The Role of Car Rearview Mirrors in Daily Life and Recommendations from a Rearview Mirror Mold Manufacturing Factory

I. Core Functions of Car Rearview Mirrors

1. Basic Functions

• Rear Visibility Expansion: Utilizes curved mirror designs (flat, convex, or dual-curvature mirrors) to widen the field of view and minimize blind spots.

• Anti-Glare Function: High-end models feature auto-dimming mirrors that use electrochromic technology to reduce glare from headlights at night.

• Environmental Adaptability: Includes heating (defogging/defrosting), auto-folding (to prevent damage in tight spaces), and more.

II. Manufacturing Recommendations from a Mold Factory

1. Material Selection

• Housing Mold: Recommended materials include PBT+GF30 (heat-resistant, impact-resistant) or ABS (cost-effective option), with mold shrinkage allowance (typically 1.5-2.5%).

• Mirror Lens Mold: Optical-grade polycarbonate (PC) or silver-coated glass, with high-precision polishing (Ra ≤ 0.05μm) to prevent image distortion.

2. Key Mold Design Considerations

• Parting Line Placement: Avoid visible surfaces (e.g., housing seams); position in concealed areas (e.g., bottom or door-facing side).

• Ejection System: For lens molds, use air ejection + electrostatic adsorption to prevent optical surface scratches.

• Cooling Channels: Ensure uniform cooling (±2°C tolerance) for housing molds to prevent sink marks affecting strength.

3. Production Optimization

• Housing: Use In-Mold Decoration (IMD) to integrate textures/logos directly, reducing secondary processing.

• Lens: Ultrasonic cleaning of molds before coating to avoid impurities causing silver layer peeling.