Injection device of die casting machine

Abstract

The invention relates to an injection device of a die casting machine. The injection device comprises a injection cylinder and a pressurizing cylinder, wherein the injection cylinder is internally equipped with a injection piston rod and a injection piston arranged at the end part of the injection piston rod, and the pressurizing cylinder is internally equipped with a pressurizing piston; a rear cavity of the injection cylinder is communicated with a front cavity of the pressurizing cylinder; the injection piston is equipped with an oil guide hole for communicating the oil cavities at the two sides; the injection piston rod is equipped with a cavity, and the cavity is internally equipped with a rod body which can slide along the direction of the injection piston rod and is communicated with an oil circuit control valve; the end part of the rod body is equipped with a piston matched with the oil guide hole; and the rear cavity of the injection cylinder is equipped with a combined valve, and a rear cavity of the pressurizing cylinder is equipped with a standard valve. The injection device has the beneficial effects that oil liquid has less energy loss during the movement process, which maximally reduces the on-way local loss of hydraulic oil and ensures that the hydraulic oil with higher energy is supplied to the injection piston so that the injection piston obtains higher injection power and injection speed.

Description

technical field [0001] The invention relates to the field of die-casting machines, in particular to an injection device for a die-casting machine. Background technique [0002] The injection mechanism of the die-casting machine is the most important part of the die-casting machine, and its performance determines the quality of the die-casting product. In order to ensure the quality of injection molded products, the injection device of the existing die casting machine has slow injection and fast injection functions. The injection device includes an injection cylinder, an injection piston, an injection piston rod and a The piston at the end of the piston rod. The injection structure of die-casting machines on the market now generally has a large pressure loss during the system operation. Some manufacturers adopt the method of reducing the diameter of the injection cylinder in the die-casting process in exchange for a large enough die-casting speed, while the injection power s...

AI Technical Summary

Problems solved by technology

The injection structure of die-casting machines on the market now generally has a large pressure loss during the system operation. Some manufacturers adopt the method of reducing the diameter of the injection cylinder in the die-casting process in exchange for a large enough die-casting speed, while the injection power silver system The energy loss of the injection molding machine is too large to meet the requirements. In order to meet the requirements of injection power and injection speed, some manufacturers continue to increase the structural size of the injection parts, resulting in an increase in the cost of the die-casting machine.

Images