When manufacturing aluminum castings, the following points should be noted: Control the casting speed well to avoid generating large shrinkage stress and hot cracks. The castings should conform to the specified dimensions and deviations, and no defects such as cracks, cold shuts, sand holes or gas holes are allowed. The casting temperature should be appropriate to ensure the good fluidity of the molten metal and reduce organizational stress. The non-machined surfaces of the castings should be smooth and flat, and the casting marks should be clear. When designing, it is necessary to rationally layout the structure of the parts, optimize the wall thickness design, keep the cross-sectional thickness uniform, and avoid the occurrence of defects such as shrinkage cavities and sand holes. There are various manufacturing methods for aluminum castings, each with its own characteristics and applicable scenarios. When making a choice, it should be based on specific needs. Meanwhile, attention sh…