Preparation method for converting heat conduction material into vertical heat conduction material

Abstract

The invention discloses a preparation method for converting a facing heat conduction material into a vertical heat conduction material. The preparation method comprises the following steps: stacking the facing heat conduction material into a blank; processing the blank-shaped body into a sheet-shaped body along a vertical surface facing one extension direction of the heat conduction material; and the machined face of the sheet-shaped body is sealed through evaporation. According to the preparation method for converting the facing heat conduction material into the vertical heat conduction material, the heat conduction direction of the prepared vertical heat conduction material is perpendicular to the heat conduction direction of the original facing heat conduction material, and parameters such as the thickness and the area of the vertical heat conduction material can be adjusted according to design requirements.

Description

Technical Field

[0001] The invention relates to the field of heat conducting materials, and in particular to a preparation method for converting a lateral heat conducting material into a vertical heat conducting material. Background Art

[0002] At present, the thermal conductivity of the thermal conductive materials studied and applied is anisotropic. For example, graphene materials have very high thermal conductivity along the plane direction, so it is the most popular thermal conductive material at this stage, but along the perpendicular direction of the plane, it is only 1 / 300 of the plane direction. The thermal conductivity of a slightly thicker graphene film is the same as that of a graphite block, and the high thermal conductivity of the graphitized polyimide film is also in a very thin state. In this way, the application of these high thermal conductivity films has the problem of thickness size and low thermal conductivity in the thickness direction, which affects the direction and capacity of high-power heat extraction. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a preparation method for converting a directional heat conducting material into a vertical heat conducting material, wherein the heat conducting direction of the prepared vertical heat conducting material is perpendicular to the heat conducting direction of the original directional heat conducting material.

[0004] The present invention discloses a preparation method for converting a directional heat conducting material into a vertical heat conducting material, comprising the following steps: Laminating the facing heat conducting material into a green body; Processing the blank body into a sheet body along a vertical surface facing an extension direction of the heat conducting material; The processed surface of the sheet body is sealed by vapor deposition.

[0005] Furthermore, the facing heat-conducting materials are in the form of plates, and adjacent facing heat-conducting materials are coated with glue.

[0006] Furthermore, the heat-conducting material is laminated and pressed to form the block-shaped green body.

[0007] Furthermore, the surface-oriented heat-conducting material is graphene paper or a heat-conducting graphite sheet.

[0008] Furthermore, the facing heat-conducting material is in the form of a film, and the facing heat-conducting material in the form of a film is coated with glue on one surface, and then rolled along the other extending direction to form the rod-shaped blank.

[0009] Furthermore, the facing heat-conducting material is in the form of a film roll, and after the film roll-shaped facing heat-conducting material is unrolled, one surface thereof is coated with glue, and then it is rolled into the rod-shaped blank body along the other extending direction thereof.

[0010] Furthermore, the facing heat-conducting material is in the form of a film roll, and after the film roll is unrolled, both surfaces of the facing heat-conducting material are coated with glue, and then folded back and forth along another extending direction and pressed into the block-shaped blank.

[0011] Furthermore, the surface-oriented heat-conducting material is a graphene film or a graphitized polyimide film.

[0012] Furthermore, the blank is processed into a sheet by die cutting or wire cutting.

[0013] Furthermore, the processed surface of the sheet body is silver-plated.

[0014] The vertical heat conducting material of the sheet prepared by the preparation method of converting the surface heat conducting material into the vertical heat conducting material provided by the present invention has a high heat conducting direction that is the extension direction of the processing surface, which is perpendicular to the heat conducting direction of the original surface heat conducting material, and the thickness and area and other parameters of the vertical heat conducting material of the sheet can be adjusted according to the design requirements and then prepared according to the preparation method of the present invention. In addition, the prepared vertical heat conducting material of the sheet can effectively solve the problem of difficulty in preparing heat conducting devices caused by the increase in heat dissipation power due to the thickness of the surface heat conducting material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The present invention is a flow chart of the preparation method for converting a directional heat conducting material into a vertical heat conducting material.

[0017] Figure 2 This is a schematic diagram of the preparation process of Example 1 of the present invention.

[0018] Figure 3 The present invention is a flow chart of the preparation method of embodiment 1.

[0019] Figure 4 Schematic diagram of the preparation process of Example 2 and Example 3 of the present invention.

[0020] Figure 5 This is a flow chart of the preparation method of Example 2 of the present invention.

