CN113399194A - Electrothermal film coating equipment and process using fiber fabric as base material and electrothermal film - Google Patents
Electrothermal film coating equipment and process using fiber fabric as base material and electrothermal film Download PDFInfo
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- CN113399194A CN113399194A CN202110808288.5A CN202110808288A CN113399194A CN 113399194 A CN113399194 A CN 113399194A CN 202110808288 A CN202110808288 A CN 202110808288A CN 113399194 A CN113399194 A CN 113399194A
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- 239000004744 fabric Substances 0.000 title claims abstract description 162
- 239000000835 fiber Substances 0.000 title claims abstract description 120
- 239000000463 material Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 23
- 239000007888 film coating Substances 0.000 title claims abstract description 17
- 238000009501 film coating Methods 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 137
- 239000011248 coating agent Substances 0.000 claims abstract description 120
- 238000004804 winding Methods 0.000 claims abstract description 100
- 238000001035 drying Methods 0.000 claims abstract description 90
- 238000009434 installation Methods 0.000 claims abstract description 77
- 239000000758 substrate Substances 0.000 claims abstract description 57
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 239000004753 textile Substances 0.000 claims abstract description 7
- 238000010998 test method Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 26
- 239000002002 slurry Substances 0.000 claims description 23
- 239000006255 coating slurry Substances 0.000 claims description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 19
- 238000011084 recovery Methods 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 17
- 238000005485 electric heating Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
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- 239000000523 sample Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 12
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- 230000008859 change Effects 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 239000007822 coupling agent Substances 0.000 claims description 6
- 239000002952 polymeric resin Substances 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000000080 wetting agent Substances 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 2
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- 229910021389 graphene Inorganic materials 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/02—Supporting web roll
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/10—Arrangements for effecting positive rotation of web roll
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/208—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based
- D03D15/217—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based natural from plants, e.g. cotton
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
- D03D15/25—Metal
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
- D03D15/267—Glass
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
- D03D15/275—Carbon fibres
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/533—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads antistatic; electrically conductive
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/60—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the warp or weft elements other than yarns or threads
- D03D15/67—Metal wires
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Botany (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention discloses an electrothermal film coating process taking fiber fabric as a base material, which comprises the following steps: A. preparation of the fibrous textile substrate before coating: reliably connecting the leading cloth led out from the front opening of the oven with the fiber fabric base material from the coating installation groove; B. performing a coating process; C. and (3) drying: dividing the interior of the drying box into a front section, a middle section and a rear section which are different in temperature, wherein the temperature of the middle section is higher than that of the rear section; D. carrying out an electrical property online test procedure; E. and (5) carrying out a winding process. The electrothermal film prepared by the electrothermal film coating process can greatly improve the effective heating area of the electrothermal film, reduce the working temperature of the electrothermal film under the same power density, improve the thermal efficiency, prolong the service life, enhance the electrical contact performance between the current-carrying electrode of the electrothermal film and an electrothermal material, and greatly improve the safety performance of the electrothermal film.
Description
Technical Field
The invention relates to the technical field of flexible planar electric heating materials, in particular to electric heating film coating equipment and process taking fiber fabrics as base materials and an electric heating film.
Background
The electrothermal film is a flexible film which can generate heat after being electrified, and is a planar heating element consisting of an electric insulating material and a heating resistance material packaged in the electric insulating material.
The existing electrothermal film is generally realized by coating conductive ink on a polyester film (PET) substrate in a printing mode to serve as an electrically connected electrode, or by adopting a conductive silver paste printing mode, or combining the conductive ink layer with a copper foil tape in an adhesive mode, and finally covering a layer of polyester film.
For technical reasons, the existing electrothermal film has some disadvantages:
firstly, when the conductive ink is coated, blank areas are required to be regularly reserved on a substrate to ensure that a polyester film insulating layer and the conductive ink bearing substrate can be reliably bonded, and a film electrode is firmly attached to a conductive ink heating layer; therefore, the effective heating area of the existing electrothermal film is not 100 percent, generally 50 to 80 percent, the working temperature of the existing electrothermal film is relatively high, and the electrothermal conversion rate is inevitably lower than a theoretical value;
secondly, the bonding strength of the existing electrothermal film electrode and the conductive ink layer mainly depends on the bonding performance of the conductive silver paste or the conductive adhesive and the bonding strength of the polyester film insulating layer and the conductive ink bearing substrate; the contact mode enables the contact surface of the electrode and the conductive ink to have relatively large contact resistance; in practical applications, if local overheating occurs, a weak area with relatively large contact resistance inevitably tends to deteriorate due to continuous heat generation, and in severe cases, a contact failure or a safety accident such as ignition may occur.
Thirdly, the drying system of the existing coating machine generally adopts hot air drying, and the drying mode has the defects of higher energy consumption and difficulty in realizing more accurate temperature control.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides electrothermal film coating equipment taking fiber fabric as a base material, which comprises:
the unwinding device comprises an unwinding frame body, and the unwinding frame body is provided with an unwinding mounting groove; the unreeling installation groove is used for placing a rolled fiber fabric substrate, and an unreeling guide structure is arranged in the unreeling installation groove; the unreeling guide structure can change the fiber fabric base material from a coiled shape to a flat stretched shape, and lead the flat stretched fiber fabric base material out of the unreeling installation groove;
the coating device comprises a coating frame body, the coating frame body is positioned on one side of the unreeling frame body, and the coating frame body is provided with a coating installation groove; a coating leading-in structure and a coating mechanism are arranged in the coating installation groove; the fiber fabric base material led out from the unreeling installation groove can be led into the coating installation groove through the coating leading-in structure, and the fiber fabric base material is coated through the coating mechanism;
the drying device comprises a drying frame body, the drying frame body is positioned at the rear side of the coating frame body, a horizontal supporting plate is arranged on the upper side of the drying frame body, a drying box is arranged on the supporting plate, the front end of the drying box is provided with a front opening of an oven, the front opening of the oven corresponds to an outlet of the coating installation groove, and the rear end of the drying box is provided with a rear opening of the oven; an oven guide roller is arranged inside the drying box;
the winding device is positioned at the rear side of the drying rack body and comprises a winding rack body and an unfolding rack body; the winding frame body is provided with a winding installation groove, the winding installation groove is used for placing rolled cloth guiding, and a winding guide mechanism is arranged in the winding installation groove; the winding guide mechanism can change the drawing cloth from a roll shape to a flat stretching shape and guide the flat stretching drawing cloth out of the winding mounting groove; the unfolding guide roller can guide the guiding cloth guided out from the winding installation groove into the drying box from the rear opening of the drying box;
the cloth guiding device comprises a drying box, a cloth guiding roller and a fiber fabric base material, wherein the cloth guiding roller can move to an opening in front of the drying box through the drying box, and is connected with the fiber fabric base material.
