CN107189486A - A kind of preparation method of inductance and its preparation method of capsulation material - Google Patents
A kind of preparation method of inductance and its preparation method of capsulation material Download PDFInfo
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- CN107189486A CN107189486A CN201710374493.9A CN201710374493A CN107189486A CN 107189486 A CN107189486 A CN 107189486A CN 201710374493 A CN201710374493 A CN 201710374493A CN 107189486 A CN107189486 A CN 107189486A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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Abstract
The invention discloses a kind of preparation method of inductance and its preparation method of capsulation material, the powder that wherein it is 60%~90% by percentage by weight that the preparation method of its capsulation material, which includes, is uniformly mixed with the liquid crystal polymer that percentage by weight is 10%~40%, again by the material extrusion molding of mixing, form granule materials, the as capsulation material of inductance, wherein powder are the one or more in nickel-zinc ferrite powder, manganese-zinc ferrite powder, iron silicochromium powder, iron sial powder；The preparation method of inductance, including the magnetic core for winding enamel covered wire is welded to connect on lead frame, then injection molding packaging is carried out by foregoing capsulation material, making obtains inductance.The preparation method of inductance proposed by the present invention and its preparation method of capsulation material, plastic packaging is carried out to inductance by specific capsulation material, there need not be silver electrode, also without nickel plating or zinc-plated, production cost has also greatly been saved while the performance of inductance is improved.
Description
Technical field
The present invention relates to preparation method and its preparation of capsulation material in inductance making field, more particularly to a kind of inductance
Method.
Background technology
Existing traditional inductance is that to magnetic core center pillar after complete line, two ends lead is placed in the hanging wire groove of magnetic core, due to
Hanging wire groove has electrode, and copper cash point is welded in hanging wire groove and fixed, while the copper cash gluing on center pillar is packaged, above and below magnetic core
Blade is still completely naked to be exposed on the outside；As shown in figure 1, being traditional structural representation that the inductance made is encapsulated by glue spreading method
Figure, the wherein inductance are, around enamel covered wire 12 on magnetic core 11, and enamel covered wire lead to be hung on hanging wire groove, welding electrode
13, it is packaged wherein only applying magnetic glue on magnetic core 11, other parts are exposed；What the inductance so made was present asks
Topic has：Because hanging wire groove has certain depth, the mechanical property to inductance has a certain impact；Magnetic core is naked simultaneously is exposed on the outside,
Be easy to it is dirty, even get rusty, security also cannot be guaranteed, and it is bad to radiate, at gluing or magnetic core it is possible that
Cracking；Need to set silver electrode again, add production cost；It is also possible to that excessive glue occurs during coating technique in addition, lacks
Glue, bubble and the bad phenomenon such as dirty, are painted with after adhesive curing and also need to be cleaned with alcohol ultrasonic wave every time, with oven for drying, very
It is dangerous.
The disclosure of background above technology contents is only used for design and the technical scheme that auxiliary understands the present invention, and it is not necessarily
Belong to the prior art of present patent application, without tangible proof show the above present patent application the applying date
In the case of disclosed, above-mentioned background technology should not be taken to evaluate the novelty and creativeness of the application.
The content of the invention
In order to solve the above technical problems, the present invention proposes a kind of preparation method of inductance and its preparation side of capsulation material
Method, plastic packaging is carried out by specific capsulation material to inductance, it is not necessary to is had silver electrode, also without nickel plating or zinc-plated, is being improved
Production cost has also greatly been saved while the performance of inductance.
In order to achieve the above object, the present invention uses following technical scheme：
The invention discloses a kind of preparation method of the capsulation material of inductance, comprise the following steps：
A1：The liquid crystal polymer that the powder for being 60%~90% by percentage by weight is 10%~40% with percentage by weight
Uniform mixing, wherein the powder is in nickel-zinc ferrite powder, manganese-zinc ferrite powder, iron silicochromium powder, iron sial powder
One or more；
A2：By mixed uniformly material extrusion molding in step A1, granule materials are formed, the granule materials are inductance
Capsulation material.