[0021] Figure 6 This is a flow chart of the preparation method of Example 3 of the present invention.

[0022] Figure 7Schematic diagram of the preparation process of Example 4 of the present invention.

[0023] Figure 8 This is a flow chart of the preparation method of Example 4 of the present invention. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0026] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0027] See also Figure 1 The present invention discloses a method for preparing a directional heat conducting material into a vertical heat conducting material, comprising the following steps: Laminating the facing heat conducting material into a green body; Processing the blank body into a sheet body along a vertical surface facing an extension direction of the heat conducting material; The processed surface of the sheet body is sealed by vapor deposition.

[0028] The heat conduction direction of the vertical heat conducting material manufactured by the preparation method of the present invention is along the thickness direction of the block-shaped green body, which is perpendicular to the heat conduction direction of the oriented heat conducting material.

[0029] Embodiment 1: See also Figure 2 and Figure 3 The present invention discloses a preparation method for converting a directional heat-conducting material into a vertical heat-conducting material. This embodiment is described by taking a plate-shaped directional heat-conducting material as an example, and includes the following steps: S1. Cut several plate-shaped heat-conducting materials with different sizes into the same size or take several plate-shaped heat-conducting materials with the same size, wherein the several plate-shaped heat-conducting materials have the same thermal conductivity and the heat-conducting materials all conduct heat along the plane direction. In this embodiment, the cutting method of the plate-shaped heat-conducting materials with different sizes adopts the die cutting processing method; S2, stacking plate-shaped heat-conducting materials with the same size from top to bottom, and applying glue between adjacent plate-shaped heat-conducting materials; S3, pressing the glue-coated stacked heat-conducting materials into a block-shaped green body through a mold; S4, processing the blank body along a vertical surface facing an extension direction of the heat conducting material into a sheet body, wherein the sheet body has at least one processed surface. In this embodiment, the processing method is die cutting or wire cutting, so that the sheet body has at least one cutting surface; S5. The cut surface of the sheet body is sealed by evaporating silver to form a sealing sheet, and finally a vertical heat conducting material is obtained.

[0030] The heat conduction direction of the vertical heat conducting material manufactured by the preparation method of this embodiment is along the thickness direction of the block-shaped green body, which is perpendicular to the heat conduction direction of the oriented heat conducting material.

[0031] In the first embodiment of the present invention, the oriented heat conducting material may be a heat conducting material with high thermal conductivity such as graphene paper or heat conducting graphite sheet.

[0032] Embodiment 2: See also Figure 4 and Figure 5 The present invention also discloses a preparation method for converting a directional heat-conducting material into a vertical heat-conducting material. This embodiment is described by taking a diaphragm-shaped directional heat-conducting material as an example, and includes the following steps: S1. Take a film-shaped heat-conducting material, apply glue to one surface of the film-shaped heat-conducting material, and roll it inwardly toward the glue-coated surface along another extending direction from the end surface of the film-shaped heat-conducting material in one extending direction to form a rod-shaped blank. More specifically, in this embodiment, the heat-conducting material is rolled inwardly toward the glue-coated surface along the extending direction of the long side from the end surface of the film-shaped heat-conducting material in the other extending direction to form a rod-shaped blank. S2, processing the rod-shaped blank into a sheet along a vertical surface facing the extending direction of the wide side of the heat conducting material, wherein the sheet has at least one processed surface. In this embodiment, the processing method is die cutting or wire cutting, so that the sheet has at least one cutting surface; S3, sealing the cut surface of the sheet by evaporating silver to form a sealing sheet, and finally obtaining a vertical heat conducting material.

[0033] Embodiment three: See also Figure 4 and Figure 6 The present invention also discloses a preparation method for converting a facing heat conductive material into a vertical heat conductive material. This embodiment is described by taking a film roll-shaped facing heat conductive material as an example. Its preparation method is substantially the same as that of the second embodiment, except that the facing heat conductive material is in a film roll-shaped form. Therefore, before preparation, the film roll-shaped facing heat conductive material needs to be unrolled and processed into a film sheet, and then further processed according to the preparation method of the second embodiment.

[0034] The heat conduction direction of the vertical heat conducting material manufactured by the preparation methods of Embodiment 2 and Embodiment 3 is perpendicular to the extension direction of the wide side of the rod-shaped blank, and is perpendicular to the heat conduction direction of the facing heat conducting material.

