Wet sand casting is a casting method that uses molding sand and core sand as molding materials, producing castings by filling molds with molten metal under gravity. It is suitable for steel, iron, and most non-ferrous alloy castings. Castings produced using this method account for over 70% of total castings. It features low molding material costs and recyclable sand molds, and is widely used in the production of automotive parts (such as pump housings, valve bodies, and flywheels).
Sand molds typically consist of an outer sand mold and a core. Siliceous sand and clay are commonly used raw materials. Wet sand casting employs either vertical or horizontal parting processes. The former is suitable for mass production of gray iron/ductile iron parts, while the latter is suitable for small to medium batches of complex castings requiring rapid mold changes.
Waste sand recycling uses a combination of low-temperature thermal methods, mechanical methods, and chemical regeneration processes. It utilizes a secondary roasting principle to burn residual carbon substances to improve the quality of the recycled sand.
