CN113865357B - Production jig for artificial graphite film coiled material and process for producing artificial graphite film coiled material by using production jig - Google Patents
Production jig for artificial graphite film coiled material and process for producing artificial graphite film coiled material by using production jig Download PDFInfo
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- CN113865357B CN113865357B CN202111316744.0A CN202111316744A CN113865357B CN 113865357 B CN113865357 B CN 113865357B CN 202111316744 A CN202111316744 A CN 202111316744A CN 113865357 B CN113865357 B CN 113865357B
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- cylinder
- coiled material
- artificial graphite
- graphite film
- jig
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- 239000000463 material Substances 0.000 title claims abstract description 55
- 229910021383 artificial graphite Inorganic materials 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009423 ventilation Methods 0.000 claims abstract description 25
- 229920001721 polyimide Polymers 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 238000003763 carbonization Methods 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000003490 calendering Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000000630 rising effect Effects 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010000 carbonizing Methods 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 7
- 238000005087 graphitization Methods 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 abstract 1
- 239000004642 Polyimide Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
Abstract
The invention discloses a production jig for an artificial graphite film coiled material, which consists of a first cylinder and a second cylinder, wherein an inner cavity enclosed by the first cylinder and the second cylinder forms a containing cavity; the end faces of the first cylinder and the second cylinder are respectively provided with a bottom plate with a limit nut, the first cylinder, the bottom plate and the second cylinder are respectively provided with a ventilation round hole, the first cylinder is provided with a limit tip, and the second cylinder is provided with a limit notch. The invention also discloses a process for producing the artificial graphite film coiled material by using the jig, which comprises the following steps of 1) winding a polyimide film in a containing cavity; cutting a rectangular hole in the coiled material and placing the rectangular hole in the limit pin; 2) Feeding the jig into a carbonization furnace for treatment to obtain a carbon film coiled material; 3) The coiled material extends to the outer ring of the jig through the limiting notch, and then is sent into a graphitization furnace for treatment to obtain a graphite film coiled material; 4) Uncoiling and receiving materials; 5) And (5) calendaring. The accommodating cavity of the production jig can be fully utilized, and the apparent obvious defect can be greatly reduced by using the accommodating cavity to fire the artificial graphite film in combination with the auxiliary structure.
Description
Technical Field
The invention belongs to the technical field of graphite film preparation, and particularly relates to a production jig of an artificial graphite film coiled material and a process for producing the artificial graphite film coiled material by using the production jig.
Background
The high-heat-conductivity artificial graphite film has excellent heat conduction and electric conduction performance, is commonly used for heat dissipation parts of semiconductor elements or other heating parts loaded in various electronic equipment such as computers, mobile phones and the like, and has very wide application prospect in heat management in the fields of microelectronic packaging and integration. In the preparation process of the high-heat-conductivity artificial graphite film, the polyimide film is required to be put into a production jig for carbonization and graphitization. At present, two manufacturing methods of high-heat-conductivity artificial graphite films mainly exist, and one manufacturing method is that a polyimide film sheet is clamped between graphite papers and sequentially stacked in a sintering tool to be carbonized and graphitized for firing. The manufacturing mode has low space utilization rate and greatly influences the productivity. In addition, polyimide film sheets at different positions are stressed with larger difference, so that the foaming thickness of the graphite film is uneven, and the product performance is affected. Another is a manufacturing method of high heat conduction artificial graphite film coiled material, which is to divide the polyimide film into polyimide coiled materials with certain width and length, then wind the polyimide coiled materials on a graphite cylinder of a production jig for carbonization graphitization firing. Because the manufacturing method overcomes the defect of sheet firing, manufacturers have gradually changed to manufacturing methods of high-heat-conductivity artificial graphite film coiled materials. However, from the assembly mode of the polyimide coiled material in the production jig at present, certain defects still exist. The polyimide coiled material is carbonized, graphitized and expanded in the accommodating cavity of the production jig, is extremely easy to be limited by the volume of the accommodating cavity to generate a folding phenomenon, and causes the problems of uneven appearance of the high-heat-conductivity artificial graphite film and the like. If the length of the polyimide coiled material is reduced, the problems can be solved, but the space utilization rate is insufficient, and the production capacity is reduced. Therefore, it is necessary to design a production jig which can fully utilize the volume of the accommodating cavity and simultaneously burn the high-heat-conductivity artificial graphite film without apparent obvious defects.
