Patent ID: 7287972

Claim:
A mold clamping apparatus comprising: a fixed die plate fixed on a base and holding one of a pair of dies; a movable die plate holding the other of the pair of the dies and provided in the opening or closing direction on the base movably; a plurality of tie bars having pistons and coupled sections and dividing mold clamping force given to the dies between the pistons and the coupled sections; a plurality of cylinders for mold clamping equipped in one of the fixed die plate or the movable die plate, accommodating the pistons of a plurality of the tie bars respectively, and to which pressured operating fluid for generating the mold clamping force is supplied; a plurality of uniting units being equipped in another of the fixed die plate or the movable die plate and uniting releasably with a plurality of the tie bars respectively by meshing with coupled sections of a plurality of the tie bars respectively; a tie bar load distribution unit for deciding a distribution of loads divided by a plurality of the tie bars based on information concerning the dies, and a control unit for controlling pressure of the operating fluid of a plurality of the cylinders for mold clamping independently to become the loads of the decided distribution.