China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Magnet overmolding injection molding process is a technique for manufacturing magnet products that provide protection and enhanced performance for magnets.In this article, we will introduce you to the process of magnet overmolding injection molding process and explain the key steps involved.
Raw material preparation
Before magnet overmolding injection molding, you first need to prepare the required raw materials. Commonly used raw materials include magnets, plastics and glue. Magnets should be selected with high magnetic properties of the material, such as neodymium iron boron magnets. Plastic can choose heat-resistant, corrosion-resistant materials, such as nylon, polyamide and so on. The glue should have good bonding properties and wear resistance.
Mold Design and Manufacturing
Mold is a key tool for magnet overmolding injection molding, which determines the shape and size of the final product. When designing the mold, the shape and size of the magnet, as well as the shrinkage rate during the injection molding process need to be taken into account. After the mold is manufactured, it needs to be strictly inspected and debugged to ensure its quality and precision.
Arc magnet overmolding injection molding
Injection Molding
Injection molding is the core step of magnet overmolding injection molding. First, the plastic granules are heated to a molten state, and then the molten plastic is injected into the mold through the injection molding machine. During the injection molding process, the temperature, pressure and injection speed of the injection molding machine need to be controlled to ensure that the plastic can fully fill the cavities of the mold and maintain good fluidity.
Cooling and demolding
After injection molding is complete, it is necessary to wait for a period of time to allow the adhesive to cool and cure. The length of the cooling time will vary depending on the adhesive and the mold.
Post-treatment
After curing is completed, post-treatment processes, such as trimming edges, cleaning surfaces, etc., are required to improve the appearance and quality of the product.
Quality Inspection
Finally, the quality inspection of magnet overmolded injection molding products. It mainly includes appearance inspection, size measurement, magnetic property test and so on.
The above is the general process flow of magnet overmolding injection molding, this process is widely used in automotive, medical, home appliances and other fields, especially for the higher protection requirements of the occasion, such as motors, fans, vacuum cleaners and so on.
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