CN111417222B - Laser sintering film forming assembly line of graphene electric heating body and production method - Google Patents
Laser sintering film forming assembly line of graphene electric heating body and production method Download PDFInfo
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- CN111417222B CN111417222B CN202010377204.2A CN202010377204A CN111417222B CN 111417222 B CN111417222 B CN 111417222B CN 202010377204 A CN202010377204 A CN 202010377204A CN 111417222 B CN111417222 B CN 111417222B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 81
- 238000005485 electric heating Methods 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 28
- 238000007639 printing Methods 0.000 claims abstract description 85
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 239000012212 insulator Substances 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000011265 semifinished product Substances 0.000 claims description 59
- 238000012360 testing method Methods 0.000 claims description 56
- 239000000758 substrate Substances 0.000 claims description 49
- 239000000843 powder Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
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- 230000008569 process Effects 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 15
- 239000011241 protective layer Substances 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 238000001931 thermography Methods 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000010445 mica Substances 0.000 claims description 6
- 229910052618 mica group Inorganic materials 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000010586 diagram Methods 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004904 shortening Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 2
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- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
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- 238000007689 inspection Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004049 embossing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
Abstract
The invention discloses a laser sintering film forming assembly line of a graphene electric heating body and a production method thereof, comprising an assembly line conveying mechanism, and an electrode printing machine, a graphene heating body printing machine, a first laser, an insulating heat insulator printing machine and a second laser which are arranged on the assembly line conveying mechanism.
Description
Technical Field
The invention relates to the technical field of graphene electric heating, in particular to a laser sintering film forming assembly line of a graphene electric heating body and a production method.
Background
Graphene is one of the materials of greatest interest in recent years, which is one of the substances having the smallest thickness, the lightest mass and the greatest strength in the world, and is formed by arranging carbon atoms of a single layer in a honeycomb structure. Meanwhile, the graphene also has good thermal performance, and researches show that the graphene is the substance with highest thermal conductivity in the world, the thermal conductivity coefficient is up to 5000W/m.K, the thermal conductivity is 50-100 times of that of common metal, the seepage threshold is only 0.2wt%, and a single-layer two-dimensional structure of the graphene is easy to form a thermal conduction channel in a matrix, so that the graphene is an ideal filler for improving the thermal conductivity.
The graphene heating material is a novel material for converting electric energy into heat energy, and is different from an electric heating tube, a heating wire, a microwave generator, an electromagnetic generator, light wave radiant heat and other heating modes, and the graphene heating material can directly convert electric energy into heat energy in a conductive mode and can transfer the heat energy into air in a radiation and conduction mode.
The graphene heating material is initiated in the electrothermal base material, is attached to any carrier by the self electrothermal characteristic, can be made into a heating body with any power, and can be suitable for being used in alternating current and direct current environments with various voltages. The basic heating element has simple manufacturing process and can be manufactured by adopting modes of spraying, printing, film, bonding, coating, electroplating and the like.
However, the existing graphene heating element production process and production mode have the disadvantages of complex flow, large manual operation amount, low production efficiency, high production labor cost, high production energy consumption and large industrial emission.
Disclosure of Invention
In order to solve the problems, the invention provides a laser sintering film forming assembly line of a graphene electric heating body, which comprises an assembly line conveying mechanism composed of a plurality of conveying devices, and an electrode printing machine, a graphene heating body printing machine, a first laser, an insulating heat insulator printing machine and a second laser which are sequentially arranged on the assembly line conveying mechanism, wherein a substrate surface cleaner is arranged on the conveying device at the input end of the assembly line conveying mechanism, a dust remover is arranged on the conveying device between the substrate surface cleaner and the electrode printing machine, a thermal imaging flaw detection device is arranged on the conveying device at the output end of the assembly line conveying mechanism, an electrifying test device is arranged on the conveying device between the thermal imaging flaw detection device and the second laser, a first dryer is arranged between the electrode printing machine and the graphene heating body printing machine, a second dryer is arranged between the graphene heating body printing machine and the first laser, and a third dryer is arranged between the insulating heat insulator printing machine and the second laser.
