CN117135782A - Graphene heating sheet and preparation method thereof - Google Patents
Graphene heating sheet and preparation method thereof Download PDFInfo
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- CN117135782A CN117135782A CN202311131184.0A CN202311131184A CN117135782A CN 117135782 A CN117135782 A CN 117135782A CN 202311131184 A CN202311131184 A CN 202311131184A CN 117135782 A CN117135782 A CN 117135782A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 169
- 238000010438 heat treatment Methods 0.000 title claims abstract description 107
- 238000002360 preparation method Methods 0.000 title claims abstract description 44
- 239000000758 substrate Substances 0.000 claims abstract description 91
- 239000003973 paint Substances 0.000 claims abstract description 45
- 238000000576 coating method Methods 0.000 claims abstract description 37
- 239000011248 coating agent Substances 0.000 claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 238000005485 electric heating Methods 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000004089 microcirculation Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Classifications
-
- 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
- H05B3/145—Carbon only, e.g. carbon black, graphite
-
- 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
- H05B3/02—Details
Abstract
The invention provides a graphene heating sheet and a preparation method thereof, and relates to the technical field of graphene heating sheets, wherein the preparation method comprises the following steps: providing a substrate; the method comprises the steps of obtaining graphene electrothermal paint, coating the graphene electrothermal paint on the upper surface of a substrate through a coating device, and drying the coated graphene electrothermal paint to obtain a graphene heating layer; and manufacturing an electrode on the upper surface of the graphene heating layer, and manufacturing the graphene heating sheet after the electrode is manufactured. According to the invention, the graphene heating layer is directly coated on the substrate by the graphene electrothermal coating, and the graphene heating layer and the substrate are not required to be connected through an adhesive, so that the structure of the graphene heating sheet is simplified, the preparation cost of the graphene heating sheet is saved, and meanwhile, the preparation process can be optimized, thereby improving the preparation efficiency of the graphene heating sheet.
Description
Technical Field
The invention relates to the technical field of graphene heating sheets, in particular to a graphene heating sheet and a preparation method thereof.
Background
The graphene heating sheet is a heating device which is formed by adding electrodes on a graphene film and applying voltage to the graphene film so as to generate heat, and has the characteristics of high heating speed and high electrothermal conversion efficiency. The graphene heating sheet can emit far infrared rays with the wavelength of 8-15 microns, and the absorption band of the human body on the infrared rays is mainly 3-15 microns and is just in the action band of the far infrared rays of the graphene. Meanwhile, the graphene heats and emits 8-15 microns far infrared waves, so that capillary vessels can be expanded, blood circulation is effectively promoted, and metabolism of a human body is facilitated.
The invention of the authorized bulletin number of CN107734722B relates to a graphene heating sheet, which comprises a flexible substrate, a graphene film and a nanoscale plating circuit, wherein the nanoscale plating circuit is generated by sputtering, a microstructure is introduced to the substrate in the manufacturing process of the nanoscale plating circuit, the microstructure is provided with a plurality of mutually-separated flat convex substrate planes, the flat convex substrate planes are partially stamped with a printed conductor plane, a substrate groove which extends back to the stamping die and is respectively provided with two substrate side walls is connected to the side surface of the convex substrate plane in the direction of entering the substrate, the corresponding two adjacent substrate side walls intersect at the bottom of the substrate groove, the substrate side walls are used as bearing surfaces of the printed conductor side walls, and the substrate side walls extend from the printed conductor side walls in the direction of the bottom of the substrate groove; the far infrared radiation emitted by the graphene heating sheet has no harm to human bodies, and has good medical care effects of improving body microcirculation systems and promoting metabolism.
However, in the preparation process of the graphene heating sheet, an adhesive film needs to be coated on the upper surface of the substrate, the preparation process is complex, and the preparation cost is high.
Disclosure of Invention
The invention provides a graphene heating sheet and a preparation method thereof, which are used for solving the technical problems of complex preparation process and high preparation cost of the existing graphene heating sheet.
In order to solve the technical problems, the invention discloses a preparation method of a graphene heating sheet, which comprises the following steps:
step 1: providing a substrate;
step 2: the method comprises the steps of obtaining graphene electrothermal paint, coating the graphene electrothermal paint on the upper surface of a substrate through a coating device, and drying the coated graphene electrothermal paint to obtain a graphene heating layer;
step 3: and manufacturing an electrode on the upper surface of the graphene heating layer, and manufacturing the graphene heating sheet after the electrode is manufactured.
