Shaping jig and processing method of graphite heat-conducting sheet using same

Abstract

The invention discloses a shaping jig and a processing method of a graphite heat-conducting fin using the same, the shaping jig comprises a cover plate assembly comprising a cover plate, a plurality of columns of first column groups and a plurality of columns of second column groups, the first surface of the cover plate is provided with a plurality of columns of first column groups which are distributed at intervals along a first direction and are parallel to each other, and the second surface of the cover plate is provided with a plurality of second column groups; a second column of stand column groups parallel to the first column of stand column groups are arranged between every two adjacent first column of stand column groups, and the second column of stand column groups are configured to slide relative to the cover plate in the second direction; the first column of stand column set comprises a plurality of first stand columns distributed at intervals in the second direction, and the second column of stand column set comprises a plurality of second stand columns distributed at intervals in the second direction. The base assembly is provided with a top opening and a containing cavity communicated with the top opening, the containing cavity is used for containing a graphite flake, and the two ends, in the first direction, of the graphite flake are fixed in the containing cavity; the first face of the cover plate covers the top opening of the base assembly so that the first column of stand column sets and the second column of stand column sets can enter the containing cavity.

Description

Technical Field

[0001] The invention relates to the technical field of graphite heat conducting sheets, and in particular to a shaping jig and a method for processing a graphite heat conducting sheet using the jig. Background Art

[0002] Graphite is a non-metallic mineral with good thermal conductivity and is widely used in various fields, such as electronic power and energy storage and conversion equipment. Thermal conductive sheet is a material used to conduct heat energy, usually made of metal or alloy, which can effectively conduct the heat generated by the equipment to avoid overheating.

[0003] The combination of graphite and thermal conductive sheet is a common thermal management solution, which can combine the high thermal conductivity of graphite and the excellent mechanical properties of thermal conductive sheet to improve the efficiency of heat conduction. The existing production process of graphite thermal conductive sheet usually adopts the pressing molding method, that is, placing the thermal conductive slurry on the graphite sheet and pressing it to form the graphite thermal conductive sheet into the desired shape. Although this method is simple to operate, the graphite sheet will be displaced during the pressing process with the thermal conductive slurry (the main reason is that the graphite sheet is composed of many small particles, which will rub and move against each other during the pressing process, especially under high pressure, the interaction between the particles will be more obvious, causing the graphite sheet to be displaced during the pressing process), so the final graphite thermal conductive sheet will have the following problems:

[0004] 1. Since graphite sheet is a new type of thermal conductive and heat dissipation material, it has the characteristics of uniform heat conduction in two directions. During the pressing process with the thermal conductive slurry, the displacement of the graphite sheet will cause its thermal conduction channel to be blocked or changed, thereby reducing the thermal conductivity of the entire graphite thermal conductive sheet.

[0005] 2. During the pressing process with the thermal conductive slurry, the displacement of the graphite sheet may cause the contact between the graphite sheet and the thermal conductive slurry to be loose, forming an air gap or interface thermal resistance, increasing the resistance to heat transfer, and further reducing the thermal conductivity of the entire graphite thermal conductive sheet.

[0006] 3. During the pressing process with the thermal conductive slurry, the displacement of the graphite sheet may also cause unstable performance during use, such as local overheating, uneven heat dissipation, etc., affecting the reliability and service life of the graphite thermal conductive sheet.

[0007] The present invention is used to solve at least one of the above technical problems. Summary of the invention

[0008] The purpose of the present invention is to provide a shaping jig and a processing method for a graphite thermally conductive sheet using the jig. The graphite thermally conductive sheet prepared by the method can avoid displacement of the graphite sheet, which leads to a decrease in the thermal conductivity of the thermally conductive sheet, resulting in poor thermal conductivity and service life, thereby improving the thermal conductivity of the graphite thermally conductive sheet.

[0009] The purpose of the present invention is achieved by the following technical solutions:

[0010] The present invention provides a shaping jig, comprising:

[0011] A cover plate assembly, comprising a cover plate, a first column group and a second column group, wherein the cover plate has a first surface, and the first surface of the cover plate is provided with a plurality of first column groups that are spaced and parallel to each other along a first direction, and a second column group that is parallel to the first column group is provided between two adjacent first column groups, and the second column group is configured to be able to slide relative to the cover plate along the second direction;

[0012] wherein the first direction is perpendicular to the second direction;

[0013] The first column group includes a plurality of first columns spaced apart and distributed along the second direction, and the second column group includes a plurality of second columns spaced apart and distributed along the second direction;

[0014] A base assembly having a top opening and a receiving cavity communicated with the top opening, wherein the receiving cavity is used to vertically place at least one graphite sheet, and the two ends of the graphite sheet along the first direction are fixed in the receiving cavity;

[0015] The first surface of the cover plate covers the top opening of the base assembly so that the first column group and the second column group enter the accommodating cavity.