As optimization, the unreeling guide structure comprises an unreeling shaft, an unreeling traction roller and a first guide assembly which are sequentially arranged in the unreeling installation groove from back to front; the two ends of the unreeling traction roller are rotatably connected with the side wall of the unreeling mounting groove, and an unreeling guide roller is arranged above the unreeling traction roller;
the fiber fabric base material is wound and rolled on a unwinding shaft; the fixed end of the fiber fabric substrate is connected with the unreeling shaft, and the movable end of the fiber fabric substrate firstly passes through a gap between the unreeling guide roller and the unreeling traction roller, then passes through the first guide assembly and finally penetrates out of the front end of the unreeling mounting groove; wherein, the upper and lower both sides of the fiber fabric substrate are respectively contacted with the unreeling guide roller and the unreeling traction roller.
Preferably, the coating leading-in structure comprises a coating transition roller and a coating guide roller which are sequentially arranged in the coating installation groove from back to front; the two ends of the coating transition roller are rotatably connected with the side wall of the coating installation groove;
coating mechanism includes the thick liquids storage tank, the top of thick liquids storage tank is provided with the backing roll, and the top of backing roll is provided with the comma scraper, the both ends of comma scraper rotate with the lateral wall of coating mounting groove to be connected, and the rear side of backing roll is provided with oozes thick liquid and retrieves the scraper, ooze thick liquid and retrieve the scraper and rotate with the coating mounting groove through retrieving scraper installation axle and be connected, the below of thick liquids storage tank is provided with oozes thick liquid and retrieves and connect the liquid dish.
As optimization, a comma scraper adjusting structure is arranged on the side wall of the coating installation groove, and comprises a first sliding groove arranged on the side wall of the coating installation groove, an adjusting bracket arranged on the upper side of the first sliding groove, an adjusting cylinder arranged on the adjusting bracket and a first sliding block connected with a telescopic shaft of the adjusting cylinder; the first sliding block is fixedly connected with the end part of the comma scraper, and the first sliding block can move on the first sliding groove along with the telescopic shaft of the adjusting cylinder.
Preferably, the winding guide mechanism comprises a winding shaft, an adjusting roller, a winding transition roller, a second guide assembly and a cooling roller which are sequentially arranged in the winding mounting groove from front to back; two ends of the winding transition roller are rotatably connected with the side wall of the winding mounting groove; the lower side of the cooling roller is provided with a winding traction roller, and two ends of the winding traction roller are rotatably connected with the side wall of the winding mounting groove;
wherein the cloth guiding winding roll is arranged on the winding shaft; the fixed end of the leading cloth is connected with the winding shaft, and the movable end of the leading cloth firstly passes through the adjusting roller, then passes through the winding transition roller, then passes through the second guide assembly, then passes through the gap between the cooling roller and the winding traction roller, and finally passes out of the rear end of the winding installation groove and enters the unfolding frame body.
As optimization, an adjusting roller control structure is arranged on the side wall of the winding mounting groove, and comprises a second sliding groove formed in the side wall of the winding mounting groove, a second sliding block movably arranged in the second sliding groove, and an adjusting bolt connected with the upper end of the second sliding block; the second sliding block is fixedly connected with the end part of the adjusting roller, and the upper end of the adjusting bolt penetrates through the upper side of the second sliding groove and is connected with a spiral cover.
The application also provides an electrothermal film coating process taking the fiber fabric as a base material, which comprises the following steps:
A. preparation of the fibrous textile substrate before coating: placing a fiber fabric substrate in an unreeling installation groove, and then drawing the fiber fabric substrate into a coating installation groove; placing a guide cloth in a winding installation groove, then drawing the guide cloth to pass through a stretching frame body, then enabling the guide cloth to enter a drying box, flatly spreading the guide cloth through a stretching guide roller on the stretching frame body and an oven guide roller in the drying box, and then leading out the guide cloth from a front opening of an oven; reliably connecting the leading cloth led out from the front opening of the oven with the fiber fabric base material from the coating installation groove; starting a drying box to dry and heat the cloth guiding and the fiber fabric base material;
B. performing a coating process: adjusting the gap between the comma scraper and the fiber fabric base material by using a feeler gauge until the gap along the edge of the comma scraper is consistent, and then fixing the comma scraper; quantitatively feeding the coating slurry into a slurry storage tank; the slurry seepage recovery scraper is rotated until the slurry seepage recovery scraper is tightly attached to the supporting roller by rotating the installation shaft of the recovery scraper, so that the coating slurry adhered to the supporting roller can be completely recovered to the slurry seepage recovery liquid receiving disc;
C. and (3) drying: starting the drying box, and dividing the interior of the drying box into three regions with different temperatures, namely a front section, a middle section and a rear section, wherein the temperature of the middle section is higher than that of the rear section and higher than that of the front section; driving a drying oven guide roller to enable the coated fiber fabric substrate to enter a drying oven;
D. carrying out an electrical property online test procedure: starting an electrothermal film online testing device arranged at the rear side of a winding installation groove, wherein the electrothermal film online testing device comprises 1-3 sets of resistance testing probes, probe fixing mechanisms with corresponding quantity and a multichannel resistance recorder, setting a data sampling interval and a data upper and lower limit alarm range through the resistance recorder, and then adjusting the probe fixing mechanisms to enable the resistance testing probes to be tightly attached to the coating surface of a fiber fabric substrate;
E. carrying out a winding process: and closing the drying box, starting a winding traction roller to drive the cloth to drive the coated fiber fabric substrate to be recovered after the electric heating film coiled material is cooled.
