CN111251369A - Method for improving layering of graphite film die-cut finished product - Google Patents
Method for improving layering of graphite film die-cut finished product Download PDFInfo
- Publication number
- CN111251369A CN111251369A CN202010055053.9A CN202010055053A CN111251369A CN 111251369 A CN111251369 A CN 111251369A CN 202010055053 A CN202010055053 A CN 202010055053A CN 111251369 A CN111251369 A CN 111251369A
- Authority
- CN
- China
- Prior art keywords
- graphite film
- die
- finished product
- cut
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 140
- 239000010439 graphite Substances 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 34
- 230000032798 delamination Effects 0.000 claims description 12
- 238000010428 oil painting Methods 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000005411 Van der Waals force Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
Abstract
The invention relates to the field of graphite film die cutting, in particular to a method for improving layering of a graphite film die-cut finished product, which greatly improves layering of the graphite film die-cut finished product, thereby improving the yield of the product. The improved product can be applied to 3C products, and the requirement of rapid heat dissipation of electronic products is met. The improvement method mainly comprises the following steps: and pressing the edge of the graphite film die-cut finished product, and testing the treated product, wherein the graphite film die-cut finished product is not layered. The layering of the die-cut graphite film finished product after die cutting is always a common problem existing in a die cutting boundary, the layering problem frequently occurs, and the invention provides a quick solution for the problem. The invention has simple process and low production cost and energy consumption, and solves the problem of low yield caused by layering of the original graphite film die-cut finished product.
Description
Technical Field
The invention relates to the technical field of graphite film die cutting, in particular to a method for improving layering of a graphite film die cutting finished product.
Background
High heat conduction graphite heat dissipation membrane has become the indispensable component part of intelligent electronic equipment, like smart mobile phone, portable notebook computer, intelligent audio amplifier and intelligent VR wearing equipment etc.. With the advent of the 5G era, the chip integration of electronic devices has increased to meet the realization of multi-functionalization, so that the demand for heat dissipation will be higher and denser. The graphite film is a layered two-dimensional material structure and is formed by stacking Van der Waals force between layers, and the Van der Waals force between the layers is far smaller than sp in the graphite plane2Due to the covalent bonding force of the composition, the graphite film is easy to delaminate, but can bear large stress in the in-plane direction. In the field of graphite die cutting, graphite delamination always existsAnd troubles the stubborn diseases of the whole industry. Meanwhile, the characteristic of easy delamination of the graphite is determined by the layered structure of the graphite.
Therefore, the development of the method for improving the layering of the die-cut finished product of the graphite film can directly improve the yield of the graphite film during die cutting, so as to meet the requirement of electronic equipment on rapid heat dissipation and promote the development of intelligent industry; meanwhile, the method has great scientific and economic significance for promoting the precision processing of electronic materials and the high-speed development of the rapid heat dissipation technology in China.
Disclosure of Invention
The invention aims to provide a method for improving the layering of a graphite film die-cut finished product, which has the advantages of simple process, high efficiency, easy operation and low energy consumption and solves the layering problem caused by die cutting of a graphite film.
The technical scheme of the invention is as follows:
a method for improving delamination of a die-cut finished graphite film, comprising: after the graphite film is subjected to die cutting, redundant air at the edge covering position of a graphite film die-cut finished product is discharged, so that the upper edge covering and the lower edge covering are tightly attached along the edge of the graphite film.
Further, the method comprises the following steps:
(1) pressing the sharp end or sharp edge of the pressed object at the edge of the finished product die-cut by the graphite film for several times;
(2) and (3) sticking the graphite film die-cut finished product obtained after pressing on a flat plate, and pressing the whole finished product to ensure complete fitting.
Further, the graphite film adopted by the graphite film die-cutting finished product is a double-layer graphite film, and the thickness of each layer is 32 μm.
Furthermore, a pencil or bamboo and wood products similar to the pencil are used as a pressing object to press the edge of the graphite film die-cut finished product.
Furthermore, in the step (1), the number of times of edge covering pressing is 1-3, and the pressing strength is 0.6-1.5 MPa.
Further, in the step (2), a 2Kg oil painting roller is used for rolling back the die-cut graphite film finished product for 3 times.
Further, in the step (1), a cutting die which is consistent with the edge of the graphite film die-cut finished product in shape is used as a pressing object to perform sleeve position pressing on the edge of the graphite film die-cut finished product.
Further, the shape of the cutting die is amplified by 100.1-102% according to the shape of the edge of the graphite film die-cut finished product.
Further, the distance between the knife edge of the knife die and the bottom supporting film is set to be 50% -80% of the thickness of the graphite film part on the graphite film die-cut finished product.
