1. Cold insulation, cracks, shrinkage holes, penetration defects and serious defects (such as undercasting, mechanical damage, etc.) are not allowed on the surface of the casting.
2. Castings should be clean and free of burrs and flash. The pouring riser on non-machining marks should be cleaned and flush with the surface of the casting.
3. The casting text and logo on the non-machined surface of the casting should be clearly legible, and the position and font should comply with the drawing requirements.
4. The non-machined surface roughness R of sand castings shall not be greater than 50 μm.
5. Castings should be cleaned of pouring risers, burrs, etc., and the remaining pouring risers on the unprocessed surface should be leveled and polished to meet surface quality requirements.
6. The molding sand, core sand and core bone on the casting should be cleaned.
7. The casting has an inclined part, and the dimensional tolerance zone should be arranged symmetrically along the inclined plane.
8. The molding sand, core sand, core bone, flesh, sticky sand, etc. on the casting should be cleaned.
9. Correct and incorrect types, boss casting deviations, etc. should be corrected to achieve a smooth transition and ensure appearance quality.
10. The depth of wrinkles on the non-machined surface of castings should be less than 2mm and the spacing should be greater than 100mm.
11. The non-machined surfaces of machine product castings need to be shot blasted or roller treated to meet the requirements of cleanliness level Sa2 1/2.
12. Castings must be water toughened.
13. The surface of the casting should be smooth, and gates, burrs, sticky sand, etc. should be removed.
14. Castings are not allowed to have cold insulation, cracks, holes and other casting defects that impair use.
