CN112140595A - Forming process of carbon fiber-containing oriented ordered heat-conducting gasket - Google Patents
Forming process of carbon fiber-containing oriented ordered heat-conducting gasket Download PDFInfo
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- CN112140595A CN112140595A CN202010997295.XA CN202010997295A CN112140595A CN 112140595 A CN112140595 A CN 112140595A CN 202010997295 A CN202010997295 A CN 202010997295A CN 112140595 A CN112140595 A CN 112140595A
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- carbon fiber
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- conducting gasket
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- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
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- 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
Abstract
The application relates to a carbon-containing fiber directional sequencing heat-conducting gasket molding process, which comprises the following steps: s1: providing a plurality of winding frames and carbon fiber filaments; s2: winding the carbon fiber wire on the outer surface of the winding frame; s3: stacking and accumulating a plurality of winding frames which finish winding the carbon fiber yarns from bottom to top to form a pretreatment frame; s4: placing the pretreatment frame in a container, filling liquid glue, vacuumizing the container, and heating and curing the glue to form a prefabricated product; s5: cutting the carbon fiber wire along the inner wall of the through hole to separate the prefabricated product from the winding frame; s6: cutting the preform into a plurality of semi-finished products; s7: and sequentially polishing two end surfaces of the semi-finished product obtained in the step S6 to obtain a finished heat-conducting gasket with a smooth surface. The orientation of the carbon fibers is sequenced, so that two ends of the carbon fiber wires can be respectively contacted with the radiator and the electronic element, and meanwhile, the distance required by heat conduction of the carbon fiber wires is shortened, and the heat dissipation effect of the heat conduction gasket is improved.
Description
Technical Field
The application relates to the technical field of heat-conducting gaskets, in particular to a carbon fiber oriented sorting heat-conducting gasket forming process.
Background
With the rapid development of networks, various electronic products are developed towards miniaturization, refinement and high power, and the integration density of transistors is greatly increased. The great increase of electronic integration means that more heat is generated by electronic components packaged in the circuit board, and if heat is not conducted out in time, the heat in electronic products can be rapidly accumulated, so that the working temperature of the electronic components is increased, and the normal work of equipment is influenced.
At present, heat conduction gaskets are generally used for rapidly transmitting heat to a radiator, heat conduction of the heat conduction gaskets is generally improved in a mode of not needing high filling, and in order to improve the heat conductivity of the heat conduction gaskets, the carbon fibers are generally directionally sequenced in a mode of electric field orientation, magnetic field orientation or extrusion orientation.
In view of the above-mentioned related art, the inventors believe that the degree of orientation of the carbon fibers of the thermal conductive gasket produced in the current manner is low, and thus a defect that the carbon fibers are filled and the thermal conductivity cannot rise is still formed.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
In order to improve the heat conductivity of the heat conduction gasket, the application provides a molding process of the carbon fiber oriented ordered heat conduction gasket.
The application provides a carbon-containing fiber directional sequencing heat conduction gasket forming process, which adopts the following technical scheme:
a forming process of a carbon fiber-containing oriented ordered heat conducting gasket comprises the following steps:
s1: providing a plurality of winding frames and carbon fiber wires, wherein through grooves penetrate through the end faces of the winding frames;
s2: winding the carbon fiber wires on the outer surface of the winding frame, keeping the carbon fiber wires positioned on the same side of the winding frame parallel to each other, and keeping a gap between the adjacent carbon fiber wires positioned on the same side of the winding frame;
s3: stacking and accumulating a plurality of winding frames which finish winding the carbon fiber yarns from bottom to top to form a pretreatment frame, wherein the winding directions of the carbon fiber yarns of adjacent winding frames are the same;
s4: placing the pretreatment frame in a container, filling liquid glue into the container to enable the liquid glue to completely immerse the pretreatment frame, vacuumizing the container to remove air bubbles in the glue, and then heating and curing the glue to enable the carbon fiber filaments and the glue to be fixed and form a prefabricated product in the through hole;
s5: cutting the carbon fiber wire along the inner wall of the through hole, and then moving the winding frame and the prefabricated product towards two directions away from each other, thereby realizing the separation of the prefabricated product and the winding frame;
s6: cutting the preform into a plurality of semi-finished products according to the required thickness along the direction vertical to the carbon fiber filaments;
s7: and sequentially polishing two end surfaces of the semi-finished product obtained in the step S6 to obtain a finished heat-conducting gasket with a smooth surface.
