Study on technology of multifunction counter gravity casting equipment

Counter gravity casting equipments (CGCE), such as low pressure casting (LPC), counter pressure casting (CPC) and adjusted pressure casting (APC) equipments, have been extensive used in practice. However, the most equipments have the single function. In the paper, the technology of multi-function counter gravity casting equipment (MCGCE) is developed, which can perform LPC, CPC, APC. Some key technologies, such as, structure design of the main part of equipment, multifunction pneumatic control system, electric control system, and development of high performance digital assembled valve and control software have been studied. The practice application proved that the MCGCE not only meets the needs of multi-production and research in different casting type, but also has the advantages, such as high pressure control precision and safe operation.