CN115635697A - Manufacturing method of flexible high-speed connector shielding material - Google Patents
Manufacturing method of flexible high-speed connector shielding material Download PDFInfo
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- CN115635697A CN115635697A CN202211288125.XA CN202211288125A CN115635697A CN 115635697 A CN115635697 A CN 115635697A CN 202211288125 A CN202211288125 A CN 202211288125A CN 115635697 A CN115635697 A CN 115635697A
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Abstract
The invention discloses a manufacturing method of a flexible high-speed connector shielding material, which comprises the following operation steps: the prepared metal powder with excellent high conductivity is put into a siloxane oligomerization device for siloxane oligomerization treatment, the metal powder is coated, the coated metal powder is uniformly mixed and mixed with liquid silica gel or rubber, the mixture of the materials is subjected to compression molding to produce sheets or is directly molded to obtain a porous shielding material finished product, and the obtained product is subjected to further precision punching molding to obtain a porous precision shielding product. The manufacturing method of the shielding material of the flexible high-speed connector has the advantages that the product has excellent creep resistance and compressibility, in addition, the microstructure of the product can be closely attached and installed in the gaps among the terminals, the signal interference caused by the insertion of each terminal and the signal pins can be shielded, the material has excellent heat dissipation performance, and the heat caused by the shielding signals can be dissipated.
Description
Technical Field
The invention relates to the field of shielding materials, in particular to a manufacturing method of a shielding material of a flexible high-speed connector.
Background
The shielding material is a material that prevents signal interference, and more generally use metal shielding cover to carry out the shielding of line signal, and the metal shielding cover is shielded and is installed in the connector department of concatenating to the whole parcel formula installation is kept apart the shielding with the joint position, and along with the continuous development of science and technology, people also are higher and higher to shielding material's manufacturing process requirement.
The existing shielding material has certain disadvantages when in use, although the signal interference can be prevented from being transmitted outwards, the signal leakage still exists at the insertion position of each terminal signal pin of the connector, the shielding grounding mode is still in metal spring sheet type buckle type contact, a perfect sealing shielding scheme cannot be obtained, the leakage of the single signal transmission in the shielding cover at the connector position can interfere other transmission lines, and the transmission precision and loss are influenced; in addition, the shielding effectiveness is reduced or even loses efficacy due to oxidation, rusting, deformation and the like of metal in the long-term use process, certain adverse effects are brought to the use process of people, and therefore, a manufacturing method of the shielding material of the flexible high-speed connector is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a manufacturing method of a flexible high-speed connector shielding material, which has excellent creep resistance and compressibility, can be closely attached and installed in gaps among terminals on a microstructure of the product, can shield signal interference caused by the insertion of each terminal and a signal pin, has excellent heat dissipation performance, can dissipate heat caused by shielding signals, and can effectively solve the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention adopts the technical scheme that: a method for manufacturing a shielding material of a flexible high-speed connector comprises the following operation steps:
s1: preparing devices and materials which are required to be used for preparing a flexible high-speed connector shielding material, wherein the materials comprise metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material, and the devices comprise a siloxane oligomerization device, a compression molding device and a punching molding device;
s2: putting the prepared metal powder with excellent high conductivity into a siloxane oligomerization device for siloxane oligomerization and coating;
s3: uniformly mixing and milling the metal powder coated in the step S2 and liquid silica gel or rubber, and simultaneously adding a graphene material, a reverse magnetic material and a composite resin material for high-speed centrifugal mixing;
s4: introducing the material mixed product obtained in the step S3 into a compression molding device for compression molding to produce sheets or directly compressing and molding to obtain a porous shielding material finished product;
s5: and (5) placing the product obtained in the step (S4) into a punching forming device for further precise punching forming to obtain a porous precise shielding product.
As a preferred technical scheme of the present application, the step S4 adopts a compression molding process, and specifically includes the following operation steps:
a: manufacturing a compression mold, wherein the compression mold can be replaced by a specified shape to manufacture products with different shapes;
b: mixing metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material to prepare a blank;
c: placing the blank in a heated mold cavity, closing the mold and pressurizing;
d: and demolding to obtain a porous shielding finished product.
As a preferable technical scheme, the method comprises a compression molding process, and specifically comprises the following operation steps:
a: mixing metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material to prepare a blank;
b: placing the blank in a plane mould cavity with a certain thickness, closing the mould and pressurizing;
c: demoulding to obtain a planar sheet with a certain thickness;
d: the sheet is punched into a finished shielding product with a porous structure by using a die cutting process.
The method is characterized by comprising an injection molding process, and the specific operation steps comprise die opening, injection molding and demolding to obtain a porous shielding finished product.
As a preferable technical scheme, the metal powder is conductive powder, is spherical, flaky and irregular, and can be one or a mixture of high-conductivity metal powder and high-conductivity metal powder in Ag, ag/Cu, ag/Al and Ag/Glass.
As a preferred technical solution of the present application, the thickness of the shielding product formed in the step S5 is set according to the height of the gap after the terminal and the signal pin are inserted, wherein the thickness is preferably 0.3-1.0 mm.