Further, the first laser and the second laser are driven by a numerical control system, a position monitor and a temperature measuring instrument are arranged on the first laser and the second laser, and the numerical control system realizes linkage automatic accurate control by the position monitor and the temperature measuring instrument.
Further, the power-on testing device comprises a first power-on testing end and a second power-on testing end along the transmission direction of the assembly line transmission mechanism, the first power-on testing end and the second power-on testing end are respectively arranged on the left side and the right side of the transmission equipment, the first power-on testing end and the second power-on testing end extend towards the inner side to form a plurality of press roll shafts, the press roll shafts are provided with flexible rotary power-on press rolls, and the power-on press rolls can adaptively adjust the pressure contact tightness between the power-on press rolls and a base body according to the thickness of the base body so as to ensure good electric connection between the power-on press rolls and the base body electrode; the center of the outer sides of the first electrifying test end and the second electrifying test end is provided with an electrifying end, the electrifying ends are respectively connected with an electrifying press roller and a power supply through electric conductivity, telescopic rods are arranged on two sides of the electrifying ends and fixedly connected with an electrifying test device through insulators, and therefore the telescopic rods are prevented from being electrified; the telescopic rod controls and adjusts the distance between the first power-on test end and the second power-on test end through extension and shortening.
A laser sintering film-forming production line production method of a graphene electric heating body comprises the following steps:
firstly, placing a substrate on conveying equipment, conveying the substrate to the lower part of a substrate surface cleaning machine to clean the surface of the substrate, conveying the substrate to the lower part of a dust remover through the conveying equipment after cleaning, and blowing away dust on the surface of the substrate by the dust remover;
placing a printing screen A on the substrate in the first step, then conveying the substrate to the lower part of an electrode printing machine, and spraying silver conductive paste on the printing screen A on the substrate through a graphene heating body printing machine to obtain a semi-finished product A printed with a metal electrode;
step three, conveying the semi-finished product A in the step two to a first dryer, and heating and drying the surface of the semi-finished product A by the first dryer;
step four, placing a printing screen B on the semi-finished product A in the step three, then conveying the semi-finished product A to the lower part of a graphene heating body printing machine, and spraying graphene electric heating body ink on the printing screen B on the semi-finished product A through the graphene heating body printing machine to obtain a semi-finished product B printed with a metal electrode and a graphene electric heating body;
step five, conveying the semi-finished product B in the step four to a second dryer, and heating and drying the surface of the semi-finished product B by the second dryer;
step six, conveying the semi-finished product B in the step five to the lower part of a first laser, performing first laser sintering on the semi-finished product B through the first laser, and sintering a metal electrode and a graphene electric heating body to form a film to obtain a semi-finished product C;
step seven, placing a printing screen C on the semi-finished product C in the step six, then conveying the semi-finished product C to the lower part of an insulating insulator printing machine, and spraying insulating insulator ink on the printing screen C on the semi-finished product C through the insulating insulator printing machine to obtain a semi-finished product D printed with a metal electrode, a graphene electric heating body and an insulating protective layer;
step eight, conveying the semi-finished product D in the step seven to a third dryer, and heating and drying the surface of the semi-finished product D by the third dryer to obtain a semi-finished product E;
step nine, conveying the semi-finished product E in the step eight to the lower part of a second laser, performing second laser sintering on the semi-finished product E through the second laser, and sintering the insulating heat-insulating protective layer to form a film to obtain a finished product;
and step ten, conveying the finished product in the step nine to a power-on testing device for power-on testing, gradually heating the finished product after the power-on testing, detecting whether the heating positions of the finished product are uniform or not through a thermal imaging flaw detection device, and then sorting the product.
Further, the printing screen A in the second step is 180-250 meshes.
Further, the printing screen B in the third step and the printing screen C in the sixth step are 100-200 meshes.
Further, the first dryer, the second dryer and the third dryer in the third step, the fifth step and the seventh step are infrared light waves or resistance heating tunnel type electric dryers heated by infrared light waves or silicon molybdenum rods. The heating temperature can be flexibly set and adjusted between normal temperature and 400 ℃ and intelligently controlled constantly.
