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Die casting process of fan impeller castings
- Aug 17, 2018 -

The fan impeller casting is cast by the process of mold preparation, filling, injection and falling sand. In the preparation process, it is necessary to spray lubricant into the cavity. In addition to helping to control the temperature of the mold, the lubricant can also help. Release the casting.


The mold can then be closed and the molten metal injected into the mold with a high pressure, which is in the range of about 10 to 175 MPa. When the molten metal is filled, the pressure is maintained until the casting solidifies. Then the putter will roll out all the fan impeller castings. Since there may be multiple cavities in one mold, multiple castings may be produced during each casting process.


During the casting process, the process of falling sand requires separation of debris, including mold openings, runners, gates, and flash edges. This process is usually done by extruding the fan impeller casting through a special dressing die. Other sand falling methods include sawing and sanding.


High pressure injection results in a very fast filling of the mold so that the molten metal can fill the entire mold before any part solidifies. In this way, surface discontinuities can be avoided even in thin-walled portions that are difficult to fill. Most die castings can be finished by secondary machining to complete structures that cannot be completed by casting.