What Is The Forming Process Of The Aluminum Shell? How To Distinguish The Quality Of The Quality?

Aluminum shell is a variety of shells made of aluminum alloy. Due to the convenience of processing, high flexibility and high grade, it can effectively increase the added value of the product and can be widely used in the electronics industry. It generally includes aluminum profile shell and aluminum die casting shell. As a more common type of packaging shell, what is the forming process of aluminum shell? How to distinguish between the quality and the quality? The following editors will introduce to you.

　　Due to the difficulty in manufacturing cold extrusion dies in China, a large number of aluminum shells can only be formed by car. It should be noted that the corners and threads of the aluminum casing processed by turning must be rounded to avoid sharp edges and burrs. At the same time, the knurling design of the connecting ring of the aluminum shell should not use cloth patterns as much as possible. Corrosion phenomena will inevitably occur in the knurled parts of the plated knurled processed parts during the salt spray detection of the coating. Relatively speaking, the corrosion degree of the straight ring knurled connecting ring salt spray detection is much lighter.

　　 Due to the loose matrix of the die-casting parts, the porosity of the plating layer after electroless nickel plating is extremely high. Because the chemical nickel layer is a cathode coating layer relative to the aluminum shell substrate, during product storage and use, once it contacts the corrosive medium in the air, it will accelerate the corrosion of the aluminum shell substrate, causing blistering and shedding of the coating.

Aluminum housing

 　　Affects the forming of aluminum shell. There are many factors, not only the process will affect the aluminum shell, the material, design, use and other aspects of the aluminum shell will affect the forming of the aluminum shell. The shape of the aluminum casing determines the quality of the aluminum casing. How can we distinguish the quality of the aluminum casing in ordinary applications? The quality of the aluminum casing is good or bad, mainly depends on the quality of the aluminum profile. What should I do to check the quality of the profile?

　　 1. Mark inspection: whether the aluminum standard and packaging are marked with the product standard code and production license number, etc.

　　 2. Surface quality: In addition to being clean, the surface of the aluminum profile is not allowed to have defects such as cracks, peeling, corrosion and bubbles, but also no defects such as corrosion spots, electric burns, black spots, and oxide film peeling.

　　 3. Thickness of oxide film: The oxide film of aluminum profile is formed in anodizing, which has protective and decorative effects, and can be tested by eddy current thickness gauge.

　　 4. Sealing quality: After the aluminum profile is anodized, many gaps are left on the surface. If the sealing is not performed or the sealing is not good, the corrosion resistance of the aluminum profile will be reduced. The commonly used methods for sealing quality inspection include acid leaching, admittance and phosphobutyric acid. In the field inspection, the acid leaching method is generally used, that is, the surface of the aluminum profile is scrubbed with acetone to remove oil and dust, and nitric acid with a volume ratio of 50% is dropped onto the surface and gently scrubbed. After 1 minute, the nitric acid is washed off with clean water and then wiped Dry, drop a drop of medical purple medicine onto the surface. After 1 minute, wipe off the purple medicine and thoroughly clean the surface. Observe the traces left. The aluminum profiles with poor sealing will leave obvious marks. The heavier the marks, the better the quality of the sealing. The worse.

The above is an introduction to the forming process of the aluminum shell and how to distinguish the quality. The aluminum shell adopts one-time die-casting technology, which has waterproof and explosion-proof characteristics, suitable for outdoor use, but the price is high, the flexibility is low, and the size and size change Can only be achieved by modifying the mold.