Preferably, mixed uniformly step is specifically to be carried out in vacuum kneading machine in step A1, and temperature is 330~
400 DEG C, the time is 2~4h.
Preferably, specifically included in step A2：Mixed uniformly material extrusion in step A1 is cut into a diameter of 2~
6mm, length is 2~10mm granule materials.
The present invention discloses a kind of capsulation material of inductance, it is made using above-mentioned preparation method.
The invention also discloses a kind of preparation method of inductance, comprise the following steps：
B1：Enamel covered wire is wound on the center pillar of magnetic core, hanging wire groove and electrode are not provided with the magnetic core；
B2：Several magnetic cores for winding enamel covered wire are placed in into the magnetic core of lead frame respectively to place on position, it is described
Several magnetic cores are set to place position on lead frame, the upper and lower ends that each magnetic core places position are respectively equipped with hanging wire groove, in institute
The groove along above-below direction is respectively equipped with the both sides for stating hanging wire groove, one end of the groove is communicated to the magnetic core and put
Set；
B3：The two ends of the enamel covered wire of several magnetic cores for winding enamel covered wire are respectively welded and is connected to the magnetic core and puts
At the hanging wire groove of set upper and lower ends；
B4：The lead frame for being connected with several magnetic cores for winding enamel covered wire is placed in injection machine, using foregoing
The capsulation material of inductance carries out injection molding packaging as raw material；
B5：After the completion of injection, trimming above and below the vertical direction by the lead frame along the groove forms several
The independent inductance for treating whole pin, then whole pin is carried out to each inductance respectively, obtain inductance.
Preferably, the lead frame places position provided with 30~50 magnetic cores.
Preferably, multiple positioning holes are respectively equipped with the lead frame, lead frame positioning is placed on the note
In molding machine.
Preferably, the temperature of injection molding packaging step is 330~400 DEG C in step B4.
The present invention also also discloses a kind of inductance, is made using foregoing preparation method.
Compared with prior art, the beneficial effects of the present invention are：The capsulation material of the inductance of the present invention uses nickel zinc iron
Ferromagnetic powder, manganese-zinc ferrite powder, iron silicochromium powder, one or more of powders in iron sial powder and liquid crystal polymer are mixed
Merge the granule materials obtained by extrusion molding, by the way that capsulation material is moulded on magnetic core, magnetic core is wrapped completely so that
Hanging wire groove and electrode need not be set on the magnetic core for making inductance, it is not required that nickel plating is zinc-plated so that the mechanics of the inductance of making
Performance is high, inductance value is high, current saturation characteristic is good, and D.C. resistance and AC resistance are relatively low, due to by magnetic core plastic packaging inside, both
It is elegant in appearance, there is security, more advantageous in terms of reliability, the temperature shock characteristic of plastic packaging product, mechanical shock again
Characteristic, high/low-temperature impact characteristic, high-frequency vibration characteristic, roll-off characteristic etc. are all better than traditional gluing inductance performance, are produced
Inductance there is high added value, be especially suitable for applying and making automobile inductor product.
In further scheme, inductance is produced using plastic package process, a mould disposably can be with 30~50 inductance of plastic packaging
Product, the time is only 0.5min, and can realize fully-automatic production, it is not necessary to artificial operation, it is ensured that inductor product
Uniformity, on the basis of performance is improved, substantially increases production efficiency again.
Brief description of the drawings
Fig. 1 is the structural representation of inductance made from traditional gluing；
Fig. 2 is that the magnetic core for winding line of the preferred embodiment of the present invention is welded on the structural representation on lead frame；
Fig. 3 is the structural representation that inductance is made by the preparation method of the preferred embodiment of the present invention.
Embodiment
Below against accompanying drawing and with reference to preferred embodiment the invention will be further described.
The preferred embodiments of the present invention disclose a kind of preparation method of the capsulation material of inductance, comprise the following steps：
A1：The liquid crystal polymer that the powder for being 60%~90% by percentage by weight is 10%~40% with percentage by weight
Uniform mixing, wherein powder are one in nickel-zinc ferrite powder, manganese-zinc ferrite powder, iron silicochromium powder, iron sial powder
Plant or several；The mixed uniformly step is specifically what is carried out in vacuum kneading machine, and temperature is 330~400 DEG C, and the time is 2
~4h.
