Coating device

Abstract

The utility model relates to a coating device which comprises two side plates which are symmetrically arranged, a paper pressing roller, a coating roller and a coating roller are sequentially and rotatably arranged between the two side plates from top to bottom, a channel for paper to penetrate through is formed between the coating roller and the paper pressing roller, the coating roller and the paper pressing roller rotate in the same direction, and the coating roller and the coating roller can be attached or separated in a rolling mode. The adjusting unit is connected with the coating roller, the detection element is located between the two side plates, the adjusting unit can drive the coating roller to make intermittent contact with or be separated from paper, and the detection element can detect plate seams of the paper. The coating device designed by the utility model can adapt to paper with different plate seams and realize accurate coating, so that the utilization rate of the coating device is improved, and the paper coating efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to paper production and processing technical field, especially a kind of coating device. BACKGROUND

[0002] Paper coating is a process that a layer of special function coating or ink is evenly coated on the surface of paper, and after drying, it is rolled up, and coating device is used to evenly coat liquid, powder or film on the front and back of paper.For some special style paper, coating device needs to be accurately coated and overprinted according to the paper version seam, but the existing coating device mostly adopts one seam one roller form, that is, the circumference of coating roller is equal to the distance between two paper version seams, when coating paper with different version seams, coating roller needs to be replaced, and due to the cumulative error of mechanical transmission, after coating a certain amount of paper, the paper coating position deviates, which needs to be manually calibrated, all of the above affect the operation rate of coating device and reduce the paper coating efficiency. SUMMARY

[0003] In view of the above problems, the utility model aims to design a coating device, which can adapt to paper with different version seams and realize accurate coating, improve the operation rate of coating device and improve the efficiency of paper coating.

[0004] The utility model discloses the purpose that is realized through the following technical schemes:

[0005] A kind of coating device is designed, including two symmetrically arranged side plates, paper pressing roller, coating roller and coating roller are sequentially rotated from top to bottom between two side plates, the passage for paper passing through is formed between the coating roller and the paper pressing roller and does same direction rotation, the coating roller and coating roller can be rollable adhesion or separate;It also includes adjusting unit connected with the coating roller, and detection element located between two side plates, the adjusting unit can drive the coating roller and paper intermittent contact or separate, the detection element can detect the version seam of paper.

[0006] The coating device designed in the scheme can press the paper against the coating roller through the paper pressing roller, and the paper conveying is driven by the rotation of the paper pressing roller, and the paper conveying traction is also matched by the related supporting device or the conveying roller. The surface of the coating roller is adsorbed with paint, and the paint on the coating roller can be transferred to the coating roller by the rolling and fitting of the coating roller and the coating roller. In addition, the thickness of the paint on the surface of the coating roller can be adjusted by adjusting the gap between the coating roller and the coating roller. The front of the paper has a plate joint, which is a reference mark for the back of the paper. The starting point of the coating of the coating roller corresponds to the reference mark. After the coating roller completes the coating once, the adjusting unit controls the coating roller to separate from the paper and rolls with the coating roller to complete the transfer of the paint. When the next plate joint of the paper is conveyed to the coating roller, the adjusting unit controls the coating roller to contact the paper, so that the starting point of the coating of the coating roller corresponds to the plate joint and starts to roll and coat. In addition, a detection element for identifying the plate joint is also provided. The detection element detects the plate joint of the paper and sends information to the control system. The control system controls the rotating speed of the coating roller and the adjusting unit, so that the starting point of the coating of the coating roller always corresponds to the plate joint of the paper, and the cumulative error of the mechanical transmission is eliminated to cause the deviation of the inking position. Through the above design, the coating roller can adapt to different plate joints of the paper and realize accurate coating, improve the operation rate of the coating device, and improve the efficiency of the paper coating.

[0007] Further, the adjusting unit comprises driving wheels rotatably arranged on the two side plates respectively, and a connecting arm, one end of the connecting arm is connected with the coating roller, and the other end of the connecting arm is connected with the driving wheels.

