Dot coating device

Abstract

A dot coating device, comprising: a frame (100), a first base (110) being arranged on the frame (100); a material cartridge (200), the material cartridge (200) being arranged on the first base (110); a gravure roller (130), a plurality of slots being uniformly distributed on the outer wall of the gravure roller (130); a relief roller (140), a plurality of raised dots (141) being uniformly distributed on the outer wall of the relief roller (140), and the raised dots (141) being capable of extending into the slots; and a back roller (150), a gap between the back roller (150) and the relief roller (140) being used for allowing a film to pass through. The first base (110) is configured such that the position is adjustable in the left-right direction, so that the size of the gap between the relief roller (140) and the back roller (150) is adjustable, and the size of a dot coating on the film is adjustable. The dot coating device allows to adjust the size of a dot coating on the basis of film products having different specifications, thereby improving the coating flexibility of dot coating devices.

Description

dot coating device Technical Field

[0001] This invention relates to the field of coating technology, and particularly to a dot coating apparatus. Background Technology

[0002] A dot coating apparatus is a device used to coat the surface of a thin film by applying paint in a dotted pattern to form a discrete dotted coating on the film. In the prior art, dot coating apparatuses cannot adjust the size of the dotted paint according to the different specifications of the thin film products, thus reducing the coating flexibility of the apparatus. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a dot coating device that can adjust the size of the dot coating according to different film products, thereby improving the coating flexibility of the dot coating device.

[0004] According to an embodiment of the present invention, a dotting device includes a frame, a material box, a gravure roller, a letterpress roller, and a back roller. A first base is provided on the frame. The material box is disposed on the first base and is used to store paint. The gravure roller is rotatably connected to the first base, and its outer wall is evenly distributed with multiple grooves. The gravure roller is located on the left side of the material box and is correspondingly arranged to the material box, so that the paint in the material box can be transferred to the multiple grooves. The letterpress roller is rotatably connected to the first base, and its outer wall is evenly distributed with multiple protrusions. The letterpress roller is located on the left side of the gravure roller and is correspondingly arranged to the gravure roller, so that the multiple protrusions can respectively extend into the multiple grooves, and paint is adhered to the multiple protrusions. The back roller is rotatably connected to the frame and is used for film winding. The back roller is located to the left of the letterpress roller, and the gap between the back roller and the letterpress roller allows the film to pass through, enabling the coating adhering to the embossed dots to be transferred to the film and form dotted coating. The first base is configured to be positionally adjustable in the left-right direction, allowing the gap between the letterpress roller and the back roller to be adjusted, and the size of the dotted coating on the film to be adjusted.

[0005] It has at least the following beneficial effects:

[0006] When film dot coating is required, the gravure roller, letterpress roller, and back roller can rotate simultaneously. The gravure roller is positioned corresponding to the material box, allowing the paint in the box to be transferred to multiple grooves on the outer wall of the gravure roller, ensuring that each groove contains paint. The letterpress roller is positioned to the left of the gravure roller. During its rotation, multiple protrusions on the outer wall of the letterpress roller extend into the grooves on the outer wall of the gravure roller, ensuring that each protrusion is coated with paint. The film is wound around the back roller, and the rotating back roller moves the film. The gap between the back roller and the letterpress roller allows the film to pass through, enabling the paint droplets adhering to the protrusions on the letterpress roller to contact the film, thus transferring the paint onto the film and forming multiple dots of paint on the film surface. When the size of the dotted paint needs to be adjusted for different film specifications, the first base can be moved to the left, bringing the letterpress roller closer to the back roller to reduce the gap between the letterpress roller and the back roller. By reducing the gap between the letterpress roller and the back roller, the contact area between the paint droplets adhering to the bumps and the film increases, resulting in a larger diameter and a smaller thickness of the formed dotted coating. Alternatively, moving the first base to the right moves the letterpress roller away from the back roller, increasing the gap between them. This increased gap further reduces the contact area between the paint droplets adhering to the bumps and the film, resulting in a smaller diameter and a larger thickness of the formed dotted coating. This dot coating device allows for adjustment of the dotted coating size according to different film product specifications, thereby improving the coating flexibility of the device.