[0016] In some possible embodiments, the first surface of the cover plate is provided with a plurality of slide grooves which are spaced apart and parallel to each other along the first direction, the slide grooves are located between two adjacent columns of the first column groups, each slide groove is slidably connected to a corresponding sliding member, each of the sliding members is correspondingly provided with a column group of the second column, and all the second columns in the second column group are embedded and fixed on the corresponding sliding members.

[0017] In some possible implementations, the base plate assembly includes:

[0018] a bottom plate having a second surface opposite to the first surface of the cover plate;

[0019] Two side panels, including a first side panel and a second side panel arranged on the second surface of the bottom panel along the second direction, and the first side panel and the second side panel are parallel to each other;

[0020] Two vertical plates, including a first vertical plate and a second vertical plate arranged opposite to each other on the second surface of the bottom plate along the first direction, wherein the first vertical plate and the second vertical plate are parallel to each other;

[0021] Each side plate has a first end and a second end opposite to each other along the first direction;

[0022] Each vertical plate has a third end and a fourth end opposite to each other along the second direction;

[0023] The first end of the first side panel is connected to the third end of the first vertical panel, and the second end of the first side panel is connected to the third end of the second vertical panel; the first end of the second side panel is connected to the fourth end of the first vertical panel, and the second end of the second side panel is connected to the fourth end of the second vertical panel;

[0024] Two side panels and two vertical panels form the top opening, and are surrounded by the bottom panel to form a receiving cavity communicating with the top opening;

[0025] The graphite sheet has a fifth end and a sixth end opposite to each other along the length direction thereof. The fifth end of the graphite sheet can be fixed on the first vertical plate, and the sixth end of the graphite sheet can be fixed on the second vertical plate.

[0026] In some possible implementations, the two vertical plates are respectively provided with a plurality of vertical openings spaced apart and parallel to each other along the second direction, and along the first direction, the vertical openings on the first vertical plate correspond one to one with the vertical openings on the second vertical plate;

[0027] Each vertical plate is detachably connected with a plurality of sealing strips parallel to each other along the second direction, each sealing strip corresponds to a vertical opening, and the sealing strip is used to cover the vertical opening for sealing. The sealing strip on the first vertical plate can fix the fifth end of the graphite sheet on the first vertical plate, and the sealing strip on the second vertical plate corresponding to the sealing strip on the first vertical plate can fix the sixth end of the graphite sheet on the second vertical plate.

[0028] In some possible implementations, the cover plate has a seventh end and an eighth end opposite to each other along the first direction, and a connecting piece is disposed at the seventh end or the eighth end of the cover plate.

[0029] Two opposite ends of the connecting member along the second direction are respectively connected to a combining member, and a plurality of through holes distributed at intervals are arranged on the combining member along the first direction;

[0030] Limiting posts are respectively arranged at two opposite ends of the sliding member along the second direction, each limiting post corresponds to a through hole, and the limiting posts can be embedded in the through holes located at the same end.

[0031] In some possible embodiments, when the first surface of the cover plate covers the top opening of the base assembly, each first column in all first column groups corresponds one-to-one in the first direction to form a plurality of first row column groups, each first row column group includes a plurality of first columns spaced apart in the first direction; each second column in all second column groups corresponds one-to-one in the first direction to form a plurality of second row column groups, each second row column group includes a plurality of second columns spaced apart in the first direction; and the same graphite sheet is located between the first row column groups and the second row column groups adjacent to each other in the second direction.

[0032] In some possible implementations, when the sliding member moves a predetermined distance in the second direction, the graphite sheet is pulled by the sliding member so that the graphite sheet between two adjacent first columns in the first row of column groups in the first direction is arranged in a "V" shape.

