A coating device for processing PLA degradable paper cups

Abstract

The present invention relates to the technical field of paper cup processing, in particular to a coating device for processing PLA degradable paper cups, comprising a conveying frame, two conveying rollers are arranged at both ends of the conveying frame, a placing plate is fixedly connected to the inside of the conveying frame, the top surface of the placing plate and the top of the conveying roller below are located on the same horizontal line, an intermittent conveying mechanism is connected to the conveying roller, a tensioning mechanism is connected to the conveying frame, a coating plate is fixedly connected to the top of the conveying frame, the coating plate is located above the placing plate, and two arc grooves are provided on the top of the coating plate; the present invention distributes polyethylene plastic coating in a fan-shaped area on one side of wood pulp paper, thereby effectively reducing the distribution of polyethylene plastic coating in the waste area of ​​wood pulp paper when the wood pulp paper is cut into a fan-shaped contour, thereby reducing the waste of polyethylene plastic coating and reducing the processing cost of paper cups.

Description

Technical Field

[0001] The invention relates to the technical field of paper cup processing, and in particular to a coating device for processing PLA degradable paper cups. Background Art

[0002] Polylactic acid (PLA) is a new type of biodegradable material. It is made from starch raw materials extracted from renewable plant resources, which are saccharified to obtain glucose, and then fermented with glucose and certain strains of bacteria to produce high-purity lactic acid. Finally, polylactic acid of a certain molecular weight is synthesized through chemical synthesis.

[0003] The patent document with publication number CN118065176A discloses a coating device and process for processing heat-resistant coated paper cups, including a first supporting platform and a second supporting platform, the first supporting platform and the second supporting platform are arranged at ninety degrees, an automatic cutting device is arranged between the first supporting platform and the second supporting platform, a first conveyor belt assembly is rotatably connected inside the first supporting platform, the output end of the first transport motor is rotatably connected to the first supporting platform, the through end of the first transport motor is fixedly connected to one of the drive rollers of the first conveyor belt assembly, and a coating mechanism is installed on the top of the first supporting platform.

[0004] In the prior art, when processing paper cups, a polyethylene plastic coating is usually added to a single layer of long wood pulp paper, and a plurality of fan-shaped contours are cut out on the wood pulp paper, so that the fan-shaped contours are rolled up and pressed to form a paper cup body. When processing the paper cup body, the single layer of the long wood pulp paper is coated with a polyethylene plastic coating, but when the wood pulp paper is cut into fan-shaped contours, only the fan-shaped contour area used to make the paper cup body needs to be coated, which causes a waste of the polyethylene plastic coating and increases the processing cost of the paper cup. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a coating device for processing PLA degradable paper cups.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a coating device for processing PLA degradable paper cups, comprising a conveying frame, two conveying rollers are arranged at both ends of the conveying frame, a placing plate is fixedly connected to the inside of the conveying frame, the top surface of the placing plate and the top of the conveying roller below are located on the same horizontal line, an intermittent conveying mechanism is connected to the conveying roller, and a tensioning mechanism is connected to the conveying frame;

[0007] A coating plate is fixedly connected to the top of the conveying rack, and the coating plate is located above the placing plate. Two arc grooves are provided on the top of the coating plate, and sliders are slidably connected inside the arc grooves. The two sliders are respectively located inside the adjacent ends of the two arc grooves. A first scraper is arranged below the slider, and a driving displacement mechanism is connected to the slider. A lifting and cleaning mechanism is connected to the first scraper, and a spray coating mechanism is connected to the conveying rack.

[0008] Preferably, the intermittent conveying mechanism includes four connecting shafts, which are respectively fixedly connected to the corresponding conveying rollers and rotatably connected to the inside of the conveying frame, one end of the connecting shaft is fixedly connected to a gear, and two adjacent gears are meshed with each other. Two supporting frames are fixedly connected to the bottom of the conveying frame, and a first motor is fixedly installed on the supporting frame. The output shaft of the first motor and one end of the corresponding connecting shaft are fixedly connected to a transmission wheel, and a transmission belt is connected between two adjacent transmission wheels.

[0009] Preferably, the tensioning mechanism includes a mounting frame, the mounting frame is fixedly connected to the inside of the conveying frame, the mounting frame is slidably connected to a U-shaped movable frame inside, the U-shaped movable frame is rotatably connected to a rotating shaft inside, a contact roller is fixedly connected to the rotating shaft, and a first hydraulic cylinder is fixedly installed on the top of the mounting frame, the piston shaft of the first hydraulic cylinder passes through the mounting frame and extends to the inside of the mounting frame and is then fixedly connected to the top of the U-shaped movable frame.

[0010] Preferably, the driving displacement mechanism includes two sliding bars and two round pins, the two sliding bars are slidably connected to the top of the film-coated plate, the sliding bars are provided with bar grooves, the two round pins are respectively fixedly connected to the tops of the two sliding blocks, the round pins are respectively located in the corresponding bar grooves, the top of the film-coated plate is rotatably connected to a bidirectional lead screw, the top of the sliding bars are fixedly connected to a first connecting ring, the first connecting ring is threadedly connected to the bidirectional lead screw, a second motor is fixedly installed on the top of the film-coated plate, and the output shaft of the second motor is fixedly connected to one end of the bidirectional lead screw.