[0008] The middle part of the connecting arm is provided with a rotating shaft which is rotatably fixed on the side plate through a bearing member, and one end of the connecting arm is connected with the coating roller through a shaft sleeve, and the other end of the connecting arm is connected with the driving wheels. The driving wheel drives the connecting arm to swing periodically, so that the coating roller intermittently contacts and separates from the paper.

[0009] Further, the driving wheel is provided with a track groove, and one end of the connecting arm connected with the driving wheel is provided with a roller embedded in the track groove.

[0010] The driving wheel is a circular wheel, and the track groove is formed in the side surface of the driving wheel. One end of the connecting arm is connected with the track groove through the roller. When the driving wheel rotates, the roller rolls along the track groove, thereby driving the connecting rod to swing periodically. The track path of the track groove needs to be designed in detail according to the path of the movement of the coating roller.

[0011] Further, the adjusting unit further comprises a transmission shaft and a driving member for driving the transmission shaft to rotate, and the two driving wheels are connected to the two ends of the transmission shaft respectively.

[0012] The two driving wheels are synchronously connected through a transmission shaft, and the driving member can use a driving motor to simultaneously drive the two driving wheels to rotate, thereby saving cost. In addition, the speed of the driving motor is controlled by the control system to control the rotation speed of the driving wheels, so that the separation and lamination time of the coating roller and the paper can be adjusted to adapt to paper with different version gaps. The detection element is matched to continuously calibrate and correct to ensure accuracy.

[0013] Further, a coating tank is further arranged below the coating roller, and the peripheral side of the coating roller extends into the coating tank.

[0014] The coating tank is used to hold coating, and the peripheral side of the coating roller extends into the coating tank to contact the coating liquid surface and stick the coating during rotation.

[0015] Further, the coating tank is further provided with an inlet, and the inlet is connected to an external coating tank through a pipeline.

[0016] The coating tank is further provided with an inlet, and the inlet is connected to an external coating tank through a pipeline.

[0017] Further, the coating tank is further provided with an outlet, and the outlet is connected to an external coating tank through a pipeline, and the outlet is higher than the bottom surface of the coating tank and lower than the top surface of the side wall of the coating tank.

[0018] By arranging the outlet, the height of the coating liquid surface can be kept at a certain height, ensuring the stability and effectiveness of the contact between the coating roller and the coating liquid surface, and ensuring that each part can stick the same amount of coating during rotation, which is beneficial to accurately control the amount of coating.

[0019] Further, the side of the coating roller is further provided with a scraper unit for scraping excess coating on the surface of the coating roller.

[0020] By arranging the scraper unit to remove excess coating on the surface of the coating roller, the coating roller can transfer an appropriate amount of coating to the surface of the coating roller when rolling and lamination with the coating roller, which is beneficial to adjust the amount of coating.

[0021] Further, the scraper unit comprises a base arranged between the two side plates, and a blade slidably arranged on the base, and the base is provided with a pressing member for pressing and fixing the blade.

[0022] The amount of paint on the surface of the paint roller can be changed by adjusting the distance between the blade and the paint roller, the position of the blade on the base can be adjusted forward and backward, the blade can be quickly fixed by setting the pressing member to avoid movement of the blade. The movement direction of the contact point of the blade and the paint roller is the same as the trend of the blade edge of the blade, which ensures that the blade edge of the blade cuts the paint roller during rotation of the paint roller, and the relationship between the paint roller and the paint roller is wiping, thereby reducing the wear between the two.

[0023] Further, the base is also provided with a guide groove, and the position opposite to the guide groove of the blade is also provided with a guide block.

[0024] In order to avoid the blade from being deflected when adjusting the position, a guide structure is arranged between the blade and the base, the blade slides linearly along the guide groove for adjustment, and the distance between the blade and the paint roller is always kept consistent.

