CN106231862B - The technique that electronic equipment conductive graphite piece is prepared based on carbon black - Google Patents
The technique that electronic equipment conductive graphite piece is prepared based on carbon black Download PDFInfo
- Publication number
- CN106231862B CN106231862B CN201610603043.8A CN201610603043A CN106231862B CN 106231862 B CN106231862 B CN 106231862B CN 201610603043 A CN201610603043 A CN 201610603043A CN 106231862 B CN106231862 B CN 106231862B
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- Prior art keywords
- carbon black
- conductive graphite
- graphite piece
- electronic equipment
- prepared based
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 49
- 239000010439 graphite Substances 0.000 title claims abstract description 49
- 239000006229 carbon black Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052742 iron Inorganic materials 0.000 claims abstract description 24
- 238000005087 graphitization Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 22
- 239000010813 municipal solid waste Substances 0.000 claims description 20
- 238000000605 extraction Methods 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000004898 kneading Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000011294 coal tar pitch Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000001976 improved effect Effects 0.000 abstract description 11
- 238000012545 processing Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000012797 qualification Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002390 adhesive tape Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
Abstract
The invention discloses the technique that electronic equipment conductive graphite piece is prepared based on carbon black, including 1）Raw material；2）Precomminution；3）Pre-screening；4）Except iron；5）Separating twice；6）Regrading；7）Mixing；8）Die mould and heating；9）High temperature graphitization；10）Gum；11）Cutting；The processing technology step is scientific and reasonable, the processing technology of the prior art is improved, the processing to become more meticulous to raw material, make its granularity more uniformity, the qualification rate of finished product is improved, and then improves the electric conductivity and thermal conductivity of conductive graphite piece, and its chemical stability can also be improved by the technique, its thermal expansivity is reduced, and easy processing is molded.
Description
Technical field
Conductive graphite piece more particularly to one kind the present invention relates to a kind of electronics field prepare electronics based on carbon black
The technique of equipment conductive graphite piece.
Background technology
Conductive graphite piece is a kind of completely new heat conduction and heat radiation material, along two square uniform heat conductions, shields heat source and component
The performance of consumption electronic product is improved simultaneously, and color is usually black, and material is that native graphite is processed by exquisite, thermal conductivity factor
In the horizontal direction be up to 1500W/M-K, using IC, CPU, MOS, LED, cooling fin, LCD-TV, laptop, communication apparatus,
Wireless exchange board, DVD, handheld device etc..
Conductive graphite piece has similary with metal even higher thermal conductivity and electric conductivity because of nonmetallic materials,
Its thermal conductivity is relatively better than aluminium foil or copper foil, but the conduction that conductive graphite piece is produced in existing production technology
Property and thermal conductivity reach best, essentially consist in the processing stage of raw material, in the prior art to the processing of conductive graphite tablet raw material not
It enough becoming more meticulous, causes to contain more impurity component in its raw material so that the quality of conductive graphite piece that final production goes out is not high enough,
Qualification rate reduces, and can influence its preferable electric conductivity and thermal conductivity.
Invention content
In view of the above problems, the present invention is intended to provide preparing the work of electronic equipment conductive graphite piece based on carbon black
Skill, the processing technology step is scientific and reasonable, and the processing technology of the prior art is improved, the place to become more meticulous to raw material
Reason, makes its granularity more uniformity, improves the qualification rate of finished product, and then improves the electric conductivity of conductive graphite piece and lead
It is hot, and its chemical stability can also be improved by the technique, its thermal expansivity is reduced, and easy processing is molded.
To achieve these goals, the technical solution adopted in the present invention is as follows：
The technique that electronic equipment conductive graphite piece is prepared based on carbon black, is included the following steps：
1）Raw material：Choose raw material of the carbon black as conductive graphite piece；
2）Precomminution：Above-mentioned carbon black is crushed to the medium size of 60-80mm in advance through crushing plant；
3）Pre-screening：It is above-mentioned to be sieved through broken carbon black by vibrating screen, remove larger particles impurity in carbon black；
4）Except iron：Carbon black through crushing, which is placed in trash separator, operated except iron；
5）Separating twice：Carbon black through removing iron completion is ground into small of grain diameter for 0.3-0.5mm through crushing plant
Grain；
6）Regrading：Carbon black little particle through separating twice carries out three level screen respectively by screening plant, filters out
Particle of the same size comes out；
7）Mixing：Carbon black little particle and adhesive are subjected to kneading, form mixture；
8）Die mould and heating：In a mold by above-mentioned mixture compression moulding, square sheet shape is pressed into, thickness exists
Between 0.01-0.02mm, conductive graphite piece green body is formed, heating pipe is set in mold, by heating pipe to being pressed into
The conductive graphite piece green body of type is tentatively heated, and heating and temperature control is between 200-300 DEG C, heating time 30min；
9）High temperature graphitization：Conductive graphite piece green body through above-mentioned heating is fed directly to carry out high temperature in high temperature graphitization stove
Graphitization operation；
10）Gum：Conductive graphite piece after high temperature graphitization is cooled to heat-resisting in one layer of its bottom surface coating at 50-60 DEG C
Double faced adhesive tape, and adhere to one layer of release paper in conductive graphite piece bottom surface；
11）Cutting：Conductive graphite piece green body after gum forms the conductive graphite piece of finished product, and cooling down, and then
The size of needs is cut by cutting equipment.
