Supplementary volume equal volume displacement internal circulation mold clamping device

Abstract

The invention relates to the technical field of mold closing devices and provides a supplementary positive-displacement-type isometric displacement internal-circulation mold clamping device with wide using adaptability. The supplementary positive-displacement-type isometric displacement internal-circulation mold clamping device is composed of a movable mold plate, a fixed mold plate, a mold locking oil cylinders and supplementary oil cylinders, wherein each mold clamping oil cylinder comprises a cylinder body, a piston, a piston rod and a switching valve, each supplementary oil cylinder comprises a supplementary cylinder body, a supplementary piston, a supplementary piston rod and a stop valve, each piston separates each cylinder body into a rod cavity and a rodless cavity, each supplementary piston separates each supplementary cylinder body into a supplementary oil cavity and an air cavity, the supplementary oil cavities are connected with the rod cavities, and the stop valves are arranged at the connecting parts of the supplementary oil cavities and the rod cavities. The supplementary positive-displacement-type isometric displacement internal-circulation mold clamping device can achieve 'real isometric displacement internal circulation', that is, hydraulic oil is not required to be drained back to an oil tank during mold closing and oil suction from the oil tank is not required during mold opening, and the supplementary positive-displacement-type isometric displacement internal-circulation mold clamping device has the advantages of low energy consumption, short pressure rising time, good energy-saving and high-efficiency effect, same mold locking oil cylinder structure, simultaneity in action, high mold opening, closing and locking performances and high precision, uniform stress, stability and reliability in use, and being suitable for injection molding machines with various specifications and models.

Description

technical field [0001] The invention relates to the technical field of mold clamping devices, in particular to a two-platen direct pressure internal circulation mold clamping device with constant volume replacement. Background technique [0002] The internal circulation two-platen direct pressure mold clamping device has the advantages of excellent mold clamping performance, high efficiency and energy saving. The existing internal circulation two-platen direct pressure mold clamping technology usually uses four large mold clamping cylinders installed at the four corners of the fixed platen to complete the mold clamping. The fixed template moves, and at the same time the piston of the clamping cylinder follows, and the hydraulic oil in the clamping cylinder "circulates" from the rodless cavity on one side of the piston to the rod cavity on the other side through the opened piston valve core; At this time, the piston valve core of the clamping cylinder is closed, and because ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of long structural size, uneven force, and limited structural size ratio of the existing mold clamping device, the purpose of the present invention is to provide a simple and reasonable structure, high strength and rigidity, uniform force, stable and reliable use, and a wide range of advantages. An Adaptive Isovolume Displacement Internal Circulation Clamping Device

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