[0011] Preferably, the spray coating mechanism includes a sealing tube, which is fixedly connected to the top of the conveying frame, and four spray tubes are arranged at the bottom of the sealing tube, and a movable connecting mechanism is connected between the sealing tube and the corresponding spray tubes, and an electric-controlled nozzle is fixedly installed at the bottom of the spray tube, and a liquid storage tank is fixedly connected to one side of the conveying frame, and a liquid pump is fixedly installed on the liquid storage tank, and the liquid inlet end of the liquid pump is fixedly connected to the bottom of one side of the liquid storage tank, and the liquid outlet end of the liquid pump is fixedly connected to one end of the sealing tube, and the four spray tubes are respectively located at the two ends of one side of the two arc-shaped grooves, and the sealing tube is connected to a matching spray mechanism.

[0012] Preferably, the cooperative spray mechanism includes four signal receivers, and the four signal receivers are fixedly installed on one side of the sealing tube close to the coating plate, and the signal receivers are respectively located above the corresponding spray pipes. A signal transmitter is fixedly installed on one end of the two sliding bars close to the sealing tube, and the signal transmitter and the signal receiver are located at the same height.

[0013] Preferably, the lifting and cleaning mechanism includes two rectangular frames, the two rectangular frames are respectively fixedly connected to the bottom of the two sliding blocks and are located above the corresponding first scraper, the top of the first scraper is fixedly connected to two first limit pins, the first limit pins are slidably inserted on the corresponding rectangular frames, the bottom of the coating plate is fixedly connected to two fixing bars, the two fixing bars are fixedly connected with arc-shaped limit bars, the first scrapers are slidably inserted on the corresponding arc-shaped limit bars, the ends of the two arc-shaped limit bars away from each other are provided with arc-shaped matching bars, the ends of the two arc-shaped matching bars away from each other are fixedly connected with a lifting block, the lifting block is slidably inserted with two second limit pins, the second limit pins are fixedly connected to the bottom of the coating plate, and two second hydraulic cylinders are fixedly installed on the top of the coating plate, and the piston shafts of the second hydraulic cylinders pass through the coating plate and extend to the coating plate The cam-shaped limit bar and the cam-shaped matching bar are coaxially arranged with the corresponding cam-shaped groove, and a connecting plate is arranged at the bottom of the connecting plate, and fixed brackets are fixedly connected to the bottom of the coating plate. An arc cleaning block is arranged on one side adjacent to the two connecting plates, and a wiping cotton is fixedly installed in the arc surface of the top of the arc cleaning block. Slide grooves are provided on the two connecting plates, and movable bars are fixedly connected to the movable bars, and the movable bars are slidably connected to the corresponding slide grooves. The connecting plates are rotatably connected with connecting screws, and the movable bars are fixedly connected to a second connecting ring, and the connecting screws are respectively threadedly connected to the corresponding second connecting rings. A third motor is fixedly installed on the connecting plate, and the output shaft of the third motor is fixedly connected to one end of the corresponding connecting screw.

[0014] Preferably, the conveying frame is internally rotatably connected with a mounting shaft, the mounting shaft is located on the side of the coating plate away from the sealing tube, two second scrapers are fixedly connected to the surface of the mounting shaft along the circumferential direction, and a fourth motor is fixedly installed on one side of the conveying frame, and the output shaft of the fourth motor is fixedly connected to one end of the mounting shaft.

[0015] Preferably, the movable connecting mechanism includes a first spherical shell and a connecting tube, the first spherical shell is fixedly connected to the top of the spray pipe, the connecting tube is fixedly connected to the bottom of the sealing tube, the bottom of the connecting tube is fixedly connected to a second spherical shell, the first spherical shell is slidingly sealed inside the second spherical shell, a liquid inlet is provided on the top of the first spherical shell, a first rotating ring is fixedly connected to one side of the spray pipe, a third hydraulic cylinder is fixedly installed on the bottom of the sealing tube, a second rotating ring is fixedly connected to the piston shaft of the third hydraulic cylinder, a movable ring is arranged between the first rotating ring and the second rotating ring, and both ends of the movable ring are rotatably connected to the first rotating ring and the second rotating ring respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The two sliders are moved along the corresponding arc grooves by driving the displacement mechanism, thereby driving the corresponding first scraper to move in an arc shape, and the sprayed polyethylene plastic coating is scraped in an arc shape, so that the polyethylene plastic coating is distributed in a fan shape on the top surface of the wood pulp paper, and after the first scraper is scraped, the spray coating mechanism continues to spray the polyethylene plastic coating at the next scraping position, so that after the next movement of the wood pulp paper is paused, the first scraper moves in the opposite direction and continues to move and scrape, so that the polyethylene plastic coating is distributed in a fan-shaped area on one side of the wood pulp paper, so that when the wood pulp paper is cut into a fan-shaped contour, the distribution of the polyethylene plastic coating in the waste area of ​​the wood pulp paper is effectively reduced, thereby reducing the waste of the polyethylene plastic coating and reducing the processing cost of the paper cup.

[0018] 2. When the two sliding bars are moving away from each other, the bar groove limits the circular pin, so that the two sliders move away from each other along the corresponding arc groove, and drive the corresponding first scraper to move and scrape the polyethylene plastic coating, so that the polyethylene plastic coating is scraped evenly and maintains a fan-shaped area distribution. Similarly, when the output shaft of the second motor rotates in the opposite direction, the two sliders approach each other along the corresponding arc groove, and the two first scrapers approach each other and scrape in the opposite direction.

[0019] 3. The controller connected to the signal receiver controls the corresponding electric-controlled nozzle to spray the polyethylene plastic coating outward, and the wood pulp paper is moved and transported during the process of the electric-controlled nozzle spraying the polyethylene plastic coating outward. When the sliding bar moves and drives the two sliders away from each other, the signal transmitters on the two sliding bars face the two signal receivers at one side of the spray pipe away from the center position after the movement is completed, so that the two electric-controlled nozzles at the bottom of the spray pipe away from the center position spray the polyethylene plastic coating outward, and at the same time the wood pulp paper continues to move and transport, so that the electric-controlled nozzle can perform corresponding spraying according to the movement of the first scraper.

