Bonded Ferrite Molding: Achieving Dimensional Accuracy in Magnets

In terms of dimensional accuracy, this process can reliably hold tolerances in the range of IT grades IT7 to IT9 on critical dimensions. In more practical terms, this often translates to tolerances within ±0.05% to ±0.3% of a part‘s nominal dimension, influenced by factors like part geometry and material formulation. The inherent shrinkage of the material during cooling, typically between 0.2% and 0.6%, is a key factor that engineers meticulously account for in the mold design phase. By accurately predicting and compensating for this shrinkage, manufacturers can achieve a high degree of repeatability from the first part to the thousandth.

This leads us to consistency, which is where injection molding truly shines. Once the process parameters—including temperature, pressure, and cooling rates—are optimized and stabilized, the process yields remarkably uniform parts. For a stable production run, dimensional consistency for key features can often be maintained within ±0.1% or better. This high level of repeatability is crucial for applications where components must fit seamlessly into assemblies without secondary machining, such as in sensors, small motors, or shielding elements. It‘s this reliable consistency, combined with good geometric freedom, that makes injection molding a go-to choice for high-volume production of bonded ferrite magnets.

If you are interested in purchasing high-quality ferrite bonding materials, please feel free to contact us at info@tecomag.net at any time. Tecomag is an enterprise specialized in permanent magnet products, integrating design,manufacturing, sales and technology service.

With deep technical background and rich experiences in the related industry, we provide customers magnet products with high quality and competitive price.