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Injection molding machines are capable of producing plastic articles economically and in bulk and are thus considered essential in various industries, including electrical appliances, foods and automobiles. Early forms of injection molding machines were mostly of the hydraulic type. To meet energy saving requirements, approximately 80% of molding machines manufactured in Japan today are fully electrically powered. We have been able to establish the technologies for a low-inertia, high-response motor and an intelligent servo control system by maximizing motor efficiency while exploiting our strength in self-developing and self-producing motors and servo drivers. This paper describes the developments leading to energy saving achieved by our company, and the energy-saving effect of the new molding system "Zero-molding," which has been developed by utilizing our technology for full electric molding.
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