[0020] 4. The piston shaft of the second hydraulic cylinder moves in the opposite direction and the arc-shaped matching strip is re-joined with the corresponding arc-shaped limit strip. The first scraper returns to the initial height and continues to limit the height through the arc-shaped matching strip and the arc-shaped limit strip. When the first scraper is cleaned again, the output shaft of the third motor rotates in the opposite direction to return the arc surface cleaning block to the initial position, thereby performing reverse cleaning on the bottom of the first scraper.

[0021] 5. The liquid spray pipe moves with the movement of the piston shaft of the third hydraulic cylinder, and at the same time, the first spherical shell on the top of the liquid spray pipe moves inside the second spherical shell, thereby adjusting the spraying direction of the electric-controlled nozzle. During the movement of the wood pulp paper, the electric-controlled nozzle continuously adjusts the spraying position according to the inclination direction of the first scraper, so that when the polyethylene plastic coating sprayed on the surface of the wood pulp paper moves to one side of the first scraper, the inclination direction of the polyethylene plastic coating during spraying is aligned with one side of the first scraper, thereby preventing coating gaps when the first scraper performs fan-shaped scraping and ensuring the coverage of the polyethylene plastic coating during scraping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a first structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the structure at B in FIG.

[0025] Figure 4 It is a second structural schematic diagram of the present invention;

[0026] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at position C in FIG.

[0027] Figure 6 It is a schematic diagram of the matching structure of the sealing tube, the electric-controlled nozzle and the signal receiver of the present invention (the liquid spraying tube, the first spherical shell, the connecting tube and the second spherical shell on one side are cut);

[0028] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at D in FIG.

[0029] Figure 8 This is a schematic structural diagram of a film-coated plate according to the present invention from a first viewing angle;

[0030] Fig. 9 For the present invention Figure 8 A schematic diagram of the structure at position E in FIG.

[0031] Fig.10 This is a schematic structural diagram of the coated plate of the present invention from a second viewing angle;

[0032] Fig.11 For the present invention Fig.10 A magnified schematic diagram of the structure at F in FIG.

[0033] Fig.12 It is a schematic structural diagram of the coated board of the present invention from a third viewing angle.

[0034] In the figure: 1, conveying frame; 2, conveying roller; 3, placing plate; 4, coating plate; 5, arc groove; 6, slider; 7, first scraper; 8, connecting shaft; 9, gear; 10, support frame; 11, first motor; 12, transmission wheel; 13, transmission belt; 14, mounting frame; 15, U-shaped movable frame; 16, rotating shaft; 17, contact roller; 18, first hydraulic cylinder; 19, sliding bar; 20, round pin; 21, strip groove; 22, two-way lead screw; 23, first connecting ring; 24, second motor; 25, sealing tube; 26, spray pipe; 27, electronically controlled spray head; 28, liquid storage tank; 29, liquid pump; 30, signal receiver; 31, signal transmitter; 3 2. Rectangular frame; 33. First limit pin; 34. Fixed bar; 35. Arc limit bar; 36. Arc matching bar; 37. Lifting block; 38. Second limit pin; 39. Second hydraulic cylinder; 40. Connecting plate; 41. Fixed bracket; 42. Arc cleaning block; 43. Wiping cotton; 44. Slide; 45. Movable bar; 46. Connecting screw; 47. Second connecting ring; 48. Third motor; 49. Mounting shaft; 50. Second scraper; 51. Fourth motor; 52. First spherical shell; 53. Connecting pipe; 54. Second spherical shell; 55. Liquid inlet; 56. First rotating ring; 57. Third hydraulic cylinder; 58. Second rotating ring; 59. Movable ring. DETAILED DESCRIPTION

[0035] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0036] like Figures 1 to 12 A coating device for processing PLA degradable paper cups shown in the figure comprises a conveying frame 1, two conveying rollers 2 are arranged at both ends of the conveying frame 1, a placing plate 3 is fixedly connected to the inside of the conveying frame 1, the top surface of the placing plate 3 and the top of the conveying roller 2 below are located at the same horizontal line, an intermittent conveying mechanism is connected to the conveying roller 2, and a tensioning mechanism is connected to the conveying frame 1;

