Back roller cleaning method and device, coating machine

Abstract

The present application relates to the technical field of coating machines, and in particular to a back roller cleaning method and device, and a coating machine. The back roller cleaning method includes the following steps: first, a detection unit is set downstream of the back roller of the coating machine, and the substrate that passes through the back roller and flows through the detection area of ​​the detection unit is detected by the detection unit to obtain the position and shape of the protrusions formed on the substrate. Next, the position and shape of the foreign matter on the back roller are obtained according to the position and shape of the protrusions. Next, the position where the foreign matter is formed on the back roller is cleaned by the cleaning brush of the cleaning unit according to the shape of the foreign matter. The back roller cleaning method of the present application can achieve precise cleaning of foreign matter on the back roller without causing excessive cleaning of the back roller, so as to avoid damage to the roller surface and waste of materials.

Description

Technical Field

[0001] The present application relates to the technical field of coating machines, and in particular to a back roller cleaning method and device, and a coating machine. Background Art

[0002] Coating is an important process in the production of battery pole pieces. The coating process is to output the coating liquid to the substrate wrapped around the back roller through the coating die head. However, during the coating process, dust and other foreign matter will adhere to the roller surface of the back roller, causing the substrate wrapped around the back roller to be lifted up by the foreign matter when the area with foreign matter is formed on the roller surface, forming a raised area shaped like the foreign matter, resulting in unqualified pole pieces formed after coating.

[0003] The current back roller cleaning method usually sets a cleaning roller in contact with the back roller on one side of the back roller, and cleans the back roller surface by rotating the cleaning roller. However, this cleaning method causes excessive cleaning of the position of the back roller without foreign matter, which can easily cause damage to the back roller surface. Summary of the Invention

[0004] The object of the present invention is to provide a roller cleaning method and device, and a coating machine, so as to achieve accurate cleaning of foreign matter on the back roller to a certain extent and avoid damaging the roller surface of the back roller.

[0005] A first aspect of the present invention provides a back roller cleaning method, comprising the following steps:

[0006] Step 100: Disposing a detection unit downstream of the backing roller of the coating machine, detecting the substrate passing through the backing roller and the detection area of ​​the detection unit by the detection unit to obtain the position and shape of the protrusions formed on the substrate;

[0007] Step 200: Obtain the position and shape of the foreign matter on the back roller according to the position and shape of the protrusion;

[0008] Step 300: Using a cleaning brush of a cleaning unit, clean the position of the back roller where foreign matter is formed according to the shape of the foreign matter.

[0009] Furthermore, in the step 100, the detection area is divided into a plurality of detection sub-areas according to the detection accuracy of the detection unit, and the part of the protrusion within the detection sub-area is the protrusion sub-area of ​​the protrusion;

[0010] The shape of the protrusion includes the area of ​​the protrusion and the height of each protrusion sub-region.

[0011] Furthermore, in step 200, the substrate and the back roller have a tangent point A, and the detection area of ​​the detection unit has a position C. When the protrusion on the substrate moves to position C, the foreign matter on the back roller rotates to position B. The distance between the tangent point A and position C is obtained based on the distance between the tangent point A and position B, and combined with the rotation speed of the back roller, the real-time position change of the foreign matter after passing through position B is obtained.

[0012] Furthermore, the detection unit includes a distance measuring device or an imaging device.

[0013] Furthermore, step 300 also includes the following steps:

[0014] A dust collection cover is provided below the cleaning brush, so that multiple dust collection chambers in the dust collection cover are spaced apart along the length direction of the back roller, and the dust collection chamber corresponding to the foreign matter is opened according to the position of the foreign matter along the length direction of the back roller.

[0015] A second aspect of the present invention provides a back roller cleaning device, using any of the above back roller cleaning methods; comprising a detection unit and a cleaning unit;

[0016] The detection unit is used to be arranged downstream of the backing roller of the coater, and the substrate passing around the backing roller passes through the detection area of ​​the detection unit;

[0017] The detection unit is capable of detecting the protrusions formed on the substrate to obtain the position and shape of the protrusions, and obtaining the position of the foreign matter attached to the backing roller and the shape of the foreign matter based on the position and shape of the protrusions;

[0018] The cleaning unit includes a driving mechanism and a cleaning brush. The driving mechanism can drive the cleaning brush to move to the foreign matter, and the driving mechanism can drive the cleaning brush to rotate, so that the cleaning brush wipes and removes the foreign matter according to the shape of the foreign matter.

[0019] Furthermore, the driving mechanism includes a first driving member, a second driving member, a third driving member and a fourth driving member;

[0020] The third driving member is mounted on the driving end of the first driving member through the second driving member, and the cleaning brush is mounted on the driving end of the third driving member through the fourth driving member;

[0021] The fourth driving member is used to drive the cleaning brush to rotate, the third driving member is used to drive the cleaning brush to move along the third direction, the second driving member is used to drive the cleaning brush to move along the second direction, and the first driving member is used to drive the cleaning brush to move along the first direction;

[0022] The first direction, the second direction and the third direction are perpendicular to each other, and the first direction is along the axis of the backing roller.

[0023] Furthermore, the cleaning unit further comprises a dust hood, wherein the dust hood and the cleaning brush are located on the same side of the back roller, and the dust hood is located below the cleaning brush;

[0024] The dust cover is formed with a baffle on one side facing the back roller, the upper end of the baffle extends to the side of the cleaning brush away from the back roller, and the lower end of the baffle extends toward the back roller and is in contact with the back roller;

[0025] A dust suction chamber is formed in the dust suction hood, a dust suction port connected to the dust suction chamber is formed on the pocket baffle, a dust collection port is formed on the back plate of the dust suction hood opposite to the pocket baffle, and the dust suction chamber is connected to the negative pressure device through the dust collection port;

[0026] And / or, the pocket baffle is a flat plate arranged obliquely or the pocket baffle is arc-shaped.