The design idea of the invention is as follows:
the invention provides a method for improving layering of a graphite film die-cut finished product, which is characterized in that after the graphite film is die-cut, a pencil with a tip end, an object shaped like a pencil and provided with a sharp end or a knife mold (a knife edge on the knife mold is the sharp edge of the invention) is used for pressing the edge covering part of the graphite film die-cut finished product, redundant air at the edge covering part of the graphite film die-cut finished product is discharged, the upper and lower edges are tightly attached to the edge of the graphite film, so that the problem of layering of the die-cut graphite film die-cut finished product after die cutting is solved, the yield of the graphite film die-cut is greatly improved, the general problem of easy layering caused by the original graphite film during die cutting is solved, and the method is simple in process, high in efficiency, easy to operate and low in energy consumption, can be widely applied to die-cutting processes of different materials, improves the yield and reduces the cost.
The invention has the advantages and beneficial effects that:
1. the invention can solve the problem of layering of graphite film die-cut finished products by directly pressing the product wrapping edges, and the yield is improved to 85-100%.
2. The invention can directly add a wrapping sleeve position pressing station on the die cutting line, thereby realizing continuous production.
Detailed Description
The present invention will be described in further detail by way of examples, which all improve the lamination of die-cut finished products of double-layer graphite films after die cutting, wherein the thickness of each layer of graphite film in the double-layer graphite film is 32 μm.
Example 1
The layering method for the die-cut finished product of the graphite film is as follows:
selecting and taking out the die-cut finished product of the graphite film judged to be layered, and fixing the die-cut finished product on a flat operating platform; pressing for 2 times by using a 2B pencil with a tip along the edge of the graphite film die-cut finished product, wherein the pressing strength is 0.8 MPa; the improved graphite film die-cut finished product and the non-improved graphite film die-cut finished product are stuck on a flat steel plate and rolled back and forth for 3 times by using a 2Kg oil painting roller, so that the whole graphite film die-cut finished product is ensured to be completely attached.
Tearing off a graphite film die-cut finished product protective film, wherein the graphite film without press binding is seriously layered, and the graphite film after press binding is not layered; the improvement rate of graphite film delamination is 100%.
Example 2
The method for improving layering of the graphite film die-cut finished product in the embodiment comprises the following steps:
selecting and taking out a graphite film die-cut finished product judged to be layered, placing the graphite film die-cut finished product in front of a sleeve position pressing station at the end of a die tangent line, and performing sleeve position pressing on a finished product edge covering by using a cutting die consistent with the finished product edge covering, wherein the shape of the cutting die is only enlarged to 102% in size compared with the shape of the finished product edge covering, and the distance between the edge of the cutting die and a bottom supporting film is set to be 50% of the total thickness of the graphite film, namely 32 mu m; opening a die cutting production line, and carrying out a sleeve position pressing procedure on a layered graphite film die-cut finished product, wherein the pressure of a sleeve position pressing station is 1.5 MPa; and (3) sticking the improved graphite film die-cut finished product and the non-improved graphite film die-cut finished product on a flat steel plate, and rolling the improved graphite film die-cut finished product and the non-improved graphite film die-cut finished product back and forth for 1 time by using a 2Kg oil painting roller, so that the whole graphite film die-cut finished product is ensured to be completely attached.
Tearing off the graphite film die-cut finished product protective film, wherein the graphite film without press edge covering is seriously layered, and the graphite film after press edge covering treatment is hardly layered; the layering improvement rate of the graphite film is 95 percent
Example 3
The method for improving layering of the graphite film die-cut finished product in the embodiment comprises the following steps:
selecting and taking out the graphite film die-cut finished product judged to be layered, and placing the graphite film die-cut finished product in front of a sleeve position pressing station at the end of a die cutting line; opening a die cutting production line, and performing a sleeve position pressing process on a laminated graphite film die-cut finished product as described in embodiment 2 once, wherein the sleeve position pressing pressure in the embodiment is 0.6MPa, the adopted shape of the cutting die is only expanded to 100.1% in size compared with the shape of a finished product edge and the shape of the finished product edge, and the distance between the edge of the cutting die and the bottom supporting film is set to be 80% of the total thickness of the graphite film, namely 51.2 μm; and (3) sticking the improved graphite film die-cut finished product and the non-improved graphite film die-cut finished product on a flat steel plate, and rolling the improved graphite film die-cut finished product back and forth for 2 times by using a 2Kg oil painting roller to ensure that the whole graphite film die-cut finished product is completely attached.
Tearing off a graphite film die-cut finished product protective film, seriously layering the graphite film without pressing the edge, and layering a small part of the graphite film after the pressing edge; the improvement rate of graphite film delamination is 85 percent
Example 4
The method for improving layering of the graphite film die-cut finished product in the embodiment comprises the following steps:
selecting and taking out the die-cut finished product of the graphite film judged to be layered, and fixing the die-cut finished product on a flat operating platform; pressing the bamboo product rod with the tip along the edge of the graphite film die-cut finished product for 3 times, wherein the pressing strength is 0.9 MPa; and (3) sticking the improved graphite film die-cut finished product and the non-improved graphite film die-cut finished product on a flat steel plate, and rolling the improved graphite film die-cut finished product back and forth for 3 times by using a 2Kg oil painting roller to ensure that the whole graphite film die-cut finished product is completely attached.