[0007] According to an embodiment of the present invention, the dotting device further includes a first slide rail and a first slider. The first slide rail is parallel to the left-right direction and is disposed on the frame. The first slider is connected to the first base and is slidably connected to the first slide rail.

[0008] According to an embodiment of the present invention, the dotting device further includes a first linear drive mechanism, which is disposed on the frame and its output end is connected to the first base. The first linear drive mechanism is used to drive the first base to slide in the left-right direction.

[0009] According to an embodiment of the present invention, the dotting apparatus further includes a second base disposed on the first base, the material box disposed on the second base, the gravure roller being rotatably connected to the second base, and the second base being configured to be positionally adjustable in the left-right direction so that the gap between the gravure roller and the relief roller is adjustable.

[0010] According to an embodiment of the present invention, the dotting device further includes a second slide rail and a second slider. The second slide rail is parallel to the left-right direction and is disposed on the first base. The second slider is connected to the second base and is slidably connected to the second slide rail.

[0011] According to an embodiment of the present invention, the dotting device further includes a second linear drive mechanism, which is disposed on the first base and its output end is connected to the second base. The second linear drive mechanism is used to drive the second base to slide in the left-right direction.

[0012] According to an embodiment of the present invention, the material box includes a material hopper and a first scraper. The material hopper is used to store paint. A portion of the gravure roller is immersed in the paint in the material hopper. The first scraper is connected to the material hopper and abuts against the gravure roller. The first scraper is used to scrape off excess paint from the outer surface of the gravure roller so that the plurality of grooves are filled with paint.

[0013] According to an embodiment of the present invention, the material box further includes a second scraper, the second scraper is connected to the material bin, the second scraper is disposed below the first scraper, the second scraper abuts against the gravure roller, and the second scraper is used to scrape off impurities on the outer surface of the gravure roller.

[0014] According to an embodiment of the present invention, the dotting apparatus further includes a tension adjusting roller, which is rotatably connected to the frame and disposed below the back roller. The tension adjusting roller is used for winding the film and is configured to be adjustable in the vertical direction so that the tension of the film can be adjusted.

[0015] According to an embodiment of the present invention, the dotting apparatus further includes multiple traction rollers, all of which are rotatably connected to the frame and are used for winding the film.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 is a side view of the dotting device and the thin film according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the letterpress roller, back roller, and film in the dotting device of an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the gravure roller and material box in the dotting device of an embodiment of the present invention;

[0021] Figure 4 is a side view of the dotting device and the film in another state according to an embodiment of the present invention;

[0022] Reference numerals: Frame 100; First base 110; Second base 120; Gravure roller 130; Letterpress roller 140; Embossing dot 141; Back roller 150; Tension adjusting roller 160; Traction roller 170; Material box 200; First scraper 210; Second scraper 220; Material hopper 230. Detailed Implementation

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] Referring to Figures 1 to 3, the present invention discloses a dotting device, including a frame 100, a material box 200, a gravure roller 130, a letterpress roller 140, and a back roller 150.

[0027] A first base 110 is provided on the frame 100, and a material box 200 is disposed on the first base 110 for storing paint. A gravure roller 130 is rotatably connected to the first base 110. Multiple grooves are evenly distributed on the outer wall of the gravure roller 130. The gravure roller 130 is located on the left side of the material box 200 and is correspondingly positioned thereto, so that the paint in the material box 200 can be transferred to the multiple grooves. A letterpress roller 140 is rotatably connected to the first base 110. Multiple protrusions 141 are evenly distributed on the outer wall of the letterpress roller 140. The letterpress roller 140 is located on the left side of the gravure roller 130 and is correspondingly positioned thereto, so that the multiple protrusions 141 can extend into the multiple grooves respectively, and paint is adhered to the multiple protrusions 141. The back roller 150 is rotatably connected to the frame 100. The back roller 150 is used for film winding and is located to the left of the letterpress roller 140. The gap between the back roller 150 and the letterpress roller 140 allows the film to pass through, enabling the coating adhering to the bumps 141 to be transferred to the film and form dotted coating. The first base 110 is configured to be positionally adjustable in the left-right direction, allowing the distance between the gap between the letterpress roller 140 and the back roller 150 to be adjusted, and the size of the dotted coating on the film to be adjustable.

