CN114589021A - Method and device for preparing photo-thermal curing electrostatic spray film - Google Patents

Method and device for preparing photo-thermal curing electrostatic spray film Download PDF

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Publication number
CN114589021A
CN114589021A CN202210274873.6A CN202210274873A CN114589021A CN 114589021 A CN114589021 A CN 114589021A CN 202210274873 A CN202210274873 A CN 202210274873A CN 114589021 A CN114589021 A CN 114589021A
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film
photo
roller
support frame
thermal curing
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CN202210274873.6A
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CN114589021B (en
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陈逢军
刘鑫
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Wenzhou University of Technology
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Hunan University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
    • B05B5/084—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects the objects lying on, or being supported above conveying means, e.g. conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2502/00—Acrylic polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Polymerisation Methods In General (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention discloses a method and a device for preparing a photo-thermal curing electrostatic spray film, belonging to the technical field of film preparation and electrostatic atomization. By utilizing the electrostatic spraying technology, the photo-thermal mixed liquid is deposited on the receiving cloth, and the photo-thermal curing resin is subjected to curing reaction by combining with ultraviolet light-thermal mixed curing to form a layer of uniform and compact film for collection, so that the problems of low preparation efficiency, easy damage of the film, difficulty in collection and high equipment requirement of the traditional film are solved. The curing and forming process has strong operability and high curing speed, and the film has higher mechanical property. The device can realize large-area customization and storage of the film, is simple and effective, and reduces the cost of film preparation.

Description

Method and device for preparing photo-thermal curing electrostatic spray film
Technical Field
The invention belongs to the technical field of film preparation and electrostatic atomization, and particularly relates to a method and a device for preparing an electrostatic spray film by photo-thermal curing.
Background
The electrostatic spraying utilizes high-voltage static electricity to break and refine the charged liquid, can improve the spraying effect and improve the film forming quality, is a novel film preparation technology, and has the advantages of strong controllability, simple equipment, low cost and the like; the existing film preparation has the problems of low efficiency, easy damage of the film, difficult collection, high equipment requirement and the like. Electrostatic spraying has the property of depositing minute droplets, and a dense thin film can be obtained by uniformly depositing minute droplets on a target substrate.
At present, the film formed by electrostatic spray photocuring has lower mechanical property and long thermosetting molding time. The electrostatic spraying photo-thermal mixed curing process combines photo-curing and thermal curing, effectively overcomes the defect of single curing, and further improves the curing speed and the molding quality. After spray deposition, the photo-thermal curing resin is continuously subjected to curing reaction by means of ultraviolet light and a heating area to form a film; the curing and forming process has strong operability and high curing speed, and the film has higher mechanical property.
Disclosure of Invention
In order to solve the problems, the invention discloses a method and a device for preparing an electrostatic spray film by photo-thermal curing. The invention combines the electrostatic spraying technology and the ultraviolet-heat mixed curing technology. The film has high curing and forming efficiency and good uniformity. By utilizing the characteristics of electrostatic spray deposition and the collecting effect of the film collecting unit, large-area customization and storage of the film can be realized, and the problems of low yield, non-uniform film and the like of the traditional film preparation are solved. The device is simple and effective, and the cost of film preparation is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method and a device for preparing a photo-thermal curing electrostatic spray film comprise a device supporting unit, a film collecting unit, an electrostatic spray unit and a photo-thermal curing unit.
The device supporting unit comprises a bottom plate, a stand column, a cross beam and a guide rail I; the bottom plate is connected with a support frame I, a support frame II, an upright post and a high-voltage electrostatic generator; the upright columns are symmetrically distributed on two sides of the bottom plate, and the upper part of the upright columns is connected with a cross beam for supporting and connecting the electrostatic spraying unit; the upper part of the beam is provided with two parallel grooves.
