Custom OEM ODM Custom Round Touch – Sheet Metal Enclosure Manufacturer

The manufacturing of circular display metal enclosures is a symphony of precision machining and materials science. It begins with stamping to shape the prototype, relies on CNC precision machining to define every detail, and finally transforms cold metal into an industrial work of art that combines robust structure, reliable protection, and ultimate aesthetics through advanced surface treatment and sealing technology.

1. Core Forming Process: Integration of Stamping and CNC Precision Machining

Due to its unique circular structure, the main body typically abandons the extrusion process used for rectangular screens, instead employing a combination of high-strength precision stamping and multi-axis CNC machining centers.

Deep Drawing: First, deep drawing molds stretch aluminum or stainless steel sheets under immense pressure to form bowl-shaped or lid-shaped preliminary shapes. This requires materials with exceptional ductility (such as 5-series or 6-series aluminum alloys).

CNC Precision Machining: The stamped blanks are secured on high-precision CNC machines for a series of finishing operations including turning, milling, and drilling. This is the critical step for achieving the final form: machining ultra-thin wall thicknesses, creating precision steps for display and front cover mounting, milling internal reinforcing ribs and screw pillars, and drilling all micro interface holes and heat dissipation vents. The entire process ensures millimeter-level roundness tolerances and flawless surface continuity.

2. Structural Reinforcement and Joining Processes:

Pure circular shell structures require additional strength reinforcement. A common approach involves designing and CNC-milling concentric or radial rib networks within the shell. This significantly enhances resistance to distortion and impact without adding noticeable thickness. For large circular displays, the shell may adopt a split design with a front bezel and rear housing, connected via high-strength die-cast zinc alloy corner brackets or clips to ensure overall rigidity.

3. Surface Finishing Process: Uniform Curved Surface Aesthetics

To achieve 360° flawless aesthetics, surface finishing demands exceptional precision.

High-gloss diamond cutting: During CNC finishing, diamond tools perform high-speed milling on the outer edges to create mirror-like high-gloss chamfers (CD patterns), forming a striking visual contrast with matte surfaces.

Curved Surface Sandblasting & Anodizing: This is the most classic combination. The entire shell undergoes precision sandblasting to achieve a uniformly consistent matte-satin base. It is then subjected to hard anodizing. Through specialized fixtures and electrolyte formulations, the oxide film grows uniformly even on complex curved surfaces, ensuring stable coloring. This yields premium finishes like deep space gray and matte black, coupled with exceptional wear resistance and corrosion resistance.