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Precision Mold Sleeves & Positioning Washers
This series consists of custom cylindrical mold sleeves and flat positioning washers for precision injection and stamping molds. The machining tolerance reaches ±0.002mm, featuring mirror inner and outer surfaces, high concentricity and outstanding wear resistance, widely used in manufacturing electronic connectors, automotive miniature plastic parts and semiconductor components.

 

  • Main Products: Step forming sleeve, straight mold cylinder, double-step mold bushing, flat positioning washer, thin locating spacer
  • Machining Precision: ±0.002mm ultra-high precision
  • Optional Materials: Mold steel, high-speed steel, tungsten steel, hard alloy, custom metal materials
  • Processing Technology: CNC turning, inner & outer cylindrical grinding, surface mirror polishing, precision lapping
  • Product Features: Perfect coaxiality, burr-free inner bore, uniform hardness, low clearance fit, long service life
  • Application Industries: Consumer electronics, automotive wiring harness, medical micro plastic parts, semiconductors
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Detailed Introduction

Mold sleeves and positioning washers are essential circular functional components for precision molds. Multi-step forming sleeves are responsible for shaping outer contours of small plastic and metal workpieces, while flat positioning washers control mold closing depth and ensure consistent cavity alignment. The ultra-precise inner bore and outer cylindrical surface eliminate dimensional runout, which effectively avoids uneven wall thickness and dimensional deviation on finished products.

All parts adopt standardized full-process precision manufacturing: CNC rough turning for basic profiles, vacuum heat treatment to improve surface hardness, dual-axis precision grinding to guarantee coaxiality, and final mirror polishing to reduce molding friction. Each finished component undergoes roundness, concentricity and full dimensional inspection to meet high-cycle continuous mass production standards.

Customization is supported based on 2D/3D drawings or physical samples. Material grades and surface roughness standards can be optimized according to molding temperature, workpiece material and daily production volume to extend mold service life and lower defect rates.

Specification Table

ItemDetails
Product NameCustom Precision Mold Sleeves & Positioning Washers
Core Product RangeStep Forming Sleeve, Straight Mold Cylinder, Double-Step Mold Bushing, Flat Positioning Washer, Thin Locating Spacer
Machining Tolerance±0.002mm
Available MaterialsMold Steel, High-Speed Steel, Tungsten Steel, Hard Alloy, Custom Metal Materials
Manufacturing ProcessCNC Turning, Precision Inner & Outer Grinding, Mirror Polishing, Ultra-Fine Lapping
Product AdvantagesStrict roundness & concentricity control, mirror-smooth molding surface, stable dimensional consistency under cyclic molding, excellent anti-wear performance
Application FieldsPrecision injection molding and thin-metal stamping for miniature connectors, terminal housings and micro structural plastic parts

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