Dispensing device

Abstract

The invention discloses a dispensing device, and relates to the technical field of coating, the dispensing device comprises a rack, and the rack is provided with a first base; the material box is used for storing the coating; a plurality of grooves are evenly distributed in the outer wall of the gravure roller, and the gravure roller is arranged on the left side of the material box and corresponds to the material box; the relief printing roller can be rotationally connected to the first base, and a plurality of convex points are evenly distributed on the outer wall of the relief printing roller; the back roller can be rotationally connected to the rack, and a gap between the back roller and the relief printing roller is used for allowing a film to penetrate through; the first base is configured to be adjustable in position in the left-right direction, so that the size of a gap between the relief printing roller and the back roller is adjustable, and the size of the dot-shaped coating on the film is adjustable. According to the dispensing device, the size of the dotted coating can be adjusted according to film products of different specifications, so that the coating flexibility of the dispensing device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating, in particular to a dot coating device. Background Art

[0002] A dot coating device is a device used to coat the surface of a film, which can coat the coating on the surface of the film in the form of dots to form discrete dot coatings on the film. In the prior art, the dot coating device cannot adjust the size of the dot coating according to the film products of different specifications, which reduces the coating flexibility of the dot coating device. Summary of the invention

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

[0004] The dot coating device according to an embodiment of the present invention includes a frame, a material box, a gravure roller, a relief roller and a back roller. The frame is provided with a first base. The material box is provided on the first base, and the material box is used to store paint; the gravure roller can be rotatably connected to the first base, and a plurality of grooves are evenly distributed on the outer wall of the gravure roller. The gravure roller is provided on the left side of the material box and is arranged corresponding to the material box, so that the paint in the material box can be transferred to the plurality of grooves. The relief roller can be rotatably connected to the first base, and a plurality of convex points are evenly distributed on the outer wall of the relief roller. The relief roller is provided on the left side of the gravure roller and is arranged corresponding to the gravure roller, so that the plurality of convex points can extend into the plurality of grooves respectively, and the plurality of convex points are all attached with paint. The backing roller is rotatably connected to the frame, the backing roller is used for winding the film, the backing roller is arranged on the left side of the relief roller, and the gap between the backing roller and the relief roller is used for the film to pass through, so that the paint attached to the convex points can be transferred to the film and form dot-shaped paint. The first base is configured to be adjustable in the left-right direction, so that the gap between the relief roller and the backing roller is adjustable, and the size of the dot-shaped paint on the film is adjustable.

[0005] At least the following beneficial effects are achieved: When the film needs to be dot-coated, the gravure roller, the relief roller and the back roller can rotate at the same time. The gravure roller is arranged corresponding to the material box, so that the paint in the material box can be transferred to the multiple grooves on the outer wall of the gravure roller, so that the multiple grooves are filled with paint. The relief roller is arranged on the left side of the gravure roller. During the rotation of the relief roller, the multiple convex points on the outer wall of the relief roller can respectively extend into the multiple grooves on the outer wall of the gravure roller, so that the multiple convex points are attached to the paint. The film is wound on the back roller, and the rotating back roller can drive the film to move. The gap between the back roller and the relief roller is used for the film to pass through, so that the paint droplets attached to the multiple convex points on the relief roller can contact the film, and then the paint attached to the multiple convex points can be transferred to the film and form multiple dot-shaped paints on the surface of the film. When the size of the dot-shaped paint needs to be adjusted according to the film products of different specifications, the first base can be moved to the left so that the relief roller is close to the back roller to reduce the gap between the relief roller and the back roller. When the gap between the relief roller and the back roller is reduced, the contact area between the paint droplets attached to the convex points and the film is increased, so that the diameter of the formed dot-shaped paint is increased and the thickness is reduced. Or the first base is moved to the right so that the relief roller is away from the back roller to increase the gap between the relief roller and the back roller. When the gap between the relief roller and the back roller is increased, the contact area between the paint droplets attached to the convex points and the film is reduced, so that the diameter of the formed dot-shaped paint is reduced and the thickness is increased. The dot coating device can adjust the size of the dot-shaped paint according to film products of different specifications, which is conducive to improving the coating flexibility of the dot coating device.