Further, the laser sintering temperature of the first laser and the second laser in the fifth step and the eighth step is 500-1000 ℃.
Further, the graphene electric heating body ink in the third step is prepared from graphene powder, far infrared emitting agent, FB resin powder and ethanol according to a formula proportion.
Further, the insulating insulator ink in the step six is prepared from mica powder, porcelain powder, quartz powder, FB resin powder and ethanol according to the formula proportion.
Compared with the prior art, the invention has the beneficial effects that: according to the laser sintering film forming assembly line and the production method of the graphene electric heating body, disclosed by the invention, the substrate is conveyed to all processing equipment for processing through the assembly line conveying mechanism formed by a plurality of conveying equipment, wherein the metal electrode and the graphene electric heating body are sintered to form a film through the first laser, and then the insulating and heat-insulating protective layer is sintered to form a film through the second laser, so that the original production mode that the heating body is connected with the substrate and is heated integrally to form a film through sintering is omitted, the efficiency can be improved, the energy consumption can be reduced, the emission is reduced, the change of the performance of the substrate is not influenced, the performance of the substrate can be properly reduced, and the production cost is reduced. The invention can realize the automation of the production process, reduce the labor intensity of workers, improve the production efficiency, greatly reduce the production energy consumption, reduce the production industrial discharge, reduce the environmental pollution, accord with the national energy conservation and emission reduction policy, and have positive promotion significance for promoting energy conservation and emission reduction.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of a substrate surface cleaning process according to the present invention.
FIG. 3 is a schematic view of the structure of the primary sintering film forming process in the present invention.
FIG. 4 is a schematic structural view of a secondary sintering film forming process in the present invention.
FIG. 5 is a schematic diagram of the product inspection process according to the present invention.
FIG. 6 is a schematic diagram of the structure of the power-on test device in the present invention.
Fig. 7 is a schematic flow diagram of a framework of the present invention.
In the figure: the device comprises a conveying device 1, an electrode embossing machine 2, a graphene heating body embossing machine 3, a first laser 4, an insulating insulator embossing machine 5, a second laser 6, a substrate surface cleaning machine 7, a dust remover 8, a thermal imaging flaw detection device 9, an electrifying test device 10, a first electrifying test end 101, a second electrifying test end 102, a press roller shaft 103, an electrifying press roller 104, an electrifying end 105, a telescopic rod 106, a first dryer 11, a second dryer 12 and a third dryer 13.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention; furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying any relevant importance or quantity of technical features indicated; thus, the definition of "first", "second" is for descriptive purposes only and is not to be construed as indicating or implying any particular importance or implication for that one or more such features are included.
Referring to fig. 1 to 7, the laser sintering film forming assembly line of the graphene electric heating body provided by the invention comprises an assembly line conveying mechanism formed by a plurality of conveying devices 1, and an electrode printing machine 2, a graphene heating body printing machine 3, a first laser 4, an insulating heat insulator printing machine 5 and a second laser 6 which are sequentially arranged on the assembly line conveying mechanism, wherein a substrate surface cleaner 7 is arranged on the conveying device 1 at the input end of the assembly line conveying mechanism, a dust remover 8 is arranged on the conveying device 1 between the substrate surface cleaner 7 and the electrode printing machine 2, a thermal imaging flaw detection device 9 is arranged on the conveying device 1 at the output end of the assembly line conveying mechanism, an electrifying test device 10 is arranged between the thermal imaging flaw detection device 9 and the second laser 6, a first dryer 11 is arranged between the electrode printing machine 2 and the graphene heating body printing machine 3, a second dryer 12 is arranged between the insulating heat insulator printing machine 5 and the second laser 6, and a third dryer 13 is arranged between the insulating heat insulator printing machine 5 and the second laser 6; the production line conveying mechanism composed of a plurality of conveying devices 1 is used for conveying the insulating substrate to each processing device for processing, wherein the metal electrode and the graphene electric heating body are sintered to form a film through the first laser 4, and then the insulating heat insulation protective layer is sintered to form a film through the second laser 6, so that the original production mode that the heating body is connected with the substrate and is heated integrally to form a film through sintering is skipped, the efficiency can be improved, the energy consumption can be reduced, the industrial emission is reduced, the change of the substrate performance is not influenced, the substrate performance can be properly reduced, and the production cost is reduced. In addition, the invention can realize the automation of the production process, reduce the labor intensity of workers and improve the production efficiency.
As a further embodiment of the invention, the first laser 4 and the second laser 6 are driven by a numerical control system, and the first laser 4 and the second laser 6 are provided with a position monitor and a temperature measuring instrument, the numerical control system is controlled automatically by the linkage of the position monitor and the temperature measuring instrument, and the automatic production is controlled accurately by the cooperation of the position monitor, the temperature measuring instrument and the numerical control system.
As a further embodiment of the present invention, referring to fig. 5 and 6, the power-on test device 10 includes a first power-on test end 101 and a second power-on test end 102 along the transmission direction of the pipeline transmission mechanism, the first power-on test end 101 and the second power-on test end 102 are respectively installed at the left and right sides of the transmission device 1, the first power-on test end 101 and the second power-on test end 102 extend towards the inner side to form a plurality of press roll shafts 103, the press roll shafts 103 are sleeved with power-on press rolls 104 capable of flexibly rotating, and the power-on press rolls 104 can adaptively adjust the press contact tightness of the power-on press rolls 104 and the substrate according to the thickness of the substrate, so that reliable electric conduction connection between the power-on press rolls 104 and the substrate is ensured; the center of the outer sides of the first electrifying test end 101 and the second electrifying test end 102 is provided with an electrifying end 105, the electrifying ends 105 are respectively electrically connected with an electrifying press roller 104 and a power supply, two sides of the electrifying ends 105 are provided with telescopic rods 106, and the telescopic rods 106 are fixedly connected with the electrifying test device 10 through insulators, so that the telescopic rods 106 are ensured not to be electrified; the telescopic rod 106 controls and adjusts the distance between the first power-on test end 101 and the second power-on test end 102 through stretching and shortening; when the manufactured finished product is conveyed to a final product inspection procedure, metal electrodes on two sides of the graphene heating body are respectively contacted with an electrifying press roller 104 on a first electrifying test end 101 and electrifying press rollers 104 on a second electrifying test end 102, and as the electrifying press rollers 104 are arranged in a plurality along the transmission direction of a pipeline conveying mechanism, the first electrifying test end 101 and the second electrifying test end 102 are respectively connected with the input ends of a power supply, so that the metal electrodes are continuously connected with the power supply, the graphene heating body is electrified and heated, and then whether the heating positions of the finished product are uniform is detected by a thermal imaging flaw detection device 9; in addition, the compression roller type power-on electrode terminal can be controlled in a telescopic mode, so that the power-on electrode terminal can be suitable for a graphene heating body without a size.
The invention provides a production line production method of a graphene electric heating body, which comprises the following steps:
and (3) a substrate conveying process: placing the substrate on a conveying device 1 at the input end of a pipeline conveying mechanism;
substrate surface cleaning process: the substrate is conveyed to the lower part of the substrate surface cleaning machine 7 to wipe and clean the surface of the substrate, and after the cleaning is finished, the substrate is conveyed to the lower part of the dust remover 8 through the conveying equipment 1, and the dust remover 8 cleans dust on the surface of the substrate;
printing a metal electrode: when the substrate subjected to the substrate surface cleaning process is conveyed below the electrode printing machine 2, printing metal conductive paste on the substrate by the electrode printing machine 2 to prepare a semi-finished product A printed with a metal electrode layer; the electrode printing machine 2 is provided with a printing screen A, and the shape and pattern of the electrode are determined and realized by the printing screen A; wherein the printed metal electrode comprises and is not limited to other ink type materials which can be used for manufacturing electrodes, including sintering type conductive paste;
primary drying of the substrate: the semi-finished product A after the metal electrode printing process is conveyed to a first dryer 11, and the first dryer 11 carries out heating, drying and shaping on a metal conductive paste layer on the surface of the semi-finished product A;
printing a graphene heating body: when the semi-finished product A after the primary drying process is conveyed to the lower part of the graphene heating body decorating machine 3, printing graphene electric heating body ink on the semi-finished product A by the graphene heating body decorating machine 3 to obtain a semi-finished product B printed with a metal electrode and a graphene electric heating body; the printing screen B is arranged on the printing machine 3 of the graphene heating body, the shape and the pattern of the graphene electric heating body are determined and realized by the printing screen B,
and (3) a secondary drying process of the matrix: the semi-finished product B subjected to the graphene heating body printing process is conveyed to a second dryer 12, and the second dryer 12 heats and dries the semi-finished product B, and mainly performs proper drying and shaping on a graphene electric heating body ink layer just printed on the surface;
primary sintering film forming process: delivering the semi-finished product B after the secondary drying process to the lower part of the first laser 4, performing primary laser sintering on the semi-finished product B through the first laser 4, and sintering the metal electrode layer and the graphene electric heating body layer to form a film to obtain a semi-finished product C;
printing an insulating and heat-insulating process: when the semi-finished product C subjected to the primary sintering film forming process is conveyed below the insulating insulator printing machine 5, printing insulating insulator ink on the semi-finished product C by the insulating insulator printing machine 5 to prepare a semi-finished product D printed with a metal electrode, a graphene electric heating body and an insulating protective layer; the printing screen C is arranged on the insulating body printing machine 5, and the shape and pattern of the insulating and heat-insulating protective layer are determined and realized by the printing screen C;
and (3) a substrate three-time drying process: the semi-finished product D after the printing insulating heat-insulating process is conveyed to a third dryer 13, and the third dryer 13 heats and dries the semi-finished product D, mainly performs proper drying and shaping on an insulating heat-insulating protective layer just printed on the surface to prepare a semi-finished product E;
secondary sintering film forming process: when the semi-finished product E after the three drying procedures is conveyed below the second laser 6, the second laser sintering is carried out on the semi-finished product E through the second laser 6, and the insulating heat-insulating protective layer is sintered to form a film, so that a finished product is obtained;
product inspection procedure: conveying the finished product subjected to the secondary sintering film forming process to an electrifying test device 10 for electrifying test, wherein the finished product gradually heats during electrifying test, and detecting whether the heating position of the finished product is uniform or not through a heating imaging graph when the finished product subjected to the electrifying and heating passes through a thermal imaging flaw detection device 9;
the following steps of the product: and (3) judging whether the process of the heating element reaches the standard or not by entering a finished product after the product inspection process into the next process, and then conveying the product to the next process for sorting.
As a further embodiment of the invention, the screen A in step two is 180-250 mesh.
As a further embodiment of the present invention, the mesh screen B in the third step and the mesh screen C in the sixth step are 100-200 mesh.
As a further embodiment of the present invention, the first dryer 11, the second dryer 12 and the third dryer 13 in the third, the fifth and the seventh steps are infrared light wave or resistance heating tunnel type electric dryers which are heated by infrared light wave or silicon molybdenum rod; the heating temperature can be flexibly set and adjusted between normal temperature and 400 ℃ and intelligently controlled constantly.
As a further embodiment of the present invention, the laser sintering temperature of the first laser 4 and the second laser 6 in the fifth and eighth steps is 500-1000 ℃.
As a further embodiment of the present invention, the graphene electric heating body ink in the third step includes, but is not limited to, preparing graphene powder, far infrared emission agent, FB resin powder and ethanol according to a formula ratio, mixing the graphene powder, the far infrared emission agent and the FB resin powder, stirring uniformly, adding ethanol, and mixing to form an ink slurry; the FB resin powder is 14-180 mu m, and the particle size of the graphene powder is 30-60nm.
