Heat conduction graphite composite film production equipment and heat dissipation product manufactured by same

Abstract

The utility model discloses production equipment for a heat-conducting graphite composite film, which can solve the problem of layering in subsequent die cutting caused by surface powder falling after a supercrystal graphite film is calendered. In addition, the utility model also discloses a heat dissipation product manufactured by the production equipment. The heat-conducting graphite film production equipment comprises a first laminating device, a pressing device, a die cutting device, a second laminating device and a third laminating device which are sequentially arranged along the conveying direction of a super-crystal graphite film, the first laminating device is used for laminating a calendering release film on the upper surface of the super-crystal graphite film and carrying out calendering treatment on the laminated super-crystal graphite film, and the pressing device is used for re-pressing the upper surface of the super-crystal graphite film from which the calendering release film is removed and laminating a low-viscosity protective film on the lower surface of the super-crystal graphite film; the die cutting device conducts die cutting on the film material output by the pressing device, the second attaching device attaches the double-faced adhesive tape with the release film to the upper surface of the super-crystal graphite film, and the third attaching device attaches the insulating film to the lower surface of the super-crystal graphite film.

Description

Technical Field

[0001] The utility model relates to the field of heat-conducting graphite composite film production, in particular to heat-conducting graphite composite film production equipment and products made by the production equipment. Background Art

[0002] Thermally conductive graphite composite film is a relatively thin comprehensive thermally conductive material with good thermal conductivity and good processability. It is often used to shield heat sources and is mostly used for rapid heat dissipation of electronic products such as mobile phones and notebooks. In the prior art, supercrystalline graphite film has been used as a heat dissipation material. During production, the supercrystalline graphite film is calendered and formed, and then die-cut according to demand. Then, a PET release film is used as the base layer of the supercrystalline graphite film and the two are composited. However, in actual production, it is found that the surface bonding force of the supercrystalline graphite material itself is low, the surface is uneven, and it is easy to shed powder. After the calendering film is removed, the surface of the supercrystalline graphite is loose and has powder chips. After the die-cutting process and hemming, the supercrystalline graphite film is prone to stratification.

[0003] Therefore, it is necessary to provide a thermally conductive graphite composite film production device to solve the problem of delamination in subsequent die-cutting caused by powder loss on the surface of the supercrystalline graphite film after calendering to overcome the above-mentioned defects. Utility Model Content

[0004] The utility model aims to provide a thermally conductive graphite composite film production device for solving the problem of delamination in subsequent die cutting caused by powder falling off the surface of supercrystalline graphite film after calendering.

[0005] To achieve the above-mentioned purpose, the utility model provides a thermally conductive graphite composite film production device, which is suitable for the composite processing of supercrystalline graphite film. The thermal graphite composite film production device of the utility model includes a first laminating device, a pressing device, a die-cutting device, a second laminating device and a third laminating device arranged in sequence along the conveying direction of the supercrystalline graphite film, the first laminating device attaches the calendered release film to the upper surface of the supercrystalline graphite film and performs calendering treatment on the supercrystalline graphite film after laminating, the pressing device re-presses the upper surface of the supercrystalline graphite film after removing the calendered release film, and attaches a low-viscosity protective film to the lower surface of the supercrystalline graphite film, the die-cutting device performs die-cutting on the film material output from the pressing device, the second laminating device attaches the double-sided tape with the release film to the upper surface of the supercrystalline graphite film, and the third laminating device attaches the insulating film to the lower surface of the supercrystalline graphite film.

[0006] Preferably, an asynchronous peeling structure is provided between the first laminating device and the pressing device, and the asynchronous peeling structure peels off the rolled release film on the upper surface of the supercrystalline graphite film flowing out of the first laminating device.

[0007] Preferably, the first laminating device includes a first laminating roller group, a first unwinding roller and a first receiving roller, the first unwinding roller releases a calendered release film, the first laminating roller group presses the released calendered release film on the upper surface of the supercrystalline graphite film and calenders the supercrystalline graphite film, and the first receiving roller rewinds the peeled calendered release film.

[0008] Preferably, the lamination device comprises a pressure roller group, a second discharge roller and a third discharge roller, the second discharge roller and the third discharge roller respectively discharge a low-viscosity protective film, the pressure roller group presses the low-viscosity protective film on the lower surface of the supercrystalline graphite film, and rolls the supercrystalline graphite film.