Disclosure of Invention
Aiming at the defects and the problems in the prior art, the invention aims to provide a production jig for an artificial graphite film coiled material.
The invention is realized by the following technical scheme:
the invention provides a production jig for an artificial graphite film coiled material, which consists of a first cylinder and a second cylinder, wherein the second cylinder is sleeved on the periphery of the first cylinder, and an inner cavity enclosed by the first cylinder and the second cylinder forms an artificial graphite film coiled material accommodating cavity;
a bottom plate with a limit nut I is arranged on one end face of the first cylinder, a plurality of uniformly distributed ventilation round holes I are formed in the radial direction of the first cylinder body, a plurality of uniformly distributed ventilation round holes II are formed in the bottom plate of the first cylinder, and a row of uniformly distributed outwards-protruding limit pins are arranged in the radial direction of the first cylinder body;
a bottom plate with a limit nut II is arranged on one end face of the second cylinder, a plurality of uniformly distributed ventilation round holes III are formed in the radial direction of the second cylinder body, and limit gaps are formed in the radial direction of the second cylinder body;
still include with stop nut I, stop nut II homogeneous phase matched's stop bolt, through stop bolt's both ends respectively with stop nut I, stop nut II combine together, and then with first drum and second drum connection, restriction first drum and second drum's transverse movement distance.
Further, the ventilation round holes I and III are arranged in 4-8 rows, and the diameters of the ventilation round holes I and III are 2-5mm.
Further, the number of the ventilation round holes II is 4-8, and the diameter of the ventilation round holes II is 2-10mm.
Further, the number of the limit pins is 2-4, and the length of the limit pins is 5-10mm.
Further, the width of the limit notch is 2-5mm.
The invention also provides a process for producing the artificial graphite film coiled material by using the graphite film coiled material jig, which comprises the following steps:
1) And (3) coiled material assembly: winding a polyimide film in a containing cavity surrounded by a first cylinder and a second cylinder, wherein the void ratio is 40% -90%; one end of the polyimide film coiled material, which is close to the first cylinder, is cut into a rectangular hole and is placed in the limit pin of the first cylinder.
2) Carbonizing: and (3) feeding the jig for winding the polyimide film in the step (1) into a carbonization furnace for carbonization treatment. Carbonizing under the condition of the vacuum degree of the furnace chamber of 1-50Pa according to the following program: raising the temperature to 480-500 ℃ at a heating rate of 1-6 ℃/min, and preserving the heat for 0.5-1 h; raising the temperature to 600-700 ℃ at a heating rate of 0.5-2 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 1000-1400 ℃ at a heating rate of 0.5-4 ℃/min, and preserving the heat for 0.5-1 h. Cooling to room temperature to obtain the carbon film coiled material.
3) Graphitizing: extending one end of the carbon film coiled material prepared in the step 2) close to the second cylinder to the outer ring of the jig through the second cylinder limiting notch; feeding the jig for winding the carbon film into a graphitizing furnace for graphitizing treatment; graphitization is carried out under the protection of flowing argon gas according to the following procedure: rising the temperature rising rate of 20 ℃/min to 1000 ℃; raising the temperature rising rate of 4-6 ℃/min to 1800-2000 ℃, and preserving heat for 0.5-1 h; raising the temperature to 2700-2850 ℃ at the heating rate of 3-5 ℃/min, and preserving the heat for 0.5-1 h. Cooling to room temperature to obtain the graphite film coiled material.
4) Uncoiling and receiving materials.
