CN1369885A - Plasticized magnetic element and its preparing process - Google Patents
Plasticized magnetic element and its preparing process Download PDFInfo
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- CN1369885A CN1369885A CN 01103810 CN01103810A CN1369885A CN 1369885 A CN1369885 A CN 1369885A CN 01103810 CN01103810 CN 01103810 CN 01103810 A CN01103810 A CN 01103810A CN 1369885 A CN1369885 A CN 1369885A
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Abstract
A plastifying magnetic component and its mfg method includes following steps. (1) The plastifying magnetic material is prepared by selecting magnetic material and plastic material according to certain ratio. (2) Coil is enwound on magnetic body and the position and size of the component is placed in order to ensure certain gap. (3) Both of plastifying magnetic material and magnetic body is put to a die to be carried out molding process. (4) The component is carried out surface treatment. The plastifying magnetic component made by the invented method possesses shielding and isolation properties.
Description
The invention relates to a kind of electronic component and preparation method thereof, particularly a kind of plasticized magnetic element and preparation method thereof.
The packaging part of electronic component generally is to adopt plastifying material (for example resin), its easy making of mat and the characteristic of easily moulding and protect the magnetic (for example iron core) and the coil of inside.Then be accustomed to adding a magnetic material reaching the effect of shielding at the outer surface of this plastifying material, and promoted the inductance value (unit: μ H) of element by this.
In addition, anti-current value (current capability) also is an important electrical specification of this electronic component.Generally speaking, be to adopt the mode that the gap is set to increase anti-current value.But the inductance value of element and anti-current value often present the relation of inverse ratio and are difficult to predict between suitable operating space, and because of the method for making shielding and gap simultaneously is very complicated, also are not suitable for mass-produced demand.
The objective of the invention is to be to provide a kind of plasticized magnetic element that has shielding and insulation characterisitic simultaneously, to save the cost of encapsulation.
Another object of the present invention is to be to provide a kind of plasticized magnetic element, and the mode that this element can recirculation is used the magnetic material that is set at waste material, to save material cost.
A further object of the present invention is the manufacture method that is to provide a kind of plasticized magnetic element, and this manufacture method can utilize ejection formation easy means such as (injection molding) to finish, to save cost of manufacture.
Another purpose of the present invention is the manufacture method that is to provide a kind of plasticized magnetic element, this manufacture method can utilize plastifying material plasticity and flexibly at the appropriate location of this element leaving gap (gap), obtaining best inductance value and anti-current value, and avoid the prior art must the reluctant again shortcoming of cost multiple tracks manufacturing step.
In order to achieve the above object, the invention provides a kind of manufacture method of plasticized magnetic element, it is characterized in that: comprise the following step:
(a) select magnetic material and plastic material, and be allocated as the plasticizing magnetic material to scale;
(b) winding around is in magnetic, and the planning gap is in the position and the size of this element;
(c) should plastify magnetic material and magnetic places in the mould, and carry out the forming processes of this element; And
(d) this element is carried out surface treatment.
The manufacture method of described plasticized magnetic element is characterized in that: this magnetic material can be iron core.
This magnetic material also can be selected from MnZn iron core, nickel zinc-iron core, pure iron powder, dilval, Monimax or amorphous alloy.
This plastic material is optional from thermosets or thermoplastic.
The manufacture method of described plasticized magnetic element is characterized in that: at step (a), this magnetic material can be anticipated into small particle powder, evenly stirs to produce this plasticizing magnetic material with this plastic material again.
The manufacture method of described plasticized magnetic element is characterized in that: at step (b), this gap is size and location of reserving required gap in the mode of dividing plate.
The manufacture method of described plasticized magnetic element is characterized in that: at step (b), the mode that this gap also can core is reserved the size and location in required gap.
The manufacture method of described plasticized magnetic element is characterized in that: at step (b), this gap also can be coated with the size and location that cured mode is reserved required gap.
The manufacture method of described plasticized magnetic element is characterized in that: at step (c), the mode of this moulding can or be revolved the type of being plated to for ejection formation, cast molding, extrusion forming.
The manufacture method of described plasticized magnetic element is characterized in that: also can be coated with at this element surface in advance before in step (c) and block agent, and remove this afterwards in step (c) and block agent.
The manufacture method of described plasticized magnetic element is characterized in that: step (c) before also can be in advance this element surface with baffle region every, and remove this dividing plate afterwards in step (c).
