In which industries is aluminium alloy gravity casting commonly employed?

Selecting the appropriate casting process is crucial, as the quality of the casting process directly impacts both the quality of the castings and the production yield. Some domestic mould manufacturers have begun employing solidification simulation to assist in casting process design. Through computer modelling of the filling and solidification processes, they identify hot spots prone to casting defects and take measures to overcome them. This approach is highly significant and effective in enhancing the reliability of casting process design and preventing unnecessary rework during mould debugging.
Moulds must possess adequate thermal capacity. A sufficiently robust mould base and modules not only effectively guarantee mould longevity but also play a vital role in regulating the temperature field during continuous operation. Some mould manufacturers, in an effort to reduce costs and conserve materials, persistently reduce the effective thickness of moulds to achieve weight reduction. They fail to realise that this not only significantly shortens the mould's service life but also makes castings prone to deformation, affecting dimensional accuracy. In severe cases, this can lead to batch rejection of castings, causing losses for foundries and, more critically, damaging the mould manufacturer's own reputation.
Moulds must incorporate reliable cooling and venting systems. Cooling not only enhances productivity but also regulates the casting's temperature distribution and controls cooling rates, thereby influencing internal microstructure and grain size to effectively manage mechanical properties. Venting, as the name implies, involves deliberately expelling gases from the cavity to minimise the risk of porosity defects. Concurrently, installing vent plugs can regulate localised mould temperatures, playing a crucial role in preventing and overcoming aluminium alloy cracking and shrinkage cavities.
Moulds must incorporate positioning devices compatible with the casting machine and a convenient installation system. Positioning devices are not only key to ensuring casting dimensions and minimising flash and burrs but also critical for the casting machine's proper operation. Indeed, without effective positioning, achieving qualified castings is impossible. Moulds must facilitate easy installation and removal. Given that aluminium alloy gravity casting necessitates periodic mould disassembly for recoating and repair, cumbersome removal procedures inevitably increase labour intensity, consume excessive working hours, and reduce output and efficiency.
For foundries, moulds directly translate to castings, signifying lower costs, higher output value, and greater profits.