Through adopting above-mentioned technical scheme, arrange in order the orientation of carbon fiber, make the both ends of carbon fiber silk can contact with radiator and electronic component respectively to promote heat-radiating effect of heat-conducting gasket.
Optionally: in S1, the thickness of the bobbin frame is 0.15 mm.
Through adopting above-mentioned technical scheme, make the interval of the carbon fiber silk between the adjacent wire winding frame can equal to the interval between the adjacent carbon fiber silk that is located same wire winding frame one side to make the distribution of carbon fiber silk in the thermal pad more even, thereby make the heat conduction efficiency of thermal pad more high-efficient.
Optionally: in S2, the distance between adjacent carbon fiber filaments on the same side of the bobbin is less than 0.2 mm.
Through adopting above-mentioned technical scheme, reduce the interval between the adjacent carbon fiber silk to increase the content of carbon fiber silk in the heat conduction gasket, increase the heat conductivity of heat conduction gasket.
Optionally: in S3, when the bobbins are stacked, the barrier ribs are provided between adjacent bobbins to equalize the distance between adjacent bobbins to the distance between adjacent carbon fiber filaments on the side wall of the same bobbin frame.
By adopting the technical scheme, the spacing between the adjacent winding frames is adjusted by using the barrier strips, so that the spacing between the carbon fiber wires between the adjacent winding frames can be adjusted, and the heat-conducting gaskets with different carbon fiber wire distribution densities can be produced.
Optionally: in S3, the height of the bobbin stack is 125 mm to 150 mm.
By adopting the technical scheme, the volume of the produced semi-finished product is not too large, so that the subsequent cutting process is more convenient.
Optionally: in S4, the container is controlled to vibrate before the container is vacuumized, so that the glue is filled in the gaps between the adjacent carbon fiber filaments.
Through adopting above-mentioned technical scheme, make glue change with the comprehensive contact of carbon fiber silk, the difficult condition that glue does not cover the carbon fiber silk that appears increases the yields of heat conduction gasket production.
Optionally: in the S4, the vacuumizing time is more than 20 minutes, and the vacuum degree is-0.09 MPa.
Through adopting above-mentioned technical scheme, further reduce the probability that the bubble is retained in the glue.
Optionally: and S7, adsorbing the bottom surface of the semi-finished product by using a sucking disc during polishing, polishing the upper end of the semi-finished product by using a soft wool roller, turning the semi-finished product by 180 degrees after polishing one surface, adsorbing the polished end surface by using the sucking disc, and polishing the non-polished end surface by using the soft wool roller, wherein the rotating speed of the soft wool roller is 3000 r/min.
Through adopting above-mentioned technical scheme, utilize soft wool roller to polish, utilize the sucking disc to fix a position semi-manufactured goods, make semi-manufactured goods's course of working more convenient.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the direction of the carbon fiber wires is sequenced, then the carbon fiber wires after sequencing are mixed with glue to form the heat-conducting gasket, and the directions of the carbon fiber wires of the processed heat-conducting gasket are more consistent, so that the heat conductivity of the heat-conducting gasket is improved;
2. the process of mixing the glue and the carbon fiber yarns is firstly vibrated and then vacuumized, so that bubbles in the glue are removed under the condition that the glue and the carbon fiber yarns are uniformly mixed, and the quality of the produced heat-conducting gasket is improved.