[0028] A gravure roller 130 is rotatably mounted on a first base 110, and a material box 200 is mounted on the first base 110. In this embodiment of the invention, the corresponding arrangement of the gravure roller 130 and the material box 200 means that the gravure roller 130 is partially immersed in the paint in the material box 200. When the gravure roller 130 starts to rotate, because the grooves on its surface have a certain depth, the paint in the material box 200 will fill the grooves during the rotation of the gravure roller 130, thereby allowing the paint in the material box 200 to be transferred to multiple grooves. A letterpress roller 140 is rotatably mounted on the first base 110. The letterpress roller 140 rotates in the opposite direction to the gravure roller 130, allowing multiple protrusions 141 on the letterpress roller 140 to rotate and extend into multiple grooves on the letterpress roller 140 respectively. After the protrusions 141 extend into the grooves, the protrusions 141 will contact the paint in the grooves, thereby allowing paint to adhere to the protrusions 141. As the letterpress roller 140 and gravure roller 130 rotate, the raised dots 141 disengage from the grooves. A back roller 150 is rotatably mounted on the frame 100. The back roller 150 is used to wind the film, and the gap between the back roller 150 and the letterpress roller 140 allows the film to pass through. As the back roller 150 and the letterpress roller 140 rotate, the film moves, and the coating adhering to the raised dots 141 comes into contact with the surface of the film, allowing the coating to transfer to the surface of the film, forming multiple dots of coating on the film surface. Specifically, in this embodiment, the gravure roller 130 is a rubber roller, and the raised dots 141 on the letterpress roller 140 abut against the gravure roller 130 to achieve coating transfer. The gravure roller 130, letterpress roller 140, and material box 200 are common components used for dot coating in the coating field, and will not be further described here. In this embodiment, the size of the dotted coating on different specifications of film products is also different, and will not be further described here.

[0029] The first base 110 is configured to be positionally adjustable in the left-right direction, meaning it can move left-right on the frame 100. This allows the material box 200, gravure roller 130, and relief roller 140 to move left-right with the first base 110, thereby adjusting the gap between the relief roller 140 and the back roller 150. Specifically, the relief roller 140 can move closer to or further away from the film wound on the back roller 150. Referring to Figure 2, the shaded areas represent paint droplets. When the distance between the relief roller 140 and the film on the back roller 150 is close, the paint droplets attached to the protrusions 141 have a larger contact area with the film, resulting in a larger diameter and thinner dotted paint layer. When the distance between the relief roller 140 and the film on the back roller 150 is greater, the contact area between the paint droplets attached to the protrusions 141 and the film is smaller, resulting in a smaller diameter and thicker dotted paint layer. It can be seen that by adjusting the gap between the letterpress roller 140 and the back roller 150, the size of the dotted coating can be adjusted.

