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We have brought to the market injection molding machines which have non-contact center press mold clamping for higher-accuracy mold clamping. This mold clamping consists of electromagnetic molding device. However, it is difficult to tune control parameters for this molding device due to eddy current that occurs inside electromagnet. In this paper, we propose a mathematical model for the electromagnet placed inside molding device. The frequency and time responses of proposed model have corresponded with both responses of experimental results. We have also designed the control parameters of the actual machine by using this mathematical model. The experimental results have agreed with the numerical calculation results obtained from the model. Hence, the availability of the proposed model has been confirmed. By designing the control parameters with the proposed model, it is possible to control the mold clamping force more accurately.
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