Press-shoot pressurization system and die-casting machine

Abstract

The invention discloses a press-shoot pressurization system and also discloses a die-casting machine provided with the press-shoot pressurization system. The press-shoot pressurization system comprises a cylinder block, a press-shoot piston, a pressurization piston and a press-shoot switch, wherein a guiding hole is formed in the cylinder block; one end of the press-shoot piston is arranged in thecylinder block; a press-shoot cavity is formed between one end of the press-shoot piston and the pressurization piston in the cylinder block; a pressurization cavity is formed between the pressurization piston and the cylinder block; oil enters the press-shoot cavity and the pressurization cavity through a first oil inlet and a second oil inlet separately; the press-shoot switch is arranged on the inner side wall of the guiding hole and the pressurization piston, and the two ends of the press-shoot switch communicate with the press-shoot cavity and the first oil inlet separately; the pressurization piston slides in the guiding hole to turn off the press-shoot switch; and the press-shoot cavity forms a hermetic high-pressure resistant cavity to continuously push the pressurization piston,the press-shoot cavity raises to the set high pressure value immediately, and the process can shorten the pressure building time and improve the pressure building stability. The die-casting machine provided with the press-shoot pressurization system can improve the pressure casting effect and the product quality.

Description

technical field [0001] The invention relates to the technical field of die-casting machines, in particular to an injection booster system and a die-casting machine with the same. Background technique [0002] At present, the injection system of most die-casting machines includes an injection piston and a booster piston. There is an injection chamber between the two. Rapid injection is achieved by injecting high-pressure oil into the injection chamber. When boosting is required, the booster piston The injection chamber is pressurized by movement, and the injection chamber needs to be under high pressure (about 40MPa). The oil inlet channel during rapid injection is closed through the check valve, so that the injection chamber is sealed. The one-way valve generally has a spring, and it takes a certain amount of time for the one-way valve to close the valve core through hydraulic pressure and spring force, so the pressure build-up time of the injection chamber is long (more tha...

AI Technical Summary

Problems solved by technology

The one-way valve generally has a spring, and it takes a certain amount of time for the one-way valve to close the valve core through hydraulic pressure and spring force, so the pressure build-up time of the injection chamber is long (more than 25ms); the pressure difference of the liquid flow closes the one-way valve core during the process , the hydraulic oil has a certain impact and instability, and the spring also has a fatigue strength, so there is uncertainty in the closing time of the check valve, which directly affects the stability of the injection system pressure build-up, thereby affecting product quality

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