The film collecting unit comprises a support frame I, a roller II, a bearing seat, a bearing I, a motor I, a coupler and a belt; the bottom surface of the support frame I is fixed on the bottom plate; the roller I is positioned on the upper layer of the support frame I and used for releasing the receiving cloth; the roller II is positioned at the lower layer of the support frame I and is used for rolling the receiving cloth; the bearing seats are connected to the front end and the rear end of the support frame I and used for supporting the roller I and the roller II; one end of the belt is located on the shaft of the roller I, the other end of the belt is located on the shaft of the roller II, and the belt is driven by the motor I to achieve the purpose of synchronous rotation.
The electrostatic spraying unit comprises a push rod, a nozzle, a movable plate, a micro-injection pump, a liquid storage cylinder, a mounting plate, a film, a guide rail II, an annular electrode, a high-voltage electrostatic generator, an electrode wire I and an electrode wire II; the push rod is connected to the upright post and connected with the moving plate, and provides thrust for adjusting the distance between the N nozzles; the number of the nozzles is N; the front surface of the moving plate is connected with the mounting plate and used for fixing the nozzle, and the side surface of the moving plate is provided with two through holes and used for connecting the guide rail II; the liquid storage cylinder is used for storing the electrostatic photo-thermal curing mixed liquid; the mounting plate is used for mounting the nozzle; two ends of the guide rail II are connected with the upright post, and the middle of the guide rail II penetrates through the through hole in the movable plate to play a role in supporting and guiding; the high-voltage electrostatic generator is positioned on the bottom plate; one end of the electrode wire I is connected with the anode of the high-voltage electrostatic generator, and the other end of the electrode wire I is connected with the annular electrode; one end of the electrode wire II is connected with the negative electrode of the high-voltage electrostatic generator, and the other end of the electrode wire II is connected with the nozzle.
The photo-thermal curing unit comprises a heating device, a roller, a support frame II, a support plate, an ultraviolet lamp baffle, a motor III, an arc ultraviolet lamp, receiving cloth and an ultraviolet lamp fixing bolt; the heating device comprises a synchronous belt wheel, a synchronous belt, an annular heating pipe, a motor II, a gear, a movable boss, a connecting pipe and a heating wire; the number of the annular heating pipes is NX; the motor II is connected with a gear, drives a synchronous belt pulley to rotate and is used for adjusting the position of the annular heating pipe; one end of the connecting pipe is connected with the annular heating pipe, and the other end of the connecting pipe is connected with the movable lug boss; the roller comprises a fixing bolt, a fixing plate, an end cover, a bearing II and a rotary support frame; the fixed plates are connected to two sides above the support frame II and used for mounting the roller; the end cover is connected to the fixing plate; a rotating shaft of the rotating support frame is connected with a motor III, and four support end surfaces are connected with the wall surface of the roller and used for supporting the roller to rotate; the bottom surface of the support frame II is fixed in the middle of the bottom plate and is aligned with the support frame I; the ultraviolet lamp baffle is positioned at the outermost side, the middle of the ultraviolet lamp baffle is provided with a through hole, and the interior of the ultraviolet lamp baffle is connected with an arc ultraviolet lamp; the receiving cloth is used for receiving the spray and then forming a film.
The improvement is further that N nozzles are provided, and the inner diameter of each nozzle is 0.2-0.8 mm; the adjusting distance of the push rod is 0-200 mm; the voltage regulation range of the high-voltage electrostatic generator is-20 kV-0; the flow range of the micro-injection pump is 0-100 ml/h; the range of the intermediate diameter of the annular electrode is 30-40 mm.
The improved liquid storage cylinder is internally provided with an electrostatic photo-thermal curing mixed liquid, wherein the electrostatic photo-thermal curing mixed liquid comprises 32-35% of polyurethane acrylic resin, 28-32% of photoinitiator diphenyl iodonium salt, 18-20% of deionized water and 13-22% of additives by mass respectively; the additive is one or any mixture of absolute ethyl alcohol, kerosene and tween.
