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New breakthrough in nonferrous casting sector
2025-05-09
With the rapid development of the global new energy vehicle industry, lightweighting has become a core competitive factor in the industry. Different parts have different requirements for material performance, structural strength, manufacturing precision and cost control, which has led to diversified innovations in casting processes. Although high-pressure die casting (HPDC) has excellent performance in efficiency and integration, low-pressure casting (LPDC), squeeze casting, differential pressure casting, gravity casting and other processes have continued to break through technical boundaries in key parts such as battery pack housings, motor brackets, and chassis structures with their unique advantages, and jointly build a complete ecological chain for lightweight manufacturing of new energy vehicles.
Low pressure casting: precision shape control and performance balance
Low-pressure casting is a process that injects molten metal into a mold at low pressure. It is suitable for producing complex thin-walled castings with advantages such as high precision and low porosity. At present, the application of low-pressure casting technology in automobiles is mainly concentrated in motor housings, subframes, engine blocks, wheels, steering knuckles, control arms, battery housings, etc.
Squeeze casting (liquid die forging): casting solution with forging-grade properties
Squeeze casting, also known as liquid die forging, is a process method that applies high mechanical pressure to the liquid (or semi-solid) metal entering the extrusion casting cavity to shape and solidify it, thereby obtaining a casting. At present, this process is widely used to produce various levers, wheels, brackets, shells, and round tube castings made of aluminum alloys, magnesium alloys, zinc alloys, copper alloys, iron and steel, and their metal-based composite materials. The first part of the whole process of squeeze casting is casting, and the end is forging. Therefore, the performance of the casting is comparable to that of the forging, and it is widely used in the automotive, machinery, shipbuilding and aviation industries.
Differential pressure casting
Differential pressure casting is a process in which liquid metal is filled into a mold with a certain pressure in advance under the action of pressure difference, and then crystallized and solidified to obtain a casting. It is suitable for producing various types of complex thick-walled or medium-thick high-quality castings, and is suitable for aluminum alloys, zinc alloys, magnesium alloys, copper alloys, cast iron and cast steel, especially aluminum and magnesium alloys. The castings produced include motor housings, valves, impellers, cylinder blocks, wheel hubs, missile cabins, supercharger turbines, etc.
Gravity Casting
Gravity casting is a process in which aluminum liquid is poured into a mold by gravity under the action of the earth's gravity. Compared with die casting, gravity casting has lower mold costs and longer service life. Gravity casting aluminum castings have fewer internal pores and can be heat treated. It is suitable for both large-scale production and small and medium-scale production, and can produce aluminum castings with complex shapes. Nowadays, automation and intelligence are used in gravity casting, further improving production efficiency and product quality stability. The intelligent monitoring system can monitor parameters such as casting temperature, speed, mold temperature, etc. in real time to ensure the smooth progress of the production process.