[0037] The top of the conveying frame 1 is fixedly connected with a coating plate 4, which is located above the placing plate 3. The top of the coating plate 4 is provided with two arc grooves 5, and the inside of the arc groove 5 is slidably connected with a slider 6. The two sliders 6 are respectively located inside the adjacent ends of the two arc grooves 5. A first scraper 7 (such as Fig.10 As shown in the figure, the slider 6 is connected to a driving displacement mechanism, the first scraper 7 is connected to a lifting and cleaning mechanism, and the conveying frame 1 is connected to a spray coating mechanism; when working, in the prior art, when processing paper cups, a polyethylene plastic coating is usually added to a long strip of wood pulp paper, and a plurality of fan-shaped contours are cut out on the wood pulp paper, so that the fan-shaped contours are rolled up and pressed to form a paper cup body. When processing the paper cup body, the long strip of wood pulp paper is coated with a polyethylene plastic coating, but when the wood pulp paper is cut into fan-shaped contours, only the plastic coating used to make the paper cup body is used. The fan-shaped contour area needs to be coated, which causes a waste of polyethylene plastic coating and increases the processing cost of paper cups. The technical solution can solve the above problems. The specific working method is as follows: one end of the long strip of wood pulp paper for coating passes between two adjacent conveying rollers 2, and passes between the other two adjacent conveying rollers 2 along the top of the placement plate 3, and then the wood pulp paper inside the conveying frame 1 is kept in a tensioned state through the action of the tensioning mechanism, so that the wood pulp paper above the placement plate 3 is horizontally attached to the top surface of the placement plate 3, and the wood pulp paper on the placement plate 3 is horizontally attached to the top surface of the placement plate 3. The function of the intermittent conveying mechanism enables the conveying roller 2 to drive the wood pulp paper to be conveyed intermittently in one direction, and in the process of conveying, the polyethylene plastic coating is sprayed on the top surface of the wood pulp paper through the function of the spray coating mechanism, and the position where the wood pulp paper is sprayed with the polyethylene plastic coating moves to the first scraper 7, and the conveying of the wood pulp paper is suspended, and then the two sliders 6 are moved along the corresponding arc groove 5 through the function of the driving displacement mechanism, thereby driving the corresponding first scraper 7 to move in an arc shape, and the sprayed polyethylene plastic coating is scraped in an arc shape, so that the polyethylene plastic coating is distributed in a fan shape on the top surface of the wood pulp paper, and after the first scraper 7 is scraped, the spray coating mechanism continues to spray the polyethylene plastic coating at the next scraping position, so that after the next movement of the wood pulp paper is paused, the first scraper 7 moves in the opposite direction and continues to move and scrape, so that the polyethylene plastic coating is distributed in a fan-shaped area on one side of the wood pulp paper, so that when the wood pulp paper is cut into a fan-shaped contour, the distribution of the polyethylene plastic coating in the waste area of ​​the wood pulp paper is effectively reduced, thereby reducing the waste of the polyethylene plastic coating and reducing the processing cost of the paper cup.

[0038] As a further embodiment of the present invention, the intermittent conveying mechanism includes four connecting shafts 8, which are respectively fixedly connected to the inside of the corresponding conveying rollers 2 and rotatably connected to the inside of the conveying frame 1. One end of the connecting shaft 8 is fixedly connected to a gear 9, and two adjacent gears 9 are meshed with each other. The bottom of the conveying frame 1 is fixedly connected to two support frames 10, and the support frames 10 are fixedly installed with a first motor 11. The output shaft of the first motor 11 and one end of the corresponding connecting shaft 8 are fixedly connected to a transmission wheel 12, and a transmission belt 13 is connected between two adjacent transmission wheels 12; when working The output shafts of the two first motors 11 rotate in the same direction, so that the transmission wheels 12 on the two output shafts rotate in the same direction, and through the transmission action of the transmission belt 13, the transmission wheels 12 on the corresponding connecting shafts 8 rotate in coordination, and through the meshing transmission of the two adjacent gears 9, the two adjacent connecting shafts 8 drive the corresponding conveying rollers 2 to rotate in opposite directions, and clamp and convey the long strips of wood pulp paper, so that the long strips of wood pulp paper move unidirectionally, and through the intermittent rotation of the first motor 11, the long strips of wood pulp paper are periodically intermittently conveyed during the unidirectional conveying process.

[0039] As a further embodiment of the present invention, the tensioning mechanism includes a mounting frame 14, the mounting frame 14 is fixedly connected to the inside of the conveying frame 1, the mounting frame 14 is slidably connected to a U-shaped movable frame 15, the U-shaped movable frame 15 is rotatably connected to a rotating shaft 16, the rotating shaft 16 is fixedly connected to a contact roller 17, and a first hydraulic cylinder 18 is fixedly installed on the top of the mounting frame 14, the piston shaft of the first hydraulic cylinder 18 passes through the mounting frame 14 and extends to the inside of the mounting frame 14 and is fixedly connected to the top of the U-shaped movable frame 15; when working, the adjacent connecting shafts 8 rotate in opposite directions, driving the corresponding conveying rollers 2 to rotate, so that one end of the long strip of wood pulp paper can enter between the two conveying rollers 2, and move and convey as the two conveying rollers 2 rotate in opposite directions After one end of the long strip of wood pulp paper passes through the conveying rollers 2 at both ends of the conveying frame 1 in turn, the contact roller 17 is located above the top surface of the long strip of wood pulp paper, and moves downward through the piston axis of the first hydraulic cylinder 18, and drives the U-shaped movable frame 15 to move downward along the sliding connection of the mounting frame 14, so that the contact roller 17 inside the U-shaped movable frame 15 contacts the top surface of the long strip of wood pulp paper, and keeps the long strip of wood pulp paper in a tensioned state during the descent. As the contact roller 17 is pressed by the contact, the long strip of wood pulp paper is tightened, and the wood pulp paper is horizontally attached to the top surface of the placement plate 3. When the wood pulp paper is moved and conveyed, the contact roller 17 drives the rotating shaft 16 to rotate along the rotating connection of the U-shaped movable frame 15 through the contact friction force.

