General steps of the magnet injection molding process

The magnet injection molding process is a manufacturing method that embeds magnets into plastic materials. It is mainly used to produce magnetic plastic parts with specific shapes and functions. This process combines the performance of magnetic materials with the molding convenience of plastics, so that the products have both magnetic functions and complex geometric structures and protective characteristics. The following are the basic steps, characteristics and application introductions of the magnet injection molding process.

General steps of the magnet injection molding process:

1. Magnet selection

According to the application requirements of the final product, select the appropriate type of magnet, such as NdFeB, ferrite or other types.

2. Magnet pretreatment

Magnets need to be surface treated before injection molding, such as cleaning and polishing, to improve the adhesion between the magnet and the plastic.

3. Mold design

When designing an injection mold, it is necessary to reserve the precise placement of the magnet to ensure that the magnet can be firmly embedded in the plastic.

4. Injection molding material preparation

Select a suitable plastic material, considering its heat resistance, mechanical strength and whether special properties are required (such as high temperature resistance, flame retardant).

5. Injection molding

Under the conditions of controlled temperature and pressure, the molten plastic is injected into the mold to surround the pre-placed magnet. The temperature must be strictly controlled during the injection molding process to avoid excessive temperature causing demagnetization of the magnet.

6. Cooling and removal

After the injection is completed, let the plastic cool and solidify for a certain period of time, and then remove the molded part from the mold.

7. Inspection and testing

Finally, various tests such as magnetic properties, dimensional accuracy, and appearance quality are carried out to ensure that they meet customer requirements.