Preferably, in step 2, the coating device comprises a workbench, the substrate is laid on the upper surface of the workbench, the mounting plate is vertically arranged on the workbench, the mounting plate is arranged at the upper end of the mounting plate, the bearing plate is perpendicular to the mounting plate, the lower surface of the bearing plate is provided with a first electric push rod, the output end of the first electric push rod is provided with a cover plate, the lower surface of the cover plate is provided with a second electric push rod, the output end of the second electric push rod is provided with an injection head, the output end of the injection head faces one side of the substrate, the input end of the injection head is communicated with one end of a conveying pipe, the conveying pipe adopts a telescopic pipe, one end of the conveying pipe, far away from the injection head, penetrates through the cover plate and is communicated with the output end of an injection molding machine, the outer wall of the conveying pipe is in sliding connection with the penetrating position of the cover plate, and the input end of the injection molding machine is used for throwing the graphene electrothermal paint.
Preferably, the left side of the workbench is provided with an unreeling mechanism, the unreeling mechanism comprises an unreeling roller, one end of a substrate is wound on the unreeling roller, the right side of the workbench is provided with a reeling mechanism, the reeling mechanism comprises a reeling roller, the reeling roller is driven by a driving motor, and one end of the substrate, which is far away from the unreeling roller, is wound on the reeling roller.
Preferably, conveying mechanisms are symmetrically arranged on the left side and the right side of the upper surface of the workbench, the conveying mechanisms comprise vertical plates, the vertical plates are vertically arranged on the upper surface of the workbench, transverse plates are arranged at the upper ends of the vertical plates, the transverse plates are perpendicular to the vertical plates, first guide pipes are arranged on the lower surfaces of the transverse plates, first springs are arranged in the first guide pipes, one ends of the first springs are connected with the inner walls of the first guide pipes, first sliding rods are arranged at the other ends of the first springs, the first sliding rods are in sliding connection with the inner walls of the first guide pipes, the lower ends of the first sliding rods extend to the outer parts of the first guide pipes and rotate to provide conveying rollers, and the bottoms of the conveying rollers are in butt joint with the upper surfaces of substrates.
Preferably, the apron lower surface sets up splash guard, splash guard includes two baffles, first curb plate and second curb plate, two baffle symmetry sets up in apron lower surface front and back both sides, baffle upper end and apron lower surface fixed connection, baffle perpendicular to apron, two baffles are parallel to each other, the distance between two baffle inner walls equals the width of substrate, first curb plate vertical setting is in apron left side lower surface, first curb plate height is less than baffle height, the vertical setting of second curb plate is at apron right side lower surface, the second curb plate is on a parallel with first curb plate, the difference in height of first curb plate and second curb plate equals the thickness of graphene heating layer, second curb plate is close to first curb plate one side and sets up the guide way, the guide way lower extreme runs through second curb plate bottom, the guide way sliding sets up the limiting plate, the limiting plate upper end is connected with second spring one end, the second spring other end is connected with the guide way upper end.
Preferably, an arc cover plate is arranged above the injection head, the section of the arc cover plate is arc-shaped, and the center of the arc cover plate is fixedly connected with the outer wall of the output end of the second electric push rod.
Preferably, set up pressing mechanism between two baffles, pressing mechanism includes two articulated seat, two articulated seat symmetry sets up in the baffle left and right sides, both ends respectively with the baffle inside wall sliding connection of front and back both sides around the articulated seat, articulated seat upper end sets up reset subassembly, reset subassembly is used for making articulated seat resume the normal position, articulated seat lower extreme is articulated with articulated slab one end and is connected, the articulated slab slope sets up, the articulated slab lower surface sets up the clamp plate, the clamp plate lower surface that is close to first curb plate sets up down the lug, the clamp plate that is close to the second curb plate is kept away from second curb plate one end and is set up the lug, go up lug and lower lug looks adaptation and can amalgamate each other, articulated slab one side is kept away from the clamp plate and is set up the spout, slide in the spout sets up the slider, the slider lateral wall sets up the third spring, the third spring other end is connected with spout one end, set up the articulated rod between slider and the articulated seat, articulated rod one end is articulated with the slider lateral wall, the articulated rod other end is close to upper end position articulated connection with the articulated seat.
Preferably, the lower surfaces of the left end and the right end of the arc-shaped cover plate are symmetrically provided with contact wheels which are rotationally connected with the arc-shaped cover plate.
Preferably, the reset component comprises a second guide pipe, the upper end of the second guide pipe is fixedly connected with the lower surface of the cover plate, a fourth spring is arranged in the second guide pipe, one end of the fourth spring is connected with the lower surface of the cover plate, the other end of the fourth spring is connected with one end of a second sliding rod, the second sliding rod is arranged in the second guide pipe in a sliding mode, and the lower end of the second sliding rod extends to the outside of the second guide pipe and is fixedly connected with the upper end of the hinging seat.
The invention also provides a graphene heating sheet, which is prepared by the preparation method of the graphene heating sheet, and comprises a substrate, wherein a graphene heating layer is arranged on the upper surface of the substrate, and an electrode is arranged on the surface of the graphene heating layer.
