Explore our engineering-grade custom magnetic solutions engineered for high performance under extreme conditions.
As a national high-tech leader in the rare earth magnetics industry, Zhejiang Laysun Magnetics Ltd. has dedicated over two decades to the research, development, custom manufacturing, and global export of high-grade Sintered NdFeB magnets. Our engineering practices prioritize the optimization of magnet stability, geometric precision, and protective encapsulation coatings to meet stringent industrial criteria.
Our operational hub spans a massive footprint, utilizing advanced vacuum induction furnaces, multi-station automated hydraulic presses, helium-protected jet milling lines, and automated rubber/silicone injection molding systems. We bridge the gap between basic raw material extraction and precision-engineered assembly solutions for world-leading OEMs in automotive, aerospace, green energy, and industrial robotics sectors.
Deep-dive research into corrosion barriers, shear forces, and surface preservation using elastomeric jackets.
Sintered NdFeB is highly susceptible to intergranular oxidation due to its iron-rich matrix. Standard metallic coatings like NiCuNi, Zinc, or Epoxy can fail under dynamic shear or high-humidity exposure. Our high-density vulcanized EPDM and TPU rubber coatings form a hermetic barrier. This seals the raw magnetic substrate from air, humidity, salt sprays, and acidic solutions, extending service life in sub-sea, automotive chassis, and marine deployments.
In vertical shear applications (such as mounting signs, sensors, or brackets onto steel structures), a raw magnet exhibits low friction coefficient, sliding down under minimal gravity loads. Our custom-compounded Santoprene and EPDM elastomeric layers significantly increase the coefficient of friction. This increases the structural slide resistance up to 400% compared to typical metal-faced magnets, maximizing load capacity without scratching mating surfaces.
Sintered rare earth magnets are structurally ceramic, brittle, and prone to chipping, cracking, or fracturing under impact loads. Sudden collisions between magnets and steel plates can lead to structural failures. The rubberized jacket acts as a structural shock absorber. It disperses localized mechanical energy and protects the inner magnetic core from thermal shock and violent contact forces.
| Material Type | Hardness (Shore A) | Operational Temp (°C) | UV & Weather Resistance | Oil & Chemical Barrier | Ideal Application Environment |
|---|---|---|---|---|---|
| EPDM Rubber | 70 - 80 | -40 to +120 | Outstanding | Good | Outdoor mounting systems, automotive exteriors, marine hulls |
| Santoprene (TPE) | 65 - 85 | -50 to +125 | Excellent | Excellent | Industrial automation actuators, sensor mounts, wind turbine sensors |
| Silicone Rubber | 50 - 70 | -60 to +200 | Excellent | Moderate | High-temperature ovens, medical devices, sanitary environments |
| TPU (Polyurethane) | 85 - 95 | -30 to +80 | Good | Outstanding | High mechanical wear, heavy mining equipment, tool retention clamps |
For strategic procurement officers, purchasing industrial magnets requires strict quality assurance and reliable logistics. Minor variances in raw materials or magnetic characteristics can lead to performance issues in complex assemblies. Zhejiang Laysun Magnetics Ltd. addresses this through extensive control over the value chain.
We source high-purity Neodymium (Nd), Praseodymium (Pr), Iron (Fe), and Boron (B) raw elements directly from verified mining syndicates, mitigating geopolitically driven supply chain risks. Every single batch is validated via Inductively Coupled Plasma (ICP) spectroscopy and Hysteresisgraph analysis to guarantee true remanence (Br), coercivity (Hcb/Hcj), and energy product (BHmax) alignment with customer requirements.
Our production facilities maintain multi-tier inventories of standard rubber-coated pot magnets, cylindrical hold systems, and multi-pole arrays to ensure quick fulfillment for scheduled global deliveries. We support diverse shipping channels (Ocean, Air Cargo, Rail, and Express Couriers) with customized protective packaging designed to block magnetic flux emissions during air cargo transit.
How sectors integrate our advanced rare earth assemblies to drive technological shifts.
Automotive powertrains and Electronic Power Steering (EPS) motors depend on NdFeB magnets that can endure high thermal stress and mechanical vibrations. Encapsulation inside customized engineering resins or elastomeric casings prevents magnetic degradation caused by engine fluids, moisture, and road debris, helping maintain peak torque transmission across the vehicle's lifespan.
Offshore wind turbines operate in highly corrosive marine atmospheres. Raw magnets quickly fail in these environments. Our rubberized, multi-layered corrosion-resistant pot magnets and custom segmented pole pieces provide the physical insulation needed for reliable performance in coastal and marine wind energy systems.
High-speed assembly automation demands dynamic component handling without damaging delicate surfaces. Our rubber-coated disc and block magnets allow grippers to securely lift, transport, and release metal plates and delicate parts without leaving scratches or inducing mechanical shock.
Our commitment to sustainable processing, material innovations, and strict regulatory standards.
Reducing dependence on Heavy Rare Earth Elements (HREE) like Dysprosium (Dy) and Terbium (Tb). Our R&D team uses advanced Grain Boundary Diffusion (GBD) methods to increase intrinsic coercivity at high temperatures, reducing cost volatility while maintaining excellent thermal performance.
We are phasing out halogenated plasticizers. Our next-generation rubber coatings use bio-based thermoplastic elastomers (TPEs) that match EPDM in UV resistance and mechanical strength, reducing our overall carbon footprint.
Transitioning from multi-step manual assembly to fully automated co-injection molding. This process eliminates internal air pockets, ensures uniform coating thickness, and improves the consistency of the final product's physical dimensions.
Hangzhou Headquarters coordinating worldwide operations, subsidiaries, and sales support networks.
Answers to common questions from design engineers and procurement leads regarding magnetic performance.
High-grade magnetic products for specialized mechanical clamping and heavy lift operations.
Our facilities are audited to meet the requirements of international certification bodies.
Need custom rubber-coated magnet arrays, specific mechanical integration assistance, or detailed B-H demagnetization curves? Contact our technical sales team for engineering support and direct factory quotes.
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