CN105268980A - Extruding granulation method for soft-magnetism powder - Google Patents
Extruding granulation method for soft-magnetism powder Download PDFInfo
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- CN105268980A CN105268980A CN201410336080.8A CN201410336080A CN105268980A CN 105268980 A CN105268980 A CN 105268980A CN 201410336080 A CN201410336080 A CN 201410336080A CN 105268980 A CN105268980 A CN 105268980A
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- soft magnetic
- magnetic powder
- powder
- extruder grain
- disk
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- 239000000843 powder Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005469 granulation Methods 0.000 title claims abstract description 28
- 230000003179 granulation Effects 0.000 title claims abstract description 28
- 239000000853 adhesive Substances 0.000 claims abstract description 18
- 230000001070 adhesive effect Effects 0.000 claims abstract description 18
- 239000006247 magnetic powder Substances 0.000 claims description 34
- 239000004744 fabric Substances 0.000 claims description 16
- 239000003085 diluting agent Substances 0.000 claims description 8
- 210000005056 cell body Anatomy 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 12
- 239000002245 particle Substances 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Glanulating (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses an extruding granulation method for soft-magnetism powder. The extruding granulation method comprises the steps that the soft-magnetism powder and an adhesive solution are mixed and stirred evenly; the mixed soft-magnetism powder and adhesive solution are put into a stock bin; extruding granulation is conducted; and disc granulation is conducted. The granulation powder obtained through the method has the characteristics of being high in apparent density and good in mobility. According to the extruding granulation method for the soft-magnetism powder, the extruding granulation and disc granulation are combined, so that the powder is made to be in the long-strip shape with a narrow particle size distribution in the soft state in earlier stage, and then the powder shape maintaining the soft state is changed into a nearly ellipse from the long-strip shape through the high centrifugal movement of a disc. The powder obtained through the method has the characteristics of being narrow in particle size distribution and good in shape, and therefore, the apparent density and the mobility of granulation powder are improved greatly. Specifically, the apparent density is equal to or greater than 2.0 g/cm<3>, and the mobility is smaller than or equal to 55 seconds.
Description
Technical field
The present invention relates to the forming method of soft magnetic powder, especially a kind of prilling process of soft magnetic powder.
Background technology
Metal dust, as a kind of metal form except block, band, has that three-dimensional dimension is little, excellent, easily shaping, material form feature flexibly.But general metal dust can not directly be applied, and to need compressing be certain profile, and just can become spendable product through corresponding post processing.For this reason, powder needs to possess certain mobility and density just can complete shaping process, and therefore metal dust needs usually through granulation is that the powder with apparent density and mobility could meet technological requirement.
Common prilling process has following several:
One, mechanical crushing method
As the term suggests be exactly the granule method of the bulky grain of drying machinery being broken for certain particle size.The briquetting pressure that the metal dust needs prepared of the method are higher, powder morphology is generally all with jagged, and size distribution is wide, apparent density and mobility bad.
Two, extruder grain method
Extruder grain is that metal dust is forced through screen cloth by the strength of machinery under the prerequisite being mixed with adhesive.Powder prepared by the method has narrow particle size distribution, advantage simple to operate, but the shortcoming that its powder morphology is poor, prilling powder rough surface, apparent density and mobility are bad.
Three, disc granulation method
Metal dust is dropped into disk by granulating disc orderly, and sprinkling simultaneously has close-burning organic liquid makes powder reunite at random together.The advantage of disc granulation: product pattern is subsphaeroidal, powder surface is smooth, granulating efficiency is high, operation directly perceived, powder flowbility is good, shortcoming is that size distribution is wide, the skewness of adhesive content, powder are excessive.
Four, fluidized bed comminution granulation
By atomizer, feed liquid is atomized into tiny drop in fixing fluidized bed inside, drop contacts with the material being in fluidised variable grain in fluidized bed, and is attached to particle surface and completes drying-granulating process; Its advantage can be completed in a fluidized bed granulation, drying, cooling, granule size is adjustable within the specific limits in addition, and powder morphology is good, powder surface is smooth, powder flowbility and the advantage such as apparent density is good, but its size distribution is wide, adhesive content distribution may exist uneven problem.
Five, spray granulation
Spray granulation by the pump housing, material is sent into high-speed rotary rotatably dispersion impeller continuously after being mixed with adhesive solution by powder, thus make metal dust and adhesive be pulverized as granule simultaneously, be dried instantaneously when dispersed compound particles runs into external high temperature gas and shape, thus obtaining the powder with reunion shape; The method granulation efficiency is high, prilling powder pattern is good, powder surface is smooth, powder flowbility and the advantage such as apparent density is good, but its size distribution is wide, diluent consumption is large, adhesive content distribution may exist uneven problem.