The technical scheme of the invention has the following advantages: the invention provides a graphene heating sheet and a preparation method thereof, and relates to the technical field of graphene heating sheets, wherein the preparation method comprises the following steps: providing a substrate; the method comprises the steps of obtaining graphene electrothermal paint, coating the graphene electrothermal paint on the upper surface of a substrate through a coating device, and drying the coated graphene electrothermal paint to obtain a graphene heating layer; and manufacturing an electrode on the upper surface of the graphene heating layer, and manufacturing the graphene heating sheet after the electrode is manufactured. According to the invention, the graphene heating layer is directly coated on the substrate by the graphene electrothermal coating, and the graphene heating layer and the substrate are not required to be connected through an adhesive, so that the structure of the graphene heating sheet is simplified, the preparation cost of the graphene heating sheet is saved, and meanwhile, the preparation process can be optimized, thereby improving the preparation efficiency of the graphene heating sheet.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and other advantages of the invention may be realized and attained by means of the instrumentalities particularly pointed out in the written description and the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of steps of a preparation method of a graphene heating sheet;
FIG. 2 is a schematic diagram of a graphene heat-generating sheet structure according to the present invention;
FIG. 3 is a schematic view showing the overall structure of the coating apparatus of the present invention;
FIG. 4 is an enlarged view of the invention at A in FIG. 3;
FIG. 5 is an enlarged view of the invention at B in FIG. 4;
FIG. 6 is a bottom view of the splash guard mechanism of the present invention;
FIG. 7 is a schematic view showing a pressure plate in a horizontal state in a coating apparatus according to the present invention;
FIG. 8 is an enlarged view of FIG. 7 at C in accordance with the present invention;
fig. 9 is an enlarged view of fig. 7 at D in accordance with the present invention.
In the figure: 1. a substrate; 2. a graphene heating layer; 3. a work table; 4. a mounting plate; 5. a carrying plate; 6. a first electric push rod; 7. a cover plate; 8. a second electric push rod; 9. an injection head; 10. a delivery tube; 11. a riser; 12. a cross plate; 13. a first conduit; 14. a first spring; 15. a first slide bar; 16. a conveying roller; 17. a baffle; 18. a first side plate; 19. a second side plate; 20. a guide groove; 21. a limiting plate; 22. a second spring; 23. an arc cover plate; 24. a hinge base; 25. a hinged plate; 26. a pressing plate; 27. a heating strip; 28. a lower bump; 29. a bump is arranged; 30. a chute; 31. a slide block; 32. a third spring; 33. a hinge rod; 34. a contact wheel; 35. a second conduit; 36. a fourth spring; 37. and a second slide bar.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In addition, the descriptions of the "first", "second", and the like in this application are for descriptive purposes only and are not intended to be in particular order or in a fair sense, nor are they intended to limit the invention solely for distinguishing between similar or equivalent arrangements or operations and not to be construed as indicating or implying any particular importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between the embodiments may be combined with each other, but it is necessary to base that a person skilled in the art can implement the combination of technical solutions, when the combination of technical solutions contradicts or cannot be implemented, should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present invention.
Example 1:
the embodiment of the invention provides a preparation method of a graphene heating sheet, which is shown in fig. 1 and 2 and comprises the following steps:
step 1: providing a substrate 1;
step 2: the method comprises the steps of obtaining graphene electrothermal paint, coating the graphene electrothermal paint on the upper surface of a substrate 1 through a coating device, and drying the coated graphene electrothermal paint to obtain a graphene heating layer 2;
step 3: and manufacturing an electrode on the upper surface of the graphene heating layer 2, and manufacturing the graphene heating sheet after the electrode is manufactured.
The working principle and the beneficial effects of the technical scheme are as follows: firstly, providing a substrate 1, wherein the surface of the substrate 1 is used for preparing a graphene heating layer 2, then obtaining a graphene electrothermal paint, wherein the graphene electrothermal paint adopts the existing graphene paint, has good electric conductivity and thermal conductivity, coats the graphene electrothermal paint on the upper surface of the substrate 1 through a coating device, then dries the graphene electrothermal paint, and dries the graphene electrothermal paint coated on the substrate 1 to obtain the graphene heating layer 2; finally, an electrode is manufactured on the upper surface of the graphene heating layer 2, the electrode can be manufactured in a printing or coating mode, a graphene heating sheet is manufactured after the electrode is manufactured, and the electrode is connected with an external circuit, so that power supply can be realized, and the graphene heating layer 2 heats. According to the invention, the graphene heating layer 2 is directly coated on the substrate 1 by the graphene electric heating coating, and the graphene heating layer 2 and the substrate 1 are not required to be connected through an adhesive, so that the structure of the graphene heating sheet is simplified, the preparation cost of the graphene heating sheet is saved, and meanwhile, the preparation process can be optimized, thereby improving the preparation efficiency of the graphene heating sheet.
