Graphite film die-cut frame waste removal method and graphite film extraction knife

Abstract

The application discloses a graphite film die-cutting frame waste removal method and a graphite film extraction knife, and relates to the technical field of graphite film die-cutting, and particularly relates to a graphite film die-cuting frame waste removal method and a graphite film extraction knife.

Description

Technical Field

[0001] This invention relates to the field of graphite die-cutting technology, and in particular to a method for removing waste material from the edge of a graphite film die-cutting process and a graphite film extraction knife. Background Technology

[0002] Currently, in the die-cutting process of artificially synthesized graphite film products, the graphite film needs to be punched into a predetermined shape. After punching, edge waste is left behind, which needs to be removed to achieve continuous production. Because graphite film is soft and not resistant to stretching, single-layer graphite material is easily broken during waste removal. Existing technology uses an additional second protective film as a reinforcing material, utilizing this second protective film to remove the edge waste. However, this method requires an extra protective film in the existing process, increasing costs and reducing die-cutting efficiency; it also results in more waste, with a higher probability of the waste ultimately entering the finished product; furthermore, during graphite film die-cutting, the graphite film is punched together with the first protective film, and the waste from the first protective film cannot be completely carried away by the second protective film, thus entering the interlayer structure of the graphite film product and causing product performance failure.

[0003] In view of this, it is necessary to further improve the current method for removing waste from the edge of graphite film die-cutting. Summary of the Invention

[0004] To solve at least one of the above-mentioned technical problems, the main objective of this invention is to provide a method for removing waste material from the die-cutting border of a graphite film and a graphite film extraction knife.

[0005] To achieve the above objectives, one technical solution adopted by the present invention is: providing a method for removing waste material from the die-cutting edge of graphite film, comprising:

[0006] Prepare an artificial graphite film to be die-cut;

[0007] A first low-tack protective film is attached to one side of the artificial graphite film;

[0008] The side of the artificial graphite film away from the first low-viscosity protective film is punched to divide the artificial graphite film into a product graphite area and a graphite edge waste area.

[0009] A transparent tape is placed on one side of the punched artificial graphite film, and the transparent tape is adhered to the graphite frame waste area;

[0010] Peel off the transparent tape to remove the graphite border waste, leaving the graphite area of ​​the product.

[0011] Specifically, the step of bonding the transparent tape to the graphite frame waste area includes:

[0012] A pre-set extraction blade that can be rolled into a ring is provided. The extraction blade includes an extraction block and a mold cavity recessed in the middle of the extraction block. The extraction block corresponds to the graphite edge waste area, and the mold cavity corresponds to the product graphite area.

[0013] The extraction block of the extraction knife is pressed onto the graphite frame waste, and the mold cavity of the extraction knife is aligned with the graphite area of ​​the product so that the transparent tape is adhered to the graphite frame waste area.

[0014] The thickness of the extraction block is 1-20 mm, and the depth of the mold cavity is greater than or equal to 6 mm.

[0015] The number of mold cavities is multiple, and the multiple mold cavities are divided into at least two rows, with at least two mold cavities in each row.

[0016] The artificial graphite film includes a graphite film and a PET layer disposed on the graphite film.

[0017] The step of punching the side of the artificial graphite film away from the first low-viscosity protective film to divide the artificial graphite film into a product graphite area and a graphite edge waste area specifically includes:

[0018] A pre-set inner frame cutter is provided, which is set to correspond to the graphite area of ​​the product;

[0019] The inner frame cutter is used to punch the PET layer at the boundary line between the graphite area of ​​the product and the graphite edge waste area to form the PET area and the product graphite area, wherein the product graphite area is located in the middle of the PET area.

[0020] The edge of the PET region extends 0.3-1.0 mm beyond the edge of the graphite region of the product.

[0021] To achieve the above objectives, one technical solution adopted by the present invention is as follows: a graphite film extraction knife is provided, comprising: a knife body, wherein the knife body is recessed with a mold cavity for accommodating graphite products, and an extraction block surrounding the mold cavity, wherein the extraction block has an extraction surface for pressing transparent tape onto the graphite frame waste area, the mold cavity has an opening to prevent the transparent tape from contacting the graphite area of ​​the product, and the extraction surface and the opening are disposed on the same side.

[0022] The number of mold cavities is multiple, and the multiple mold cavities are divided into at least two rows or columns, with each row or column containing at least two mold cavities.

[0023] The graphite film extraction blade further includes: a first connecting block connecting two adjacent rows or columns of mold cavities, and a second connecting block connecting adjacent mold cavities in the same row or column, wherein the first connecting block and the second connecting block are interconnected.

