CN112277327A - Graphite or graphene product and edge covering method thereof - Google Patents
Graphite or graphene product and edge covering method thereof Download PDFInfo
- Publication number
- CN112277327A CN112277327A CN202010999961.3A CN202010999961A CN112277327A CN 112277327 A CN112277327 A CN 112277327A CN 202010999961 A CN202010999961 A CN 202010999961A CN 112277327 A CN112277327 A CN 112277327A
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- Prior art keywords
- graphite
- graphene
- insulating film
- main surface
- product
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 51
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 51
- 239000010439 graphite Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000009957 hemming Methods 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 73
- 230000008569 process Effects 0.000 description 10
- 238000009413 insulation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000013329 compounding Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/744—Joining plastics material to non-plastics material to elements other than metals
- B29C66/7444—Carbon
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3406—Components, e.g. resistors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
A hemming method of a graphite or graphene-like product, comprising: attaching an insulating film to one main surface of the graphite or graphene product, folding the insulating film to the other main surface in a reverse mode, wrapping the side face, and then adhering the other main surface through back glue to form a wrapping edge; the main surface is not limited to the thickness but is a surface in which the length and width of the graphite or graphene-based product are limited. The method is particularly suitable for wrapping of graphite and graphene products with relatively thick thickness, can avoid the reduction of the size of an original film caused by wrapping so as to reduce the heat dissipation effect, can ensure the wrapping effect, and has the advantages of strong reliability, attractive appearance and no problem of curling or bonding together in the conventional wrapping scheme.
Description
Technical Field
The invention relates to the technical field of packaging of electronic heat dissipation products, in particular to a graphite or graphene product and a wrapping method thereof.
Background
At present, graphite and graphene materials are used in electronic heat dissipation products, especially in terminal products. Since such materials are not insulated, in order to avoid the short circuit of the circuit board caused by the powder or chip dropping of the materials, such risks are usually avoided by means of edge covering. For thin film products, an insulating film (mylar or PET, etc.) is usually bonded with a back adhesive, the size of the insulating film is slightly larger than that of an original film body (for example, the size of a single side is 1-2 mm larger), and a wrapping mode of sealing a graphite or graphene original film inside is adopted. A typical edge cover design is shown, for example, in fig. 1, which is a top view, wherein the shaded area is the edge cover area where the insulating film is attached to the back adhesive after being stretched out of the original film.
However, this edge covering process is not suitable for graphite and graphene products with relatively large thickness. For example, as shown in fig. 2, when the original film thickness of the product is 1mm, the conventional edge covering width is 1-2 mm, so that the insulating film and the back adhesive are adhered together at a certain oblique angle. And the effective length of bonding is shorter, and the bonding effect is greatly influenced. If the edge covering effect is good, and the insulating film and the back adhesive are well bonded, the size of the single-side lengthened edge covering is required to be 3-4 mm. The actual original membrane size of product has reduced 6 ~ 8mm like this, and is very big to the influence of radiating effect. Moreover, the longer edge covering causes problems such as curling and the like, and the appearance is relatively unsightly. Therefore, a new edge covering process is needed, which can ensure the edge covering effect, has no influence or little influence on the heat dissipation size, and can keep better appearance.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method for covering edges of graphite or graphene products, so as to at least partially solve the above technical problems.
In order to achieve the above object, as one aspect of the present invention, there is provided a hemming method of a graphite or graphene-based product, comprising the steps of:
attaching an insulating film to one main surface of the graphite or graphene product, folding the insulating film to the other main surface in a reverse mode, wrapping the side face, and then adhering the other main surface through back glue to form a wrapping edge; the main surface is not limited to the thickness but is a surface in which the length and width of the graphite or graphene-based product are limited.
Wherein the insulating film has no overlapping portion in the edge formed on the side surface and the other main surface.
The four corners of the insulating film are cut into the dividing slits through the die-cutting rule simultaneously or repeatedly, so that the insulating films cannot interfere with each other when being turned over.
In the step of cutting the insulation film by the die-cutting tool, the insulation film is positioned by a jig, the jig is provided with a concave area which is equal to or 0.1-1 mm larger than the graphite or graphene product in size, when the insulation film is attached to one main surface of the graphite or graphene product, the insulation film is placed into the concave area of the jig, the insulation film which is wider than the main surface of the graphite or graphene product in area is turned over along the side surface of the graphite or graphene product by the side wall of the concave area, and then the insulation film is sequentially pressed and adhered to the back glue on the other main surface of the graphite or graphene product to form an edge covering with adjustable width.
Wherein the width of the wrapping edge is 1-3 mm.
Wherein the thickness of the graphite or graphene product is more than or equal to 0.5 mm.
As another aspect of the invention, the invention also provides a graphite or graphene product prepared by the edge covering method.
