Automotive tail lamp parts are no longer only decorative covers. In many vehicle designs, the tail lamp trim needs to support light transmission, light shielding, exterior appearance, positioning, and assembly stability at the same time. If the transparent section and black structural section are produced separately, visible seams, assembly gaps, color inconsistency, and extra handling steps can appear quickly.

For this dual PC automotive tail lamp component, Maifeng Precision focuses on a two-color molding approach. The transparent PC area supports light transmission and light pattern display, while the opaque PC area provides structural support and helps block stray light. The goal is to reduce secondary assembly and make the part easier to control in production.

Why Two-Color PC Molding Matters for Tail Lamp Parts

Traditional split production often requires separate molding, bonding, clipping, or other secondary assembly steps. These steps can create visible transitions and add variation between parts. For exterior lamp components, that variation may affect both appearance and downstream assembly efficiency.

Two-color injection molding can form the transparent and opaque PC zones in one coordinated molding process. This does not remove the need for careful mold design, but it helps reduce part count, simplify assembly, and improve the consistency of the transition between functional light areas and black structural trim.

Transparent PC and Opaque PC Functional Zones

The transparent PC section is used for light transmission and light pattern display. For lamp designs that require a clean illuminated appearance, the transparent area must be protected from scratches, flow marks, haze, or contamination during molding and handling.

The opaque PC section functions as the structural support and light-shielding area. It can integrate clips, positioning features, and curved support surfaces so the part contributes to lamp assembly rather than acting only as a decorative cover.

Mold and Injection Molding Control Points

Tail lamp plastic parts usually include long curved surfaces, glossy visible areas, positioning tabs, and local light-transmission features. These details make mold planning important before machining. Gate location, material flow, cooling balance, parting line position, ejection, and handling of high-gloss surfaces all affect the final part.

Maifeng reviews the product structure and customer drawings before tooling so the mold concept can match the appearance and assembly requirements. For two-color PC parts, the relationship between the first-shot and second-shot material zones also needs to be considered early, especially around the boundary between transparent and opaque areas.

Production Video

The video below shows the automotive lamp plastic part presentation material supplied for this solution. The original video was converted to H.264 MP4 for stable browser playback.

What Buyers Should Confirm Before Tooling

1. Transparent PC area shape, light-transmission requirement, and visible surface standard.
2. Opaque PC color, light-shielding requirement, and structural load or clip function.
3. Boundary position between the two material zones and acceptable transition appearance.
4. Mounting tabs, locating features, and assembly tolerance requirements.
5. Surface finish, gloss level, packaging method, and protection during shipment.
6. Prototype quantity, trial molding schedule, and expected mass production volume.

Maifeng’s Solution for Automotive Lamp Plastic Components

Maifeng Precision supports customers with product structure review, mold design, mold manufacturing, two-color injection molding, and production follow-up. For automotive tail lamp parts, our work focuses on manufacturable structure, stable material transition, controlled visible surfaces, and practical support for customer assembly needs.

If you are developing tail lamp trims, lamp housings, light guide-related plastic parts, or other automotive exterior plastic components, you can send drawings, samples, material requirements, and target production volume. Our team can review the project and provide a custom mold and injection molding solution.

Contact Us
📩 Email: Lucie-MF@mold-std.com  |  📱 WhatsApp: +86 17714886855

Company Profile

About Us

Kunshan Maifeng Precision Industry Co., Ltd. (MIF) has an investment of RMB 35 million and an independent factory of more than 5,000 m2. Our manufacturing resources include 36 single- and dual-color injection molding machines from 90 to 700 tons and more than 50 sets of mold manufacturing and processing equipment. Supported by a service, management and production team of over 100 people, we provide product design, mold design and manufacturing, injection molding, and product assembly. Our parent company was established in 2008.

1. Product Design
Product structure design and optimization based on customer drawings and samples.

2. Mold Design
Mold concepts developed around product requirements, material and production needs.

3. Mold Manufacturing
Machining, polishing, assembly and related processes for custom molds.

4. Injection Molding
Single- and dual-color molding capabilities for custom production.

5. Product Assembly