Aluminum cable industry becomes the trend

Aluminum cable has been in China has experienced nearly eight years of promotion. Begin with zero bases, now aluminum cable technology and products have been gradually known and accepted by the market. Because of the vigorous promotion by the national Ministry of Industry, Ministry of Construction and other major management departments, the aluminum cable industry favors the main power users, such as the national grid, industrial and mining enterprises, commercial real estate, residential real estate, etc, and keeps pace with the copper industry.

Aluminum cable, as a new material, becomes an unstoppable popularity. It is the need to build a resource-saving society, is the need to save the cost of construction, and is the need for technological progress. In terms of the recent trend of the market, some large demand for cable has been shifted to choose the aluminum cable.

The popularity of Aluminum cable technology and products in China suggests that the industry's production technology, product quality and comprehensive ability have been basically mature, and the brand level has a clear guide. Those high-end users, who focus on comprehensive ability, have the courage to accept new things, and also care about the cost, have begun to pay close attention to high-quality aluminum cable brand.

The common characteristics of high-end users are to pursuit the quality and perfect applications, to fully affirm and favor that the aluminum cable and the aluminum terminal consistent with cable performance have mature connection solution, and to succeed the standardized application experience.

Stepping up the rational stage, the market of is fair. In terms of the current market trends, those high-end users who really understand the value and advantages of aluminum cable will have the first choice of the real professional high-end brands with fully complete technical products solutions. Because of the relatively poor technical ability, the mid-end users have the consciousness of the quality pursuit, but they are lack of knowledge for the real application of aluminum cable, and vulnerable to misleading from the so-called professional company. They are usually hesitant in the brand selection, and it is difficult to really get selected and used high end aluminum cable products. Low-end users basically have no real technical capacity, and poor quality awareness, so for brand selection, they only focus on low prices, so that fall into the trap of shoddy products, causing the proliferation of shoddy products on the market.

Enterprises based on comprehensive strength, product quality and other factors have formed their own brand-level pattern. Due to the different awareness of each level users, the pattern of market users in aluminum cable industry and the have gradually come into being.

The integrating of market management mechanism and the knowledge popularization of aluminum cable technology and product, I believe that the mid end users will be high-end users in line to choose the real qualified aluminum cable products, and the low-end users will certainly change the current positioning for aluminum cable demand, to more rationally choose aluminum cable brand. To be sure, the applications of cost-effective and safe-guard aluminum cable products will be inevitable choice of more and more users.

From the early promotion of the blank, difficult to cultivate, to the mid-chaos to now, the aluminum cable market has gradually moved toward mature. Although there is still unavoidable competence between copper and aluminum, the user has gradually matured with their own rational choice. Aluminum cable industry firmly believe that through the joint efforts of all Chinese aluminum profile manufacturer, with continuous improvement of the aluminum cable manufacturing technology and application conditions, the aluminum cable industry will have his day, as well as his other companions, aluminum channel, aluminum slot profile, modular aluminum profile, and etc.

Application of Aluminum profile in Mobile Phone Design (2) -- The paint flaking event of iPHONE6s

Some iPhone6S mobile phone may occur to flake paint when have been used for a time. Its surface presents random peeling spots, and the whole appearance looks rusty as if it was covered with insects, creepy and horrible. The iPhone’s value is totally decreased.

The main reason:

the previous iPhone6’s​ phone shell have also been produced with the 6 series aluminum profile whose alloy elements are magnesium and silicon and the content accounts for little, so that the anodic oxidation yield is high with a strong adhesion of oxide film to protect the aluminum profile from corrosion. Thus, the previous iPhone6 did not get rusty. But the biggest disadvantage of the 6 series aluminum is the low strength so that it is prone to bending. So the Apple Company had to choose the 7 series aluminum for aviation with a higher strength.

The 7 series of aviation aluminum used in IPhone6S has the highest strength in the aluminum at the normal temperature indoors, but also is easiest to corrosion. This series aluminum, addition to aluminum, is also composed with zinc, magnesium and copper. It is these alloy elements composed that the strength is enhanced 2-3 times the ordinary low carbon steel. The bending problem of iPhone6 ​​is solved. But the corrosion problem occurred instead.

In order to improve the corrosion resistance, the phone's aluminum shell surface will be artificial anodized, so as to improve the surface hardness and the appearance looks more beautiful as well. The quality and adhesion of the anodic oxide film directly affect the appearance quality and corrosion resistance of the phone. Due to the high quantity alloy composition of 7 series aluminum, these elements in the conventional casting process of aluminum rods is difficult to avoid uneven distribution, resulting in segregation, also known as macroscopic segregation. Partial segregation will be partially improved during subsequent homogenization and extrusion of aluminum, but can not be completely eliminated. The presence of segregation means that the distribution of material in various parts is not uniform. And the uneven composition will cause the different quality and adhesion of anodic oxide film then, resulting in defects after oxidation, such as uneven color appearance, the unstable using performance, part of oxide film peeling. Once losing protection from the oxide film, coupled with hand sweat, humid air and high temperature corrosion will be accelerated. Therefore, the paint flaking event happens on the iPhone6S.

The segregation problem of 7 series aluminum occurs along the process from casting to producing. It has been a headache problem, continually affecting the anodic oxidation. The complete solution to the problem should try to produce high end machining aluminum parts with high homogeneity and zero-segregation.