[0040] As a further implementation scheme of the present invention, the driving displacement mechanism includes two sliding bars 19 and two round pins 20, the two sliding bars 19 are slidably connected to the top of the coating plate 4, the sliding bars 19 are provided with strip grooves 21, the two round pins 20 are respectively fixedly connected to the tops of the two sliders 6, the round pins 20 are respectively located in the corresponding strip grooves 21, the top of the coating plate 4 is rotatably connected to a bidirectional lead screw 22, the top of the sliding bars 19 are fixedly connected to a first connecting ring 23, the first connecting ring 23 is threadedly connected to the bidirectional lead screw 22, the top of the coating plate 4 is fixedly installed with a second motor 24, and the output shaft of the second motor 24 is fixedly connected to one end of the bidirectional lead screw 22; when working, the output shaft of the second motor 24 is connected to one end of the bidirectional lead screw 22. The rotation of the output shaft drives the bidirectional lead screw 22 to rotate, and through the threaded connection between the bidirectional lead screw 22 and the two first connecting rings 23, the two first connecting rings 23 drive the corresponding sliding bars 19 to move away from each other along the sliding connection. In the process of the two sliding bars 19 moving away from each other, the two sliders 6 move away from each other along the corresponding arc grooves 5 through the limiting effect of the strip grooves 21 on the circular pins 20, and drive the corresponding first scrapers 7 to move and scrape the polyethylene plastic coating, so that the polyethylene plastic coating is scraped evenly and maintains a fan-shaped area distribution. Similarly, when the output shaft of the second motor 24 rotates in the opposite direction, the two sliders 6 approach each other along the corresponding arc grooves 5, and the two first scrapers 7 approach each other and perform reverse scraping.

[0041] As a further embodiment of the present invention, the spray coating mechanism includes a sealing tube 25, which is fixedly connected to the top of the conveying frame 1, and four spray pipes 26 are arranged at the bottom of the sealing tube 25. A movable communication mechanism is connected between the sealing tube 25 and the corresponding spray pipes 26. The bottom ends of the spray pipes 26 are fixedly installed with electric control nozzles 27. A liquid storage tank 28 is fixedly connected to one side of the conveying frame 1, and a liquid pump 29 is fixedly installed on the liquid storage tank 28. The liquid inlet end of the liquid pump 29 is fixedly connected to the bottom of one side of the liquid storage tank 28, and the liquid outlet end of the liquid pump 29 is fixedly connected to one end of the sealing tube 25. The four spray pipes 26 are respectively located at the two ends of one side of the two arc grooves 5, and a matching spray mechanism is connected to the sealing tube 25. When working, the polyethylene plastic coating inside the liquid storage tank 28 is pumped into the inside of the sealing tube 25 by the liquid pump 29. When the two sliders 6 are respectively located at the adjacent ends of the two arc grooves 5, the bottom of the sealing tube 25 is close to the bottom of the sealing tube 25 through the action of the matching spray mechanism. The two electrically controlled nozzles 27 near the center position spray the polyethylene plastic coating outward, and after the movement of the wood pulp paper is paused, the sprayed polyethylene plastic coating is respectively located on the side where the two first scrapers 7 are away from each other, and the polyethylene plastic coating is moved and scraped in the process of the two first scrapers 7 moving away from each other. After the scraping is completed, the two sliders 6 are respectively located at one end away from each other inside the two arc grooves 5, and continue to cooperate with the spraying mechanism to make the two electrically controlled nozzles 27 at the bottom of the sealing tube 25 away from the center position spray the polyethylene plastic coating outward, so that after the wood pulp paper continues to move and pause, the sprayed polyethylene plastic coating is respectively located on the side adjacent to the two first scrapers 7, so that when the two first scrapers 7 move in the opposite direction and approach each other, the polyethylene plastic coating continues to be scraped in the opposite direction, thereby performing reciprocating arc scraping, and spraying the coating at the corresponding position according to the movement of the first scraper 7 to ensure the accuracy of the polyethylene plastic coating scraping position.

[0042] As a further embodiment of the present invention, the spray mechanism includes four signal receivers 30, which are fixedly mounted on one side of the sealing tube 25 close to the coating plate 4, and the signal receivers 30 are respectively located above the corresponding liquid spraying tubes 26. The ends of the two sliding bars 19 close to the sealing tube 25 are fixedly mounted with signal transmitters 31, and the signal transmitters 31 and the signal receivers 30 are located at the same height. When working, when the two sliders 6 are respectively located at the adjacent ends inside the two arc-shaped grooves 5, the two sliding bars 19 are located at the adjacent ends of the tops of the two arc-shaped grooves 5 through the limiting effect of the strip grooves 21 on the circular pins 20, so that the signal transmitters 31 on the two sliding bars 19 are directly opposite to the two signal receivers near the center position on one side of the liquid spraying tube 26. The signal transmitter 31 is connected to the signal receiver 30, and after the two signal receivers 30 receive the signal sent by the signal transmitter 31, the controller connected to the signal receiver 30 controls the corresponding electric-controlled nozzle 27 to spray the polyethylene plastic coating outward, and the wood pulp paper is moved and transported during the process of the electric-controlled nozzle 27 spraying the polyethylene plastic coating outward. When the sliding bar 19 moves and drives the two sliders 6 away from each other, the signal transmitters 31 on the two sliding bars 19 face the two signal receivers 30 on one side of the spray pipe 26 away from the center position after the movement is completed, so that the two electric-controlled nozzles 27 at the bottom of the spray pipe 26 away from the center position spray the polyethylene plastic coating outward, and at the same time, the wood pulp paper continues to move and transport, so that the electric-controlled nozzle 27 can perform corresponding spraying according to the movement of the first scraper 7.