[0030] Understandably, when the film needs to be dot-coated, the gravure roller 130, the letterpress roller 140, and the back roller 150 can rotate simultaneously. The gravure roller 130 is correspondingly arranged with the material box 200, so that the paint in the material box 200 can be transferred to multiple grooves on the outer wall of the gravure roller 130, ensuring that each groove contains paint. The letterpress roller 140 is located to the left of the gravure roller 130. During the rotation of the letterpress roller 140, multiple protrusions 141 on the outer wall of the letterpress roller 140 can extend into the multiple grooves on the outer wall of the gravure roller 130, ensuring that each protrusion 141 is coated with paint. The film is wound around the back roller 150, and the rotating back roller 150 can move the film. The gap between the back roller 150 and the letterpress roller 140 allows the film to pass through, enabling paint droplets attached to the multiple bumps 141 on the letterpress roller 140 to contact the film. This allows the paint attached to the bumps 141 to be transferred onto the film, forming multiple dots of paint on the film surface. When the size of the dots needs to be adjusted for different film product specifications, the first base 110 can be moved to the left, bringing the letterpress roller 140 closer to the back roller 150, thereby reducing the gap between the letterpress roller 140 and the back roller 150. Reducing the gap between the letterpress roller 140 and the back roller 150 increases the contact area between the paint droplets attached to the bumps 141 and the film, resulting in a larger diameter and a smaller thickness of the formed dots of paint. Alternatively, the first base 110 can be moved to the right, moving the letterpress roller 140 away from the back roller 150, thereby increasing the gap between the letterpress roller 140 and the back roller 150. By increasing the gap between the letterpress roller 140 and the back roller 150, the contact area between the paint droplets adhering to the protrusions 141 and the film decreases, thereby reducing the diameter and increasing the thickness of the formed dotted paint. This dot coating device can adjust the size of the dotted paint according to different specifications of film products, thus improving the coating flexibility of the dot coating device.

[0031] In this embodiment of the invention, the position of the letterpress roller 140 in the left-right direction is adjustable, which also allows for adjustment of the pressure between the letterpress roller 140 and the back roller 150. The pressure between the back roller 150 and the letterpress roller 140 refers to the force exerted on each other's surfaces when the back roller 150 and the letterpress roller 140 are in contact and interact. When the letterpress roller 140 transfers coating onto the film, the pressure between the back roller 150 and the letterpress roller 140 affects the amount of coating transferred, and also allows for adjustment of the size of the dots of coating on the film.

[0032] In one embodiment of the present invention, the dotting device further includes a first slide rail and a first slider. The first slide rail is parallel to the left-right direction and is mounted on the frame 100. The first slider is connected to a first base 110 and is slidably connected to the first slide rail. It is understood that the first base 110 is slidably connected to the first slide rail in the left-right direction via the first slider. In this embodiment of the present invention, the dotting device includes two first slide rails and two first sliders. Both first slide rails are parallel to the left-right direction and are both connected to the frame 100. Both first sliders are mounted on the first base 110 and are slidably connected to the two first slide rails respectively, allowing the first base 110 to slide smoothly in the left-right direction.

[0033] In this embodiment of the invention, the dot coating device further includes a first linear drive mechanism, which is mounted on the frame 100. The output end of the first linear drive mechanism is connected to the first base 110, and the first linear drive mechanism is used to drive the first base 110 to slide in the left-right direction. It is understood that when the size of the dot coating needs to be adjusted according to different specifications of film products, the first linear drive mechanism can drive the first base 110 to move left or right, causing the letterpress roller 140 to move closer to or further away from the back roller 150, thereby reducing or increasing the gap between the letterpress roller 140 and the back roller 150. As one embodiment of the invention, the first linear drive mechanism can be a first screw and nut drive mechanism, which will not be further described here.

[0034] In this embodiment of the invention, the dot coating apparatus further includes a first distance sensor and a first displacement sensor. The first distance sensor is used to detect the gap between the letterpress roller 140 and the back roller 150, and the first displacement sensor is used to detect the displacement of the letterpress roller 140 in the left-right direction. With the cooperation of the first distance sensor, the first displacement sensor, and the first linear drive mechanism, the gap between the letterpress roller 140 and the back roller 150 can be precisely adjusted, as can the pressure between them, and consequently, the size of the dotted coating on the film can be precisely adjusted.