Tearing off a graphite film die-cut finished product protective film, wherein the graphite film without press binding is seriously layered, and the graphite film after press binding is not layered; the improvement rate of graphite film delamination is 100%.
Example 5
The method for improving layering of the graphite film die-cut finished product in the embodiment comprises the following steps:
selecting and taking out the die-cut finished product of the graphite film judged to be layered, and fixing the die-cut finished product on a flat operating platform; pressing the wooden article rod with the tip for 3 times along the edge of the graphite film die-cut finished product, wherein the pressing strength is 1.2 MPa; and (3) sticking the improved graphite film die-cut finished product and the non-improved graphite film die-cut finished product on a flat steel plate, and rolling the improved graphite film die-cut finished product back and forth for 3 times by using a 2Kg oil painting roller to ensure that the whole graphite film die-cut finished product is completely attached.
Tearing off a graphite film die-cut finished product protective film, wherein the graphite film without press binding is seriously layered, and the graphite film after press binding is not layered; the improvement rate of graphite film delamination is 100%.
According to the method for improving the layering of the graphite film die-cut finished product, after the graphite film is die-cut, the edge covering position of the graphite film die-cut finished product is pressed by using a pencil with a pointed end, an object shaped like a pencil and provided with a sharp end or a cutting die directly, so that redundant air at the edge covering position of the graphite film die-cut finished product is discharged, the graphite film die-cut finished product is pressed, the layering of the graphite film after the die-cut is greatly improved, the yield of the graphite film die-cut finished product is improved, and the yield is increased to 85-100%.
The invention solves the problem of easy delamination caused by die cutting of the original graphite film, and can directly add a wrapping position pressing station on the die cutting line, thereby realizing continuous production; the process is simple, the efficiency is high, the operation is easy, the energy consumption is low, the method can be widely applied to die cutting processes of different materials, the yield is improved, and the cost is reduced.
Claims (9)
1. A method for improving layering of graphite film die-cut finished products is characterized by comprising the following steps: after the graphite film is subjected to die cutting, redundant air at the edge covering position of a finished product subjected to die cutting of the graphite film is discharged, so that the upper edge covering and the lower edge covering are tightly attached along the edge of the graphite film.
2. The method for improving lamination of die-cut graphite film as claimed in claim 1, comprising the steps of:
(1) pressing the sharp end or sharp edge of the pressed object at the edge of the finished product die-cut by the graphite film for several times;
(2) and (3) sticking the graphite film die-cut finished product obtained after pressing on a flat plate, and pressing the whole finished product to ensure complete fitting.
3. The method for improving the delamination of a die-cut graphite film product as claimed in claim 1, wherein the graphite film used for die-cutting the graphite film product is a double-layer graphite film, and each layer has a thickness of 32 μm.
4. The method for improving the layering of the graphite film die-cut finished products as claimed in claim 2, wherein the edge of the graphite film die-cut finished products is pressed by using a pencil or bamboo and wood products shaped like the pencil as a pressing object.
5. The method for improving the layering of the graphite film die-cut finished product as claimed in claim 2, wherein in the step (1), the number of the edge-covering pressing is 1-3, and the pressing strength is 0.6-1.5 MPa.
6. The method for improving the delamination of graphite film die-cut products as claimed in claim 2, wherein in step (2), said products are back-rolled 3 times using 2Kg of oil painting roller.
7. The method for improving the delamination of the graphite film die-cut finished product as claimed in claim 2, wherein in the step (1), a cutting die in accordance with the shape of the edge of the graphite film die-cut finished product is used as a pressing object to perform the nesting pressing on the edge of the graphite film die-cut finished product.
8. The method for improving the delamination of a graphite film die-cut product as claimed in claim 6, wherein the shape of said cutting die is scaled up by 100.1-102% according to the shape of the edge of said graphite film die-cut product.
9. The method for improving the lamination of the graphite film die-cut finished product as claimed in claim 6, wherein the distance between the knife edge of the knife die and the bottom supporting film is set to be 50% -80% of the thickness of the graphite film part on the graphite film die-cut finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010055053.9A CN111251369B (en) | 2020-01-17 | 2020-01-17 | Method for improving layering of graphite film die-cut finished product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010055053.9A CN111251369B (en) | 2020-01-17 | 2020-01-17 | Method for improving layering of graphite film die-cut finished product |
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| Publication Number | Publication Date |
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| CN111251369A true CN111251369A (en) | 2020-06-09 |
| CN111251369B CN111251369B (en) | 2023-11-24 |
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| CN202010055053.9A Active CN111251369B (en) | 2020-01-17 | 2020-01-17 | Method for improving layering of graphite film die-cut finished product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111941533A (en) * | 2020-08-24 | 2020-11-17 | 苏州安洁科技股份有限公司 | Process for solving layering problem during graphene processing |
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| CN111251369B (en) | 2023-11-24 |
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