On the new ecology of mobile phone shell material and processing technology

From November 5th to 6th, “2017·Mobile phone shell material and processing technology development trend forum” was held in Dongguan, a major mobile phone manufacturing industry. More than 600 mobile phone industry raw material suppliers, mobile phone manufacturing and processing equipment suppliers, mobile phone parts Suppliers and well-known mobile phone brand manufacturers gathered together to explore the future development of mobile phone shell materials and processing technology.
As the guests said, the innovation of smartphone materials and processes is imminent.

Evolution of mobile phone materials
From Motorola's development of the world's first mobile phone, and then to the emergence of Iphone redefining the smart machine, the mobile phone industry is a lot of floating, after many rounds of reshuffle.
From the perspective of the outer casing material, the smart phone industry is faced with a variety of choices such as plastic, glass, metal and ceramics. Consumer electronics and 3C communication products such as mobile phone casings must have both aesthetic and practical features, and many complicated curved surfaces. For consumers, the casing material is increasingly becoming an important factor in selecting smart phones.
As a well-known domestic supplier of LDS materials, NMT materials and special nylons, Xu Jiusheng, general manager of China Plastics Group Co., Ltd., Guangdong Plastics Co., Ltd. shared the three types of materials for mobile phone materials application, LDS materials, NMT materials, special nylons. .
“NMT can meet the higher bonding strength through the combination of metal and material at the nano-level, and at the same time meet the acid and alkali resistance requirements of the anode treatment, and make the product have the strength and appearance of metal in the product design.” Xu Jisheng said that Zhongsu currently A selection of PBP and PPS substrates has been developed and a range of products have been developed. With the large-scale use of AMOLED screens by mainstream mobile phone manufacturers, the 3D glass cover with curved design and matching curved screen will also shine.
Chen Yajun, executive vice president of Dongguan Aojin Glass Products Co., Ltd. believes that "2.5D or flat glass can be bonded and pasted with a simple PC film, but 3D can't. The company's current 3D glass processing uses a plastic spraying process. With the addition of optical coating, plus laser engraving, etc., the 11-step process has greatly improved the yield." As the new darling of the mobile phone industry, ceramics also sparked heated discussions among the participants. Tian Wei, chairman of Zhaoqing Daxie Technology Co., Ltd. stated that “the zirconium oxide has a dielectric constant three times that of sapphire, and the signal is more sensitive. It is especially suitable for fingerprint identification cover, which is not limited by equipment, and the total cost is only 1/4 of sapphire. In terms of wireless charging, it is more suitable for wireless charging than metal and plastic." Dr. Liu Zifeng from a world-renowned mobile phone brand shared the application status of structural ceramics in the mobile phone industry in a humorous way and won applause again and again. Dr. Liu Zifeng believes that although the current ceramic mobile phone has gone a lot of detours due to the closure and confusion in the industry, the industry has already developed greatly, and said that "the 5G era is coming, inorganic materials will become the mainstream of mobile phone casing materials, ceramics The trend of temperament and the appearance of mobile phones is unexpected. The industry is calling for heroes to eliminate the gap between the ceramic industry and the mobile phone industry. As the main force of the metal casing of mobile phones, aluminum alloy has been used in mobile phones for a long time.
“Mobile phones are the largest market segment for aluminum alloy applications in the consumer electronics field.” Liu Zhijie, a research and development engineer at Jinqiao Aluminum, said that before and after 2011, aluminum alloys began to be applied on mobile phone casings, and the technical process of aluminum alloys is now more and more mature. Applications are also becoming more widespread. Liu Zhijie believes that aluminum alloys are also easy to process, have high aluminum strength and have excellent decorative properties. In particular, the 7-series aluminum alloy has high strength, good stability and good decorative properties.
The materials and processes are in the same category, and the innovation of the process is becoming more and more prominent in the smart phone industry chain.

