Die Casting in China
Gravity casting provides better mechanical properties than die casting. Low pressure casting (0.1Mpa) are even better with smooth surface, uniform density and clear contour.
Gravity Casting for Nonferrous Metal (Aluminum, Copper)
For complex shapes, we can add resin sand core
Brass/Copper Gravity Casting
Material: C21000 (CuZn5), C34700 (CuZn36Pb3), C83800 (G-CuSn2ZnPb)... Standard: ASTM B806
Aluminum Low Pressure Casting
Material: A319, A356 (AlSi7Mg), A357, A360(AlSi7Mg)... Standard: ASTM B108
1. Material: Aluminium, Brass, Copper
2. Application: Automotive, marine, electrical apparatus
3. Surface finishing: Anti-oxidation treatment, coating, shot blasting
4. Standard: ASTM, DIN, JIS
Low pressure casting and gravity casting is also called permanent mold casting. The mold is made from iron, steel, resin sand. The mold is installed on a sealed furnace containing molten metal. Its pouring system consists of a riser tube connects the bottom of the mold to the molten metal bath. Once the casting has solidified, the pressure is released and the molten metal falls back into the bath, and the casting ejected in preparation for the next cycle. The pressure can be controlled and adjusted against the structure, weight and material of the casting.
Low Pressure Casting for Aluminum
Gravity casting parts have excellent mechanical properties compared with that of die casting parts. Because they have very low porosity than die casting parts. Besides, mechanical properties of permanent mold castings can be further improved by heat treatment.
Porosity and surface quality is further improved with low pressure (0.1 MPa) casting. This is why low pressure casting procedure is used for the production of aluminum car wheels.
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