As a preferred technical solution of the present application, the hole-shaped structure of the shielding product formed in step S5 is designed according to the external shape of the connector terminal to be shielded, and is tightly attached to the outer wall of the terminal, and at the same time, the dropping property of the metal powder is required to be the lowest, and the design precision of the product is also required to be extremely high, and the maximum tolerance is not more than 0.1mm.
As a preferred technical solution of the present application, in the step S3, the graphene material, the reverse magnetic material, and the composite resin material are mixed in a ratio of 4.
(III) advantageous effects
Compared with the prior art, the invention provides a manufacturing method of a flexible high-speed connector shielding material, which has the following beneficial effects: the manufacturing method of the flexible high-speed connector shielding material is suitable for connectors, particularly high-speed and high-density connectors, the XY direction and the Z direction have lower resistance values, the product has excellent creep resistance and compressibility, in addition, the microstructure of the product can be closely attached and installed in gaps among terminals, signal interference caused by insertion of each terminal and a signal pin can be shielded, the heat dissipation performance of the material is excellent, heat caused by shielding signals can be dissipated, a traditional external metal shielding cover is changed into shielding at a terminal insertion position where the signals are most easily leaked, signal series flow among circuits can be effectively prevented, EMI noise influence caused by signal impact caused by the gaps is avoided, the whole shielding material is simple in structure and convenient to operate, and the using effect is better compared with that of a traditional mode.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a method for manufacturing a shielding material of a flexible high-speed connector according to the present invention.
In the figure: 100. a through-type via; 200. a connector shielding material.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are a part of the embodiments of the present invention, rather than all of the embodiments, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. 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. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
A method for manufacturing a shielding material of a flexible high-speed connector comprises the following operation steps:
s1: preparing devices and materials which are required to be used for preparing a flexible high-speed connector shielding material, wherein the materials comprise metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material, and the devices comprise a siloxane oligomerization device, a compression molding device and a punching molding device;
s2: putting the prepared metal powder with excellent high conductivity into a siloxane oligomerization device for siloxane oligomerization and coating;
s3: uniformly mixing and milling the metal powder coated in the step S2 and liquid silica gel or rubber, and simultaneously adding a graphene material, a reverse magnetic material and a composite resin material for high-speed centrifugal mixing;
s4: introducing the material mixed mixture obtained in the step S3 into a compression molding device for compression molding to produce sheets or directly compressing the materials into a porous shielding material finished product;
s5: and (5) placing the product obtained in the step (S4) into a punching forming device for further precise punching forming to obtain a porous precise shielding product.
Further, a compression molding process is adopted in the step S4, and the method specifically comprises the following operation steps:
a: manufacturing a compression mold, wherein the compression mold can be replaced by a specified shape to manufacture products with different shapes;
b: mixing metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material to prepare a blank;
c: placing the blank in a heated mold cavity, closing the mold and pressurizing;
d: and demolding to obtain a porous shielding finished product.
Further, the method comprises a compression molding process, and specifically comprises the following operation steps:
a: preparing a material blank from a mixed material of metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material;
b: placing the blank in a plane mould cavity with a certain thickness, closing the mould and pressurizing;
c: demoulding to obtain a planar sheet with a certain thickness;
d: the sheet is punched into a finished shielding product with a porous structure by using a die cutting process.
Further, the method comprises an injection molding process, and the specific operation steps comprise mold opening, injection molding and demolding to obtain the porous shielding finished product.
Furthermore, the metal powder is conductive powder, and is in a sphere shape, a sheet shape or an irregular shape, and the metal powder can be one or a mixture of high-conductivity metal powder and high-conductivity metal powder in Ag, ag/Cu, ag/Al and Ag/Glass.
Further, the thickness of the shielding product formed in the step S5 is set according to the height of the gap after the terminal and the signal pin are inserted, wherein the thickness is preferably 0.3-1.0 mm.
Furthermore, the hole-shaped structure of the shielding product formed in the step S5 is designed according to the external shape of the terminal of the connector to be shielded, and is tightly attached to the outer wall of the terminal, and meanwhile, the shedding performance of the metal powder is required to be the lowest, and meanwhile, the design precision of the product is also required to be extremely high, and the maximum tolerance is not more than 0.1mm.
Further, in the step S3, the graphene material, the inverse magnetic material and the composite resin material are proportioned, and the proportion of the graphene material, the inverse magnetic material and the composite resin material is 4.
The specific embodiment is as follows:
a method for manufacturing a shielding material of a flexible high-speed connector is shown in figure 1, and Ag/Al conductive spherical powder is mixed powder with the powder diameter D90 of 30um/10um/5um, and the proportion can be 6:3:1;
the processing technology comprises the following steps:
and (3) carrying out siloxane treatment on the metal powder:
(1) Preparing 0.1-10% aqueous solution of siloxane, wherein one or mixture of organic siloxane compound and fluorinated organic siloxane can be used;
(2) Cleaning the metal powder, removing oil stains or oxides on the surface, and then drying by air shower;
(3) The siloxane treating agent is uniformly coated on the surface of the product by extrusion, shearing, impact, friction and other modes, so that various components are mutually infiltrated and diffused to form coating, the coating can be prepared by a ball stone grinding method, a stirring grinding method, a high-speed airflow impact method and the like, and drying is carried out after contact.