[0006] According to an embodiment of the present invention, the dot coating device further includes a first slide rail and a first slider, wherein the first slide rail is parallel to the left and right directions, the first slide rail is arranged on the frame, the first slider is connected to the first base, and the first slider can be slidably connected to the first slide rail.

[0007] According to an embodiment of the present invention, the dot coating device further includes a first linear drive mechanism, which is disposed on the frame, wherein an output end of the first linear drive mechanism is connected to the first base, and the first linear drive mechanism is used to drive the first base to slide in the left-right direction.

[0008] According to an embodiment of the present invention, the dot coating device further includes a second base, which is arranged on the first base, the material box is arranged on the second base, the gravure roller is rotatably connected to the second base, and the second base is configured to be adjustable in position in the left and right directions so that the gap size between the gravure roller and the relief roller can be adjusted.

[0009] According to an embodiment of the present invention, the dot coating device further includes a second slide rail and a second slider, the second slide rail is parallel to the left and right directions, the second slide rail is arranged on the first base, the second slider is connected to the second base, and the second slider can be slidably connected to the second slide rail.

[0010] According to an embodiment of the present invention, the dot coating device further includes a second linear drive mechanism, which is disposed on the first base, wherein an output end of the second linear drive mechanism is connected to the second base, and the second linear drive mechanism is used to drive the second base to slide in the left-right direction.

[0011] According to the dot coating device of an embodiment of the present invention, the material box includes a material bin and a first scraper, the material bin is used to store paint, part of the gravure roller is immersed in the paint in the material bin, the first scraper is connected to the material bin, the first scraper is against the gravure roller, and the first scraper is used to scrape off excess paint on the outer wall surface of the gravure roller so that the multiple grooves are filled with paint.

[0012] According to the dot coating device of an embodiment of the present invention, the material box also includes a second scraper, the second scraper is connected to the material bin, the second scraper is arranged below the first scraper, the second scraper is against the gravure roller, and the second scraper is used to scrape off impurities on the outer wall surface of the gravure roller.

[0013] According to an embodiment of the present invention, the dot coating device further includes a tension adjusting roller, which is rotatably connected to the frame, and is arranged below the back roller. The tension adjusting roller is used for winding the film, and the tension adjusting roller is configured to be adjustable in position in the up and down directions so that the tensioning force of the film can be adjusted.

[0014] The dot coating device according to the embodiment of the present invention further includes a plurality of traction rollers, wherein the plurality of traction rollers are rotatably connected to the frame, and the plurality of traction rollers are used for winding the film.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A side view schematic diagram of a coating device and a film according to an embodiment of the present invention; Figure 2 Schematic diagram of a relief roller, a backing roller and a film in a dot coating device according to an embodiment of the present invention; Figure 3Schematic diagram of a gravure roller and a material box in a dot coating device according to an embodiment of the present invention; Figure 4 A side view schematic diagram of another state of the dot coating device and the film according to an embodiment of the present invention; Figure Number: Frame 100; first base 110; second base 120; gravure roller 130; relief roller 140; convex point 141; back roller 150; tension adjustment roller 160; traction roller 170; Material box 200; first scraper 210; second scraper 220; material bin 230. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0019] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0020] Reference Figures 1 to 3 The present invention discloses a dot coating device, including a frame 100, a material box 200, a gravure roller 130, a relief roller 140 and a back roller 150.