[0035] Referring to Figures 1 and 4, the dotting apparatus further includes a second base 120, which is disposed on the first base 110. A material box 200 is disposed on the second base 120, and a gravure roller 130 is rotatably connected to the second base 120. The second base 120 is configured to be positionally adjustable in the left-right direction, thereby adjusting the gap between the gravure roller 130 and the letterpress roller 140. It is understood that the letterpress roller 140 and the material box 200 are connected to the first base 110 via the second base 120. When the second base 120 moves to the right, the material box 200 and the gravure roller 130 on the second base 120 move to the right together, increasing the gap between the letterpress roller 140 and the gravure roller 130, thus reducing the contact pressure between the plurality of protrusions 141 on the letterpress roller 140 and the gravure roller 130. Reducing the contact pressure between the letterpress roller 140 and the gravure roller 130 effectively reduces wear between them. On the other hand, the reduced contact pressure also decreases the amount of paint transferred to the raised points 141. When the second base 120 moves to the left, the material box 200 and the gravure roller 130 on the second base 120 move to the left together, reducing the gap between the letterpress roller 140 and the gravure roller 130, thus increasing the contact pressure between the raised points 141 on the letterpress roller 140 and the gravure roller 130. This increased contact pressure leads to a corresponding increase in the amount of paint transferred to the raised points 141.

[0036] With the gap between the letterpress roller 140 and the back roller 150 remaining constant, a smaller gap between the letterpress roller 140 and the gravure roller 130 results in an increase in the amount of paint adhering to the bumps 141 on the letterpress roller 140. When the letterpress roller 140 transfers the paint onto the film, larger and thicker dots of paint are formed. Conversely, an increased gap between the letterpress roller 140 and the gravure roller 130 results in a smaller amount of paint transferred to the bumps 141, forming smaller and thinner dots of paint. By moving the second base 120 left and right, not only can the amount of paint transferred from the gravure roller 140 to the letterpress roller 140 be adjusted, but also the size of the dots, further improving the coating flexibility of the dot coating device.

[0037] In one embodiment of the present invention, the dotting device further includes a second slide rail and a second slider. The second slide rail is parallel to the left-right direction and is disposed on the first base 110. The second slider is connected to the second base 120 and is slidably connected to the second slide rail. The dotting device also includes a second linear drive mechanism, which is disposed on the first base 110 and its output end is connected to the second base 120. The second linear drive mechanism is used to drive the second base 120 to slide in the left-right direction. It can be understood that the second base 120 is slidably connected to the second slide rail in the left-right direction via the second slider. In this embodiment of the present invention, the dotting device includes two second slide rails and two second sliders. Both second slide rails are parallel to the left-right direction and are both connected to the first base 110. Both second sliders are disposed on the second base 120 and are slidably connected to the two second slide rails respectively, so that the second base 120 can slide smoothly in the left-right direction. As one embodiment of the present invention, the second linear drive mechanism can be a second lead screw and nut drive mechanism, which will not be described further here.

[0038] In this embodiment of the invention, the dotting device further includes a second distance sensor and a second displacement sensor. The second distance sensor is used to detect the gap between the letterpress roller 140 and the gravure roller 130, and the second displacement sensor is used to detect the displacement of the gravure roller 130 in the left-right direction. With the cooperation of the second distance sensor, the second displacement sensor, and the second linear drive mechanism, the gap between the letterpress roller 140 and the gravure roller 130 can be precisely adjusted, thereby allowing for precise adjustment of the amount of paint transferred.

[0039] In this embodiment of the invention, the dotting device further includes a first motor, a second motor, and a third motor. The first motor is mounted on the second base 120, and its output end is connected to the gravure roller 130, driving the gravure roller 130 to rotate. The second motor is mounted on the first base 110, and its output end is connected to the letterpress roller 140, driving the letterpress roller 140 to rotate. The third motor is mounted on the frame 100, and its output end is connected to the back roller 150, driving the back roller 150 to rotate.

