Die clamping device for injection molding machine

Abstract

Breakage of the actuator moving the movable platen in the clamping device of an injection moulder is prevented. The clamping device includes a movable platen shifting device increasing and decreasing a horizontal distance between the movable platen (3) and the fixed platen (2). It includes an actuator (41), a clevis pin connecting the actuator (41) and the movable platen (3), a clevis pin holding part holding a central axis of the clevis pin perpendicular to a moving direction of the movable platen (3), and a clevis pin connecting part that connects the actuator (41) and the clevis in. The clevis pin connecting part is a supporting structure rotating with the clevis pin. The clevis pin connecting part is supported by the movable platen (3). The clevis pin, the clevis pin connecting part, and the front end of the actuator are aligned in a straight line.

Description

technical field [0001] The invention relates to a mold plate opening and closing device of an injection molding machine, in particular to a connecting mechanism between a working end of an actuator that drives a movable mold plate forward and backward and the movable mold plate. [0002] This application claims priority based on Japanese Patent Application No. 2011-007135 for which it applied in Japan on January 17, 2011, and uses the content here. Background technique [0003] Currently, as described in Patent Document 1 and Patent Document 2, in the mold plate opening and closing mechanism of an injection molding machine, hydraulic or electric actuators are directly fixed to the movable mold plate and the fixed mold plate. or, as in Figure 16 , Figure 17 As shown, the connection between the movable die plate and the actuator consists of the pressing member 61 installed on the movable die plate 3 and the working rod 42 of the actuator 41 provided with the groove portion ...

AI Technical Summary

Problems solved by technology

[0006] When the inclination of the movable mold table 3 caused by the wear of the side guide plate 13 and the deformation of the fixed mold table 2 and the movable mold table 3 caused by the increase of the mold clamping force occur, even if the movable mold table moving mechanism 40 and The connecting mechanism of the supporting member 60 fixedly installed on the movable mold plate 3 uses the pressing member 61 and the front end 45 of the working rod 42 of the actuator 41, and only passing through the gaps S1 and S2 between the pressing member 61 and the front end 45 is also sufficient. Cannot completely absorb the wear of the side guide plate 13 of the movable die plate 3, the inclination of the movable die plate 3 and the deformation of the fixed die plate 2 and the movable die plate 3

As a result, the working rod 42 of the actuator 41 is deformed at the connecting portion ( Figure 18 As shown in X2), it will cause damage as it is repeatedly bent

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