[0021] The frame 100 is provided with a first base 110, and a material box 200 is provided on the first base 110, and the material box 200 is used to store paint. The gravure roller 130 is rotatably connected to the first base 110, and a plurality of grooves are evenly distributed on the outer wall of the gravure roller 130. The gravure roller 130 is provided on the left side of the material box 200 and is arranged corresponding to the material box 200, so that the paint in the material box 200 can be transferred to the plurality of grooves. The relief roller 140 is rotatably connected to the first base 110, and a plurality of convex points 141 are evenly distributed on the outer wall of the relief roller 140. The relief roller 140 is provided on the left side of the gravure roller 130 and is arranged corresponding to the gravure roller 130, so that the plurality of convex points 141 can extend into the plurality of grooves respectively, and the plurality of convex points 141 are all attached with paint. The back roller 150 is rotatably connected to the frame 100. The back roller 150 is used for winding the film. The back roller 150 is arranged on the left side of the relief roller 140. The gap between the back roller 150 and the relief roller 140 is used for the film to pass through, so that the paint attached to the convex point 141 can be transferred to the film and form a dot-shaped paint. The first base 110 is configured to be adjustable in the left-right direction, so that the distance of the gap between the relief roller 140 and the back roller 150 is adjustable, and the size of the dot-shaped paint on the film is adjustable.

[0022] The gravure roller 130 is rotatably disposed on the first base 110, and the material box 200 is disposed on the first base 110. In the embodiment of the present invention, the gravure roller 130 and the material box 200 are disposed correspondingly, which 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, since the grooves on its surface have a certain depth, the paint in the material box 200 will be filled into the grooves during the rotation of the gravure roller 130, so that the paint in the material box 200 can be transferred to multiple grooves. The relief roller 140 is rotatably disposed on the first base 110, and the rotation direction of the relief roller 140 is opposite to that of the gravure roller 130, so that the multiple convex points 141 on the relief roller 140 can rotate and extend into the multiple grooves on the relief roller 140 respectively. After the convex points 141 extend into the grooves, the convex points 141 will contact the paint in the grooves, so that the paint is attached to the convex points 141. As the relief roller 140 and the gravure roller 130 rotate, the convex point 141 is disengaged from the groove. The back roller 150 can be rotatably arranged on the frame 100, and the back roller 150 is provided for the film to be wound, and the gap between the back roller 150 and the relief roller 140 is used for the film to pass through. As the back roller 150 and the relief roller 140 rotate, the film moves, and the coating attached to the convex point 141 contacts the surface of the film, so that the coating attached to the convex point 141 can be transferred to the surface of the film to form a plurality of dot-shaped coatings on the surface of the film. Specifically, in an embodiment of the present invention, the gravure roller 130 is a rubber roller, and the convex point 141 on the relief roller 140 is against the gravure roller 130 to achieve the transfer of the coating. The gravure roller 130, the relief roller 140 and the material box 200 are common components used for dot coating in the coating field, and will not be further described here. In an embodiment of the present invention, the size of the dot-shaped coatings on the film products of different specifications is also different, and will not be further described here.

[0023] The first base 110 is configured to be positionally adjustable in the left-right direction, that is, the first base 110 can move in the left-right direction on the frame 100, so that the material box 200, the gravure roller 130 and the relief roller 140 can follow the first base 110 to move in the left-right direction, thereby making the gap between the relief roller 140 and the back roller 150 adjustable, that is, the relief roller 140 can be close to or away from the film wound on the back roller 150. Figure 2 , the shaded part in the figure is the paint droplet. When the distance between the relief roller 140 and the film on the back roller 150 is close, the contact area between the paint droplets attached to the convex point 141 and the film is large, so that the diameter of the formed dot paint is large and the thickness is small. When the distance between the relief roller 140 and the film on the back roller 150 is far, the contact area between the paint droplets attached to the convex point 141 and the film is small, so that the diameter of the formed dot paint is small and the thickness is large. It can be seen from this that by adjusting the gap between the relief roller 140 and the back roller 150, the purpose of adjusting the size of the dot paint can be achieved.

