| 摘要 |
PROBLEM TO BE SOLVED: To reduce short shots when mass production is started or restarted by a method in which after the measured temperatures of places reach a prescribed temperature or above, injection molding is implemented while a cooling medium from a mold temperature regulator is introduced into a mold. SOLUTION: In a mold temperature regulator 3, a valve is changed over to the first state in which after the actuation of an apparatus, a cooling medium is supplied always to a mold cooling apparatus 2 through a cooling medium supply passage 4 or to the second state in which the cooling medium supplied from the regulator 3 is returned to a cooling medium returning passage 5 through a bypass passage 9. In this process, when a mold temperature is increased gradually by the packing of a molten resin after the start of molding, when one of the detection signals of temperature sensors 6 reaches a prescribed mass production-possible target temperature, the cooling medium is introduced into a mold 1, and injection molding is implemented.
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