As a further embodiment of the invention, the insulating and heat-insulating protective layer in the step six comprises and is not limited to a protective layer material prepared by mixing mica powder, porcelain powder, quartz powder, FB resin powder and ethanol according to the formula proportion. One of the insulating and heat-insulating protective layers is prepared by mixing mica powder, porcelain powder, quartz powder, FB resin powder and ethanol according to a formula ratio, wherein the mica powder, the porcelain powder, the quartz powder and the FB resin powder are uniformly mixed and then added with ethanol to form ink slurry; the FB resin powder is 14-180 mu m, the particle size of the mica powder is smaller than 800 meshes, and the particle size of the quartz powder is larger than 600 meshes.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. A laser sintering film forming assembly line of graphene electric heating body is characterized in that: the novel thermal imaging flaw detection device comprises an assembly line conveying mechanism composed of a plurality of conveying devices (1) and electrode printing machines (2), a graphene heating body printing machine (3), a first laser (4), an insulating heat insulator printing machine (5) and a second laser (6) which are sequentially arranged on the assembly line conveying mechanism, wherein a substrate surface cleaning machine (7) is arranged on the conveying device (1) at the input end of the assembly line conveying mechanism, a dust remover (8) is arranged on the conveying device (1) between the substrate surface cleaning machine (7) and the electrode printing machine (2), a thermal imaging flaw detection device (9) is arranged on the conveying device (1) at the output end of the assembly line conveying mechanism, an electrifying test device (10) is arranged between the thermal imaging flaw detection device (9) and the second laser (6), a first dryer (11) is arranged between the electrode printing machine (2) and the graphene heating body printing machine (3), and a second dryer (12) is arranged between the graphene heating body printing machine (3) and the first laser (4), and a third dryer (13) is arranged between the insulating body printing machine (5) and the second laser (6).
2. The laser sintering film forming assembly line of a graphene electric heating body according to claim 1, wherein: the first laser (4) and the second laser (6) are driven by a numerical control system, a position monitor and a temperature measuring instrument are arranged on the first laser (4) and the second laser (6), and the numerical control system realizes linkage automatic control by the position monitor and the temperature measuring instrument.
3. The laser sintering film forming assembly line of a graphene electric heating body according to claim 1, wherein: the power-on testing device (10) comprises a first power-on testing end (101) and a second power-on testing end (102) along the transmission direction of the assembly line transmission mechanism, the first power-on testing end (101) and the second power-on testing end (102) are respectively arranged at the left side and the right side of the transmission equipment (1), the first power-on testing end (101) and the second power-on testing end (102) extend towards the inner side to form a plurality of conductive press roll shafts (103), the press roll shafts (103) are provided with power-on press rolls (104) capable of freely and flexibly rotating, and the power-on press rolls (104) can adaptively adjust the press contact tightness of the power-on press rolls (104) and the base according to the thickness of the base, so that reliable electric conduction connection between the power-on press rolls (104) and the base is ensured; the center of the outer sides of the first electrifying test end (101) and the second electrifying test end (102) is provided with an electrifying end (105), the electrifying ends (105) are respectively connected with an electrifying press roller (104) and a power supply through electric conductivity, and two sides of the electrifying ends (105) are provided with telescopic rods (106); the telescopic rod (106) is fixedly connected with the power-on testing device (10) through an insulator partition, so that the telescopic rod (106) is prevented from being electrified, and the distance between the first power-on testing end (101) and the second power-on testing end (102) is controlled and regulated through extension and shortening.
