Graphite edge covering device

Abstract

The utility model relates to the field of graphite edge covering, in particular to a device for graphite edge covering. According to the technical scheme, the edge covering device is characterized in that the edge covering device comprises a rack, an upper die, a lower die and an adjusting assembly, the lower die is rotationally installed on the rack, the adjusting assembly is also installed on the rack, the upper die is rotationally installed in the adjusting assembly, the upper die and the lower die are matched to be used for pressing a covered edge, and the adjusting assembly is used for adjusting the pressing degree of the upper die and the lower die; the rubber layer is pressed on the upper surface and the side surface of the graphite sheet by the bulges, namely the rubber layer is pressed into a vertical step shape, so that the edge covering area of the rubber layer is reduced in unit area, and the area of the graphite sheet in the unit area is increased.

Description

Technical Field

[0001] The present application relates to the field of graphite edging, and in particular to a device for graphite edging. Background Art

[0002] The structure of graphite is a layered crystal with high electrical conductivity, high thermal conductivity and good lubricity. Compared with traditional heat sinks, graphite heat sinks have higher heat dissipation efficiency, can reduce equipment temperature and improve equipment operation stability, so they are widely used in heat conduction and heat dissipation products of electronic products or communication base stations.

[0003] When graphite is used for heat dissipation, it is usually pressed into a sheet structure. However, flake graphite is fragile, so it needs to be encapsulated and shaped before being installed on electronic products. The existing equipment for encapsulating graphite products mainly includes an upper template and a lower template, which are installed on the production line of graphite sheet encapsulation. An adhesive layer is laid on the upper and lower sides of the graphite sheet, and the upper template and the lower template press the adhesive layer onto the graphite sheet.

[0004] With regard to the above-mentioned related technologies, since the graphite sheet sandwiched in the middle layer has thickness, the two adhesive layers are pressed on the two side edges of the graphite sheet in a partially inclined state, so that the adhesive layer also occupies a certain area per unit area, thereby resulting in a reduction in the area of ​​graphite per unit area, thereby reducing the heat dissipation rate. Utility Model Content

[0005] In order to increase the area of ​​graphite sheets per unit area, the present application provides a device for graphite edging.

[0006] The present application provides a graphite hemming device that adopts the following technical solution:

[0007] A device for graphite hemming comprises an upper die and a lower die, and a frame; the upper die is rotatably arranged on the frame, the upper die is provided with a protrusion, and the protrusion is used to press an upper glue layer onto the graphite sheet along the edge of the graphite sheet; and a lower die is rotatably arranged on the frame, the graphite sheet is arranged between the upper die and the lower die, and the lower die is used to press a lower glue layer onto the graphite sheet.

[0008] Through the above technical scheme, the upper film and the lower mold sandwich the graphite sheet in the middle, and the adhesive layer is pressed on the upper and lower sides of the graphite sheet. The lower mold presses the lower adhesive layer flatly on the graphite sheet, and the protrusions on the upper mold press the adhesive layer tightly on the upper surface and side surface of the graphite sheet, that is, presses it into a vertical step shape, thereby reducing the area of ​​the adhesive layer edge per unit area and increasing the area of ​​the graphite sheet per unit area.

[0009] Preferably, the upper die is a circular roller, and the protrusion protrudes from the surface of the upper die; the lower die is also a circular roller, and the graphite sheet is clamped between the upper die and the lower die. The graphite sheet moves under the pulling force, and the upper die and the lower die rotate.

[0010] Through the above technical solution, compared with the upper and lower pressing molds, the graphite sheet moves between the upper mold and the lower mold, and the continuous rotation of the circular roller can continuously press the adhesive layer, saving the time of opening and closing the upper and lower pressing molds, thereby improving the pressing efficiency of the adhesive layer.

[0011] Preferably, the protrusion is provided with rounded corners.

[0012] Through the above technical solution, the arc-shaped fillet can compress the adhesive layer, while reducing the possibility of the protrusion cutting the adhesive layer, thereby improving the edge wrapping quality of the adhesive layer.

[0013] Preferably, the protrusion height is 0.5-2 mm.

[0014] Through the above technical solution, the upper mold with different protrusion heights can be replaced according to the different thicknesses of graphite sheets to meet different pressing requirements.