5) And (5) calendaring.
Compared with the prior art, the invention has the beneficial effects that:
(1) The accommodating cavity of the production jig is surrounded by the first cylinder and the second cylinder, so that the accommodating cavity can be fully utilized, and meanwhile, the apparent obvious defects can be greatly reduced by using the accommodating cavity to fire the artificial graphite film through auxiliary structures such as the limiting pins, the ventilation round holes, the limiting gaps and the like.
(2) According to the invention, the first cylinder limiting pin is used for limiting the transverse movement caused by expansion or contraction of the inner ring end of the coiled material;
the expansion of the outer ring end of the coiled material is given enough transverse movement space through the second cylinder limiting notch; the arrangement of the ventilation round holes is beneficial to the decomposition and exhaust of polyimide coiled materials.
(3) The artificial graphite film coiled material prepared by adopting the production jig has the advantages of extremely simple process, easy operation and low cost, and is suitable for industrial mass production.
Drawings
FIG. 1 is a cross-sectional view of an artificial graphite film coil production fixture of the present invention.
Fig. 2 is a top view of the artificial graphite film coil production jig of the present invention.
Fig. 3 is a schematic front view of a first cylinder of the artificial graphite film coil production jig of the present invention.
Fig. 4 is a schematic top view of a first cylinder of the artificial graphite film coil production tool of the present invention.
Fig. 5 is a schematic front view of a second cylinder of the artificial graphite film coil production jig of the present invention.
Fig. 6 is a schematic top view of a second cylinder of the artificial graphite film coil production tool of the present invention.
Illustration of: 100-a first cylinder; 101-limiting nuts I; 102-ventilation round hole I; 103-ventilation round hole II; 104-limiting pins; 105-limit bolts; 200-a second cylinder; 201-limit nut II; 202-ventilation round hole III; 203-limit notch.
In the description of the present invention, the orientation or positional relationship indicated by the terms "radial", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected; may be a mechanical connection, an electrical connection; can be directly connected with each other or indirectly connected with each other through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in detail by those skilled in the art.
Detailed Description
The invention will be further described with reference to the accompanying drawings, which are simplified schematic illustrations of the basic structure of the invention, which are merely illustrative, and which therefore show only the structures that are relevant to the invention.
As shown in fig. 1-6, fig. 1 is a cross-sectional view of an artificial graphite film coil production fixture of the present invention. Fig. 2 is a top view of the artificial graphite film coil production jig of the present invention. Fig. 3 is a schematic front view of a first cylinder of the artificial graphite film coil production jig of the present invention. Fig. 4 is a schematic top view of a first cylinder of the artificial graphite film coil production tool of the present invention. Fig. 5 is a schematic front view of a second cylinder of the artificial graphite film coil production jig of the present invention. Fig. 6 is a schematic top view of a second cylinder of the artificial graphite film coil production tool of the present invention.
A production jig for artificial graphite film coiled materials comprises a first cylinder 100 and a second cylinder 200, wherein the second cylinder 200 is sleeved on the periphery of the first cylinder 100, and an inner cavity enclosed by the first cylinder 100 and the second cylinder 200 forms an artificial graphite film coiled material accommodating cavity.
A bottom plate with a limit nut I101 is arranged on one end face of the first cylinder 100, 4-8 rows of uniformly distributed ventilation round holes I102 with diameters of 2-5mm are arranged in the radial direction of the cylinder body of the first cylinder 100, 4-8 uniformly distributed ventilation round holes II 103 with diameters of 2-10mm are arranged on the bottom plate of the first cylinder 100, and a row of 2-4 outwardly protruding and uniformly distributed limit pins 104 with lengths of 5-10mm are arranged in the radial direction of the cylinder body of the first cylinder 100.
A bottom plate with a limit nut II 201 is arranged on one end face of the second cylinder 200, 4-8 rows of ventilation round holes III202 with diameters of 2-5mm and uniformly distributed are arranged in the radial direction of the cylinder body of the second cylinder 200, and limit notches 203 with widths of 2-5mm are arranged in the radial direction of the second cylinder 200.