[0043] As a further embodiment of the present invention, the lifting cleaning mechanism includes two rectangular frames 32, which are respectively fixedly connected to the bottom of the two sliders 6 and are located above the corresponding first scraper 7. The top of the first scraper 7 is fixedly connected to two first limit pins 33, and the first limit pins 33 are slidably inserted on the corresponding rectangular frames 32. The bottom of the coating plate 4 is fixedly connected to two fixing bars 34 (such as Fig.12 As shown in the figure, the two fixing bars 34 are fixedly connected with arc-shaped limit bars 35, the first scrapers 7 are slidably plugged into the corresponding arc-shaped limit bars 35, the ends of the two arc-shaped limit bars 35 away from each other are provided with arc-shaped matching bars 36, the ends of the two arc-shaped matching bars 36 away from each other are fixedly connected with lifting blocks 37, the lifting blocks 37 are slidably plugged with two second limit pins 38, the second limit pins 38 are fixedly connected to the bottom of the coating plate 4, and the top of the coating plate 4 is fixedly installed with two second hydraulic cylinders 39 (as shown in the figure). Fig. 9As shown in the figure, the piston shafts of the second hydraulic cylinders 39 all penetrate the film-coating plate 4 and extend to the bottom of the film-coating plate 4 and are fixedly connected to the top of the corresponding lifting block 37. The arc-shaped limit strips 35 and the arc-shaped matching strips 36 are coaxially arranged with the corresponding arc-shaped grooves 5. The bottom of the arc-shaped matching strips 36 are provided with connecting plates 40. Both ends of the connecting plates 40 are fixedly connected with fixed brackets 41. The fixed brackets 41 are fixedly connected to the bottom of the film-coating plate 4. The adjacent sides of the two connecting plates 40 are provided with arc surface cleaning blocks 42. The arc surface of the top of the arc surface cleaning block 42 is fixed. A wiping cotton 43 is installed, a slide groove 44 is opened on the two connecting plates 40, and a movable bar 45 is fixedly connected to the arc cleaning block 42, and the movable bar 45 is slidably connected to the corresponding slide groove 44. A connecting screw 46 is rotatably connected to the connecting plate 40, and a second connecting ring 47 is fixedly connected to the movable bar 45. The connecting screw 46 is respectively threadedly connected to the corresponding second connecting ring 47. A third motor 48 is fixedly installed on the connecting plate 40, and the output shaft of the third motor 48 is fixedly connected to one end of the corresponding connecting screw 46;During operation, when the two sliders 6 slide along the corresponding arc groove 5 and move away from each other, the slider 6 drives the corresponding rectangular frame 32 to move synchronously, and the first scraper 7 moves synchronously with the rectangular frame 32 through the sliding insertion of the first limit pin 33. When the first scraper 7 moves, the first scraper 7 is slidably inserted into the arc limit strip 35 so that the vertical height of the first scraper 7 is limited during the movement of the first scraper 7, and when the slider 6 moves to the other end of the arc groove 5, the first scraper 7 moves from the corresponding arc limit The positioning strip 35 moves to the arc-shaped matching strip 36, and the first scraper 7 is located between the corresponding two connecting plates 40 and at one end of the corresponding arc surface cleaning block 42. The piston shaft of the second hydraulic cylinder 39 moves upward, and drives the lifting block 37 to move upward along the sliding insertion of the second limiting pin 38, so that the arc-shaped matching strip 36 moves upward, and drives the first scraper 7 to move upward. The first limiting pin 33 at the top of the first scraper 7 moves upward synchronously along the sliding insertion of the rectangular frame 32. When the first scraper 7 moves upward, The output shaft of the third motor 48 rotates to drive the connecting screw 46 to rotate, and the threaded connection between the connecting screw 46 and the second connecting ring 47 causes the movable bar 45 to slide along the corresponding slide groove 44, thereby driving the arc surface cleaning block 42 to move. The arc surface cleaning block 42 contacts the bottom of the first scraper 7 during the movement, and wipes and cleans the bottom of the first scraper 7 through the wiping cotton 43 in the arc surface of the arc surface cleaning block 42, thereby timely cleaning the coating accumulation generated by the first scraper 7 during the scraping process, reducing the influence of the coating accumulation on the uniformity of the scraping. After the bottom of the first scraper 7 is cleaned, the piston shaft of the second hydraulic cylinder 39 moves in the reverse direction and the arc matching bar 36 is re-connected with the corresponding arc limiting bar 35, the first scraper 7 returns to the initial height and continues to be height-limited by the arc matching bar 36 and the arc limiting bar 35. When the first scraper 7 is cleaned again, the output shaft of the third motor 48 rotates in the reverse direction to return the arc surface cleaning block 42 to the initial position, thereby reversely cleaning the bottom of the first scraper 7. ;

[0044] As a further embodiment of the present invention, the conveying frame 1 is internally rotatably connected with a mounting shaft 49, the mounting shaft 49 is located on the side of the coating plate 4 away from the sealing tube 25, and the surface of the mounting shaft 49 is fixedly connected with two second scrapers 50 along the circumferential direction. A fourth motor 51 is fixedly installed on one side of the conveying frame 1, and the output shaft of the fourth motor 51 is fixedly connected to one end of the mounting shaft 49; when working, after the polyethylene plastic coating is arc-shapedly scraped by the first scraper 7, the wood pulp paper continues to move toward the mounting shaft 49, and the polyethylene plastic coating on the surface of the wood pulp paper is horizontally scraped by the second scraper 50 at the bottom of the mounting shaft 49. When a certain coating protrusion is generated at the end position of the arc-shaped scraping of the first scraper 7, the second scraper 50 is used to scrape the coating protrusion for the second time to further improve the flatness of the polyethylene plastic coating on the surface of the wood pulp paper. The output shaft of the fourth motor 51 is rotated 180 degrees during the pause of the conveying of the wood pulp paper, so that the second scraper 50 at the bottom of the mounting shaft 49 is rotated upward after a certain period of scraping, so that the two second scrapers 50 work alternately, so that the staff can clean the surface of the second scraper 50 that has been scraped for a certain period of time and rotated upward, thereby ensuring the effect of horizontal scraping.

