Custom Sheet Metal Solutions for 19-32 Inch Touch Industrial Displays

Project Background

As the global industrial automation and smart terminal industries accelerate, a leading industrial display manufacturer launched a 2026 customization project for 1,800 sets of precision sheet metal enclosures, tailored for 19-32 inch touch industrial displays. These displays are widely used in intelligent manufacturing control panels, logistics scheduling terminals, outdoor self-service equipment, and industrial monitoring systems, requiring stable performance in harsh industrial environments.

Core requirements aligned with industrial application scenarios included:

Structural protection: IP65 waterproof and dustproof rating to resist industrial dust, water splashes, and oil stains;
Precision fit: Dimensional tolerance ≤±0.2mm to match touch screen modules, circuit boards, and heat sinks of 19-32 inch specifications;
Heat dissipation performance: Effectively reduce display operating temperature by 8-10℃ to avoid overheating and screen failure;
Anti-interference capability: EMC shielding effectiveness ≥40dB to resist industrial electromagnetic interference (EMI);
Durability: Impact resistance (IK08 rating) and scratch-resistant surface to withstand industrial on-site collisions and friction;
Installation versatility: Compatible with wall-mounted, embedded, and stand-mounted installation for different industrial scenarios;
Aesthetic & consistency: Matte gray/black finish with color difference ΔE ≤1, and seamless edge transition to ensure brand uniformity.

Sanjun Hardware was selected for its proven experience in high-precision industrial sheet metal customization, mature EMC shielding and heat dissipation technology, and ability to balance structural robustness with precise component fitting—critical for industrial displays that demand reliability and stability.

Manufacturing Process of Core Sheet Metal Components for Industrial Touch Displays

Sanjun integrated industrial-grade performance requirements into every production link, focusing on four core components: main enclosure (19-32 inch adaptive), heat-dissipating back panel, touch screen bezel, and EMC shielding frame. The production process strictly followed industrial quality standards to ensure product stability in harsh environments.

1. Material Selection & Pre-treatment

Main Enclosure: 1.5mm SPCC cold-rolled steel with electrostatic powder coating—high structural strength, impact resistance, and cost-effectiveness for industrial scenarios;
Heat-Dissipating Back Panel: 1.2mm 6061-T6 aluminum alloy—excellent thermal conductivity, accelerating heat transfer from the display module;
Touch Screen Bezel: 1.0mm 304 stainless steel with anti-fingerprint coating—scratch-resistant, easy to clean, and compatible with touch operation;
EMC Shielding Frame: 0.8mm galvanized steel with conductive nickel plating—enhances electromagnetic shielding performance to protect internal components;
Pre-treatment: Automated degreasing + phosphating + passivation—removes surface impurities, improves coating adhesion, and enhances corrosion resistance for long-term industrial use.

2. Core Manufacturing Craftsmanship

Precision Laser Cutting: 4000W fiber laser cutting machine (±0.05mm tolerance)—processes adaptive enclosures for 19-32 inch displays, including precision holes for interfaces, heat-dissipating slots, and mounting brackets. Dust collection equipment ensures surface cleanliness to avoid affecting component fitting;
CNC Bending & Forming: 8-axis AMADA CNC bending machine with custom 3D jigs—forms enclosure contours and bezel structures. Springback is controlled within ≤0.1mm via parameter optimization, ensuring tight fit with display modules;
Laser Welding & Sealing: 1500W fiber laser welding with argon protection—joins enclosure seams with weld width ≤1mm, minimizing thermal deformation. Waterproof gaskets (EPDM material) are installed at joints to achieve IP65 protection;
Heat Dissipation Structure Optimization: The back panel is processed with 30° slanted heat-dissipating slots and integrated aluminum heat sinks, improving heat dissipation efficiency by 25% without compromising dustproof performance;
Surface Treatment:
- Main Enclosure: Electrostatic powder coating (60μm thickness)—9H hardness, scratch-resistant, and IP65-rated waterproof after treatment;
- Touch Bezel: Brushed finish + anti-fingerprint coating—ensures smooth touch operation and avoids fingerprint residue;
- Shielding Frame: Conductive nickel plating (8μm thickness)—enhances EMC shielding effectiveness to meet industrial anti-interference requirements;
- Post-treatment: Edge deburring, polishing, and corner rounding (R2mm)—avoids sharp edges and ensures safe installation.