4. A laser sintering film-forming production line production method of a graphene electric heating body is characterized by comprising the following steps of: a laser sintering film forming assembly line comprising a graphene electric heating body according to any one of claims 1 to 3, the production method comprising the steps of:
firstly, placing a substrate on a conveying device (1), conveying the substrate to the lower part of a substrate surface cleaning machine (7) to clean the surface of the substrate, conveying the substrate to the lower part of a dust remover (8) through the conveying device (1) after cleaning, and cleaning dust on the surface of the substrate by the dust remover (8);
step two, when the substrate after the step one is conveyed below an electrode printing machine (2), printing metal conductive paste on the surface of the substrate through the electrode printing machine (2) to prepare a semi-finished product A printed with a metal electrode; the electrode printing machine (2) is provided with a printing screen A, and the shape and pattern of the electrode are determined and realized by the printing screen A;
step three, conveying the semi-finished product A after the step two to a first dryer (11), and heating and drying the semi-finished product A by the first dryer (11), wherein proper drying and shaping are mainly carried out on a metal electrode layer just printed on the surface;
step four, when the semi-finished product A after the step three is conveyed to the lower part of a graphene heating element printing machine (3), printing graphene electric heating element ink on the surface of the semi-finished product A through the graphene heating element printing machine (3) to obtain a semi-finished product B printed with a metal electrode layer and a graphene electric heating element layer; the printing screen B is arranged on the graphene heating body printing machine (3), and the shape and the pattern of the graphene electric heating body are determined and realized by the printing screen B;
step five, conveying the semi-finished product B subjected to the step four to a second dryer (12), and heating and drying the semi-finished product B by the second dryer (12), wherein the proper drying and shaping are mainly carried out on the graphene electric heating body ink layer just printed on the surface;
step six, when the semi-finished product B after the step five is conveyed below the first laser (4), performing first laser sintering on the semi-finished product B through the first laser (4), and sintering a metal electrode layer and a graphene electric heating body layer to form a film, so as to obtain a semi-finished product C;
step seven, when the semi-finished product C after the step six is conveyed below an insulating insulator printing machine (5), an insulating insulator ink is printed on a metal electrode layer and a graphene electric heating body layer on the surface of the semi-finished product C in a superposition manner through the insulating insulator printing machine (5), and a semi-finished product D printed with the metal electrode layer, the graphene electric heating body layer and the insulating protective layer is prepared; the printing screen C is arranged on the insulating insulator printing machine (5), and the shape and the pattern of the insulating and heat-insulating protective layer are determined and realized by the printing screen C;
step eight, conveying the semi-finished product D subjected to the step seven to a third dryer (13), and heating and drying the semi-finished product D by the third dryer (13), wherein proper heating, drying and shaping are mainly carried out on an insulating and heat-insulating protective layer just printed on the surface to obtain a semi-finished product E;
step nine, when the semi-finished product E after the step eight is conveyed to the lower part of the second laser (6), performing second laser sintering on the semi-finished product E through the second laser (6), and sintering and forming a film on the insulating and heat-insulating protective layer to obtain a finished product;
and step ten, conveying the finished product subjected to the step nine to a power-on test device (10) for power-on test, gradually heating the finished product during power-on test, detecting whether the heating position of the finished product is uniform or not through a heating imaging diagram when the finished product subjected to power-on heating passes through a thermal imaging flaw detection device (9), judging whether the process of the heating body reaches the standard or not, and conveying the product to the next working procedure for sorting.
5. The laser sintering film-forming production line method of the graphene electric heating body as set forth in claim 4, wherein the production line is characterized in that: and in the second step, the printing screen A is 180-250 meshes.
6. The laser sintering film-forming production line method of the graphene electric heating body as set forth in claim 4, wherein the production line is characterized in that: and the printing screen B in the third step and the printing screen C in the sixth step are 100-200 meshes.
7. The laser sintering film-forming production line method of the graphene electric heating body as set forth in claim 4, wherein the production line is characterized in that: the first dryer (11), the second dryer (12) and the third dryer (13) in the third step, the fifth step and the seventh step are infrared light wave or resistance heating type tunnel type electric dryers which are heated by infrared light waves or silicon-molybdenum rods, and the heating temperature can be flexibly set, adjusted and intelligently controlled between normal temperature and 400 ℃.
8. The laser sintering film-forming production line method of the graphene electric heating body as set forth in claim 4, wherein the production line is characterized in that: and in the fifth step and the eighth step, the laser sintering temperature of the first laser (4) and the second laser (6) is 500-1000 ℃.
9. The laser sintering film-forming production line method of the graphene electric heating body as set forth in claim 4, wherein the production line is characterized in that: the graphene electric heating body ink in the third step is prepared from graphene powder, far infrared emitting agent, FB resin powder and ethanol according to a formula proportion.
10. The laser sintering film-forming production line method of the graphene electric heating body as set forth in claim 4, wherein the production line is characterized in that: the insulating insulator ink in the step six is prepared from mica powder, porcelain powder, quartz powder, FB resin powder and ethanol according to the formula proportion.
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