Automotive switch panels may look simple on the surface, but each one goes through a highly precise and complex manufacturing process. From plastic molding to circuit assembly, every step determines the quality and reliability of the final product. In this article, we take you inside a modern switch-panel factory to show how professional components are created.
1. Injection Molding: Building the Structure
Every switch panel begins with high-precision plastic components.
Using advanced injection molding machines, molten plastic is injected into steel molds to form the housing, keys, and internal brackets.
Key quality factors:
- Mold accuracy
- Material purity
- Surface flatness and structural strength
2. Spray Coating: Enhancing Texture and Appearance
To achieve a premium automotive interior finish, many panels undergo a spray-coating process. This includes:
- Matte coating
- Gloss coating
- Soft-touch paint
- UV-resistant finishing
The coating improves durability, scratch resistance, and overall aesthetics.
3. Silk Screen Printing: Icon and Symbol Customization
Most automotive switches require icon printing for lights, windows, doors, and AC functions.
Silk screen printing ensures:
- High-precision graphics
- Strong color adhesion
- Long-lasting durability without fading
4. SMT & DIP Workshops: Creating the Electronic Core
Modern automotive switch panels often integrate electronic controls.
Inside the SMT (Surface Mount Technology) workshop, tiny components—resistors, ICs, LEDs—are placed onto the PCB with micron-level accuracy.
Larger components are assembled in the DIP workshop using wave-soldering technology.
5. Assembly & Testing: Ensuring Reliability
Finally, all components are assembled into a complete switch panel. Testing includes:
- LED brightness
- Tactile button feedback
- Electrical function
- Communication protocol (CAN, LIN, etc.)
- Durability testing (tens of thousands of clicks)
A quality switch panel must pass all tests before packaging.
Conclusion
From appearance to internal circuitry, automotive switch panels require strict control at every stage. With advanced equipment and professional workshops, Nuobei delivers reliable, OEM-grade switch panels for global customers.
