Bicycle Spoke Reflector Mold

 Manufacturing Process of Reflector Molds

(1) Material Selection

• Mold Base: Pre-hardened steel (e.g., P20, 718) or aluminum for prototyping.

• Cavity/Insert Material: High-polish stainless steel (e.g., S136) or hardened tool steel (e.g., H13) for wear resistance.

• Reflector Material: Typically PMMA (acrylic) or polycarbonate (PC) for optical clarity and weatherability.

(2) Mold Design Key Points

• Micro-Pattern Engraving: Laser/CNC machining to create retroreflective structures (e.g., corner cube arrays).

• Venting System: Prevents air traps in thin-walled reflector sections.

• Cooling Channels: Ensures uniform cooling to avoid warping.

(3) Production Process

1. CNC Machining: Roughing and finishing of mold cores/cavities.

2. EDM (Electrical Discharge Machining): For intricate micro-patterns.

3. Polishing: Mirror finish (Ra ≤ 0.01μm) to ensure light reflection efficiency.

4. Assembly & Testing: Trial runs with optical validation (e.g., reflectivity testing).

(4) Injection Molding

• Process Parameters:

  • Melt Temp: 220–260°C (PMMA) / 280–320°C (PC)

  • Injection Pressure: 80–120 MPa

  • Cycle Time: 15–30 seconds (varies with size)

•       Post-Processing:

  • Coating (optional): UV-protective or anti-scratch layers.

  • Quality Control: Inspect for bubbles, streaks, or distortion.

3D drawing of bike reflector reflex mould:

Where to use bicycle spoke reflector mold:

Bicycle spoke reflector mold pictures: