Electromagnetic shielding aluminum foil assembly

Abstract

The utility model relates to an electromagnetic shielding aluminum foil assembly which comprises a base layer, a conducting layer and a cementing layer, and the conducting layer is located between the base layer and the cementing layer and is in cementing connection with the cementing layer. A shielding net is arranged in the base layer, a plurality of blind holes are evenly distributed around the shielding net, connecting positions are arranged on the conductive layer, the connecting positions are fixedly connected in the blind holes, the shielding net is arranged in the base layer, the overall thickness of the aluminum strip is reduced, meanwhile, the aluminum strip has the anti-static performance, meanwhile, the blind holes are formed in the base layer, and the anti-static performance is improved. The conductive layer is provided with the connecting part and is fixed in the blind hole through the connecting part, so that the stability of the conductive layer and the base layer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum foil components, in particular to an electromagnetic shielding aluminum foil component. Background Art

[0002] Aluminum foil is a hot stamping material that is directly rolled into thin sheets with metal aluminum. Its hot stamping effect is similar to that of pure silver foil, so it is also called fake silver foil. Because aluminum is soft, ductile, and has a silvery-white luster, if the rolled thin sheets are mounted on offset paper with sodium silicate and other materials to make aluminum foil sheets, usually conductive aluminum foil tape is used. Conductive aluminum foil tape is mainly used to eliminate electromagnetic interference, isolate electromagnetic waves from harming the human body, and prevent unnecessary voltage and current from affecting the operation of electronic components.

[0003] With the rapid development of electronic products, the replacement is getting faster and faster, and the performance requirements of electronic products are getting higher and higher. Therefore, shielding type, waterproof and fireproof type aluminum strips have appeared. Most of the existing aluminum strips are usually stacked with multiple functional layers. Each functional layer is fixed by gluing or laminating. This stacking method causes the thickness of the aluminum strip to increase exponentially, which is most obvious in shielding type aluminum strips. For example, in the publication number CN216998265U, a conductive aluminum foil tape with improved shielding performance is disclosed, characterized in that it includes: an aluminum foil layer; an electromagnetic isolation layer, the electromagnetic isolation layer is connected to the surface of the aluminum foil layer, and is used to shield the signal; a foam layer, the foam layer is connected to the side of the aluminum foil layer facing away from the electromagnetic isolation layer, and is used to support the aluminum foil layer, and the foam layer is provided with a plurality of connection holes penetrating the foam layer, and graphite is provided in the connection holes, and the graphite surface is flush with the surface of the foam layer; a base layer, the base layer is connected to the side of the foam layer facing away from the aluminum foil layer; an adhesive layer, the adhesive layer is connected to the side of the electromagnetic isolation layer facing away from the aluminum foil layer; and a release layer, the release layer is connected to the side of the adhesive layer facing away from the electromagnetic isolation layer. The utility model has the following advantages and effects: it can facilitate the aluminum foil tape to be completely attached to the surface of the electronic component, reduce the gap between the aluminum foil tape and the surface of the electronic component, and thus improve the overall shielding effect. By placing graphite in the foam layer, the electromagnetic isolation layer and the aluminum foil layer are connected into a two-layer structure, which invisibly increases the overall thickness. At the same time, the functional layers are connected by gluing. As time goes by, the adjacent functional layers are prone to delamination. Utility Model Content

[0004] The purpose of the utility model is to provide an electromagnetic shielding aluminum foil assembly to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an electromagnetic shielding aluminum foil assembly, which includes a base layer, a conductive layer and a bonding layer, the conductive layer is located between the base layer and the bonding layer and is bonded together; a shielding net is arranged in the base layer and a plurality of blind holes are evenly distributed around the shielding net, a connection point is arranged on the conductive layer, and the connection point is fixedly connected in the blind hole.

[0006] Compared with the prior art, the shielding net is arranged in the base layer to reduce the overall thickness of the aluminum tape, while making the aluminum tape have anti-static properties. At the same time, a blind hole is arranged on the base layer, and a connection is arranged on the conductive layer, which is fixed in the blind hole through the connection, thereby improving the stability of the conductive layer and the base layer.

[0007] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, crisscross installation grooves are arranged on the base layer, the shielding net is arranged in the installation grooves, and the gap between the installation grooves and the shielding net is filled with fillers, and the fillers are flush with the surface of the base layer.

[0008] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, a connecting platform is arranged on the base layer, the connecting platform is located between two adjacent installation grooves, and at least one blind hole is arranged on each connecting platform.

[0009] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, the diameter of the blind hole extends toward the guide layer and gradually decreases.

[0010] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, aluminum foil is arranged inside the conductive layer, and the connection point is arranged on the outer surface of the conductive layer.

[0011] Compared with the existing technology, the combination of the conductive layer and the aluminum foil can not only absorb and shield electromagnetic waves, but also improve the conductivity of the aluminum foil.

[0012] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, the conductive layer is made of nano conductive silver paste.

[0013] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, the shielding net is formed by weaving a plurality of graphene fibers vertically and horizontally.

[0014] As an improvement of the electromagnetic shielding aluminum foil assembly of the utility model, an insulating layer is further arranged between the base layer and the conductive layer, and the blind holes are evenly distributed on the insulating layer and penetrate the insulating layer.

[0015] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the advantages brought by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is a cross-sectional view of the conductive layer of the utility model.

[0018] Figure 3 It is a three-dimensional schematic diagram of the base layer of the utility model.

[0019] Figure 4 It is a front view of the utility model provided with an insulating layer.

[0020] Explanation of the accompanying numbers: 01. Base layer, 02. Installation groove, 03. Shielding mesh, 04. Filler, 05. Connection platform, 06. Blind hole, 07. Connection point, 08. Conductive layer, 09. Aluminum foil, 10. Glue layer, 11. Insulation layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] See also Figure 1-3 As shown, the utility model is about an electromagnetic shielding aluminum foil assembly, which includes a base layer 01, the base layer 01 is made of insulating material, the base layer 01 is provided with criss-cross mounting grooves 02, and the mounting grooves 02 are provided with a shielding net 03 made of a plurality of graphene fibers woven in a criss-cross pattern. Since the shielding net 03 is made of graphene fibers, the antistatic performance of the entire aluminum strip is improved. At the same time, the toughness and bendability of the base layer 01 are improved. The shielding net 03 is arranged in the base layer 01, and the thickness of the stacked two-layer separate structure is thinner than that in the prior art. The gap between the mounting groove 02 and the shielding net 03 is filled with a filler 04, and the filler 04 is made of epoxy resin, and the filler 04 is flush with the surface of the base layer 01. During assembly, the shielding net 03 is laid in the installation groove 02, and epoxy resin is scraped on the surface of the base layer 01. Since the epoxy resin is in a fluid state during the scraping process, it automatically flows into the gap between the installation groove 02 and the shielding net 03 during the scraping process. When the epoxy resin solidifies, the above-mentioned filler 04 is formed, thereby fixing the shielding net 03 in the installation groove 02 so that the shielding net 03 and the base layer 01 form a whole.

[0023] See also Figure 2-3As shown, a connection platform 05 is provided on the base layer 01, and the connection platform 05 is located between two adjacent mounting grooves 02. At least one blind hole 06 is provided on each connection platform 05, so that the blind holes 06 are evenly distributed around the shielding net. The diameter of the blind hole 06 extends in the direction of the guide layer 08 and gradually decreases. The blind hole 06 is processed by plasma etching hole forming technology. When the conductive layer 08 is sprayed on the base layer 01, the conductive layer 08 can form a connection point 07 in the blind hole 06. Therefore, the stability of the conductive layer 08 and the base layer 01 is improved. Since the conductive layer 08 is made of nano conductive silver paste. Therefore, when the process of dispensing and spraying is used to coat the base layer 01, a part of the nano conductive silver paste flows into the blind hole 06 and solidifies to form a conical connection point 07, thereby improving the stability of the conductive layer 08 and the base layer 01. The setting of the connection point 07 and the blind hole 06 prevents the occurrence of the phenomenon of separation. Since the filler is flush with the surface of the base layer and is made of epoxy resin, the epoxy resin has insulating properties, which in turn prevents the conductive layer and the shielding mesh from cross-current flow.

