CN113498308A - Metal shielding sheet processing method - Google Patents
Metal shielding sheet processing method Download PDFInfo
- Publication number
- CN113498308A CN113498308A CN202010198669.1A CN202010198669A CN113498308A CN 113498308 A CN113498308 A CN 113498308A CN 202010198669 A CN202010198669 A CN 202010198669A CN 113498308 A CN113498308 A CN 113498308A
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- Prior art keywords
- metal
- protective layer
- sheet
- layer
- core
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- 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
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a method for processing a metal shielding sheet, which comprises the following steps: cutting the metal sheet into uniform sizes, polishing the edge of the metal sheet, and blunting the corners of the metal sheet; dividing the processed metal sheets into two groups, wherein one group of metal sheets is punched with a slot at the edge to obtain an upper protective layer, and the other group of metal sheets is punched with a strip-shaped sheet at the edge and the strip-shaped sheet is bent upwards to obtain a lower protective layer; the invention relates to a method for processing a metal shielding sheet, which comprises the steps of spraying a non-metal coating on the adjacent sides of an upper protective layer and a lower protective layer, aligning the lower protective layer and the upper protective layer on a station, wherein the metal shielding sheet is composed of a shielding layer and protective layers on two sides of the shielding layer, so that the shielding layer can be packaged between the upper protective layer and the lower protective layer, connecting the shielding layer with an exposed connector lug, and when a high-frequency magnetic line of force passes through the metal shielding sheet, a magnetic field generated by the current of a metal core and an interference magnetic field are mutually offset, thereby reducing the interference generated by the interference magnetic field.
Description
Technical Field
The invention discloses a metal shielding sheet processing method, and belongs to the technical field of chip protection.
Background
A chipset is a group of integrated circuit "chips" that work together and are sold as a product. It is responsible for connecting the core of computer, microprocessor, with other parts of the machine, and is an important component for determining the level of the mainboard.
The method for preventing the interference source of the element part, the circuit, the assembly part, the cable or the whole system from diffusing outwards is called as shielding protection, the circuit, the equipment or the system can be surrounded to prevent the interference source from being influenced by an external electromagnetic field, the material of the shielding cover usually adopts stainless steel and copper albedo with the thickness of 0.2mm as materials, wherein the copper albedo is a metal shielding material easy to be tinned, the flatness of the metal shielding body is strictly controlled within the tolerance range of 0.05mm to ensure the performance and the excellent shielding effect of the easy tinning, and the metal shielding sheet is an effective protective body of a chip set.
Disclosure of Invention
The invention aims to solve the technical problem of difficulty in treatment of odor generated by fermentation of compost and provides a method for processing a metal shielding sheet, so that the problem is solved.
In order to achieve the purpose, the invention provides the following technical scheme: a metal shielding sheet processing method comprises the following steps:
(1) cutting the metal sheet into uniform sizes, polishing the edge of the metal sheet, and blunting the corners of the metal sheet;
(2) the processed metal sheets are divided into two groups, wherein one group of metal sheets is provided with slots on the edge by punching to obtain an upper protective layer, and the other group of metal sheets is provided with strip-shaped sheets on the edge by punching and bending the strip-shaped sheets upwards to obtain a lower protective layer;
(3) spraying a non-metal coating on the adjacent sides of the upper protective layer and the lower protective layer, and aligning the lower protective layer and the upper protective layer on a station;
(4) placing the metal shielding layer between the upper protective layer and the lower protective layer, and bonding the upper protective layer, the metal shielding layer and the lower protective layer in sequence by using a heat-conducting adhesive;
(5) bending the strip-shaped sheet of the lower protective layer after penetrating through the slot, extruding the upper protective layer, the metal shielding layer and the lower protective layer into a plate-shaped structure by utilizing stamping equipment, and cooling and shaping;
(6) and stamping the whole plate-shaped structure into a bottom side die cavity structure by using stamping equipment to obtain the formed metal shielding sheet.
Preferably, the step (4) of preparing the metal shielding layer comprises the following steps:
(4.1) cutting a metal core with a proper length, and bending the metal core into a snake-shaped structure;
(4.2) placing the bent metal core on a stamping platform, and extruding the metal core to a preset thickness by stamping equipment;
and (4.3) welding wire connectors at two ends of the metal core to form a metal shielding layer.
Preferably, the thickness of the metal shielding layer is 3nm to 5 μm.
Preferably, the heat-conducting adhesive is semisolid viscous high-heat-conductivity silicone grease.
Preferably, the non-metal layer is a graphene plating layer.
Preferably, the metal core in the preparation step (4.1) is any one of a copper core, a silver core, a magnesium core or a superplastic alloy.
