2026-06-11Views：
Conclusion: The screw air compressor is the power heart of the foundry, and almost all the links that need pneumatic are inseparable from it.
Let's start with what it does in the foundry.
The first is sand cleaning. After the casting comes out of the mold, the surface will stick to sand, which needs to be blown clean with compressed air. The gas consumption in this link is the largest, and the gas is required to be clean, and there is no oil stain to dirty the surface of the casting.
The second is a pneumatic tool. The pneumatic picks, spanners and pneumatic grinders in the foundry are all driven by compressed air. The air output of the screw machine is stable, unlike the piston machine, the tools are easy to use and the work efficiency is high.
The third is pneumatic control. Many of the valve switches in molding machines, box-closing machines, and gating systems are controlled by compressed air. As soon as the gas volume fluctuates, the control is not allowed and the quality of the casting is out of question. Screw machine because it is a continuous operation, gas output is very stable, especially suitable for this need precise control of the occasion.
The fourth is nitrogen production and protective atmosphere. Aluminum alloy smelting when the need for nitrogen as a protective gas, to prevent the oxidation of aluminum liquid. The raw material of the nitrogen making machine is compressed air, so the air volume of the air compressor directly determines how much nitrogen you can produce.
Besides the advantages of water lubricated screw air compressor in the foundry. When the traditional oil injection screw machine works, the oil will mix into the gas. Although the oil and gas separator can stop most of it, there is always a trace of oil running out. These oils fall on the surface of the casting, and problems will occur during subsequent spraying or processing, such as poor adhesion of the paint surface and pores in welding. Water-lubricated screw air compressor works with water instead of oil to participate in compression, water in the inside to play the role of sealing and cooling, the gas discharged completely oil-free. The surface of the casting is clean, and the process behind it is a lot of worry. Moreover, the cooling effect of water is better than that of oil, and the exhaust temperature of the machine is low. In the high temperature environment of the foundry, the overall stability of the water-lubricated screw machine is better, and it is not easy to shut down due to overheating.
After the water is treated by the gas-water separator, the water quality is relatively clean, does not contain oil, and the environmental protection pressure is small. Cooperate with the dryer to remove the moisture, and what comes out is dry and oil-free compressed air, sand blowing does not leave water stains, pneumatic tools do not rust, and control valves do not catch.
Simply put, the screw air compressor provides all the places where gas is needed for the foundry. The water-lubricated screw machine has no oil and the gas discharged is cleaner, which is especially suitable for scenes that require the surface quality of castings.
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