[0015] Preferably, a pre-tightening member is further included, the upper mold is fixedly connected to the pre-tightening member, and the pre-tightening member is used to increase the resistance when the upper mold rotates.

[0016] Through the above technical solution, the graphite sheet is pulled forward by the tension, and the upper mold rotates to press the adhesive layer. The upper mold has resistance when rotating, so that the protrusions and the adhesive layer abut more fully, thereby making the adhesive layer pressed more tightly.

[0017] Preferably, it further comprises an adjusting component, the upper mold is rotatably arranged on the adjusting component, and the adjusting component is used to control the upper mold to approach or move away from the lower mold.

[0018] Through the above technical solution, the clamping degree of the upper mold relative to the lower mold can be adjusted, so as to control the fitting degree of the adhesive layer and meet different fitting requirements.

[0019] Preferably, the adjustment assembly includes a power element for outputting power; and a slide seat, which is slidably arranged on the frame, and the upper mold is rotatably arranged in the slide seat. The power element is fixedly connected to the slide seat, and the power element is used to drive the slide seat to move.

[0020] Through the above technical solution, the power element drives the slide to move, thereby driving the upper mold to move, adjusting the clamping degree of the upper mold relative to the lower mold, and the adjustment process is relatively convenient.

[0021] Preferably, the upper mold and the lower mold are provided in multiple groups and are evenly spaced apart on the frame.

[0022] Through the above technical solution, the graphite sheet and the adhesive layer are rolled multiple times, which is beneficial to improving the bonding quality of the adhesive layer.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The upper film and the lower die sandwich the graphite sheet in the middle, and press the adhesive layer on the upper and lower sides of the graphite sheet. The lower die presses the lower adhesive layer flatly on the graphite sheet. The protrusions on the upper die press the adhesive layer tightly on the upper and side surfaces of the graphite sheet, that is, press it into a vertical step shape, which reduces the area of ​​the adhesive layer wrapping per unit area and increases the area of ​​the graphite sheet per unit area.

[0025] 2. Compared with the upper and lower pressing molds, the graphite sheet moves between the upper and lower molds, and the continuous rotation of the circular roller can continuously press the adhesive layer, saving the time of opening and closing the upper and lower pressing molds, thereby improving the pressing efficiency of the adhesive layer.

[0026] 3. The graphite sheet moves forward under the pulling force, and the upper die rotates to press the adhesive layer. The upper die has resistance when rotating, so that the protrusions and the adhesive layer abut more fully, thereby making the adhesive layer pressed more tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a graphite hemming device in a preferred embodiment of the present application.

[0028] Figure 2 yes Figure 1 Enlarged view of part A.

[0029] Explanation of the reference numerals: 1. Frame; 2. Upper die; 3. Lower die; 4. Protrusion; 5. Rounded corner; 6. Adjustment assembly; 61. Power element; 62. Slide seat; 7. Slide groove; 8. Preload member. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application embodiment discloses a device for graphite hemming. Figure 1 The graphite hemming device includes a frame 1, an upper die 2, a lower die 3 and an adjusting assembly 6, wherein the lower die 3 is rotatably mounted on the frame 1, the adjusting assembly 6 is also mounted on the frame 1, the upper die 2 is rotatably mounted in the adjusting assembly 6, the upper die 2 and the lower die 3 cooperate to compress the hemming, and the adjusting assembly 6 is used to adjust the degree of compression between the upper die 2 and the lower die 3.

[0032] refer to Figure 1In this embodiment, the graphite hemming device is applied to the production line of the graphite hemming process. The upstream equipment attaches the upper glue layer to the upper surface of the graphite sheet and the lower glue layer to the lower surface of the graphite sheet. The graphite sheet is pulled by the tension of the downstream winding equipment and transmitted to the graphite hemming device, wherein the frame 1 is fixedly installed on the ground, and the frame 1 provides an installation position for the adjustment component 6, the upper mold 2 and the lower mold 3. The graphite sheet wrapped with the upper glue layer and the lower glue layer passes between the upper mold 2 and the lower mold 3. The upper mold 2 and the lower mold 3 are used to tightly bond the upper glue layer and the lower glue layer to the graphite sheet.

