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When working on projects involving motors, sensors and encoders, a particular type of magnet is frequently used: injection-moulded magnets (injection-moulded ferrite rings). When purchasing injection-moulded magnets, injection-moulded ferrite rings or injection-moulded neodymium-iron-boron rings, many customers often ask questions such as: ‘Which manufacturer has produced this specification before?’, ‘Are there any ready-made moulds available?’, ‘Can we produce a sample first?’, and so on…
This is because injection-moulded magnets are largely bespoke products; dimensions, number of poles, magnetisation methods, material formulations and precision requirements all vary. If a manufacturer lacks experience or does not have ready-made moulds, both the development cycle and costs will increase significantly. Consequently, for common applications such as injection-moulded magnetic rings for motors, encoders, sensor magnets and plastic-magnet rotor rings, many customers prefer to work directly with magnet manufacturers that have proven track records and moulds in stock. This not only speeds up the quotation process but also facilitates prototyping.
The image below is an injection-molded neodymium magnetic ring
Currently, injection-moulded magnets on the market mainly fall into two categories: injection-moulded ferrite and injection-moulded neodymium-iron-boron. Both can be magnetised according to product requirements, including single- or double-sided axial multi-pole magnetisation, radial multi-pole magnetisation, and oblique-pole magnetisation. For common ring specifications, such as those with outer diameters of 9.5 mm, 18 mm, 25 mm, 40 mm and 59 mm, we have accumulated a significant number of ready-made moulds, which can save on tooling costs and reduce prototyping lead times.
If you currently have specific dimensions, pole counts, magnetisation methods or application scenarios for injection-moulded magnets, you can send the drawings directly to our online customer service team via the website for a price quotation or to find a similar size. Sometimes, even for specifications you consider very specialised, we may already have a suitable mould available, allowing us to proceed directly to prototyping and production.
Select the dimensions of the injection molded magnet; https://www.couragemagnet.com/tags/422.html
This is a very small rectangular ferrite block magnet, measuring 2.45 mm in length and 1 mm in both width and height. It is magnetised along its length and is barely noticeable when held in the hand....
7.4x6x5mm Ferrite Small Block Magnet Introduction，Material: Hard Ferrite (Ceramic)，Shape: Block / Rectangle / Bar，Coating: No Coating，Grade (Chinese Stardard): Y30，Operating temperature: -40°C to 250°C，Delivery time: 7-15 days，Magnetization direction: thickness....
U-shaped neodymium magnets are a type of high-performance permanent magnet material with a structure resembling the letter ‘U’. Manufactured from sintered neodymium-iron-boron, they are characterised by high magnetic energy product....
This is a radial 4-pole ring (Hollow cylinder) magnet, the material is bonded NdFeB, with high magnetic performance, the size is 16mm outer diameter, inner hole 5mm, height 20mm, surface gray epoxy treatment, suitable for water pump motor...
This product is a 4-pole ring magnet, injection-molded ferrite material, the sample size is 22mm outer diameter, 7mm inner diameter, 4mm thickness, 2 N poles and 2 S poles, mainly used for push rod motors, magnetic induction devices, encoders, etc.,...
This is a radial 2 pole circular magnet designed specifically for magnetic encoder chips. It is made of sintered neodymium-iron-boron with N35 grade performance and is suitable for standard environments....
This product is a multi pole magnetic ring with an inner diameter of 1.5mm. The material is injection molded ferrite. It adopts axial multi pole magnetization and is mainly used for DC motors. If you have a sample of similar injection molded magnetic products, please contact us for quotation....
This is a very small size rectangular block magnet with galvanized surface, 3mm length, 1.5mm width and height, with very fine tolerance, magnetized by lengthwise direction, mainly used in precision electronics, instrumentation, please contact us if you need to buy....