[0025] Compared with the prior art, the utility model has the advantages of:

[0026] The coating device designed in the scheme presses the paper on the coating roller by the paper pressing roller, and the paper is conveyed by the rotation of the paper pressing roller. In addition, the paper conveying traction is also matched by the related matching device or the conveying roller. The surface of the paint roller is adsorbed with paint, and the paint on the paint roller can be transferred to the coating roller by rolling and adhering the paint roller and the coating roller. In addition, the thickness of the paint on the surface of the coating roller can be adjusted by adjusting the gap between the paint roller and the coating roller. The front of the paper has a plate joint, and the plate joint is a reference mark for coating overprint on the back of the paper. The starting point of the coating overprint of the coating roller corresponds to the reference mark. After the coating roller completes coating once, the adjusting unit controls the coating roller to separate from the paper and roll with the paint roller to complete the transfer of the paint. When the next plate joint of the paper is conveyed to reach, the adjusting unit controls the coating roller to contact the paper, so that the starting point of the coating overprint of the coating roller corresponds to the plate joint and starts to roll and coat. In addition, a detection element for identifying the plate joint is also arranged. The detection element detects the plate joint of the paper and sends information to the control system. The control system controls the rotating speed of the coating roller and the adjusting unit, so that the starting point of the coating overprint of the coating roller always corresponds to the plate joint of the paper, and the cumulative error of mechanical transmission is eliminated to avoid the deviation of the overprint position. Through the above design, the coating roller can adapt to different plate joints of the paper and realize accurate coating, improve the operation rate of the coating device, and improve the efficiency of paper coating. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural diagram of the coating device of an embodiment of the utility model.

[0028] Figure 2 It is a structural diagram of the coating device of an embodiment of the utility model.

[0029] Figure 3 It isFigure 2 Local enlarged view of the middle A.

[0030] Figure 4 Structure diagram of the paint tank of an embodiment of the present application.

[0031] Figure 5 Structure diagram of the scraper unit of an embodiment of the present application.

[0032] Figure 6 Rear view of Figure 5

[0033] Illustration: 1, side plate; 2, paper pressing roller; 3, coating roller; 4, paint roller; 5, adjusting unit; 51, driving wheel; 52, connecting arm; 53, transmission shaft; 54, driving part; 55, track groove; 56, roller; 6, detection element; 7, paint tank; 71, feeding port; 72, discharging port; 8, scraper unit; 81, base; 82, blade; 83, pressing part; 84, guide groove; 85, guide block. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein.

[0035] As Figures 1 to 6 shown, the present embodiment provides a coating device, which comprises two symmetrically arranged side plates 1, a paper pressing roller 2, a coating roller 3 and a paint roller 4 are sequentially arranged between the two side plates 1 from top to bottom. The paper pressing roller 2 is a rubber pressing roller, the coating roller 3 is a steel roller with a resin plate attached to its surface, the pattern on the resin plate is made in a raised manner, and the paint roller 4 is a printing screen roller. A channel for paper to pass through is formed between the coating roller 3 and the paper pressing roller 2, and the coating roller 3 and the paint roller 4 can be rollably attached or separated. The paper pressing roller 2, the coating roller 3 and the paint roller 4 are all connected to a driving motor, and the driving motor of the coating roller 3 can be a tubular motor. The coating roller 3 is designed to be hollow, and the tubular motor is hidden inside the coating roller 3. The coating roller 3 and the paper pressing roller 2 rotate in the same direction, and the paper driven by the paper pressing roller 2 is in frictional contact with the surface of the coating roller 3. Since the coating roller 3 and the paper pressing roller 2 rotate in the same direction, the turning directions of their relative positions are opposite, so the movement direction of the paper is opposite to the turning direction of the coating roller 3, and therefore there is no relative sliding between them. In addition, the coating device further comprises an adjusting unit 5 connected to the coating roller 3 and a detection element 6 located between the two side plates. The adjusting unit 5 can drive the coating roller 3 to intermittently contact or separate from the paper, and the detection element 6 can detect the board joint of the paper. The detection element 6 can be a camera or a photoelectric switch.

