Coating processing device for PET (Polyethylene Terephthalate) plastic sheet

Abstract

The utility model relates to the technical field of plastic sheet processing, in particular to a PET (polyethylene terephthalate) plastic sheet coating processing device, which comprises a plastic sheet, a lower coating mechanism and an upper coating mechanism, the lower coating mechanism comprises a coating box, the coating box is positioned on the lower side of the plastic sheet, the top of the coating box is rotatably connected with a lower coating roller, and the upper coating roller is positioned on the lower side of the plastic sheet. Material rotating wheels are fixed to the two ends of the lower coating roller. The upper coating roller and the lower coating roller drive a plastic sheet to move towards one side and coat the upper surface and the lower surface of the plastic sheet at the same time, the two springs automatically drive the moving frame to move upwards to adjust the height of the upper coating roller, coating processing of the plastic sheets with different thicknesses is met, the moving frame moves upwards to drive the two brush plates to turn over, and the coating efficiency is improved. And the front side face and the rear side face are synchronously coated while the upper face and the lower face of the plastic sheet are coated, use is convenient, and the coating machining effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic sheet processing technology, and in particular to a coating processing device for PET plastic sheets. Background Technology

[0002] According to the patent document with publication number CN220573781U, the patent document describes a process where a conveyor belt transports plastic sheets, and a pump in the spraying mechanism draws paint from a storage tank and delivers it to the spray head plate via a conduit. The spray head plate then sprays the plastic sheets. After spraying, the plastic sheets continue to move and pass through a scraping mechanism, where a comma scraper scrapes the paint evenly onto the surface of the plastic sheets. When it is necessary to adjust the thickness of the paint scraping on the plastic sheets, the threaded sleeve is loosened so that the threaded rod can move within the vertical groove, and the distance between the comma scraper and the plastic sheets is adjusted according to the requirements using a scale line.

[0003] The patent document states that when the spraying mechanism coats the upper surface of the plastic sheet, it can only coat the upper surface. If it is necessary to coat other sides of the plastic sheet, it is necessary to flip it over again, which is inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a coating processing device for PET plastic sheets in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] An apparatus for coating PET plastic sheets includes a plastic sheet, and further includes a lower coating mechanism and an upper coating mechanism;

[0007] The lower coating mechanism includes a paint box located under the plastic sheet. A lower paint roller is rotatably connected to the top of the paint box. A material transfer wheel is fixed at both ends of the lower paint roller. A brush plate is provided on the upper side of the two material transfer wheels. A first sliding column and a second sliding column are fixed on both sides of the two brush plates. A first connecting plate is sleeved on the outside of the four first sliding columns. A second connecting plate is hinged to the outside of the four second sliding columns.

[0008] The coating mechanism includes a support frame located on the upper side of the plastic sheet. A movable frame is slidably connected to the bottom of the support frame. Two springs are fixed between the top of the movable frame and the bottom of the support frame. An upper coating roller is rotatably connected to the bottom of the movable frame. Discharge holes are opened at equal intervals on the outer side of the upper coating roller. A conveying pipe is provided between the coating box and the upper coating roller.

[0009] Preferably, a first conveyor belt is provided on the other side of the bottom of the plastic sheet, and a receiving mechanism is provided on one side of the plastic sheet.

[0010] Preferably, the receiving mechanism includes a fixed frame, a lead screw is rotatably connected to the top of the fixed frame, a sliding plate is threaded to the outside of the lead screw, cylinders are fixedly installed on both the front and rear sides of the sliding plate, clamps are fixedly installed at the extension and retraction ends of the two cylinders, and a third motor is fixedly installed at the input end of the lead screw.

[0011] Preferably, a first motor is fixedly installed at the input end of the lower paint roller, a second motor is fixedly installed at the input end of the upper paint roller, a first sliding column is located below the second sliding column, four first connecting plates are fixedly connected to the inner side of the support frame, and four second connecting plates are fixedly connected to the inner side of the movable frame.

[0012] Preferably, an upper scraper is fixed to one side of the bottom of the movable frame, a lower scraper is fixed to one side of the top of the paint box, and a filter plate is fixed inside the paint box, with the filter plate located below the lower scraper.

[0013] Preferably, the top front and rear sides of the mobile frame are fixed with sliding plates, and the top front and rear sides of the support frame are provided with sliding grooves that cooperate with the sliding plates.

