Henry Ford once said, "If I had asked people what they wanted, they would have said 'a faster horse.'" If one focused solely on breeding better horses, they might become a master in horse breeding but would never lead the wave of the automotive industry. A world without extreme pursuit would ultimately settle for mediocrity. The "apple" that changed the world is not just the one that fell on Newton but also the one in Jobs' hand-the electronic universe he commanded. The bite taken out of it transformed an ordinary fruit into something extraordinary. This article pays tribute to Jobs and the manufacturing partners who turned ideas into reality.
From pagers as symbols of wealth to the nearly ubiquitous Nokia 5300 and today's trendsetting iPhone, mobile terminals, like "swallows that once nested in the halls of the wealthy," have long flown into ordinary lives. Placing the Nokia 5300 side by side with today's flagship devices, even setting functionality aside, most people's preference based on texture alone is clear. In the era of plastic bodies, it was hard to imagine the feel and luster of metal. Yet once experienced, it's difficult to go back-this is the essence of industrial evolution.
Since the first-generation iPhone adopted an aluminum alloy back panel in 2007, the manufacturing of metal phone bodies has evolved over nearly two decades. Kunshan, as a key hub in Apple's supply chain, relies on industry leaders like Foxconn and has developed mature processes and a complete industrial cluster, attracting a concentration of precision manufacturing enterprises. In an era where mobile phones have become a "digital organ" of the human body, the scale and cost control of their metal mid-frame manufacturing are particularly critical. Below are the core processing steps:
1. Aluminum Extrusion and Cutting
Aluminum ingots are extruded into plate profiles and cut into phone blanks, akin to customized "aluminum profiles."
2. Rough Milling of the Inner Cavity
Preliminary machining of the internal space to accommodate components like the mainboard and battery.
3. Milling Antenna Slots
Metal shields signals, so high-precision milling is required to create antenna breaks, ensuring communication transmission.
4. T-treatment and Nano Molding Technology (NMT)
Chemical etching (T-treatment) is applied to the metal surface to create nano-scale pores, followed by injection of engineering plastic. The two materials anchor together at the microscopic level, enhancing structure and enabling signal window isolation.
5. CNC Precision Milling of Curved Surfaces and Sides
Precision computer numerical control milling shapes the sleek exterior contours and refined tactile feel.
6. Anodizing
A two-step process: the first generates a hard anodized aluminum layer to improve wear resistance; the second optimizes the surface microporous structure. The anodized film itself is transparent, providing a base for subsequent dyeing.
7. Milling Grounding Points
Local removal of the anodized film exposes the metal base, ensuring grounding and electrical connectivity.
8. Hot-Melt Nut Assembly
Threaded inserts are thermally fused into place for subsequent mechanical fastening of the mainboard and modules.
9. Industry Standardization
The processing workflows of mainstream brands are largely similar. The diagram below compares the typical processes of the OnePlus 5 and iPhone 6 as examples.
(A flowchart or comparative diagram can be inserted here)
Steve Jobs was undoubtedly a great product visionary, though his obsessions and authoritarian style were not without controversy. On the manufacturing side, Kunshan has developed a highly concentrated industrial ecosystem. Since its establishment, Kunshan Duyang has continued to deepen its expertise in the consumer electronics manufacturing sector of the Yangtze River Delta. As a primary supplier to Wistron, we have accumulated extensive precision manufacturing experience. If you have needs for production line expansion or equipment procurement in the 3C industry, feel free to contact us. Duyang offers professional prototyping services to help bring your product from blueprint to reality.
