Injection molding machine and method of controlling the same

A method of controlling an injection molding machine that molds a product for each execution of a molding cycle through an injecting process of injecting a material into clamped molds, a dwell process of controlling dwell pressure of the material in the molds, and a cooling process of cooling the material in the molds, the injection molding machine including a mold opening amount sensor and a controlling unit, wherein,

• the molds include a first mold and a second mold facing each other;
• the injection molding machine further includes:
• a toggle mechanism including a toggle link and a toggle supporting board configured to move the first mold by bending or extension of the toggle link, the toggle link including a first end connected with the first mold and a second end connected with the toggle supporting board, the toggle supporting board supporting the toggle link, and
• a mold thickness adjusting mechanism configured to adjust a distance between the toggle supporting board and the second mold,
• the method comprising:
• detecting, by the mold opening amount sensor, a mold opening amount of the molds;
• and
• controlling, by the controlling unit, the injection molding machine, wherein the controlling unit controls clamping force of the molds and the dwell pressure
• based on the mold opening amount during the molding cycle, wherein the method further comprises:
• updating, by the controlling unit, the clamping force by expansion and contraction of the toggle link in a non-lock-up state;
• and
• adjusting, by the controlling unit, the distance so that, after update of the clamping force is stopped, the clamping force in a lock-up state of the toggle link becomes equal to the clamping force at update stop.