High-pressure die-casting machine gastight type vacuum system and vacuum pipeline gas tightness detection method

Abstract

The invention provides a high-pressure die-casting machine gastight type vacuum system and a vacuum pipeline gas tightness detection method. The system comprises a die-casting die, a vacuum tank, a die vacuum valve, a vacuum pipeline control valve, a gastight pressure detection device, a gas blowing device and a controller. The die-casting die and the vacuum tank are arranged in a matched manner.The die-casting die is connected with the vacuum tank through a pipeline. The connection pipeline between the die-casting die and the vacuum tank is written as a vacuum pipeline. The die vacuum valveis arranged on the pipe section, adjacent to the die-casting die, of the vacuum pipeline. The vacuum pipeline control valve is arranged on the pipe section, adjacent to the vacuum tank, of the vacuumpipeline. The gastight pressure detection device is connected with the vacuum pipeline through a pipeline. A gastight control valve is arranged on the connection pipeline of the gastight pressure detection device and the vacuum pipeline. The gas blowing device is connected with the vacuum pipeline through a pipeline. A gas reverse blowing control valve is arranged on the connection pipeline of thegas blowing device and the vacuum pipeline. By means of the technical scheme of the high-pressure die-casting machine gastight type vacuum system and the vacuum pipeline gas tightness detection method, the problem that molten aluminum enters a die cavity pipeline and the vacuum pipeline is effectively solved, the device production continuity is effectively improved, and meanwhile device safety and operating personnel safety are also ensured.

Description

technical field [0001] The invention relates to the technical field of safe production, in particular to an airtight vacuum system of a high-pressure die-casting machine and a method for detecting air-tightness of a vacuum pipeline of a high-pressure die-casting machine. Background technique [0002] With the development of the die-casting industry, vacuum equipment is adopted by more and more die-casting manufacturers. Before the injection process starts, the vacuum system uses a vacuum pump to discharge the air in the vacuum tank to keep the vacuum tank at a higher vacuum level. , generally set at around 20mbar. Vacuum system At the moment of die-casting by the die-casting machine, the control system turns on the switch of the vacuum tank and the cavity to quickly realize the vacuum of the cavity. However, there are the following technical flaws: [0003] During the injection process of the die-casting machine, the pressure of the aluminum liquid in the mold cavity is hi...

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Problems solved by technology

[0003] During the injection process of the die-casting machine, the pressure of the aluminum liquid in the mold cavity is high and the flow speed is fast, which is easy to produce a thin aluminum skin, and the aluminum skin is likely to cause the vacuum valve to not move properly during the vacuum valve blowback and opening process, resulting in During the die-casting process, molten aluminum enters the vacuum pipeline, which may easily cause damage to the pipeline, blockage of the mold vacuum pipeline, etc., seriously affecting production efficiency

Moreover, since the molten aluminum temperature is about 700°C during the die-casting process, the molten aluminum enters the vacuum pipeline, which seriously affects the safety of equipment and workers, and there are certain safety risks

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