The further improvement is that the annular heating pipe is concentric with the wall surface of the roller when being installed, the heating range is the whole roller wall surface, and the adjusting distance is 0-130 mm.
Further improvement, a heating wire is embedded in the annular heating pipe, and the inner diameter range is 120-150 mm; the number of the annular heating pipes is NX, X is the number of the annular heating pipes required by the working of a single nozzle, and the range of X is 1-M.
In a further improvement, the central rotating shaft of the rotating support frame is connected with a motor III, the four support end surfaces are arc-shaped, the arc length of the four support end surfaces is 3-10 mm, and the arc length of the four support end surfaces is the same as that of the wall surface of the roller.
The improved drum is characterized in that the arc ultraviolet lamps are uniformly distributed on the arc surface, the arc surface is concentric with the wall surface of the drum, the arc length is 200-300 mm, the film can be uniformly and rapidly subjected to photocuring when passing through an ultraviolet lamp area, and two threaded holes in the middle are used for being connected with an ultraviolet lamp baffle.
In a further improvement, the receiving cloth is discharged from the roller I, is solidified into a film after receiving the spray by the roller, and is finally collected by the roller II.
The invention provides a method for preparing a photo-thermal curing electrostatic spray film, which comprises the following steps:
the method comprises the following steps that firstly, a photo-thermal curing unit and a film collecting unit are installed on a bottom plate, the distance between the photo-thermal curing unit and the film collecting unit is adjusted to be 40-60 mm, and a guide rail II is fixed on an upright post and used for supporting and connecting an installation plate;
step two, mixing and stirring the polyurethane acrylic resin, the photoinitiator diphenyl iodonium salt, the deionized water and the additive according to a certain mass ratio to prepare uniformly dispersed electrostatic photo-thermal curing mixed solution, and storing the mixed solution in a liquid storage cylinder;
connecting one end of an electrode wire I with the anode of a high-voltage electrostatic generator, connecting the other end of the electrode wire I with an annular electrode, connecting one end of an electrode wire II with the cathode of the high-voltage electrostatic generator, and connecting the other end of the electrode wire II with a nozzle;
adjusting the positions of NX annular heating pipes, starting a heating device, adjusting the distance between N nozzles to control the width of the film, and starting a high-voltage electrostatic generator and a micro-injection pump;
step five, starting a motor III and a motor I after the spraying is stable, and opening an arc ultraviolet lamp;
and step six, when the film collection is finished, turning off the micro-injection pump, turning off the arc ultraviolet lamp and the heating device, turning off the motor III and the motor I, and taking down the film.
Optionally, in the fourth step, the specific opening number of the N nozzles and the NX annular heating pipes may be adjusted simultaneously to obtain the film with the specified area.
Optionally, in the fifth step, the motor III and the motor I are started, and the rotating speed is adjusted to be 10-30 r/min.