Preferably, the step a further includes a step of preparing a coating slurry in advance, and the preparation method of the coating slurry includes the steps of:
a) weighing 80% of water, placing the water in a container, sequentially adding a wetting agent, a grinding dispersant and a coupling agent which are accurately weighed, and fully stirring to completely dissolve or uniformly disperse the auxiliary agent;
b) accurately weighing the conductive carbon black and the high-conductivity filler, adding the conductive carbon black and the high-conductivity filler into the solution, and slowly and fully stirring to completely infiltrate the conductive carbon black and the high-conductivity filler;
c) accurately adding the aqueous polymer resin and the defoaming agent, and fully stirring;
d) adding the rest water, and fully stirring to uniformly disperse the conductive carbon black and the high-conductivity filler in the slurry;
e) and dispersing and grinding the mixture at a high speed by using grinding equipment for 15-30 minutes to prepare coating slurry.
The application further provides an electrothermal film taking a fiber fabric as a base material, wherein the fiber fabric is woven by using any one of glass fiber yarns, polyester fiber yarns and cotton fiber yarns;
the glass fiber yarn is alkali-free glass fiber yarn, and the linear density range is set to be 6-90 tex; the linear density range of the polyester fiber yarns and the cotton fiber yarns is set to be 18-86 tex;
the warp density range and the weft density range of the fiber fabric base material are set to be 50 pieces/10 cm-400 pieces/cm, the breadth range is set to be 200-3000 mm, and the piece length range is set to be 30-500 m.
Preferably, when the fiber fabric is woven, 5-100 warps are respectively replaced by conductive wires on two sides of the fiber fabric to form an electrode belt for electrical connection;
the conductive wire is selected from any one of a copper fiber wire, a stainless steel fiber wire, a carbon fiber wire, a soft copper wire or a copper foil wire with the diameter range of 0.05-0.8 mm.
Compared with the prior art, the method has the following beneficial effects:
1. the effective heating area of the electrothermal film is greatly improved, the working temperature of the electrothermal film under the same power density is reduced, the thermal efficiency is improved, and the working life is prolonged;
2. the electric contact performance between the current-carrying electrode of the electric heating film and the electric heating material is enhanced, and the safety performance of the electric heating film is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
FIG. 1 is a schematic view of the overall structure of a coating apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of an unwinding device of a coating apparatus according to the present invention;
FIG. 3 is a schematic view of the construction of a rolled fibrous textile substrate according to the present invention;
FIG. 4 is a schematic view of a coating apparatus of the coating apparatus according to the present invention;
FIG. 5 is a schematic structural view of a winding device of the coating apparatus according to the present invention;
FIG. 6 is a schematic rear view of a coating apparatus according to the present invention.
Reference numerals:
1-an unwinding device, 10-an unwinding frame body, 11-an unwinding mounting groove, 12-an unwinding guide structure, 121-an unwinding shaft, 122-an unwinding traction roller, 123-a first guide assembly, 1230-an unwinding guide roller, 124-an unwinding guide roller;
2-coating device, 20-coating frame body, 21-coating installation groove, 22-coating introduction structure, 221-coating transition roller, 222-coating guide roller, 23-coating mechanism, 231-slurry storage tank, 232-supporting roller, 233-comma scraper, 234-recovery scraper installation shaft, 235-slurry seepage recovery liquid receiving disc, 24-comma scraper adjustment structure, 241-first chute, 242-adjustment support, 243-adjustment cylinder and 244-first slide block;
3-drying device, 30-drying frame body, 31-supporting plate, 32-drying box, 33-drying box guide roller, 34-fan, 35-air pipe and 36-infrared electric heating plate;
4-a winding device, 40-a winding frame body, 41-a stretching frame body, 42-a winding installation groove, 43-a winding guide mechanism, 431-a winding shaft, 432-an adjusting roller, 433-a winding transition roller, 434-a winding traction roller, 435-a second guide component, 4350-an unwinding guide roller, 436-a cooling roller, 44-a stretching guide roller, 45-an adjusting roller control structure, 451-a second chute, 452-a second sliding block, 453-an adjusting bolt and 454-a screw cap;
5-an electrical control device; 6-line testing means; 7-fibrous textile substrate, 71-electrode tape.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Example 1: as shown in fig. 1 to 6, an electrothermal film coating apparatus using a fiber fabric as a substrate includes an unwinding device 1, a coating device 2, a drying device 3, and a winding device 4.
As shown in fig. 1, 2 and 3, the unwinding device 1 includes an unwinding frame body 10, and the unwinding frame body 10 has an unwinding mounting groove 11. Unreel mounting groove 11 and be used for placing and be web-shaped fabric substrate 7 and unreel the internally mounted of mounting groove 11 and unreel guide structure 12. The unreeling guide structure 12 can change the fiber fabric base material 7 from a coiled shape to a flat and stretched shape, and the flat and stretched fiber fabric base material 7 is led out of the unreeling installation groove 11.
As shown in fig. 1, 3 and 4, the coating apparatus 2 includes a coating frame body 20, the coating frame body 20 is located at one side of the unwinding frame body 10, and the coating frame body 20 has a coating installation groove 21. The coating installation groove 21 is provided therein with a coating introduction structure 22 and a coating mechanism 23. The textile base material 7 guided out of the unwinding mounting groove 11 can be guided into the application mounting groove 21 by the application guide structure 22, and the textile base material 7 can be applied by the application mechanism 23. When the coating device is used, the coating thickness of the coating device 2 is quantitatively adjusted by matching a micrometer with a feeler gauge.