Preferably, the step（4）In trash separator include trash extraction box, feed inlet, discharge port and spiral agitator,
Iron plate is removed, and net is additionally provided at the feed inlet of the trash extraction box for vertically arranged at least one piece at the feed inlet of the trash extraction box
Sieve uniform distributor.
Preferably, setting rotary open type cover at the feed inlet, described rotary open type cover one end is certainly
By holding, the other end is hingedly connected to by articulated shaft on the babinet of the trash extraction box.
Preferably, the step（6）Three level screen is respectively through 400 mesh, 200 mesh and 100 mesh by carbon black little particle
Mesh screen carries out three level screen.
Preferably, the step（7）Middle carbon black little particle is with adhesive with 5:1 ratio carries out kneading, wherein bonding
Agent is coal tar pitch.
The beneficial effects of the invention are as follows：It is compared with prior art, of the invention to the improvement is that,
First, adding except iron operates, because containing the impurity such as irony in the raw material of crushing, therefore need through trash separator in it
The impurity in portion is purged, and can improve the purity of raw material in this way, and then improve the quality of processing, electric conductivity and thermal conductivity also can
With raising, also removing the iron impurities in raw material can prevent from being aoxidized during following process；
Second, increasing the screening stage, sieve adding for stage and the uniformity for finally improving raw material had a very big impact,
Mentality of designing of the present invention is sieved by three-level sieve, can be thus further ensured that the uniformity of raw material degree, be improved into
Product rate；
Third, the present invention also sets up die mould and heating before high temperature graphitization, heated immediately after the completion of die mould,
It is the transition carried out before high temperature graphitization, the efficiency of high temperature graphitization can be improved in this way and entered after reducing die mould
Gap in high temperature graphitization stove；
Fourth, using the gum processing method under keeping warm mode, the activity of glue molecule is improved, gum can not only be improved
Effect, and gum efficiency can also be improved, and then improve the adhesiving effect of conductive graphite piece and circuit board etc..
Specific embodiment
In order to which those of ordinary skill in the art is made to be better understood on technical scheme of the present invention, with reference to embodiment
Technical scheme of the present invention is further described.
The technique that electronic equipment conductive graphite piece is prepared based on carbon black, is included the following steps：
1）Raw material：Choose raw material of the carbon black as conductive graphite piece；
2）Precomminution：Above-mentioned carbon black is crushed to the medium size of 60-80mm in advance through crushing plant, because of carbon raw material
Granularity is excessive, not only can not guarantee the uniform quality after calcining in calcination process, but also is influenced by calciner, pair plus
Material and discharge cause difficulty, and guarantee can subsequently realize that depth is calcined；
3）Pre-screening：It is above-mentioned to be sieved through broken carbon black by vibrating screen, remove larger particles impurity in carbon black；
4）Except iron：Carbon black through crushing, which is placed in trash separator, operated except iron；
Trash separator includes trash extraction box, feed inlet, discharge port and spiral agitator, is erected at the feed inlet of the trash extraction box
Iron plate is removed, and mesh screen uniform distributor is additionally provided at the feed inlet of the trash extraction box at least one piece to setting, in the charging
Rotary open type cover is set at mouthful, and described rotary open type cover one end is free end, and the other end is hingedly connected by articulated shaft
It is connected on the babinet of the trash extraction box, the mesh of mesh screen uniform distributor is 60 or 80 mesh, in this way by by the particle of precomminution
Shape raw material enters mesh screen uniform distributor and is spread out uniform blanking, and the particle of blanking will spread out, convenient for impurity is inhaled
On except iron plate；
Except iron plate be vertically set up in parallel in trash extraction box it is multiple, each two remove iron plate between be set as blanking channel, pre- powder
Broken particle is inhaled iron impurities on except iron plate by removing iron plate during blanking, and from throat-fed because of cover
For rotary open type cover, therefore when reaching certain thickness except iron, cover is opened, is periodically cleared up removing iron plate, in order to avoid
Dust removal rate and effect are influenced, cover is arranged to rotary open type cover simply, conveniently, can quickly realize the cleaning except iron plate
Installation operation；
5）Separating twice：Carbon black through removing iron completion is ground into small of grain diameter for 0.3-0.5mm through crushing plant
Grain；
6）Regrading：Carbon black little particle through separating twice carries out three level screen respectively by screening plant, filters out