[0009] Preferably, the die-cutting device includes a die-cutting roller group, and the second laminating device includes a second laminating roller group. The die-cutting roller group die-cuts the film material output from the laminating device, and the second laminating roller group laminates the double-sided tape with the release film to the upper surface of the supercrystalline graphite film.

[0010] Preferably, a second receiving roller and a fourth unloading roller are provided between the die-cutting device and the second bonding device, the fourth unloading roller discharges the double-sided tape to the second bonding roller group, and the second receiving roller is used for winding up the outer frame waste of the die-cut supercrystalline graphite film and the release film of the double-sided tape.

[0011] Preferably, the third laminating device comprises a third laminating roller group, and the third laminating roller group laminates the insulating film onto the lower surface of the supercrystalline graphite film.

[0012] Preferably, a third receiving roller is provided between the second laminating device and the third laminating device, and the third receiving roller is used for winding up the low-viscosity protective film output from the second laminating device.

[0013] Preferably, a fifth unloading roller is provided below the third laminating device, and the fifth unloading roller unloads the insulating film to the third laminating roller group.

[0014] Preferably, the first laminating roller group includes a first rubber roller and a first bottom roller arranged directly below the first rubber roller, the first rubber roller and the first bottom roller enclose a channel for conveying film materials, the pressing roller group includes a pressing roller and a second bottom roller arranged directly below the pressing roller, the pressing roller and the second bottom roller enclose a channel for conveying film materials, the die-cutting roller group includes a knife roller and a third bottom roller arranged directly below the knife roller, the knife roller and the third bottom roller enclose a channel for conveying film materials, the second laminating roller group includes a second rubber roller and a fourth bottom roller arranged directly below the second rubber roller, the second rubber roller and the fourth bottom roller enclose a channel for conveying film materials, the third laminating roller group includes a third rubber roller and a fifth bottom roller arranged directly below the third rubber roller, the third rubber roller and the fifth bottom roller enclose a channel for conveying film materials.

[0015] The utility model also provides a heat dissipation product made by the above-mentioned thermal conductive graphite composite film production equipment, and the heat dissipation product includes a release film, a double-sided adhesive, supercrystalline graphite and an insulating film stacked in sequence from top to bottom.

[0016] Compared with the prior art, the utility model attaches the calendered release film to the upper surface of the supercrystalline graphite film through the first laminating device and performs calendering on the supercrystalline graphite film after laminating. The pressing device re-presses the upper surface of the supercrystalline graphite film after the calendered release film is removed, so that the upper surface of the supercrystalline graphite film is re-pressed flat without falling powder, solves the delamination phenomenon in the subsequent die-cutting process, and makes the upper surface of the supercrystalline graphite film more firmly bonded to the double-sided adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the thermal conductive graphite composite film production equipment of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the film material structure corresponding to the first laminating device to the third laminating device of the utility model. DETAILED DESCRIPTION

[0019] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the implementation modes and the accompanying drawings.

[0020] like Figure 1 As shown, the utility model discloses a thermally conductive graphite composite film production device 100, which is suitable for the composite processing of supercrystalline graphite film, and finally a double-sided adhesive tape 02 with a release film is mounted on the upper surface of the supercrystalline graphite film 01, and an insulating film 03 is mounted on the lower surface of the supercrystalline graphite film 01. Preferably, the insulating film 03 is a PET insulating film, but it is not limited to this. The thermally conductive graphite composite film production device 100 of the utility model is used to solve the problem of stratification in subsequent die-cutting caused by powder falling off the surface of the supercrystalline graphite film after calendering. The heat dissipation product produced by the thermally conductive graphite composite film production device 100 of the utility model includes a release film, a double-sided adhesive tape, a supercrystalline graphite and an insulating film stacked in sequence from top to bottom.

[0021] The thermal conductive graphite composite film production equipment 100 of the present invention includes a first bonding device 10, a pressing device 20, a die-cutting device 30, a second bonding device 40 and a third bonding device 50 which are sequentially arranged along the conveying direction of the supercrystalline graphite film 01.

[0022] In the embodiment provided by the present utility model, from front to back (i.e. along Figure 1The supercrystalline graphite film 01 is transported in the direction indicated by the arrow X in the middle. The first laminating device 10 affixes the calendered release film 04 to the upper surface of the supercrystalline graphite film 01 and performs calendering on the supercrystalline graphite film 01 after laminating. The pressing device 20 re-presses the upper surface of the supercrystalline graphite film 01 after the calendered release film 04 is removed, so that the upper surface of the supercrystalline graphite film 01 is re-pressed flat without falling powder, so as to solve the delamination phenomenon in the subsequent die-cutting process and make the upper surface of the supercrystalline graphite film 01 more firmly bonded to the double-sided adhesive.

