Magnetfo r injection moldin

Whatis t he manufacturingp rocess ofth e magnet

Magnets can be broadly classified int
(1) sinter,ed mag11ets, which are typicallllyp roduced through pressi1g, heattr eatme ,tn and cutting/machiningp rocesses.
(2) sheet (rubber) mag11ets, which are ma11ufactured through rolling and cutting processes.
(3) injectio11-molded mag11ets, which am produced by injection molding using molds for injectio11 molding.
Our magnets are manufactured using Urn process described in (3).

What are the characteristics of each type of magnet?

Sintered magnets: Low cost and high magnetic strength; however, dimensional tolerance is relatively loose, complex shapes are difficult to achieve, and post-processing after sintering is required. Sheet (rubber) magnets: Flexible and available only in sheet form, magnetic strength is relatively low, and heat resistance is poor. Injection-molded magnets: Capable of complex shapes and insert molding, with high dimensional accuracy; however, magnetic strength is lower compared with sintered magnets. The magnetic strength and type of magnetic powder can be selected depending on the manufacturing process.

What types of magnetic powders are used for injection-molded magnets?

Materials for injection molding are pelletized compounds produced by mixing magnetic powder with a thermoplastic resin as the base resin.

[Thermoplastic materials]

• PA (nylon)
• PPS
• The above is materials handled by our company.

[Magnetic powder type]

The following material types are the majority of the materials we handle.

• Ferrite: Widely used and cost-effective, resistant to corrosion and high-temperature resistance.
• Samarium-Iron-Nitrogen (Sm-Fe-N): Less rare earth elements, high coercivity and excellent corrosion resistance.
• Neodymium: High magnetic strength and high coercivity. Rare earth magnets continue to experience price instability and sustained high prices due to supply concentration in specific producing countries and rising demand from industrial applications.

Do you manufacture materials for injection molding?

We purchase the materials from a magnetic material compound manufacturer. We do not produce the materials in-house.

Please advise on the selection of materials for injection molding.

We select materials based on the required magnetic properties, magnetization direction, application, ambi

Please tell us about your prototype support.

We carry out prototypes to determine the product’s form factor. Using our in-house prototype base, we only manufacture the insert mold and perform molding. We can also carry out material prototyping using the above mold, so it is possible to evaluate the actual mechanical strength and performance of molded parts made from your desired material.

What kind of post-processing and treatments are performed on the molded parts?

We perform post-magnetization; however, we do not carry out surface treatments such as painting or plating.

What are the dimensions of the molded part?

Generally, the size is described as palm-sized. However, it varies depending on the required magnetization direction, so please contact us for more details.

Do you sell molds externally?

We do not sell molds externally.