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Injection-Molded Automotive Warning Light Guide

White UV-stabilized PC automotive warning-light guide produced by injection molding and deburring, with four precision bores, strict optical-surface requirements, and residual-stress controls.

Category:

Polyurethane Casting

key word:

Injection Molding

Automotive Lighting

Automotive Components

jake@gdfengnuo.com

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Product Description

Product Information

Manufacturing Process	Injection molding
Part Type	Automotive warning-light guide, left-hand side
Material	White UV-stabilized polycarbonate (PC)
Post-Processing	Deburring
Structural Features	Four closely spaced light-guide bores, stepped internal profiles, and a small locating feature
Application Field	Automotive warning-light assemblies

Product Overview

This left-hand automotive warning-light guide is injection molded in white, UV-stabilized PC and deburred after molding. Four closely spaced bores and a small locating feature form a compact component whose fit and visible surfaces both matter in the final assembly.

Structure and Molding Features

The four bores have stepped internal geometry and sit close to one another. The narrow material between adjacent openings leaves limited room for the corresponding mold cores. A small locating feature provides an additional geometry point to protect during molding, ejection, deburring, and handling.

Molding Challenges and Control Strategy

Selected small-bore dimensions carry a ±0.05 mm drawing tolerance, making core alignment and dimensional consistency important. The control plan should stabilize core location and monitor cavity-to-cavity variation rather than relying on final inspection alone. PC molding conditions, packing, cooling, and ejection should be managed to limit residual stress that could contribute to later cracking or aging-related defects. Gate and venting design, together with careful handling, should also be evaluated against the requirement for clean white optical surfaces.

Quality Control Focus

Check the drawing's ±0.05 mm bore callouts and the relative position of all four openings. Inspect the locating feature and deburred edges for damage. Visible surfaces should be reviewed for weld lines, scratches, sink marks, and contamination, with particular attention to the appearance requirements of a white light-guide component.

Project Value

The useful outcome is a repeatable light-guide part that fits its mating assembly and maintains a clean visible appearance. Defining core-position, residual-stress, bore-size, and surface-acceptance checks up front gives engineering and purchasing teams concrete criteria for sampling, supplier review, and repeat orders.

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