As shown in fig. 1 and 6, the drying device 3 includes a drying frame body 30, the drying frame body 30 is located at the rear side of the coating frame body 20, a horizontal supporting plate 31 is provided at the upper side of the drying frame body 30, a drying box 32 is provided on the supporting plate 31, a front opening of the drying box 32 is opened at the front end of the drying box, the front opening of the drying box corresponds to the outlet of the coating installation groove 21, and a rear opening of the drying box 32 is opened at the rear end of the drying box. The drying box 32 has an oven guide roller 33 inside. In practice, a plurality of fans 34 are disposed on the upper side of the drying box 32, and the outlets of the fans 34 are communicated with the inside of the drying box 32. The inlet of the fan 34 positioned in the middle is connected together through the air pipe 35, so that only the air inlet of the fan at the forefront is needed to be fed, the fan in the middle can be sequentially fed, the air outlet of the fan at the rearmost is finally fed, and the drying efficiency of the drying box can be effectively improved.
As shown in fig. 1 and 5, the winding device 4 is located at the rear side of the drying rack 30, and the winding device 4 includes a winding rack 40 and a stretching rack 41. The winding frame body 40 is provided with a winding installation groove 42, the winding installation groove 42 is used for placing rolled guiding cloth (not shown) and a winding guide mechanism 43 is installed inside the winding installation groove 42; the winding guide mechanism 43 can change the cloth leading from a roll shape to a flat extending shape and lead the flat extending cloth out of the winding mounting groove 42; the rolling support body 40 top is located to the extension support body 41, be equipped with the guide roll 44 that extends on the extension support body 41, this guide roll 44 that extends can be with the cloth that draws that derives from rolling mounting inslot 42 in leading-in to stoving case 32 from the oven rear opening. In practice, the number of the spreader guide rollers 44 is two, wherein one spreader guide roller 44 is disposed at the rear end of the spreader body 41, and the other spreader guide roller 44 is disposed at the upper side of the spreader body 41. In practice, the upper side of the stretching frame 41 is flush with the bottom of the drying box 32.
As shown in fig. 1 and 3, the cloth guide can move to the opening in front of the oven through an oven guide roller 33 in the drying oven 32, and is connected with the fiber fabric substrate 7.
In practice, as shown in fig. 1 and 6, an electrical control device 5 is provided at the lower side of the drying rack 30, and the electrical control device 5 can control the temperatures of three regions in the drying box 32, respectively, and can also control the operating speeds and tensions of the unwinding device 1, the coating device 2, and the winding device 4 in synchronization.
In practice, as shown in FIG. 6, the bottom plate of the drying box 32 can be provided as an infrared electric heating plate 36, and the infrared electric heating plate 36 provides a heat source for the drying box 32, and the power density is 1000W/m2～5000W/m2The length is 300-1500 mm, the width is 300-1000 mm, and the thickness is 2-50 mm. Therefore, the infrared electric heating plate is adopted for heating, so that the energy consumption can be reduced, and the drying efficiency can be improved.
As shown in fig. 1, 2 and 3, the unreeling guide structure 12 includes an unreeling shaft 121, an unreeling pulling roller 122 and a first guide member 123, which are sequentially disposed from back to front in the unreeling mounting slot 11. The two ends of the unreeling traction roller 122 are rotatably connected with the side wall of the unreeling installation groove 11, and an unreeling guide roller 124 is arranged above the unreeling traction roller 122. The fiber fabric base material 7 is wound around the unwinding shaft 121. The fixed end of the fiber fabric substrate 7 is connected with the unreeling shaft 121, and the movable end of the fiber fabric substrate 7 firstly passes through a gap between the unreeling guide roller 124 and the unreeling traction roller 122, then passes through the first guide assembly 123 and finally penetrates out of the front end of the unreeling mounting groove 11; the upper and lower sides of the fiber fabric base material 7 are respectively contacted with the unwinding guide roller 124 and the unwinding traction roller 122. The first guide assembly 123 includes two unwinding guide rollers 1230 arranged at an upper and lower interval.
As shown in fig. 1 and 4, the coating introduction structure 22 includes a coating transition roller 221 and a coating guide roller 222 which are sequentially disposed from back to front in the coating installation groove 21. Both ends of the coating transition roller 221 are rotatably connected with the side walls of the coating installation groove 21. The coating mechanism 23 comprises a slurry storage tank 231, a supporting roller 232 is arranged above the slurry storage tank 231, a comma scraper 233 is arranged above the supporting roller 232, two ends of the comma scraper 233 are rotatably connected with the side wall of the coating installation groove 21, a slurry seepage recovery scraper (not shown) is arranged on the rear side of the supporting roller 232, the slurry seepage recovery scraper is rotatably connected with the coating installation groove 21 through a recovery scraper installation shaft 234, and a slurry seepage recovery liquid receiving disc 235 is arranged below the slurry storage tank 231.
Wherein. As shown in fig. 1 and 4, a comma blade adjusting structure 24 is disposed on a side wall of the coating installation groove 21, and the comma blade adjusting structure 24 includes a first slide groove 241 opened on the side wall of the coating installation groove 21, an adjusting bracket 242 disposed on an upper side of the first slide groove 241, an adjusting cylinder 243 mounted on the adjusting bracket 242, and a first slider 244 connected to an expansion shaft of the adjusting cylinder 243. The first slider 244 is fixedly connected to an end of the comma scraper 233, and the first slider 244 can move on the first sliding groove 241 along with the telescopic shaft of the adjusting cylinder 243.
As shown in fig. 1 and 5, the winding guide mechanism 43 includes a winding shaft 431, a regulating roller 432, a winding transition roller 433, a second guide assembly 435, and a cooling roller 436, which are sequentially disposed from front to back in the winding installation groove 42. And the two ends of the rolling transition roller 433 are rotatably connected with the side wall of the rolling mounting groove 42. And a winding traction roller 434 is arranged on the lower side of the cooling roller 436, and two ends of the winding traction roller 434 are rotatably connected with the side wall of the winding installation groove 42.