[0024] It is understandable that when the film needs to be dot-coated, the gravure roller 130, the relief roller 140 and the back roller 150 can rotate simultaneously. The gravure roller 130 is arranged corresponding to the material box 200, so that the paint in the material box 200 can be transferred to the multiple grooves on the outer wall of the gravure roller 130, so that the multiple grooves are filled with paint. The relief roller 140 is arranged on the left side of the gravure roller 130. During the rotation of the relief roller 140, the multiple convex points 141 on the outer wall of the relief roller 140 can respectively extend into the multiple grooves on the outer wall of the gravure roller 130, so that the multiple convex points 141 are attached with paint. The film is wound on the back roller 150, and the rotating back roller 150 can drive the film to move. The gap between the back roller 150 and the relief roller 140 is used for the film to pass through, so that the coating droplets attached to the multiple convex points 141 on the relief roller 140 can contact the film, and then the coating attached to the multiple convex points 141 can be transferred to the film and form multiple dot-shaped coatings on the surface of the film. When the size of the dot-shaped coating needs to be adjusted according to the film products of different specifications, the first base 110 can be moved to the left so that the relief roller 140 is close to the back roller 150 to reduce the gap between the relief roller 140 and the back roller 150. After the gap between the relief roller 140 and the back roller 150 is reduced, the contact area between the coating droplets attached to the convex points 141 and the film is increased, so that the diameter of the formed dot-shaped coating is increased and the thickness is reduced. Or the first base 110 is moved to the right so that the relief roller 140 is away from the back roller 150 to increase the gap between the relief roller 140 and the back roller 150. When the gap between the relief roller 140 and the back roller 150 is increased, the contact area between the coating droplets attached to the convex points 141 and the film is reduced, so that the diameter of the formed dot coating is reduced and the thickness is increased. The dot coating device can adjust the size of the dot coating according to the film products of different specifications, which is conducive to improving the coating flexibility of the dot coating device.

[0025] In the embodiment of the present invention, the position of the relief roller 140 in the left-right direction is adjustable, and the pressure between the relief roller 140 and the back roller 150 can also be adjusted. The pressure between the back roller 150 and the relief roller 140 refers to the force exerted on each other's surface when the back roller 150 and the relief roller 140 are in contact and interact with each other. When the relief roller 140 transfers the paint to the film, the pressure between the back roller 150 and the relief roller 140 affects the transfer amount of the paint, and the size of the dot-shaped paint on the film can also be adjusted.

[0026] As an embodiment of the present invention, the dot coating device also includes a first slide rail and a first slider, the first slide rail is parallel to the left and right directions, the first slide rail is arranged on the frame 100, the first slider is connected to the first base 110, and the first slider can be slidably connected to the first slide rail. It can be understood that the first base 110 can be slidably connected to the first slide rail along the left and right directions through the first slider. In an embodiment of the present invention, the dot coating device includes two first slide rails and two first sliders, the two first slide rails are parallel to the left and right directions and are connected to the frame 100, the two first sliders are arranged on the first base 110, and the two first sliders can be slidably connected to the two first slide rails, respectively, so that the first base 110 can slide smoothly along the left and right directions.

[0027] In an embodiment of the present invention, the dot coating device further includes a first linear drive mechanism, which is disposed on the frame 100, and 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 and right directions. It can be understood that when the size of the dot coating needs to be adjusted according to the film products of different specifications, the first linear drive mechanism can drive the first base 110 to move left or right, so that the relief roller 140 is close to or away from the back roller 150, so as to reduce or increase the gap between the relief roller 140 and the back roller 150. As an embodiment of the present invention, the first linear drive mechanism can be a first screw nut drive mechanism, which will not be further described here.

[0028] In an embodiment of the present invention, the dot coating device further includes a first distance sensor and a first displacement sensor. The first distance sensor is used to detect the gap between the relief roller 140 and the back roller 150, and the first displacement sensor is used to detect the displacement of the relief roller 140 in the left and right directions. With the cooperation of the first distance sensor, the first displacement sensor and the first linear drive mechanism, the gap between the relief roller 140 and the back roller 150 can be precisely adjusted, and the pressure between the relief roller 140 and the back roller 150 can also be precisely adjusted, thereby making the size of the dot coating on the film precisely adjustable.