A2：Mixed uniformly material extrusion in step A1 is cut into a diameter of 2~6mm, length is 2~10mm particle
Material, the granule materials are the capsulation material of inductance.
Another preferred embodiment of the present invention also discloses a kind of capsulation material of inductance, is made by above-mentioned preparation method.
The preferred embodiments of the present invention also disclose a kind of preparation method of inductance, comprise the following steps：
B1：Enamel covered wire is wound on the center pillar of magnetic core, hanging wire groove and electrode are not provided with magnetic core, the power of magnetic core is added
Performance is learned, simultaneously because being not required to set silver electrode, production cost is significantly reduced；
B2：As shown in Fig. 2 several magnetic cores 21 for winding enamel covered wire to be placed in the magnetic core of lead frame 30 respectively
Place on position (not showing in figure, positioned at the lower section blocked by magnetic core), set several magnetic cores to place position, each magnetic on lead frame 30
The upper and lower ends that core places position are respectively equipped with hanging wire groove 31, and the sky along above-below direction is respectively equipped with the both sides of hanging wire groove 31
Heart groove 32, one end of groove 32 is communicated to magnetic core and places position；In certain embodiments, lead frame 30 is provided with 30~50 magnetic
Core places position, can greatly improve the production efficiency of plastic packaging inductance；And multiple positioning holes 33 are provided with lead frame 30, to cause
Lead frame 30 can be positioned and is placed in injection machine；
B3：The two ends of the enamel covered wire of several magnetic cores 21 for winding enamel covered wire are respectively welded and are connected to magnetic core placement
At the hanging wire groove 31 of position upper and lower ends；
B4：The lead frame 30 for being connected with several magnetic cores 21 for winding enamel covered wire is placed in injection machine, before
The capsulation material for the inductance stated carries out injection molding packaging as raw material, and the temperature of injection molding packaging is 330~400 DEG C；
B5：After the completion of injection, trimming above and below the vertical direction by lead frame 30 along groove 32 forms several independences
The inductance for treating whole pin, then whole pin is carried out to each inductance respectively, obtains the other positions except upper/lower electrode 22 by plastic packaging
Packaged inductance 20, as shown in Figure 3.
The present invention is further elaborated below by way of more specifically embodiment.
Embodiment one：
The liquid crystal polymer that the nickel-zinc ferrite powder for being first 60% by percentage by weight is 40% with percentage by weight
(LCP) uniformly mixed in vacuum kneading machine, temperature is 330 DEG C, and the time is 3h, after the completion of mixing, extrusion is cut into diameter
The granule materials for being 5mm for 3mm, length, i.e., as the capsulation material of inductance；It is ready for magnetic core and enamel covered wire, wherein magnetic
There is no hanging wire groove and electrode on core, enamel covered wire is wound on magnetic core center pillar, due to there is no hanging wire groove on magnetic core, add magnetic core
Mechanical property, simultaneously because be not required to set silver electrode, significantly reduce production cost；The magnetic core after line will be wound to be placed on
The magnetic core of lead frame is placed on position, and 50 magnetic cores are provided with lead frame and place position, each magnetic core places the upper and lower ends point of position
Not She You hanging wire groove, the groove along above-below direction is respectively equipped with the both sides of hanging wire groove, one end of groove is communicated to
Magnetic core places position, and the hanging wire for being connected to two sections above and below magnetic core placement position is respectively welded in the lead that will wind the two ends of the magnetic core of line
At groove；After the completion of welding, the lead frame for being connected with 50 magnetic cores for winding line is placed in injection machine (wherein in lead frame
Both sides are also provided with multiple positioning holes, and lead frame is placed on to the mould of injection machine together with 50 magnetic core positioning to be molded
It is interior), injection molding packaging as raw material is carried out using the capsulation material of the inductance of foregoing preparation, plastic packaging temperature is 330 DEG C, and inductance is whole
Inside, because inductance two ends lead is welded on lead frame, the lead on lead frame can be drawn plastic packaging as electrode；Most
Afterwards, after the completion of injection, because the lead on lead frame is drawn as electrode, trimming is carried out, then carries out whole pin, be i.e. production obtains list
Individual plastic packaging inductor product.
