Detailed Introduction

This precision multi-cavity injection mold is specially developed for full-series new energy vehicle high-voltage connector plastic parts, fully optimized for flame-retardant reinforced PPO/PET engineering plastics, meeting new energy vehicle electrical standards of heat resistance, insulation, aging resistance and high mechanical strength.

The mold adopts standard two-plate fixed-moving mold structure, supports single/multi-cavity modular customization for high-voltage plug housings, terminal positioning blocks, locking latches, guide frames and bus bar plastic supports shown in the picture. Each functional component cavity is an independent embedded insert, which can be quickly replaced to switch different connector models, reducing mold development cost for multi-product production lines. All molding surfaces adopt uniform automotive texture etching, effectively covering micro flow marks and gloss unevenness easily generated during PPO/PET injection, eliminating secondary surface finishing process.

Independent distributed cooling pipelines are laid out for every cavity, which accurately balance mold temperature under long-term high-temperature PPO/PET injection, greatly suppress internal stress, part warpage and uneven shrinkage unique to PPO/PET reinforced material. Multi-direction slide side core pulling mechanism is integrated to form complex deep cavity, buckle lock and terminal positioning slot structures in one molding cycle. Precision interlock slide locking blocks ensure stable clamping force during continuous high-temperature production, prevent thin-wall plastic flash and burrs, and extend mold service life under long-cycle PPO/PET 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 latch, deep cavity and terminal slot contours of high-voltage connectors
5. Automotive-grade uniform texture etching, optimized surface finish matching PPO/PET melt fluidity
6. Optional non-toxic anti-corrosion surface coating compatible with flame-retardant PPO and PET automotive plastics

All mold core, cavity and structural components pass full 3D coordinate measurement inspection to meet strict new energy automotive electronic drawing tolerance standards. Full customization is supported based on customer high-voltage connector samples or 2D/3D engineering drawings: cavity quantity, mold steel grade, cooling channel layout and texture depth can be adjusted according to PPO/PET material reinforcement ratio, IP protection grade and daily production capacity. The modular multi-cavity layout greatly improves molding efficiency while unifying dimensional consistency and surface quality of various high-voltage connector plastic accessories.

Specification Table