[0035] Embodiment 4: See also Figure 7 and Figure 8 The present invention also discloses a preparation method for converting a directional heat-conducting material into a vertical heat-conducting material. This embodiment is described by taking a film roll-shaped directional heat-conducting material as an example, and includes the following steps: S1, unwinding the film roll facing the heat conducting material; S2, coating both sides of the unrolled heat-conducting facing material with glue, and then folding it back and forth along the other extension direction and pressing it into a block-shaped blank. In this embodiment, the heat-conducting facing material is folded back and forth along the extension direction of its long side with one end surface of its wide side as the starting point and pressed into a block-shaped blank; S3, processing the block-shaped blank body along a vertical surface facing one extension direction of the heat conducting material into a sheet-shaped body. In this embodiment, the block-shaped blank body is processed along a vertical surface facing the extension direction of the wide side of the heat conducting material into a sheet-shaped body, and the sheet-shaped body has at least one processed surface. More specifically, in this embodiment, the processing method adopts die cutting or wire cutting, so that the sheet-shaped body has at least one cutting surface; S4, performing sealing treatment on the cut surface of the sheet body by evaporating silver to form a sealing sheet, and finally obtaining a vertical heat conducting material.

[0036] The heat conduction direction of the vertical heat conducting material manufactured by the preparation method of Example 4 is along the thickness direction of the block-shaped green body, which is perpendicular to the heat conduction direction of the oriented heat conducting material.

[0037] Furthermore, in the second, third and fourth embodiments, the film sheet or film roll-shaped heat-conducting material facing the surface is a graphene film or a graphitized polyimide film. More specifically, in the present invention, the film sheet or film roll-shaped heat-conducting material facing the surface is a graphitized polyimide film. Because the graphitized polyimide film is thinner and has a higher thermal conductivity, it is more favored.

[0038] In summary, the vertical thermal conductive material in the form of a sheet prepared by the preparation method for converting a surface thermal conductive material into a vertical thermal conductive material provided by the present invention has a high thermal conductivity direction along the extension direction of the processing surface, which is perpendicular to the high thermal conductivity direction of the original surface thermal conductive material. Moreover, the thickness, area and other parameters of the vertical thermal conductive material in the form of a sheet can be adjusted according to design requirements and then prepared according to the preparation method of the present invention. The thickness of the vertical thermal conductive material can be adjusted by a cutting device, and the area of ​​the vertical thermal conductive material can be adjusted according to the number of stacked layers or the number of coils. In addition, the prepared vertical thermal conductive material in the form of a sheet can effectively solve the problem of difficulty in preparing thermal conductive devices caused by the increase in heat dissipation power due to thickness restrictions on surface thermal conductive materials.

[0039] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for preparing a directional heat conducting material into a vertical heat conducting material, characterized in that: The following steps are involved: Laminating the facing heat conducting material into a green body; Processing the blank body into a sheet body along a vertical surface facing an extension direction of the heat conducting material; The processed surface of the sheet is sealed by vapor deposition.

2. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 1, characterized in that: The facing heat-conducting materials are in the form of plates, and adjacent facing heat-conducting materials are coated with glue.

3. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 2, characterized in that: The heat-conducting material is laminated and pressed to form the block-shaped green body.

4. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 2, characterized in that: The oriented heat conducting material is graphene paper or a heat conducting graphite sheet.

5. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 1, characterized in that: The heat-conducting material facing the surface is in the form of a film, and the heat-conducting material facing the surface of the film is coated with glue on one surface, and then rolled into the rod-shaped blank along the other extending direction.

6. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 1, characterized in that: The facing heat-conducting material is in the form of a film roll. After the film roll-shaped facing heat-conducting material is unrolled, one surface thereof is coated with glue, and then the material is rolled into the rod-shaped blank along the other extending direction thereof.

7. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 1, characterized in that: The facing heat-conducting material is in the form of a film roll. After the film roll is unrolled, the two surfaces of the facing heat-conducting material are coated with glue, and then the material is folded back and forth along another extending direction and pressed into the block-shaped blank.

8. The method for preparing a directional heat conducting material into a vertical heat conducting material according to any one of claims 5 to 7, characterized in that: The surface heat conducting material is a graphene film or a graphitized polyimide film.

9. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 1, characterized in that: The blank is processed into a sheet by die cutting or wire cutting.

10. The method for preparing a directional heat conducting material into a vertical heat conducting material according to claim 1, characterized in that: The processed surface of the sheet body is silver plated.

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