As shown in fig. 1, 5 and 6, the leader is wound around a winding shaft 431. The fixed end of the guiding cloth is connected with the winding shaft 431, and the movable end of the guiding cloth firstly passes through the adjusting roller 432, then passes through the winding transition roller 433, then passes through the second guide assembly 435, then passes through the gap between the cooling roller 436 and the winding traction roller 434, and finally passes out of the rear end of the winding installation groove 42 and enters the unfolding frame body 41. The second guide assembly 435 includes two unwinding guide rollers 4350 spaced up and down.
As shown in fig. 5, an adjusting roller control structure 45 is disposed on a side wall of the winding installation groove 42, and the adjusting roller control structure 45 includes a second sliding groove 451 disposed on the side wall of the winding installation groove 42, a second sliding block 452 movably disposed in the second sliding groove 451, and an adjusting bolt 453 connected to an upper end of the second sliding block 452. The second slider 452 is fixedly connected to an end of the adjustment roller 432, and an upper end of the adjustment bolt 453 penetrates an upper side of the second sliding groove 451 and is connected to a screw cap 454.
As shown in fig. 1 to 6, the present application further provides an electrothermal film coating process using a fiber fabric as a substrate, the coating process includes the following steps:
A. preparation of the fibrous web substrate 7 before coating: placing a fiber fabric substrate 7 in an unreeling mounting groove 11, and then drawing the fiber fabric substrate 7 into a coating mounting groove 21; placing the guiding cloth in a winding installation groove 42, then drawing the guiding cloth to pass through a stretching frame body 41, then enabling the guiding cloth to enter a drying box 32, flatly spreading the guiding cloth through a stretching guide roller 44 on the stretching frame body 41 and an oven guide roller 33 in the drying box 32, and then leading out the guiding cloth from an opening in front of an oven; reliably connecting the leading cloth led out from the front opening of the oven with the fiber fabric base material 7 from the coating installation groove 21; starting a drying box 32 to dry and heat the cloth guiding and the fiber fabric base material 7;
B. performing a coating process: the clearance between the comma blade 233 and the fiber fabric base material 7 is adjusted by using a feeler gauge until the clearance along the edge of the comma blade 233 is consistent, and then the comma blade 233 is fixed; dosing the coating slurry into the slurry reservoir 231; the slurry seepage recovery scraper is rotated until the slurry seepage recovery scraper is tightly attached to the supporting roller 232 by rotating the recovery scraper mounting shaft 234, so that the coating slurry adhered to the supporting roller 232 can be completely recovered to the slurry seepage recovery liquid receiving disc 235;
C. and (3) drying: starting the drying box 32, and dividing the inside of the drying box 32 into three regions with different temperatures, namely a front section, a middle section and a rear section, wherein the temperature of the middle section is higher than that of the rear section; driving oven guide roll 33 to bring coated fibrous web substrate 7 into drying oven 32; specifically, the running speed of the oven guide roller 33 is slowly increased in the initial stage, and the mechanical running speed can be increased to the speed required by the process while ensuring that all fiber fabric base materials can run stably, smoothly and smoothly;
D. carrying out an electrical property online test procedure: starting an electrothermal film online testing device 6 arranged at the rear side of a winding installation groove 42, wherein the electrothermal film online testing device 6 comprises 1-3 sets of resistance testing probes, probe fixing mechanisms with corresponding quantity and a multi-channel resistance recorder, setting a data sampling interval and a data upper and lower limit alarm range through the resistance recorder, and then adjusting the probe fixing mechanisms to enable the resistance testing probes to be tightly attached to the coating surface of a fiber fabric substrate 7;
E. carrying out a winding process: and closing the drying box 32, and after the electric heating film coiled material is cooled, starting the rolling traction roller 434 to drive the cloth to drive the coated fiber fabric substrate 7 to be recovered.
During implementation, in the step C, the mechanical operation speed is controlled to be 2-20 m/min; preferably, the machine operation speed is controlled to be 6-15 m/min.
During implementation, in the step C, the temperature control range of the first section is 40-100 ℃, the temperature control range of the middle section is 60-120 ℃, and the temperature control range of the last section is 50-100 ℃.
In step D, when the continuous upper limit or lower limit alarm occurs, the operation speed should be reduced or stopped in time, and the gap of the comma knife 233 of the coating apparatus 2 is adjusted, or the machine operation speed is adjusted, so that the online data is returned to the normal range.
In the step D, the data sampling interval is 0.1-60 s. Preferably, the data sampling interval is 1-10 s. And the upper and lower data limit alarm ranges are set according to process requirements.
In practice, after step E is completed, the following inspection steps should be performed: 1. checking the drying condition and the coating uniformity of the coated fiber fabric base material, and timely adjusting the problems to meet the process requirements; 2. checking the rolling opposite side condition, and timely adjusting the deviation correcting device when a problem exists to ensure that the coated fiber fabric substrate 7 is rolled, leveled and edge-leveled to meet the requirements of subsequent processes; 3. and inspecting the surface of the coated fiber fabric base material 7, and marking in time when the defects specified by the process standard are found, so that the requirements of the subsequent processes are met.
Preferably, the step a further includes a step of preparing a coating slurry in advance, and the preparation method of the coating slurry includes the steps of:
a) weighing 80% of water, placing the water in a container, sequentially adding a wetting agent, a grinding dispersant and a coupling agent which are accurately weighed, and fully stirring to completely dissolve or uniformly disperse the auxiliary agent;
b) accurately weighing the conductive carbon black and the high-conductivity filler, adding the conductive carbon black and the high-conductivity filler into the solution, and slowly and fully stirring to completely infiltrate the conductive carbon black and the high-conductivity filler;
c) accurately adding the aqueous polymer resin and the defoaming agent, and fully stirring;
d) adding the rest water, and fully stirring to uniformly disperse the conductive carbon black and the high-conductivity filler in the slurry;
e) and dispersing and grinding the mixture at a high speed by using grinding equipment for 15-30 minutes to prepare coating slurry.
