[China Aluminum Network] 1) Chemical composition The chemical composition of the alloy should meet the requirements of GB/T15114-1994.
2) Mechanical properties 1 When using the casting mold test, the mechanical properties shall comply with the provisions of GB/T15114-1994. 2 When using the casting mold body inspection, the mechanical properties of the sample cut at the designated site shall not be lower than the single casting sample. The 75%, if there are special requirements, can be agreed upon by both parties.
3) Casting Die Size 1 The geometry and dimensions of the casting mold shall conform to the provisions of the casting pattern.
2 The dimensional tolerances of casting moulds shall be in accordance with the provisions of GB/T 6414-1999. When there are special regulations and requirements, they must be indicated on the drawings.
3 When casting molds have shape and position tolerance requirements, reference may be made to Table 5; the marking method is in accordance with the provisions of GB/T.
4 The dimensional tolerances of casting molds do not include the casting slope, and its non-processed surface: the envelope surface is based on the small end, and the enveloped surface is based on the large end; the surface to be machined: the envelope surface is based on the large end, and the envelope surface is The small end is the benchmark. When there are special regulations and requirements, it must be noted on the drawings.
4) When the casting mold is needed, the machining allowance is to be carried out according to the provisions of GB/T15114-1994. If there are special regulations and requirements, the processing allowance must be indicated on the drawings.
5) Surface quality 1 The surface roughness of the casting mold should meet the requirements of GB/T15114-1994.
2 Casting molds are not allowed to crack, undercast, loose, air bubbles and any penetrating defects.
3 casting molds allow scratches, dents, lack of meat and mesh burrs and other defects. However, the extent and quantity of its flaws should be consistent with the standards agreed by both parties.
4 Gates, flashes, overflow ports, partitions, and ejector pins should be cleaned. But allow traces.
5 If there is no special regulation on the drawing, the setting of the die casting process, such as the position of the ejector pin, the position of the parting line, the position of the gate, and the position of the overflow port, shall be stipulated by the manufacturer. Otherwise, the pattern shall be marked or provided by both parties. Agreed.
6 Casting molds require specially machined surfaces, such as polishing, shot peening, chrome plating, coating, anodizing, chemical oxidation, etc., must be indicated on the drawing or agreed upon by both the supplier and the buyer.
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