[0023] The laminating device 20 also attaches a low-viscosity protective film 05 to the lower surface of the supercrystalline graphite film 01, and the low-viscosity protective film 05 is used to support the supercrystalline graphite film 01. The die-cutting device 30 performs die-cutting on the film material output from the laminating device 20, and punches out the waste material of the outer frame of the supercrystalline graphite film. The second laminating device 40 attaches the double-sided tape 02 with the release film to the upper surface of the supercrystalline graphite film 01, and the third laminating device 50 attaches the insulating film 03 to the lower surface of the supercrystalline graphite film 01. The schematic diagram of the film material structure corresponding to the first laminating device 10 to the third laminating device 50 is shown in FIG. Figure 2 shown.

[0024] like Figure 1 As shown, an asynchronous peeling structure 60 is provided between the first laminating device 10 and the laminating device 20, and the asynchronous peeling structure 60 peels off the calendered release film 04 on the upper surface of the supercrystalline graphite film 01 flowing out of the first laminating roller group 11. The asynchronous peeling structure 60 has a taper angle (but not necessarily, and can be set as needed) to facilitate the discharge of the calendered release film 04. The peeling structure 60 is provided above the supercrystalline graphite film 01 transported in the front-to-back direction, but the peeling structure 60 is close to the supercrystalline graphite film 01.

[0025] like Figure 1 As shown, the first laminating device 10 includes a first laminating roller group 11, a first unwinding roller 12 and a first receiving roller 13. The first unwinding roller 12 unwinds the calendered release film 04, and the first laminating roller group 11 presses the released calendered release film 04 onto the upper surface of the supercrystalline graphite film 01, and performs calendering on the supercrystalline graphite film 01. The supercrystalline graphite film 01 transported from front to back passes through the first laminating roller group 11, and the calendered release film 04 is pressed onto the upper surface of the supercrystalline graphite film 01 by the first laminating roller group 11. The first receiving roller 13 rewinds the peeled calendered release film 04.

[0026] like Figure 1As shown, the laminating device 20 includes a pressure roller group 21, a second discharge roller 22 and a third discharge roller 23. The second discharge roller 22 and the third discharge roller 23 release the low-viscosity protective film 05 respectively, and the pressure roller group 21 presses the low-viscosity protective film 05 on the lower surface of the supercrystalline graphite film 01, and rolls the supercrystalline graphite film 01. The pressure roller group 21 is used to press the upper surface of the supercrystalline graphite film 01 from which the calendered release film 04 is peeled off again, so that the upper surface of the supercrystalline graphite film 01 becomes tight from loose, improves the surface bonding force, and effectively solves the phenomenon of powder falling on the surface of the supercrystalline graphite film 01. In the embodiment provided by the utility model, the low-viscosity protective film 05 includes two film layers, of which the upper layer is a 0-1g bottom protective film for assisting waste discharge, and the lower layer is a 3-5g bottom protective film for carrying the material belt, but is not limited to this structural form.

[0027] like Figure 1 As shown, the die-cutting device 30 includes a die-cutting roller group 31, and the second laminating device 40 includes a second laminating roller group 41. The die-cutting roller group 31 performs die-cutting on the film material output from the laminating device 20, and the second laminating roller group 41 affixes the double-sided adhesive tape 02 with a release film to the upper surface of the supercrystalline graphite film 01. After the die-cutting roller group 31 performs die-cutting on the film material, the supercrystalline graphite film 01 becomes as shown in FIG. Figure 2 The shape indicated by the arrow A. The double-sided adhesive tape with release film 02 comprises a double-sided adhesive film 021 and a release film 022 , wherein the release film 022 is disposed above the double-sided adhesive film 021 .

[0028] like Figure 1 As shown, a second receiving roller 32 and a fourth feeding roller 33 are provided above the die-cutting device 30 and the second bonding device 40. The fourth feeding roller 33 discharges the double-sided adhesive toward the second bonding roller group 41, and the second receiving roller 32 is used for winding up the outer frame waste of the die-cut supercrystalline graphite film 01 and the release film of the double-sided adhesive.