The invention has the beneficial effects that:
the electrostatic spraying and photo-thermal curing method are combined, and the ultraviolet-thermal mixing curing enables the film to be high in curing forming efficiency and good in uniformity; by utilizing the characteristics of electrostatic spray deposition and the collecting effect of the film collecting unit, large-area customization and storage of the film can be realized, and the problems of low yield and non-uniform film in the traditional film preparation are solved; the device is simple and effective, and the cost of film preparation is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the supporting unit of the device of the present invention;
FIG. 3 is a schematic view of the structure of a membrane collection unit according to the present invention;
FIG. 4 is a schematic structural view of an electrostatic spray unit according to the present invention;
FIG. 5 is a schematic illustration of an electrostatic spraying process according to the present invention;
FIG. 6 is a schematic view of the heating apparatus according to the present invention;
FIG. 7 is a schematic partial cross-sectional view of the drum of the present invention;
FIG. 8 is a schematic view of the inner structure of the drum according to the present invention;
FIG. 9 is a schematic view of the arc UV lamp of the present invention;
FIG. 10 is a schematic view of the electrode line connections, the formation of the film and the collection of the invention;
wherein:
1 device support Unit
101 bottom plate, 102 vertical columns, 103 cross beams, 104 guide rails I
2 film collecting unit
201 support frame I, 202 running roller I, 203 running roller II, 204 bearing frame, 205 bearing I, 206 motor I, 207 shaft coupling, 208 belt
3 Electrostatic spraying Unit
301 push rod, 302 nozzle, 303 annular electrode, 304 guide rail II, 305 moving plate, 306 micro-injection pump, 307 mounting plate, 308 liquid storage cylinder, 309 film, 310 high-voltage electrostatic generator, 311 electrode wire I, 312 electrode wire II
4 photo-thermal curing unit
401 heating device, 402 roller, 403 support frame II, 404 support plate, 405 ultraviolet lamp baffle, 406 motor III, 407 arc ultraviolet lamp, 408 receiving cloth, 409 ultraviolet lamp fixing bolt
401-1 synchronous pulley, 401-2 synchronous belt, 401-3 annular heating pipe, 401-4 motor II, 401-5 gear, 401-6 moving boss, 401-7 connecting pipe and 401-8 heating wire
402-1 fixing bolt, 402-2 fixing plate, 402-3 rotating support frame, 402-4 bearing II and 402-5 end cover
Detailed Description
The following examples are given for the purpose of illustrating the present invention, and the detailed embodiments and specific procedures are given for the purpose of implementing the present invention, but the scope of the present invention is not limited to the following examples.
A method and a device for preparing a photo-thermal curing electrostatic spray film relate to a device comprising a device supporting unit 1, a film collecting unit 2, an electrostatic spray unit 3 and a photo-thermal curing unit 4.
The device supporting unit 1 comprises a bottom plate 101, a vertical column 102, a cross beam 103 and a guide rail I104; the bottom plate 101 is connected with a support frame I201, a support frame II 403, a stand column 102 and a high-voltage electrostatic generator 310; the upright posts 102 are symmetrically distributed on two sides of the bottom plate 101, and the upper part of the upright posts is connected with a cross beam 103 which is used for supporting and connecting the electrostatic spraying unit 3; the upper part of the cross beam 103 is provided with two parallel grooves.
The film collecting unit 2 comprises a support frame I201, a roller I202, a roller II 203, a bearing seat 204, a bearing I205, a motor I206, a coupler 207 and a belt 208; the bottom surface of the support frame I201 is fixed on the bottom plate 101; the roller I202 is positioned on the upper layer of the support frame I201 and used for releasing the receiving cloth 408; the roller II 203 is positioned at the lower layer of the support frame I201 and used for rolling the receiving cloth 408; the bearing seat 204 is connected to the front end and the rear end of the support frame I201 and used for supporting the roller I202 and the roller II 203; one end of the belt 208 is located on the shaft of the roller I202, the other end of the belt is located on the shaft of the roller II 203 and is driven by the motor I206 to achieve the purpose of synchronous rotation.
The electrostatic spraying unit 3 comprises a push rod 301, a nozzle 302, a moving plate 305, a micro-injection pump 306, a liquid storage cylinder 308, a mounting plate 307, a film 309, a guide rail II 304, an annular electrode 303, a high-voltage electrostatic generator 310, an electrode wire I311 and an electrode wire II 312; the push rod 301 is connected to the upright post 102 and connected to the moving plate 305, and provides a thrust for adjusting the distance between the 2 nozzles 302; the number of the nozzles 302 is 2; the front surface of the moving plate 305 is connected with a mounting plate 307 for fixing the nozzle 302, and the side surface of the moving plate is provided with two through holes for connecting with a guide rail II 304; the liquid storage cylinder 308 is used for storing electrostatic photo-thermal curing mixed liquid; the mounting plate 307 is used for mounting the nozzle 302; two ends of the guide rail II 304 are connected with the upright post 102, and the middle part of the guide rail II penetrates through a through hole in the moving plate 305 to play a role in supporting and guiding; the high-voltage electrostatic generator 310 is positioned on the bottom plate 101; one end of the electrode wire I311 is connected with the anode of the high-voltage electrostatic generator 310, and the other end of the electrode wire I311 is connected with the annular electrode 303; one end of the electrode wire II 312 is connected with the negative electrode of the high-voltage electrostatic generator 310, and the other end is connected with the nozzle 302.
