, the mold 12 is one step- heated to the set preheating temperature and then is radiation-heated exactly to the allowable temperature range T for molding through the two steps-heating.