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Vacuum Heat Treatment Furnace

Vacuum Sintering Furnace

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Vacuum Sintering Furnace: A Comprehensive Overview

Vacuum sintering furnace is a furnace that performs protective sintering of heated items in a vacuum environment. It has many heating methods, such as resistance heating, induction heating, microwave heating, etc. Vacuum sintering furnaces generally consist of five major systems: heating system, vacuum system, measurement and control system, cooling system and furnace body. The heating system is a system that provides heating and insulation functions for the vacuum sintering furnace. It consists of external power supply, electrodes, heaters, heating chambers and other heating components and insulation components. The vacuum system is a system that provides a vacuum environment in the furnace and ensures the vacuum requirements in the furnace. It is mainly composed of vacuum valves, vacuum units, connecting conduits, electrical control systems and other vacuum components. The measurement and control system is a system that monitors the temperature, atmosphere and other environments in the furnace and provides feedback, enabling the vacuum sintering furnace to achieve semi-automatic production. The cooling system is a system that provides accelerated cooling for the vacuum sintering furnace, which can greatly improve the efficiency of the vacuum furnace and extend the service life of the furnace. The furnace body is the main body that connects major systems and accommodates the heating chamber to provide a vacuum-sealed environment. Traditional vacuum sintering furnaces suffer from low efficiency and serious losses. The main reason for such problems is that the technical methods used in the design are unreasonable, and preventive and control measures must be taken in the design process.

The cooling systems of sintering furnaces are diverse, and they all use public external cooling water to be directly passed into the furnace wall cooling jacket of the sintering furnace for cooling.
The water cooling system is one of the main cooling methods of the vacuum sintering furnace. It mainly cools the furnace shell, furnace door, electrodes, vacuum pump and other components. Sufficient flow of cooling water must be provided to the above components during operation, otherwise heat accumulation will continue to increase the operating temperature of each component, which will cause each rubber sealing ring to lose its sealing effect due to aging and deformation in a short period of time, affecting the vacuum. Furnace use. At the same time, vacuum furnace users should be informed not to use cooling water with too high hardness. Water with high hardness will decompose and adhere to the pipe wall when it encounters high temperatures when flowing through the cooling components, causing the effective inner diameter of the cooling water pipe to be reduced or even blocked. Cooling water pipe, reduce the flow of cooling water.
In order to avoid the above-mentioned water flow reduction and water cutoff situations when the vacuum furnace is working, try to be as thoughtful as possible when designing. This article considers the water inlet system and the drainage system respectively. In the water inlet system, set up a main water inlet valve, install an electric contact pressure gauge on the main water inlet pipe to monitor the water pressure, and install water volume regulating valves on all diverted pipelines. On the other hand, an open water tank is used in the drainage system. This structure can reduce the drainage pressure of each branch pipeline, thereby ensuring smooth drainage of each branch, and allowing intuitive observation of the water flow in each branch. In addition, on larger cooling components, a desilting device can be installed to facilitate the removal of scale without affecting the vacuum tightness. When production funds are sufficient, inlet flow switches can also be installed on key components such as water-cooled electrodes and heat exchangers to achieve water cutoff alarms and other interlocking controls, so as to monitor the working status of the waterway more intuitively and ensure system stability.

Of course, regular use of special chemical cleaning agents to clean the cooling water system is the most effective way to ensure that the cooling water pipelines are unobstructed.