| 摘要 |
PROBLEM TO BE SOLVED: To provide a molding apparatus in which upon operation's changing over from one to the other at each step, a shock, which occurs due to a change of the number of revolutions of a motor, is reduced.SOLUTION: The molding apparatus includes: a pump unit 70 capable of operating in parallel a first hydraulic pump unit 71 having a first hydraulic pump to be driven by a first driving motor 30 and a second hydraulic pump unit 72 having a second hydraulic pump to be driven by a second driving motor 31; a hydraulic circuit 33 for supplying the pressure oil to be discharged from the pump unit to a hydraulic drive unit to be arranged in the molding apparatus; and control means 34 for controlling the first driving motor and the second driving motor. At a step of including a low-speed operation and a high-speed operation at one step, when the low-speed operation is conducted, the first driving motor is controlled to have the first number of revolutions and when the high-speed operation is conducted, the first driving motor is controlled to have the second number of revolutions, the second number being lower than the first number of revolutions, and the second driving motor is controlled to have the third number of revolutions, the third number being lower than the first number of revolutions. |