In a specific implementation, when the second cylinder 200 is sleeved on the periphery of the first cylinder 100, the position of the limit nut I101 corresponds to the position of the limit nut II 201, and the two form a through fastening hole.
The invention is also provided with the limit bolt 105 which is matched with the limit nut I101 and the limit nut II 201, and the two ends of the limit bolt 105 are respectively combined with the limit nut I101 and the limit nut II 201, namely, the limit bolt 105 is inserted into the fastening hole and screwed and fixed, so that the bottom plates of the first cylinder 100 and the second cylinder 200 are fixedly connected, the first cylinder 100 and the second cylinder 200 are fastened and connected, and the transverse moving distance of the first cylinder 100 and the second cylinder 200 is limited.
A process for producing an artificial graphite film coiled material by using the production jig comprises the following steps:
1) And (3) coiled material assembly: winding the polyimide film into a containing cavity enclosed by the first cylinder 100 and the second cylinder 200, wherein the void ratio is 50%; the polyimide film web is cut into a rectangular hole proximate one end of the first cylinder 100 and positioned within the stop pin 104 of the first cylinder 100.
2) Carbonizing: and (3) feeding the jig for winding the polyimide film in the step (1) into a carbonization furnace for carbonization treatment. Carbonizing under the condition of the vacuum degree of the furnace chamber of 1-50Pa according to the following program: raising the temperature to 500 ℃ at a heating rate of 5 ℃/min, and preserving the temperature for 0.5h; raising the temperature to 650 ℃ at a heating rate of 1 ℃/min, and preserving the temperature for 1h; raising the temperature to 1200 ℃ at a heating rate of 3 ℃/min, and preserving the temperature for 0.5h. Cooling to room temperature to obtain the carbon film coiled material.
3) Graphitizing: and (3) stretching one end, close to the second cylinder 200, of the carbon film coiled material prepared in the step (2) to the outer ring of the jig through a limiting notch of the second cylinder 200. And (3) feeding the jig for winding the carbon film into a graphitization furnace for graphitization treatment. Graphitization is carried out under the protection of flowing argon gas according to the following procedure: rising the temperature rising rate of 20 ℃/min to 1000 ℃; raising the temperature rising rate of 6 ℃/min to 2000 ℃, and preserving heat for 0.5h; the temperature rising rate of 3 ℃/min is increased to 2800 ℃, and the temperature is kept for 0.5h. Cooling to room temperature to obtain the graphite film coiled material.
4) Uncoiling and receiving materials.
5) And (5) calendaring.
The production jig of the artificial graphite film and the process for producing the artificial graphite film coiled material by using the production jig of the artificial graphite film have the production yield of 95 percent and no apparent obvious defects.
The foregoing description of the preferred embodiments of the present invention has been presented only in terms of those specific and detailed descriptions, and is not, therefore, to be construed as limiting the scope of the invention. It should be noted that modifications, improvements and substitutions can be made by those skilled in the art without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. The utility model provides a production smelting tool of artificial graphite membrane coiled material which characterized in that: the production jig consists of a first cylinder (100) and a second cylinder (200), wherein the second cylinder (200) is sleeved on the periphery of the first cylinder (100), and an inner cavity enclosed by the first cylinder (100) and the second cylinder (200) forms an artificial graphite film coiled material accommodating cavity;
a bottom plate with a limit nut I (101) is arranged on one end face of the first cylinder (100), a plurality of uniformly distributed ventilation round holes I (102) are formed in the radial direction of the cylinder body of the first cylinder (100), a plurality of uniformly distributed ventilation round holes II (103) are formed in the bottom plate of the first cylinder (100), and a row of uniformly distributed limit pins (104) protruding outwards are arranged in the radial direction of the cylinder body of the first cylinder (100);
a bottom plate with a limit nut II (201) is arranged on one end surface of the second cylinder (200), a plurality of ventilation round holes III (202) which are uniformly distributed are arranged in the radial direction of the cylinder body of the second cylinder (200), and limit notches (203) are arranged in the radial direction of the second cylinder (200);
the device further comprises a limit bolt (105) which is matched with the limit nut I (101) and the limit nut II (201), wherein two ends of the limit bolt (105) are respectively combined with the limit nut I (101) and the limit nut II (201), so that the first cylinder (100) and the second cylinder (200) are connected;
the ventilation round holes I (102) and the ventilation round holes III (202) are arranged in 4-8 rows, and the diameters of the ventilation round holes I and the ventilation round holes III are 2-5mm;
the number of the ventilation round holes II (103) is 4-8, and the diameter of the ventilation round holes II is 2-10mm.
