Stop valve suitable for mold temperature machine

Abstract

The invention relates to a stop valve suitable for a mold temperature machine. The stop valve comprises a valve body, an inlet passage and an outlet passage, wherein the inlet passage and the outlet passage are formed in the valve body. The valve body further comprises a transition cavity, and the outlet passage directly communicates with the transition cavity. A switching-off valve is arranged between the inlet passage and the transition cavity. The outlet position of the outlet passage is provided with a non-return valve and a back pressure spring connected with the non-return valve, and theswitching-on pressure of the non-return valve is adjusted through the back pressure spring. In this way, the specific action of the switching-off valve arranged in the stop valve is controlled by commands sent out by a mold machine, and the commands determine whether a high-temperature heating medium or a low-temperature cooling medium can flow into the transition cavity or not through a valve body inlet. When the pressure in the transition cavity is larger than the sum of the external pressure and pressure of the back pressure spring, the non-return valve can be switched on, the external pressure basically maintains unchanged, therefore the outlet pressure is basically determined by the back pressure spring, and thus the stability of the outlet pressure is guaranteed.

Description

technical field [0001] The invention relates to the technical field of valve body manufacturing, in particular to a shut-off valve adapted to a mold temperature controller. Background technique [0002] At present, in the process of injection molding products, it is necessary to control the temperature of the injection mold in real time according to the operating process, and in order to obtain better molding effects and higher production efficiency, rapid heating or rapid cooling is required. The shut-off valve is used to achieve this purpose, and is used to control the on and off of the high-temperature heating medium and the low-temperature cooling medium. , the existing stop valves on the market generally have problems such as unstable output pressure, poor sealing at high and low temperatures, and short service life, which seriously limits the development of injection mold temperature control technology, and this problem needs to be solved urgently. Contents of the in...

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Problems solved by technology

[0002] At present, in the process of injection molding products, it is necessary to control the temperature of the injection mold in real time according to the operating process, and in order to obtain better molding effects and higher production efficiency, rapid heating or rapid cooling is required. The shut-off valve is used to achieve this purpose, and is used to control the on and of

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