Injection molding machine capable of reducing the work required to an operator

An injection molding machine for carrying out an injection molding cycle including a filling process and a holding process and which comprises a mold composed of a fixed mold attached to a fixed platen and a movable mold attached to a movable platen, and a driving source for driving said movable platen to open and close said mold, said injection molding machine further comprising:

• means for injecting resin into the mold when in a mold closed position;
• a distance sensor for detecting, as a platen interval, a distance between two positions preliminarily selected on said fixed platen and said movable platen during said mold closed position to produce a distance detection signal representative of said platen interval;
• a pressure sensor for detecting a clamping pressure applied by said driving source to produce a pressure detection signal representative of said clamping pressure;
• a setting unit for entering a preselected platen interval and a preselected clamping pressure, said preselected platen interval and said preselected clamping pressure being preselected values;
• and
• a control unit responsive to said preselected values, said distance detection signal, and said pressure detection signal for controlling said driving source to adjust said platen interval and said clamping pressure to maintain said platen interval.