[0029] refer to Figure 1 and Figure 4The dot coating device further includes a second base 120, the second base 120 is arranged on the first base 110, the material box 200 is arranged on the second base 120, the gravure roller 130 can be rotatably connected to the second base 120, and the second base 120 is configured to be adjustable in position in the left and right directions so that the gap between the gravure roller 130 and the relief roller 140 can be adjusted. It can be understood that the relief roller 140 and the material box 200 are connected to the first base 110 through 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, so that the gap between the relief roller 140 and the gravure roller 130 increases, that is, the contact pressure between the multiple convex points 141 on the relief roller 140 and the gravure roller 130 is reduced. After the contact pressure between the relief roller 140 and the gravure roller 130 is reduced, the wear between the relief roller 140 and the gravure roller 130 can be effectively reduced. On the other hand, when the contact pressure between the relief roller 140 and the gravure roller 130 is reduced, the coating transferred to the convex points 141 will also be reduced accordingly. 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, so that the gap between the relief roller 140 and the gravure roller 130 is reduced, that is, the contact pressure between the multiple convex points 141 on the relief roller 140 and the gravure roller 130 is increased. When the contact pressure between the relief roller 140 and the gravure roller 130 is increased, the coating transferred to the convex points 141 will also be increased accordingly.

[0030] When the gap between the relief roller 140 and the back roller 150 remains unchanged, the gap between the relief roller 140 and the gravure roller 130 becomes smaller, so that the amount of paint attached to the convex point 141 on the relief roller 140 increases, and when the relief roller 140 transfers the paint to the film, a dot-shaped paint with a larger diameter and a larger thickness is formed. On the contrary, when the gap between the relief roller 140 and the gravure roller 130 increases, the amount of paint transferred to the convex point 141 decreases, and a dot-shaped paint with a smaller diameter and a smaller thickness is formed. By moving the second base 120 left and right, not only the amount of paint transferred from the gravure roller 140 to the relief roller 140 can be adjusted, but also the size of the dot-shaped paint can be adjusted, further improving the coating flexibility of the dot coating device.

[0031] As an embodiment of the present invention, the dot coating device also includes a second slide rail and a second slider, the second slide rail is parallel to the left and right directions, the second slide rail is arranged on the first base 110, the second slider is connected to the second base 120, and the second slider can be slidably connected to the second slide rail. The dot coating device also includes a second linear drive mechanism, the second linear drive mechanism is arranged on the first base 110, the output end of the second linear drive mechanism is connected to the second base 120, and the second linear drive mechanism is used to drive the second base 120 to slide in the left and right directions. It can be understood that the second base 120 can be slidably connected to the second slide rail in the left and right directions through the second slider. In an embodiment of the present invention, the dot coating device includes two second slide rails and two second sliders, the two second slide rails are parallel to the left and right directions and are connected to the first base 110, the two second sliders are arranged on the second base 120, and the two second sliders can be slidably connected to the two second slide rails, so that the second base 120 can slide smoothly in the left and right directions. As an embodiment of the present invention, the second linear drive mechanism may be a second screw nut drive mechanism, which will not be further described here.

[0032] In the embodiment of the present invention, the dot coating device further includes a second distance sensor and a second displacement sensor. The second distance sensor is used to detect the gap size between the relief roller 140 and the gravure roller 130, and the second displacement sensor is used to detect the displacement amount of the gravure roller 130 in the left and right directions. With the cooperation of the second distance sensor, the second displacement sensor and the second linear drive mechanism, the gap size between the relief roller 140 and the gravure roller 130 can be precisely adjusted, and thus the transfer amount of the coating can be precisely adjusted.

[0033] In an embodiment of the present invention, the dot coating device further includes a first motor, a second motor and a third motor. The first motor is arranged on the second base 120, and the output end of the first motor is connected to the gravure roller 130, and the first motor is used to drive the gravure roller 130 to rotate. The second motor is arranged on the first base 110, and the output end of the second motor is connected to the relief roller 140, and the second motor is used to drive the relief roller 140 to rotate. The third motor is arranged on the frame 100, and the output end of the third motor is connected to the back roller 150, and the third motor is used to drive the back roller 150 to rotate.