Existing method can not obtain the subsphaeroidal or oval prilling powder of narrow particle size distribution, pattern above, make it more or less to exist in the industrial production fill out powder uneven, fill out powder and leak the phenomenons such as material.
Summary of the invention
The object of the present invention is to provide a kind of extruder grain method of soft magnetic powder, improve apparent density and the mobility of prilling powder.
In order to reach above-mentioned object, the invention provides a kind of extruder grain method of soft magnetic powder, it uses Squeezinggranulator and the granulating disc with screen cloth, and the method comprises step: soft magnetic powder and adhesive solution mix and stir by (1); (2) soft magnetic powder mixed and adhesive solution are dropped into feed bin; (3) extruder grain is carried out; And (4) carry out disc granulation.
In an aspect, method of the present invention is more contained in the screw of powder through a material-receiving system of above-mentioned steps (3) extruder grain acquisition.
Wherein, material-receiving system is such as inverted rescinded angle circular cone cell body, and material-receiving system is rotated by the motor being placed in center, makes to be spinned immediately motion by the first prilling powder of screen cloth.
In an aspect, disc granulation is rotary motion or centrifugal motion.
In an aspect, a humidifier is installed for make-up diluent to soft magnetic powder above granulating disc, thus the soft or hard state on adjustment soft magnetic powder surface.
In an aspect, granulating disc has a disk, and this disk is at central rotation or eccentric rotary.
Wherein, the disk of granulating disc has oscillating movement simultaneously.
Wherein, the vibration of the disk of granulating disc can be simple vibration or ultrasonic vibration, or the complex vibration of simple vibration and ultrasonic vibration.
Wherein, the direction of vibration of the disk of granulating disc can be disk plane or perpendicular to disk plane.
In an aspect, the prilling powder mobility obtained by method of the present invention is less than or equal to 55 seconds, apparent density>=2.0g/cm
3.
The extruder grain method of soft magnetic powder of the present invention, makes prilling powder have the subsphaeroidal or oval feature of narrow particle size distribution, pattern simultaneously, thus fundamentally improves apparent density and the mobility of prilling powder.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the extruder grain method of soft magnetic powder of the present invention.
The device systems schematic diagram that the extruder grain method that Fig. 2 is soft magnetic powder of the present invention uses.
Fig. 3 is the operational flowchart of the extruder grain method of soft magnetic powder of the present invention.
Wherein, Reference numeral:
20 Squeezinggranulators
202 screen clothes
204 fixed mechanisms
206 pressing mechanisms
208 receiving mechanisms
22 material-receiving systems
222 motors
224 air inlets
226 gas outlets
24 granulating discs
242 disks
30 materials mixed
32 first prilling powders
S10 ~ S18 step
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate graphic being described as follows, but institute's accompanying drawings only provides reference and explanation use, is not used for being limited the present invention.
Please refer to shown in Fig. 1, Fig. 1 is the flow chart of steps of the extruder grain method of soft magnetic powder of the present invention.The invention provides a kind of extruder grain method of soft magnetic powder, it uses Squeezinggranulator and the granulating disc with screen cloth, and the method comprises step: S10, and soft magnetic powder and adhesive solution are mixed and stirred; S12, drops into feed bin by the soft magnetic powder mixed and adhesive solution; S14, carries out extruder grain; S16, the powder that extruder grain obtains is through the screw of a material-receiving system; And S18, carry out disc granulation.
Then, please refer to Fig. 2, the device systems schematic diagram that the extruder grain method that Fig. 2 is soft magnetic powder of the present invention uses.The device systems that the extruder grain method of soft magnetic powder of the present invention uses comprises and has Squeezinggranulator 20, material-receiving system 22 and granulating disc 24.The basic structure of Squeezinggranulator 20 is made up of screen cloth 202 and fixed mechanism 204 thereof, pressing mechanism 206, receiving mechanism 208, and wherein screen cloth 202 and fixed mechanism 204 thereof are core institutions, and the specification of screen cloth 202 determines the particle size range of prilling powder.Material-receiving system 22 is such as inverted rescinded angle circular cone cell body, and material-receiving system 22 is rotated by the motor 222 being placed in center, makes to be spinned immediately motion by the first prilling powder of screen cloth 202.Material-receiving system 22 more can comprise air inlet 224 and gas outlet 226, imports gas and carries out air blowing rotating granulation.Granulating disc 24 has disk 242, and the motion of disk 242 can be rotate or eccentric rotary extraneous vibration even simultaneously, and vibration can be simple vibration or ultrasonic vibration, and direction of vibration can be disk plane or perpendicular to disk plane; Through disk post exercise prilling powder pattern can be improved significantly, the corner angle on surface are eliminated substantially, and simultaneously surface becomes smooth.