Example 2
On the basis of the above embodiment 1, as shown in fig. 3-9, in step 2, the coating apparatus includes a workbench 3, a substrate 1 is laid on the upper surface of the workbench 3, a mounting plate 4 is vertically disposed on the workbench 3, a carrier plate 5 is disposed at the upper end of the mounting plate 4, the carrier plate 5 is perpendicular to the mounting plate 4, a first electric push rod 6 is disposed on the lower surface of the carrier plate 5, a cover plate 7 is disposed at the output end of the first electric push rod 6, a second electric push rod 8 is disposed on the lower surface of the cover plate 7, an injection head 9 is disposed at the output end of the second electric push rod 8, the output end of the injection head 9 faces one side of the substrate 1, the input end of the injection head 9 is communicated with one end of a conveying pipe 10, the conveying pipe 10 adopts a telescopic pipe, one end of the conveying pipe 10 far away from the injection head 9 penetrates through the cover plate 7 and is communicated with the output end of the injection molding machine, the outer wall of the conveying pipe 10 is slidably connected with the penetrating position of the cover plate 7, and the input end of the injection molding machine is used for throwing graphene electrothermal paint.
The working principle and the beneficial effects of the technical scheme are as follows: before preparing the graphene heating layer 2, firstly paving the obtained substrate 1 on the upper surface of the workbench 3, then starting the first electric push rod 6, enabling the first electric push rod 6 to drive the cover plate 7 to move downwards for a preset distance, enabling the preset distance to be set automatically according to user requirements, enabling the cover plate 7 to drive the second electric push rod 8 to move downwards, enabling the distance between the injection head 9 and the substrate 1 to be shortened, then throwing the graphene electric heating coating into the input end of the injection molding machine, enabling the graphene electric heating coating to be sprayed into the conveying pipe 10 through the output end of the injection molding machine, then conveying the graphene electric heating coating to the injection head 9 through the conveying pipe 10, finally spraying the graphene electric heating coating to the upper surface of the substrate 1, and then enabling the graphene electric heating coating to be heated and dried, so that the graphene heating layer 2 is prepared.
Example 3
On the basis of embodiment 2, an unreeling mechanism is arranged on the left side of the workbench 3, the unreeling mechanism comprises an unreeling roller, one end of the substrate 1 is wound on the unreeling roller, a reeling mechanism is arranged on the right side of the workbench 3, the reeling mechanism comprises a reeling roller, the reeling roller is driven by a driving motor, and one end of the substrate 1, which is far away from the unreeling roller, is wound on the reeling roller.
The working principle and the beneficial effects of the technical scheme are as follows: one end of the substrate 1 is wound on the unreeling roller, the other end of the substrate 1 is wound on the wind-up roller, the wind-up roller can drive the wind-up roller to intermittently rotate through a driving motor, so that the substrate 1 is intermittently pulled, when the driving motor stops driving, the coating device can uniformly coat the graphene electrothermal coating on the upper surface of the substrate 1, the coating device reserves time for coating, and after the graphene electrothermal coating coated once is dried, the driving motor is started again, so that continuous automatic preparation of the graphene heating layer 2 is realized.
Example 4
On the basis of embodiment 2 or 3, as shown in fig. 3, conveying mechanisms are symmetrically arranged on the left side and the right side of the upper surface of the workbench 3, each conveying mechanism comprises a vertical plate 11, each vertical plate 11 is vertically arranged on the upper surface of the workbench 3, a transverse plate 12 is arranged at the upper end of each vertical plate 11, each transverse plate 12 is perpendicular to each vertical plate 11, a first guide pipe 13 is arranged on the lower surface of each transverse plate 12, a first spring 14 is arranged in each first guide pipe 13, one end of each first spring 14 is connected with the inner wall of each first guide pipe 13, a first sliding rod 15 is arranged at the other end of each first spring 14, each first sliding rod 15 is slidably connected with the inner wall of each first guide pipe 13, each first sliding rod 15 extends to the outside of each first guide pipe 13 and is rotatably provided with a conveying roller 16, and the bottom surface of each conveying roller 16 is in butt joint with the upper surface of the substrate 1.
The working principle and the beneficial effects of the technical scheme are as follows: in order to improve the sliding stability of the substrate 1 on the upper surface of the workbench 3, conveying mechanisms are arranged on the left side and the right side of the upper surface of the workbench 3, when the substrate 1 slides along the upper surface of the workbench 3, the bottom surface of the conveying roller 16 on the left side can be always abutted with the upper surface of the substrate 1 under the action of the first spring 14, the bottom surface of the conveying roller 16 on the right side can be abutted with the upper surface of the newly prepared graphene heating layer 2 under the action of the first spring 14, the problem that the substrate 1 is pulled away from the upper surface of the workbench 3 along with the increase of the thickness of the substrate 1 on the winding roller can be avoided by arranging the conveying mechanisms, so that the graphene electrothermal coating can be uniformly coated on the upper surface of the substrate 1, and the graphene heating layer 2 can be further compacted through the abutting of the conveying roller 16 and the graphene heating layer 2, and the connection strength of the graphene heating layer 2 and the substrate 1 is improved.
