Die locking mechanism and method for two-plate injection molding machine to bear spiral pairs to synchronously follow movable template

Abstract

The invention discloses a die locking mechanism and method for a two-plate injection molding machine to bear spiral pairs to synchronously follow a movable template. In the mechanism, the movable template and a fixed template are connected through pull rods, the ends, located on the outer side of the movable template, of the pull rods are provided with die locking bearing nuts, the other ends of the pull rods are provided with die locking oil cylinders, and a first rolling spiral pair is formed by each pull rod and the corresponding die locking bearing nut. Supporting bases are arranged on theouter side of the movable template and provided with second rolling spiral pairs. A following synchronous belt wheel assembly is arranged between each second rolling spiral pair and the correspondingfirst rolling spiral pair. According to the method, die moving oil cylinders drive the movable template to conduct the die opening or closing action, the movable template drives the second spiral rolling spiral pairs to act, and the second rolling spiral pairs drive the first rolling spiral pairs to synchronously run through the following synchronous belt wheel assemblies. According to the die locking mechanism, usage of a gate plate and a hooping nut can be omitted, a special die adjusting device does not need to be arranged, and the die locking mechanism can adapt to different die thicknesses and is flexible in usage.

Description

technical field [0001] The invention relates to the field of mold clamping equipment for injection molding machines, in particular to a mold clamping mechanism and method for a two-platen injection molding machine carrying a screw pair and synchronously following a moving template. Background technique [0002] The mold clamping device of the traditional injection molding machine is a three-plate type, which consists of a head plate, a second plate and a tail plate. Generally, the head plate is a fixed plate, and the second plate is connected to the tail plate through a tie rod. The clamping oil rainbow installed on the tail plate drives the second plate. Perform mold opening and closing actions. After the mold is closed in place, a large clamping force is generated through the force amplification of the toggle. This structure leads to a relatively fixed clamping stroke. When the tonnage is large, the weight of the clamping system quite big. Compared with the traditional th...

AI Technical Summary

Problems solved by technology

Its mold shifting and mold locking are separated. The mold shifting uses a small oil cylinder, which moves fast but with a small force. After moving to the right position, the mold closing uses a mold locking cylinder with a small stroke. When closing the mold, it uses the lock brake Lock or the nut clamps the tie rod, and then applies the clamping force through the clamping cylinder to close the mold, but this method has poor stability and is troublesome to adjust the mold

[0005] The mold clamping mechanism of the outer circulation is to fix the mold clamping cylinder on the moving platen. When the mold is moved, the mold clamping cylinder moves along with it. Injection molding machine axial distance increased

In addition, the oil exchange inside adopts external circulation, and the unused oil is discharged to the oil tank when the mold is moved, and the other end also absorbs oil from the oil tank, which increases the pipeline loss and energy consumption value

[0006] The mold clamping mechanism of the internal circulation is controlled by a valve in the piston of the clamping device, which separates the cylinder into a high-pressure chamber and a storage chamber. The oil can be circulated and exchanged when the mold is moved, but the internal circulation increases the oil cylinder. length, and requires high precision, the equipment manufacturing cost is high, and the equipment maintenance is difficult

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