[0033] A second aspect of the present invention provides a method for processing a graphite thermal conductive sheet, using the above-mentioned shaping jig, comprising the following steps:

[0034] Prepare at least one graphite sheet and thermal conductive slurry;

[0035] Put the graphite sheet into the base assembly so that both ends of the graphite sheet along the first direction are fixed in the accommodation cavity;

[0036] When the cover plate assembly covers the top opening of the base assembly, each first column in all first column groups corresponds one-to-one in the first direction to form a plurality of first column groups, each first column group includes a plurality of first columns spaced apart in the first direction; each second column in all second column groups corresponds one-to-one in the first direction to form a plurality of second column groups, each second column group includes a plurality of second columns spaced apart in the first direction; the same graphite sheet is located between the first column group and the second column group adjacent to each other in the second direction;

[0037] Moving the sliding member in the second direction by a predetermined distance so that the graphite sheets between two adjacent first pillars in the first row of pillar groups in the first direction are arranged in a "V" shape;

[0038] The cover plate assembly is removed from the top opening of the base assembly, and the thermal conductive slurry is injected into the receiving cavity of the base assembly;

[0039] The base assembly injected with the thermal conductive slurry is placed in an oven for heating and curing to obtain at least one graphite thermal conductive sheet.

[0040] In some possible implementations, the temperature of the oven is 140-160°C.

[0041] The beneficial effects of the present invention include at least:

[0042] 1. The sliding member is moved a predetermined distance in the second direction, so that the graphite sheet is pulled by the second column on the sliding member, that is, the second row of columns, so that the graphite sheet between two adjacent first columns in the first row of columns in the first direction is arranged in a "V" shape, thereby stretching and shaping the graphite sheet, thereby increasing the contact surface area of ​​the graphite sheet.

[0043] 2. Because when the graphite sheet contacts the thermal conductive paste, there will be a tiny gap between the graphite sheet and the thermal conductive paste. The air in the gap will hinder the transfer of heat, thus forming air thermal resistance and reducing the thermal conductivity of the entire graphite thermal conductive sheet. The graphite sheet is stretched and shaped by the shaping fixture to make the graphite sheet arranged in a "V" shape, which increases the contact surface area of ​​the graphite sheet. When the graphite sheet contacts the thermal conductive paste in the accommodating cavity, the contact surface of the graphite sheet is fully in contact with the material surface of the thermal conductive paste. This full contact reduces the thermal conductivity of the graphite sheet. The gap between the thermal conductive paste and the graphite sheet is reduced, thereby reducing or even eliminating the air thermal resistance, thereby improving the overall thermal conductivity of the graphite thermal conductive sheet; the "V" shape arrangement increases the contact surface area of ​​the graphite sheet, allowing the graphite sheet to fully contact the thermal conductive paste, which helps to evenly disperse the thermal conductive paste on the graphite sheet to avoid agglomeration, prevent local overheating and uneven heat dissipation of the entire graphite thermal conductive sheet, and further improve the thermal conductivity of the graphite thermal conductive sheet while enhancing its reliability and service life.

[0044] 3. The preparation method of the present application solves the problem in the prior art that a thermal conductive slurry is placed on a graphite sheet and pressed to form a graphite thermal conductive sheet of a desired shape. However, during the pressing process with the thermal conductive slurry, the graphite sheet will be displaced, thereby negatively affecting the thermal conductivity of the graphite thermal conductive sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the three-dimensional structure of the shaping fixture according to an embodiment of the present invention;

[0046] Figure 2 It is a schematic diagram of the cross-sectional structure of a shaping jig according to an embodiment of the present invention;

[0047] Figure 3 It is a schematic diagram of the three-dimensional structure of the cover plate assembly according to an embodiment of the present invention;

[0048] Figure 4 It is a schematic diagram of the three-dimensional structure of the base assembly according to an embodiment of the present invention;

[0049] Figure 5 It is a schematic diagram of the top view of the structure in which the graphite sheets in the base assembly are arranged in a "V" shape.

[0050] In the figure, 11, cover plate; 12, sliding member; 13, first column; 14, second column; 15, connecting member; 16, combining member; 17, limiting column; 21, bottom plate; 22, first side plate; 23, second side plate; 24, first vertical plate; 25, second vertical plate; 26, sealing strip; 10, graphite sheet. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. Reference numerals with the same number in the drawings represent the same or similar structures, and thus their repeated description will be omitted.

[0052] See attached Figure 1-5 As shown, this embodiment provides a shaping fixture, including a cover assembly and a base assembly.