[0045] As a further embodiment of the present invention, the movable connecting mechanism includes a first spherical shell 52 and a connecting pipe 53, the first spherical shell 52 is fixedly connected to the top of the liquid spraying pipe 26, the connecting pipe 53 is fixedly connected to the bottom of the sealing pipe 25, the bottom of the connecting pipe 53 is fixedly connected to the second spherical shell 54, the first spherical shell 52 is slidably sealed inside the second spherical shell 54, a liquid inlet 55 is opened on the top of the first spherical shell 52, a first rotating ring 56 is fixedly connected to one side of the liquid spraying pipe 26, a third hydraulic cylinder 57 is fixedly installed at the bottom of the sealing pipe 25, a second rotating ring 58 is fixedly connected to the piston shaft of the third hydraulic cylinder 57, a movable ring 59 is arranged between the first rotating ring 56 and the second rotating ring 58, and the two ends of the movable ring 59 are rotatably connected to the first rotating ring 56 and the second rotating ring 58 respectively; when working, the polyethylene plastic coating inside the sealing pipe 25 enters the corresponding second spherical shell 54 along the connecting pipe 53, and through the sliding seal of the first spherical shell 52 inside the second spherical shell 54, the polyethylene plastic coating is moved along the first spherical shell 52 The liquid inlet 55 enters the interior of the liquid spraying pipe 26. When the wood pulp paper is being transported, the polyethylene plastic coating is sprayed electrically through the electrically controlled nozzle 27. In the process of the movement of the wood pulp paper, the piston shaft of the third hydraulic cylinder 57 drives the second rotating ring 58 to move, so that the movable ring 59 moves between the second rotating ring 58 and the first rotating ring 56, and drives the first rotating ring 56 to move, so that the liquid spraying pipe 26 moves in coordination with the movement of the piston shaft of the third hydraulic cylinder 57. At the same time, the top of the liquid spraying pipe 26 is moved by the third hydraulic cylinder 57. A spherical shell 52 moves in coordination with the inside of the second spherical shell 54, thereby adjusting the spraying direction of the electric-controlled nozzle 27, so that during the movement of the wood pulp paper, the electric-controlled nozzle 27 continuously adjusts the spraying position according to the inclination direction of the first scraper 7, so that when the polyethylene plastic coating sprayed on the surface of the wood pulp paper moves to one side of the first scraper 7, the inclination direction of the polyethylene plastic coating during spraying is aligned with one side of the first scraper 7, preventing coating gaps from being generated when the first scraper 7 performs fan-shaped scraping, thereby ensuring the coverage of the polyethylene plastic coating during scraping.

[0046] Working principle of the present invention:

[0047] One end of the long strip of wood pulp paper for coating is passed between two adjacent conveying rollers 2, and passed between the other two adjacent conveying rollers 2 along the top of the placing plate 3, and then the wood pulp paper inside the conveying frame 1 is kept in a tensioned state through the action of the tensioning mechanism, so that the wood pulp paper above the placing plate 3 is horizontally attached to the top surface of the placing plate 3, and the conveying roller 2 drives the wood pulp paper to perform unidirectional intermittent conveyance through the action of the intermittent conveying mechanism, and in the process of conveying, the polyethylene plastic coating is sprayed on the top surface of the wood pulp paper through the action of the spray coating mechanism, and the conveying of the wood pulp paper is suspended after the position where the polyethylene plastic coating is sprayed on the wood pulp paper moves to the first scraper 7, and then the two sliding plates are driven by the displacement mechanism. The block 6 moves along the corresponding arc groove 5, thereby driving the corresponding first scraper 7 to move in an arc shape, and scrapes the sprayed polyethylene plastic coating in an arc shape, so that the polyethylene plastic coating is distributed in a fan shape on the top surface of the wood pulp paper, and after the first scraper 7 scrapes, the spray coating mechanism continues to spray the polyethylene plastic coating at the next scraping position, so that after the next movement of the wood pulp paper is paused, the first scraper 7 moves in the opposite direction and continues to move and scrape, so that the polyethylene plastic coating is distributed in a fan-shaped area on one side of the wood pulp paper, so that when the wood pulp paper is cut into a fan-shaped contour, the distribution of the polyethylene plastic coating in the waste area of ​​the wood pulp paper is effectively reduced, thereby reducing the waste of the polyethylene plastic coating and reducing the processing cost of the paper cup.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A coating device for processing PLA degradable paper cups, comprising a conveying frame, characterized in that: Two conveying rollers are arranged at both ends of the conveying frame, a placing plate is fixedly connected to the inside of the conveying frame, the top surface of the placing plate and the top of the conveying roller below are located at the same horizontal line, an intermittent conveying mechanism is connected to the conveying roller, and a tensioning mechanism is connected to the conveying frame; A coating plate is fixedly connected to the top of the conveying frame, the coating plate is located above the placement plate, two arc grooves are provided on the top of the coating plate, sliders are slidably connected inside the arc grooves, the two sliders are respectively located inside the adjacent ends of the two arc grooves, a first scraper is arranged below the slider, a driving displacement mechanism is connected to the slider, a lifting and cleaning mechanism is connected to the first scraper, and a spray coating mechanism is connected to the conveying frame; The driving displacement mechanism includes two sliding bars and two round pins. The two sliding bars are slidably connected to the top of the film-coating plate. The sliding bars are provided with strip grooves. The two round pins are respectively fixedly connected to the tops of the two sliders. The round pins are respectively located in the corresponding strip grooves. The top of the film-coating plate is rotatably connected to a bidirectional lead screw. The top of the sliding bars is fixedly connected to a first connecting ring. The first connecting ring is threadedly connected to the bidirectional lead screw. A second motor is fixedly installed on the top of the film-coating plate. The output shaft of the second motor is fixedly connected to one end of the bidirectional lead screw. The spray coating mechanism includes a sealing tube, which is fixedly connected to the top of the conveying frame, and four liquid spraying tubes are arranged at the bottom of the sealing tube. A movable connecting mechanism is connected between the sealing tube and the corresponding liquid spraying tubes, and an electric-controlled nozzle is fixedly installed at the bottom of each liquid spraying tube. A liquid storage tank is fixedly connected to one side of the conveying frame, and a liquid pump is fixedly installed on the liquid storage tank. The liquid inlet end of the liquid pump is fixedly connected to the bottom of one side of the liquid storage tank, and the liquid outlet end of the liquid pump is fixedly connected to one end of the sealing tube. The four liquid spraying tubes are respectively located at the two ends of one side of the two arc-shaped grooves, and a matching spraying mechanism is connected to the sealing tube; The spray mechanism includes four signal receivers, which are fixedly installed on one side of the sealing tube close to the coating plate. The signal receivers are respectively located above the corresponding spray pipes. Signal transmitters are fixedly installed on one end of the two sliding bars close to the sealing tube, and the signal transmitters and signal receivers are located at the same height.