[0040] Referring to Figure 3, the material box 200 includes a material hopper 230 and a first scraper 210. The material hopper 230 is used to store paint, and a portion of the gravure roller 130 is immersed in the paint within the material hopper 230. The first scraper 210 is connected to the material hopper 230 and abuts against the gravure roller 130. The first scraper 210 is used to scrape off excess paint from the outer surface of the gravure roller 130, ensuring that all grooves are filled with paint. It can be understood that a portion of the gravure roller 130 is immersed in the paint within the material hopper 230. When the gravure roller 130 begins to rotate, due to the depth of the grooves on its outer wall, the paint in the material hopper 230 fills the grooves under the combined effect of its viscosity and fluidity. After the gravure roller 130 dips into the paint from the hopper 230, the gravure roller 130 continues to rotate, so that the first scraper 210 can scrape off the excess paint on the outer surface of the gravure roller 130, so that the amount of paint in the multiple grooves can be kept consistent.

[0041] Referring to Figure 3, the material box 200 also includes a second scraper 220, which is connected to the material hopper 230. The second scraper 220 is located below the first scraper 210 and abuts against the gravure roller 130. The second scraper 220 is used to scrape off impurities from the outer surface of the gravure roller 130. It is understood that during the dotting process, the surface of the gravure roller 130 may become contaminated with impurities. These impurities can originate from various sources, such as sediments in the paint, dust particles mixed with the paint, or dried paint residue remaining on the outer surface of the gravure roller 130 from previous dotting processes. The second scraper 220, located below the first scraper 210, can scrape off impurities from the outer surface of the gravure roller 130 as it rotates, keeping the outer surface of the gravure roller 130 clean and ensuring the quality of subsequent dotting. In this embodiment of the invention, the second scraper 220 and the first scraper 210 are arranged along the rotation direction of the gravure roller 130, so that after the gravure roller 130 dips into the paint in the hopper 230, it can first abut against the first scraper 210 and then against the second scraper 220. Further details will not be elaborated here.

[0042] Referring to Figures 1 and 4, the dotting apparatus also includes a tension adjusting roller 160, which is rotatably connected to the frame 100. The tension adjusting roller 160 is located below the back roller 150 and is used for film winding. The tension adjusting roller 160 is configured to be adjustable in the vertical direction so that the tension of the film can be adjusted. It is understood that when it is necessary to increase the tension of the film, the tension adjusting roller 160 can be moved upwards, reducing the gap between the tension adjusting roller 160 and the back roller 150, thereby increasing the tension of the film wound on the tension adjusting roller 160 and the back roller 150. When it is necessary to decrease the tension of the film, the tension adjusting roller 160 can be moved downwards, increasing the gap between the tension adjusting roller 160 and the back roller 150, thereby decreasing the tension of the film wound on the tension adjusting roller 160 and the back roller 150.

[0043] In this embodiment of the invention, the dotting device further includes a third linear drive mechanism and two sliding blocks. Both sliding blocks are slidably connected to the frame 100 in the vertical direction. The two ends of the tension adjusting roller 160 are rotatably connected to the two sliding blocks. The third linear drive mechanism drives the two sliding blocks to move vertically, thereby enabling the tension adjusting roller 160 to move vertically. The third linear drive mechanism can be a third screw and nut drive mechanism, which will not be further elaborated here. As an embodiment of the invention, the dotting device also includes a tension detection and control component. The tension detection and control component can detect the tension of the film. A preset tension value range is set within the tension detection and control component. When the tension of the film is within the preset tension value range, it indicates that the current tension of the film is appropriate. When the tension detection and control component detects that the tension of the film is higher than the preset tension value range, the tension detection and control component controls the third linear drive mechanism to start. The third linear drive mechanism drives the tension adjusting roller 160 to descend away from the back roller 150, thereby reducing the tension of the film and reducing the tension of the film to within the preset tension value range. When the tension detection and control component detects that the tension of the film is lower than the preset tension value range, the tension detection and control component controls the third linear drive mechanism to start. The third linear drive mechanism drives the tension adjustment roller 160 to rise and approach the back roller 150, thereby increasing the tension of the film and enabling the tension of the film to increase to the preset tension value range.

