Magnetic laminate

Unveiling the secrets of magnetic laminate production: Without sophisticated craftsmanship, how can there be excellent performance?

Magnetic laminates, as a shining pearl in modern industrial materials, have shown broad application prospects in motors, sensors, transformers and other fields with their unique magnetism and excellent physical properties. However, behind this high-performance material, exquisite manufacturing technology is indispensable.

The raw materials for making magnetic laminates mainly include magnetic powder, resin matrix and reinforcing materials. Magnetic powder is the key to giving laminates magnetism, and commonly used ones include ferrite, neodymium iron boron, etc. The resin matrix plays the role of bonding and fixing magnetic powders. Common resins include epoxy resin, phenolic resin, etc. Reinforcing materials are used to improve the mechanical properties and heat resistance of laminates, such as glass fiber cloth, carbon fiber cloth, etc.

In the raw material preparation stage, the ratio and quality of various raw materials need to be strictly controlled. The particle size, purity and magnetic properties of magnetic powder will directly affect the magnetic properties of laminates; the viscosity, curing speed and thermal stability of the resin matrix will affect the molding and performance stability of laminates; the type, specification and amount of reinforcing materials will affect the mechanical properties and heat resistance of laminates.

After the raw materials are prepared, the magnetic powder and the resin matrix need to be mixed evenly in a certain proportion. During the mixing process, special stirring equipment is required to ensure that the powder and the resin are fully mixed to avoid the generation of lumps and impurities. After the mixing is completed, the reinforcement material is placed in the resin matrix for pre-impregnation treatment, so that the reinforcement material can fully absorb the resin and prepare for the subsequent lamination.

Lamination is a key step in the production of magnetic laminates. The pre-impregnated reinforcement material is laid in the molding mold according to the predetermined number of layers and directions. Then, a layer of mixed magnetic powder and resin mixture is evenly laid on the reinforcement material. Next, the mold is placed in a hot press and laminated at a certain temperature and pressure.

During the lamination process, the control of temperature and pressure is crucial. Too low temperature will lead to incomplete curing of the resin, affecting the performance of the laminate; too high temperature may cause the resin to burn or the magnetic powder to oxidize. At the same time, appropriate pressure can make the layers of materials tightly combined and improve the strength and density of the laminate.

After the lamination is completed, the magnetic laminate needs to be post-processed. The laminate is removed from the mold and cooled and cured. Then, the laminate is trimmed and polished to remove excess corners and burrs. The laminate is magnetized and tested for performance to ensure that it meets the requirements for use.

During the post-processing process, cooling and curing can fully cure the resin and improve the stability and durability of the laminate. Trimming and polishing can improve the appearance quality of the laminate and improve its use effect. Magnetization and performance testing can ensure that the magnetic properties and physical properties of the laminate meet the requirements for use.

The production process of magnetic laminates is a complex and delicate process that requires strict control of the quality and parameters of each link. Through reasonable raw material ratios, precise mixing and pre-preg, precise lamination molding and strict post-processing, magnetic laminates with excellent performance can be produced. With the advancement of science and technology and the development of industry, the production process of magnetic laminates will continue to be optimized and improved, providing strong support for the development of more fields.