The manufacture method of described plasticized magnetic element is characterized in that: the position and the size that can change this gap in step (c) afterwards in addition with processing.
The present invention also provides a kind of manufacture method of plasticized magnetic element, it is characterized in that: comprise the following step:
(a) select magnetic material and plastic material, and be allocated as the plasticizing magnetic material to scale;
(b) twine the burning coil in magnetic;
(c) should plastify magnetic material and magnetic places in the mould, and carry out the forming processes of this element;
(d) processing is set the gap in the position and the size of this element; And
(e) this element is carried out surface treatment.
The manufacture method of described plasticized magnetic element is characterized in that: this magnetic material can be iron core.
This magnetic material also can be selected from MnZn iron core, nickel zinc-iron core, pure iron powder, dilval, Monimax or amorphous alloy.
This plastic material is optional from thermosets or thermoplastic.
The manufacture method of described plasticized magnetic element is characterized in that: at step (c), the mode of this moulding is ejection formation, cast molding, extrusion forming or revolves the type of being plated to.
The present invention also provides a kind of plasticized magnetic element, comprises:
At least one magnetic;
At least one group of coil is wound in this magnetic;
One packaging part is used to coat this magnetic and coil;
It is characterized in that: this packaging part is to adopt the plasticizing magnetic material, and comprises at least one space, wherein this plasticizing magnetic material mixture that is magnetic material and plastic material.
Described plasticized magnetic element is characterized in that: wherein the magnetic material that is comprised in this plasticizing magnetic material can be an iron core.
The magnetic material that is comprised in this plasticizing magnetic material also can be selected from MnZn iron core, nickel zinc-iron core, pure iron powder, dilval, Monimax or amorphous alloy.
Described plasticized magnetic element is characterized in that: the plastic material that is comprised in this plasticizing magnetic material can be to be selected from thermosets or thermoplastic.
The present invention be utilize the different mixing proportion of plastifying material and magnetic material and be allocated as one the plasticizing magnetic material, the requirement that the designer can reach required electrical specification (for example inductance value and anti-current value) via changing gap length and position, and finish the making of element of the present invention via a simple molding mode, the present invention is because of replacing magnetic material or the plastifying material that prior art only adopts with the plasticizing magnetic material, therefore the characteristic that has shielding and insulation simultaneously, has plasticity because of material of the present invention in addition, therefore this gap length and position are easy to adjust, and also can make in the mode of processing after moulding again.
In order further to understand feature of the present invention and purpose, cooperate preferred embodiment and graphic detailed description now as back:
Graphic simple declaration:
Fig. 1 is the making flow chart of plasticized magnetic element of the present invention;
Fig. 2 is the stereogram of power supply inductor of the present invention;
Fig. 3 is the stereogram of Wound-rotor type chip inductor of the present invention;
Fig. 4 is the stereogram of the transformer used of frequency converter of the present invention;
Fig. 5 is the stereogram of screening arrangement of the present invention;
Fig. 6 is the inductance position of height sense value plasticized magnetic element of one embodiment of the invention and the graph of a relation of anti-current value;
Fig. 7 is the inductance value of low sense value plasticized magnetic element of one embodiment of the invention and the graph of a relation of anti-current value;
Fig. 8 shows the inductance value of the different plasticizing of use magnetic materials and the graphs of a relation of anti-current value.