2. The production jig of an artificial graphite film coiled material according to claim 1, wherein: the number of the limiting pins (104) is 2-4, and the length of the limiting pins is 5-10mm.
3. The production jig of an artificial graphite film coiled material according to claim 1, wherein: the width of the limiting notch (203) is 2-5mm.
4. A process for producing an artificial graphite film coiled material by using the production jig according to any one of claims 1 to 3, comprising the following steps:
1) And (3) coiled material assembly: winding a polyimide film into a containing cavity enclosed by a first cylinder (100) and a second cylinder (200), wherein the void ratio is 40% -90%; a rectangular hole is cut at one end of the polyimide film coiled material close to the first cylinder (100) and is arranged in a limit pin (104) of the first cylinder (100);
2) Carbonizing: feeding the jig for winding the polyimide film in the step 1) into a carbonization furnace for carbonization treatment, controlling the temperature under the condition of the vacuum degree of a furnace chamber of 1-50Pa for carbonization, and cooling to room temperature to obtain a carbon film coiled material;
3) Graphitizing: one end, close to the second cylinder (200), of the carbon film coiled material prepared in the step 2) extends to the outer ring of the jig through a limiting notch (203) of the second cylinder (200), the jig for coiling the carbon film is sent into a graphitizing furnace for graphitizing treatment, graphitizing is carried out under the protection of flowing argon gas by controlling the temperature, and the graphite film coiled material is obtained after cooling to the room temperature;
4) Uncoiling and receiving materials;
5) And (5) calendaring.
5. The process for producing an artificial graphite film roll according to claim 4, wherein the step 2) is performed by controlling the temperature according to the following procedure: raising the temperature to 480-500 ℃ at a heating rate of 1-6 ℃/min, and preserving heat for 0.5-1 h; raising the temperature to 600-700 ℃ at a heating rate of 0.5-2 ℃/min, and preserving the temperature for 0.5-1 h; raising the temperature to 1000-1400 ℃ at a heating rate of 0.5-4 ℃/min, and preserving the temperature for 0.5-1 h.
6. The process for producing an artificial graphite film roll according to claim 4, wherein the step 3) is performed by controlling the temperature according to the following procedure: rising the temperature rising rate of 20 ℃/min to 1000 ℃; raising the temperature rising rate of 4-6 ℃/min to 1800-2000 ℃, and preserving heat for 0.5-1 h; raising the temperature rising rate to 2700-2850 ℃ at 3-5 ℃/min, and preserving the heat for 0.5-1 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111316744.0A CN113865357B (en) | 2021-11-08 | 2021-11-08 | Production jig for artificial graphite film coiled material and process for producing artificial graphite film coiled material by using production jig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111316744.0A CN113865357B (en) | 2021-11-08 | 2021-11-08 | Production jig for artificial graphite film coiled material and process for producing artificial graphite film coiled material by using production jig |
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| Publication Number | Publication Date |
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| CN113865357A CN113865357A (en) | 2021-12-31 |
| CN113865357B true CN113865357B (en) | 2024-04-09 |
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| CN113865357A (en) | 2021-12-31 |
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