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Views: 0 Author: Site Editor Publish Time: 2025-08-23 Origin: Site
As a trusted automotive injection mold manufacturer, we specialize in creating high-precision tooling solutions for car headlights. This guide highlights the essential strategies for designing a reliable, high-performance automotive headlight injection mold—from hot runner systems to venting configurations.
Most car headlight molds use an integrated A/B plate structure. This approach enhances strength, reduces overall volume, and supports efficient CNC machining.
Avoid thin steel and sharp corners along parting lines
Use draft angles greater than 7° to reduce wear
Ensure sealing surfaces to prevent flash
Use high-speed CNC for optical-quality surfaces
A two-point open hot runner system ensures fast, balanced flow into non-visible areas.
Gate into hidden areas to preserve appearance
Cool hot nozzle zones to prevent stringing
Use R-corners in wiring grooves
Mechanical side core pulls using sliders and angled pins help release undercuts safely and reliably.
Prioritize mechanical over hydraulic
Use standard sliders before complex alternatives
Design for simple pull directions
Grid-style cooling channels and vertical waterlines support dimensional stability and faster cycles.
Cover at least 60% of cavity area
Maintain 15–25mm from cavity surface
Use separate hot runner cooling circuits
"Three-level alignment systems reduce mismatch, flash, and mold wear."
Primary: Guide pins & bushings
Secondary: Mold base locks
Tertiary: Insert lips for cavity accuracy
A reliable ejection system ensures clean part release without defects or warpage.
Use ejector pins, sleeves, and return springs
Add anti-rotation to non-round pins
Use pre-return for safer mold closure
Ensure mold longevity under pressure with smart reinforcement strategies.
Use large-diameter guide pillars
Reinforce with pressure blocks
Include air relief regions to ease machining
Proper venting reduces gas buildup and burn marks.
Place vents at flow ends and tight corners
CNC-cut parting line vents for consistency
Add vents near thin or ribbed sections
Prevent part sticking with these practical techniques:
Use draft angles > 5°
Add micro-undercuts or surface texture
Apply reverse ribs to assist release
Designing automotive headlight molds demands precision, planning, and expertise. From gating and cooling to ejection and alignment, every detail matters in delivering reliable tooling for mass production.
