Custom Industrial-Grade 4G IoT Gateway Aluminum Enclosure | Pumay Aluminum Precision Machining Case

Project Background

The client specializes in industrial IoT device development and required a compact, interface-rich, thermally efficient custom aluminum enclosure for their 4G gateway PCB. The enclosure needed to support wall-mount or rack-mount installation for deployment in cabinet or fixed-wall scenarios.

 

Product Highlights

① Precision CNC Machining — Accurate Interface Layout The front panel features multiple functional cutouts: USB port, Micro SIM card slot, TF card slot, dual SMA antenna connectors (4G / BT/WiFi), RESET button, BOOT switch area, and POW/RUN/4G tri-color LED indicator windows. All openings are machined with tolerances within ±0.1mm to ensure zero-interference assembly.

Available value-added machining services include:

• CNC milling
• Press punching
• Laser processing 

② Side Heat Dissipation Fin Design The right-side panel features parallel heat dissipation fins formed through aluminum extrusion, significantly increasing the effective heat dissipation surface area. This ensures stable operating temperatures during prolonged high-load usage, extending the lifespan of the internal PCB.

③ Black Sandblast Anodizing Surface Treatment The enclosure undergoes sandblasting followed by black anodizing treatment, producing a uniform matte finish with excellent corrosion resistance and wear resistance.

The standard anodizing process includes:

• Incoming material inspection
• Degreasing & cleaning
• Alkaline etching
• De-smutting
• Anodizing
• Coloring (optional)
• Sealing 

Quality control benchmarks:

• Film thickness: 10–15 μm (decorative) / 18–25 μm (outdoor/corrosion-resistant) 
• Color uniformity: ΔE ≤ 1.0 
• Adhesion: Grade 0–1 (ISO 2409) 
• Salt spray resistance: ≥ 336h (ASTM B117) 

④ Laser Engraving — Permanent Interface Labeling All interface labels on the front panel (USB, SIM Card, TF Card, BT/Wifi, RESET, BOOT, POW, RUN, 4G) are applied using laser engraving/marking technology, ensuring clear, permanent, and wear-resistant identification.

⑤ Integrated Wall-Mount Brackets Both sides feature elongated keyhole mounting ears, supporting screw-fixed installation on walls, DIN rail panels, or equipment frames — meeting diverse industrial deployment needs.

Manufacturing Process

Aluminum Extrusion → CNC Precision Milling & Drilling → Deburring & Polishing → Sandblasting → Black Anodizing → Laser Engraving → Quality Inspection → Packaging & Delivery

Customization Services Available 

Delivery Terms 

• Lead Time: 2 business days (in-stock) | Production time varies for custom orders
• MOQ: None
• Payment: PayPal / Credit Card / T/T
• Currency: USD (RMB or EUR accepted)
• Delivery: EXW (Ex-Works)