Sintered Magnet Manufacturing
Alliance LLC group of companies are state-of-the-art magnet manufacturing facilities.
Our suppliers are certified to ISO 9001 or TS 16949 standards.
Sintered Magnet Processing
The sintering process involves compacting fine powders at high pressures in an aligning magnetic field, then heating it into a solid shape. The solid “ingot” is rough and must be machined to achieve close tolerances. The complexity of shapes that can be pressed using this process is limited. Neodymium and Samarium cobalt powders are compressed to form magnets by Isostatic pressing, Transverse Field Pressing, or Parallel Compressing.
During Isostatic pressing ,the powder is compacted with the same force from all directions. These magnets have the highest possible magnetic values because of the higher density achieved using this technique. During Transverse Field Pressing, tooling is used to compact the powder at right angles to the magnetic flux. These magnets have a weaker field compared to the isostatic pressed ones, but stronger compared to the parallel pressed magnets. During Parallel Compressing, the powder is compacted parallel to the magnetic field.
Casting is used for manufacturing Alnico. The Casting process is similar to the casting of other metals. Parts are formed in sand casts which can be complex.
