CN117303904A - Production process of heat dissipation film - Google Patents
Production process of heat dissipation film Download PDFInfo
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- CN117303904A CN117303904A CN202310807716.1A CN202310807716A CN117303904A CN 117303904 A CN117303904 A CN 117303904A CN 202310807716 A CN202310807716 A CN 202310807716A CN 117303904 A CN117303904 A CN 117303904A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 69
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 219
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 219
- 239000010439 graphite Substances 0.000 claims abstract description 219
- 238000010438 heat treatment Methods 0.000 claims abstract description 94
- 239000002994 raw material Substances 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000012216 screening Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 83
- 239000000047 product Substances 0.000 claims description 78
- 238000003825 pressing Methods 0.000 claims description 43
- 239000011265 semifinished product Substances 0.000 claims description 33
- 238000005520 cutting process Methods 0.000 claims description 31
- 230000000694 effects Effects 0.000 claims description 13
- 238000003490 calendering Methods 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 12
- 230000003197 catalytic effect Effects 0.000 claims description 8
- 230000004927 fusion Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 6
- 238000003892 spreading Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims 1
- 238000007499 fusion processing Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62218—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic films, e.g. by using temporary supports
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3672—Foil-like cooling fins or heat sinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
- H01L23/3731—Ceramic materials or glass
Abstract
The invention discloses a production process of a heat dissipation film, and relates to the technical field of heat dissipation film production. The method comprises the following steps: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body; step two: and (3) heating and detecting: and (3) placing the graphite body generated in the step (I) into the heating device (1), and arranging a detection device (2) outside the heating device (1). According to the invention, the larger graphite raw materials can be screened out through the filter screen in the screening device, so that the quality of the graphite raw materials can be greatly improved, and meanwhile, the heating device (1) and the detecting device (2) are arranged to be used for detecting the heat resistance of the graphite raw materials, so that the graphite raw materials with poor heat resistance are prevented from affecting the quality of the graphite heat dissipation film.
Description
Technical Field
The invention relates to the technical field of heat dissipation film production, in particular to a heat dissipation film production process.
Background
The graphite heat dissipation film is a brand new heat conduction and dissipation material, has unique grain orientation, uniformly conducts heat along two directions, has a lamellar structure, can be well adapted to any surface, shields heat sources and components, and improves the performance of consumer electronic products. As the electronic products are made thinner, the graphite material is made thinner, and the characteristics of higher efficiency, conductivity, heat dissipation and the like are achieved. Various performances of the existing electronic products are continuously improved, for example, a smart phone adopts a dual-core processor, a quad-core processor and the like to improve the performances, so that the temperature generated by the product is also increased, and the product is required to be thinner, so that the thickness requirement of a used graphite heat dissipation film is also thinner.
The existing graphite heat dissipation film has the problem that graphite raw materials are different in size in the processing process, so that the probability of defective products in the processing process is high, meanwhile, the temperature detection cannot be carried out on the graphite raw materials, further, the heat resistance of the graphite raw materials with different impurity contents cannot be obtained, and better graphite raw materials cannot be selected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a production process of a heat dissipation film, which solves the problems in the background art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a heat dissipation film production process comprises
Step one: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body;
step two: and (3) heating and detecting: placing the graphite body generated in the first step into a heating device, arranging a detection device outside the heating device, setting the heating device to a required temperature, detecting the heat-resistant effect of the graphite body by using the detection device, detecting the electric conductivity and the heat conductivity of the graphite body by using the detection device, judging whether the graphite body is damaged according to the electric conductivity and the heat conductivity of the graphite body, taking out the graphite body which is poor in heat resistance and damaged, and making the graphite body which is detected by the heat resistance into a sheet shape and rolling and storing the graphite body;
step three: and (3) laminating: placing the base layer film material on a pressing device, placing the flaky graphite body generated in the second step on the top of the base layer film material, generating downward pressure on the top of the graphite body through a downward pressing structure, fusing the base layer film material and the graphite body to form a flaky to-be-processed product, and winding and storing the flaky to-be-processed product again;
step four: fusion: spreading the rolled product to be processed in the third step, placing the rolled product into a heating device in the second step, controlling the temperature in the heating device to enable molecules in a base layer film material and a graphite body in the product to be processed to be more active, heating and fusing the base layer film material and the graphite body, generating a semi-finished product, and improving the stability of the semi-finished product;
step five: calendering: placing the semi-finished product obtained in the step four on a hydraulic press, starting a hydraulic press switch, and pressing a pressing end of the hydraulic press to generate pressure on the semi-finished product, wherein the semi-finished product is flattened and has larger area, so that a large-area graphite heat dissipation film product is formed by calendering;
step six: cutting: placing the graphite heat dissipation film product obtained in the step five on a cutting table, and cutting the graphite heat dissipation film product by using a cutting device to obtain a small-block-shaped graphite heat dissipation film product with a required area;
step seven: and (3) recycling: and step six, after the graphite heat dissipation film product is cut, recycling the cut leftover materials by using a collecting device, and reusing the leftover materials.
Preferably, a crushing mechanism is further arranged in the first step, and after the larger graphite raw materials are screened, the larger graphite raw materials are crushed through the crushing mechanism, so that fine graphite raw materials are obtained, and the utilization effect of the graphite raw materials is improved.
Preferably, the specific temperature threshold of the heating device in the second step is set depending on the impurity content in the graphite body, and the detecting device detects whether the graphite body is damaged or not in combination with the electric conductivity and the thermal conductivity of the graphite body in the heating process.
Preferably, before the base layer film material in the third step is attached to the graphite body, a liquid catalytic connecting material is filled between the base layer film material and the graphite body, and in the subsequent attaching process, the catalytic connecting material can improve the connection tightness between the base layer film material and the graphite body.
Preferably, the heating temperature of the heating device in the fourth step is smaller than the heating temperature of the heating device in the second step, and the heating temperature of the heating device in the fourth step is smaller than the maximum bearing value of the base layer film material in the product to be processed.
Preferably, the pressing end of the hydraulic press in the fifth step is connected with a pressing plate, and the pressing end of the hydraulic press is detachably connected with the pressing plate through bolts and nuts, so that replacement and adjustment can be performed when semi-finished products with different sizes are pressed down, and meanwhile the damaged pressing plate is convenient to replace.
Preferably, in the step six, in the slitting process, the single-area adjustable die is placed on the graphite heat-dissipating film product, each area in the die is surrounded by a plurality of baffles which are installed on the die by screw threads, the positions of the baffles can be adjusted by the screws, the size of the single area in the die is adjusted to be a required area, and the graphite heat-dissipating film product in the single area in the die is cut by using a pressing-down type cutting device, so that the required graphite heat-dissipating film product is obtained.
Preferably, in the seventh step, the leftover materials recovered by the collecting device are placed in the heating device for reheating, the heating temperature of the heating device is obviously increased, and the heating temperature value is between the maximum bearing value of the base layer film material and the maximum bearing value of the graphite body, so that the base layer film material is damaged, and the graphite body in the graphite heat dissipation film leftover materials is separated.
The invention provides a production process of a heat dissipation film. The beneficial effects are as follows:
(1) According to the invention, the larger graphite raw materials can be screened out by screening the graphite raw materials through the filter screen in the screening device, so that the quality of the graphite raw materials can be greatly improved, and meanwhile, the heating device and the detecting device are arranged and can be used for detecting the heat resistance of the graphite raw materials, so that the graphite raw materials with poor heat resistance are prevented from affecting the quality of the graphite heat dissipation film.
(2) According to the invention, the utilization rate of the graphite raw material can be improved by arranging the crushing mechanism to crush the larger graphite raw material, and meanwhile, when the heating device heats the graphite bodies with different impurity contents, the heat-resistant effect of the different graphite bodies can be obtained, so that enterprises can judge whether certain quality is required to be reduced to obtain larger profits on the premise of ensuring the heat-radiating effect of the graphite bodies.
(3) According to the invention, the connection compactness between the base layer film material and the graphite body can be improved by arranging the catalytic connection material, and the heating temperature of the heating device in the fourth step is smaller than that of the heating device in the second step, so that the chemical and physical properties of the base layer film material and the graphite body can be prevented from being damaged in the fusion process.
(4) According to the invention, the processing efficiency can be improved by arranging the pressing plate, a plurality of graphite heat dissipation films with the same size can be cut at one time by the single-area adjustable die, and the heating temperature value in the seventh step is between the maximum bearing value of the base layer film material and the maximum bearing value of the graphite body, so that the base layer film material can be damaged, and the required graphite body is obtained.