Then, please refer to Fig. 3, Fig. 3 is the operational flowchart of the extruder grain method of soft magnetic powder of the present invention.The present invention needs the advantage in conjunction with extruder grain and disc granulation, avoids surface material loss simultaneously again, mixes the shortcomings such as uneven, therefore need to experience following step:
First, weigh a certain amount of adhesive (being generally the 1.0-5.0wt% of powder weight), and be made into adhesive solution with corresponding diluent, amount of diluent is generally the 3.0-15.0% of powder weight, adhesive is generally organic polymer resin, such as phenolic resins, epoxy resin, polyamide and special engineering resin etc.; Then, will the metal dust of granulation be needed to mix with adhesive solution and stir, till fully mixing.
In order to obtain the prilling powder of narrow particle size distribution, first the material 30 mixed must be forced through screen cloth by mechanical force in Squeezinggranulator, the screen cloth specification between 20 order-100 orders can be selected as required.The basic structure of Squeezinggranulator 20 is made up of screen cloth 202 and fixed mechanism 204 thereof, pressing mechanism 206, receiving mechanism 208, and wherein screen cloth and fixed mechanism thereof are core institutions, and the specification of screen cloth determines the particle size range of prilling powder.Concrete grammar is first by the 1-5% that the diluent of the material be stirred residue content controls in powder weight, then to be put into by this material in Squeezinggranulator and to open pressing mechanism, being dropped in material-receiving system 22 by the first prilling powder 32 of screen cloth.
Be generally cuboid through first prilling powder 32 pattern, its surface has obvious corner angle, and its pattern therefore will be made to change; The present invention is reached by transformation material-receiving system 22, specifically material-receiving system 22 is inverted rescinded angle circular cone cell body, this inverted rescinded angle circular cone cell body is rotated by the motor 222 being placed in center, make to be spinned immediately motion by the first prilling powder 32 of screen cloth 202, such one side can improve the pattern of first prilling powder 32, and prilling powder can be avoided on the other hand to reunite or stick wall; Afterwards, thrown away in order from material-receiving system 22 through the first prilling powder 32 of screw and fallen into the disk 242 of the High Rotation Speed of below granulating disc 24, the motion of disk 242 can be rotate or eccentric rotary extraneous vibration even simultaneously, vibration can be simple vibration or ultrasonic vibration, and direction of vibration can be disk plane or perpendicular to disk plane; Through disk post exercise prilling powder pattern can be improved significantly, the corner angle on surface are eliminated substantially, and simultaneously surface becomes smooth; In this process can according to the dry wet degree make-up diluent of powder, concrete grammar in disk, sprays a certain amount of diluent by atomizer, object is that powder surface is softened, but can not be too much, otherwise the powder of granulation can be reunited at the even glutinous end together again.
Powder good for granulation being carried out baking makes it dry, generally will select suitable baking regime according to adhesive resin, and such as 60 DEG C-80 DEG C are toasted one hour; In addition, can add lubricant as required, lubricant content is generally the 0.1-1.0wt% of prilling powder weight, and lubricant can select stearic acid, stearate, paraffin etc.
Thus obtained prilling powder adopts Hall flowmeter to measure its mobility, and funnel adopts dew eye to be the funnel of 2mm, and its liquidity scale is: the time that the prilling powder of 50 grams needs is for being less than or equal to 55 seconds; The data adopting apparent density tester to obtain are>=2.0g/cm
3.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claims in the present invention.
Claims (10)
1. an extruder grain method for soft magnetic powder, is characterized in that, it uses Squeezinggranulator and the granulating disc with screen cloth, and the method comprises step:
(1) soft magnetic powder and adhesive solution are mixed and stir;
(2) soft magnetic powder mixed and adhesive solution are dropped in a feed bin;
(3) extruder grain is carried out; And
(4) disc granulation is carried out.
2. the extruder grain method of soft magnetic powder according to claim 1, is characterized in that, is more contained in the screw of powder through a material-receiving system of step (3) extruder grain acquisition.
3. the extruder grain method of soft magnetic powder according to claim 2, is characterized in that, this material-receiving system is inverted rescinded angle circular cone cell body.
4. the extruder grain method of soft magnetic powder according to claim 1, is characterized in that, this disc granulation is rotary motion or centrifugal motion.
5. the extruder grain method of soft magnetic powder according to claim 1, is characterized in that, installs a humidifier for make-up diluent to soft magnetic powder above this granulating disc, thus the soft or hard state on adjustment soft magnetic powder surface.