Example 5
On the basis of any one of embodiments 2-4, as shown in fig. 3-9, a splash-proof mechanism is arranged on the lower surface of the cover plate 7, the splash-proof mechanism comprises two baffles 17, a first side plate 18 and a second side plate 19, the two baffles 17 are symmetrically arranged on the front side and the rear side of the lower surface of the cover plate 7, the upper ends of the baffles 17 are fixedly connected with the lower surface of the cover plate 7, the baffles 17 are perpendicular to the cover plate 7, the two baffles 17 are parallel to each other, the distance between the inner walls of the two baffles 17 is equal to the width of the substrate 1, the first side plate 18 is vertically arranged on the lower surface of the left side of the cover plate 7, the first side plate 18 is smaller than the height of the baffles 17, the second side plate 19 is vertically arranged on the lower surface of the right side of the cover plate 7, the second side plate 19 is parallel to the first side plate 18, the difference in height between the first side plate 18 and the second side plate 19 is equal to the thickness of the graphene heating layer 2, a guide groove 20 is arranged on one side of the second side plate 19, the lower end of the guide groove 20 penetrates the bottom of the second side plate 19, a limit plate 21 is slidably arranged in the guide groove 20, the upper end of the limit plate 21 is connected with the other end of the second spring 22, and the upper end of the guide groove 20 is connected with the upper end of the second spring 22.
The working principle and the beneficial effects of the technical scheme are as follows: in order to avoid the problem that the injection head 9 sputters when coating the graphene electrothermal paint on the substrate 1, a splash-proof mechanism is arranged on the lower surface of the cover plate 7, when the first electric push rod 6 drives the cover plate 7 to move downwards, the two baffles 17, the first side plate 18 and the second side plate 19 move downwards along with the cover plate 7, the two baffles 17 move to the front side and the rear side of the substrate 1, the front side and the rear side of the substrate 1 are shielded, sealing of the front side and the rear side is realized, the first side plate 18 and the second side plate 19 are attached to the upper surface of the substrate 1, thereby shielding the left side space, the graphene electrothermal paint is prevented from being sputtered to the left side of the cover plate 7 in the coating process, when the surface of the substrate 1 is not provided with the graphene electrothermal paint layer 2, the lower end of the limit plate 21 is abutted to the upper surface of the substrate 1, the limit plate 21 can shield the right side space, the graphene electrothermal paint is prevented from being sputtered to the right side of the cover plate 7, after the preparation of the graphene electrothermal paint layer 2 is completed, the driving motor drives the winding roller to rotate, the graphene electrothermal paint layer 2 moves towards the winding roller until the graphene layer 2 moves to the winding roller, the graphene layer 2 is pushed to the front side, the end of the graphene layer 2 is abutted to the upper surface of the substrate 1, the upper surface of the limit plate 21 is pushed by the limit plate 21, the upper end of the graphene electrothermal paint is abutted to the upper end of the graphene electrothermal paint layer is pressed against the upper surface of the substrate 1, and the upper end of the limit plate 21 is pressed by the limit plate 21, and the limit plate 21 is abutted to the upper end of the upper surface of the limit plate 2, and the limit plate is pressed by the limit plate 21 is pressed down, and the limit plate 21 is pressed down to be made to rotate, and the limit plate 21 is abutted to rotate down, and the upper end is pressed down is made to rotate, and the limit is respectively, and the upper end is made to rotate and is made and is pressed down and is made and move and is made and move and rotate and is The space above the substrate 1 can be sealed by the first side plate 18 and the second side plate 19, when the injection head 9 coats the graphene electrothermal paint on the upper surface of the substrate 1, the sputtered graphene electrothermal paint is blocked by the cover plate 7, the two baffle plates 17, the first side plate 18 and the second side plate 19, so that waste of the graphene electrothermal paint can be reduced, cost is saved, on the other hand, the quantitative graphene electrothermal paint sprayed out by the injection head 9 once can be fully utilized, the surface of the last section of graphene heating layer 2 can not be sputtered, the graphene electrothermal paint is uniformly coated on the upper surface of the substrate 1, the preparation quality of the graphene heating layer 2 is improved, and a splash-proof mechanism can adapt to different use scenes by arranging the limiting plate 21, so that a good shielding effect can be achieved no matter a single section of graphene heating layer 2 is manufactured, or a long section of graphene heating layer 2 is continuously prepared, and the application range is enlarged.
Example 6
On the basis of the embodiment 5, as shown in fig. 8, an arc cover plate 23 is arranged above the injection head 9, the section of the arc cover plate 23 is arc-shaped, and the center of the arc cover plate 23 is fixedly connected with the outer wall of the output end of the second electric push rod 8.
