China Permanent Magnet Chuck Suppliers - High-Quality Permanent Magnet Suction from Factory
The working principle of permanent magnet suction cups is based on the continuity principle of magnetic flux and the superposition principle of magnetic field. The magnetic circuit is designed as multiple magnetic systems, and through the relative motion of these systems, the magnetic field strength on the working magnetic pole surface is added or cancelled, thereby achieving the purpose of suction and unloading.
When the permanent magnet suction cup is in a magnetic suction state, the magnetic field lines come out of the N pole of the magnet, pass through the magnetic yoke, pass through the ferromagnetic workpiece, and then return to the S pole of the magnet through the magnetic yoke — firmly attracting the workpiece to the working pole surface.
When unloading is required, the magnetic pole enters a demagnetized state. The magnetic field lines no longer form a closed loop on the working pole surface, and almost no magnetic field lines emerge from it — resulting in zero suction force on the workpiece, enabling smooth unloading.
Permanent magnet suction cups typically use high-performance rare earth materials such as neodymium iron boron (NdFeB) as the core. These materials offer strong controllability, low production cost, corrosion resistance, and superior waterproof performance compared to electromagnetic suction cups — making them widely used in mechanical processing and mold manufacturing.
