Squeeze Die Casting

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The squeeze die casting, also names extrusion casting or liquid die forging, is kind of newly developed metal forming technic which combines the casting process and die forging like method. The basic principle is to fill the liquid metal into the pre-lubricated mold cavity, then gives sustained pressure to the metal, thus forming the solidifying hard-shell. The metal crystallization and solidification process is conducted under the pressure, so the defects such as shrinkage and porosity are greatly diminished. An almost defects-all-free product could be achieved by this technic.

The Classification of Squeeze Die Casting

There are 2 subdivisions of the squeeze casting aluminum: the direct squeeze casting and indirect squeeze casting. The formal technic is to give the pressure directly on the surface of liquid metal, while the last technic is to pressure the liquid maintaining in the gating part of the casting mold. Usually the direct squeeze casting has better resulted product than the indirect squeeze casting.

Advantages of Squeezing Die Casting

Extrusion casting is a process method to obtain castings (or ingots) by applying high mechanical pressure to liquid (or semi-solid) metals and metal matrix composites that enter the casting mold at a low speed so that they can be formed and solidified under pressure. Extrusion casting is the product of the combination of casting and forging, is a process between casting and forging, extrusion casting is close to forging in terms of performance. This extrusion casting process method can cast more complex pieces than forged parts. Due to the pressure molding, compared with other casting methods, the density is higher. Compared with forging, the price is relatively low because the mold is formed once.

Due to the solidification under pressure, there are fewer internal defects, close to the forging organization, so the extrusion casting parts can be heat treated.

Application of Squeezing Die Casting in Automobile Parts

At present, die-casting is a more mature process method, die-casting is cheaper, first of all, a large number of applications in the engine pressure casting, compared with sand casting has the advantages of fast and high precision. In terms of strength can meet the requirements. However, the surrounding bearing parts have a tendency to use pressurized casting. Extrusion casting: vertical filling. High-pressure aluminum alloy liquid enters the mold cavity from the bottom upwards, the gate area is larger the speed is slower, and the gas can be exhausted from the exhaust tank. Extrusion casting is suitable for making wall thickness parts. Most of the automotive parts can be made by extrusion casting, but it is not advantageous for thin-walled parts. With the increasing call for lighter cars and lighter cars requiring more and more, extrusion casting is a technology with greater prospects.

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