Based on the technical scheme, compared with the prior art, the graphite or graphene product and the edge covering method have at least one of the following beneficial effects:
the invention can be used for the edge covering process of graphite or graphene products, and is particularly suitable for the edge covering of the graphite and graphene products with thicker thickness (such as more than or equal to 0.5 mm);
the edge covering of the invention has the same size as the original film body, thus avoiding the reduction of the original film size caused by the edge covering, and further avoiding the reduction of the heat dissipation effect;
according to the invention, the original film is wrapped inside the insulating film and the back glue, and the insulating film and the back glue are firmly bonded, so that the edge covering effect of a thicker graphene or graphite product can be ensured, and the reliability is strong;
the edge covering of the invention has beautiful appearance and does not have the problem of curling or bonding together in the conventional edge covering scheme.
Drawings
FIG. 1 is a schematic top view of a hemming style common in the prior art;
FIG. 2 is a schematic side view of a prior art hemming procedure showing a defect;
FIG. 3 is a schematic side view of a film for edge wrapping according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of die cutting of a hem film according to an embodiment of the invention;
fig. 5 is a top view of a jig in a hemming process according to an embodiment of the present invention;
fig. 6 is a schematic view of the back surface of the edge covering process of the embodiment of the invention when the jig is used to adhere the insulating film.
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
The invention discloses a method for wrapping graphite or graphene products, which specifically comprises the following steps:
attaching an insulating film to one main surface of the graphite or graphene product, folding the insulating film to the other main surface in a reverse manner, wrapping the side surface, and adhering the other main surface through a back adhesive to form a wrapping edge with the width of 1-3 mm; the main surface is not limited to the thickness but is a surface in which the length and width of the graphite or graphene-based product are limited.
The edges of the insulating films on the side surface and the other main surface can be overlapped, for example, the insulating films on two opposite sides are firstly pressed on the side surface, and then the insulating films on the other two adjacent sides are pressed together to form a 45-degree laminated layer. The same is true on the other main surface, the insulating layer on one side is pressed first, and then the other surfaces are pressed in sequence.
The above steps are completed by automatic or semi-automatic operations, for example, a workbench (jig) is matched with a die to position the graphite or graphene product; then the insulating films on all sides are folded through the folding plates.
In the above step, for example, four cuts are simultaneously or repeatedly cut at the edge of the diagonal line of the insulating film by a plurality of cutting tools, so that the insulating films are not interfered with each other when being folded, and the insulating films are not curled or bonded together to affect the appearance of the side surface package.
The process is positioned by a jig, for example, the jig is provided with a concave surface with the same size as or slightly larger than the graphite or graphene original film, when the insulating film is attached to one main surface of the graphite or graphene product, the insulating film is placed into the concave surface of the jig, the side wall of the concave surface enables the insulating film wider than the graphite or graphene original film to be folded along the side surface of the graphite or graphene product, then the insulating film is sequentially pressed, and the back glue is attached to the other main surface of the graphite or graphene product to form a wrapping edge with adjustable width, wherein the width is 1-3 mm, for example.
The technical solution of the present invention is further illustrated by the following specific embodiments in combination with the accompanying drawings. It should be noted that the technical details in the following embodiments are only for illustration and are not used to limit the present invention.
Example 1
The invention develops a hemming process which is mainly used for hemming thicker original film materials. The method comprises the steps of die-cutting graphene or a graphite original film and a back adhesive into the same size, compounding an insulating film, and die-cutting an insulating film (with the back adhesive) to keep the insulating film to be 2-4 mm larger than the single-side size of the original film.
And sequentially turning the insulating films on different sides to the other side of the graphene or graphite original film, overlapping the rest part on the side surface, sequentially turning the insulating films on the back surface of the graphene or graphite original film, and pressing the rest insulating film on the back adhesive side to form a 1-3 mm wide edge.
It should be noted that the redundant insulating films are folded and contracted into a cube completely attached to each edge without cutting when the different edges are folded, so that the phenomenon that the insulating films are curled or irregular on the side faces to affect the appearance or even leave residues leaking out of graphite or graphene is avoided.
Therefore, through the edge covering process of the graphene or graphite product, the insulating film for edge covering can be attached to the other side of the product by bypassing the peripheral side edges from one side of the product.
Example 2
The invention also develops a wrapping process which is mainly used for wrapping thicker original film materials. Firstly, die-cutting graphene or a graphite original film and a back adhesive into the same size, then compounding an insulating film, and then die-cutting an insulating film (the insulating film is provided with the back adhesive), wherein the size of the remaining insulating film is 2-3 mm more than that of the original film on one side, as shown in figure 3.
There are many die-cutting patterns, which can be simply a slit at each overlapping portion, or as shown in fig. 4, the insulating film can be die-cut into a specific shape at four corners, facilitating the subsequent pressing of the excess insulating film on the adhesive side.
The material is then automatically or semi-automatically removed by a robotic device and placed in a custom jig (jig shown in fig. 5).
The opening of the jig is the same as the size of the graphene or graphite original film, and the product is reversely pressed into the jig. Then, the extra insulating film on the periphery is pressed on the four sides of the original film with the back adhesive surface by a tool such as a jig or a stamping die. This creates the effect of the insulating film wrapping longitudinally around the graphene or graphene original film and on the bottom adhesive side, as shown in fig. 6.
