Detailed Introduction

This multi-cavity injection mold is professionally developed for miniature transparent optical connector parts molded by high-temperature PPO and PET special plastics, targeted to the high melting point, high shrinkage and easy-to-fog material characteristics of PPO/PET. It strictly controls mold temperature difference to guarantee consistent light transmittance and dimensional stability of finished optical connectors.

The mold adopts split fixed mold half and moving mold half structure, with dual symmetrical multi-row cavity zones to raise single-cycle output. Each tiny optical connector cavity is an independent embedded insert, convenient for disassembly, replacement and deep cleaning to avoid PPO/PET plastic residue accumulating and damaging the optical surface of products. All molding surfaces go through multi-stage optical mirror polishing, completely eliminating micro scratches, flow lines and fogging defects easily generated during PPO/PET injection molding, no secondary trimming or polishing required after molding.

Independent distributed cooling pipelines are arranged for every single cavity, which accurately balance mold temperature during high-temperature PPO/PET injection, greatly inhibit internal stress, part warpage and uneven shrinkage unique to PPO/PET. Built-in precision slide locking blocks maintain stable clamping force under long continuous high-temperature production, prevent thin-wall connector flash and burrs, and extend mold service life under long-term PPO/PET high-temperature processing.

Complete Precision Machining Workflow

1. 5-axis CNC rough milling for mold base outline and cavity rough forming
2. Vacuum stress relief heat treatment to stabilize steel hardness, reduce thermal deformation under long-term PPO/PET high-temperature molding
3. Precision surface grinding to control mold plate flatness and parallelism within ±0.002mm
4. Sinker EDM & wire cut WEDM for ultra-fine thin-wall contour of miniature PPO/PET optical connectors
5. Optical-grade multi-step mirror polishing, matched with PPO/PET fluidity to optimize cavity surface finish
6. Optional non-toxic anti-corrosion surface coating compatible with PPO and PET high-temperature engineering plastics

All mold core, cavity and structural components complete full 3D coordinate measurement inspection to meet strict optical component drawing tolerance standards. Full customization is supported based on customer PPO/PET connector samples or engineering drawings: cavity quantity, mold steel grade, cooling channel layout and polishing grade can be adjusted according to PPO/PET material ratio, optical performance requirements and daily production capacity. The symmetrical multi-cavity layout significantly improves molding efficiency while unifying the transparency and dimensional consistency of PPO/PET optical connector fittings.

Specification Table