Squeeze Casting VS Die Casting

squeeze casting vs die casting

Squeeze casting and die casting are two widely used metal casting processes, and they have many similarities as well as differences. How to make the right choice between squeeze casting and die casting? In order to find the answer, this article will discuss the principles, similarities and differences of these two casting processes.

Die Casting

The “die casting” mentioned in this article refers specifically to high-pressure die casting. Its principle is to use high pressure to inject molten metal into a precise mold cavity, and then the molten metal cools and solidifies under the pressure to form a casting. The typical characteristics of die casting are high pressure and high speed.

Squeeze Casting

Squeeze casting, also known as liquid forging, is a manufacturing technology that combines casting and forging. It is an improvement over traditional die casting and can effectively eliminate common casting defects such as shrinkage and porosity. Its typical characteristics are low-speed  filling and high-pressure feeding and solidification.

Similarities Between Squeeze Casting And Die Casting

Squeeze casting is an improvement on the traditional die casting process and there are some similarities between them.

The same working principle. The basic principles of squeeze casting and die casting are both based on liquid metal molding, and both involve the process of filling and solidification of liquid metal under pressure.

Both are highly efficient. Because of their efficient production processes, both squeeze casting and die casting are suitable for casting large quantities of parts. And both processes can further improve production efficiency through automation and intelligence.

Both can cast precision parts. Squeeze casting and die casting parts are produced with high dimensional accuracy, thanks to the precise mold. Consistency and reliability of parts can be ensured through the design, machining and maintenance of molds, as well as the control of process parameters.

Both are widely used. The applications of squeeze casting and die casting involve automotive, electronics, telecommunications, aerospace, medical and other industries.

Differences Between Squeeze Casting And Die Casting

Although squeeze casting and die casting have certain similarities, they have obvious differences in the following five aspects.

Different filling speed.  Die casting filling speed up to dozens of meters per second (usually 30-60 m / s), while the squeeze casting filling speed is only 0.4-0.7 m / s. The reason for this is that squeeze casting requires the molten metal to fill the mold in a laminar flow state, which can reduce entrained air.

Different filling speed of squeeze casting and die casting

Different pressure standards. Squeeze casting pressure is generally close to or even more than 100 MPa, while die casting is generally only a few tens of MPa. This is because squeeze casting requires the realization of high-pressure shrinkage and dense internal grain.

Different pressure purposes and transfer methods. In die casting, the main function of pressure is mold filling. In the subsequent pressure holding process, the gate solidifies first due to its small area, and the pressure cannot fully act on the parts during the pressure holding period; while the gate of squeeze casting is larger, so the pressure transmission is smoother. The parts solidify and form under more pressure.

Different solidification methods of squeeze casting and die casting

Different product quality. Die-cast products are characterized by complex shapes and high dimensional accuracy, but there are pores inside and cannot be heat treated. However, there are no casting defects such as pores, shrinkage porosity, cracks, etc. inside the squeeze casting products. Their mechanical properties far exceed those of die castings and are close to or even exceed those of forgings.

Different applications. Die casting is mainly used to solve the forming problems of thin-walled complex parts, so it is mainly used to produce complex, thin-walled parts, and people do not have excessive requirements for the mechanical properties of die-casting parts. Squeeze casting is mainly used to solve the density problem of thick-walled and important parts and to produce castings with high performance requirements.

Squeeze Cast And Die Cast Products

Below are squeeze cast and die cast parts made by SANON. If you have related needs, please contact us.

Die Casting Parts

Squeeze Casting Parts

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Eric Zhou

Focus on providing squeeze casting, aluminum die casting(hpdc+lpdc), mold making, CNC machining, and sheet metal fabrication solutions. If you need help, please feel free to contact us!

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