Embodiment two：
The liquid crystal polymer that the manganese-zinc ferrite powder for being first 65% by percentage by weight is 35% with percentage by weight
(LCP) uniformly mixed in vacuum kneading machine, temperature is 350 DEG C, and the time is 2.5h, after the completion of mixing, extrusion is cut into straight
Footpath is the granule materials that 3mm, length are 5mm, i.e., as the capsulation material of inductance；Magnetic core and enamel covered wire are ready for, wherein
There is no hanging wire groove and electrode on magnetic core, enamel covered wire is wound on magnetic core center pillar, due to there is no hanging wire groove on magnetic core, add magnetic
The mechanical property of core, simultaneously because being not required to set silver electrode, significantly reduces production cost；The placement of the magnetic core after line will be wound
Placed in the magnetic core of lead frame on position, 40 magnetic cores are provided with lead frame and place position, each magnetic core places the upper and lower ends of position
Hanging wire groove is respectively equipped with, the groove along above-below direction, one end connection of groove are respectively equipped with the both sides of hanging wire groove
Position is placed to magnetic core, the extension for being connected to two sections above and below magnetic core placement position is respectively welded in the lead that will wind the two ends of the magnetic core of line
At wire casing；After the completion of welding, the lead frame for being connected with 40 magnetic cores for winding line is placed in injection machine (wherein in lead frame
Both sides be also provided with multiple positioning holes, lead frame is placed on to the mould of injection machine together with 40 magnetic cores positioning to be molded
Tool in), using foregoing preparation inductance capsulation material as raw material carry out injection molding packaging, plastic packaging temperature be 350 DEG C, inductance is complete
Inside, because inductance two ends lead is welded on lead frame, the lead on lead frame can be drawn portion's plastic packaging as electrode；Most
Afterwards, after the completion of injection, because the lead on lead frame is drawn as electrode, trimming is carried out, then carries out whole pin, be i.e. production obtains list
Individual plastic packaging inductor product.
Embodiment three：
The liquid crystal polymer (LCP) that the iron silicochromium powder for being first 70% by percentage by weight is 30% with percentage by weight
Uniformly mixed in vacuum kneading machine, temperature be 360 DEG C, the time is 2h, after the completion of mixing, extrusion be cut into a diameter of 3mm,
Length is 5mm granule materials, i.e., as the capsulation material of inductance；Magnetic core and enamel covered wire are ready for, is not had on magnetic core wherein
There are hanging wire groove and electrode, enamel covered wire is wound on magnetic core center pillar, due to there is no hanging wire groove on magnetic core, add the mechanics of magnetic core
Performance, simultaneously because being not required to set silver electrode, significantly reduces production cost；The magnetic core after line will be wound and be placed on lead frame
Magnetic core place on position, 50 magnetic cores are provided with lead frame and place positions, the upper and lower ends that each magnetic core places position are respectively equipped with
Hanging wire groove, is respectively equipped with the groove along above-below direction at the both sides of hanging wire groove, and one end of groove is communicated to magnetic core and put
Set, will wind the two ends of the magnetic core of line lead be respectively welded be connected to magnetic core place position above and below two sections hanging wire groove at；
After the completion of welding, the lead frame for being connected with 50 magnetic cores for winding line is placed in injection machine (wherein in the both sides of lead frame
Multiple positioning holes are also provided with, lead frame is placed in the mould of injection machine together with 50 magnetic core positioning to be molded),
Using foregoing preparation inductance capsulation material as raw material carry out injection molding packaging, plastic packaging temperature be 360 DEG C, inductance whole plastic packagings
Inside, because inductance two ends lead is welded on lead frame, the lead on lead frame can be drawn as electrode；Finally, note
After the completion of modeling, because the lead on lead frame is drawn as electrode, trimming is carried out, then carries out whole pin, be i.e. production obtains single modeling
Seal inductor product.