The photo-thermal curing unit 4 comprises a heating device 401, a roller 402, a support frame II 403, a support plate 404, an ultraviolet lamp baffle 405, a motor III 406, an arc-shaped ultraviolet lamp 407, a receiving cloth 408 and an ultraviolet lamp fixing bolt 409; the heating device 401 comprises a synchronous pulley 401-1, a synchronous belt 401-2, an annular heating pipe 401-3, a motor II 401-4, a gear 401-5, a movable boss 401-6, a connecting pipe 401-7 and a heating wire 401-8; the number of the annular heating pipes 401-3 is 8; the motor II 401-4 is connected with a gear 401-5 and drives a synchronous pulley 401-1 to rotate so as to adjust the position of the annular heating pipe 401-3; one end of the connecting pipe 401-7 is connected with the annular heating pipe 401-3, and the other end is connected with the movable boss 401-6; the roller 402 comprises a fixing bolt 402-1, a fixing plate 402-2, an end cover 402-5, a bearing II 402-4 and a rotary support frame 402-3; the fixing plates 402-2 are connected to two sides above the second support frame 403 and used for mounting the rollers 402; the end cover 402-5 is connected to the fixing plate 402-2; the rotating shaft of the rotating support frame 402-3 is connected with a motor III 406, and four support end surfaces are connected with the wall surface of the roller 402 and used for supporting the roller 402 to rotate; the bottom surface of the support frame II 403 is fixed in the middle of the bottom plate 101 and is aligned with the support frame I201; the ultraviolet lamp baffle plate 405 is positioned at the outermost side, a through hole is formed in the middle, and an arc ultraviolet lamp 407 is connected inside the ultraviolet lamp baffle plate; the receiving cloth 408 is used to receive the spray and form the film 309.
The invention provides a method for preparing an electrostatic spray film cured by photo-thermal, which comprises the following specific implementation steps:
step one, mounting the photo-thermal curing unit 4 and the film collecting unit 2 on a bottom plate 101, adjusting the distance between the photo-thermal curing unit 4 and the film collecting unit 2 to be 40-60 mm, and fixing a guide rail II 304 on a stand column 102 for supporting and connecting a mounting plate 307;
step two, mixing and stirring polyurethane acrylic resin, photoinitiator diphenyl iodonium salt, deionized water and additives according to a certain mass ratio to prepare uniformly dispersed electrostatic photo-thermal curing mixed liquor, and storing the mixed liquor in a liquid storage cylinder 308;
step three, connecting one end of an electrode wire I311 with the anode of the high-voltage electrostatic generator 310, connecting the other end of the electrode wire I311 with the annular electrode 303, connecting one end of an electrode wire II 312 with the cathode of the high-voltage electrostatic generator 310, and connecting the other end of the electrode wire II 312 with the nozzle 302;
step four, adjusting the positions of 8 annular heating pipes 401-3, starting the heating device 401, adjusting the distance between 2 nozzles 302 to control the width of the film 309, and starting the high-voltage electrostatic generator 310 and the micro-injection pump 306;
step five, after the spraying is stable, starting a motor III 406 and a motor I206, and turning on an arc ultraviolet lamp 407;
and step six, when the film 309 is collected, turning off the micro-injection pump 306, turning off the arc ultraviolet lamp 407 and the heating device 401, turning off the motor III 406 and the motor I206, and removing the film 309.
