Abstract: A die clamping system enabling reduction of the size of a tie bar withdrawing mechanism, that is, a die clamping system provided with a fixed die plate, a moveable die plate, tie bars withdrawable from the fixed die plate, moveable parts engaging with the tie bars, withdrawal cylinders moving the moveable parts provided in the moveable die plate in a withdrawing direction, and a hook system engaging the moveable parts and the tie bars. When a second coupled part and a second coupling part are coupled, a drive mechanism moves said moveable die plate to a die opening direction and afterwards releases the coupling of the second coupled part and the second coupling part. When a coupling is formed by the hook system, the withdrawal cylinders move the moveable parts to a withdrawing direction.

Abstract: To provide a mold clamping apparatus able to suppress spout of a molding material from between mating faces of dies and to extend the lifetime of the dies. A mold clamping apparatus has a control apparatus deciding a distribution of a load divided by a plurality of tie bars based on information concerning to the die and controlling pressure of driving oil of a cylinder chamber of each cylinder for mold clamping independently to become a load having a determined distribution.

Abstract: A die opening and closing system includes a fixed die plate holding a fixed die, a moveable die plate holding a moveable die able to move in a horizontal die opening and closing direction with respect to said fixed die plate, only one ball-screw feed mechanism moving said moveable die plate in a die opening and closing direction, and only one balance cylinder system reducing a load of said ball-screw feed mechanism and a die opening and closing method related to the same.

Abstract: A die clamping system enabling reduction of the size of a tie bar withdrawing mechanism, that is, a die clamping system provided with a fixed die plate, a moveable die plate, tie bars withdrawable from the fixed die plate, moveable parts engaging with the tie bars, withdrawal cylinders moving the moveable parts provided in the moveable die plate in a withdrawing direction, and a hook system engaging the moveable parts and the tie bars. When a second coupled part and a second coupling part are coupled, a drive mechanism moves said moveable die plate to a die opening direction and afterwards releases the coupling of the second coupled part and the second coupling part. When a coupling is formed by the hook system, the withdrawal cylinders move the moveable parts to a withdrawing direction.

Abstract: A clamping system provided with a fixed die plate, a movable die plate, a plurality of tie bars, half nuts able to be coupled with or release coupled parts of a plurality of tie bars, clamping cylinders accommodating pistons of a plurality of tie bars, position sensors detecting positions of pistons, a plurality of direction control valves connected to a plurality of clamping cylinders, and a control unit controlling the plurality of direction control valves so that a difference of movement amounts of pistons among the plurality of tie bars from the time of die contact to the time of the completion of clamping becomes within a predetermined permissible value based on detection results of the position sensors.

Abstract: A clamping apparatus having a simple configuration and capable of opening and closing dies and clamping the dies, which includes a base frame; a fixed die plate; a movable die plate; a rack fixed with respect to the base frame and extending in a die opening and closing direction; a pinion pivotally supported by the movable die plate and meshing with the rack; a motor provided in the movable die plate, driving and rotating the pinion, and moving the movable die plate toward the die opening and closing direction; a tie bar having a jointed portion; a joint portion provided on the movable die plate and capable of engaging and disengaging the jointed portion of the tie bar; and a clamping cylinder provided on the fixed die plate and imparting tension to the tie bar with the joint portion and the jointed portion jointed to generate clamping force.

Abstract: To provide a mold clamping apparatus able to suppress spout of a molding material from between mating faces of dies and to extend the lifetime of the dies. A mold clamping apparatus has a control apparatus deciding a distribution of a load divided by a plurality of tie bars based on information concerning to the die and controlling pressure of driving oil of a cylinder chamber of each cylinder for mold clamping independently to become a load having a determined distribution.