Drawings
FIG. 1 is a process flow diagram of an embodiment of a molding process of the present application;
FIG. 2 is a schematic diagram of a winding frame and a carbon fiber winding structure according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of an embodiment of a forming process of the present application for illustrating a structure of a bobbin wound with carbon fiber filaments stacked and formed into a pre-processing frame;
FIG. 4 is a schematic structural diagram of a molding process of the present application for illustrating a process of pouring liquid glue and solidifying;
FIG. 5 is a schematic diagram of a preform separated from a bobbin according to an embodiment of the present invention;
FIG. 6 is a schematic view of an embodiment of a molding process of the present application showing a preform structure;
FIG. 7 is a schematic view of an embodiment of a molding process of the present application for illustrating a semi-finished structure;
in the figure, 1, carbon fiber filaments; 2. a winding frame; 3. blocking strips; 4. a colloid; 5. A preprocessing frame; 6. preparing a product; 7. and (5) semi-finished product.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
In the application, 1000 millipascal of vinyl silicone oil is CX-352 (1000) of Guangzhou silicon new material technology company, 10000 millipascal of vinyl silicone oil is CX-352 (10000) of Guangzhou silicon new material technology company, the PH of the sub-Jun chemical industry (Zhongshan) company is selected as the delay agent, AM-8071 of the Guangzhou Xin silicon new material technology company is selected as the MQ resin, and PT2000 of the sub-Jun chemical industry (Zhongshan) company is selected as the platinum catalyst.
The application discloses carbon fiber containing directional sequencing heat conduction gasket forming process makes carbon fiber 1 of the gasket of production all towards same direction, increases the heat conductivity of the gasket of production.
As shown in fig. 1, the method comprises the following steps:
s1: providing a plurality of winding frames 2 and carbon fiber wires 1, wherein the winding frames 2 are rectangular stainless steel sheets with the thickness of 0.15 mm, through holes penetrate through the surfaces of the winding frames, and silica gel sheets are bonded on the side walls, in contact with the carbon fiber wires 1, of the winding frames 2;
s2: winding a carbon fiber wire 1 on the outer wall surface of a winding frame 2, keeping the carbon fiber wires 1 positioned on the same side of the winding frame 2 parallel to each other, keeping the distances between the adjacent carbon fiber wires 1 positioned on the same side of the winding frame 2 equal, wherein the distances are less than 0.2 mm, the carbon fiber wires 1 are abutted with a silica gel sheet connected with the winding frame 2, and two ends of the carbon fiber wires are tied to the winding frame;
s3: the winding frames 2 wound with the carbon fiber yarns 1 are stacked from bottom to top to form a pretreatment frame 5, the winding frames 2 of the same pretreatment frame 5 are fixed at four corners by bolts, the winding directions of the carbon fiber yarns 1 wound by the sequentially stacked winding frames 2 are the same, and the stacking height of the winding frames 2 is 125 mm to 150 mm. Barrier strips 3 for adjusting the distance between the adjacent winding frames 2 are arranged between the adjacent winding frames 2, the barrier strips 3 are not in contact with the carbon fiber wires 1, and the distance between the adjacent winding frames 2 is equal to the distance between the adjacent carbon fiber wires 1 on the same side of the winding frames 2;
s4: the method comprises the steps of placing a pretreatment frame 5 in a container, pouring liquid glue into the container to enable the liquid glue to completely immerse the pretreatment frame 5 in the container, vibrating the container and the pretreatment frame 5 to enable the liquid glue to be filled between adjacent carbon fiber yarns 1 and to be fully contacted with the carbon fiber yarns 1, vacuumizing the container to remove bubbles in the glue, wherein the vacuumizing time is more than 20 minutes, and the vacuum degree is-0.09 MPa. After bubbles are removed, heating the container, the pretreatment frame 5 and the liquid glue at the same time to fix the carbon fiber filaments 1 and the liquid glue and form a prefabricated product 6 positioned in the through hole, wherein the baking temperature is 100-120 ℃, and the baking time is 30-60 minutes;