[0029] like Figure 1 As shown, the third laminating device 50 includes a third laminating roller group 51, and the third laminating roller group 51 laminates the insulating film 03 to the lower surface of the supercrystalline graphite film 01. A third receiving roller 42 is provided below the second laminating device 40 and the third laminating device 50, and the third receiving roller 42 is used to rewind the low-viscosity protective film 05 output from the second laminating device 40. A fifth unwinding roller 52 is provided below the third laminating device 50, and the fifth unwinding roller 52 unwinds the insulating film 03 to the third laminating roller group 51.

[0030] like Figure 1As shown, the first laminating roller group 11 includes a first rubber roller 111 and a first bottom roller 112 arranged directly below the first rubber roller 111, and the first rubber roller 111 and the first bottom roller 112 surround a channel for conveying film materials. The pressing roller group 21 includes a pressing roller 211 and a second bottom roller 212 arranged directly below the pressing roller 211, and the pressing roller 211 and the second bottom roller 212 surround a channel for conveying film materials. Preferably, the pressing roller 211 is selected as a rubber roller or a steel rod, and a layer of foam is wrapped on the surface. The pressure of the pressing roller 211 on the supercrystalline graphite film 01 cannot be too light. If the pressure is too light, the powder falling on the surface will not be improved. If the pressure is too high, the supercrystalline graphite film 01 will crack. The die-cutting roller group 31 includes a knife roller 311 and a third bottom roller 312 arranged directly below the knife roller 311. The knife roller 311 and the third bottom roller 312 surround a channel for conveying film materials. The second laminating roller group 41 includes a second rubber roller 411 and a fourth bottom roller 412 located directly below the second rubber roller 411, and the second rubber roller 411 and the fourth bottom roller 412 surround a channel for conveying film materials. The third laminating roller group 51 includes a third rubber roller 511 and a fifth bottom roller 512 located directly below the third rubber roller 511, and the third rubber roller 511 and the fifth bottom roller 512 surround a channel for conveying film materials. It is worth pointing out that all the above channels are on the same horizontal straight line. Preferably, the first laminating roller group 11, the pressure roller group 21, the die-cutting roller group 31, the second laminating roller group 41 and the third laminating roller group 51 are all driven to rotate by different power bottom rollers 70, for example, they can be driven to rotate by belt, chain or gear group transmission.

[0031] The following is a brief introduction to the processing process of the thermal conductive graphite composite film production equipment 100 of the utility model: the sheet supercrystalline graphite film 01 is continuously fed into the first laminating roller group 11 at intervals of about 1-3 mm, the first unwinding roller 12 releases the calendered release film 04, the first laminating roller group 11 presses the released calendered release film 04 on the upper surface of the supercrystalline graphite film 01, and calenders the supercrystalline graphite film 01. After the output film material flows backward to the asynchronous peeling structure 60, the asynchronous peeling structure 60 peels off the calendered release film 04 on the upper surface of the supercrystalline graphite film 01 flowing out of the first laminating roller group 11. The second unloading roller 22 and the third unloading roller 23 release the low-viscosity protective film 05 respectively, and the pressing roller group 21 presses the low-viscosity protective film 05 on the lower surface of the supercrystalline graphite film 01, and rolls the upper surface of the supercrystalline graphite film 01. The upper surface of the composite supercrystalline graphite film 01 becomes compact, which improves the surface bonding force and effectively solves the phenomenon of powder falling on the surface of the supercrystalline graphite film 01. The die-cutting roller group 31 die-cuts the film material output from the laminating device 20, and the fourth unloading roller 33 releases the double-sided adhesive to the second bonding roller group 41. The second bonding roller group 41 bonds the double-sided adhesive 02 with the release film to the upper surface of the supercrystalline graphite film 01. The second receiving roller 32 is used to roll up the outer frame waste of the die-cut supercrystalline graphite film 01 and the release film of the double-sided adhesive, and the third receiving roller 42 is used to roll up the low-viscosity protective film output from the second bonding roller group 41. The fifth unloading roller 52 releases the insulating film 03 to the third bonding roller group 51 , and the third bonding roller group 51 bonds the insulating film 03 to the lower surface of the supercrystalline graphite film 01 , and the final output product realizes the hemming of the supercrystalline graphite film 01 .

[0032] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are within the scope of the present invention.

