| 摘要 |
PROBLEM TO BE SOLVED: To achieve miniaturization, price reduction, and energy saving of a resin molding apparatus to reduce running cost.SOLUTION: An electric motor 19 is used which has a built-in brake 20 and a necessary and sufficient rated torque Tr to complete operation (mold clamping) of contacting mold surfaces of a molding die 10 with each other. The instantaneous maximum torque Tmax of the electric motor 19 is 2 times or more and 3 times or less the rated torque Tr thereof, and the holding torque Th of the built-in brake 20 is not less than the instantaneous maximum torque Tmax of the electric motor 19. After completing the clamping of the molding die 10 by a torque not larger than the rated torque Tr, the built-in brake 20 is turned on and the electric motor 19 is turned off in a state of mold clamping by a mold clamping pressure for a predetermined molding time T (for example, 3 s) by a short-time driving torque larger than the rated torque Tr and not larger than the instantaneous maximum torque Tmax. A fluid resin 12 is cured by maintaining the mold clamping state by turning the built-in brake 20 on for a predetermined curing time.SELECTED DRAWING: Figure 2 |
