3C Product Surface Spraying Solution
High-Precision Intelligent Surface Spraying Solution for 3C Electronic Products — integrating robotic electrostatic bell, precision reciprocator, and floor track conveyor technologies with AI visual inspection for industry-leading yield rates.
Solution Overview
Comprehensive surface treatment system addressing refined aesthetics, functional integration, and green manufacturing for 3C products.
Targeting the three major sectors of Computers, Communication, and Consumer Electronics, this solution addresses the industry trends of "refined aesthetics, functional integration, and green manufacturing." It integrates precision spraying equipment, functional coating materials, intelligent environmental controls, and full-process quality traceability into a comprehensive surface treatment system.
The solution focuses on overcoming three core pain points in 3C product spraying:
Uncontrolled Appearance Defects
Leveraging Class 10,000 cleanroom spraying environments and AI visual inspection technology to effectively eliminate defects such as particles, orange peel, and sagging.
Insufficient Functional Performance
Integrating multi-functional coating systems—including Anti-Fingerprint (AF), antibacterial, and scratch-resistant properties—to precisely match end-users' demands for tactile feel and durability.
Environmental Compliance Pressure
Equipped with high-efficiency VOCs treatment systems that significantly outperform national standards, providing robust support for enterprise environmental impact assessments (EIAs).
Currently, this solution is maturely applied in the mass production of high-end 3C product housings, such as smartphones, laptops, and smart wearables. It achieves industry-leading benchmarks: a yield rate of no less than 98.5%, a coating utilization rate exceeding 85%, and changeover times controlled within 15 minutes.
Spraying Methods & Equipment Showcase
Three core spraying technologies available for flexible configuration based on 3C product geometry and production requirements.
Common Spraying Methods & Application Scenarios
Flexibly combined technologies addressing "small batches, high variety, and high precision" production requirements.
Robotic Electrostatic Bell Spraying
As the current mainstream spraying method, this technology atomizes paint via a high-speed rotating bell (20,000–30,000 rpm) while applying a high-voltage electrostatic field. The charged paint mist is efficiently adsorbed onto the grounded workpiece surface. With a material transfer efficiency of 80%–90% and excellent coating uniformity (film thickness deviation within a minimal range), it is particularly suited for the high-precision mass production of complex curved surfaces such as smartphone mid-frames and earphone casings.
Precision Reciprocator Spraying
This method utilizes spray guns moving linearly along axes combined with workpiece rotation to achieve uniform coverage on flat or regularly curved surfaces. Featuring lower capital investment and ease of maintenance, it is the ideal choice for large flat components like laptop lids (A-side), tablet backshells, keyboard panels, and router housings.
Floor Track Conveyor Line Spraying
Here, the spraying robot moves in precise synchronization with the conveyor line (speed matching accuracy ±1 mm/s), completing the spraying process while the workpiece remains in motion, eliminating the need for stops. This continuous mode significantly increases line throughput, making it especially suitable for the high-speed mass production of small components such as TWS earphone charging cases, compact smart speakers, and electric toothbrushes.
Applicable Product Categories
Comprehensively covering core 3C categories across diverse geometries and materials.
Computer Category
Typical Products: Laptop housings (A/C/D panels), desktop computer chassis, keyboards, tablet backshells.
Spraying Focus: Overall housing, key legends, areas surrounding heat vents.
Core Requirements: Wear resistance for key legends, anti-fingerprint properties for touchpads, and high color consistency across the entire housing.
Communication Category
Typical Products: Smartphones (mid-frame/back cover), smartwatch/fitness band cases, 5G base station antenna covers, router housings.
Spraying Focus: Mid-frame R-corners, camera decorative rings, strap interfaces.
Core Requirements: High hardness to prevent drop-induced scratches, good signal permeability in antenna areas, and premium metallic texture for titanium/aluminum alloy mid-frames.
Consumer Electronics Category
Typical Products: TWS earphone charging cases, drone airframes, VR/AR goggle frames, robotic vacuum cleaner panels, digital camera housings.
Spraying Focus: Curved housings, seam areas, functional buttons.
Core Requirements: Controllable matte or glossy finishes, sweat corrosion resistance for wearable devices, and lightweight adaptation for drone components.
Technical Extension: Composite Spraying Processes
"Spray+" composite process routes for special aesthetic effects in high-end 3C products.
PVD + Spraying
A dense metallic luster layer is first formed on the substrate via Physical Vapor Deposition (PVD), followed by the spraying of a transparent UV topcoat for protection. This perfectly balances metallic aesthetics with surface hardness and is widely used in flagship smartphone titanium alloy mid-frames.
Laser Etching + Spraying
After applying a base color coat, laser etching technology is utilized to precisely expose the underlying substrate texture. Finally, a transparent protective layer is sprayed to set the effect. This creates highly dimensional, textured finishes commonly seen on the A-side decor of premium laptops.
Nano-Spraying
Utilizing functional coatings with particle sizes not exceeding 50 nm, electrostatic spraying forms an ultra-thin film (0.5–1 μm thick). This imparts superior functionalities such as anti-fingerprint and antibacterial properties to the product surface, significantly enhancing the user experience.