Low-pressure casting began in the early 20th century and was the first to be industrialized in Europe and the United States. It is the mainstream mature process for aluminum alloy precision casting. In the early days, it was mostly used in the production of containers and pipe fittings. Now it is widely used in the manufacturing of high-end castings such as automobile wheels, engine cylinder heads, and new energy structural parts. This process has smooth mold filling, dense castings, fewer defects, and high yield, but the production pace is slow and the equipment investment is high. After years of technological upgrades, it has now achieved automation and precise pressure control, occupying an important position in the field of lightweight and high-quality casting. Our low-pressure die-casting products cover the fields of automobiles and trucks, ships and marine, engineering machinery, new energy, impellers and robots.

The filling process of this process is gentle and controllable, does not produce strong impact or air entrainment, and can effectively reduce defects such as pores, slag inclusions, shrinkage and porosity, and is especially suitable for the molding of non-ferrous alloys such as aluminum alloys.
Low-pressure casting has significant process advantages: the castings have high density, good air tightness, can be strengthened by heat treatment, the material utilization rate can reach more than 90%, no large risers are needed, the production process is stable, and the defect rate is low. Compared with gravity casting, low-pressure casting fills and solidifies under pressure. The interior of the casting is denser, the wall thickness is more uniform, and the molding accuracy is higher. Compared with high-pressure die casting, low-pressure casting fills the mold more smoothly, has fewer internal pores, can be welded and heat-treated, and is more suitable for key structural parts with high requirements for strength, air tightness, and reliability. With the advantages of high molding quality, good mechanical properties, high dimensional accuracy, and high material utilization, low-pressure casting is widely used in the production of automotive wheels, engine cylinder heads, gearbox casings, new energy vehicle structural parts, aerospace parts and other products that require extremely high strength and air tightness. It is a mature and representative precision forming technology in modern high-end equipment manufacturing.

• The initial investment cost is high: the cost of special equipment, sealed holding furnaces and metal molds is high, the structure is complex, and the manufacturing cycle is long, making it more suitable for medium and large-volume production.
• Low production efficiency: The mold filling and pressure holding solidification time are long, the single-piece cycle is higher than that of high-pressure die casting, and the production efficiency is relatively low.
• High cost of consumables and maintenance: crucibles and riser tubes are exposed to high-temperature molten metal for a long time and are susceptible to corrosion and thermal fatigue damage, so they need to be replaced regularly. Traditional iron pipe fittings also have the risk of iron contamination, and ceramic riser tubes are now used to improve them.
• Limited structural adaptability: It is difficult to form extremely complex structures with deep cavities and multiple dead ends, and the mold exhaust and cooling design requirements are strict.