Therefore, through the edge covering process of the graphene or graphite product, the insulating film for edge covering can be attached to the other side of the product by bypassing the peripheral side edges from one side of the product.
The present invention includes, but is not limited to, the above-mentioned scheme for realizing edge covering, and other methods, whether manual, automatic or semi-automatic, may also be adopted, as long as the edge covering scheme is similar to the present invention, and is within the protection scope of the scheme.
The present invention includes, but is not limited to, the above-described pattern of attaching to the adhesive-backed side, and the insulating film may be attached to another side, for example, the front side, as long as it bypasses the side edges. Therefore, the protection range of the scheme is no matter how the shape and the style of the other side is attached.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for binding graphite or graphene products is characterized by comprising the following steps:
attaching an insulating film to one main surface of the graphite or graphene product, folding the insulating film to the other main surface in a reverse mode, wrapping the side face, and then adhering the other main surface through back glue to form a wrapping edge; the main surface is not limited to the thickness but is a surface in which the length and width of the graphite or graphene-based product are limited.
2. The method according to claim 1, wherein the insulating film is formed with no overlapping portion in the covered edge formed on the side surface and the other main surface.
3. The method according to claim 1 or 2, wherein the four corners of the insulating film are cut simultaneously or a plurality of times by a die cutter to form the dividing slits so as not to interfere with each other when the insulating film is reverse-folded.
4. The method as claimed in claim 3, wherein in the step of cutting the insulating film by the die-cutting blade, the insulating film is positioned by a jig having a recessed region having a size equal to or larger than 0.1 to 1mm, and the insulating film is placed in the recessed region of the jig when the insulating film is attached to one main surface of the graphite or graphene product, and the insulating film having a wider area than the main surface of the graphite or graphene product is turned over along the side surface of the graphite or graphene product by the side wall of the recessed region, and then sequentially pressed and attached to the back adhesive on the other main surface of the graphite or graphene product, thereby forming a hem having an adjustable width.
5. The method of claim 1, 2 or 4, wherein the hem has a width of 1 to 3 mm.
6. The method of claim 1, 2 or 5, wherein the graphite or graphene-like product has a thickness of 0.5mm or more.
7. A graphite or graphene product produced by a hemming method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010999961.3A CN112277327A (en) | 2020-09-21 | 2020-09-21 | Graphite or graphene product and edge covering method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010999961.3A CN112277327A (en) | 2020-09-21 | 2020-09-21 | Graphite or graphene product and edge covering method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112277327A true CN112277327A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010999961.3A Pending CN112277327A (en) | 2020-09-21 | 2020-09-21 | Graphite or graphene product and edge covering method thereof |
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| Country | Link |
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| CN (1) | CN112277327A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113829685A (en) * | 2021-09-13 | 2021-12-24 | 深圳市鸿富诚屏蔽材料有限公司 | Graphene heat-conducting gasket edge covering process and edge-covered graphene heat-conducting gasket |
| CN115431344A (en) * | 2022-08-08 | 2022-12-06 | 深圳垒石热管理技术股份有限公司 | Die cutting process for side-edge-wrapped graphite |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204249585U (en) * | 2014-11-18 | 2015-04-08 | 曹平 | A kind of book cover |
| CN109713171A (en) * | 2017-10-25 | 2019-05-03 | 深圳科博源科技有限公司 | High capacity small coin cell lithium batteries inner casing and the fixed processing method of insulating film |
| CN210469764U (en) * | 2019-08-30 | 2020-05-05 | 深圳日高胶带新材料有限公司 | Repeatedly-pasted adhesive tape with built-in graphene electric heating layer |
-
2020
- 2020-09-21 CN CN202010999961.3A patent/CN112277327A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204249585U (en) * | 2014-11-18 | 2015-04-08 | 曹平 | A kind of book cover |
| CN109713171A (en) * | 2017-10-25 | 2019-05-03 | 深圳科博源科技有限公司 | High capacity small coin cell lithium batteries inner casing and the fixed processing method of insulating film |
| CN210469764U (en) * | 2019-08-30 | 2020-05-05 | 深圳日高胶带新材料有限公司 | Repeatedly-pasted adhesive tape with built-in graphene electric heating layer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113829685A (en) * | 2021-09-13 | 2021-12-24 | 深圳市鸿富诚屏蔽材料有限公司 | Graphene heat-conducting gasket edge covering process and edge-covered graphene heat-conducting gasket |
| CN113829685B (en) * | 2021-09-13 | 2023-12-22 | 深圳市鸿富诚新材料股份有限公司 | Graphene heat conduction gasket edge covering process and edge covering graphene heat conduction gasket |
| CN115431344A (en) * | 2022-08-08 | 2022-12-06 | 深圳垒石热管理技术股份有限公司 | Die cutting process for side-edge-wrapped graphite |
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Application publication date: 20210129 |