[0053] The cover plate assembly includes a cover plate 11, a first column group and a second column group. The cover plate 11 has a first surface, and the first surface of the cover plate 11 is provided with a plurality of first column groups that are spaced and parallel to each other along a first direction (denoted as F1), and a second column group parallel to the first column group is provided between two adjacent first column groups, and the second column group is configured to slide relative to the cover plate 11 along a second direction.

[0054] The first column group includes a plurality of first columns 13 spaced apart along a second direction (denoted as F2), and the first columns 13 are embedded and fixed on the first surface of the cover plate 11; the second column group includes a plurality of second columns 14 spaced apart along the second direction.

[0055] It should be noted that the first direction is perpendicular to the second direction. In this embodiment, the first direction may be the length direction of the cover plate 11 , and the second direction may be the width direction of the cover plate 11 .

[0056] In some specific embodiments, see the attached Figure 3 As shown, a first surface of the cover plate 11 is provided with a plurality of slide grooves spaced and parallel to each other along the first direction, the slide grooves are located between two adjacent first column groups, each slide groove is slidably connected to a corresponding sliding member 12, each sliding member 12 is correspondingly provided with a second column group, and all second columns 14 in the second column group are embedded and fixed on the corresponding sliding member 12. Driven by the sliding member 12, the second column 14 on the sliding member 12 slides relative to the cover plate 11 along the second direction.

[0057] Furthermore, the slide groove and the sliding member 12 are both "T"-shaped, and the sliding member 12 is embedded in the slide groove, which can fully ensure the stability of the sliding member 12 sliding in the slide groove.

[0058] The base assembly has a top opening and a receiving cavity connected to the top opening. The receiving cavity is used to vertically place at least one graphite sheet 10, and the two ends of the graphite sheet 10 along the first direction are fixed in the receiving cavity. The length direction of the graphite sheet 10 is the same as the first direction.

[0059] Furthermore, the accommodating cavity can also be used to place thermal conductive slurry.

[0060] When the cover assembly is covered to the top opening of the base assembly, the first surface of the cover 11 covers the top opening of the base assembly, so that the first column group and the second column group enter the accommodating cavity.

[0061] When the first surface of the cover plate 11 covers the top opening of the base assembly, each first column 13 in all first column groups corresponds one-to-one in the first direction to form a plurality of first row column groups, each first row column group includes a plurality of first columns 13 spaced apart in the first direction; each second column 14 in all second column groups corresponds one-to-one in the first direction to form a plurality of second row column groups, each second row column group includes a plurality of second columns 14 spaced apart in the first direction; the same graphite sheet 10 is located between adjacent first row column groups and second row column groups in the second direction.

[0062] See attached Figure 5 As shown, since the graphite sheet 10 is flexible, when the sliding member 12 moves a predetermined distance in the second direction, the graphite sheet 10 is pulled by the second column 14 on the sliding member 12, i.e., the second row of columns, so that the graphite sheet 10 between two adjacent first columns 13 in the first row of columns in the first direction is arranged in a "V" shape, thereby stretching and shaping the graphite sheet 10, thereby increasing the contact surface area of ​​the graphite sheet 10.

[0063] Furthermore, the lengths of the first column 13 and the second column 14 are respectively greater than or equal to the width of the graphite sheet 10, and the first column 13 and the second column 14 are both configured as cylinders, so that the cylinders are in full contact with the graphite sheet 10, thereby further increasing the contact surface area of ​​the graphite sheet 10 during the stretching and shaping process.

[0064] In some specific embodiments, see the attached Figure 4As shown, the bottom plate assembly includes a bottom plate 21, two side plates and two vertical plates, the bottom plate 21 has a second surface opposite to the first surface of the cover plate 11; the two side plates include a first side plate 22 and a second side plate 23 arranged on the second surface of the bottom plate 21 relatively along the second direction, and the first side plate 22 and the second side plate 23 are parallel to each other; the two vertical plates include a first vertical plate 24 and a second vertical plate 25 arranged on the second surface of the bottom plate relatively along the first direction, and the first vertical plate 24 and the second vertical plate 25 are parallel to each other.

[0065] Each side panel has a first end and a second end opposite to each other in the first direction, and each vertical panel has a third end and a fourth end opposite to each other in the second direction. The first end of the first side panel 22 is connected to the third end of the first vertical panel 24, and the second end of the first side panel 22 is connected to the third end of the second vertical panel 25; the first end of the second side panel 23 is connected to the fourth end of the first vertical panel 24, and the second end of the second side panel 23 is connected to the fourth end of the second vertical panel 25.