The contents of the embodiments in the present specification are only illustrations of implementation forms of the inventive concept, and are not intended to limit the present invention, and various changes can be made by those skilled in the art according to the technical solutions and concepts described above. Therefore, it is intended that all technical equivalents and modifications equivalent to those skilled in the art according to the present invention shall fall within the scope of the claims.

Claims (8)

1. A method and a device for preparing a photo-thermal curing electrostatic spray film are characterized by comprising a device supporting unit, a film collecting unit, an electrostatic spray unit and a photo-thermal curing unit;
the device supporting unit comprises a bottom plate, a stand column, a cross beam and a guide rail I; the bottom plate is connected with a support frame I, a support frame II, an upright post and a high-voltage electrostatic generator; the upright columns are symmetrically distributed on two sides of the bottom plate, and the upper part of the upright columns is connected with a cross beam for supporting and connecting the electrostatic spraying unit; the upper part of the cross beam is provided with two parallel grooves;
the film collecting unit comprises a support frame I, a roller II, a bearing seat, a bearing I, a motor I, a coupler and a belt; the bottom surface of the support frame I is fixed on the bottom plate; the roller I is positioned on the upper layer of the support frame I and used for releasing the receiving cloth; the roller II is positioned at the lower layer of the support frame I and is used for rolling the receiving cloth; the bearing seats are connected to the front end and the rear end of the support frame I and are used for supporting the roller I and the roller II; one end of the belt is positioned on the roller I shaft, the other end of the belt is positioned on the roller II shaft, and the belt is driven by the motor I to achieve the purpose of synchronous rotation;
the electrostatic spraying unit comprises a push rod, a nozzle, a movable plate, a micro-injection pump, a liquid storage cylinder, a mounting plate, a film, a guide rail II, an annular electrode, a high-voltage electrostatic generator, an electrode wire I and an electrode wire II; the push rod is connected to the upright post and connected with the moving plate, and provides thrust for adjusting the distance between the N nozzles; the number of the nozzles is N; the front surface of the moving plate is connected with the mounting plate and used for fixing the nozzle, and the side surface of the moving plate is provided with two through holes and used for connecting a guide rail II; the liquid storage cylinder is used for storing the electrostatic photo-thermal curing mixed liquid; the mounting plate is used for mounting the nozzle; two ends of the guide rail II are connected with the upright post, and the middle of the guide rail II penetrates through the through hole in the movable plate to play a role in supporting and guiding; the high-voltage electrostatic generator is positioned on the bottom plate; one end of the electrode wire I is connected with the anode of the high-voltage electrostatic generator, and the other end of the electrode wire I is connected with the annular electrode; one end of the electrode wire II is connected with the negative electrode of the high-voltage electrostatic generator, and the other end of the electrode wire II is connected with the nozzle;
the photo-thermal curing unit comprises a heating device, a roller, a support frame II, a support plate, an ultraviolet lamp baffle, a motor III, an arc ultraviolet lamp, receiving cloth and an ultraviolet lamp fixing bolt; the heating device comprises a synchronous belt wheel, a synchronous belt, an annular heating pipe, a motor II, a gear, a movable boss, a connecting pipe and a heating wire; the number of the annular heating pipes is NX; the motor II is connected with a gear, drives a synchronous belt pulley to rotate and is used for adjusting the position of the annular heating pipe; one end of the connecting pipe is connected with the annular heating pipe, and the other end of the connecting pipe is connected with the movable lug boss; the roller comprises a fixing bolt, a fixing plate, an end cover, a bearing II and a rotary support frame; the fixed plates are connected to two sides above the support frame II and used for mounting the roller; the end cover is connected to the fixing plate; a rotating shaft of the rotating support frame is connected with a motor III, and four support end surfaces are connected with the wall surface of the roller and used for supporting the roller to rotate; the bottom surface of the support frame II is fixed in the middle of the bottom plate and is aligned with the support frame I; the ultraviolet lamp baffle is positioned at the outermost side, the middle of the ultraviolet lamp baffle is provided with a through hole, and the interior of the ultraviolet lamp baffle is connected with an arc ultraviolet lamp; the receiving cloth is used for receiving the spray and then forming a film.
