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Custom Single-Cavity High-Density Pin Connector Injection Mold
This split male & female precision injection mold is tailor-made for multi-row fine pin electronic connector housings, with integrated slide core structure to form dense tiny terminal slots. It achieves molding tolerance ±0.003mm, adopts high-hardness polished mold steel, and delivers stable long-cycle mass production of small precision electronic connectors for consumer electronics and industrial control modules.

 

  • Main Product: Split male-female multi-row fine pin connector injection mold
  • Machining Precision: ±0.003mm
  • Optional Materials: 718H, S136, STAVAX, NAK80 mold steel
  • Processing Technology: 5-axis CNC, sinker EDM, wire EDM, precision grinding, vacuum heat  treatment, mirror polishing
  • Product Features: Split mold structure, slide undercut demolding, dense micro pin cavity, low shrinkage, long service life, fully custom per drawings/samples
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Detailed Introduction

This matched male and female connector mold set is designed for multi-row fine pin miniature electronic connectors. The mold core is equipped with sliding core inserts to handle side undercut structures of the connector housing, avoiding product deformation during ejection. The central dense micro-slot cavity precisely forms rows of tiny terminal positioning holes, ensuring consistent pin spacing and assembly matching accuracy between male and female connector pairs. Optimized balanced runner system solves uneven filling issues for thin-wall small plastic parts, effectively preventing short shots, burrs and dimensional deviation in mass production.

The full precision manufacturing workflow strictly controls micro feature accuracy: intricate fine pin slot contours are finished via micro sinker EDM and wire EDM; mold steel undergoes vacuum heat treatment to boost hardness and wear resistance; multi-stage precision grinding and mirror polishing eliminate sharp edges around tiny cavities for smooth demolding. Optional PVD coating can be applied to cavity surfaces to enhance corrosion resistance against glass-filled PA and LCP engineering plastics.

All mold inserts, slide blocks and mold base components pass full CMM coordinate measurement inspection before mold assembly to guarantee matching precision of male and female mold halves. We fully support custom development based on customer 2D/3D drawings or physical connector samples. Cavity layout, slide mechanism design, mold steel grade and surface treatment can be adjusted according to daily output, plastic material and service life requirements, meeting high-precision mass production demands of miniature multi-pin electronic connectors.

Specification Table

ItemDetails
Product NameCustom Split Male-Female Multi-Row Fine Pin Electronic Connector Injection Mold
Core Product RangeMatched male & female multi-row fine pin connector injection mold set
Molding Tolerance±0.003mm dimensional accuracy for molded miniature plastic connectors
Available Materials718H pre-hardened mold steel, S136 stainless mold steel, STAVAX corrosion-resistant steel, NAK80 high-polish mold steel
Manufacturing Process5-Axis CNC Milling, Micro Sinker EDM, Wire EDM, Precision Surface Grinding, Vacuum Heat Treatment, Mirror Polishing, Optional Nitriding / PVD Surface Coating
Product AdvantagesMatched split mold design for male-female connector pairs, slide core demolding for side undercuts, uniform filling for thin-wall tiny parts, consistent pin hole dimensional stability, stable production over 500,000 molding cycles, fully customized based on customer samples or technical drawings
Application FieldsConsumer electronics signal connectors, industrial control board multi-pin connectors, communication module miniature connecting housings

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