[0014] Preferably, the discharge end of the conveying pipe extends into the interior of the upper coating roller, and several discharge pipes are provided at the bottom of the discharge end of the conveying pipe. The feed end of the conveying pipe extends into the coating box, and a water pump is fixedly installed at the feed end of the conveying pipe.

[0015] The advantages compared with the existing technology are as follows: the upper and lower coating rollers move the plastic sheet to one side while coating its upper and lower surfaces. Two springs automatically move the moving frame upward to adjust the height of the upper coating roller, which can meet the coating processing of plastic sheets of different thicknesses. The upward movement of the moving frame drives the two brush plates to flip, so that the upper and lower surfaces of the plastic sheet are coated at the same time as the front and back sides. It is convenient to use and improves the coating processing effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the coating processing device for PET plastic sheets described in this utility model;

[0018] Figure 2 This is a top view of the PET plastic sheet coating processing apparatus described in this utility model;

[0019] Figure 3 yes Figure 2Sectional view at point A in the middle;

[0020] Figure 4 yes Figure 2 Sectional view at point B;

[0021] Figure 5 This is a schematic diagram of the lower coating mechanism structure of the PET plastic sheet coating processing device described in this utility model;

[0022] Figure 6 This is a schematic diagram of the upper coating mechanism structure of the PET plastic sheet coating processing device described in this utility model;

[0023] Figure 7 This is a schematic diagram of the movable frame and coating roller structure of the PET plastic sheet coating processing device described in this utility model;

[0024] Figure 8 This is a schematic diagram of the support frame and brush plate structure of the PET plastic sheet coating processing device described in this utility model;

[0025] Figure 9 This is a left view of the PET plastic sheet coating processing apparatus described in this utility model;

[0026] Figure 10 yes Figure 9 A magnified view of a portion of the image along the C direction.

[0027] The annotations in the attached figures are explained as follows:

[0028] 1. Plastic sheet; 2. Conveyor belt; 3. Receiving mechanism; 4. Lower coating mechanism; 5. Upper coating mechanism; 301. Fixed frame; 302. Lead screw; 303. Sliding plate; 304. Cylinder; 305. Clamping plate; 401. Paint box; 402. Lower paint roller; 403. First motor; 404. Lower scraper; 405. Filter plate; 406. Brush plate; 407. First sliding column; 408. First connecting plate; 409. Second sliding column; 410. Second connecting plate; 411. Transfer wheel; 501. Support frame; 502. Moving frame; 503. Spring; 504. Upper paint roller; 505. Second motor; 506. Conveying pipe; 507. Water pump; 508. Upper scraper. Detailed Implementation

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1-10 As shown, an apparatus for coating PET plastic sheets includes a plastic sheet 1, a lower coating mechanism 4, and an upper coating mechanism 5.

[0032] In this embodiment: the lower coating mechanism 4 includes a paint box 401, which is located below the plastic sheet 1. A lower paint roller 402 is rotatably connected to the top of the paint box 401. A first motor 403 is fixedly installed at the input end of the lower paint roller 402. A rotating wheel 411 is fixed at both ends of the lower paint roller 402. A brush plate 406 is provided on the upper side of each of the two rotating wheels 411. A first sliding column 407 and a second sliding column 409 are fixed on both sides of each of the two brush plates 406. A first connecting plate 408 is sleeved on the outer side of each of the four first sliding columns 407. A second connecting plate 410 is hinged to the outer side of each of the four second sliding columns 409. An upper scraper 508 is fixed on one side of the bottom of the movable frame 502. A lower scraper 404 is fixed on one side of the top of the paint box 401. A filter plate 405 is fixed inside the 01, located below the lower scraper 404. The filter plate 405 picks up the paint in the paint box 401 through several bristles on the outside of the lower paint roller 402. The first motor 403 drives the lower paint roller 402 and the transfer wheel 411 to rotate clockwise. Then, the collection groove on the outside of the transfer wheel 411 transports the paint in the paint box 401 from the bottom to the top, so that the brush plate 406 picks up the paint. The lower paint roller 402 moves the plastic sheet 1 to one side while coating its lower surface. The lower scraper 404 scrapes the paint on the lower surface of the coated plastic sheet 1 evenly. The filter plate 405 filters the paint dripping from the lower scraper 404 and the upper scraper 508 and flows into the paint box 401 for reuse.

