The factory adopts the hyperbolic elbow inversion type, as shown in Figure 9. The principle of this type of action is: when opening and closing the mold, the closing cylinder 1 feeds oil, and the piston rod drives the hyperbolic toggle connecting rod mechanism 5 drives the mold 6 and its mold to realize the opening and closing mold movement;

The elbow connecting rod 5 is not straightened, under the action of the thrust of the cylinder 1, the magnifying effect of the force generated by the elbow connecting rod mechanism 5 of the Japanese injection molding machine brand deforms the clamping system until the elbow connecting rod 5 is straightened and enters the self-locking state. The mold adjusting device is matched with the closing cylinder and adjusted according to the locking force required by the process to make the connecting rod not straight.

The characteristics of the direct pressing mold structure are that the switching mold action and locking mold action are completed by the direct action of the cylinder. The moving speed and elastic modulus are determined by the moving speed of the piston rod and the maximum axial force generated by the piston.

The working principle is: when changing the mold, moving the cylinder 5 into the oil, promote the piston rod, thereby driving the rod and moving the mold movement, to achieve the switch mold movement; After entering the locked state, the oil cylinder 4 is locked, the oil cylinder 4 is fed, and the piston rod is pushed to realize the locking mold.