Rubber magnet, also referred as flexible magnet, is a type of magnet made by blending ferrite magnetic powder with rubber which is then calendered to produce strip, sheet, or roll. Bonded magnet can be divided into compression molded magnet, injection molded magnet, extruded magnet, and calendered magnet base on processing technology. Rubber magnet is belonging to the calendered magnet. Rubber magnets can be easily produced into all kinds of shapes and sizes from a few millimeters to tens of meters owing to exceptional elasticity, flexibility, and machinability. Conventional post processing includes blanking, cut-off, punching, and bending.
Rubber magnet is generally laminated by colorful PVC, adhesive tape, or polychrome printing. Fridge magnet is undoubtedly the most representative application of rubber magnet. Fridge magnet is often utilized to post items or served as decoration. Fridge magnets can be provided in a wide variety of shapes and sizes, therefore, many people treat them as a popular souvenir and collectible objects. Due to the limitations of low magnetic performance, axially multipole magnetization applies to enhance the pull force of fridge magnets.
Flexible magnet is widely served for either civilian uses and industrial applications. Ring magnet wound by axially multipole magnetized magnetic strip is much easier to realize ultra multipole magnetization compared with whole ring magnet, then enable it to serve for fan motors and the vast majority of linear or rotary magnetic encoder. In addition to the frequently-usedĀ ferriteĀ based magnet, Fe3B based magnet with have high Br and low Hcj is also available.
