The Difference Between Aluminum Die Casting And Aluminum Extrusion

- Feb 11, 2019-

Aluminum profiles are commonly used as screens, aluminum windows, and the like. It adopts an extrusion molding process, that is, raw materials such as aluminum ingots are melted in a furnace, and then extruded through an extruder to form a mold, which can also extrude various profiles of different sections. The main properties, namely strength, hardness and wear resistance, are in accordance with national standard GB6063. The advantages are: light weight of only 2.8, no rust, rapid design change, low mold input, longitudinal elongation of up to 10 meters. The appearance of the aluminum profile is bright and matt. The treatment process is anodized, and the surface treated oxide film reaches a thickness of 0.12 m/m. The wall thickness of the aluminum profile is selected according to the product design optimization. It is not the thicker the better on the market. It should be designed according to the cross-sectional structure requirements. It can be uneven in 0.5~5mm. The layman thinks that the thicker and harder it is, the more wrong it is.

The surface quality of aluminum profiles is also difficult to overcome: warpage, deformation, black lines, bumps and white lines. The designer's high level and the mold design and production process are reasonable, which can avoid the above defects being less obvious. Inspection defects shall be carried out in accordance with the national inspection method, that is, the line of sight is 40~50CM to discriminate the defects.

Aluminum profiles are widely used in furniture: screen skeletons, various hanging beams, table legs, decorative strips, handles, wire troughs and covers, chair tubes, etc., can be used for ever-changing design and application!

Although aluminum profiles have many advantages, there are also some unsatisfactory places:

Unoxidized aluminum material is easy to "rust" and thus leads to performance degradation, and the longitudinal strength is inferior to iron products. The surface oxide layer wear resistance is not as easy to scratch as the plating layer. The cost is higher, and the cost of iron products is higher. It is about 3~4 times.

2.1 Die-casting alloy and profile processing methods, the use of equipment is different, its raw materials are aluminum ingots (purity of about 92%) and alloy materials, melted in the furnace, into the die-casting machine mold molding. The shape of die-cast aluminum products can be designed like imaged toys, with different shapes and convenient connection in various directions. In addition, it has high hardness and can be mixed with zinc to form zinc-aluminum alloy.

Die-casting aluminum forming process:

1. Die casting

2, rough polishing to mold residual material

3, fine polishing

On the other hand, the die-casting aluminum production process should be made by a mold, and the mold cost is very expensive, which is higher than other molds such as injection molds. At the same time, mold repair is very difficult, and it is difficult to reduce the repair when designing an error.

Die-cast aluminum defects:

The amount of production and processing should be large and the cost is low. Polishing is more complicated and the production cycle is slower. The product cost is about 3~4 times higher than that of the injection molded parts. Screw hole requirements should be larger (4.5mm diameter) connection force is stable

Adaptation range: table legs, table joints, decorative heads, aluminum profile sealing parts, countertops and coffee table tops, etc., a wide range.

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