Example IV：
First by iron silicochromium powder and iron sial powder that percentage by weight is 90%, with the liquid that percentage by weight is 10%
Crystalline polymer (LCP) is uniformly mixed in vacuum kneading machine, and temperature is 370 DEG C, and the time is 2h, after the completion of mixing, extrusion
The granule materials that a diameter of 3mm, length are 5mm are cut into, i.e., as the capsulation material of inductance；It is ready for magnetic core and enamel-cover copper
There is no hanging wire groove and electrode on line, wherein magnetic core, enamel covered wire is wound on magnetic core center pillar, due to there is no hanging wire groove on magnetic core,
The mechanical property of magnetic core is added, simultaneously because being not required to set silver electrode, production cost is significantly reduced；It will wind after line
Magnetic core is placed on the magnetic core of lead frame and placed on position, and 30 magnetic cores are provided with lead frame and place position, each magnetic core places position
Upper and lower ends are respectively equipped with hanging wire groove, and the groove along above-below direction is respectively equipped with the both sides of hanging wire groove, groove
One end be communicated to magnetic core place position, will wind the two ends of the magnetic core of line lead be respectively welded be connected to magnetic core place position above and below two
At the hanging wire groove of individual section；After the completion of welding, the lead frame for being connected with 30 magnetic cores for winding line is placed in injection machine (wherein
Multiple positioning holes are also provided with the both sides of lead frame, lead frame is placed on note together with 30 magnetic core positioning to be molded
In the mould of molding machine), using foregoing preparation inductance capsulation material as raw material carry out injection molding packaging, plastic packaging temperature be 370
DEG C, inside, because inductance two ends lead is welded on lead frame, the lead on lead frame can be used as electricity to inductance whole plastic packaging
Draw pole；Finally, after the completion of injection, because the lead on lead frame is drawn as electrode, trimming is carried out, then carries out whole pin, i.e.,
Production obtains single plastic packaging inductor product.
Performance test is carried out by the inductance for preparing above-mentioned several embodiments, and obtained with traditional gluing making
The performance of inductance be compared, the result for obtaining performance test is as shown in table 1.
The performance test contrast of the traditional gluing inductance of table 1 and the inductance of the embodiment of the present invention
From table 1 it follows that the performance of the inductance prepared by plastic packaging of the embodiment of the present invention is than traditional gluing work
The inductance of skill production will get well, and inductance value is high, current saturation characteristic will get well, and D.C. resistance (DCR) and AC resistance (ACR) are relatively low,
Due to by product plastic packaging inside, it is not only elegant in appearance but also with security.
It can realize that plastic packaging makes inductance by the capsulation material of the inductance of the preferred embodiment of the present invention, solve well
The deficiency of existing inductance gluing, because inductance two ends are welded on lead frame, on lead frame by the whole plastic packagings of inductance inside
Lead can be drawn as electrode, by the whole pin of trimming, be required package inductance；By by the complete plastic packaging of inductance inside,
Both it is elegant in appearance, there is security again, and inductance is operationally, and heat dispersion is uniformly good；And using the present invention preferably
The inductance preparation method of embodiment a, mould disposably can be with 30~50 products of plastic packaging, and the time is 0.5min, and can entirely certainly
Dynamic production, it is not necessary to artificial operation, it is ensured that improve production efficiency while the uniformity of product.
In addition, produce inductance by plastic package process avoids the various bad phenomenons occurred in coating technique well, and
And groove need not be set in electrode surface, the mechanical property of magnetic core and inductance is added, and in electrode surface also without setting
Silver electrode, it is not required that nickel plating is tin plating, it is only necessary to which the copper cash two ends wound are welded on lead frame, by lead frame trimming
Whole pin, can as plastic packaging inductance electrode, greatly saved production cost.
The performance of plastic packaging inductance that the plastic package process of the present invention is obtained compares the inductance of traditional coating technique production also significantly
Improve, inductance value is high, current saturation characteristic will get well, and D.C. resistance and AC resistance are relatively low, due to by product plastic packaging inside, both
It is elegant in appearance and have with security；It is more advantageous in terms of reliability, the temperature shock characteristic of plastic packaging product, machinery punching
Hit characteristic, high/low-temperature impact characteristic, high-frequency vibration characteristic, roll-off characteristic etc. all better than traditional gluing inductance performance, give birth to
The inductor product of production has high added value, is particularly suitable for the plastic packaging of automobile inductor product.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For those skilled in the art, do not taking off
On the premise of from present inventive concept, some equivalent substitutes or obvious modification can also be made, and performance or purposes are identical, all should
When being considered as belonging to protection scope of the present invention.