[0033] refer to Figure 1 and Figure 2 The upper mold 2 and the lower mold 3 are used to bond the upper glue layer and the lower glue layer to the graphite sheet. Specifically, the upper mold 2 is a circular roller, and both ends of the upper mold 2 are rotatably mounted on the frame 1. The lower mold 3 is a circular roller, and both ends of the lower mold 3 are rotatably mounted on the frame 1, and the lower mold 3 is located below the upper mold 2. A gap is left between the upper mold 2 and the lower mold 3 for the graphite sheet to pass through. Compared with the traditional upper and lower pressing molds, the circular roller has stronger rotation continuity, and the compression and hemming operation can be completed during the operation of the graphite hemming process line.

[0034] Since the graphite sheet has a certain thickness, when the upper glue layer and the lower glue layer are pressed on both sides of the graphite sheet, the glue layer at the edge of the graphite sheet is partially inclined, so that the glue layer occupies a certain area in a certain unit area, thereby resulting in a reduction in the area of ​​graphite per unit area. Therefore, a protrusion 4 is protruding on the surface of the circular roller of the upper mold 2, and the surface of the circular roller of the lower mold 3 is flat. When the graphite sheet wrapped with the upper glue layer and the lower glue layer passes through the gap between the upper mold 2 and the lower mold 3, the upper mold 2 is pressed against the upper glue layer and rotates at the same time, and the lower mold 3 is pressed against the lower glue layer and rotates at the same time. The protrusion 4 on the upper mold 2 presses the inclined upper glue layer near the edge of the graphite sheet tightly against the side surface of the graphite sheet, that is, presses it into a vertical step shape, and the lower glue layer is flat and bonded to the graphite sheet and the upper glue layer.

[0035] It should be noted that, corresponding to products of different thicknesses, the height of the protrusion 4 also needs to be adjusted accordingly in order to better press the upper glue layer onto the graphite sheet. Therefore, according to the thickness of different existing products, multiple upper molds 2 are made, and the height of the protrusion 4 on the upper mold 2 varies between 0.5-2mm. In actual production, the upper mold 2 with a suitable height of the protrusion 4 can be selected according to the thickness of the graphite sheet being produced to meet different pressing requirements; and in order to reduce the possibility that the pressed upper glue layer is no longer separated from the graphite sheet and the lower glue layer, the pressing process of the upper glue layer and the lower glue layer adopts a heating pressing method, which is helpful for the shaping of the upper glue layer and the lower glue layer. In this embodiment, the heating temperature is 200°C, and in other embodiments, the temperature can be adjusted according to different materials.

[0036] refer to Figure 1and Figure 2 When the upper mold 2 rolls over the upper glue layer, the protrusion 4 is pressed tightly against the glue layer, and the protrusion 4 has the possibility of directly breaking the upper glue layer, resulting in reduced edge quality. Therefore, a rounded corner 5 is provided on the edge profile of the protrusion 4. The arc-shaped rounded corner 5 is closely connected with the upper glue layer, which can not only press the upper glue layer tightly, but also reduce the possibility of cutting the upper glue layer, which is beneficial to improving the edge quality.

[0037] refer to Figure 1 , due to different products, the thickness of the graphite sheet is different. If the distance between the upper mold 2 and the lower mold 3 cannot be adjusted, the pressing requirements of different products cannot be met. Therefore, an adjusting component 6 is provided to adjust the distance between the upper mold 2 and the lower mold 3. Specifically, the adjusting component 6 includes a power element 61 and a slide seat 62. In this embodiment, the power element 61 is a telescopic cylinder, which is vertically arranged and fixedly installed on the frame 1. The telescopic rod of the telescopic cylinder can be extended or retracted downward to output power; the slider is arranged on the frame 1. Specifically, the slider is a block structure, and a slide groove 7 is provided on the frame 1. The slide groove 7 is provided along the telescopic direction of the telescopic rod of the telescopic cylinder, and the slider is slidably installed in the slide groove 7, so that the slider is slidably installed on the frame 1, the telescopic rod of the telescopic cylinder is fixedly connected to the slider, and the upper mold 2 is rotatably installed in the slider, and the power element 61 is used to drive the upper mold 2 to move along the slide groove 7, so that the upper mold 2 can be close to or away from the lower mold 3, thereby adjusting the distance between the upper mold 2 and the lower mold 3, and the adjustment process is relatively convenient.