6. the extruder grain method of soft magnetic powder according to claim 1, is characterized in that, this granulating disc has a disk, and this disk is at central rotation or eccentric rotary.
7. the extruder grain method of soft magnetic powder according to claim 6, is characterized in that, the disk of this granulating disc has oscillating movement simultaneously.
8. the extruder grain method of soft magnetic powder according to claim 7, is characterized in that, the vibration of the disk of this granulating disc is simple vibration or ultrasonic vibration, or the complex vibration of simple vibration and ultrasonic vibration.
9. the extruder grain method of soft magnetic powder according to claim 7, is characterized in that, the direction of vibration of the disk of this granulating disc is disk plane or perpendicular to disk plane.
10. the extruder grain method of soft magnetic powder according to claim 1, is characterized in that, the prilling powder mobility obtained by the method is less than or equal to 55 seconds, apparent density>=2.0g/cm
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336080.8A CN105268980B (en) | 2014-07-15 | 2014-07-15 | The extruder grain method of soft magnetic powder |
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| CN201410336080.8A CN105268980B (en) | 2014-07-15 | 2014-07-15 | The extruder grain method of soft magnetic powder |
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| CN105268980A true CN105268980A (en) | 2016-01-27 |
| CN105268980B CN105268980B (en) | 2017-08-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834441A (en) * | 2016-04-20 | 2016-08-10 | 昆山磁通新材料科技有限公司 | Soft magnetic powder granulation method and device by using electromagnetic field to restrain motion trail of soft magnetic material |
| CN107552777A (en) * | 2017-09-05 | 2018-01-09 | 昆山玛冀电子有限公司 | A kind of powder particle composition and production technology for inductance production |
| CN107617736A (en) * | 2017-09-08 | 2018-01-23 | 张家港创博金属科技有限公司 | Metal-resin composite pellets preparation method and device |
| CN107695344A (en) * | 2017-09-08 | 2018-02-16 | 张家港创博金属科技有限公司 | Composition metal bead preparation method and device |
| CN114082367A (en) * | 2021-11-15 | 2022-02-25 | 山东金格瑞机械有限公司 | Granulator for organic fertilizer |
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| CN1056442A (en) * | 1991-06-12 | 1991-11-27 | 湖南省化学工业设计院 | Spherical granular barium carbonate industrial production method and prilling granulator |
| JPH06114256A (en) * | 1992-10-01 | 1994-04-26 | Ask:Kk | Powder granulated goods and production thereof |
| JP2000246084A (en) * | 1999-02-25 | 2000-09-12 | Okawara Mfg Co Ltd | Granulator |
| CN201006416Y (en) * | 2006-12-15 | 2008-01-16 | 刘玉忠 | Pelleting machine |
| JP2009279486A (en) * | 2008-05-20 | 2009-12-03 | Taiho Yakuhin Kogyo Kk | Extrusion granulator |
| CN103769596A (en) * | 2013-11-26 | 2014-05-07 | 王利民 | Method for preparing high-stacking-density oblate powder material |
| CN103768995A (en) * | 2014-01-28 | 2014-05-07 | 西安建筑科技大学 | Granulation method for ultrafine and nano soft magnetic ferrite powder |
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2014
- 2014-07-15 CN CN201410336080.8A patent/CN105268980B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1056442A (en) * | 1991-06-12 | 1991-11-27 | 湖南省化学工业设计院 | Spherical granular barium carbonate industrial production method and prilling granulator |
| JPH06114256A (en) * | 1992-10-01 | 1994-04-26 | Ask:Kk | Powder granulated goods and production thereof |
| JP2000246084A (en) * | 1999-02-25 | 2000-09-12 | Okawara Mfg Co Ltd | Granulator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834441A (en) * | 2016-04-20 | 2016-08-10 | 昆山磁通新材料科技有限公司 | Soft magnetic powder granulation method and device by using electromagnetic field to restrain motion trail of soft magnetic material |
| CN107552777A (en) * | 2017-09-05 | 2018-01-09 | 昆山玛冀电子有限公司 | A kind of powder particle composition and production technology for inductance production |
| CN107617736A (en) * | 2017-09-08 | 2018-01-23 | 张家港创博金属科技有限公司 | Metal-resin composite pellets preparation method and device |
| CN107695344A (en) * | 2017-09-08 | 2018-02-16 | 张家港创博金属科技有限公司 | Composition metal bead preparation method and device |
| CN114082367A (en) * | 2021-11-15 | 2022-02-25 | 山东金格瑞机械有限公司 | Granulator for organic fertilizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105268980B (en) | 2017-08-04 |
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