[0034] refer to Figure 3The material box 200 includes a material bin 230 and a first scraper 210. The material bin 230 is used to store paint. A portion of the gravure roller 130 is immersed in the paint in the material bin 230. The first scraper 210 is connected to the material bin 230. The first scraper 210 is against the gravure roller 130. The first scraper 210 is used to scrape off the excess paint on the outer wall surface of the gravure roller 130 so that the multiple grooves are filled with paint. It can be understood that a portion of the gravure roller 130 is immersed in the paint in the material bin 230. When the gravure roller 130 starts to rotate, since the groove on the outer wall of the gravure roller 130 has a certain depth, the paint in the material bin 230 will be filled into the groove under the combined effect of its own viscosity and fluidity. After the gravure roller 130 takes the paint from the material bin 230, the gravure roller 130 keeps rotating, so that the first scraper 210 can scrape off the excess paint on the outer wall surface of the gravure roller 130, so that the amount of paint in the multiple grooves can be kept consistent.

[0035] refer to Figure 3 , the material box 200 also includes a second scraper 220, the second scraper 220 is connected to the material bin 230, the second scraper 220 is arranged below the first scraper 210, the second scraper 220 is against the gravure roller 130, and the second scraper 220 is used to scrape off impurities on the outer wall surface of the gravure roller 130. It is understandable that during the spot coating process, the surface of the gravure roller 130 may be contaminated with some impurities. There are many sources of these impurities, which may be sediments in the paint, dust particles mixed into the paint, or paint dried products remaining on the outer wall surface of the gravure roller 130 during the previous spot coating process. The second scraper 220 is arranged below the first scraper 210, and the second scraper 220 can scrape off impurities on the outer wall surface of the gravure roller 130 during the rotation of the gravure roller 130 to keep the outer wall surface of the gravure roller 130 clean to ensure the subsequent spot coating quality. In an embodiment of the present 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 the paint from the silo 230, it can first be against the first scraper 210 and then against the second scraper 220. No further details will be given here.

[0036] refer to Figure 1 and Figure 4The coating device further includes a tension adjustment roller 160, which is rotatably connected to the frame 100, and is disposed below the backing roller 150. The tension adjustment roller 160 is used for winding the film, and the tension adjustment roller 160 is configured to be adjustable in the up and down directions so that the tension of the film can be adjusted. It can be understood that when the tension of the film needs to be increased, the tension adjustment roller 160 can be moved upward to reduce the gap between the tension adjustment roller 160 and the backing roller 150, thereby increasing the tension of the film wound on the tension adjustment roller 160 and the backing roller 150. When the tension of the film needs to be reduced, the tension adjustment roller 160 can be moved downward to increase the gap between the tension adjustment roller 160 and the backing roller 150, thereby reducing the tension of the film wound on the tension adjustment roller 160 and the backing roller 150.

[0037] In an embodiment of the present invention, the coating device further includes a third linear drive mechanism and two sliding blocks, both of which can be connected to the frame 100 in a sliding manner in the up-down direction, and the two ends of the tension adjustment roller 160 can be rotatably connected to the two sliding blocks respectively, and the third linear drive mechanism is used to drive the two sliding blocks to move up and down, thereby enabling the tension adjustment roller 160 to move in the up-down direction. The third linear drive mechanism can be a third screw nut drive mechanism, which will not be further described here. As an embodiment of the present invention, the coating device further includes a tension detection control component, which can detect the tension of the film, and a preset tension value range is set in the tension detection control component. When the tension of the film is within the preset tension value range, it means that the current tension of the film is appropriate. When the tension detection control component detects that the tension of the film is higher than the preset tension value range, the tension detection control component controls the third linear drive mechanism to start, and the third linear drive mechanism drives the tension adjustment roller 160 to drop away from the back roller 150, thereby reducing the tension of the film, so that the tension of the film can be reduced to within the preset tension value range. When the tension detection control component detects that the tension of the film is lower than the preset tension value range, the tension detection control component controls the third linear drive mechanism to start, and the third linear drive mechanism drives the tension adjustment roller 160 to rise close to the back roller 150, thereby increasing the tension of the film, so that the tension of the film can be increased to within the preset tension value range.

