At present, most of the metal casing mobile phones are CNC die-casting, but in the case of a piece of aluminum, CNC time-consuming, processing capacity, and high cost; in the case of the original very weak profits, major companies try to reduce costs, CNC die-casting Processing is replaced, there are several processes, the first photo, we guess how they are handled?

One, three types of mobile phone boxes

Complete CNC packing

The full CNC telephone box is a box with the best quality through a CNC die-casting machining center.

The entire CNC process has two major drawbacks:

1) Processing time is long, about 1 hour;

2) The cost is relatively high, and some even require $200.

2. Bimetal CNC die casting box

The outermost metal is CNC die-cast, the middle part of die-casting, die-casting (English: Die Casting) is a metal casting process characterized by the use of a cavity to melt the metal to apply high pressure. Molds are typically machined with higher strength alloys and the process is somewhat similar to injection molding. Metal die casting is similar to injection molding, which is why our Aibang polymer platform introduces such an article. Most die castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin and lead-tin alloys and alloys thereof. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is required.

Advantages of bimetal forming:

1) Shorten the time, for example: 50 minutes for full CNC, and 30 minutes for CNC die casting;

2) Save costs and save at least 30% of the cost. But currently only in the internal part;

3. Full die casting in the box

The advantages are cost saving and time saving; the disadvantages are: poor appearance, anodizing is not easy; it is understood that the direct anode problem of die casting, sand holes, flow marks and lines of die-cast aluminum are inconsistent, and these problems bring great changes to the industry.

Second, why has the CNC die-casting forming yet been promoted?

Because CNC die-casting has such a big advantage, why has it not been widely promoted? The low price of a single process does not mean that the entire process can reduce costs!

We start with technical terms: pass rate. The pass rate is the product of the product from the first process to the finished product, which is the product of the throughput of each process.

CNC die casting processing is replaced

Even if the output of each program is very high, the pass rate of the full CNC mobile phone is still very low, only 50.47%; that is, only half of the phone case is qualified. (There is an exception, it is said that Apple 6 mobile phone pass rate can reach 92%)

For the first two die-cast aluminums, since they contain silicon (6-12%), copper and a small amount of iron (0.7-1.2%), they can be anodized, so the aluminum-magnesium alloy is an anode, but the disadvantage is that it should not be complicated. The structure of the workpiece, the oxide film is milky white and so on.

In short, the use of die-cast aluminum can not be used for the anode, and the effect is better, such as: aluminum manganese cobalt alloy DM32, aluminum manganese magnesium alloy DM6, but these two materials entered the domestic market for a short time, not yet popular. By the way, why not use pure aluminum die-cast aluminum? Other metals in the alloy are effective in improving fluidity and are easy to die cast.