Compared with the prior art, the invention has the following beneficial effects: the metal shielding sheet is composed of a shielding layer and protective layers on two sides of the shielding layer, so that the shielding layer can be packaged between an upper protective layer and a lower protective layer and is connected with electricity through an exposed connector lug, when a high-frequency magnetic line of force passes through the metal shielding sheet, a magnetic field generated by current of a metal core and an interference magnetic field are mutually offset, and therefore interference generated by the interference magnetic field can be reduced, the upper protective layer and the lower protective layer are connected and pressed through a hot melt adhesive and a buckle structure, and therefore the overall strength of the metal shielding sheet is greatly increased.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A metal shielding sheet processing method comprises the following steps:
(1) cutting the metal sheet into uniform sizes, polishing the edge of the metal sheet, and blunting the corners of the metal sheet;
(2) the processed metal sheets are divided into two groups, wherein one group of metal sheets is provided with slots on the edge by punching to obtain an upper protective layer, and the other group of metal sheets is provided with strip-shaped sheets on the edge by punching and bending the strip-shaped sheets upwards to obtain a lower protective layer;
(3) spraying a non-metal coating on the adjacent sides of the upper protective layer and the lower protective layer, and aligning the lower protective layer and the upper protective layer on a station;
(4) placing the metal shielding layer between the upper protective layer and the lower protective layer, and bonding the upper protective layer, the metal shielding layer and the lower protective layer in sequence by using a heat-conducting adhesive;
(5) bending the strip-shaped sheet of the lower protective layer after penetrating through the slot, extruding the upper protective layer, the metal shielding layer and the lower protective layer into a plate-shaped structure by utilizing stamping equipment, and cooling and shaping;
(6) and stamping the whole plate-shaped structure into a bottom side die cavity structure by using stamping equipment to obtain the formed metal shielding sheet.
Wherein, the preparation steps of the metal shielding layer in the step (4) are as follows:
(4.1) cutting a metal core with a proper length, and bending the metal core into a snake-shaped structure;
(4.2) placing the bent metal core on a stamping platform, and extruding the metal core to a preset thickness by stamping equipment;
and (4.3) welding wire connectors at two ends of the metal core to form a metal shielding layer.
Wherein, the thickness of the metal shielding layer is 3 nm-5 μm, the integration is easy, and the volume is small.
The heat-conducting viscose is semisolid viscous high-heat-conductivity silicone grease which has good heat-conducting and high-temperature-resistant performances.
The non-metal layer is a graphene coating which has excellent thermal conductivity, high temperature resistance, friction resistance and corrosion resistance.
Wherein, the metal core in the preparation step (4.1) is any one of a copper core, a silver core, a magnesium core or a superplastic alloy, and the metal shielding layer is easy to manufacture.
Specifically, the double-layer protective layer plays a role in electrostatic shielding, the central interlayer of the double-layer protective layer is interfered in an electromagnetic shielding mode, electromagnetic field transmission penetrates through the metal shielding sheet in an exponential attenuation mode, and high-frequency electromagnetic waves can be prevented from entering the interior of a pressing model of the metal shielding sheet.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A metal shielding sheet processing method is characterized by comprising the following steps:
(1) cutting the metal sheet into uniform sizes, polishing the edge of the metal sheet, and blunting the corners of the metal sheet;
(2) the processed metal sheets are divided into two groups, wherein one group of metal sheets is provided with slots on the edge by punching to obtain an upper protective layer, and the other group of metal sheets is provided with strip-shaped sheets on the edge by punching and bending the strip-shaped sheets upwards to obtain a lower protective layer;
(3) spraying a non-metal coating on the adjacent sides of the upper protective layer and the lower protective layer, and aligning the lower protective layer and the upper protective layer on a station;
(4) placing the metal shielding layer between the upper protective layer and the lower protective layer, and bonding the upper protective layer, the metal shielding layer and the lower protective layer in sequence by using a heat-conducting adhesive;
(5) bending the strip-shaped sheet of the lower protective layer after penetrating through the slot, extruding the upper protective layer, the metal shielding layer and the lower protective layer into a plate-shaped structure by utilizing stamping equipment, and cooling and shaping;
(6) and stamping the whole plate-shaped structure into a bottom side die cavity structure by using stamping equipment to obtain the formed metal shielding sheet.
2. The method of claim 1, wherein: the preparation steps of the metal shielding layer in the step (4) are as follows:
(4.1) cutting a metal core with a proper length, and bending the metal core into a snake-shaped structure;
(4.2) placing the bent metal core on a stamping platform, and extruding the metal core to a preset thickness by stamping equipment;
and (4.3) welding wire connectors at two ends of the metal core to form a metal shielding layer.
3. The method of claim 1, wherein: the thickness of the metal shielding layer is 3 nm-5 mu m.
4. The method of claim 1, wherein: the heat-conducting viscose is semisolid viscous high-heat-conductivity silicone grease.
5. The method of claim 1, wherein: the non-metal layer is a graphene coating.
6. The metal shielding plate processing method according to claim 2, wherein: the metal core in the preparation step (4.1) is any one of a copper core, a silver core, a magnesium core or a superplastic alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198669.1A CN113498308A (en) | 2020-03-20 | 2020-03-20 | Metal shielding sheet processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198669.1A CN113498308A (en) | 2020-03-20 | 2020-03-20 | Metal shielding sheet processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113498308A true CN113498308A (en) | 2021-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010198669.1A Pending CN113498308A (en) | 2020-03-20 | 2020-03-20 | Metal shielding sheet processing method |
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| CN (1) | CN113498308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114340169A (en) * | 2021-12-30 | 2022-04-12 | 安捷利电子科技（苏州）有限公司 | Edge covering method of shielding film and application thereof |
-
2020
- 2020-03-20 CN CN202010198669.1A patent/CN113498308A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114340169A (en) * | 2021-12-30 | 2022-04-12 | 安捷利电子科技（苏州）有限公司 | Edge covering method of shielding film and application thereof |
| CN114340169B (en) * | 2021-12-30 | 2024-04-05 | 安捷利电子科技（苏州）有限公司 | Edge wrapping method of shielding film and application thereof |
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