[0024] Aluminum foil 09 is arranged inside the conductive layer 08, and a complete conductive layer 08 is formed on the surface of the aluminum foil 09 by a metallization coating method to achieve the purpose of absorbing and shielding electromagnetic waves. The combination of the conductive layer 08 and the aluminum foil 09 can not only absorb and shield electromagnetic waves, but also improve the conductivity of the aluminum foil 09.

[0025] An adhesive layer 10 is disposed on the top of the conductive layer 08 , and the adhesive layer 10 is bonded and connected to the conductive layer 08 via an epoxy resin layer.

[0026] See also Figure 4 As shown, in order to further improve the shielding performance between the conductive layer and the shielding net, an insulating layer 1 is provided between the base layer and the conductive layer, and the insulating layer 11 and the base layer 01 are glued with epoxy resin. The above-mentioned blind holes 06 are evenly distributed on the insulating layer and penetrate the insulating layer 11, and the diameter of the blind holes 06 extends in the direction of the guide layer 08 and gradually decreases. When the conductive layer 08 is sprayed on the insulating layer 11, the conductive layer 08 can form a connection point 07 in the blind hole 06. Therefore, the stability of the conductive layer 08 and the insulating layer 11 is improved. Because the conductive layer 08 is made of nano-conductive silver paste. It is difficult to fix the nano-conductive silver paste with the insulating layer 11, but the nano-conductive silver paste can solidify to form a fixation. When it is applied on the insulating layer 11 by the glue spraying process, a part of the nano-conductive silver paste flows into the blind hole 06 and solidifies to form a conical connection point 07, thereby improving the stability of the conductive layer 08 and the insulating layer 11. Avoid the phenomenon of delamination between the insulating layer and the conductive layer.

[0027] The utility model has a shielding net 03 formed by a plurality of graphene fibers woven vertically and horizontally arranged in the base layer 01. While reducing the overall thickness of the aluminum strip, the overall anti-static performance of the aluminum strip is improved. A blind hole 06 is arranged on the base layer 01, and a connection 07 is arranged on the conductive layer 08. The conductive layer 08 is fixed in the blind hole 06 through the connection 07, thereby improving the stability of the conductive layer 08 and the base layer 01. At the same time, an aluminum foil 09 is arranged in the conductive layer 08. The combination of the conductive layer 08 and the aluminum foil 09 can not only absorb and shield electromagnetic waves, but also improve the conductivity of the aluminum foil 09.

[0028] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0030] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An electromagnetic shielding aluminum foil assembly, comprising a base layer, a conductive layer and a bonding layer, wherein the conductive layer is located between the base layer and the bonding layer and is bonded together, characterized in that: A shielding net is arranged in the base layer and a plurality of blind holes are evenly distributed around the shielding net. A connecting part is arranged on the conductive layer and the connecting part is fixedly connected in the blind hole.

2. The electromagnetic shielding aluminum foil assembly according to claim 1, characterized in that: The base layer is provided with crisscross installation grooves, the shielding net is arranged in the installation grooves, and the gap between the installation grooves and the shielding net is filled with fillers, which are flush with the surface of the base layer.

3. The electromagnetic shielding aluminum foil assembly according to claim 2, characterized in that: A connecting platform is arranged on the base layer, the connecting platform is located between two adjacent mounting grooves, and each connecting platform is arranged with at least one blind hole.

4. The electromagnetic shielding aluminum foil assembly according to claim 3, characterized in that: The diameter of the blind hole extends toward the guide layer and gradually decreases.

5. The electromagnetic shielding aluminum foil assembly according to claim 4, characterized in that: Aluminum foil is arranged inside the conductive layer, and the connection point is arranged on the outer surface of the conductive layer.

6. The electromagnetic shielding aluminum foil assembly according to claim 5, characterized in that: The conductive layer is made of nano-conductive silver paste.

7. The electromagnetic shielding aluminum foil assembly according to claim 1, characterized in that: The shielding net is made of a number of graphene fibers woven vertically and horizontally.

8. The electromagnetic shielding aluminum foil assembly according to any one of claims 1 to 6, characterized in that: An insulating layer is also arranged between the base layer and the conductive layer, and the blind holes are evenly distributed on the insulating layer and penetrate the insulating layer.

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