The working principle and the beneficial effects of the technical scheme are as follows: the arc cover plate 23 can enable the injection head 9 to spray the graphene electrothermal paint more intensively, further prevent the graphene electrothermal paint from splashing, and reduce the waste of the graphene electrothermal paint.
Example 7
On the basis of embodiment 6, as shown in fig. 3-9, a pressing mechanism is disposed between two baffles 17, the pressing mechanism includes two hinge bases 24, the two hinge bases 24 are symmetrically disposed on the left side and the right side of the baffles 17, the front end and the rear end of each hinge base 24 are respectively slidably connected with inner side walls of the baffles 17 on the front side and the rear side, a reset component is disposed at the upper end of each hinge base 24, the reset component is used for enabling each hinge base 24 to restore to the original position, the lower end of each hinge base 24 is hinged with one end of a hinge plate 25, the hinge plates 25 are obliquely disposed, a pressing plate 26 is disposed on the lower surface of each hinge plate 25, a plurality of heating strips 27 are disposed on the lower surface of each pressing plate 26, an upper bump 29 is disposed on one end, close to the first side plate 18, of each pressing plate 26, close to the second side plate 19, of each upper bump 29 is matched with each lower bump 28, a sliding groove 30 is disposed on one side, each hinge plate 25 is far away from each hinge plate 26, a sliding groove 31 is slidably disposed on each sliding groove 31, each sliding groove 31 is disposed on one side, each sliding groove 32 is connected with each sliding groove 30, a sliding groove 33 is disposed between each sliding groove 31 and each hinge base 24, a sliding rod 33 is disposed, each sliding rod 33 is connected with each hinge plate 33, and each hinge plate is hinged with each hinge base is connected.
The working principle and the beneficial effects of the technical scheme are as follows: after the surface of the substrate 1 is coated with a certain amount of graphene electrothermal paint, a second electric push rod 8 is started, the second electric push rod 8 pushes out to drive an arc cover plate 23 to move downwards, two ends of the arc cover plate 23 are contacted with the upper surfaces of pressing plates 26 at two sides and push the pressing plates 26 to swing downwards, a sliding block 31 slides in a sliding groove 30, a third spring 32 stretches, an injection head 9 is arranged at the center of the arc cover plate 23, so that the pressing plates 26 cannot interfere the position of the pressing plates 26 in the swinging process, the pressing plates 26 gradually move to a horizontal state under the downward pressing of the arc cover plate 23, at the moment, the lower surface of an upper convex block 29 is attached and sealed with the upper surface of a lower convex block 28, one end, away from the arc cover plate 23, of the pressing plates 26 is abutted with the first side plate 18, the pressing plates 26 at the right side cannot swing continuously, the pressing plates 26 at the lower convex blocks 29 and the lower convex blocks 28 cannot swing continuously, at this time, the second electric push rod 8 continues to move downwards, the arc cover plate 23 drives the two pressing plates 26 to slide downwards horizontally, the pressing plates 26 drive the hinging seat 24 to slide downwards through the hinging plates 25, the elasticity of the reset component is increased, when the distance from the lower surface of the pressing plates 26 to the substrate 1 is the same as the preset thickness of the graphene electrothermal paint, the second electric push rod 8 stops moving, at this time, the pressing plates 26 can press the graphene electrothermal paint coated on the upper surface of the substrate 1, so that the graphene electrothermal paint is uniformly paved on the upper surface of the substrate 1 below the cover plate 7, then the heating strips 27 are started to heat the graphene electrothermal paint, so that the graphene electrothermal paint is solidified to prepare the graphene heating layer 2, the preparation thickness of the graphene heating layer 2 can be kept consistent, the preparation quality is improved, the height of the pressing plates 26 can be changed along with the height of the graphene heating layer 2, the graphene heating layer 2 with various different thicknesses is convenient to prepare.
Example 8
On the basis of embodiment 7, as shown in fig. 8, contact wheels 34 are symmetrically arranged on the lower surfaces of the left and right ends of the arc-shaped cover plate 23, and the contact wheels 34 are rotatably connected with the arc-shaped cover plate 23.
The working principle and the beneficial effects of the technical scheme are as follows: after the injection head 9 is coated for a single time, the second electric push rod 8 pushes the arc cover plate 23 to move downwards, and the contact wheel 34 arranged on the lower surface of the arc cover plate 23 can be in contact with the upper surface of the pressing plate 26, so that the pressing plate 26 is pressed downwards, the two pressing plates 26 are mutually spliced, and the contact wheel 34 can roll on the upper surface of the pressing plate 26, so that the abrasion of the arc cover plate 23 and the abrasion of the pressing plate 26 are reduced, and the service life is prolonged.
Example 9
On the basis of embodiment 7 or 8, as shown in fig. 4, the reset assembly comprises a second conduit 35, the upper end of the second conduit 35 is fixedly connected with the lower surface of the cover plate 7, a fourth spring 36 is arranged in the second conduit 35, one end of the fourth spring 36 is connected with the lower surface of the cover plate 7, the other end of the fourth spring 36 is connected with one end of a second sliding rod 37, the second sliding rod 37 is slidably arranged in the second conduit 35, and the lower end of the second sliding rod 37 extends to the outside of the second conduit 35 and is fixedly connected with the upper end of the hinge seat 24.