Fig. 1 is the making flow chart of plasticized magnetic element of the present invention.In step 11, the present invention opens the beginning.In step 12, select the magnetic material and the plastic material that are fit to; Wherein this magnetic material can be, for example: MnZn iron core (Mn-Zn-ferrite), nickel zinc-iron core (Ni-Znferrite), pure iron powder (Ion-powder), dilval (Ni-Fe alloy), Monimax (Mo-Ni-Fe alloy) and amorphous alloy (amorphous alloy) etc., and this plastic material can comprise thermosetting or thermoplastic etc., and the present invention does not have any restriction to this.Thermoplastic is polyethylene (poly ethylene for example, PE), polyvinyl chloride (poly vinylchloride, PVC), polystyrene (poly styrene, PS), polyvinyl acetate (poly vinylacetate), poly-vinegar ammonium is (anti-grand, nylon), cellulose derivative (cellulose derivatives), acrylonitrile-butadiene-styrene polymer (ABS copolymer), polyvinylidene chloride (poly vinylidenechloride), acryl resin (acrylic resin), polypropylene (polypropylene, PP), polybutene (PB) etc., thermosets is phenol resin (phenolic resin) for example, urea resin, melamine resin (melamine resins), epoxy resin (epoxy resin), alkyd resin (alkyd resins) etc.In step 13, this magnetic material is processed into the powder of about 40 to the 50 μ m sizes of diameter, to allocate according to certain proportion with plastic material again, this proportion for example is 1: (0.05～9).Evenly stir subsequently to produce a plasticizing magnetic material.In step 14, the coil (coil) that twines the suitable number of turns according to required electrical specification is at least one magnetic (for example being iron core), and suitable gap length and the position of planning.The gap of required indwelling can be for example isolated in the design of this gap length with a dividing plate (or core), after plasticizing, dividing plate (or core) is separated, can obtain desired gap length and position, another feasible gap design is to use waxing or other to be easy to do to eliminate handle material between insulating material and coil, and after plasticizing wax is removed to obtain required gap.In addition, utilize the waxing mode also can make this gap reach the advantage of multilayer (multi-layer) design, in step 15, carry out moulding design, it is coated with one at element surface and suitable blocks agent or with dividing plate at interval, and element is placed in the mould.Afterwards, utilize various forming methods, for example penetrate, cast, extrude and revolve plating, and make the encapsulation of a multilayer, remove at last block agent or take out dividing plate after, and element is done the surface treatment of final stage.Block agent and be for example wax series (Wax), thermal plastic high polymer (thermoplastic polymer), thermosetting polymer (thermosettingpolymer) etc.It should be noted that: the control in this gap also can be made in the mode of reprocessing after the element moulding of step 15 except that designing the indwelling according to electrical specification in step 14.Element of the present invention comprises plastic material, and because of its special chemical characteristic can be processed after moulding with the change gap length, and this point also is one of technical characterictic of the present invention.In step 16, the present invention finishes.
Plasticized magnetic element of the present invention can be applicable to transformer (inverter transformer) that power supply inductor (power inductor), Wound-rotor type chip inductor (wire wound chip inductor), frequency converter use and screening arrangement (shielding device) etc.Characteristic of the present invention also simply is beneficial to a large amount of manufacturings because of its manufacture method except that can effectively adjusting needed inductance value and anti-current value.
As shown in Figure 2, according to power supply inductor of the present invention (power inductor), the coil (scheming not shown), a packaging part 22 and the gap 23 that comprise at least one magnetic (scheming not shown), twine this magnetic, and this packaging part 22 is to adopt the plasticizing magnetic material.Technical characterictic of the present invention is the magnetic material that replaces prior art with the plasticizing magnetic material, so this packaging part 22 will have the characteristic of shielding and insulation simultaneously.With regard to prior art, if will reach effect of the present invention, must outside magnetic material, coat a layer insulating again, so complicated on processing procedure, therefore the present invention also finishes than prior art on size of making gap 23 and position easily because have the plasticity of plastifying material simultaneously.This gap 23 can allow component designer obtain required inductance value and anti-current value,
As shown in Figure 3, be according to Wound-rotor type chip inductor of the present invention (wire wound chipinductor), the coil 32 and the packaging part 33 that comprise at least one gap 31, at least one magnetic (scheming not shown), this magnetic that winds the line, and this packaging part 33 is to adopt the plasticizing magnetic material, one of technical characterictic of the present invention is the plastic material that replaces prior art with this plasticizing magnetic material, therefore have the characteristic of shielding and insulation simultaneously, and increase inductive effect (inductance) than prior art.In addition, utilize this gap 31 can obtain the inductance value of required electrical specification and improve anti-current value, one of characteristic of the present invention is in the suitable gap length of appropriate location reservation, to make the application of element have more elasticity according to design needs.
As shown in Figure 4, be the transformer of using according to frequency converter of the present invention (invertertranformer), comprise at least one gap 43, an I core 42 (I core) and a U core 41 (U core).One of technical characterictic of the present invention is that the material of this U core 41 is converted to the plasticizing magnetic material by the plastic material of prior art, therefore has the characteristic of shielding and insulation simultaneously, and increases inductive effect than prior art.In addition, utilize and adjust the gap of setting between this 1 core 42 and the U core 41 43, can obtain the inductance value of required electrical specification and improve anti-current value.Plasticized magnetic element of the present invention can reduce manufacture difficulty, the improvement gap error of U core 41 and reduce the complexity and the cost of processing procedure.
