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Help CenterWholesale PA/PPS Magnetic Ring Rotor Injection Parts: Radial Multipole NdFeB Core, Mold Protection System for B2B Motor Assembly
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Changzhou Hongxinyutai Precision Mold Co., Ltd. (established in 2017) specializes in precision injection molding and tooling solutions for the automotive and industrial motor sectors. Our Wholesale PA/PPS Magnetic Ring Rotor Injection Parts are engineered with a Radial Multipole NdFeB Core and an integrated Mold Protection System, delivering consistent magnetic performance and extended tool life for B2B motor assembly lines. With a factory spanning 1,000–3,000 square meters and a team of 51–100 skilled employees, we ensure each component meets rigorous quality standards under TS16969 certification.
These injection parts are specifically designed for high-volume production of brushless DC (BLDC) motors, servo motors, and other precision drives where radial multipole magnetization is critical for torque density and efficiency. The combination of PA/PPS resin with a radially oriented NdFeB magnet core provides excellent mechanical strength, thermal resistance, and magnetic flux concentration.
Key Features & Technical Specifications
- Material Options: PA (high toughness, cost-effective) or PPS (superior chemical resistance, higher temperature rating). Both offer excellent dimensional stability.
- Magnetic Core: Sintered NdFeB with radial multipole orientation – up to 12 poles standard, customizable up to 24 poles.
- Mold Protection System: Integrated sensors and wear-resistant inserts reduce downtime, prevent flash, and maintain consistent cavity pressure during injection.
- Precision Tolerance: ±0.05 mm on critical dimensions, ensuring concentricity and balance for high-speed rotor assemblies.
- Surface Finish: As-molded smooth finish reduces eddy current losses; optional coating for enhanced corrosion resistance.
- Production Capacity: 50,000–200,000 pieces per month per mold, depending on cycle time.
| Parameter | Value / Range |
| Magnet Grade | N35 – N52 (customizable) |
| Max Operating Temp | PA: 120°C / PPS: 180°C |
| Magnetic Flux Density | 1.2 – 1.4 T (at surface) |
| Mold Protection | In-mold pressure/temperature monitoring, anti-stick coating |
| Injection Cycle Time | 25 – 45 seconds (depending on size) |
Advantages for B2B Motor Assembly
- Improved Motor Efficiency: Radial multipole configuration reduces cogging torque and improves smooth operation, especially in low-speed applications.
- Reduced Assembly Complexity: The injection-molded ring integrates the magnet and housing in one part, eliminating separate bonding or pressing steps.
- Enhanced Durability: PA/PPS encapsulation protects the brittle NdFeB magnet from chipping, corrosion, and demagnetization due to thermal cycling.
- Cost Savings: High-volume injection molding with mold protection yields lower per-part cost compared to traditional magnet gluing or potting.
- Consistent Quality: TS16969-certified production ensures process control, traceability, and defect rates below 50 ppm.
Our factory in Changzhou, Jiangsu, China, operates with CNC machining centers, EDM, and injection molding machines ranging from 50 to 300 tons. We ship globally via Jiangsu, Shanghai, and Shenzhen ports, serving markets including North America, Europe, Southeast Asia, and the Middle East. With over 80% of our clients in the automotive and industrial motor sectors, we have accumulated deep expertise in rotor assembly requirements.
Trusted by global OEMs and Tier 1 suppliers, our magnetic ring rotor injection parts undergo 100% magnetic field measurement and dimensional inspection before shipment. We offer free sample evaluation for qualified customers, and our engineering team can assist in optimizing the magnet pole design for your specific motor topology.
Contact us today to discuss your B2B motor assembly needs. Our team provides competitive wholesale pricing, flexible lead times (4–6 weeks for standard molds), and dedicated after-sales support. Let us help you accelerate your motor production with reliable, performance-driven injection parts.
Frequently Asked Questions (FAQ)
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Q: What is the difference between PA and PPS for this product?
A: PA (Nylon) offers good impact resistance and lower cost, suitable for standard operating temperatures up to 120°C. PPS provides higher thermal stability (up to 180°C), better chemical resistance, and lower moisture absorption, ideal for harsh environments. -
Q: Can you customize the number of magnetic poles?
A: Yes, we can produce radial multipole magnets with 2 to 24 poles. The pole count, magnetization pattern, and magnetic strength can be tailored to your motor design. Please provide your target back-EMF waveform or torque requirements. -
Q: How does the mold protection system work?
A: Our mold protection system includes in-mold pressure sensors, thermocouples, and wear-resistant coatings. It automatically halts the injection cycle if abnormal pressure or temperature is detected, preventing damage to the mold and ensuring consistent part quality. -
Q: Do you have TS16969 certification? What does it cover?
A: Yes, we are certified under TS16969 (equivalent to IATF 16949). This certification covers our quality management system for automotive production, including design control, process validation, and continuous improvement. -
Q: What is the minimum order quantity (MOQ) for wholesale?
A: For standard sizes, MOQ is 5,000 pieces per design. Custom molds typically require a one-time tooling cost and a minimum order of 10,000 pieces. Contact us for volume discounts. -
Q: How do you ensure the magnet does not demagnetize during injection molding?
A: The NdFeB core is pre-magnetized after molding. During injection, the resin is processed at temperatures well below the magnet's Curie temperature (typically 310°C), and the mold is cooled rapidly to preserve magnetic properties. -
Q: What packaging options are available?
A: We offer anti-static trays, vacuum-sealed bags, and custom packaging to prevent magnetization or mechanical damage during transit. Parts are shipped in cartons or pallets as per customer requirements. -
Q: Can you supply samples for testing?
A: Yes, sample parts are available for evaluation after a non-disclosure agreement (NDA) and sample fee. The sample fee is refundable upon first bulk order. Delivery time is typically 2–3 weeks for samples.
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