Claims (9)
1. a kind of preparation method of the capsulation material of inductance, it is characterised in that comprise the following steps：
A1：The percentage by weight powder for being 60%~90% and liquid crystal polymer that percentage by weight is 10%~40% is uniform
Mixing, wherein the powder is one in nickel-zinc ferrite powder, manganese-zinc ferrite powder, iron silicochromium powder, iron sial powder
Plant or several；
A2：By mixed uniformly material extrusion molding in step A1, granule materials are formed, the granule materials are the modeling of inductance
Closure material.
2. preparation method according to claim 1, it is characterised in that mixed uniformly step is specifically true in step A1
Carried out in empty kneading machine, temperature is 330~400 DEG C, the time is 2~4h.
3. preparation method according to claim 1, it is characterised in that specifically included in step A2：Will be uniform in step A1
The material extrusion of mixing cuts into a diameter of 2~6mm, and length is 2~10mm granule materials.
4. a kind of capsulation material of inductance, it is characterised in that be made using the preparation method described in any one of claims 1 to 3.
5. a kind of preparation method of inductance, it is characterised in that comprise the following steps：
B1：Enamel covered wire is wound on the center pillar of magnetic core, hanging wire groove and electrode are not provided with the magnetic core；
B2：Several magnetic cores for winding enamel covered wire are placed in into the magnetic core of lead frame respectively to place on position, the lead
Several magnetic cores are set to place position on frame, the upper and lower ends that each magnetic core places position are respectively equipped with hanging wire groove, are hung described
The groove along above-below direction is respectively equipped with the both sides of wire casing, one end of the groove is communicated to the magnetic core and placed
Position；
B3：The two ends of the enamel covered wire of several magnetic cores for winding enamel covered wire are respectively welded and are connected to the magnetic core placement position
At the hanging wire groove of upper and lower ends；
B4：The lead frame for being connected with several magnetic cores for winding enamel covered wire is placed in injection machine, using claim 4 institute
The capsulation material for the inductance stated carries out injection molding packaging as raw material；
B5：After the completion of injection, trimming above and below the vertical direction by the lead frame along the groove forms several independences
The inductance for treating whole pin, then whole pin is carried out to each inductance respectively, obtains inductance.
6. preparation method according to claim 5, it is characterised in that the lead frame is placed provided with 30~50 magnetic cores
Position.
7. preparation method according to claim 5, it is characterised in that multiple positioning holes are respectively equipped with the lead frame,
So that lead frame positioning is placed in the injection machine.
8. preparation method according to claim 5, it is characterised in that the temperature of injection molding packaging step is 330 in step B4
~400 DEG C.
9. a kind of inductance, it is characterised in that be made using the preparation method described in any one of claim 5 to 8.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1637964A (en) * | 2003-12-22 | 2005-07-13 | 太阳诱电株式会社 | Surface mounting coil parts and producing method thereof |
| CN102856037A (en) * | 2012-09-17 | 2013-01-02 | 深圳顺络电子股份有限公司 | Power inductance element formed by molding and manufacturing method thereof |
| CN104900390A (en) * | 2015-05-29 | 2015-09-09 | 深圳市铂科磁材有限公司 | Novel high density integrated electric inductance manufacturing method |
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2017
- 2017-05-24 CN CN201710374493.9A patent/CN107189486B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1637964A (en) * | 2003-12-22 | 2005-07-13 | 太阳诱电株式会社 | Surface mounting coil parts and producing method thereof |
| CN102856037A (en) * | 2012-09-17 | 2013-01-02 | 深圳顺络电子股份有限公司 | Power inductance element formed by molding and manufacturing method thereof |
| CN104900390A (en) * | 2015-05-29 | 2015-09-09 | 深圳市铂科磁材有限公司 | Novel high density integrated electric inductance manufacturing method |
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