The Reason Why Aluminum Die Casting Manufacturing Turns Black

Aluminum die casting manufacturing is made by die casting process. ; This is a die-casting machine equipped with a casting mold, pour heated liquid copper, zinc, aluminum or aluminum alloy into the inlet of the die-casting machine, and then die-cast by the die-casting machine. Thus, casting copper, zinc, aluminum parts or aluminum alloy parts whose shape and size are limited by the mold. Such parts are often called die castings; parts.

Aluminum die casting manufacturing is a hot product in the die casting industry today. Because aluminum has the advantages of good thermal conductivity and light weight, it is widely used in automobile manufacturing, internal combustion engine, motor, oil pump manufacturing, electronic communication parts production and other industries. At present, there are many aluminum alloy die-casting technologies suitable for various industries, mainly used for automotive die-casting parts and communication, motor casings, electric vehicle battery casing die-casting parts, etc.

Because aluminum alloy has good fluidity and plasticity, and the casting process is cast in a pressure die-casting machine, aluminum die-casting parts can be made into various complex shapes, which are suitable for die-casting production in many industries. In addition, aluminum die casting manufacturing has higher precision and smoothness, which greatly reduces the processing amount of castings and the casting allowance of aluminum alloy. Therefore, aluminum alloy die castings not only save electricity and metal materials, but also greatly save labor costs.

Aluminum metal and aluminum alloy have good fluidity and plasticity, but they tend to turn black during use. Why? The following is aluminum die casting manufacturing:

1 The reason for the blackening of the surface. unreasonable process design

Improper handling of aluminum die casting manufacturing after cleaning or pressure inspection creates conditions for the blackening of aluminum alloy die castings and accelerates the generation of mold.

2. Improper storage management

When aluminum die casting manufacturing is stored at different heights in the warehouse, the mold conditions are also different.

3. Aluminum alloy internal factors

Many aluminum die casting manufacturing manufacturers do not perform any cleaning treatment after the die-casting and machining processes, or just rinse with water, which cannot be cleaned thoroughly. The surface of die-casting aluminum has corrosive substances such as mold release agents, cutting fluids, lubricants, saponification fluids, etc. And other stains, these stains accelerate the formation of black spots on aluminum alloy die castings.

4. Aluminum alloy

External environmental factors Aluminum is an active metal, which is easily oxidized into black or moldy under certain temperature and humidity conditions, which is determined by the characteristics of aluminum itself.

5. The choice of cleaning agent is not suitable

The selected cleaning agent is highly corrosive, causing corrosion and oxidation of the die-cast aluminum.

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