| 摘要 |
In a known control method, a large deviation between the temperature of a heating plate and a temperature-setting pattern occurs, and an overshoot or undershoot occurs. Therefore, a workpiece is unstably formed, the number of defective parts is increased and the productivity is decreased. Any two temperatures from among the temperature of the heating medium in the inlet manifold 5 that distributes and supplies the heating medium to each heating plate, the temperature of the heating medium in the outlet manifold 8 that collects the heating medium discharged from the heating plates 4 and the temperature of the heating plates 4, are detected. Then, a temperature value is obtained by selecting any one of the two temperatures based on a temperature-setting pattern 16, or is obtained by obtaining a weighted average of at least two temperatures from among the three temperatures based on preset weights. The temperature value is feedback-controlled so as to be identical to the temperature-setting pattern 16 of the heating plate 4.
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