[0044] Referring to Figures 1 and 4, the dot coating apparatus also includes multiple traction rollers 170, all of which are rotatably connected to the frame 100. These traction rollers 170 are used for film winding. It is understood that the multiple traction rollers 170 assist and guide the movement of the film, enabling it to move smoothly.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A dotting device, characterized in that, include: A frame (100) is provided with a first base (110); A material box (200) is disposed on the first base (110) and is used to store paint. A gravure roller (130) is rotatably connected to the first base (110). The outer wall of the gravure roller (130) is evenly distributed with a plurality of grooves. The gravure roller (130) is located on the left side of the material box (200) and is correspondingly arranged to the material box (200) so that the paint in the material box (200) can be transferred to the plurality of grooves. A letterpress roller (140) is rotatably connected to the first base (110). A plurality of protrusions (141) are evenly distributed on the outer wall of the letterpress roller (140). The letterpress roller (140) is located on the left side of the gravure roller (130) and is correspondingly arranged to the gravure roller (130) so that the plurality of protrusions (141) can extend into the plurality of grooves respectively, and the plurality of protrusions (141) are coated with paint. A back roller (150) is rotatably connected to the frame (100). The back roller (150) is used for film winding. The back roller (150) is located on the left side of the letterpress roller (140). The gap between the back roller (150) and the letterpress roller (140) is used for the film to pass through so that the coating adhering to the bumps (141) can be transferred to the film and form dotted coating. The first base (110) is configured to be positionally adjustable in the left-right direction so that the gap between the letterpress roller (140) and the back roller (150) is adjustable, and the size of the dotted coating on the film is adjustable.

2. The dotting device according to claim 1, characterized in that: It also includes a first slide rail and a first slider. The first slide rail is parallel to the left and right direction and is disposed on the frame (100). The first slider is connected to the first base (110) and is slidably connected to the first slide rail.

3. The dotting device according to claim 2, characterized in that: It also includes a first linear drive mechanism, which is disposed on the frame (100). The output end of the first linear drive mechanism is connected to the first base (110). The first linear drive mechanism is used to drive the first base (110) to slide in the left and right direction.

4. The dotting device according to claim 1, characterized in that: It also includes a second base (120) disposed on the first base (110), the material box (200) disposed on the second base (120), the gravure roller (130) being rotatably connected to the second base (120), and the second base (120) being configured to be adjustable in the left-right direction so that the gap between the gravure roller (130) and the letterpress roller (140) is adjustable.

5. The dotting device according to claim 4, characterized in that: It also includes a second slide rail and a second slider. The second slide rail is parallel to the left and right direction and is disposed on the first base (110). The second slider is connected to the second base (120) and can be slidably connected to the second slide rail.

6. The dotting device according to claim 5, characterized in that: It also includes a second linear drive mechanism, which is disposed on the first base (110). The output end of the second linear drive mechanism is connected to the second base (120). The second linear drive mechanism is used to drive the second base (120) to slide in the left and right direction.

7. The dotting device according to claim 1, characterized in that: The material box (200) includes a hopper (230) and a first scraper (210). The hopper (230) is used to store paint. A portion of the gravure roller (130) is immersed in the paint in the hopper (230). The first scraper (210) is connected to the hopper (230) and abuts against the gravure roller (130). The first scraper (210) is used to scrape off excess paint from the outer surface of the gravure roller (130) so that the multiple grooves are filled with paint.

8. The dotting device according to claim 7, characterized in that: The material box (200) further includes a second scraper (220), which is connected to the material bin (230). The second scraper (220) is located below the first scraper (210) and abuts against the gravure roller (130). The second scraper (220) is used to scrape off impurities on the outer surface of the gravure roller (130).

9. The dotting device according to claim 1, characterized in that: It also includes a tension adjusting roller (160) rotatably connected to the frame (100), the tension adjusting roller (160) being disposed below the back roller (150), the tension adjusting roller (160) being used for winding the film, the tension adjusting roller (160) being configured to be adjustable in the vertical direction so that the tension of the film can be adjusted.

10. The dotting device according to claim 1, characterized in that: It also includes multiple traction rollers (170), all of which are rotatably connected to the frame (100) and are used for winding the film.

Images