[0038] refer to Figure 1 and Figure 4 The dot coating device further includes a plurality of traction rollers 170, which are rotatably connected to the frame 100 and are used for winding the film. It can be understood that the plurality of traction rollers 170 are used for winding the film, and the plurality of traction rollers 170 assist and guide the movement of the film, so that the film can move smoothly.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0040] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A dot coating device, characterized in that: include: A frame (100), wherein a first base (110) is provided on the frame (100); A material box (200), the material box (200) being arranged on the first base (110), the material box (200) being used for storing paint; a gravure roller (130), the gravure roller (130) being rotatably connected to the first base (110), a plurality of grooves being evenly distributed on an outer wall of the gravure roller (130), the gravure roller (130) being arranged on the left side of the material box (200) and corresponding to the material box (200), so that the paint in the material box (200) can be transferred to the plurality of grooves; a relief roller (140), the relief roller (140) being rotatably connected to the first base (110), a plurality of convex points (141) being evenly distributed on an outer wall of the relief roller (140), the relief roller (140) being arranged on the left side of the gravure roller (130) and corresponding to the gravure roller (130), so that the plurality of convex points (141) can respectively extend into the plurality of grooves, and coating is attached to the plurality of convex points (141); a back roller (150), the back roller (150) being rotatably connected to the frame (100), the back roller (150) being used for winding a film, the back roller (150) being arranged on the left side of the relief roller (140), the gap between the back roller (150) and the relief roller (140) being used for allowing the film to pass through, so that the coating material attached to the convex points (141) can be transferred to the film and form dot-shaped coating materials; The first base (110) is configured to be positionally 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 the dot-shaped paint on the film is adjustable.

2. The dot coating 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 directions, the first slide rail is arranged on the frame (100), the first slider is connected to the first base (110), and the first slider is slidably connected to the first slide rail.

3. The dot coating device according to claim 2, characterized in that: It also comprises a first linear drive mechanism, the first linear drive mechanism is arranged 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.

4. The dot coating device according to claim 1, characterized in that: The invention also comprises a second base (120), wherein the second base (120) is arranged on the first base (110), the material box (200) is arranged on the second base (120), the gravure roller (130) is rotatably connected to the second base (120), and the second base (120) is configured to be adjustable in position in the left-right direction so that the size of the gap between the gravure roller (130) and the relief roller (140) can be adjusted.

5. The dot coating 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-right direction, the second slide rail is arranged on the first base (110), the second slider is connected to the second base (120), and the second slider can be slidably connected to the second slide rail.

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

7. The dot coating device according to claim 1, characterized in that: The material box (200) comprises a material bin (230) and a first scraper (210); the material bin (230) is used to store paint; a portion of the gravure roller (130) is immersed in the paint in the material bin (230); the first scraper (210) is connected to the material bin (230); the first scraper (210) is against the gravure roller (130); the first scraper (210) is used to scrape off excess paint on the outer wall surface of the gravure roller (130) so that the plurality of grooves are filled with paint.

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

9. The dot coating device according to claim 1, characterized in that: It also includes a tension adjustment roller (160), which is rotatably connected to the frame (100), and is arranged below the back roller (150). The tension adjustment roller (160) is used for winding the film, and the tension adjustment roller (160) is configured to be adjustable in position in the up and down directions so that the tension of the film can be adjusted.

10. The dot coating device according to claim 1, characterized in that: It also comprises a plurality of traction rollers (170), wherein the plurality of traction rollers (170) are all rotatably connected to the frame (100), and the plurality of traction rollers (170) are all used for winding the film.

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