The coating slurry comprises 100 parts by mass of water-based polymer resin, 3-45 parts by mass of conductive carbon black, 0-12 parts by mass of high-conductivity filler, 1-15 parts by mass of auxiliary agent and 80-500 parts by mass of water.
In the implementation process, the aqueous polymer resin is one of aqueous epoxy resin, aqueous polyurethane resin, aqueous acrylic resin and aqueous fluorocarbon resin. Preferably, the aqueous polymer resin is an aqueous polyurethane resin. The high-conductivity filler is stainless steel fiber short fiber, carbon nanotube and graphene. The auxiliary agent is a wetting agent, a defoaming agent, a grinding dispersant and a coupling agent.
As shown in fig. 3, the present application further provides an electrothermal film using a fiber fabric as a base material, and the fiber fabric base material 7 may be a fabric woven by using one of glass fiber yarn, polyester fiber yarn, and cotton fiber yarn. The glass fiber yarn is alkali-free glass fiber yarn, and the linear density range is 6-90 tex. The linear density range of the polyester fiber yarns and the cotton fiber yarns is 18-86 tex.
In practice, the warp and weft density of the fiber fabric base material 7 ranges from 50 threads/10 cm to 400 threads/cm. Preferably, the warp density and the weft density of the fiber fabric substrate 7 range from 100 threads/10 cm to 300 threads/10 cm.
In practice, the fiber fabric substrate 7 has a width of 200 to 3000mm, a web length of 30 to 500m, and a thickness of 0.1 to 1.0 mm. Preferably, the width of the fiber fabric substrate 7 is 250 to 1000mm, the length of the piece is 40 to 200m, and the thickness is 0.1 to 0.5 mm.
In practice, the conductive wires are used to replace 5 to 100 warps on both sides of the fiber fabric to form the electrode tape 71 for electrical connection when the fiber fabric substrate 7 is woven. The conductive wire is selected from any one of a copper fiber wire, a stainless steel fiber wire, a carbon fiber wire, a soft copper wire or a copper foil wire with the diameter of 0.05-0.8 mm. Preferably, the conductive wire is a soft copper wire or a copper foil wire.
In example 1, the procedure was as follows:
1) preparing a fiber fabric substrate:
selecting polyester fiber yarn with the linear density of 36tex, and performing warp weaving at the surface density of 200 warps and wefts/10 cm; the width of the fabric is 1000mm, and the length of the piece is 100 m. The conductive wire used for forming the electrode belt is formed by selecting 5 twisted tinned soft copper stranded wires with the diameter of 0.1mm to replace 12 warps on two sides of a fiber fabric substrate 7.
2) And preparing coating slurry:
the formula of the coating slurry comprises the following components in parts by mass: 100 parts of waterborne polyurethane resin, 18 parts of conductive carbon black, 1.0 part of wetting agent, 0.6 part of defoaming agent, 1.2 parts of grinding dispersant, 0.5 part of coupling agent and 200 parts of water; then, the coating paste is manufactured according to the operation steps of the preparation method of the coating paste.
3) Presetting coating process parameters:
the gap between the knife edge of the comma scraper and the fiber fabric substrate is 0.4 mm; the mechanical speed of coating operation is 8-12 m/min; controlling the temperature of the drying device at the first section of 60 ℃, the middle section of 100 ℃ and the end section of 80 ℃; the parameters of the electric heating film on-line testing device are as follows: the data sampling interval is 1s, the upper limit alarm value is 180 omega, and the lower limit alarm value is 110 omega.
4) The operation is carried out according to the step A in the coating process, and the preparation is carried out before the polyester fiber fabric substrate is coated; sequentially operating according to the step B, the step C and the step D in the coating process; then setting and adjusting corresponding technological processes respectively according to the coating technological parameters in the step 3); and finally, finishing the coating production process according to the requirements of the step E in the coating process.
According to example 1, the product can be made into a width of 1000mm, a working voltage of 220V, and a power density of 200W/m2The electrothermal film.
Example 2: this example differs from example 1 only in that:
1) preparing a fiber fabric substrate:
selecting alkali-free glass fiber yarns with the linear density of 72tex, and performing warp weaving at the surface density of 160 threads/10 cm; the width of the fabric is 500mm, and the length of the piece is 100 m; a single tinned soft copper stranded wire with the diameter of 0.07mm and 7 twisted into 1 is selected to replace 30 warps on two sides of a fiber fabric substrate 7.
2) And preparing coating slurry:
the formula of the coating slurry comprises the following components in parts by mass: 100 parts of waterborne polyurethane resin, 28 parts of conductive carbon black, 1.1 parts of wetting agent, 0.6 part of defoaming agent, 1.4 parts of grinding dispersant, 0.8 part of coupling agent and 240 parts of water; then, the coating paste is manufactured according to the operation steps of the preparation method of the coating paste.
3) Presetting coating process parameters:
the gap between the knife edge of the comma scraper and the fiber fabric substrate is 0.35 mm; the mechanical speed of coating operation is 8-12 m/min; controlling the temperature of the drying device, wherein the temperature of the first section is 60 ℃, the temperature of the middle section is 120 ℃, and the temperature of the last section is 90 ℃; the parameters of the electric heating film on-line testing device are as follows: the data sampling interval is 1s, the upper limit alarm value is 150 omega, and the lower limit alarm value is 100 omega.
4) The operation is carried out according to the step A in the coating process, and the preparation is carried out before the polyester fiber fabric substrate is coated; sequentially operating according to the step B, the step C and the step D in the coating process; then setting and adjusting corresponding technological processes respectively according to the coating technological parameters in the step 3); and finally, finishing the coating production process according to the requirements of the step E in the coating process.