[0036] ​The coating device of the embodiment presses the paper against the coating roller 3 by the paper pressing roller 2, and the paper is conveyed by the rotation of the paper pressing roller 2, and the conveying of the paper is also pulled by the related matching device or the conveying roller, for example, the conveying roller is arranged downstream of the coating device to pull the paper and realize the movement of the paper. The surface of the coating roller 4 is adsorbed with the coating material, and the coating material on the coating roller 4 is transferred to the coating roller 3 by the rolling of the coating roller 4 and the coating roller 3, and the thickness of the coating material on the surface of the coating roller 3 can be adjusted by adjusting the gap between the coating roller 4 and the coating roller 3. The front of the paper has a plate joint, which is a reference mark for the back of the paper. The starting point of the coating overprint of the coating roller 3 corresponds to the reference mark, and after the coating roller 3 completes the coating once, the adjusting unit 5 controls the coating roller 3 to separate from the paper and roll with the coating roller 4 to complete the transfer of the coating material. When the next plate joint of the paper is conveyed to reach, the adjusting unit 5 controls the coating roller 3 to contact the paper, so that the starting point of the coating overprint of the coating roller 3 corresponds to the plate joint and starts to roll and coat. In addition, a detection element 6 for identifying the plate joint is also arranged, which detects the plate joint of the paper and sends information to the control system, and the control system controls the rotating speed of the coating roller 3 and the adjusting unit 5, so that the starting point of the coating overprint of the coating roller 3 always corresponds to the plate joint of the paper, and the cumulative error of the mechanical transmission is eliminated to cause the overprint position deviation. Through the above design, the coating roller 3 can adapt to different plate joint papers and realize accurate coating, improve the operation rate of the coating device, and improve the efficiency of the paper coating.

[0037] As Figures 1 to 3As shown, in the present embodiment, the adjusting unit 5 comprises driving wheels 51 arranged on the two side plates 1 respectively, connecting arms 52, transmission shafts 53, and driving members 54 for driving the transmission shafts 53 to rotate, one end of each connecting arm 52 is connected with the coating roller 3, the other end of each connecting arm 52 is connected with the driving wheel 51, the driving wheel 51 is provided with a track groove 55, one end of each connecting arm 52 connected with the driving wheel 51 is provided with a roller 56 embedded in the track groove 55, and the two driving wheels 51 are connected with the two ends of the transmission shaft 53 respectively. The middle part of each connecting arm 52 is provided with a rotating shaft which is rotatably fixed on the side plate through a bearing member, one end of each connecting arm 52 is connected with the coating roller 3 through a shaft sleeve, and the coating roller 3 is rotatably supported by the two connecting arms 52. The driving wheel 51 is a circular wheel, a track groove 55 is formed in the side surface of the driving wheel 51, the other end of each connecting arm 52 is connected with the track groove 55 through the roller 56, when the driving wheel 51 rotates, the roller 56 rolls along the track groove 55, thereby driving the connecting arm to periodically swing, so that the coating roller 3 intermittently contacts and separates from the paper. The track path of the track groove 55 needs to be designed in detail according to the moving path of the coating roller 3. The two driving wheels 51 are synchronously connected through the transmission shaft 53, the driving member 54 can be a driving motor, a chain or a belt can be used for transmission between the output end of the driving motor and the transmission shaft 53, and using the same driving motor to simultaneously drive the two driving wheels 51 to rotate can save cost. In addition, the rotating speed of the driving wheel 51 can be controlled by controlling the rotating speed of the driving motor, thereby adjusting the time for the coating roller 3 to separate from and adhere to the paper, so as to adapt to paper with different version gaps, cooperate with the detection element, and continuously calibrate and correct to ensure accuracy.

[0038] As shown in Figure 1 and Figure 4 , a coating tank 7 is further arranged below the coating roller 4, and the peripheral side of the coating roller 4 extends into the coating tank 7. The coating tank 7 is used for containing coating material, and the peripheral side of the coating roller 4 extends into the coating tank 7 to contact the coating liquid surface and stick the coating material during rotation. The bottom of the coating tank 7 is further provided with an inlet 71 and an outlet 72, the inlet 71 and the outlet 72 are connected with an external coating tank through pipelines, and the outlet 72 is higher than the bottom surface of the coating tank 7 and lower than the top surface of the side wall of the coating tank 7. The coating material is automatically pumped into the coating tank 7 by a pump in the external coating tank to realize automatic feeding, and the outlet 72 is arranged to ensure that the height of the coating liquid surface is always maintained at a certain height, thereby ensuring the stability and effectiveness of the contact between the coating roller 4 and the coating liquid surface, ensuring that each part can stick the same amount of coating material during rotation, and being beneficial to accurately control the amount of coating material.