[0024] The thickness of the extraction block is 1-20 mm, and the depth of the mold cavity is greater than or equal to 6 mm.

[0025] The technical solution of this invention mainly involves first preparing an artificial graphite film to be die-cut, then attaching a first layer of low-tack protective film to one side of the artificial graphite film, and punching the side of the artificial graphite film away from the first layer of low-tack protective film to divide the artificial graphite film into a product graphite area and a graphite edge waste area. A transparent tape is placed on the punched side of the artificial graphite film and adhered to the graphite edge waste area. Finally, the transparent tape is peeled off to remove the graphite edge waste, leaving the product graphite area. In this way, costs can be reduced, die-cutting efficiency can be improved, and waste material entering the product graphite area can be reduced, thus improving the performance of cost-effective graphite. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a flowchart of a method for removing waste material from the die-cut edge of a graphite film according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram showing the stacking of the PET region and the product graphite in one embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a graphite membrane extraction knife according to an embodiment of the present invention;

[0030] Figure 4 For the present invention Figure 3 Sectional view at point AA.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0034] Unlike existing technologies that use an additional second protective film as a reinforcing material to remove graphite frame waste, resulting in higher costs and poorer performance of the finished graphite product, this invention provides a method for removing graphite film die-cutting frame waste. The specific steps of this method are described in the following embodiments.

[0035] Please refer to Figure 1 , Figure 1 This is a flowchart of a method for removing waste from the die-cutting border of a graphite film according to an embodiment of the present invention. In this embodiment, the method includes the following steps: S110, preparing an artificial graphite film to be die-cut; S120, attaching a first layer of low-adhesion protective film to one side of the artificial graphite film; S130, punching the side of the artificial graphite film away from the first layer of low-adhesion protective film to divide the artificial graphite film into a product graphite area and a graphite border waste area; S140, applying transparent tape to the punched side of the artificial graphite film and adhering the transparent tape to the graphite border waste area; S150, tearing off the transparent tape to remove the graphite border waste, leaving the product graphite area.

[0036] When die-cutting graphite film, a pre-selected artificial graphite film to be die-cut is first placed. A first layer of low-tack protective film is then adhered to one side of the artificial graphite film. The artificial graphite film is then punched into a product graphite area and a graphite frame waste area. Transparent tape is then used to adhere the product graphite area, while the tape detaches from the product graphite area. The tape is then peeled off to remove the graphite frame waste, leaving the product graphite area. This reduces costs, improves die-cutting efficiency, and reduces waste entering the product graphite area, thus improving the performance of the graphite. Specifically, after obtaining the product graphite area, this method also includes applying double-sided tape, removing the first layer of protective film waste by removing the second layer of low-tack protective film, applying single-sided tape, die-cutting the graphite film frame, removing the frame waste, and finally collecting the finished product.

[0037] In one specific embodiment, the step of bonding the transparent tape to the graphite frame waste area specifically includes:

[0038] A pre-set extraction blade that can be rolled into a ring is provided. The extraction blade includes an extraction block and a mold cavity recessed in the middle of the extraction block. The extraction block corresponds to the graphite edge waste area, and the mold cavity corresponds to the product graphite area.

[0039] The extraction block of the extraction knife is pressed onto the graphite frame waste, and the mold cavity of the extraction knife is aligned with the graphite area of ​​the product so that the transparent tape is adhered to the graphite frame waste area.

[0040] In this embodiment, the extraction blade includes an extraction block and a mold cavity. The extraction block corresponds to the graphite frame waste area, and the mold cavity corresponds to the product graphite area. During pressing, the extraction block directly presses against the graphite frame waste area, directly adhering the transparent tape to the graphite frame waste area. The mold cavity isolates the transparent tape from the graphite product area, preventing the transparent tape from adhering to the product graphite area. Thus, the transparent tape is torn off to remove the graphite frame waste, leaving the product graphite area.

[0041] Furthermore, the thickness of the extraction block is 1-20 mm, and the depth of the mold cavity is greater than or equal to 6 mm. In this embodiment, the thickness of the extraction block can be 1 mm, 5 mm, 10 mm, 15 mm, or 20 mm. The depth of the mold cavity can be 6 mm, 8 mm, or 10 mm.