Claims

1. A thermal conductive graphite composite film production equipment, suitable for composite processing of supercrystalline graphite film, characterized in that: The invention comprises a first bonding device, a pressing device, a die-cutting device, a second bonding device and a third bonding device which are sequentially arranged along the conveying direction of the supercrystalline graphite film. The first bonding device sticks a calendered release film to the upper surface of the supercrystalline graphite film and performs calendering treatment on the supercrystalline graphite film after the bonding. The pressing device re-presses the upper surface of the supercrystalline graphite film after the calendered release film is removed, and sticks a low-viscosity protective film to the lower surface of the supercrystalline graphite film. The die-cutting device die-cuts the film material output from the pressing device. The second bonding device sticks a double-sided tape with a release film to the upper surface of the supercrystalline graphite film. The third bonding device sticks an insulating film to the lower surface of the supercrystalline graphite film.

2. The thermal conductive graphite composite film production equipment according to claim 1, characterized in that: An asynchronous peeling structure is provided between the first laminating device and the pressing device, and the asynchronous peeling structure peels off the rolled release film on the upper surface of the supercrystalline graphite film flowing out of the first laminating device.

3. The thermal conductive graphite composite film production equipment according to claim 1, characterized in that: The first laminating device includes a first laminating roller group, a first unwinding roller and a first receiving roller. The first unwinding roller releases a calendered release film. The first laminating roller group presses the released calendered release film onto the upper surface of the supercrystalline graphite film and performs calendering on the supercrystalline graphite film. The first receiving roller rewinds the peeled calendered release film.

4. The thermal conductive graphite composite film production equipment according to claim 3, characterized in that: The lamination device comprises a pressing roller group, a second unloading roller and a third unloading roller, wherein the second unloading roller and the third unloading roller respectively release a low-viscosity protective film, and the pressing roller group presses the low-viscosity protective film on the lower surface of the supercrystalline graphite film and rolls the supercrystalline graphite film.

5. The thermal conductive graphite composite film production equipment according to claim 4, characterized in that: The die-cutting device includes a die-cutting roller group, and the second laminating device includes a second laminating roller group. The die-cutting roller group die-cuts the film material output from the laminating device, and the second laminating roller group laminates the double-sided tape with the release film to the upper surface of the supercrystalline graphite film.

6. The thermal conductive graphite composite film production equipment according to claim 5, characterized in that: A second receiving roller and a fourth unloading roller are provided between the die-cutting device and the second bonding device. The fourth unloading roller discharges double-sided adhesive tape to the second bonding roller group, and the second receiving roller is used for winding up the outer frame waste of the die-cut supercrystalline graphite film and the release film of the double-sided adhesive tape.

7. The thermal conductive graphite composite film production equipment according to claim 5, characterized in that: The third laminating device includes a third laminating roller group, and the third laminating roller group laminates the insulating film on the lower surface of the supercrystalline graphite film.

8. The thermal conductive graphite composite film production equipment according to claim 1, characterized in that: A third receiving roller is provided between the second laminating device and the third laminating device, and the third receiving roller is used for winding up the low-viscosity protective film output from the second laminating device.

9. The thermal conductive graphite composite film production equipment according to claim 7, characterized in that: A fifth unloading roller is disposed below the third laminating device, and the fifth unloading roller unloads the insulating film to the third laminating roller group.

10. The thermal conductive graphite composite film production equipment according to claim 7, characterized in that: The first laminating roller group includes a first rubber roller and a first bottom roller arranged directly below the first rubber roller, and the first rubber roller and the first bottom roller surround a channel for conveying film materials. The pressing roller group includes a pressing roller and a second bottom roller arranged directly below the pressing roller, and the pressing roller and the second bottom roller surround a channel for conveying film materials. The die-cutting roller group includes a knife roller and a third bottom roller arranged directly below the knife roller, and the knife roller and the third bottom roller surround a channel for conveying film materials. The second laminating roller group includes a second rubber roller and a fourth bottom roller arranged directly below the second rubber roller, and the second rubber roller and the fourth bottom roller surround a channel for conveying film materials. The third laminating roller group includes a third rubber roller and a fifth bottom roller arranged directly below the third rubber roller, and the third rubber roller and the fifth bottom roller surround a channel for conveying film materials.

11. A heat dissipation product manufactured by the thermally conductive graphite composite film production equipment according to any one of claims 1 to 10, the heat dissipation product comprising a release film, a double-sided adhesive tape, supercrystalline graphite and an insulating film stacked in sequence from top to bottom.

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