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Mirror-Steel Clear Part Mold

This mirror-steel clear part mold is a special precision mold designed for transparent injection molded parts with high light transmittance and high appearance requirements. Made of high-polishing performance mirror mold steel, processed via multi-axis CNC machining, precision assembly and ultra-mirror polishing, it enables forming of clear parts without flow marks, air bubbles and with high gloss. Widely used in the production of transparent components in optical, medical, consumer electronics and other industries.

Quick Info:
  • Machining Process: Multi-axis CNC machining, EDM, ultra-mirror polishing, precision assembly
  • Material: S136 Mirror Mold Steel (NAK80/STAVAX optional)
  • Accuracy: ±0.005 mm
  • Surface Finish: Ultra-mirror polish (Ra≤0.02μm)
  • Applicable Materials: PC, PMMA, COC and other transparent engineering plastics
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We specialize in custom manufacturing of high-precision clear part molds, equipped with 5-axis machining centers, wire-cut EDM, mirror spark machines and ultra-mirror polishing equipment, with over ten years of experience in clear part mold development. The key dimensional tolerance of the mold is stably controlled within ±0.005 mm, with a monthly delivery capacity of 15+ high-precision clear part molds. We provide one-stop services from product structure optimization, mold design, manufacturing to trial molding and delivery, serving customers in optical, medical, consumer electronics and other industries.

Technological Process

  1. Product & Mold Design: Optimize gate, venting and cooling solutions based on clear part structure, complete 3D mold design and 2D machining drawings.
  2. Steel Cutting & Rough Machining: Cut S136 mirror steel to size and perform rough milling to remove most of the excess material.
  3. Semi-finishing & Heat Treatment: Semi-finish the mold components and perform quenching treatment to stabilize S136 hardness at HRC48-52, improving wear resistance and polishing performance.
  4. Precision Machining: Multi-axis CNC finish the cavity and inserts; wire-cut EDM process holes; EDM finish sharp corners and ribs.
  5. Ultra-Mirror Polishing: Perform multi-step polishing on the cavity to optical standards, achieving Ra≤0.02μm mirror finish to eliminate flow marks and defects.
  6. Mold Assembly & Trial Molding: Complete mold assembly, conduct multiple trial moldings and adjustments to ensure light transmittance, appearance and dimensions of clear parts meet requirements before delivery.

Core Advantages & Applications

High Light Transmittance Forming: Ultra-mirror polished cavity combined with optimized gate and venting design enables clear forming of PC/PMMA materials without flow marks or air bubbles.
Excellent Polishing Performance: S136 mirror steel has good polishability and corrosion resistance, maintaining mirror finish for long-term use with high consistency in clear part appearance.
High Precision & Stability: Precision processing technology ensures mold dimensional accuracy, no deformation during long-term production, and stable optical performance of clear parts.
Long Life Design: S136 steel has high hardness and wear resistance, with reasonable cooling and venting design, mold life can exceed 1,000,000 cycles.
One-stop Custom Service: Support full-process services including product structure optimization, mold design, manufacturing and trial molding adjustment to reduce customer development costs.

Common Applications

  • Optical Industry: Molds for lenses, prisms, light guides and other optical transparent parts
  • Medical Industry: Molds for syringes, infusion sets and transparent consumable housings
  • Consumer Electronics: Molds for mobile phone lens protectors, home appliance transparent panels and LED lampshades
  • Industrial Products: Molds for transparent windows, protective covers and sensor housings

Specification Table

ParameterDetails
MaterialS136 Mirror Mold Steel (Standard HRC48-52, NAK80/STAVAX optional)
Machining ProcessMulti-axis CNC machining, wire-cut EDM, EDM, ultra-mirror polishing, precision assembly
Dimensional Accuracy±0.005 mm
Surface FinishUltra-mirror polish (Ra≤0.02μm), optical-grade defect-free
Applicable Transparent MaterialsPC, PMMA, COC, PS, etc.
Mold LifeOver 1,000,000 cycles (customizable as required)
Applicable Injection Machine TonnageCustom per mold size (Typical 50T-300T)
Gate & Venting SystemCustom hot runner/cold runner gate per clear part structure, optimized venting design
Quality ControlCMM dimensional inspection, roughness inspection, trial molding light transmittance verification, full product dimension report delivery

CASE LIST

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