[0033] In this embodiment: the upper coating mechanism 5 includes a support frame 501, which is located on the upper side of the plastic sheet 1. A movable frame 502 is slidably connected to the bottom of the support frame 501. Slide plates are fixed on both the front and rear sides of the top of the movable frame 502. Slide grooves that cooperate with the slide plates are opened on both the front and rear sides of the top of the support frame 501. Two springs 503 are fixed between the top of the movable frame 502 and the bottom of the support frame 501. An upper coating roller 504 is rotatably connected to the bottom of the movable frame 502. Discharge holes are opened at equal intervals on the outer side of the upper coating roller 504. The input end of the upper coating roller 504... A second motor 505 is fixedly installed. A first sliding column 407 is located below the second sliding column 409. Four first connecting plates 408 are fixedly connected to the inner side of the support frame 501, and four second connecting plates 410 are fixedly connected to the inner side of the movable frame 502. A conveying pipe 506 is provided between the paint box 401 and the upper paint roller 504. The discharge end of the conveying pipe 506 extends into the interior of the upper paint roller 504. Several discharge pipes are opened at the bottom of the discharge end of the conveying pipe 506. The feed end of the conveying pipe 506 extends into the paint box 401. The feed end of the conveying pipe 506 is fixedly installed. A water pump 507 is installed, which pumps paint from the paint box 401 into the upper paint roller 504 via the conveying pipe 506. A second motor 505 drives the upper paint roller 504 to rotate counterclockwise, thereby moving the plastic sheet 1 to one side and coating its upper surface. An upper scraper 508 evenly spreads the paint on the surface of the coated plastic sheet 1. The elastic force of two springs 503 causes the upper paint roller 504 to contact the plastic sheet 1, and the springs 503 adjust the roller's position according to the thickness of the plastic sheet 1. The coating roller 504 and the moving frame 502 move upward to meet the coating processing of plastic sheets 1 of different thicknesses. During this process, the moving frame 502 moves upward, driving the four second connecting plates 410 to move upward. Then, the four second connecting plates 410 pull the corresponding second sliding columns 409 upward, thereby pulling the corresponding four first sliding columns 407 to move towards the plastic sheet 1 within the corresponding four first connecting plates 408 through the two brush plates 406. Finally, the two brush plates 406 are rotated to coat the front and rear sides of the plastic sheet 1.

[0034] In this embodiment: A first conveyor belt 2 is provided on the other side of the bottom of the plastic sheet 1, and a receiving mechanism 3 is provided on one side of the plastic sheet 1. The receiving mechanism 3 includes a fixed frame 301, a lead screw 302 is rotatably connected to the top of the fixed frame 301, a sliding plate 303 is threadedly connected to the outside of the lead screw 302, and cylinders 304 are fixedly provided on both the front and rear sides of the sliding plate 303. Clamping plates 305 are fixedly provided at the extension and retraction ends of the two cylinders 304, and a third motor is fixedly provided at the input end of the lead screw 302. The plastic sheet 1 is transported to the lower coating roller 402 and the upper coating roller 504 for coating processing by the first conveyor belt 2. The two clamping plates 305 are pushed by the two cylinders 304 to clamp the front and rear sides of the coated plastic sheet 1. The lead screw 302 is driven to rotate by the third motor, which in turn drives the sliding plate 303 to move from one side to the other side, thereby receiving the coated plastic sheet 1.

[0035] Working principle: The plastic sheet 1 is placed on the other side of the top of the first conveyor belt 2. The first conveyor belt 2 transports the plastic sheet 1 to the lower coating roller 402 and the upper coating roller 504 for coating processing. The first motor 403 drives the lower coating roller 402 and the transfer wheel 411 to rotate clockwise. Then, the material collection groove on the outside of the transfer wheel 411 transports the paint in the paint box 401 from bottom to top, so that the brush plate 406 can pick up the paint. The lower coating roller 402 moves the plastic sheet 1 to one side while coating its lower surface. The elastic force of the two springs 503 causes the upper coating roller 504 to contact the plastic sheet 1. According to the thickness of the plastic sheet 1, the two springs 503 drive the upper coating roller 504 and the moving frame 502 to move upward. The two sliders on the top of the moving frame 502 slide in the corresponding two grooves of the support frame 501. During this process, the moving frame 502 moves upward, driving the four The second connecting plate 410 moves upward, and then the four second connecting plates 410 pull the corresponding second sliding column 409 upward, thereby pulling the corresponding four first sliding column 407 within the corresponding four first connecting plates 408 towards the plastic sheet 1 through the two brush plates 406. Finally, the two brush plates 406 are rotated to coat the front and rear sides of the plastic sheet 1. The water pump 507 transports the paint in the paint box 401 from the feed end of the conveying pipe 506 to the discharge end. Then, the paint is discharged from several discharge pipes at the discharge end of the conveying pipe 506 into the upper paint roller 504. The paint is discharged from the discharge hole of the upper paint roller 504. The second motor 505 drives the upper paint roller 504 to rotate counterclockwise. Then, the upper paint roller 504 moves the plastic sheet 1 to one side while coating its upper surface. Several bristles on the outside of the upper paint roller 504 spread the discharged paint evenly.