[0066] The two side plates and the two vertical plates form a top opening, and are surrounded by the bottom plate 21 to form a receiving cavity connected to the top opening. Further, the graphite sheet 10 has a fifth end and a sixth end opposite to each other along its length direction, and the fifth end of the graphite sheet 10 can be fixed on the first vertical plate 24, and the sixth end of the graphite sheet 10 can be fixed on the second vertical plate 25.

[0067] It can be understood that the second surface of the bottom plate 21 can be regarded as the bottom of the accommodating cavity.

[0068] In some specific embodiments, see the attached Figure 1 and 4 As shown, the two vertical plates are respectively provided with a plurality of vertical openings spaced apart and parallel to each other along the second direction. Along the first direction, the vertical openings on the first vertical plate 24 correspond one to one with the vertical openings on the second vertical plate 25.

[0069] A plurality of sealing strips 26 parallel to each other along the second direction are detachably connected to each vertical plate, each sealing strip 26 corresponds to a vertical opening, and the sealing strip 26 is used to cover the vertical opening for sealing. The sealing strip 26 on the first vertical plate 24 can fix the fifth end of the graphite sheet 10 on the first vertical plate 24, and the sealing strip 26 on the second vertical plate 25 corresponding to the sealing strip 26 on the first vertical plate 24 can fix the sixth end of the graphite sheet 10 on the second vertical plate 25.

[0070] The sixth end of the graphite sheet 10 can enter the accommodating cavity through the vertical opening on the first vertical plate 24. As the accommodating cavity continues to move forward, the sixth end of the graphite sheet 10 enters the vertical opening on the second vertical plate 25. At this time, the fifth end of the graphite sheet 10 is located at the vertical opening on the first vertical plate 24. Then, the fifth end of the graphite sheet 10 is fixed to the first vertical plate 24 and the sixth end of the graphite sheet 10 is fixed to the second vertical plate 25 through the sealing strip 26. At this time, the sealing strip 26 covers and seals the vertical opening, so that the graphite sheet 10 is fixed vertically and the accommodating cavity (except the top opening) is sealed. At this time, when there are multiple graphite sheets 10 in the accommodating cavity, they are parallel to each other.

[0071] In some specific embodiments, see the attached Figure 1 and 3 As shown, the cover plate 11 has a seventh end and an eighth end opposite to each other along the first direction, and a connector 15 is provided at the seventh end or the eighth end of the cover plate 11. Two opposite ends of the connector 15 along the second direction can be connected to a coupling member 16 respectively, and the coupling member 16 is provided with a plurality of through holes distributed at intervals along the first direction.

[0072] Limiting posts 17 are respectively provided at two opposite ends of the sliding member 12 along the second direction. The limiting posts 17 are embedded and fixed on the sliding member 12. Each limiting post 17 corresponds to a through hole, and the limiting posts 17 can be embedded in the through holes at the same end.

[0073] After the sliding member 12 moves a predetermined distance on the slide groove along the second direction, in order to fully stretch and shape the graphite sheet 10 and prevent the sliding member 12 from moving too much to affect the shaping effect, it is necessary to fix the two ends of the sliding member 12. By embedding the limiting columns 17 on the sliding member 12 into the through holes on the corresponding coupling members 16, the sliding member 12 is fixed to ensure the stretching and shaping effect of the graphite sheet 10.

[0074] This embodiment also provides a method for processing a graphite thermal conductive sheet, which uses the above-mentioned shaping fixture to stretch and shape the graphite sheet, including the following steps S1 to S6.

[0075] Step S1: preparing at least one graphite sheet 10 and thermal conductive slurry.

[0076] The raw material formula of the thermal conductive slurry does not belong to the content to be protected in this application and will not be described here.

[0077] Step S2: placing the graphite sheet 10 into the base assembly so that both ends of the graphite sheet 10 along the first direction are fixed in the accommodation cavity.

[0078] Step S3: When the cover plate assembly covers the top opening of the base assembly, each first column 13 in all first column groups corresponds one-to-one in the first direction to form a plurality of first row column groups, and each first row column group includes a plurality of first columns 13 spaced apart in the first direction; each second column 14 in all second column groups corresponds one-to-one in the first direction to form a plurality of second row column groups, and each second row column group includes a plurality of second columns 14 spaced apart in the first direction; and the same graphite sheet is located between the first row column groups and the second row column groups adjacent to each other in the second direction.

