1*4 Cavity PA66 Material Pin Point Gate 2344 HRC48-52 Mold Steel Cavity And Core SPI-B2 Finish Gear Moulding

Product Overview

Key Features

✅ 1×4 Cavity Balanced Design for High Efficiency

• 4 identical gear cavities arranged symmetrically, ensuring balanced melt flow, uniform pressure distribution, and consistent part quality across all cavities.

• Optimized runner layout reduces flow resistance, shortens cycle time, and boosts production output—ideal for medium-to-high volume gear manufacturing.

• Reinforced mould base and guide pillar structure prevent deflection under high injection pressure, maintaining long-term dimensional accuracy.

✅ Precision Pin-Point Gate System for PA66

• Small-diameter pin-point gates are precisely positioned at non-critical gear areas, ensuring clean automatic break during ejection with almost invisible gate vestige—no secondary trimming required, saving labor and avoiding surface damage.

• The gate design matches PA66’s high melting point and fast solidification characteristics, preventing material degradation, weld lines, or short shots on gear teeth.

• Balanced feeding to 4 cavities eliminates quality differences between gears.

✅ Premium 2344 Hot-Work Mould Steel (HRC48-52)

• Constructed from 2344 (1.2344) high-quality hot-work steel, hardened and tempered to HRC48-52, featuring high hardness, excellent toughness, outstanding wear resistance, and good thermal stability.

• Hardened steel resists wear and deformation from long-term PA66 injection, preserving sharp gear tooth profiles and tight tolerances over millions of cycles.

• High-temperature resistance adapts to PA66’s high processing temperature (260–290°C), reducing thermal fatigue and extending mould life to ≥1,000,000 cycles.

✅ SPI-B2 Fine Matte Finish on Cavity & Core

• Both cavity and core surfaces are precision-finished to SPI-B2 standard (fine matte texture, Ra 1.6–3.2 μm).

• The texture provides smooth demolding, reducing friction between the gear and mould surface to avoid scratches or sticking.

• Improves gear surface lubricity during operation, reduces noise and wear during meshing.

• Hides minor molding imperfections, ensuring uniform and professional appearance of PA66 gears.

✅ PA66-Specialized Cooling & Venting System

• Optimized internal cooling channels are arranged close to gear tooth profiles, ensuring fast and uniform cooling of PA66. Controls crystallization rate, prevents warpage, shrinkage, or deformation of gear teeth and hub, guaranteeing precise dimensional accuracy.

• Precision micro-venting slots at gear tooth tips and parting lines effectively discharge trapped air, eliminating burn marks, air bubbles, or incomplete filling on gear surfaces.

• Designed for PA66’s moisture sensitivity, with enhanced drying and venting to avoid bubble defects.

✅ Robust Ejection & Guide System

• Equipped with high-precision straight guide pillars, taper pins, and wear-resistant plates, ensuring accurate mould alignment and smooth opening/closing.

• Multi-point ejection system (ejector pins + ejector sleeves) applies even force on gear hub and tooth root, preventing deformation or cracking during demolding.

• Wear-resistant and replaceable inserts at vulnerable parts reduce maintenance cost and downtime.

Technical Specifications

Application Scenarios

• Automotive: Window regulator gears, door lock gears, wiper motor gears

• Home Appliances: Washing machine reducer gears, blender drive gears, fan motor gears

• Power Tools: Drill gearbox gears, impact wrench transmission gears

• Industrial Equipment: Conveyor drive gears, small reducer gears, precision transmission components

FAQ

1. Q: Why choose PA66 for gear production?

   A: PA66 has high mechanical strength, excellent heat resistance, outstanding wear resistance, and good fatigue resistance, suitable for medium-to-high load gear applications with long service life requirements.
2. Q: What are the advantages of 2344 HRC48-52 steel for gear moulds?

   A: High hardness and wear resistance maintain precise gear tooth profiles; good toughness prevents cracking under high pressure; excellent thermal stability adapts to PA66’s high processing temperature, ensuring long mould life.
3. Q: Why use pin-point gate for PA66 gears?

   A: Pin-point gate leaves no obvious residue, no trimming needed; clean break avoids gear surface damage; balanced feeding ensures consistent quality for 4 cavities.
4. Q: What is the benefit of SPI-B2 finish on cavity and core?

   A: Fine matte texture ensures smooth demolding, reduces gear friction during operation, hides minor defects, and delivers a uniform professional appearance.
5. Q: How long is the service life of this mould?

   A: With proper maintenance (regular cleaning, lubrication, and inspection), the mould life can reach ≥1,000,000 cycles, meeting high-volume production needs.