Drawings
FIG. 1 is a flow chart of the whole invention;
FIG. 2 is a partial cross-sectional view of a heating device of the present invention;
FIG. 3 is a schematic diagram of a mold structure according to the present invention.
In the figure, 1, a heating device; 2. a detection device; 3. a mold; 31. a baffle; 32. a screw; 4. a pressing down type cutting device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1-3, the present embodiment provides a technical solution: a heat dissipation film production process comprises
Step one: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body;
step two: and (3) heating and detecting: the graphite body generated in the first step is placed into the heating device 1, the detection device 2 is arranged outside the heating device 1, the heating device 1 is set to be at a required temperature, the detection device 2 is used for detecting the heat-resistant effect of the graphite body, the detection device 2 can detect the electric conductivity and the heat conductivity of the graphite body, whether the graphite body is damaged or not is judged according to the electric conductivity and the heat conductivity of the graphite body, in the detection process of the electric conductivity and the heat conductivity, the heated graphite body is placed in a heat conduction tester with the model of HS-DR-5 for detection, and the detection principle of the heat conduction tester is as follows: a planar probe is made of a heat resistant material and is used as a heat source and a temperature sensor. The relationship between the thermal coefficient of the alloy and the temperature is in a linear relationship, namely the heat loss can be known by knowing the change of the resistance, so that the heat conduction performance of a sample is reflected, whether the heat conduction performance of a graphite body is affected or not is judged, a universal meter is implanted in a circuit, the electric conductivity of the graphite body can be obtained by detecting the change of the current, the graphite body which is poor in heat resistance and damaged is taken out, and the graphite body which is detected by the heat resistance is manufactured into a sheet shape and is rolled and stored;
step three: and (3) laminating: placing the base layer film material on a pressing device, placing the flaky graphite body generated in the second step on the top of the base layer film material, generating downward pressure on the top of the graphite body through a downward pressing structure, fusing the base layer film material and the graphite body to form a flaky to-be-processed product, and winding and storing the flaky to-be-processed product again;
step four: fusion: spreading out the rolled product to be processed in the third step, placing the rolled product into the heating device 1 in the second step, controlling the temperature in the heating device 1 to enable molecules in the base layer film material and the graphite body in the product to be processed to be more active, heating and fusing the base layer film material and the graphite body, generating a semi-finished product, and improving the stability of the semi-finished product;
step five: calendering: placing the semi-finished product obtained in the step four on a hydraulic press, starting a hydraulic press switch, and pressing a pressing end of the hydraulic press to generate pressure on the semi-finished product, wherein the semi-finished product is flattened and has larger area, so that a large-area graphite heat dissipation film product is formed by calendering;
step six: cutting: placing the graphite heat dissipation film product obtained in the step five on a cutting table, and cutting the graphite heat dissipation film product by using a cutting device to obtain a small-block-shaped graphite heat dissipation film product with a required area;
step seven: and (3) recycling: and step six, after the graphite heat dissipation film product is cut, recycling the cut leftover materials by using a collecting device, and reusing the leftover materials.
And in the first step, a crushing mechanism is further arranged in the process, and after the larger graphite raw materials are screened, the larger graphite raw materials are crushed through the crushing mechanism, so that fine graphite raw materials are obtained, and the utilization effect of the graphite raw materials is improved.
The specific temperature threshold of the heating device 1 in the second step is set according to the impurity content in the graphite body, and the detecting device 2 detects whether the graphite body is damaged or not by combining the electric conductivity and the thermal conductivity of the graphite body in the heating process.
The filter screen inside the screening device screens out larger graphite raw materials, so that the quality of the graphite raw materials can be greatly improved, and meanwhile, the heating device 1 and the detecting device 2 can be used for detecting the heat resistance of the graphite raw materials, so that the graphite raw materials with poor heat resistance are prevented from affecting the quality of the graphite heat dissipation film.
