V-Process Special Sand Box

Adopts double corrugated steel and welds after bend, the drawing baseboard, positioning pin hole and joint surface of upper and lower sand box are made by machining. Smoke ventilator adopts 20x250 stainless steel wire net mat network, and use punched steel to protect stainless steel screen from collision and damage of casting or hard object. Sand box is equipped with two one-way valve, etc.