According to example 2, the product can be made into a width of 500mm, a working voltage of 220V, and a power density of 1000W/m2The electrothermal film.
Example 3: this example differs from example 1 only in that:
1) preparing a fiber fabric substrate:
selecting 56tex cotton yarn, and performing warp weaving at warp and weft density of 180 pieces/10 cm; the width of the fabric is 250mm, and the length of the piece is 200 m. The conductive wire used for forming the electrode belt is made of copper foil filaments with the diameter of 0.3mm, and 40 warp yarns on two sides of the fiber fabric substrate 7 are replaced.
2) And preparing coating slurry:
the formula of the coating slurry comprises the following components in parts by mass: 100 parts of waterborne polyurethane resin, 28 parts of conductive carbon black, 10 parts of carbon fiber short fiber, 1.0 part of defoaming agent, 1.5 parts of grinding dispersant and 200 parts of water; then, the coating paste is manufactured according to the operation steps of the preparation method of the coating paste.
3) Presetting coating process parameters:
the gap between the knife edge of the comma scraper and the fiber fabric substrate is 0.5 mm; the mechanical speed of coating operation is 6-10 m/min; controlling the temperature of the drying device, wherein the temperature of the first section is 60 ℃, the temperature of the middle section is 120 ℃, and the temperature of the last section is 90 ℃; the parameters of the electric heating film on-line testing device are as follows: the data sampling interval is 1s, the upper limit alarm value is 40 omega, and the lower limit alarm value is 25 omega.
4) The operation is carried out according to the step A in the coating process, and the preparation is carried out before the polyester fiber fabric substrate is coated; sequentially operating according to the step B, the step C and the step D in the coating process; then setting and adjusting corresponding technological processes respectively according to the coating technological parameters in the step 3); and finally, finishing the coating production process according to the requirements of the step E in the coating process.
According to example 3, the material can be made into a width of 250mm, a working voltage of 24V, and a power density of 200W/m2The electrothermal film.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. An electrothermal film coating device using fiber fabric as a base material is characterized by comprising:
the unwinding device comprises an unwinding frame body, and the unwinding frame body is provided with an unwinding mounting groove; the unreeling installation groove is used for placing a rolled fiber fabric substrate, and an unreeling guide structure is arranged in the unreeling installation groove; the unreeling guide structure can change the fiber fabric base material from a coiled shape to a flat stretched shape, and lead the flat stretched fiber fabric base material out of the unreeling installation groove;
the coating device comprises a coating frame body, the coating frame body is positioned on one side of the unreeling frame body, and the coating frame body is provided with a coating installation groove; a coating leading-in structure and a coating mechanism are arranged in the coating installation groove; the fiber fabric base material led out from the unreeling installation groove can be led into the coating installation groove through the coating leading-in structure, and the fiber fabric base material is coated through the coating mechanism;
the drying device comprises a drying frame body, the drying frame body is positioned at the rear side of the coating frame body, a horizontal supporting plate is arranged on the upper side of the drying frame body, a drying box is arranged on the supporting plate, the front end of the drying box is provided with a front opening of an oven, the front opening of the oven corresponds to an outlet of the coating installation groove, and the rear end of the drying box is provided with a rear opening of the oven; an oven guide roller is arranged inside the drying box;
the winding device is positioned at the rear side of the drying rack body and comprises a winding rack body and an unfolding rack body; the winding frame body is provided with a winding installation groove, the winding installation groove is used for placing rolled cloth guiding, and a winding guide mechanism is arranged in the winding installation groove; the winding guide mechanism can change the drawing cloth from a roll shape to a flat stretching shape and guide the flat stretching drawing cloth out of the winding mounting groove; the unfolding guide roller can guide the guiding cloth guided out from the winding installation groove into the drying box from the rear opening of the drying box;
the cloth guiding device comprises a drying box, a cloth guiding roller and a fiber fabric base material, wherein the cloth guiding roller can move to an opening in front of the drying box through the drying box, and is connected with the fiber fabric base material.
2. The electrothermal film coating apparatus using a fiber fabric as a substrate according to claim 1, wherein the unwinding guide structure comprises an unwinding shaft, an unwinding traction roller and a first guide assembly which are sequentially arranged in the unwinding mounting groove from back to front; the two ends of the unreeling traction roller are rotatably connected with the side wall of the unreeling mounting groove, and an unreeling guide roller is arranged above the unreeling traction roller;
the fiber fabric base material is wound and rolled on a unwinding shaft; the fixed end of the fiber fabric substrate is connected with the unreeling shaft, and the movable end of the fiber fabric substrate firstly passes through a gap between the unreeling guide roller and the unreeling traction roller, then passes through the first guide assembly and finally penetrates out of the front end of the unreeling mounting groove; wherein, the upper and lower both sides of the fiber fabric substrate are respectively contacted with the unreeling guide roller and the unreeling traction roller.
3. The electrothermal film coating apparatus using a fiber fabric as a base material according to claim 1, wherein the coating introduction structure comprises a coating transition roller and a coating guide roller which are sequentially arranged from back to front in the coating installation groove; the two ends of the coating transition roller are rotatably connected with the side wall of the coating installation groove;
coating mechanism includes the thick liquids storage tank, the top of thick liquids storage tank is provided with the backing roll, and the top of backing roll is provided with the comma scraper, the both ends of comma scraper rotate with the lateral wall of coating mounting groove to be connected, and the rear side of backing roll is provided with oozes thick liquid and retrieves the scraper, ooze thick liquid and retrieve the scraper and rotate with the coating mounting groove through retrieving scraper installation axle and be connected, the below of thick liquids storage tank is provided with oozes thick liquid and retrieves and connect the liquid dish.
