Mold pouring molding wound inductor and preparation method thereof

Abstract

The invention provides a preparation method of a mold pouring molding wound inductor, It comprises the following steps, A prefabricated soft magnetic core-soft magnetic core outer coating treatment-soft magnetic core terminal electrode formation-coil wire winding, spot welding-fixture pouring magnetic glue-drying glue-lower fixture-external inspection-printing-test, That is, the soft magnetic Mn-Zn ferrite material is adopted as the winding body, the Mn-Zn ferrite material has relatively high initial magnetic permeability, the initial magnetic permeability of the Mn-Zn ferrite material is morethan 5 times of the initial magnetic permeability of the Ni-Zn ferrite material, and the eddy current loss of the Mn-Zn ferrite material is small, and the quality factor is high.

Description

technical field [0001] The invention relates to an inductor, in particular to a wire-wound inductor molded by mold injection and a preparation method thereof. Background technique [0002] At present, the soft magnetic core material used in semi-shielded magnetic glue wound inductors is nickel-zinc ferrite material or alloy iron-silicon-chromium material. The process uses a precision dispenser to evenly coat the mixed magnetic glue on the wound inductor The magnetic shielding of the inductance coil is realized in the wide area of ​​the wrapping wire; at present, the soft magnetic material is nickel-zinc ferrite material or alloy iron-silicon-chromium material, because the initial magnetic permeability of nickel-zinc ferrite material or alloy iron-silicon-chromium material is low , high coercive force; high material loss; more coils need to be wound in the production of wire-wound inductors, leading to a rather long length of winding enameled wire, so the winding DC impedance...

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Problems solved by technology

[0002] At present, the soft magnetic core material used in semi-shielded magnetic glue wound inductors is nickel-zinc ferrite material or alloy iron-silicon-chromium material. The process uses a precision dispenser to evenly coat the mixed magnetic glue on the wound inductor The magnetic shielding of the inductance coil is realized in the wide area of ​​the wrapping wire; at present, the soft magnetic material is nickel-zinc ferrite material or alloy iron-silicon-chromium material, because the initial magnetic permeability of nickel-zinc ferrite material or alloy iron-silicon-chromium material is low , high coercive force; high material loss; more coils need to be wound in the production of wire-wound inductors, leading to a rather long length of winding enameled wire, so the winding DC impedance is high, and the final product generates heat when it is energized Large, low efficiency; and the number of coil windings is large, resulting in a relatively full inductance wire package. When the magnetic glue is applied, it is easy to form a vertical flow of glue, which affects the welding between the inductor and the PCB; at the same time, due to the exposed soft magnetic core, the affected The external impact force is limited, and the magnetic core body is prone to chipping and damage

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