The working principle and the beneficial effects of the technical scheme are as follows: after the two pressing plates 26 are mutually spliced, the second electric push rod 8 continues to push downwards, so that the pressing plates 26 slide downwards, one end of each pressing plate 26 drives the corresponding hinge seat 24 to slide downwards through the hinge plate 25, the hinge seat 24 drives the corresponding second sliding rod 37 to slide downwards along the inner wall of the corresponding second guide pipe 35, the fourth spring 36 stretches until the upper surface of each pressing plate 26 is in contact with the coated graphene electric heating coating, then the heating strip 27 starts to heat, the graphene electric heating coating is solidified to prepare the graphene heating layer 2, the first electric push rod 6 is controlled to retract firstly, under the action of the pressing plates 26, the baffle 17, the first side plate 18 and the second side plate 19 do not drive the substrate 1 and the graphene heating layer 2 which are just prepared to move upwards, then the second electric push rod 8 is controlled to retract, under the action of the fourth spring 36, the two pressing plates 26 are away from the graphene heating layer 2 firstly, then the corresponding third spring 32 returns to the inclined state again, the two spliced pressing plates 26 are separated, the injection head 9 can coat the graphene electric heating coating on the upper surface of the substrate 1 through a gap between the two pressing plates 26, and the hinge seat can restore the original position due to the arrangement of the hinge seat 24.
The invention also provides a graphene heating sheet, which is prepared by adopting the preparation method of the graphene heating sheet, and as shown in fig. 2, the graphene heating sheet comprises a substrate 1, wherein a graphene heating layer 2 is arranged on the upper surface of the substrate 1, and an electrode is arranged on the surface of the graphene heating layer 2.
In the graphene heating sheet, the graphene heating layer 2 is directly arranged on the upper surface of the substrate 1, connection through an adhesive is not needed, cost is saved, and meanwhile, the preparation process can be reduced, so that the preparation efficiency of the graphene heating sheet is improved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The preparation method of the graphene heating sheet is characterized by comprising the following steps of:
step 1: providing a substrate (1);
step 2: the method comprises the steps of obtaining graphene electrothermal paint, coating the graphene electrothermal paint on the upper surface of a substrate (1) through a coating device, and drying the coated graphene electrothermal paint to obtain a graphene heating layer (2);
step 3: and manufacturing an electrode on the upper surface of the graphene heating layer (2), and manufacturing the graphene heating sheet after the electrode is manufactured.
2. The preparation method of the graphene heating sheet according to claim 1, wherein in the step 2, the coating device comprises a workbench (3), the substrate (1) is paved on the upper surface of the workbench (3), a mounting plate (4) is vertically arranged on the workbench (3), a bearing plate (5) is arranged at the upper end of the mounting plate (4), the bearing plate (5) is perpendicular to the mounting plate (4), a first electric push rod (6) is arranged on the lower surface of the bearing plate (5), a cover plate (7) is arranged at the output end of the first electric push rod (6), a second electric push rod (8) is arranged on the lower surface of the cover plate (7), an injection head (9) is arranged at the output end of the second electric push rod (8), the output end of the injection head (9) faces one side of the substrate (1), the input end of the injection head (9) is communicated with one end of a conveying pipe (10), the conveying pipe (10) adopts a telescopic pipe, one end of the conveying pipe (10) is far away from the injection head (9) and penetrates through the cover plate (7) and is communicated with the output end of an injection molding machine, the outer wall of the conveying pipe (10) is in sliding connection with the penetrating position of the cover plate (7), and the lower surface is used for feeding graphene electric heating coating.
3. The preparation method of the graphene heating sheet according to claim 2, wherein an unreeling mechanism is arranged on the left side of the workbench (3), the unreeling mechanism comprises an unreeling roller, one end of the substrate (1) is wound on the unreeling roller, a reeling mechanism is arranged on the right side of the workbench (3), the reeling mechanism comprises a reeling roller, the reeling roller is driven by a driving motor, and one end, far away from the unreeling roller, of the substrate (1) is wound on the reeling roller.
4. The preparation method of the graphene heating sheet according to claim 2, wherein conveying mechanisms are symmetrically arranged on the left side and the right side of the upper surface of the workbench (3), the conveying mechanisms comprise vertical plates (11), the vertical plates (11) are vertically arranged on the upper surface of the workbench (3), transverse plates (12) are arranged at the upper ends of the vertical plates (11), the transverse plates (12) are perpendicular to the vertical plates (11), first guide pipes (13) are arranged on the lower surfaces of the transverse plates (12), first springs (14) are arranged in the first guide pipes (13), one ends of the first springs (14) are connected with the inner walls of the first guide pipes (13), first sliding rods (15) are arranged at the other ends of the first springs (14) and are connected with the inner walls of the first guide pipes (13) in a sliding mode, the lower ends of the first sliding rods (15) extend to the outer portions of the first guide pipes (13) and are rotated to be provided with conveying rollers (16), and the bottom surfaces of the conveying rollers (16) are in butt joint with the upper surfaces of the substrates (1).