Application of Aluminum profile in Mobile Phone Design (1)

In the past, most of the phone body material is plastic with low cost and easy processing but it seems to be cheap and low-end, and the metal body is rare used. But with the development of the industry, from the flagship to retailer, the metal body suddenly began to popularize. The most common application in metal material of phone used in the well-known brands of manufacturers is the aluminum. For the outer frame, the representative phone models are iphone6 ​​/ 6S, iPhone5S, HTCM8, vivo X shot, Lumia925 and so on. Then, what does the design form of aluminum used in the mobile phones? Bellow, let me share you a general introduction.

1. Material classification:

According to the different materials, aluminum can be divided into 1 to 9 series, and each series of specific models are generally named with the four digits, such as 6061, 7075, etc. Body material of iPhone6S is the 7-series aluminum profile. The 7-series aluminum profile is mixed with the zinc based, a small amount of magnesium and copper, whose hardness is closer to the hardness of steel, but it is still prone to pits! 6 series aluminum profile is mixed mainly with magnesium and silicon elements used the most widely currently.

2. Structural design:

The Integral CNC + nano-injection molding; the decorative pieces CNC + dispensing / stickers / lock screws; the appearance surface CNC + internal aluminum die-casting + nano injection molding; forging + CNC + nano-injection methods; and so on.

3. Process: Anodization

4. Advantages: （Compared with the stainless steel）

First, aluminum material is easier to present the high-grade, beautiful and shiny feeling. Second, the aluminum material is very light, only one-third of stainless steel, which means with the same volume, the stainless steel mobile phone is almost three times the weight of aluminum. This is why iPhone5 is so much lighter than iPhone4S. Third, it is scratch-resistant. Aluminum material does not have the top strength, but the surface hardness has reached the sapphire level, so the use of aluminum phone may have bump signs, but few scratches. Fourth, the aluminum dyed strong. Because of the aluminum profiles, iPhone and other mobile phones are able to contain different color types, such as gold, high-end gray, etc. Fifth, aluminum materials also have the advantages of high-temperature resistance, leaving no fingerprints, anti-static, environmentally friendly, non-toxic and so on.

5. Disadvantages: High cost

6. Casting process

In regular casting process, because the cooling rate in the metal solidification is slow (generally <102 ℃ / s), the alloy elements are prone to segregation and continued growth, seriously affecting the material uniformity. However, with the rapid cooling process, the cooling rate is speeded up (up to 104-106 ℃ / s), and the liquid metal has a great degree of subcooling which promotes the nucleation. Metal in a very short time is hard to complete the solidification so as to inhibit the further growth of grain nucleation and the branches Crystal and columnar crystals in common casting, and form an equiaxed crystal approximately with spherical shape, eliminating the anisotropy of conventional materials. Due to the fine grain structure, the metal produces effect to fine grain strengthening, which greatly improves the strength, hardness and plasticity of the profile. The profile solidification in the rapid cooling process is carried out in the protection of the inert gas. With no oxidation, inclusions, and the fine and hard phase dispersing, the uniform dense tissue is favorable for the quality and uniformity of the anodic oxide film, and the corrosion resistance is improved at the same time.

Processing Performance and Characteristics of Aluminum Pipe

Aluminum pipe is including a lot of types. According to its strength characteristics and processing performance, the extrusion methods of aluminum pipe are generally divided into three categories, pure aluminum, soft alloy and hard alloy pipe. Extrusion pure aluminum and soft alloy pipe are easier, with a requirement of high deformation and good surface. On the contrary, extrusion of the hard alloy pipe is more difficult because it asks that the relatively less deformation and greater equipment property, and besides, the surface is also prone to various defects. Therefore, for the hard alloy pipe, the technical operation has high requirements, processes are many and complicated, the production cycle is long, and mold consumes much more with high cost and lower yield.

Aluminum pipe requires high surface quality, but its hardness is low, especially in the hot state. So during the production and shipment, it should be very careful and can not bump hard things, which requires in the production and lifting, you should lift carefully and protect surface.

Aluminum pipe extrusion is prone to phenomenon of sticky aluminum, and it often happens to stick on the machine to cause the various defects in the pipe inside and the surface outside. Therefore, in the extrusion, in addition to the use of process lubrication, the surface finish and hardness of the machine are required strictly. All surfaces contacting with the pipe should meet the processing requirements.

Except that the pure aluminum has no requirement on the extrusion speed, the other pipes have its own appropriate extrusion speed requirement. So, you need to select the speed-adjustable extrusion machine.

Much aluminium extrusion is welded at high temperatures and pressures, giving favorable conditions for the production. For example: extrusion of the plane combining mold and the tongue mold takes the advantage of that to produce pipe. Not only has this enlarged the variety, specification and uses, but also you can extrude the pipe and the hollow profile with complex section with solid ingots on a conventional single-acting extruder.

At the appropriate process conditions, perforation extrusion can be used. During the perforation, the inner surface of the extruded cylinder and the surface of the perforated needle both are adhered to a completed metal sleeve which should be kept clean and completed in order to produce a high quality pipe. Otherwise it will deteriorate the pipe including the inner and outer, resulting in bubbles, peeling and scratches.

In order to ensure the dimensional accuracy of the pipe, you need to reduce the wall eccentricity to prevent from needle broken and machine damaged and try to ensure neutrality.

Aluminum pipe is not suitable for peeling and extrusion. The main reason is that the shell is destroyed and difficult to be removed.