Mold opening/closing speed control device

A mold opening/closing speed control device in an injection molding apparatus having molds, comprising:

• teaching/operation mode selecting means, manually operable by an operator, for selecting either a teaching mode for teaching an acceleration/deceleration position of a mold opening/closing speed, or an operation mode for opening/closing molds;
• teaching means, manually operable by the operator, for setting the acceleration/deceleration position;
• memory means for storing the acceleration/deceleration position set by said teaching means;
• mold driving means, including a servo motor as a drive source, for moving the molds with respect to one another;
• position detecting means for detecting a moving position of the molds;
• and
• control means for determining whether either the teaching mode or the operation mode is selected by manual operation of said teaching/operation mode selecting means, for determining whether said teaching means is manually operated, for controlling said mold driving means to cause the molds to move at a low speed when said control means determines that the teaching mode is selected, for controlling said memory means to store therein a mold position detected by said position detecting means at the time said control means determines that the teaching mode is selected and that said teaching means is manually operated, and for controlling said mold driving means so that the opening/closing speed of the molds is controlled in accordance with the mold position stored in said memory means when said control means determines that the operation mode is selected.