Custom Oem Aluminum Steel Gravity Die Casting Auto Spare Parts

There are several main methods for removing gas and water during the casting process:
1. Drying of raw materials: Before melting, all raw materials are dried to reduce their moisture content and gas formation.
2. Use of desiccant: In sand casting, an appropriate amount of desiccant, such as quicklime, sawdust, etc., can be added to the molding sand to absorb moisture and prevent it from entering the melt.
3. Reasonably design the pouring system: By designing the pouring system reasonably, the flow speed and direction of the melt during the pouring process can be controlled, which is beneficial for gas discharge and reducing the generation of pores.
4. Vacuum treatment: By using vacuum casting or vacuum treatment technology, gas and water in the melt can be effectively removed, improving the quality of the casting.
5. Refining treatment: During the smelting process, chemical reagents such as refining agents and degassing agents can be used to refine the melt and remove gases and impurities.
In summary, the removal of gases and moisture requires comprehensive consideration from multiple aspects such as raw materials, processes, and equipment, and effective measures are taken to improve product quality.

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