[0042] Furthermore, the number of cavities is multiple, and these cavities are arranged in at least two rows or two columns, with each row or column containing at least two cavities. Considering die-cutting efficiency, the number of cavities in this embodiment can be flexibly set as needed. The number of cavities can be distributed in a matrix, thus allowing for the die-cutting of multiple graphite products at once, while also ensuring the continuity of the die-cutting process, thereby improving the die-cutting efficiency of the graphite film.

[0043] In one specific embodiment, the artificial graphite film includes a graphite film and a PET layer disposed on the graphite film. The step of punching the side of the artificial graphite film away from the first low-tack protective film to divide the artificial graphite film into a product graphite area and a graphite edge waste area specifically includes:

[0044] A pre-set inner frame cutter is provided, which is set to correspond to the graphite area of ​​the product;

[0045] The inner frame cutter is used to punch the PET layer at the boundary line between the graphite area of ​​the product and the graphite edge waste area to form the PET area and the product graphite area, wherein the product graphite area is located in the middle of the PET area.

[0046] Please refer to Figure 2 , Figure 2This is a schematic diagram of the stacking of the PET region and the product graphite according to an embodiment of the present invention. In this embodiment, the PET region 220 and the product graphite region 230 are punched using an inner frame cutter. The product graphite region 230 is located in the middle of the PET region 220, that is, the area of ​​the middle part of the PET region 220 is larger than that of the product graphite region 230. Then, transparent tape is used to bond the PET region 220 and the graphite frame waste area. After the transparent tape is peeled off, the graphite frame waste is removed using the peeled transparent tape, leaving the product graphite region.

[0047] In one specific embodiment, the edge of the PET region extends 0.3-1.0 mm beyond the edge of the product graphite region. In this embodiment, the distance by which the edge of the PET region extends beyond the edge of the product graphite region can be 0.3, 0.6, or 1.0 mm, thus ensuring that the PET region completely blocks the product graphite region.

[0048] Please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of a graphite membrane extraction knife according to an embodiment of the present invention; Figure 4 For the present invention Figure 3 A cross-sectional view of AA. In an embodiment of the present invention, the graphite film extraction knife includes: a knife body 100, the knife body 100 having a recessed cavity 120 for receiving a graphite product, and an extraction block 110 surrounding the cavity 120, the extraction block 110 having an extraction surface 111 for pressing transparent tape onto the graphite edge waste area, the cavity 120 having an opening 121 to prevent the transparent tape from contacting the graphite area of ​​the product, and the extraction surface 111 and the opening 121 being disposed on the same side.

[0049] In this embodiment, the specific shape of the extraction block 110 can be set according to actual requirements. The number and size of the mold cavity 120 can be designed according to actual requirements. During operation, the extraction surface 111 of the extraction block 110 directly abuts against the transparent tape and presses the transparent tape onto the graphite frame waste area. When the extraction block 110 presses the transparent tape, the opening 121 of the mold cavity 120 isolates the transparent tape from the graphite area of ​​the product, preventing them from sticking together. Thus, when the transparent tape is torn off, the graphite frame waste is removed using the torn transparent tape, leaving the graphite area of ​​the product, which can improve the separation effect between the graphite frame waste area and the graphite area of ​​the product.

[0050] In one specific embodiment, there are multiple cavities 120, arranged in at least two rows or two columns. In this embodiment, since the cavities 120 correspond to the graphite areas of the product, arranging multiple cavities 120 in rows or columns allows for simultaneous pressing of graphite edge waste areas in the same row or column during processing, improving die-cutting efficiency. Furthermore, each row of cavities 120 contains at least two cavities. Considering die-cutting efficiency, in this embodiment, the number of cavities 120 in the same row or column can be flexibly set as needed, thus ensuring process continuity and improving die-cutting efficiency. In a preferred embodiment, the number of cavities 120 can be distributed in a matrix, allowing for the die-cutting of multiple graphite products at once while maintaining process continuity and further improving the die-cutting efficiency of the graphite film.

[0051] Furthermore, the graphite film extraction blade also includes: a first connecting block 131 connecting two adjacent rows or columns of the mold cavity 120, and a second connecting block 132 connecting adjacent mold cavities 120 in the same row or column, wherein the first connecting block 131 and the second connecting block 132 are interconnected.

