Die casting device of horizontal type cold chamber vacuum die casting machine and method for utilizing die casting device for die casting

Abstract

The invention discloses a die casting device of a horizontal type cold chamber vacuum die casting machine. The die casting device comprises a press chamber, a die casting die, a vacuum valve, a puncher pin, an ejection rod, a first stop valve, a compressed air storage tank, a second stop valve, a vacuum system, a control device and a displacement sensor. The die casting die comprises a fixed die body and a movable die body, and the fixed die body and the movable die body are matched to form a cavity, an inner sprue, an exhaust channel and a valve cavity. The vacuum valve is arranged at the position, in the fixed die body, of the valve cavity and connected with the first stop valve through a valve connecting pipe. The first stop valve is connected with the compressed air storage tank. A sprue gate is arranged on the press chamber. The control device is used for controlling running of the compressed air storage tank and the vacuum system and opening and closing of the first stop valve and the second stop valve. The die casting device has the advantages of being good in vacuum effect, easy and convenient to arrange and maintain, low in fault rate and long in service life.

Description

technical field [0001] The invention belongs to the field of die-casting machines, and more specifically relates to a die-casting device of a horizontal cold-chamber vacuum die-casting machine and a die-casting method using the die-casting device. Background technique [0002] Vacuum die-casting technology is a casting forming method that uses a vacuum source to discharge the gas inside the mold cavity, and then fills the mold cavity with molten metal in this vacuum state. Vacuum die-casting inherits the advantages of ordinary die-casting methods, but it can greatly reduce the internal porosity defects of castings, and has a significant effect on improving the quality of castings, so it has been widely used. [0003] Existing vacuum die-casting generally extracts the gas in the cavity through a vacuum valve installed on the mold. This method has some disadvantages during use: 1) Due to the exhaust cross-sectional area of ​​the vacuum valve and the cross-sectional area of ​​t...

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Problems solved by technology

[0003] Existing vacuum die-casting generally extracts the gas in the cavity through a vacuum valve installed on the mold. This method has some disadvantages during use: 1) Due to the exhaust cross-sectional area of ​​the vacuum valve and the cross-sectional area of ​​the overflow slot It is difficult to quickly discharge a large amount of high-temperature fumes generated during pouring in the pressure chamber far away from the vacuum valve, because they need to flow along the runner, ingate, cavity, overflow groove, overflow groove, suction channel and vacuum The valve can only be discharged out of the cavity after waiting, the path is long and time-consuming

2) The high-temperature flue gas is discharged through the vacuum system, which will cause the temperature of some key components of the vacuum system such as valves and vacuum pumps to be too high, which will affect the normal operation of these components, increase the failure rate of parts, and reduce the reliability

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