Die casting mold vacuum valve

Abstract

The invention provides a vacuum valve of a die-casting die. The vacuum valve of the die-casting die comprises a movable die valve body and a fixed die valve body arranged on a movable die frame and a fixed die frame correspondingly. An exhaust channel is formed between the movable die valve body and the fixed die valve body. The fixed die valve body is provided with a first valve hole and a second valve hole communicating with the exhaust channel. The first valve hole and the second valve hole are internally provided with a first valve element and a second valve element correspondingly. The fixed die valve body is provided with a communicating opening enabling the exhaust channel to communicate with the outside. The vacuum valve of the die-casting die further comprises a transmission piece connected between the first valve element and the second valve element in a transmission manner and an elastic assembly conducting elastic pushing on the first valve element and the second valve element. When die-casting liquid flows to the first valve hole along the exhaust channel, the first valve element drives the second valve element through the transmission piece to conduct plugging between the exhaust channel and the communicating opening due to the pressure of the die-casting liquid. The vacuum valve of the die-casting die can vacuumize the inner portion of the die-casting die cavity when the die-casting liquid is poured and can plug an external vacuumizing device when the die-casting die cavity is full. The vacuum valve of the die-casting die has a good use effect.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a vacuum valve for a die-casting mold. Background technique [0002] During the die-casting process of aluminum alloy parts, the air inside the mold cavity and the residual moisture of the release agent will lead to poor die-casting filling, or the die-casting parts will have pores after processing, which will lead to the air-tightness of the die-casting products not meeting the standard and leakage issues. In order to avoid air holes in die-casting products, the method of increasing exhaust at the end of mold filling is usually adopted. The more commonly used exhaust method is the natural exhaust method, and the use of an exhaust plate with a vacuum device to rely on the gap between the exhaust blocks for exhaust. [0003] In the way of installing a vacuum exhaust plate at the end of the mold cavity filling, the exhaust channel is usually designed with a wave section, and the mi...

AI Technical Summary

Problems solved by technology

Another solution is to increase the gap value to increase the cross-sectional area of ​​the channel, but at this time the alloy liquid will fill the entire exhaust plate and block the vacuum channel, so neither of these two solutions can achieve a good exhaust effect

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