[0036] As the coated plastic sheet 1 moves to one side, the upper scraper 508 scrapes the coating evenly on the upper surface of the coated plastic sheet 1, and the lower scraper 404 scrapes the coating evenly on the lower surface of the coated plastic sheet 1. Two cylinders 304 push two clamping plates 305 to clamp the front and rear sides of the coated plastic sheet 1. The third motor drives the lead screw 302 to rotate, which in turn drives the sliding plate 303 to move from the other side to one side. The coating adhering to the lower scraper 404 and the upper scraper 508 drips onto the filter plate 405. After being filtered by the filter plate 405, the dripping coating flows into the coating box 401 for reuse.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An apparatus for coating PET plastic sheets, comprising a plastic sheet (1), characterized in that: It also includes a lower coating mechanism (4) and an upper coating mechanism (5); The lower coating mechanism (4) includes a paint box (401), which is located on the lower side of the plastic sheet (1). A lower paint roller (402) is rotatably connected to the top of the paint box (401). A material transfer wheel (411) is fixed at both ends of the lower paint roller (402). A brush plate (406) is provided on the upper side of the two material transfer wheels (411). A first sliding column (407) and a second sliding column (409) are fixed on both sides of the two brush plates (406). A first connecting plate (408) is sleeved on the outside of the four first sliding columns (407). A second connecting plate (410) is hinged on the outside of the four second sliding columns (409). The coating mechanism (5) includes a support frame (501) located on the upper side of the plastic sheet (1). A movable frame (502) is slidably connected to the bottom of the support frame (501). Two springs (503) are fixed between the top of the movable frame (502) and the bottom of the support frame (501). An upper coating roller (504) is rotatably connected to the bottom of the movable frame (502). Discharge holes are equidistantly opened on the outer side of the upper coating roller (504). A conveying pipe (506) is provided between the coating box (401) and the upper coating roller (504).

2. The apparatus for coating PET plastic sheets according to claim 1, characterized in that: The plastic sheet (1) has a first conveyor belt (2) on the other side of its bottom, and a receiving mechanism (3) is provided on one side of the plastic sheet (1).

3. The apparatus for coating PET plastic sheets according to claim 2, characterized in that: The receiving mechanism (3) includes a fixed frame (301), a lead screw (302) is rotatably connected to the top of the fixed frame (301), a sliding plate (303) is threadedly connected to the outside of the lead screw (302), cylinders (304) are fixedly installed on both the front and rear sides of the sliding plate (303), clamps (305) are fixedly installed at the extension and retraction ends of the two cylinders (304), and a third motor is fixedly installed at the input end of the lead screw (302).

4. The apparatus for coating PET plastic sheets according to claim 1, characterized in that: A first motor (403) is fixedly installed at the input end of the lower coating roller (402), and a second motor (505) is fixedly installed at the input end of the upper coating roller (504). The first slide column (407) is located below the second slide column (409). The four first connecting plates (408) are all fixedly connected to the inner side of the support frame (501), and the four second connecting plates (410) are all fixedly connected to the inner side of the movable frame (502).

5. The apparatus for coating PET plastic sheets according to claim 1, characterized in that: An upper scraper (508) is fixed to one side of the bottom of the movable frame (502), a lower scraper (404) is fixed to one side of the top of the paint box (401), a filter plate (405) is fixed inside the paint box (401), and the filter plate (405) is located below the lower scraper (404).

6. The apparatus for coating PET plastic sheets according to claim 1, characterized in that: The movable frame (502) has sliding plates fixed on both the front and rear sides of its top, and the support frame (501) has grooves on both the front and rear sides of its top that cooperate with the sliding plates.

7. The apparatus for coating PET plastic sheets according to claim 1, characterized in that: The discharge end of the conveying pipe (506) extends into the interior of the coating roller (504). Several discharge pipes are provided at the bottom of the discharge end of the conveying pipe (506). The feed end of the conveying pipe (506) extends into the coating box (401). A water pump (507) is fixedly installed at the feed end of the conveying pipe (506).

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