Example 2
Referring to fig. 1-3, the present embodiment provides a technical solution: a heat dissipation film production process comprises
Step one: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body;
step two: and (3) heating and detecting: placing the graphite body generated in the first step into the heating device 1, arranging a detection device 2 outside the heating device 1, setting the heating device 1 at a required temperature, detecting the heat-resistant effect of the graphite body by using the detection device 2, detecting the electric conductivity and the heat conductivity of the graphite body by the detection device 2, judging whether the graphite body is damaged according to the electric conductivity and the heat conductivity of the graphite body, taking out the graphite body with poor heat resistance and damage, and making the graphite body passing the heat resistance detection into a sheet shape and rolling and storing;
step three: and (3) laminating: placing the base layer film material on a pressing device, placing the flaky graphite body generated in the second step on the top of the base layer film material, generating downward pressure on the top of the graphite body through a downward pressing structure, fusing the base layer film material and the graphite body to form a flaky to-be-processed product, and winding and storing the flaky to-be-processed product again;
step four: fusion: spreading out the rolled product to be processed in the third step, placing the rolled product into the heating device 1 in the second step, controlling the temperature in the heating device 1 to enable molecules in the base layer film material and the graphite body in the product to be processed to be more active, heating and fusing the base layer film material and the graphite body, generating a semi-finished product, and improving the stability of the semi-finished product;
step five: calendering: placing the semi-finished product obtained in the step four on a hydraulic press, starting a hydraulic press switch, and pressing a pressing end of the hydraulic press to generate pressure on the semi-finished product, wherein the semi-finished product is flattened and has larger area, so that a large-area graphite heat dissipation film product is formed by calendering;
step six: cutting: placing the graphite heat dissipation film product obtained in the step five on a cutting table, and cutting the graphite heat dissipation film product by using a cutting device to obtain a small-block-shaped graphite heat dissipation film product with a required area;
step seven: and (3) recycling: and step six, after the graphite heat dissipation film product is cut, recycling the cut leftover materials by using a collecting device, and reusing the leftover materials.
Before the base layer film material and the graphite body are attached, liquid catalytic connecting materials are filled between the base layer film material and the graphite body, and in the follow-up attaching process, the catalytic connecting materials can improve the connection tightness between the base layer film material and the graphite body.
The heating temperature of the heating device 1 in the fourth step is smaller than that of the heating device 1 in the second step, and the heating temperature of the heating device 1 in the fourth step is smaller than the maximum bearing value of the base layer film material in the product to be processed.
The utilization rate of graphite raw materials can be improved by arranging the crushing mechanism to crush larger graphite raw materials, and meanwhile, when the heating device 1 heats graphite bodies with different impurity contents, the heat-resistant effect of different graphite bodies can be obtained, so that enterprises can judge whether to reduce certain quality to obtain larger profits on the premise of ensuring the heat-radiating effect of the graphite bodies.
Example 3
Referring to fig. 1-3, the present embodiment provides a technical solution: a heat dissipation film production process comprises
Step one: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body;
step two: and (3) heating and detecting: placing the graphite body generated in the first step into the heating device 1, arranging a detection device 2 outside the heating device 1, setting the heating device 1 at a required temperature, detecting the heat-resistant effect of the graphite body by using the detection device 2, detecting the electric conductivity and the heat conductivity of the graphite body by the detection device 2, judging whether the graphite body is damaged according to the electric conductivity and the heat conductivity of the graphite body, taking out the graphite body with poor heat resistance and damage, and making the graphite body passing the heat resistance detection into a sheet shape and rolling and storing;
step three: and (3) laminating: placing the base layer film material on a pressing device, placing the flaky graphite body generated in the second step on the top of the base layer film material, generating downward pressure on the top of the graphite body through a downward pressing structure, fusing the base layer film material and the graphite body to form a flaky to-be-processed product, and winding and storing the flaky to-be-processed product again;
step four: fusion: spreading out the rolled product to be processed in the third step, placing the rolled product into the heating device 1 in the second step, controlling the temperature in the heating device 1 to enable molecules in the base layer film material and the graphite body in the product to be processed to be more active, heating and fusing the base layer film material and the graphite body, generating a semi-finished product, and improving the stability of the semi-finished product;
step five: calendering: placing the semi-finished product obtained in the step four on a hydraulic press, starting a hydraulic press switch, and pressing a pressing end of the hydraulic press to generate pressure on the semi-finished product, wherein the semi-finished product is flattened and has larger area, so that a large-area graphite heat dissipation film product is formed by calendering;
step six: cutting: placing the graphite heat dissipation film product obtained in the step five on a cutting table, and cutting the graphite heat dissipation film product by using a cutting device to obtain a small-block-shaped graphite heat dissipation film product with a required area;
step seven: and (3) recycling: and step six, after the graphite heat dissipation film product is cut, recycling the cut leftover materials by using a collecting device, and reusing the leftover materials.