[0038] It should be particularly noted that in order to synchronize the movement of the two ends of the upper mold 2, adjustment components 6 are installed at both ends of the upper mold 2, and the adjustment components 6 at both ends move synchronously; in other embodiments, the power element 61 can also be a screw stepper motor or a piston or other element that can output linear motion.

[0039] refer to Figure 1 If the graphite sheet is only pulled by the downstream pulling force, the graphite sheet may not be pressed tightly when passing between the upper mold 2 and the lower mold 3. Therefore, a pre-tightening member 8 is also provided. Specifically, in this embodiment, the pre-tightening member 8 is a hysteresis brake, which is coaxially connected to the upper mold 2 and fixedly installed at one end of the upper mold 2. According to the current passed through the hysteresis brake, the hysteresis brake will generate hysteresis forces of varying sizes. The upper mold 2 is hindered by the hysteresis force when rotating. When the graphite sheet passes through the gap between the upper mold 2 and the lower mold 3, the graphite sheet is also subjected to a force opposite to the downstream pulling force, so that the protrusion 4 is more closely in contact with the edge of the graphite sheet, and the downstream equipment is rolled more tightly and neatly.

[0040] refer to Figure 1An upper mold 2 and a lower mold 3 are defined as a set of molds. To improve the bonding quality of the adhesive layer, multiple sets of molds can be provided, such as two sets, three sets or more than three sets. In the present embodiment, two sets of molds are provided. Specifically, the two sets of molds are installed on the frame 1 at intervals, and the graphite sheet needs to be pressed by the two sets of molds.

[0041] The implementation principle of a graphite edging device in an embodiment of the present application is as follows: an adjusting component 6 is installed on a frame 1, an upper mold 2 is rotatably installed in the adjusting component 6, a lower mold 3 is rotatably installed on the frame 1, a graphite sheet passes through a gap between the upper mold 2 and the lower mold 3, and the upper mold 2 and the lower mold 3 press the glue layer against the surface of the graphite sheet.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for graphite hemming, characterized in that: include Rack (1); An upper die (2) is rotatably arranged on the frame (1), and a protrusion (4) is provided on the upper die (2), and the protrusion (4) is used to press the upper glue layer onto the graphite sheet along the edge of the graphite sheet; and a lower die (3) rotatably arranged on the frame (1); a graphite sheet is arranged between the upper die (2) and the lower die (3); and the lower die (3) is used to press the lower glue layer onto the graphite sheet.

2. A graphite hemming device according to claim 1, characterized in that: The upper die (2) is a circular roller, and the protrusion (4) protrudes from the surface of the upper die (2); the lower die (3) is also a circular roller, and the graphite sheet is clamped between the upper die (2) and the lower die (3). The graphite sheet moves under the pulling force, and the upper die (2) and the lower die (3) rotate.

3. A graphite hemming device according to claim 1, characterized in that: The protrusion (4) is provided with a rounded corner (5).

4. A graphite hemming device according to claim 1, characterized in that: The height of the protrusion (4) is 0.5-2 mm.

5. The device for graphite hemming according to claim 1, characterized in that: It also includes a pre-tightening member (8), the upper mold (2) is fixedly connected to the pre-tightening member (8), and the pre-tightening member (8) is used to increase the resistance when the upper mold (2) rotates.

6. The device for graphite hemming according to claim 1, characterized in that: It also comprises an adjusting component (6), on which the upper die (2) is rotatably arranged, and the adjusting component (6) is used to control the upper die (2) to approach or move away from the lower die (3).

7. A graphite hemming device according to claim 6, characterized in that: The adjustment component (6) comprises A power element (61), used for outputting power; and a slide seat (62) which is slidably arranged on the frame (1), the upper mold (2) being rotatably arranged in the slide seat (62), the power element (61) being fixedly connected to the slide seat (62), and the power element (61) being used to drive the slide seat (62) to move.

8. The device for graphite hemming according to claim 1, characterized in that: The upper mold (2) and the lower mold (3) are provided in multiple groups and are evenly spaced on the frame (1).

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