1. aluminum alloy casting mould composition of the alloy should meet the requirements of GB/T 15114-1994.
2. the mechanical properties of the casting mold when the sample test, the mechanical properties of GB/T should be consistent with the provisions of 15114-1994 when using casting die body test, the mechanical properties of specimens from the designated parts of cutting shall not be lower than the single cast sample 75%, if there are special requirements, can be agreed by both parties.
3. the size of casting mold: the geometry and size of the casting mold should comply with the provisions of the casting drawings. The dimension tolerance of casting mould should be carried out according to the provisions of GB/T 6414-1999. Special rules and requirements must be marked on the drawings. Refer to table 5 when casting mould visible position tolerance requirements, and the marking method should be according to the provisions of GB/T 15114-1994. The tolerance of casting mold not including casting inclination, the machined surface: inclusive surface to the small end as a benchmark, to be inclusive as big as the benchmark; the surface to be processed: inclusion with big surface to be contained as a benchmark, the small end as a benchmark, there are special provisions and requirements, must be marked on the drawings.
4. casting mold need mechanical processing, the processing allowance according to the provisions of GB/T 15114-1994. If there are special regulations and requirements, the processing allowance must be marked on the drawing.
5. surface quality: casting mold surface roughness should comply with the provisions of GB/T 15114-1994. No cracks, no casting, loose, bubbles and any penetrating defects are not allowed in the casting mould. 3. The casting mould may have defects such as abrasion, dent, lack of meat and mesh burr. However, the extent and quantity of the defects should be consistent with the standards agreed by both suppliers and buyers. 4. The gate, edge, overflow, skin and marks of the top of the casting mold should be cleaned up. But allowed to leave traces. If the pattern of no special provisions, the relevant part of the casting process, such as rod position, parting line, gate position and overflow position self imposed by the manufacturer, otherwise the pattern should be indicated or agreed by both parties.