Particle of the same size comes out, three level screen, is to carry out carbon black little particle through 400 mesh, 200 mesh and 100 mesh mesh screens respectively
Three level screen；Adding for screening stage has a very big impact the uniformity for finally improving raw material, and mentality of designing of the present invention is
It is sieved by three-level sieve, can thus be further ensured that the uniformity of raw material degree, improve yield rate；
7）Mixing：Carbon black little particle and adhesive are subjected to kneading, form mixture, carbon black little particle is with adhesive with 5:
1 ratio carries out kneading, and wherein adhesive is coal tar pitch；
8）Die mould and heating：In a mold by above-mentioned mixture compression moulding, square sheet shape is pressed into, thickness exists
Between 0.01-0.02mm, conductive graphite piece green body is formed, heating pipe is set in mold, by heating pipe to being pressed into
The conductive graphite piece green body of type is tentatively heated, and heating and temperature control is between 200-300 DEG C, heating time 30min；This hair
It is bright that die mould and heating are also set up before high temperature graphitization, it is heated immediately after the completion of die mould, is to carry out high temperature graphitization
A preceding transition can improve the efficiency of high temperature graphitization and enter in high temperature graphitization stove after reducing die mould in this way
Gap；
9）High temperature graphitization：Conductive graphite piece green body through above-mentioned heating is fed directly to carry out high temperature in high temperature graphitization stove
Graphitization operates, ranging from 1100-1200 DEG C of graphitization temperature in pyrographite stove, graphitization time 15-20min；
10）Gum：In order to preferably adhere to IC and circuit board, gum processing need to be carried out in conductive graphite on piece, through high temperature
One layer of heat-resisting double faced adhesive tape is coated, and in conductive graphite piece in its bottom surface when conductive graphite piece after graphitization is cooled to 50-60 DEG C
Bottom surface adheres to one layer of release paper；The present invention is the progress gum technique when conductive graphite piece temperature is down to a certain range, it is than normal
The advantage of temperature is that the bioactive molecule of heat-resisting double faced adhesive tape is enabled to increase, and preferably realizes double faced adhesive tape and release paper and conductive graphite
The bonding of piece improves gum effect and efficiency；
11）Cutting：Conductive graphite piece green body after gum forms the conductive graphite piece of finished product, and cooling down, and then
The size of needs is cut by cutting equipment.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. the technique that electronic equipment conductive graphite piece is prepared based on carbon black, which is characterized in that include the following steps：
1）Raw material：Choose raw material of the carbon black as conductive graphite piece；
2）Precomminution：Above-mentioned carbon black is crushed to the medium size of 60-80mm in advance through crushing plant；
3）Pre-screening：It is above-mentioned to be sieved through broken carbon black by vibrating screen, remove larger particles impurity in carbon black；
4）Except iron：Carbon black through crushing, which is placed in trash separator, operated except iron；
5）Separating twice：Carbon black through removing iron completion is ground into the little particle that grain diameter is 0.3-0.5mm through crushing plant；
6）Regrading：Carbon black little particle through separating twice carries out three level screen respectively by screening plant, filters out size
Consistent particle comes out；
7）Mixing：Carbon black little particle and adhesive are subjected to kneading, form mixture；
8）Die mould and heating：In a mold by above-mentioned mixture compression moulding, square sheet shape is pressed into, thickness is in 0.01-
Between 0.02mm, conductive graphite piece green body is formed, heating pipe in mold is set, compression moulding is led by heating pipe
Hot graphite flake green body is tentatively heated, and heating and temperature control is between 200-300 DEG C, heating time 30min；
9）High temperature graphitization：Conductive graphite piece green body through above-mentioned heating is fed directly to carry out pyrographite in high temperature graphitization stove
Change operation；
10）Gum：Conductive graphite piece after high temperature graphitization is cooled to heat-resisting two-sided in one layer of its bottom surface coating at 50-60 DEG C
Glue, and adhere to one layer of release paper in conductive graphite piece bottom surface；
11）Cutting：Conductive graphite piece green body after gum forms the conductive graphite piece of finished product, and cooling down, and then passes through
Cutting equipment cuts into the size of needs.
2. the technique according to claim 1 that electronic equipment conductive graphite piece is prepared based on carbon black, it is characterised in that：Institute
State step（4）In trash separator include trash extraction box, feed inlet, discharge port and spiral agitator, in the charging of the trash extraction box
Iron plate is removed, and mesh screen uniform distributor is additionally provided at the feed inlet of the trash extraction box for vertically arranged at least one piece at mouthful.
