Automotive Side Mirror Housing and Base Assembly

This assembly comprises a high-gloss black protective cover, a white internal bracket, a flat reflective mirror glass, and an LED turn signal lamp, forming the core aesthetic and functional module of the vehicle's exterior side mirror system. The black housing features a streamlined, large-curvature design that must closely conform to the vehicle's body waistline. The white component serves as the internal load-bearing structure, featuring reserved snap-fit clips and screw boss positions for securing the mirror adjustment mechanism and electronic components. The transparent lens at the bottom incorporates a light-guiding prism structure to provide clear lateral turn signal warnings.

The manufacturing challenge for Class A surfaces lies in eliminating injection molding sink marks, weld lines, and flow marks to ensure mirror-level smoothness and consistent gloss on the painted surface. The black high-gloss shell is highly sensitive to mold polishing precision and injection molding process parameters (such as holding pressure and mold temperature control); even minor surface imperfections are amplified under lighting. Furthermore, the assembly gap between the mirror glass and the housing must be controlled within micron-level tolerances to prevent wind noise during driving and ensure waterproof sealing performance, imposing stringent requirements on dimensional stability.

Leveraging our in-house closed-loop production capabilities for injection molding and painting surface treatment, we achieve one-stop delivery from raw material modification and precision injection molding to primer, basecoat, and clear coat application. The production site is equipped with Haitian and LK injection molding machines, along with inspection equipment such as BYK color spectrophotometers and Coordinate Measuring Machines (CMM). This allows for strict control over batch color consistency (Delta E values) and dimensional tolerances at key mounting points. Compliant with the IATF 16949 quality management system standards, we meet the dual acceptance criteria for automotive-grade components regarding both aesthetic quality and functional reliability.