[0079] Step S4: After the sliding member 12 is moved on the slide groove for a predetermined distance along the second direction, both ends of the sliding member 12 are fixed so that the graphite sheets between two adjacent first columns 13 in the first row of column groups in the first direction are arranged in a "V" shape.

[0080] Step S5: remove the cover assembly from the top opening of the base assembly and inject thermal conductive slurry into the accommodating cavity of the base assembly.

[0081] Step S6: placing the base assembly injected with the thermal conductive slurry into an oven for heating and curing to obtain at least one graphite thermal conductive sheet.

[0082] In some specific embodiments, the temperature of the oven is 140-160°C. If the temperature of the oven is too high, it may accelerate the oxidation and consumption of the graphite sheet, resulting in a decrease in its performance, such as reduced strength and hardness, and poor conductivity and thermal stability. If the temperature of the oven is too low, it may be detrimental to the diffusion of molecules in the thermal conductive slurry into the graphite sheet, making it impossible for the graphite sheet and the thermal conductive slurry to be fully combined.

[0083] The preferred temperature in this embodiment is 150° C. to ensure that the graphite sheet and the thermally conductive slurry can be fully combined, to ensure the thermal conductivity of the graphite thermally conductive sheet, and to improve its overall stability.

[0084] Because when the graphite sheet contacts the thermal conductive paste, there will be a tiny gap between the graphite sheet and the thermal conductive paste, and the air in the gap will hinder the transfer of heat, thereby forming air thermal resistance and reducing the thermal conductivity of the entire graphite thermal conductive sheet. The graphite sheet is stretched and shaped by the shaping fixture to make the graphite sheet arranged in a "V" shape, thereby increasing the contact surface area of ​​the graphite sheet. When the graphite sheet contacts the thermal conductive paste in the accommodating cavity, the contact surface of the graphite sheet is fully in contact with the material surface of the thermal conductive paste. Through this full contact, the gap between the thermal conductive paste and the graphite sheet is reduced, thereby reducing or even eliminating the air thermal resistance, thereby improving the overall thermal conductivity of the graphite thermal conductive sheet; the "V"-shaped arrangement increases the contact surface area of ​​the graphite sheet, allowing the graphite sheet to fully contact the thermal conductive paste, which helps to evenly disperse the thermal conductive paste on the graphite sheet, avoid agglomeration, and prevent the entire graphite thermal conductive sheet from having problems such as local overheating and uneven heat dissipation, further improving the thermal conductivity of the graphite thermal conductive sheet while enhancing its reliability and service life.

[0085] The processing method of the present application solves the problem in the prior art that a thermally conductive slurry is placed on a graphite sheet and pressed to form a graphite thermally conductive sheet of a desired shape, but during the pressing process with the thermally conductive slurry, the graphite sheet will be displaced, thereby negatively affecting the thermal conductivity of the graphite thermally conductive sheet.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A shaping fixture, characterized in that: include: A cover plate assembly, comprising a cover plate, a first column group and a second column group, wherein the cover plate has a first surface, and the first surface of the cover plate is provided with a plurality of first column groups that are spaced and parallel to each other along a first direction, and a second column group that is parallel to the first column group is provided between two adjacent first column groups, and the second column group is configured to be able to slide relative to the cover plate along the second direction; wherein the first direction is perpendicular to the second direction; The first column group includes a plurality of first columns spaced apart and distributed along the second direction, and the second column group includes a plurality of second columns spaced apart and distributed along the second direction; A base assembly having a top opening and a receiving cavity communicated with the top opening, wherein the receiving cavity is used to vertically place at least one graphite sheet, and the two ends of the graphite sheet along the first direction are fixed in the receiving cavity; The first surface of the cover plate covers the top opening of the base assembly so that the first column group and the second column group enter the accommodating cavity.

2. The shaping jig according to claim 1, characterized in that: The first surface of the cover plate is provided with a plurality of slide grooves which are spaced apart and parallel to each other along the first direction, the slide grooves being located between two adjacent columns of the first column groups, each slide groove being slidably connected to a corresponding sliding member, each of the sliding members being provided with a corresponding column group of the second column, and all the second columns in the second column group being embedded and fixed on the corresponding sliding members.

