Die-assembling mechanism of injection molding machine with double lead screw drive by rhombic connecting rods

Abstract

The invention discloses a die-assembling mechanism of an injection molding machine with double lead screw drive by rhombic connecting rods. Four pull rods sequentially pass through pull rod holes of a rear template, a movable template and a front template, one end of each of the four pull rods is fixedly connected with the front template while the other end of each of the four pull rods is fixedly connected with the rear template, the front template is fixed on a frame of the injection molding machine, one ends of first and second left connecting rods are respectively hinged with the rear template, one ends of first and second right connecting rods are respectively hinged with the movable template, a servo motor is supported in a horizontal groove in the centre of a short guide rail of the frame of the injection molding machine and is connected with a double lead screw through a coupler, and rhombic connecting rod mechanisms are formed at both ends of the double lead screw. The end faces of the rear and movable templates are installed on a long guide rail of the frame of the injection molding machine through roller units, respectively. The rhombic connecting rod mechanisms drive the movable template to reciprocate, so that the mechanism has the characteristics of short period of motion, stability of mould clamping force and small deformation of the movable template. The mechanism disclosed by the invention is suitable for die-assembling mechanisms of small and medium-sized injection molding machines for precise mould injection.

Description

Technical field [0001] The invention relates to an injection molding machine, in particular to a mold clamping mechanism of an injection molding machine driven by a diamond-shaped connecting rod and two-wire screw. Background technique [0002] At present, the mainstream injection molding machine opening and closing mechanism in the market is still the traditional five-point oblique row double toggle mold clamping mechanism. This mechanism is driven by a hydraulic cylinder piston to push the crosshead or a servo motor driven screw to push the crosshead, which is connected by a crosshead connecting rod. The toggle mechanism drives the moving template to reciprocate to realize the mold opening and closing actions and provide the corresponding clamping force; however, the traditional mold clamping mechanism has many defects. First, the toggle mechanism has many parts and the toggle movement is relatively complicated. , Toggle movement in the extreme position is easy to lock or the m...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of the traditional toggle mold clamping mechanism that the template is unbalanced in force, the template is deformed, the friction is large, the energy consumption is high, the wear is heavy, and the parallelism of the template is low, the purpose of the present invention is to provide a diamond-shaped connecting rod double-wire wire The mold clamping mechanism of the injection molding machine driven by the rod adopts the servo motor to drive the double-wire screw. Through the double-wire screw and the nut, the rotational motion is converted into the relative motion of the two nuts, which drives the diamond-shaped linkage mechanism to realize mold opening, Clamping movement and achieving clamping force maintenance

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