The manufacturing process of flexible magnets is similar to that of other products. In the formula design, flexible magnets first to determine the variety of magnetic powder, particle size and dosage. Next, flexible magnets should be determined according to the requirements of use, for example, wear - resistant drugs using natural rubber. In the processing of rubber magnetic, before or after vulcanization, it is necessary to add other products do not have the magnetization process to give permanent magnetic products. The advantage of magnetization before vulcanization of rubber is that the direction of external magnetic field remains unchanged. The magnetic flux after curing is poor, but the operation is convenient. All in all, there are advantages and disadvantages.
The physical quantities of flexible magnets used to characterize magnetism include magnetic sensitivity intensity, residual magnetic susceptibility, magnetic energy product, etc. The magnetic sensitivity intensity is the most commonly used, and its measurement unit is gauss (GS). The general rubber magnetism is required to reach the range of 100-600gs.
Flexible magnets, also known as a bonded permanent magnet ferrite, is made of bonded ferrite magnetic powder, rubber or plastics and other materials, which are extruded, rolled or injected. Due to the high plasticity of the material itself, finished products or semi-finished products can be cut, perforated, longitudinally cut and mounted on other materials at will, which is not easy to demagnetize and has good corrosion resistance, mainly divided into two categories: isotropic flexible magnets and anisotropic flexible magnets. The difference is as follows:
1. Different magnetic properties of rubber: isotropic flexible magnet has weak magnetic properties, while anisotropic magnet has higher magnetic properties.
2. Different temperatures and densities of the rubber magnetic work.
3. Different application fields of rubber magnet: isotropic rubber magnet is mainly used in refrigerator magnet, automobile magnet, printing products and products for publicity and promotion. In contrast, anisotropic rubber magnets are widely used in the field of micro motors, computers, laser printers, copiers, magnetic toys and other fields in the preparation of rubber magnets and classification differences