4. The electrothermal film coating equipment taking the fiber fabric as the base material according to claim 3, wherein a comma scraper adjusting structure is arranged on the side wall of the coating installation groove, and comprises a first sliding groove arranged on the side wall of the coating installation groove, an adjusting bracket arranged on the upper side of the first sliding groove, an adjusting cylinder arranged on the adjusting bracket, and a first sliding block connected with a telescopic shaft of the adjusting cylinder; the first sliding block is fixedly connected with the end part of the comma scraper, and the first sliding block can move on the first sliding groove along with the telescopic shaft of the adjusting cylinder.
5. The electrothermal film coating equipment taking the fiber fabric as the base material according to claim 1, wherein the winding guide mechanism comprises a winding shaft, an adjusting roller, a winding transition roller, a second guide assembly and a cooling roller which are sequentially arranged in the winding installation groove from front to back; two ends of the winding transition roller are rotatably connected with the side wall of the winding mounting groove; the lower side of the cooling roller is provided with a winding traction roller, and two ends of the winding traction roller are rotatably connected with the side wall of the winding mounting groove;
wherein the cloth guiding winding roll is arranged on the winding shaft; the fixed end of the leading cloth is connected with the winding shaft, and the movable end of the leading cloth firstly passes through the adjusting roller, then passes through the winding transition roller, then passes through the second guide assembly, then passes through the gap between the cooling roller and the winding traction roller, and finally passes out of the rear end of the winding installation groove and enters the unfolding frame body.
6. An electrothermal film coating device taking a fiber fabric as a base material according to claim 5, wherein an adjusting roller control structure is arranged on the side wall of the winding mounting groove, and the adjusting roller control structure comprises a second chute arranged on the side wall of the winding mounting groove, a second sliding block movably arranged in the second chute, and an adjusting bolt connected with the upper end of the second sliding block; the second sliding block is fixedly connected with the end part of the adjusting roller, and the upper end of the adjusting bolt penetrates through the upper side of the second sliding groove and is connected with a spiral cover.
7. An electrothermal film coating process taking fiber fabric as a base material is characterized by comprising the following steps:
A. preparation of the fibrous textile substrate before coating: placing a fiber fabric substrate in an unreeling installation groove, and then drawing the fiber fabric substrate into a coating installation groove; placing a guide cloth in a winding installation groove, then drawing the guide cloth to pass through a stretching frame body, then enabling the guide cloth to enter a drying box, flatly spreading the guide cloth through a stretching guide roller on the stretching frame body and an oven guide roller in the drying box, and then leading out the guide cloth from a front opening of an oven; reliably connecting the leading cloth led out from the front opening of the oven with the fiber fabric base material from the coating installation groove; starting a drying box to dry and heat the cloth guiding and the fiber fabric base material;
B. performing a coating process: adjusting the gap between the comma scraper and the fiber fabric base material by using a feeler gauge until the gap along the edge of the comma scraper is consistent, and then fixing the comma scraper; quantitatively feeding the coating slurry into a slurry storage tank; the slurry seepage recovery scraper is rotated until the slurry seepage recovery scraper is tightly attached to the supporting roller by rotating the installation shaft of the recovery scraper, so that the coating slurry adhered to the supporting roller can be completely recovered to the slurry seepage recovery liquid receiving disc;
C. and (3) drying: starting the drying box, and dividing the interior of the drying box into three regions with different temperatures, namely a front section, a middle section and a rear section, wherein the temperature of the middle section is higher than that of the rear section and higher than that of the front section; driving a drying oven guide roller to enable the coated fiber fabric substrate to enter a drying oven;
D. carrying out an electrical property online test procedure: starting an electrothermal film online testing device arranged at the rear side of a winding installation groove, wherein the electrothermal film online testing device comprises 1-3 sets of resistance testing probes, probe fixing mechanisms with corresponding quantity and a multichannel resistance recorder, setting a data sampling interval and a data upper and lower limit alarm range through the resistance recorder, and then adjusting the probe fixing mechanisms to enable the resistance testing probes to be tightly attached to the coating surface of a fiber fabric substrate;
E. carrying out a winding process: and closing the drying box, starting a winding traction roller to drive the cloth to drive the coated fiber fabric substrate to be recovered after the electric heating film coiled material is cooled.
8. The electrothermal film coating process using a fiber fabric as a base material according to claim 7, further comprising a step of preparing coating slurry in advance in the step A, wherein the preparation method of the coating slurry comprises the following steps:
a) weighing 80% of water, placing the water in a container, sequentially adding a wetting agent, a grinding dispersant and a coupling agent which are accurately weighed, and fully stirring to completely dissolve or uniformly disperse the auxiliary agent;
b) accurately weighing the conductive carbon black and the high-conductivity filler, adding the conductive carbon black and the high-conductivity filler into the solution, and slowly and fully stirring to completely infiltrate the conductive carbon black and the high-conductivity filler;
c) accurately adding the aqueous polymer resin and the defoaming agent, and fully stirring;
d) adding the rest water, and fully stirring to uniformly disperse the conductive carbon black and the high-conductivity filler in the slurry;
e) and dispersing and grinding the mixture at a high speed by using grinding equipment for 15-30 minutes to prepare coating slurry.
9. An electrothermal film taking a fiber fabric as a base material is characterized in that the fiber fabric is a fabric woven by any one of glass fiber yarn, polyester fiber yarn and cotton fiber yarn;
the glass fiber yarn is alkali-free glass fiber yarn, and the linear density range is set to be 6-90 tex; the linear density range of the polyester fiber yarns and the cotton fiber yarns is set to be 18-86 tex;
the warp density range and the weft density range of the fiber fabric base material are set to be 50 pieces/10 cm-400 pieces/cm, the breadth range is set to be 200-3000 mm, and the piece length range is set to be 30-500 m.
10. The electrothermal film with the fiber fabric as the base material according to claim 9, wherein the fiber fabric is woven by replacing 5 to 100 warps on both sides of the fiber fabric with conductive wires to form an electrode band for electrical connection;
the conductive wire is selected from any one of a copper fiber wire, a stainless steel fiber wire, a carbon fiber wire, a soft copper wire or a copper foil wire with the diameter range of 0.05-0.8 mm.
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