[0039] As shown in Figure 2 , Figure 5 and Figure 6As shown, the side of the coating roller 4 is also provided with a scraper unit 8 for scraping the excess paint on the surface of the coating roller 4, so that the coating roller 4 can transfer the appropriate amount of paint to the surface of the coating roller when rolling and adhering with the coating roller 3, which is beneficial to adjust the amount of paint. The scraper unit 8 comprises a base 81 arranged between the two side plates 1, and a blade 82 slidably arranged on the base 81, and the base 81 is provided with a pressing member 83 for pressing and fixing the blade 82. The base 81 is also provided with a guide groove 84, and the position opposite to the guide groove 84 of the blade 82 is also provided with a guide block 85. The amount of paint on the surface of the coating roller 4 can be changed by adjusting the distance between the blade 82 and the coating roller 4, and the position of the blade 82 on the base 81 can be adjusted forward and backward, and the blade 82 can be quickly fixed by arranging the pressing member 83 to avoid the movement of the blade 82. The pressing member 83 has a pressing block and a threaded rod connected with the pressing block, and the base is provided with a threaded hole matched with the threaded rod, and the rising and falling of the pressing block is realized by rotating the adjusting threaded rod. The movement direction of the contact point of the blade 82 and the coating roller 4 is the same as the trend of the blade edge of the blade 82, so that the blade edge of the blade 82 cuts the coating roller 4 during the rotation of the coating roller 4, and the coating roller 4 and the coating roller 4 are in a wiping relationship, which reduces the wear between them. In order to avoid the deflection of the blade when adjusting the position, a guide structure is arranged between the blade 82 and the base 81, the blade 82 slides linearly along the guide groove 84 for adjustment, and the distance between the blade 82 and the coating roller 4 is always kept consistent.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0041] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0042] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A coating device characterized by comprising: The application relates to a paper coating device, which comprises two symmetrically arranged side plates, a paper pressing roller, a coating roller and a paint roller arranged in sequence from top to bottom between the two side plates, a channel for paper passing through is formed between the coating roller and the paper pressing roller, the coating roller and the paint roller rotate in the same direction, the coating roller and the paint roller can be rollably attached or separated, an adjusting unit connected with the coating roller and a detection element between the two side plates are further included, the adjusting unit can drive the coating roller to intermittently contact or separate from the paper, and the detection element can detect the board joint of the paper.

2. The coating apparatus according to claim 1, wherein The adjusting unit comprises driving wheels arranged on the two side plates respectively and a connecting arm, one end of the connecting arm is connected with the coating roller, and the other end of the connecting arm is connected with the driving wheels.

3. The coating apparatus according to claim 2, wherein The driving wheels are provided with track grooves, and the end of the connecting arm connected with the driving wheels is provided with a roller embedded in the track grooves.

4. The coating apparatus according to claim 2, wherein The adjusting unit further comprises a transmission shaft and a driving member for driving the transmission shaft to rotate, and the two driving wheels are connected with two ends of the transmission shaft respectively.

5. The coating apparatus according to claim 1, wherein A paint tank is further arranged below the paint roller, and the circumferential side of the paint roller extends into the paint tank.

6. The coating apparatus according to claim 5, wherein The paint tank is further provided with an inlet, and the inlet is connected with an external paint tank through a pipeline.

7. The coating apparatus according to claim 6, wherein The paint tank is further provided with an outlet, the outlet is connected with an external paint tank through a pipeline, the outlet is higher than the bottom surface of the paint tank and lower than the top surface of the side wall of the paint tank.

8. The coating apparatus of claim 1, wherein, The side of the paint roller is further provided with a scraper unit for scraping the excess paint on the surface of the paint roller.

9. The coating apparatus according to claim 8, wherein The scraper unit comprises a base arranged between the two side plates and a blade slidably arranged on the base, and the base is provided with a pressing member for pressing and fixing the blade.

10. The coating apparatus according to claim 9, wherein The base is further provided with a guide groove, and the position opposite to the guide groove of the blade is further provided with a guide block.

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