2. The method and apparatus for preparing a photo-thermal curing electrostatic spray film according to claim 1, wherein the number of the nozzles is N, and the inner diameter is 0.2 to 0.8 mm; the adjusting distance of the push rod is 0-200 mm; when the annular heating pipe is installed, the annular heating pipe is concentric with the wall surface of the roller, the heating range is the whole wall surface of the roller, and the adjusting distance is 0-130 mm.
3. The method and apparatus for preparing a photo-thermal cured electrostatic spray film according to claim 1, wherein the liquid storage cylinder contains an electrostatic photo-thermal curing mixed liquid, the electrostatic photo-thermal curing mixed liquid comprises polyurethane acrylic resin, photoinitiator diphenyl iodonium salt, deionized water and additives, and the mass fractions of the four components are 32% -35%, 28% -32%, 18% -20% and 13% -22%, respectively.
4. The method and the device for preparing the photo-thermal curing electrostatic spray film according to claim 1, wherein a heating wire is embedded in the annular heating pipe, and the inner diameter of the heating wire ranges from 120 mm to 150 mm; the number of the annular heating pipes is NX, X is the number of the annular heating pipes required by the working of a single nozzle, and the range of X is 1-M.
5. The method and apparatus for preparing a photo-thermal curing electrostatic spray film according to claim 1, wherein the rotating shaft of the rotating support frame is connected to a motor III, and four support end surfaces are in the same arc shape with the wall surface of the drum, and the arc length is 3-10 mm.
6. The method and apparatus for preparing a photo-thermal curing electrostatic spray film according to claim 1, wherein the arc ultraviolet lamps are uniformly distributed on the arc surface, the arc surface is concentric with the wall surface of the drum, the arc length is 200-300 mm, so that the film can be uniformly and rapidly photo-cured when passing through the ultraviolet lamp area, and two threaded holes are formed in the middle for connecting with the ultraviolet lamp baffle.
7. A method for preparing a photo-thermal curing electrostatic spray film is characterized by comprising the following steps:
the method comprises the following steps that firstly, a photo-thermal curing unit and a film collecting unit are installed on a bottom plate, the distance between the photo-thermal curing unit and the film collecting unit is adjusted to be 40-60 mm, and a guide rail II is fixed on an upright post and used for supporting and connecting an installation plate;
step two, mixing and stirring the polyurethane acrylic resin, the photoinitiator diphenyl iodonium salt, the deionized water and the additive according to a certain mass ratio to prepare uniformly dispersed electrostatic photo-thermal curing mixed solution, and storing the mixed solution in a liquid storage cylinder;
connecting one end of an electrode wire I with the anode of a high-voltage electrostatic generator, connecting the other end of the electrode wire I with an annular electrode, connecting one end of an electrode wire II with the cathode of the high-voltage electrostatic generator, and connecting the other end of the electrode wire II with a nozzle;
adjusting the positions of NX annular heating pipes, starting a heating device, adjusting the distance between N nozzles to control the width of the film, and starting a high-voltage electrostatic generator and a micro-injection pump;
step five, starting a motor III and a motor I after the spraying is stable, and opening an arc ultraviolet lamp;
and step six, when the film collection is finished, turning off the micro-injection pump, turning off the arc ultraviolet lamp and the heating device, turning off the motor III and the motor I, and taking down the film.
8. The method of claim 7, wherein the specific opening number of the N nozzles and the NX annular heating pipes can be adjusted simultaneously in the fourth step to obtain a film with a specific area.
CN202210274873.6A 2022-03-21 2022-03-21 Method and device for preparing photo-thermal curing electrostatic spray film Active CN114589021B (en)

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