Apple white steel can be polished twice.
Polishing refers to a processing method that uses mechanical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and smooth surface.
The entire Iphone and the reflective logo require a more complex polishing process.
Such a delicate process
After the mobile phone structural parts have been forged, stamped, injection molded, and CNC, the surface texture will be very rough, burrs, dirty, etc., and the subsequent procedures must undergo some surface treatment In order to meet the ID appearance requirements. Polishing is a common surface treatment process.
The mobile phone consumers see looks like this:
Is it handsome?
In fact, the semi-finished mobile phone without surface treatment looks like this:
Like a battle-damaged version
Application of polishing technology on mobile phone casing
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Apple's various series of products
The comfort, exquisiteness, and purity of mobile phone cases are important experiences that satisfy users' fresh touch.
Mobile phone casings are mainly made of metal, ceramics, plastic, glass and other materials.
Today we focus on the polishing of mobile phone metal materials
Apple in process
The SUS316 stainless steel frame of the Apple 4S mobile phone has been CNC milled. There are obvious cutter milling lines. Before using traditional polishing, the cutter milling lines must be smoothed with an abrasive belt (standard process: #320-#400-#600). After the cutter milling lines are smoothed, polishing can be carried out. , the new and improved process, if the JacksonLea high-efficiency black BK chemically treated bias-cut hemp wheel is directly used, coupled with our special cutting power polishing slurry, and combined with an eight-head intermittent disc polishing machine, it can polish the sand. The flattening process is omitted and a flat and bright surface is efficiently achieved. Not only does the production efficiency increase by more than 100%, but the first-time yield also exceeds 97%. After the polished surface is completed, it is then sandblasted to achieve the final high-grade satin effect.
Rebirth from the ashes
The aluminum alloy casing of iPhone 5-iPhone 6-iPhone 7 mobile phones is CNC carved and shaped - grinding - high gloss - natural color plating - covering - anode - unblocking Into a complete mobile phone case panel. Aluminum alloy mirror polishing is relatively difficult, and it is completely impossible to achieve its requirements by hand polishing. The process of mirror polishing with a surface grinder is mainly divided into two processes: the first step, white polishing leather + alumina rough polishing liquid, Make the surface form a matte surface (change: remove the CNC knife pattern); the second step, damping cloth + silica polishing fluid, achieves an ideal super mirror surface in just ten minutes.
Glossy back shell
iPhone 7 gloss black-iPhone 8 A relatively special process magnetorheological polishing
One polishing:
< p>After CNC processing and forming, the aluminum alloy parts of Apple 7 need to be polished for the first time. The first polishing needs to achieve a high-gloss effect, otherwise the final high-gloss effect will not be achieved.Second polishing:
After the first polishing, the aluminum alloy parts need to continue to be anodized. After anodizing and coloring treatment, the oxide film is polished again to achieve the final highlight effect. Apple uses a magnetorheological polishing process for this process.
Magnetorheological polishing can achieve extremely low roughness. It is generally used for polishing precision optical lenses and is suitable for the final light processing of workpieces. During magnetorheological polishing, since the entire workpiece is in liquid, the polishing heat is easily dissipated and will not cause overheating in local parts of the workpiece, which is helpful to avoid orange peel during polishing; all parts of the entire workpiece are in uniform contact with the fluid, ensuring polishing The effect is uniform and consistent, and is not limited by the shape of the workpiece. It is especially suitable for polishing non-planar parts with protruding craters like the Apple 7.
High-precision camera ring
The stainless steel camera ring of iPhone 12, Apple’s quality requirements, in addition to the high-brightness mirror, must also be in the lens of the microscope magnifying glass Next, it achieves a completely texture-free full mirror surface.
If this polishing process can only be completed in one process, in addition to selecting a cloth wheel of suitable material (please contact Jiangmen Jielixin Polishing Materials Co., Ltd. for usage plans), in addition to selecting a polishing slurry, In addition to the ability to remove grain and cut, it must not leave any polishing lines or marks on the surface of the workpiece, and it can achieve a high mirror effect. We generally call it a two-in-one polishing wax. Therefore, the abrasives used in this polishing slurry are the key conditions. It is difficult for commercially available industrial-grade polishing slurries to meet this requirement. This special polishing slurry uses nano-scale abrasives, which can be polished in one pass. This high-quality requirement, and the first-time yield rate reaches more than 95%.