One-way valve injection device for die casting machine

Abstract

The invention relates to a one-way valve injection device for a die casting machine, which comprises an injection cylinder, an injection piston, a pressurizing piston and a pressurizing valve plate, wherein the injection piston, the pressurizing piston and the pressurizing valve plate are arranged in the injection cylinder; the pressurizing valve plate is provided with a first valve hole and a second valve hole, the pressurizing piston is arranged in the first valve hole and is matched with the first valve hole in a dynamic sealing manner, the injection cylinder is connected with the first valve hole of the pressurizing valve plate in a sealing manner, a one-way valve is arranged between the injection piston and the pressurizing piston, one end of the one-way valve is arranged in the injection cylinder and is matched with the injection cylinder in a dynamic sealing manner, the other end of the one-way valve is fixedly connected with the pressurizing piston, and the second valve hole is communicated with an oil inlet of the one-way valve. Compared with a floating piston, the one-way valve injection device operates stably and reliably; the problem of instable speed when advanced pressurizing and stroke control pressurizing under a pressure control condition can be solved; and stroke or time control can be realized and pressing time is shortened through pressurization, thus the one-way valve injection device can adapt to the requirement for the traditional high-end die casting within larger range.

Description

technical field [0001] The invention relates to the technical field of die-casting machine components, in particular to a one-way valve injection device for a die-casting machine. Background technique [0002] The die-casting machine is a series of industrial casting machines that hydraulically inject molten metal into the mold under pressure to cool and form it, and obtain solid metal castings after the mold is opened. It was originally used for die-casting characters. With the advancement of science and technology and industrial production, especially with the development of industries such as automobiles, motorcycles and household appliances, and starting from energy saving and saving raw materials, die-casting technology has achieved extremely rapid development. The core component in the die casting machine is the injection device, such as image 3 As shown, the existing injection device includes injection piston 1, floating piston 2, booster piston rod 3 and booster pis...

AI Technical Summary

Problems solved by technology

[0003] The injection device of the floating piston 2 used in the existing die-casting machine has complex structure, difficult manufacture, complicated installation and maintenance, resulting in high manufacturing cost and use cost. requirements, need an alternative product, reduce costs and improve operational stability

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