Motorcycle Headlight Lens Injection Mold

Core Advantages

• Optical-grade Transparency: The mold cavity undergoes high-speed, high-gloss polishing, achieving a surface roughness Ra of less than 0.012μm, ensuring that the PC material is molded without flow marks or haze, meeting optical transmittance standards.
• Precision Optical Surface Replication: Based on customer-provided optical digital models, high-precision CNC machining and EDM technology are used to accurately replicate the Fresnel pattern or light distribution texture of the lens surface.
• Internal Stress Control Technology: Optimizes gate location and filling speed through mold flow analysis, combined with sequential valve gate control, to minimize internal stress and prevent stress whitening or cracking.
• Mold Thermal Balance Design: Designed for the high-temperature molding characteristics of PC material, an efficient heating/cooling circuit ensures uniform mold temperature and reduces uneven shrinkage and birefringence caused by temperature changes.

Product Features

• MirrorPolished Cavities: Cavities and cores are made of highquality mold steel (e.g., S136 or 2403), undergoing vacuum heat treatment and cryogenic treatment, followed by mirror polishing to ensure a transparent and flawless part surface.
• Precision Optical Inserts: The light distribution area uses a replaceable optical insert structure for easy optical adjustment and maintenance. Insert machining accuracy is controlled within ±0.005mm.
• Hot Runner System: Equipped with a valvetype gate hot runner system, allowing for sequential valve control, eliminating weld lines and ensuring a flawless optical surface.
• Venting System Design: Precision venting channels are incorporated at the edges of the optical surface and in the final filling area to prevent fogging or short shots caused by gas stagnation.
• Ejection System Protection: A large ejector plate and multipoint ejection design, combined with ejection speed control, prevent ejection marks or scratches during the ejection of transparent parts.

Applications

This mold is primarily used in motorcycle lighting systems to produce transparent headlight lenses for various gasoline-powered and electric motorcycles. Suitable for street bikes, sports bikes, cruisers, adventure bikes, and scooters, it supplies motorcycle OEMs and Tier 1 lighting system suppliers.

Common Problems and Solutions

• Problem: Flow marks or ripples appear on the lens surface.
• Solutions: Increase mold and melt temperature; optimize gate location and size; adjust injection speed using a multisegment injection profile.
• Problem: Bubbles or black spots appear inside the lens.
• Solutions: Check material dryness (PC material needs to be dried to a moisture content below 0.02%); remove material buildup in the barrel and hot runner system; increase back pressure.
• Problem: Scratches or ejector pin marks appear on the lens surface during ejection.
• Solution: Optimize draft angle and ejector pin position; increase ejection area or use an ejector plate; spray a release agent on the cavity surface (verify its impact on light transmittance).
• Problem: Stress birefringence occurs in the optical area.
• Solution: Optimize filling and holding pressure curves through mold flow analysis; reduce clamping force and holding pressure; optimize the cooling system design to achieve uniform cooling.

Important Considerations:

• Before mold design, provide complete 3D optical data for the automotive headlight lens, clearly defining the optical surface area, light distribution requirements, and appearance standards.
• Accurately specify the PC material grade and additives (e.g., UV stabilizers) to set shrinkage and determine process parameters.
• During mold storage and transportation, the cavity surface should be rustproofed and covered with a protective film; avoid contact with the optical surface.
• Regularly check the temperature control accuracy of the hot runner system and the valve gate sequence to ensure the stability of the optical surface molding.
• Transparent parts production needs to be carried out in a clean environment (Class 10,000 cleanroom or higher is recommended) to prevent dust contamination from causing appearance defects.

Q: 10. If I want to develop a product containing injection-molded parts, what kind of assistance can you provide?

We can provide full support ranging from product development review and structural design, to mold manufacturing, volume injection molding, printing, and assembly. We can collaborate with customers in the early stages of product development to optimize designs for cost reduction and improved manufacturability.

Q: 9.What is the company's quality policy?

The company always adheres to the quality policy of "Precision, High Efficiency, Forging Quality," and is committed to providing customers with high-quality services through advanced technology and an excellent management team.

Q: 8.What are your competitive advantages compared to other mold enterprises?

Our advantages lie in the combination of Singapore's precision mold technology, advanced production equipment (extensive imported CNC and injection molding machines), a comprehensive one-stop production process (from design to assembly), and a strict quality management system certified by IATF 16949.

Q: 7.Who are your main customers, and to which regions are the products exported?

We have established good cooperative relations with well-known companies, including UK's Land Rover and Triumph Motorcycles, domestic SAIC, Changan, ABB charging stations, and Japan's Tiger Corporation. Our products are exported to countries such as Japan, Europe, and the United States.