[0052] In this embodiment, the first connecting block 131, the second connecting block 132, and the extraction block 110 can divide each mold cavity 120 into individual areas, thereby avoiding the connection of adjacent graphite areas and improving the quality of the product graphite. Furthermore, the first connecting block 131 and the second connecting block 132 are interconnected, resulting in a more compact structure and uniform spacing between the mold cavities 120. It is understood that the connection method between the first connecting block 131 and the second connecting block 132 can be perpendicular or intersecting; the specific structure can be set according to the actual product. Further, both the first connecting block 131 and the second connecting block 132 have a pressing surface 133, which is planar with the extraction surface 111. The planar arrangement of the pressing surface and the extraction surface 111 ensures that the area corresponding to the graphite frame waste area of ​​the transparent tape is fully pressed together, allowing for full contact between the transparent tape and the graphite frame waste area, thus improving the separation effect between the graphite frame waste area and the product graphite area. Furthermore, the inner wall of the mold cavity 120 expands outward in a direction away from the graphite product, and a gap is formed between the inner wall of the mold cavity and the graphite product. In this design, the distance of this gap is 0.5-1mm, which ensures the integrity of the graphite product.

[0053] Furthermore, the thickness of the extraction block 110 is 1-20 mm, and the depth of the mold cavity 120 is greater than or equal to 6 mm. In this embodiment, the thickness of the extraction block 110 can be 1 mm, 5 mm, 10 mm, 15 mm, or 20 mm. The depth of the mold cavity 120 can be 6 mm, 8 mm, or 10 mm.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for removing waste material from the edge of a graphite film die-cutting process, characterized in that, The method for removing waste material from the die-cut edge of the graphite film includes: Prepare an artificial graphite film to be die-cut; A first low-tack protective film is attached to one side of the artificial graphite film; The side of the artificial graphite film away from the first low-viscosity protective film is punched to divide the artificial graphite film into a product graphite area and a graphite edge waste area. A transparent tape is placed on one side of the punched artificial graphite film, and the transparent tape is adhered to the graphite frame waste area; Peel off the transparent tape to remove the graphite frame waste, leaving the graphite area of ​​the product; the step of adhering the transparent tape to the graphite frame waste area specifically includes: A pre-set extraction blade that can be rolled into a ring is provided. The extraction blade includes an extraction block and a mold cavity recessed in the middle of the extraction block. The extraction block corresponds to the graphite edge waste area, and the mold cavity corresponds to the product graphite area. The extraction block of the extraction knife is pressed onto the graphite frame waste, and the mold cavity of the extraction knife is aligned with the graphite area of ​​the product so that the transparent tape is adhered to the graphite frame waste area.

2. The method for removing waste from graphite film die-cutting edges as described in claim 1, characterized in that, The thickness of the extraction block is 1-20mm, and the depth of the mold cavity is greater than or equal to 6mm.

3. The method for removing waste from graphite film die-cutting edges as described in claim 1, characterized in that, The number of mold cavities is multiple, and the multiple mold cavities are divided into at least two rows or two columns, with each row or column containing at least two mold cavities.

4. The method for removing waste from graphite film die-cutting edges as described in claim 1, characterized in that, The artificial graphite film includes a graphite film and a PET layer disposed on the graphite film. The process of punching the side of the artificial graphite film away from the first low-tack protective film to divide the artificial graphite film into a product graphite area and a graphite edge waste area specifically includes: A pre-set inner frame cutter is provided, which is set to correspond to the graphite area of ​​the product; The inner frame cutter is used to punch the PET layer at the boundary line between the graphite area of ​​the product and the graphite edge waste area to form the PET area and the product graphite area, wherein the product graphite area is located in the middle of the PET area.

5. The method for removing waste from graphite film die-cutting edges as described in claim 4, characterized in that, The edge of the PET region extends 0.3-1.0 mm beyond the edge of the graphite region of the product.

6. A graphite membrane extraction knife, characterized in that, The graphite film extraction knife includes: a knife body, the knife body having a recessed cavity for accommodating graphite products, and an extraction block surrounding the cavity, the extraction block having an extraction surface for pressing transparent tape onto the graphite frame waste area, the cavity having an opening to prevent the transparent tape from contacting the graphite area of ​​the product, and the extraction surface and the opening being disposed on the same side.

7. The graphite membrane extraction knife as described in claim 6, characterized in that, The number of mold cavities is multiple, and the multiple mold cavities are divided into at least two rows or two columns, with each row or column containing at least two mold cavities.

8. The graphite membrane extraction knife as described in claim 7, characterized in that, The graphite film extraction blade further includes: a first connecting block connecting two adjacent rows or columns of the mold cavity, and a second connecting block connecting adjacent mold cavities in the same row or column, wherein the first connecting block and the second connecting block are interconnected.

9. The graphite membrane extraction knife as described in claim 7, characterized in that, The thickness of the extraction block is 1-20mm, and the depth of the mold cavity is greater than or equal to 6mm.

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