As shown in Figure 5, be according to screening arrangement of the present invention, comprise a substrate 52, be positioned at least one magnetic 54 of this substrate 52, the coil 53 that is wound in this magnetic 54 and a packaging part 51, and this packaging part 51 is to adopt the plasticizing magnetic material.One of technical characterictic of the present invention is the plastic material that replaces prior art with the plasticizing magnetic material, because the present invention has the characteristic of shielding and insulation simultaneously, therefore can reduce the interference of extraneous noise than prior art, prior art is if will reach effect of the present invention, then need improve the number of turns of coiled wire-wound coil, so the present invention also there is the advantage that reduces required winding turns than prior art.
Fig. 6 is according to the inductance value of the height sense value plasticized magnetic element (Mn-Zn system) of one embodiment of the invention and the graph of a relation of anti-current value, test condition is to use the coil of line footpath 0.3mm and twine 43 circles, the longitudinal axis is represented inductance value (μ H, transverse axis is represented anti-current value, in Fig. 6, comprise five curves, be respectively gap 0%, 50%, 67%, 75% and 100%, wherein this percentage is represented the vertically ratio of height of this gap length and this element.Demonstrated by this experimental data, shield effectiveness of the present invention is very obvious.When the inductance value of (gap is 0%) after the element complete closed is maximal clearance (gap is 100%) 5/3 to 2 times.And with the increase of showing gap length, this anti-current value also can promote relatively.The designer can follow the guiding of Fig. 6, selects the gap length that is fit to according to required electrical specification.
Fig. 7 is according to the inductance value of the low sense value plasticized magnetic element of one embodiment of the invention and the graph of a relation of anti-current value, and in the same manner, low magnetic conductive material experimental data also shows and the identical shield effectiveness of this high magnetic conductive material experimental data.Change speech, manufacture method of the present invention can be adjusted the inductance value and the anti-current characteristics of element via the size of control gap, make its application have more elasticity.
Fig. 8 shows the inductance value of the different plasticizing of use magnetic materials and the graphs of a relation of anti-current value, and wherein this plastic material is to use epoxy resin and acryl.The experimental result of Fig. 8 shows the screen effect that is same as Fig. 6 and Fig. 7, therefore can reason out manufacture method of the present invention applicable to all plastic materials (comprising thermosets and thermoplastic).
One embodiment of manufacture method of the present invention is to use MnZn (Mn-Zn) Magnaglo (＜50 μ m), stirring with 1: 1 mixed acryl resin forms, and the bar magnet sintered body of Mn-Zn magnetic material is twined the interface that separate with interleaving agent (low temperature paraffin) coating desire 7 circle backs with line footpath 1mm.The Mn-Zn bar magnet body that will comprise coil places in the mould, will plastify magnetic material fast and inject in the mould.After treating the acryl resin sclerosis, in mould, take out, and in 100 ℃ of heating stripping interleaving agents, and the trim elements surface.
Another embodiment of manufacture method of the present invention uses nickel zinc (Ni, Zn Magnaglo (＜50 μ m), with 1: 0.5 mixed epoxy resin, adding curing agent after stirring 20 minutes stirred 2 minutes, with Ni, after the bar magnet sintered body of Zn magnetic material twines 7 circles with line footpath 1mm, with a dividing plate separation gap.The Ni-Zn bar magnet body that will comprise coil places in the mould, will plastify magnetic material fast and inject in the mould.After treating epoxy cure, in mould, take out, and the trim elements surface.
Claims (21)
1, a kind of manufacture method of plasticized magnetic element is characterized in that: comprise the following step:
(a) select magnetic material and plastic material, and be allocated as the plasticizing magnetic material to scale;
(b) winding around is in magnetic, and the planning gap is in the position and the size of this element;
(c) should plastify magnetic material and magnetic places in the mould, and carry out the forming processes of this element; And
(d) this element is carried out surface treatment.
2, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: this magnetic material is an iron core.
3, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: this magnetic material is selected from MnZn iron core, nickel zinc-iron core, pure iron powder, dilval, Monimax or amorphous alloy.
4, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: this plastic material is selected from thermosets or thermoplastic.
5, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: at step (a), this magnetic material is anticipated into small particle powder, evenly stirs to produce this plasticizing magnetic material with this plastic material again.
6, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: at step (b), this gap is size and location of reserving required gap in the mode of dividing plate.
7, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: at step (b), this gap is size and location of reserving required gap in the mode of core.
8, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: at step (b), this gap is to reserve the size and location in required gap to be coated with cured mode.
9, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: at step (c), the mode of this moulding is ejection formation, cast molding, extrusion forming or revolves the type of being plated to.
10, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: be coated with at this element surface in advance before in step (c) and block agent, and remove this afterwards in step (c) and block agent.
11, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: step (c) before in advance this element surface with baffle region every, and remove this dividing plate afterwards in step (c).
12, the manufacture method of plasticized magnetic element according to claim 1 is characterized in that: the position and the size that change this gap in step (c) afterwards in addition with processing.
13, a kind of manufacture method of plasticized magnetic element is characterized in that: comprise the following step:
(a) select magnetic material and plastic material, and be allocated as the plasticizing magnetic material to scale;
(b) twine the burning coil in magnetic;
(c) should plastify magnetic material and magnetic places in the mould, and carry out the forming processes of this element;
(d) processing is set the gap in the position and the size of this element; And
(e) this element is carried out surface treatment.
14, the manufacture method of plasticized magnetic element according to claim 13 is characterized in that: this magnetic material is an iron core.
15, the manufacture method of plasticized magnetic element according to claim 13 is characterized in that: this magnetic material is selected from MnZn iron core, nickel zinc-iron core, pure iron powder, dilval, Monimax or amorphous alloy.
16, the manufacture method of plasticized magnetic element according to claim 13 is characterized in that: this plastic material is selected from thermosets or thermoplastic.
17, the manufacture method of plasticized magnetic element according to claim 13 is characterized in that: at step (c), the mode of this moulding is ejection formation, cast molding, extrusion forming or revolves the type of being plated to.
18, a kind of plasticized magnetic element comprises:
At least one magnetic;
At least one group of coil is wound in this magnetic;
One packaging part is used to coat this magnetic and coil;
It is characterized in that: this packaging part is to adopt the plasticizing magnetic material, and comprises at least one space, wherein this plasticizing magnetic material mixture that is magnetic material and plastic material.
19, plasticized magnetic element according to claim 18 is characterized in that: wherein the magnetic material that is comprised in this plasticizing magnetic material is an iron core.
20, plasticized magnetic element according to claim 18 is characterized in that: magnetic material based MnZn iron core, nickel zinc-iron core, pure iron powder, dilval, Monimax or the amorphous alloy of being selected from that is comprised in this plasticizing magnetic material wherein.
21, plasticized magnetic element according to claim 18 is characterized in that: the plastic material that is comprised in this plasticizing magnetic material is to be selected from thermosets or thermoplastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01103810 CN1369885A (en) | 2001-02-15 | 2001-02-15 | Plasticized magnetic element and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01103810 CN1369885A (en) | 2001-02-15 | 2001-02-15 | Plasticized magnetic element and its preparing process |
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| Publication Number | Publication Date |
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| CN1369885A true CN1369885A (en) | 2002-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01103810 Pending CN1369885A (en) | 2001-02-15 | 2001-02-15 | Plasticized magnetic element and its preparing process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499370B (en) * | 2008-10-20 | 2011-07-13 | 山东鲁能泰山电力设备有限公司 | Pouring coil surface no-spraying process of dry-type transformer and lens face plate mould used for the process |
| CN102416685A (en) * | 2011-09-15 | 2012-04-18 | 中煤科工集团重庆研究院 | Magnetic forming method of plastic |
-
2001
- 2001-02-15 CN CN 01103810 patent/CN1369885A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499370B (en) * | 2008-10-20 | 2011-07-13 | 山东鲁能泰山电力设备有限公司 | Pouring coil surface no-spraying process of dry-type transformer and lens face plate mould used for the process |
| CN102416685A (en) * | 2011-09-15 | 2012-04-18 | 中煤科工集团重庆研究院 | Magnetic forming method of plastic |
| CN102416685B (en) * | 2011-09-15 | 2013-12-04 | 中煤科工集团重庆研究院 | Magnetic forming method of plastic |
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