3. The shaping jig according to claim 1 or 2, characterized in that: The base plate assembly comprises: a bottom plate having a second surface opposite to the first surface of the cover plate; Two side panels, including a first side panel and a second side panel arranged on the second surface of the bottom panel along the second direction, and the first side panel and the second side panel are parallel to each other; Two vertical plates, including a first vertical plate and a second vertical plate arranged opposite to each other on the second surface of the bottom plate along the first direction, wherein the first vertical plate and the second vertical plate are parallel to each other; Each side plate has a first end and a second end opposite to each other along the first direction; Each vertical plate has a third end and a fourth end opposite to each other along the second direction; The first end of the first side panel is connected to the third end of the first vertical panel, and the second end of the first side panel is connected to the third end of the second vertical panel; the first end of the second side panel is connected to the fourth end of the first vertical panel, and the second end of the second side panel is connected to the fourth end of the second vertical panel; Two side panels and two vertical panels form the top opening, and are surrounded by the bottom panel to form a receiving cavity communicating with the top opening; The graphite sheet has a fifth end and a sixth end opposite to each other along the length direction thereof. The fifth end of the graphite sheet can be fixed on the first vertical plate, and the sixth end of the graphite sheet can be fixed on the second vertical plate.

4. The shaping jig according to claim 3, characterized in that: The two vertical plates are respectively provided with a plurality of vertical openings which are spaced and distributed along the second direction and are parallel to each other, and along the first direction, the vertical openings on the first vertical plate correspond to the vertical openings on the second vertical plate one by one; Each vertical plate is detachably connected with a plurality of sealing strips parallel to each other along the second direction, each sealing strip corresponds to a vertical opening, and the sealing strip is used to cover the vertical opening for sealing. The sealing strip on the first vertical plate can fix the fifth end of the graphite sheet on the first vertical plate, and the sealing strip on the second vertical plate corresponding to the sealing strip on the first vertical plate can fix the sixth end of the graphite sheet on the second vertical plate.

5. The shaping jig according to claim 4, characterized in that: The cover plate has a seventh end and an eighth end opposite to each other along the first direction, and a connecting piece is disposed at the seventh end or the eighth end of the cover plate. Two opposite ends of the connecting member along the second direction are respectively connected to a combining member, and a plurality of through holes distributed at intervals are arranged on the combining member along the first direction; Limiting posts are respectively arranged at two opposite ends of the sliding member along the second direction, each limiting post corresponds to a through hole, and the limiting posts can be embedded in the through holes located at the same end.

6. The shaping jig according to claim 1, characterized in that: When the first surface of the cover plate covers the top opening of the base assembly, each first column in all first column groups corresponds one-to-one in the first direction to form a plurality of first row column groups, each first row column group includes a plurality of first columns spaced apart in the first direction; each second column in all second column groups corresponds one-to-one in the first direction to form a plurality of second row column groups, each second row column group includes a plurality of second columns spaced apart in the first direction; the same graphite sheet is located between the first row column group and the second row column group adjacent to each other in the second direction.

7. The shaping jig according to claim 6, characterized in that: When the sliding member moves a predetermined distance in the second direction, the graphite sheets are pulled by the sliding member so that the graphite sheets are arranged in a "V" shape between two adjacent first pillars in the first row of pillar groups in the first direction.

8. A method for processing a graphite thermal conductive sheet, characterized in that: The use of the shaping jig according to any one of claims 1 to 9 comprises the following steps: Prepare at least one graphite sheet and thermal conductive slurry; Put the graphite sheet into the base assembly so that both ends of the graphite sheet along the first direction are fixed in the accommodation cavity; When the cover plate assembly covers the top opening of the base assembly, each first column in all first column groups corresponds one-to-one in the first direction to form a plurality of first column groups, each first column group includes a plurality of first columns spaced apart in the first direction; each second column in all second column groups corresponds one-to-one in the first direction to form a plurality of second column groups, each second column group includes a plurality of second columns spaced apart in the first direction; the same graphite sheet is located between the first column group and the second column group adjacent to each other in the second direction; Moving the sliding member in the second direction by a predetermined distance so that the graphite sheets between two adjacent first pillars in the first row of pillar groups in the first direction are arranged in a "V" shape; The cover plate assembly is removed from the top opening of the base assembly, and the thermal conductive slurry is injected into the receiving cavity of the base assembly; The base assembly injected with the thermal conductive slurry is placed in an oven for heating and curing to obtain at least one graphite thermal conductive sheet.

9. The processing method according to claim 10, characterized in that: The temperature of the oven is 140-160°C.

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