2. A coating device for processing PLA degradable paper cups according to claim 1, characterized in that: The intermittent conveying mechanism includes four connecting shafts, which are respectively fixedly connected to the corresponding conveying rollers and rotatably connected to the inside of the conveying frame. One end of the connecting shaft is fixedly connected to a gear, and two adjacent gears are meshed with each other. The bottom of the conveying frame is fixedly connected to two supporting frames, and a first motor is fixedly installed on the supporting frames. The output shaft of the first motor and one end of the corresponding connecting shaft are fixedly connected to a transmission wheel, and a transmission belt is connected between the two adjacent transmission wheels.

3. A coating device for processing PLA degradable paper cups according to claim 2, characterized in that: The tensioning mechanism includes a mounting frame, which is fixedly connected to the inside of the conveying frame, the mounting frame is slidably connected to a U-shaped movable frame inside, the U-shaped movable frame is rotatably connected to a rotating shaft inside, a contact roller is fixedly connected to the rotating shaft, and a first hydraulic cylinder is fixedly installed on the top of the mounting frame, the piston shaft of the first hydraulic cylinder passes through the mounting frame and extends to the inside of the mounting frame and is then fixedly connected to the top of the U-shaped movable frame.

4. The coating device for processing PLA degradable paper cups according to claim 1, characterized in that: The lifting and cleaning mechanism includes two rectangular frames, which are respectively fixedly connected to the bottom of the two sliding blocks and are located above the corresponding first scrapers. The tops of the first scrapers are fixedly connected to two first limit pins, which are slidably inserted on the corresponding rectangular frames. The bottom of the film-coating plate is fixedly connected to two fixing bars, and the two fixing bars are fixedly connected with arc-shaped limit bars. The first scrapers are slidably inserted on the corresponding arc-shaped limit bars, and the ends of the two arc-shaped limit bars away from each other are provided with arc-shaped matching bars, and the ends of the two arc-shaped matching bars away from each other are fixedly connected with lifting blocks, and the lifting blocks are slidably inserted with two second limit pins, and the second limit pins are fixedly connected to the bottom of the film-coating plate. Two second hydraulic cylinders are fixedly installed on the top of the film-coating plate, and the piston shafts of the second hydraulic cylinders penetrate the film-coating plate and extend to the film-coating plate. The lower part is fixedly connected to the top of the corresponding lifting block, and the arc limit strip and the arc matching strip are coaxially arranged with the corresponding arc groove. A connecting plate is provided at the bottom of the arc matching strip, and both ends of the connecting plate are fixedly connected to fixed brackets, and the fixed brackets are fixedly connected to the bottom of the coating plate. An arc cleaning block is provided on the adjacent side of the two connecting plates, and a wiping cotton is fixedly installed in the arc surface of the top of the arc cleaning block. Slide grooves are provided on the two connecting plates, and movable bars are fixedly connected to the arc cleaning blocks, and the movable bars are slidably connected to the corresponding slide grooves. Connecting screws are rotatably connected to the connecting plates, and the movable bars are fixedly connected to second connecting rings. The connecting screws are respectively threadedly connected to the corresponding second connecting rings. A third motor is fixedly installed on the connecting plates, and the output shaft of the third motor is fixedly connected to one end of the corresponding connecting screw.

5. A coating device for processing PLA degradable paper cups according to claim 4, characterized in that: The conveying frame is internally rotatably connected with a mounting shaft, which is located on the side of the coating plate away from the sealing tube. Two second scrapers are fixedly connected to the surface of the mounting shaft along the circumferential direction. A fourth motor is fixedly installed on one side of the conveying frame, and the output shaft of the fourth motor is fixedly connected to one end of the mounting shaft.

6. The coating device for processing PLA degradable paper cups according to claim 1, characterized in that: The movable connecting mechanism includes a first spherical shell and a connecting pipe. The first spherical shell is fixedly connected to the top of the liquid spraying pipe, the connecting pipe is fixedly connected to the bottom of the sealing pipe, the bottom of the connecting pipe is fixedly connected to the second spherical shell, the first spherical shell is slidingly sealed inside the second spherical shell, a liquid inlet is opened on the top of the first spherical shell, a first rotating ring is fixedly connected to one side of the liquid spraying pipe, a third hydraulic cylinder is fixedly installed on the bottom of the sealing pipe, a second rotating ring is fixedly connected to the piston shaft of the third hydraulic cylinder, a movable ring is arranged between the first rotating ring and the second rotating ring, and both ends of the movable ring are rotatably connected to the first rotating ring and the second rotating ring respectively.

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