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Polyurethane-Coated Magnetic Bases: Common Uses and Selection Tips

Common Uses of Polyurethane-Coated Magnetic Bases

I. What is a Polyurethane-Coated Magnetic Base?

A polyurethane-coated magnetic base is a magnetic mounting component that encapsulates a strong magnet (such as neodymium) within a polyurethane elastic material shell, combined with a metal base for installation (e.g., internal thread, external thread, countersunk hole).
Polyurethane offers wear resistance, elasticity, impact resistance, and corrosion protection, effectively safeguarding the magnet from external damage and enhancing its suitability in complex working conditions.

II. Main Uses of Polyurethane-Coated Magnetic Bases

  1. Clamping and Positioning in Automation Equipment

    Widely used in industrial robots, assembly lines, and sensor positioning to quickly clamp, limit, and align via magnetic force, allowing repeated repositioning.

  • Example: End effector of a robotic arm uses coated magnets to hold metal workpieces, avoiding hard impacts.

  • Advantages: Easy installation, strong magnetic force, impact fatigue resistance.

  1. Metal Door Holders and Movable Mechanism Magnetic Retention

    Used in automatic doors, machine covers, and inspection ports as magnetic attachments to keep closed states or provide automatic reset adsorption.

  • Example: Mechanical cabinet door magnetic closure with threaded magnetic bases for easy replacement and maintenance.

  • Advantages: Prevents mechanical lock wear, improves ease of opening.

  1. Hidden Magnetic Components in Furniture Industry

    Used in office furniture, drawer systems, or display racks. The polyurethane coating prevents surface scratches while offering a clean and aesthetic look.

  • Example: Used for display cabinet shelves or movable shelf positioning.

  • Advantages: Surface-friendly, concealed installation, stable magnetism.

  1. Outdoor or Humid Environment Fixing Applications

    Polyurethane coating offers excellent waterproof and rustproof performance, suitable for temporary fixing or quick positioning of outdoor billboards, signage, and electrical equipment.

  • Example: Magnetic installation for temporary outdoor surveillance equipment.

  • Advantages: Strong weather resistance, UV and salt spray corrosion resistance.

  1. Temporary Positioning and Welding Fixtures for Sheet Metal

    Commonly used in metal processing for temporary clamping and positioning, such as welding alignment and initial assembly stages.

  • Example: Magnetic positioning used for quick assembly on steel structures at construction sites to improve efficiency.

  • Advantages: Reusable, fast positioning, reduces manual intervention.

III. Advantages of Using Polyurethane-Coated Magnetic Bases

  • Anti-slip and wear-resistant: Polyurethane has a high friction coefficient to prevent slippage on the adsorption surface.

  • Protects the magnet core: Coating prevents oxidation, chipping, or cracking of the magnet core.

  • Supports multiple installation forms: Available with threads, bolt holes, countersunk holes, etc., offering strong adaptability.

  • Good environmental resistance: Suitable for large temperature differences, high humidity, or slight chemical corrosion environments.

  • Stable suction force: Even polyurethane thickness ensures consistent and controllable magnetic force, avoiding uneven magnet exposure.

IV. Selection and Usage Recommendations

  • Determine magnetic force based on adsorption surface material and thickness.

  • Prefer products with cushioning coating structures to reduce damage risk to metal parts.

  • Ensure adsorption surface is clean and flat during installation to avoid interference with magnetic adhesion.

  • For outdoor or long-term installation, select UV-resistant polyurethane materials to enhance lifespan.

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