US Patent 7488438 Molding machine and control method thereof

A molding machine according to the present invention includes a plurality of drive mechanisms driven by servo motors and a controller for controlling the respective drive mechanisms. According to the present invention, the plurality of drive mechanisms are divided into at least two groups. At least one of the two groups includes a plurality of drive mechanisms to be synchronized. The controller controls the at least two groups while establishing synchronization among the drive mechanisms included in the at least one of the two groups.