Innovative process
As an important process for mobile phone processing, the discussion about the technology of powder injection molding (MIM) technology has always been the focus of the industry. As Dr. Qiu Yaohong, the technical director of Shenzhen Xindi Technology Co., Ltd. said, “The key parts of China’s MIM industry are inseparable from metal card and high-strength connectors. In just a few years, MIM came to China from Taiwan and became Fortunately, our MIM powder metallurgy technology has caught up with the international pace of the world's largest MIM manufacturing region." “NFT+MIM can produce sophisticated and complex product structures that cannot be processed by CNC. The product structure has high hardness and high production efficiency.” Liang Shijie of Shenzhen Changying Precision Technology Co., Ltd. also agreed with this and stated that “Applicable to NMT process Materials, metal parts include aluminum and stainless steel, other magnesium, copper, titanium alloys are less used, the most commonly used parts of plastic are PBT and PPS." PAP products are made with several obvious features, such as fashionable appearance, relatively reliable surface structure and large color selectivity, and strong transparency. Lu Liying, general manager of Shenzhen Shanghongbo Industrial Co., Ltd. shared his years of experience in mobile phone PAP polishing process. He also said that "the process of PAP is very high and very demanding, whether it is from raw materials, from processing, from polishing process to finalization to consumers." Shi Shujie, general manager of the electronic business group of Taiwan Pinda Technology Co., Ltd. shared the innovative processing technology of metal case of mobile phone, and said that “3D forging process has a series of advantages such as rapid mass production, complete forming, high cost performance, etc. If the mobile phone becomes double When designing the face glass, using high-speed forging +CNC, the frame + middle plate integration is a good solution." For the processing of difficult-to-machine materials such as stainless steel and liquid metal, Li Qing, general manager of Guangdong Luhai Aviation Technology Co., Ltd., said in his speech that “the material properties of stainless steel and liquid metal are hard, and the damage rate of the tool is high through ordinary processing techniques. High processing cost and low processing efficiency."Luhai Aviation Technology Co., Ltd. electrolytic processing technology can effectively process high strength by using a method in which the metal dissolves in the electrolyte to remove excess material on the workpiece and shape the part. Metal materials such as high hardness and high toughness. 3D composite materials are applied on mobile phones. Traditionally, 3D back cover high pressure molding, IML molding, and 3D back cover film processing. Guo Yongda, general manager of Shenzhen Xinyi Precision Technology Co., Ltd. R & D Center gave a solution for 3D thin glass + plastic, 3DTPU + plastic. For the surface metallization and stereo circuit application of non-metallic materials, Zhang Zhijun, general manager of Shenzhen Lesmaidi Stereo Circuit Technology Co., Ltd. said that Lesmaidi's new manufacturing method can be used in polymer materials, composite materials and inorganic materials. Surface metallization can be achieved. As a mobile phone manufacturing industry service provider, Sun Gang, Director of Cooling Dry Ice Equipment (Shanghai) Co., Ltd., China, showed us the dry ice cleaning technology in removing burrs, abrasive cleaning, fingerprint identification chips and mobile phone motherboards through a small screen. Innovative applications on cleaning. The development of the mobile phone casing is inseparable from the injection molding machine. Zhang Guoxian, Director of Marketing and International Trade of Donghua Machinery Co., Ltd., shared the injection molding machine for the 3C industry in the mobile phone industry.
“As a mobile phone and 3C market, the requirements for injection molding machines are very high. Many innovative processes actually require high requirements for injection molding machines.” Zhang Guoxian believes that new materials will have new processes and new requirements. For example, the thinner the product, the more economical the material, the more and more colors, and the thinner the wall thickness. The accuracy is also required to be higher and higher, and the requirements for the injection molding machine are very high. New waterproof trend
For consumers, the most worrying thing about using mobile phones is that mobile phones are flooded. After all, electronic products are basically scrapped after they enter the water. Waterproof materials and processes for mobile phones have always been a difficult and important point in the industry.
“While smartphones are not growing as fast as they were in previous years, they are still growing. The number of feature phones is shrinking, and the proportion of smartphones is increasing. So the waterproof function of mobile phones is also part of the active layout of major brands.” Wang Changming, R&D director of Guangdong Jinsheng Precision Components Co., Ltd. said that the growth of waterproof models in the future should increase by 20% and 30%. There may be a waterproof model that is gradually being worn on the wearer and tablet.
Wang Changming believes that the surface of the solid silica gel is self-lubricating after curing, and the assembly is smoother and feels better. It has been recognized by many big brands. Shin-Etsu Silicone International Trading (Shanghai) Co., Ltd. Guangzhou Branch Shi Yan is sharing the application of liquid silicone rubber micro-injection in the waterproofing of 3C products.
“Liquid silicone rubber itself has no adhesion to metal or plastic, but Shin-Etsu has developed a self-adhesive silicone rubber and silicone rubber injection.” Shi Wei said that it can achieve good results for PC, PA and metal. The bonding effect. Xu Chaosen, Sales Manager of Guangzhou Haisheng Machinery Equipment Co., Ltd. said that Haisheng Machinery is mainly used in the production of liquid silicone rubber and application equipment for liquid polymers such as polyurethane. Applications include liquid silicone rubber, cable accessories, and solar panel adhesion. Wait. ” "Silicone is widely used, and the application industry is also very wide, such as smart wearable devices, mobile phone protective cases, 3C products and daily necessities as well as kitchen supplies, auto parts, medical supplies, sporting goods." Shenzhen Kai Lexing Chen Jigui, general manager of Science and Technology Co., Ltd. said that silica gel color should pay attention to ultraviolet aging, high temperature aging and acid and alkali resistance. For waterproofing, Shenzhen United Sino Technology Co., Ltd. brings its new ACT nano waterproof material and its practicality.
“Union Sinuo has 10 protected patents and products that can protect electronic products according to customers' actual conditions, including protection against rain, soaking, accidental water falling. The ANG series can also protect different products. Materials, including circuit boards, glass, plastics, fabrics, etc." Liao Zheyi, technical manager of Shenzhen United Sino Technology Co., Ltd. believes that the greatest value of ACT nano waterproof materials is to bring great excellence without affecting customers' product design. Waterproof effect. The spark of thought was a fierce collision at the seminar. The wonderful speeches of many heavy guests were warmly applauded by the guests.

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