Abstract: A die clamping apparatus includes a fixed die plate for holding a fixed die, a movable die plate for holding a movable die, and structure for actuating the movable die plate to advance or retreat with respect to the fixed die plate. Tie bars for performing a die clamping operation can be fixedly coupled to the fixed die plate after the movable die plate has approached to the fixed die plate and the fixed die and the movable die have closed form a mold. A movable die plate main body and guides for guiding advance/retreat movements and on which the movable die plate is mounted are separately formed and are pin-coupled so as to be mutually rotatable.

Abstract: In a die clamping apparatus including a fixed die plate, a movable die plate, a device for moving the movable die plate relative to the fixed die plate, a device for fixedly coupling the fixed die plate with the movable die plate and tie bars for carrying out clamping of dies, the tie bars are fixedly secured to the fixed die plate and a hydraulic cylinder having a ram is provided on the movable die plate, or vice versa. The coupling device has a half-nut provided on the surface of the fixed die plate so as to be movable in the axial direction of the tie bar insert hole, and are provided on the outer circumference of the tip end of the tie bar and are adapted to mesh with the half-nut. A stopper is provided between the fixed die plate and the half-nut. A part of the ram is made to butt against the stopper to position the ram in the axial direction of the tie bar insert hole. The end surface of the half-nut opposed to the ram is brought into pressing contact with the ram.