(4) Adding liquid silica gel into the dried metal powder in batches for mixing, wherein the hardness of the silica gel is 20A-40A;
(5) Placing the mixed silica gel in a flat plate mould press, setting the pressure of a flat plate to be 17-22MPa, carrying out high-temperature vulcanization, and carrying out mould pressing to obtain a shielding sheet material with the thickness of 0.3-1.0 mm;
(6) Processing the shielding sheet material into a connector shielding material 200 with a plurality of through type through holes 100 by die cutting or laser cutting;
(7) The through-hole-shaped member of the shielding material is inserted between the connector terminals for mounting.
Because the silica gel has certain compressibility, when the contact pin is contacted with the terminal, the shielding material is compressed to a certain degree, usually 10-30%; therefore, the shielding material is tightly filled in the gap, and can effectively shield the electromagnetic interference generated by each line.
It is noted that, herein, relational terms such as first and second (first, second, and the like) and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. A manufacturing method of a flexible high-speed connector shielding material is characterized by comprising the following steps: the method comprises the following operation steps:
s1: preparing devices and materials which are required to be used for preparing a flexible high-speed connector shielding material, wherein the materials comprise metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material, and the devices comprise a siloxane oligomerization device, a compression molding device and a punching molding device;
s2: putting the prepared metal powder with excellent high conductivity into a siloxane oligomerization device for siloxane oligomerization and coating;
s3: uniformly mixing and milling the metal powder coated in the step S2 and liquid silica gel or rubber, and simultaneously adding a graphene material, a reverse magnetic material and a composite resin material for high-speed centrifugal mixing;
s4: introducing the material mixed mixture obtained in the step S3 into a compression molding device for compression molding to produce sheets or directly compressing the materials into a porous shielding material finished product;
s5: and (5) placing the product obtained in the step (S4) into a punching forming device for further precise punching forming to obtain a porous precise shielding product.
2. The method of claim 1, wherein the shielding material comprises at least one of the following materials: the step S4 adopts a compression molding process, and specifically comprises the following operation steps:
a: manufacturing a compression mold, wherein the compression mold can be replaced by a specified shape to manufacture products with different shapes;
b: preparing a material blank from a mixed material of metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material;
c: placing the blank in a heated mold cavity, closing the mold and pressurizing;
d: and demolding to obtain a porous shielding finished product.
3. A method of making a flexible high speed connector shielding material according to claim 2, wherein: the method comprises a compression molding process, and specifically comprises the following operation steps:
a: preparing a material blank from a mixed material of metal powder, liquid silica gel, a graphene material, a reverse magnetic material and a composite resin material;
b: placing the blank in a plane mould cavity with a certain thickness, closing the mould and pressurizing;
c: demoulding to obtain a planar sheet with a certain thickness;
d: and stamping the sheet into a shielding finished product with a porous structure by using a die cutting process.
4. A method of making a flexible high speed connector shielding material according to claim 2, wherein: the method comprises an injection molding process, and the specific operation steps comprise mold opening, injection molding and demolding to obtain a porous shielding finished product.
5. The method of claim 1, wherein the shielding material comprises at least one of the following materials: the metal powder is conductive powder, is spherical, flaky and irregular, and can be one or a mixture of high-conductivity metal powder and high-conductivity metal powder in Ag, ag/Cu, ag/Al and Ag/Glass.
6. The method of claim 1, wherein the shielding material comprises at least one of the following materials: and the thickness of the shielding product formed in the step S5 is set according to the height of the gap after the terminal and the signal pin are inserted, wherein the thickness is 0.3-1.0mm as the optimum.
7. The method of claim 1, wherein the shielding material comprises at least one of the following materials: and (5) designing the hole-shaped structure of the shielding product formed in the step (S5) according to the appearance of the connector terminal to be shielded, tightly attaching the hole-shaped structure to the outer wall of the terminal, and simultaneously requiring that the shedding performance of metal powder is possibly the lowest, and the design precision of the product is also extremely high, and the maximum tolerance is not more than 0.1mm.
8. The method of claim 1, wherein the shielding material comprises at least one of the following materials: in the step S3, the graphene material, the reverse magnetic material and the composite resin material are proportioned, wherein the ratio of the graphene material to the reverse magnetic material to the composite resin material is (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211288125.XA CN115635697A (en) | 2022-10-20 | 2022-10-20 | Manufacturing method of flexible high-speed connector shielding material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211288125.XA CN115635697A (en) | 2022-10-20 | 2022-10-20 | Manufacturing method of flexible high-speed connector shielding material |
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| CN115635697A true CN115635697A (en) | 2023-01-24 |
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| CN202211288125.XA Pending CN115635697A (en) | 2022-10-20 | 2022-10-20 | Manufacturing method of flexible high-speed connector shielding material |
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