Sand casting and wax loss investment casting are the two most common processes in casting production, with completely different costs, precision, and applicable batch sizes.
Sand casting uses molding sand for shaping, with the lowest cost, suitable for large and small batch production of individual pieces. This process is used for brass sand castings, gray iron sand castings, and aluminum sand castings. The disadvantage is that the surface is rough, the accuracy is average, and a large amount of machining is required.
The wax mold used for lost wax investment casting is formed and then dewaxed and poured, with an accuracy of CT4-CT6 level and a smooth surface. This process is used for stainless steel investment casting impellers, brass wax lost investment casting, and copper wax lost investment casting. Suitable for small and medium-sized components with complex shapes and high precision requirements. The disadvantage is that the process is long and the cost is high.
Simple and low-cost sand mold selection for large items; Complex small parts, high-precision selection of lost wax. Small batch, high precision use lost wax, large batch, simple shape use sand mold.