3. the technique according to claim 2 that electronic equipment conductive graphite piece is prepared based on carbon black, it is characterised in that：
Rotary open type cover is set at the feed inlet, and described rotary open type cover one end is free end, and the other end passes through hinged
Axis is hingedly connected on the babinet of the trash extraction box.
4. the technique according to claim 1 that electronic equipment conductive graphite piece is prepared based on carbon black, it is characterised in that：Institute
State step（6）Three level screen is that carbon black little particle is carried out three level screen through 400 mesh, 200 mesh and 100 mesh mesh screens respectively.
5. the technique according to claim 1 that electronic equipment conductive graphite piece is prepared based on carbon black, it is characterised in that：Institute
State step（7）Middle carbon black little particle is with adhesive with 5:1 ratio carries out kneading, and wherein adhesive is coal tar pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610603043.8A CN106231862B (en) | 2016-07-28 | 2016-07-28 | The technique that electronic equipment conductive graphite piece is prepared based on carbon black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610603043.8A CN106231862B (en) | 2016-07-28 | 2016-07-28 | The technique that electronic equipment conductive graphite piece is prepared based on carbon black |
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| Publication Number | Publication Date |
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| CN106231862A CN106231862A (en) | 2016-12-14 |
| CN106231862B true CN106231862B (en) | 2018-06-19 |
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| CN113444499B (en) * | 2021-06-25 | 2022-03-11 | 深圳市三科斯电子材料有限公司 | Double-sided adhesive high-thermal-conductivity synthetic graphite flake and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214945A (en) * | 2007-12-26 | 2008-07-09 | 东华大学 | Method for preparing high-strength thermal insulation asphalt carbon foam material |
| TW201422524A (en) * | 2012-12-10 | 2014-06-16 | 國立清華大學 | Low-temperature manufacturing method and system for spheroidal graphite |
| CN104528693A (en) * | 2009-05-26 | 2015-04-22 | 创业发展联盟技术有限公司 | Carbon material and method for producing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730680B (en) * | 2012-07-23 | 2014-12-03 | 清华大学深圳研究生院 | High-density high-rigidity graphene porous carbon material as well as preparation method and applications thereof |
| CN103805144B (en) * | 2014-03-04 | 2016-06-29 | 中国科学院宁波材料技术与工程研究所 | A kind of Graphene heat conducting film and preparation method thereof |
| US9957163B2 (en) * | 2014-06-12 | 2018-05-01 | Board Of Regents, The University Of Texas System | Method for manufacturing of three-dimensional freestanding porous thin-graphite with hierarchical porosity |
| CN105419095B (en) * | 2015-12-21 | 2018-03-02 | 赵社涛 | A kind of production method of carbon black composite powder material |
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- 2016-07-28 CN CN201610603043.8A patent/CN106231862B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214945A (en) * | 2007-12-26 | 2008-07-09 | 东华大学 | Method for preparing high-strength thermal insulation asphalt carbon foam material |
| CN104528693A (en) * | 2009-05-26 | 2015-04-22 | 创业发展联盟技术有限公司 | Carbon material and method for producing the same |
| TW201422524A (en) * | 2012-12-10 | 2014-06-16 | 國立清華大學 | Low-temperature manufacturing method and system for spheroidal graphite |
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Effective date of registration: 20191218 Address after: No. 36, Baima Industrial Park, Gaogang District, Taizhou City, Jiangsu Province Patentee after: Lu Jing Address before: 241006 Anhui Province, Wuhu City Economic Development Zone East Ouyang Hu Lu No. 28 Patentee before: WUHU MITEC Co.,Ltd. |
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Effective date of registration: 20200514 Address after: 033000 Dongxu Shangzhuang village, Xiaoyi City, Luliang City, Shanxi Province Patentee after: Xiaoyi Xin'an pigment carbon black Co.,Ltd. Address before: No. 36, Baima Industrial Park, Gaogang District, Taizhou City, Jiangsu Province Patentee before: Lu Jing |
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Address after: 032300 Dong Xu Shang Zhuang Cun, Xiaoyi City, Luliang City, Shanxi Province Patentee after: Xiaoyi Xin'an pigment New Material Co.,Ltd. Address before: 033000 Dongxu Shangzhuang village, Xiaoyi City, Luliang City, Shanxi Province Patentee before: Xiaoyi Xin'an pigment carbon black Co.,Ltd. |
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Effective date of registration: 20230615 Address after: 032300 Shengxihu Subdistricts of China, Xiaoyi City, Lvliang, Xiaoyi, Shanxi Province Patentee after: Lvliang Black Cat New Material Co.,Ltd. Address before: 032300 Dong Xu Shang Zhuang Cun, Xiaoyi City, Luliang City, Shanxi Province Patentee before: Xiaoyi Xin'an pigment New Material Co.,Ltd. |
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