3. Quality Control & Testing

Dimensional & Fit Testing: Coordinate Measuring Machine (CMM) and 3D scanning—100% inspection of enclosure dimensions and fitting accuracy with 19-32 inch display modules, ensuring no gaps;
Environmental & Protection Testing: IP65 waterproof and dustproof test (high-pressure water spray + dust injection); IK08 impact resistance test; 72-hour high-temperature (60℃) and low-temperature (-20℃) cycling test;
Functional Testing: EMC testing (conforming to IEC 61000 standard); heat dissipation test (simulating 24-hour continuous operation, display temperature controlled within 45℃);
Aesthetic & Consistency Inspection: Color difference detection (ΔE ≤1); visual inspection of surface finish and weld seams; 100% leak test for waterproof performance.

Project Challenges & Sanjun’s Solutions

1. Challenge: Balancing IP65 Protection with Heat Dissipation

IP65-level sealing would block heat emission, while excessive heat-dissipating slots would reduce dustproof and waterproof performance, leading to display overheating or component damage.

Solution: Optimized the heat dissipation structure—adopted slanted 30° heat-dissipating slots (hidden on the back and sides) and integrated aluminum heat sinks. EPDM waterproof gaskets were installed around the slots to prevent dust and water ingress. The final product achieved both IP65 protection and efficient heat dissipation, with display operating temperature controlled within a safe range.

2. Challenge: Precision Fit for 19-32 Inch Multi-Specification Displays

Different display sizes (19/22/27/32 inch) required adaptive enclosures with strict dimensional consistency, and manual processing was prone to deviation, affecting module fitting.

Solution: Adopted automated production lines with parameterized programming—laser cutting and CNC bending parameters were preset for each display size, reducing manual operation errors. A dedicated fit-testing station was established to verify fitting accuracy with corresponding display modules for each unit. The final dimensional tolerance of all enclosures was controlled within ±0.15mm, ensuring seamless fit for multi-specification displays.

3. Challenge: Industrial-Grade EMC Shielding Performance

Industrial environments have strong electromagnetic interference, which could disrupt display signal transmission and touch sensitivity, affecting normal operation.

Solution: Optimized the shielding structure—added a full-surface conductive shielding frame inside the enclosure, and used conductive gaskets at the bezel and interface joints to eliminate electromagnetic leakage. Conducted multiple EMC simulation tests during R&D to adjust the shielding layer thickness and structure. The final product’s EMC shielding effectiveness reached ≥45dB, exceeding industrial anti-interference requirements.

4. Challenge: Consistency of Surface Finish for Large-Batch Production

1,800 sets of enclosures required uniform surface color and finish, and large-batch powder coating was prone to color difference and surface defects (e.g., bubbles, particles).

Solution: Used automated electrostatic spraying equipment and unified powder batches. Established a pre-spray inspection system for raw materials and a post-spray color difference detection system (100% inspection for the first 15 units of each batch, 5% random inspection for subsequent units). The final color difference of all products was controlled within ΔE ≤0.8, and surface defect rate was 0.

Project Outcomes

Delivery Performance: 1,800 sets of sheet metal enclosures for 19-32 inch touch industrial displays were delivered 4 days ahead of the 35-day deadline, with a 100% pass rate in pre-delivery inspection;
Field Application Feedback: After 10 months of use in 400+ industrial sites (factories, logistics hubs, outdoor terminals), the enclosures showed 0 cases of water ingress, dust accumulation, overheating, or EMI failure. The client reported that the enclosures effectively guaranteed stable display operation in harsh environments;
Long-Term Cooperation: The industrial display manufacturer signed a 3-year strategic cooperation agreement with Sanjun Hardware, entrusting it with sheet metal customization for 5 new series of 15-43 inch industrial touch displays. The client recognized Sanjun’s “professional grasp of industrial display needs and reliable product quality” as the core cooperation driver.

Contact Info