5. The preparation method of the graphene heating sheet according to claim 2, wherein a splash-proof mechanism is arranged on the lower surface of the cover plate (7), the splash-proof mechanism comprises two baffles (17), a first side plate (18) and a second side plate (19), the two baffles (17) are symmetrically arranged on the front side and the rear side of the lower surface of the cover plate (7), the upper ends of the baffles (17) are fixedly connected with the lower surface of the cover plate (7), the baffles (17) are perpendicular to the cover plate (7), the two baffles (17) are parallel to each other, the distance between the inner walls of the two baffles (17) is equal to the width of the substrate (1), a first side plate (18) is vertically arranged on the lower surface of the left side of the cover plate (7), the first side plate (18) is smaller than the baffle (17), a second side plate (19) is vertically arranged on the lower surface of the right side of the cover plate (7), the second side plate (19) is parallel to the first side plate (18), the height difference between the first side plate (18) and the second side plate (19) is equal to the thickness of the graphene heating layer (2), the second side plate (19) is close to the first side plate (18), a guide groove (20) is arranged on the lower end (20) of the second side plate (20) and the guide groove (20) is arranged at the upper end (20) and the lower end (20) is connected with the guide groove (21), the other end of the second spring (22) is connected with the upper end of the guide groove (20).
6. The preparation method of the graphene heating sheet according to claim 5, wherein an arc-shaped cover plate (23) is arranged above the injection head (9), the section of the arc-shaped cover plate (23) is arc-shaped, and the center of the arc-shaped cover plate (23) is fixedly connected with the outer wall of the output end of the second electric push rod (8).
7. The preparation method of the graphene heating sheet according to claim 6, wherein a pressing mechanism is arranged between two baffles (17), the pressing mechanism comprises two hinge seats (24), the two hinge seats (24) are symmetrically arranged on the left side and the right side of the baffles (17), the front end and the rear end of each hinge seat (24) are respectively in sliding connection with the inner side walls of the baffles (17) on the front side and the rear side, a reset component is arranged at the upper end of each hinge seat (24), the reset component is used for enabling the hinge seat (24) to restore to the original position, the lower end of each hinge seat (24) is hinged with one end of a hinge plate (25), the hinge plates (25) are obliquely arranged, a pressing plate (26) is arranged on the lower surface of each hinge plate (25), the lower surface of the pressing plate (26) is provided with a plurality of heating strips (27), one end, far away from the first side plate (18), of the pressing plate (26) close to the first side plate (18) is provided with a lower protruding block (28), one end, far away from the second side plate (19), of the pressing plate (26) close to the second side plate (19) is provided with an upper protruding block (29), the upper protruding block (29) is matched with the lower protruding block (28) and can be mutually spliced, one side, far away from the pressing plate (26), of the hinge plate (25) is provided with a sliding groove (30), a sliding block (31) is arranged in the sliding groove (30), the side wall of the sliding block (31) is provided with a third spring (32), and the other end of the third spring (32) is connected with one end of the sliding groove (30), a hinge rod (33) is arranged between the sliding block (31) and the hinge seat (24), one end of the hinge rod (33) is hinged with the side wall of the sliding block (31), and the other end of the hinge rod (33) is hinged with the position, close to the upper end, of the hinge seat (24).
8. The preparation method of the graphene heating sheet according to claim 7, wherein contact wheels (34) are symmetrically arranged on the lower surfaces of the left end and the right end of the arc-shaped cover plate (23), and the contact wheels (34) are rotationally connected with the arc-shaped cover plate (23).
9. The preparation method of the graphene heating sheet according to claim 7, wherein the reset component comprises a second guide pipe (35), the upper end of the second guide pipe (35) is fixedly connected with the lower surface of the cover plate (7), a fourth spring (36) is arranged in the second guide pipe (35), one end of the fourth spring (36) is connected with the lower surface of the cover plate (7), the other end of the fourth spring (36) is connected with one end of a second sliding rod (37), the second sliding rod (37) is arranged in the second guide pipe (35) in a sliding mode, and the lower end of the second sliding rod (37) extends to the outside of the second guide pipe (35) and is fixedly connected with the upper end of the hinging seat (24).
10. A graphene heating sheet prepared by a preparation method of a graphene heating sheet according to any one of claims 1 to 9, which is characterized by comprising a substrate (1), wherein a graphene heating layer (2) is arranged on the upper surface of the substrate (1), and an electrode is arranged on the surface of the graphene heating layer (2).
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