The connection compactness between the base layer film material and the graphite body can be improved by arranging the catalytic connection material, and the heating temperature of the heating device 1 in the fourth step is smaller than that of the heating device 1 in the second step, so that the chemical and physical properties of the base layer film material and the graphite body can be prevented from being damaged in the fusion process.
Example 4
Referring to fig. 1-3, the present embodiment provides a technical solution: a heat dissipation film production process comprises
Step one: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body;
step two: and (3) heating and detecting: placing the graphite body generated in the first step into the heating device 1, arranging a detection device 2 outside the heating device 1, setting the heating device 1 at a required temperature, detecting the heat-resistant effect of the graphite body by using the detection device 2, detecting the electric conductivity and the heat conductivity of the graphite body by the detection device 2, judging whether the graphite body is damaged according to the electric conductivity and the heat conductivity of the graphite body, taking out the graphite body with poor heat resistance and damage, and making the graphite body passing the heat resistance detection into a sheet shape and rolling and storing;
step three: and (3) laminating: placing the base layer film material on a pressing device, placing the flaky graphite body generated in the second step on the top of the base layer film material, generating downward pressure on the top of the graphite body through a downward pressing structure, fusing the base layer film material and the graphite body to form a flaky to-be-processed product, and winding and storing the flaky to-be-processed product again;
step four: fusion: spreading out the rolled product to be processed in the third step, placing the rolled product into the heating device 1 in the second step, controlling the temperature in the heating device 1 to enable molecules in the base layer film material and the graphite body in the product to be processed to be more active, heating and fusing the base layer film material and the graphite body, generating a semi-finished product, and improving the stability of the semi-finished product;
step five: calendering: placing the semi-finished product obtained in the step four on a hydraulic press, starting a hydraulic press switch, and pressing a pressing end of the hydraulic press to generate pressure on the semi-finished product, wherein the semi-finished product is flattened and has larger area, so that a large-area graphite heat dissipation film product is formed by calendering;
step six: cutting: placing the graphite heat dissipation film product obtained in the step five on a cutting table, and cutting the graphite heat dissipation film product by using a cutting device to obtain a small-block-shaped graphite heat dissipation film product with a required area;
step seven: and (3) recycling: and step six, after the graphite heat dissipation film product is cut, recycling the cut leftover materials by using a collecting device, and reusing the leftover materials.
And in the fifth step, the pressing end of the hydraulic press is connected with a pressing plate, and the pressing end of the hydraulic press is detachably connected with the pressing plate through bolts and nuts, so that replacement and adjustment can be performed when semi-finished products with different sizes are pressed down, and meanwhile, the damaged pressing plate is convenient to replace.
In the cutting process in the step six, the single-area adjustable die 3 is placed on a graphite heat-dissipation film product, each area in the die 3 is surrounded by a plurality of baffles 31 which are installed on the die 3 through screw threads by using screws 32, the positions of the baffles 31 can be adjusted through the screws 32, the size of the single area in the die 3 is adjusted to be a required area, and the graphite heat-dissipation film product in the single area in the die 3 is cut by using a pressing-down type cutting device 4, so that the required graphite heat-dissipation film product is obtained.
And seventhly, placing the leftover materials recovered by the collecting device in the heating device 1 for reheating, obviously improving the heating temperature of the heating device 1, wherein the heating temperature value is between the maximum bearing value of the base layer film material and the maximum bearing value of the graphite body, damaging the base layer film material, and separating the graphite body from the leftover materials of the graphite heat dissipation film.