the liquid glue is formed by mixing 50 g of 1000 mPa.s vinyl silicone oil, 10 g of 10000 mPa.s vinyl silicone oil, 10 g of MQ resin, 0.1 g of retarder, 3 g of hydrogen-containing silicone oil and 1.4 g of platinum catalyst, the viscosity of the liquid glue is less than 50000 mPa.s, and the viscosity is selected to be 5000 mPa.s in the embodiment, so that the liquid glue has better fluidity;
s5: simultaneously taking out the winding frame 2 and the prefabricated product 6 from the container, then cutting the carbon fiber wire 1 along the inner wall of the through hole to separate the carbon fiber wire 1 in the through hole from the carbon fiber wire 1 attached to the winding frame 2, and then moving the prefabricated product 6 and the winding frame 2 towards two directions away from each other to separate the winding frame 2 from the prefabricated product 6;
s6: cutting the prefabricated product 6 into a plurality of semi-finished products 7 according to the required thickness along the direction vertical to the carbon fiber wire 1, wherein the cutting mode is one of ultrasonic cutting, infrared cutting, plasma arc cutting or hob cutter cutting;
s7: fixing one end face of the semi-finished product 7 prepared in the step S6 by using a sucking disc, then polishing the other end face of the semi-finished product 7 by using a soft wool roller, turning the semi-finished product 7 by 180 degrees after polishing one end face, adsorbing the polished end face by using the sucking disc, and polishing the non-polished end face by using the soft wool roller, thereby obtaining a finished heat-conducting gasket product which is in contact with the electronic element and has a smooth surface, wherein the rotating speed of the soft wool roller is 3000 r/min.
The arrangement direction of the carbon fiber wires 1 is directly positioned, so that the included angle between the carbon fiber wires is smaller, the carbon fiber wires 1 are closer to a parallel state, the positions between the carbon fiber wires 1 are limited by glue to form a heat conduction gasket of the carbon fiber wires 1 facing to one direction, the direction of the carbon fiber wires 1 in the forming process is determined more easily, and the production process is more convenient.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A forming process of a carbon fiber-containing oriented ordered heat conducting gasket is characterized by comprising the following steps: the method comprises the following steps:
s1: providing a plurality of winding frames (2) and carbon fiber filaments (1), wherein through grooves penetrate through the end surfaces of the winding frames (2);
s2: winding the carbon fiber filaments (1) on the outer surface of the winding frame (2), keeping the carbon fiber filaments (1) on the same side of the winding frame (2) parallel to each other, and leaving gaps between the adjacent carbon fiber filaments (1) on the same side of the winding frame (2);
s3: stacking and accumulating a plurality of winding frames (2) which finish winding the carbon fiber yarns (1) from bottom to top to form a pretreatment frame (5), wherein the winding directions of the carbon fiber yarns (1) of adjacent winding frames (2) are the same;
s4: placing the pretreatment frame (5) in a container and pouring liquid glue, completely immersing the pretreatment frame (5) by the liquid glue, vacuumizing the container to remove air bubbles in the glue, and then heating and curing the glue to fix the carbon fiber filaments (1) and the glue and form a prefabricated product (6) positioned in the through hole;
s5: cutting the carbon fiber wire (1) along the inner wall of the through hole, and then moving the winding frame (2) and the prefabricated product (6) towards two directions away from each other, so that the prefabricated product (6) is separated from the winding frame (2);
s6: cutting the preform (6) into a plurality of semi-finished products (7) according to the required thickness along the direction vertical to the carbon fiber filaments (1);
s7: and (4) sequentially polishing two end surfaces of the semi-finished product (7) obtained in the step (S6) so as to obtain a finished heat-conducting gasket with a smooth surface.
2. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 1, wherein: in S1, the thickness of the bobbin frame (2) is 0.15 mm.
3. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 2, wherein: in the S2, the distance between the adjacent carbon fiber filaments (1) on the same side of the winding frame (2) is less than 0.2 mm.
4. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 3, wherein: in the step S3, when the winding frames (2) are stacked and added, the barrier ribs (3) are provided between the adjacent winding frames (2) so that the distance between the adjacent winding frames (2) is equal to the distance between the adjacent carbon fiber filaments (1) located on the side wall of the same winding frame (2).
5. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 4, wherein: in the S3, the superposed height of the winding frame (2) is between 125 and 150 mm.
6. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 5, wherein: and S4, controlling the container to vibrate before vacuumizing the container, so that the glue is filled in the gaps between the adjacent carbon fiber filaments (1).
7. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 6, wherein: in the S4, the vacuumizing time is more than 20 minutes, and the vacuum degree is-0.09 MPa.
8. The forming process of carbon fiber containing directionally ordered heat conducting gasket as claimed in claim 7, wherein: and S7, adsorbing the bottom surface of the semi-finished product (7) by using a sucking disc during polishing so as to polish the upper end of the semi-finished product (7) by using a soft wool roller, turning the semi-finished product (7) by 180 degrees after polishing one surface, adsorbing the polished end surface by using the sucking disc, and polishing the non-polished end surface by using the soft wool roller, wherein the rotating speed of the soft wool roller is 3000 r/min.
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| CN202010997295.XA CN112140595A (en) | 2020-09-21 | 2020-09-21 | Forming process of carbon fiber-containing oriented ordered heat-conducting gasket |
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| CN202010997295.XA CN112140595A (en) | 2020-09-21 | 2020-09-21 | Forming process of carbon fiber-containing oriented ordered heat-conducting gasket |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112938649A (en) * | 2021-01-29 | 2021-06-11 | 深圳市鸿富诚屏蔽材料有限公司 | Chemical treatment type carbon fiber sequencing process and carbon fiber cutting device |
| CN112936929A (en) * | 2021-01-29 | 2021-06-11 | 深圳市鸿富诚屏蔽材料有限公司 | Knitted fiber sorting process and auxiliary jig |
| CN113002007A (en) * | 2021-02-25 | 2021-06-22 | 深圳市鸿富诚屏蔽材料有限公司 | Forming process and sequencing device for carbon fiber heat-conducting and electric-conducting material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111300917A (en) * | 2020-03-10 | 2020-06-19 | 东莞市高酷纳米科技有限公司 | Anisotropic composite section and preparation method thereof |
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2020
- 2020-09-21 CN CN202010997295.XA patent/CN112140595A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111300917A (en) * | 2020-03-10 | 2020-06-19 | 东莞市高酷纳米科技有限公司 | Anisotropic composite section and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112938649A (en) * | 2021-01-29 | 2021-06-11 | 深圳市鸿富诚屏蔽材料有限公司 | Chemical treatment type carbon fiber sequencing process and carbon fiber cutting device |
| CN112936929A (en) * | 2021-01-29 | 2021-06-11 | 深圳市鸿富诚屏蔽材料有限公司 | Knitted fiber sorting process and auxiliary jig |
| CN112936929B (en) * | 2021-01-29 | 2022-08-02 | 深圳市鸿富诚新材料股份有限公司 | Knitted fiber sorting process and auxiliary jig |
| CN113002007A (en) * | 2021-02-25 | 2021-06-22 | 深圳市鸿富诚屏蔽材料有限公司 | Forming process and sequencing device for carbon fiber heat-conducting and electric-conducting material |
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Address after: 518100 1st, 2nd and 3rd floors, building C, No.7 Fuyong East Avenue, Fenghuang community, Fuyong street, Bao'an District, Shenzhen City, Guangdong Province; 7th floor, Huayuan phase III, Fenghuang first industrial zone Applicant after: Shenzhen hongfucheng New Material Co.,Ltd. Address before: 518100 1st, 2nd and 3rd floors, building C, No.7 Fuyong East Avenue, Fenghuang community, Fuyong street, Bao'an District, Shenzhen City, Guangdong Province; 7th floor, Huayuan phase III, Fenghuang first industrial zone Applicant before: SHENZHEN HFC SHIELDING PRODUCTS Co.,Ltd. |
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