Plastic package coil mould pressing inductor and production process thereof

Abstract

The invention relates to the technical field of electronic components, and particularly discloses a plastic package coil mould pressing inductor and a production process thereof. The plastic package coil mould pressing inductor comprises an electric conductor used for generating induction current, a plastic package layer wrapping the electric conductor, and a magnet body wrapping the plastic package layer. According to the plastic package coil mould pressing inductor and the production process thereof, the limitation of the physical performance of the electric conductor on the magnetic powder material compression molding process can be weakened, and the electromagnetic performance of the plastic package coil mould pressing inductor can be improved.

Description

technical field [0001] The invention relates to the technical field of electronic components, in particular to a plastic coil molded inductor and a production process thereof. Background technique [0002] At present, the high-current inductors on the market mainly include integrally formed coil inductors and copper sheet inductors with assembled structures. Specifically, the coil inductance production process is as follows: [0003] ① Wind the enameled wire into a coil; [0004] ② Place the coil in the cavity; [0005] ③Inject magnetic powder material into the mold cavity; [0006] ④Pressure compression molding; [0007] ⑤ After low-temperature baking and solidification, the magnetic powder material forms the main part of the magnet covering the coil (the wire ends of the coil are exposed for wiring). [0008] During the above production process: [0009] If the compression molding pressure is too high, the outer protective layer of the enameled wire will be damaged. ...

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Problems solved by technology

[0009] If the compression molding pressure is too high, the outer protective layer of the enameled wire will be damaged. Therefore, the compression molding pressure is generally small, which will cause the density of the magnet body to be small, which is not conducive to improving the magnetic permeability of the coil inductance;

[0010] If the baking temperature is too high, the outer protective layer of the enameled wire will be damaged. Therefore, the baking temperature is generally small, and the high-temperature sintering process cannot be used, which will limit the selection range of magnetic powder materials, which is not conducive to increasing the upper voltage limit of the coil inductance. For example, the upper voltage limit of the current coil inductance is generally lower than 100V

[0011] In summary, since the coil is directly in contact with the magnetic powder material, the performance of the outer protective layer of the coil itself has greatly restricted the compression molding process of the magnetic powder material, which is not conducive to the further improvement of the electromagnetic properties (electrical and magnetic properties) of the current coil inductance.

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