The processing efficiency can be improved by arranging the pressing plate, a plurality of graphite heat dissipation films with the same size can be cut out at one time by the single-region adjustable die 3, and the heating temperature value in the seventh step is between the maximum bearing value of the base layer film material and the maximum bearing value of the graphite body, so that the base layer film material can be damaged, and the required graphite body is obtained.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (8)
1. A production process of a heat dissipation film is characterized in that: comprising
Step one: treating raw materials: placing graphite raw materials into a screening device, arranging a filtering screen in the screening device, screening the graphite raw materials larger than the screen holes through the screen, and processing the screened fine raw materials to form a graphite body;
step two: and (3) heating and detecting: placing the graphite body generated in the first step into a heating device (1), arranging a detection device (2) outside the heating device (1), setting the heating device (1) to a required temperature, detecting the heat-resistant effect of the graphite body by using the detection device (2), detecting the electric conductivity and the heat conductivity of the graphite body by the detection device (2), judging whether the graphite body is damaged according to the electric conductivity and the heat conductivity of the graphite body, taking out the graphite body with poor heat resistance and damage, and making the graphite body detected by the heat resistance into a sheet shape and rolling for storage;
step three: and (3) laminating: placing the base layer film material on a pressing device, placing the flaky graphite body generated in the second step on the top of the base layer film material, generating downward pressure on the top of the graphite body through a downward pressing structure, fusing the base layer film material and the graphite body to form a flaky to-be-processed product, and winding and storing the flaky to-be-processed product again;
step four: fusion: spreading out the rolled product to be processed in the third step and placing the rolled product into the heating device (1) in the second step, controlling the temperature in the heating device (1) to enable molecules in the base layer film material and the graphite body in the product to be processed to be more active, thereby heating and fusing the base layer film material and the graphite body, generating a semi-finished product and improving the stability of the semi-finished product;
step five: calendering: placing the semi-finished product obtained in the step four on a hydraulic press, starting a hydraulic press switch, and pressing a pressing end of the hydraulic press to generate pressure on the semi-finished product, wherein the semi-finished product is flattened and has larger area, so that a large-area graphite heat dissipation film product is formed by calendering;
step six: cutting: placing the graphite heat dissipation film product obtained in the step five on a cutting table, and cutting the graphite heat dissipation film product by using a cutting device to obtain a small-block-shaped graphite heat dissipation film product with a required area;
step seven: and (3) recycling: and step six, after the graphite heat dissipation film product is cut, recycling the cut leftover materials by using a collecting device, and reusing the leftover materials.
2. The process for producing a heat dissipation film according to claim 1, wherein: the inside in step one still is provided with crushing mechanism, and after bigger graphite raw materials were screened down, the big graphite raw materials were broken through crushing mechanism to obtain fine graphite raw materials, improve graphite raw materials and utilize the effect.
3. The process for producing a heat dissipation film according to claim 1, wherein: the specific temperature threshold of the heating device (1) in the second step is set depending on the impurity content in the graphite body, and the detection device (2) detects whether the graphite body is damaged or not by combining the electric conductivity and the thermal conductivity of the graphite body in the heating process.
4. The process for producing a heat dissipation film according to claim 1, wherein: before the base layer film material in the third step is attached to the graphite body, a liquid catalytic connecting material is filled between the base layer film material and the graphite body, and in the subsequent attaching process, the catalytic connecting material can improve the connection tightness between the base layer film material and the graphite body.
5. The process for producing a heat dissipation film according to claim 1, wherein: the heating temperature of the heating device (1) in the fourth step is smaller than that of the heating device (1) in the second step, and the heating temperature of the heating device (1) in the fourth step is smaller than the maximum bearing value of the base layer film material in the product to be processed.
6. The process for producing a heat dissipation film according to claim 1, wherein: the pressing end of the hydraulic press in the fifth step is connected with a pressing plate, and the pressing end of the hydraulic press is detachably connected with the pressing plate through bolts and nuts, so that replacement and adjustment can be performed when semi-finished products with different sizes are pressed down, and meanwhile the damaged pressing plate is convenient to replace.
7. The process for producing a heat dissipation film according to claim 1, wherein: in the cutting process in the step six, a single-area adjustable die (3) is placed on a graphite heat-dissipation film product, each area in the die (3) is surrounded by a plurality of baffles (31) which are installed on the die (3) through screw threads by using screws (32), the positions of the baffles (31) can be adjusted through the screws (32), the size of the single area in the die (3) is adjusted to be a required area, and a pressing type cutting device (4) is used for cutting the graphite heat-dissipation film product in the single area in the die (3), so that the required graphite heat-dissipation film product is obtained.
8. The process for producing a heat dissipation film according to claim 1, wherein: in the seventh step, the leftover materials recovered by the collecting device are placed in the heating device (1) for reheating, the heating temperature of the heating device (1) is obviously increased, the heating temperature value is between the maximum bearing value of the base layer film material and the maximum bearing value of the graphite body, the base layer film material is damaged, and the graphite body in the leftover materials of the graphite heat dissipation film is separated.
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