[0027] Furthermore, a flexible layer is provided at the lower end of the pocket baffle, and the pocket baffle is in contact with the roller surface of the back roller through the flexible layer.

[0028] Furthermore, the dust collection cover is sequentially formed with a plurality of dust collection cavities along the length direction of the back roller, and each of the dust collection cavities is correspondingly formed with the dust collection port and the dust collection port;

[0029] And / or, each of the dust collecting ports is provided with a control valve for opening and closing control.

[0030] Furthermore, the cleaning unit further comprises a dust collecting chamber, and the dust collecting port is connected to the negative pressure device through the dust collecting chamber;

[0031] And / or, the dust collecting chamber is a square chamber, or the dust collecting chamber gradually shrinks from one end close to the dust hood to the other end.

[0032] A third aspect of the present application provides a coating machine comprising any one of the above-mentioned back roller cleaning devices.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The back roller cleaning method provided by the present invention includes the following steps: first, a detection unit is set downstream of the back roller of the coater, and the substrate that passes through the back roller and flows through the detection area of ​​the detection unit is detected by the detection unit to obtain the position and shape of the protrusions formed on the substrate. Next, the position and shape of the foreign matter on the back roller are obtained based on the position and shape of the protrusions. Next, the position where the foreign matter is formed on the back roller is cleaned by the cleaning brush of the cleaning unit according to the shape of the foreign matter. The back roller cleaning method of the present application can achieve precise cleaning of foreign matter on the back roller without causing excessive cleaning of the back roller, thereby avoiding damage to the roller surface and waste of materials.

[0035] The present invention also provides a back roller cleaning device using the above method, comprising a detection unit and a cleaning unit. The detection unit is disposed downstream of the back roller and coating die of the coating machine, so that the substrate, after passing through the back roller and coated by the coating die, can flow through the detection area of ​​the detection unit while continuing to be transported downstream. The detection unit detects the substrate after passing through the back roller, determines whether a protrusion is generated on the substrate after passing through the back roller, and when a protrusion is generated on the substrate, obtains the position and shape of the protrusion on the substrate, and obtains the position and shape of the foreign matter on the back roller based on the position and shape of the protrusion. The cleaning unit comprises a cleaning brush and a drive mechanism capable of driving the cleaning brush to move and rotate; after the position and shape of the foreign matter on the back roller are obtained by the detection unit, the drive mechanism can drive the cleaning brush to move to the position where the foreign matter is attached to the back roller, and wipe and remove the foreign matter on the back roller according to the shape of the foreign matter. Therefore, the back roller cleaning device of the present application realizes real-time and accurate wiping of foreign matter on the back roller through the cooperation of the detection unit and the cleaning unit, avoiding the problem of unqualified electrodes after coating caused by the presence of foreign matter on the back roller, and also avoiding material waste and damage to the back roller surface caused by excessive cleaning of the back roller.

[0036] The present invention also provides a coating machine comprising the back roller cleaning device, so that the coating machine also has the beneficial effects of the back roller cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic diagram of the position of the back roller cleaning device provided by an embodiment of the present invention in a coating center;

[0039] Figure 2A schematic structural diagram of a cleaning unit of a back roller cleaning device provided by an embodiment of the present invention in a first state;

[0040] Figure 3 A schematic structural diagram of a cleaning unit of a back roller cleaning device provided by an embodiment of the present invention in a second state;

[0041] Figure 4 A schematic structural diagram of a cleaning unit of a back roller cleaning device provided in an embodiment of the present invention having a dust collecting chamber;

[0042] Figure 5 A schematic diagram of the structure of another dust collecting chamber of the cleaning unit of the back roller cleaning device provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the state in which the cleaning brush in the back roller cleaning device provided by an embodiment of the present invention moves in real time with foreign matter.

[0044] Reference numerals:

[0045] 1-back roller, 11-foreign matter, 2-substrate, 21-protrusion, 3-coating die, 4-detection unit, 5-cleaning unit, 51-first driving member, 52-second driving member, 53-third driving member, 54-fourth driving member, 55-cleaning brush, 56-dust hood, 561-baffle, 562-dust suction chamber, 563-dust suction port, 564-dust collection port, 565-flexible layer, 57-dust collection chamber;

[0046] a-first direction, b-second direction, c-third direction. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0048] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0049] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] Refer to the following Figures 1 to 6 The present invention describes a back roller cleaning method and device, and a coating machine according to some embodiments of the present application.

[0053] A first aspect of the present application provides a back roller cleaning method for cleaning a back roller of a coating machine.

[0054] The back roller cleaning method includes the following steps:

[0055] Step 100: A detection unit is provided downstream of the back roller of the coating machine, and the detection unit detects the substrate passing through the back roller and the detection area of ​​the detection unit to obtain the position and shape of the protrusions formed on the substrate.

[0056] Step 200: Obtain the position and shape of the foreign matter on the back roller according to the position and shape of the protrusion.

[0057] Step 300: Using a cleaning brush of a cleaning unit, clean the position of the back roller where foreign matter is formed according to the shape of the foreign matter.

[0058] In step 100, combining Figure 1 As shown, the detection unit 4 is arranged downstream of the back roller 1, so that the substrate 2 passing through the back roller 1 can flow through the detection area of ​​the detection unit 4 during the process of continuing to be transported downstream, so that the substrate 2 flowing through its detection area can be detected by the detection unit 4 to determine whether there is a protrusion 21 on the substrate 2. When the protrusion 21 exists on the substrate 2, the position and shape of the protrusion 21 formed on the substrate 2 are detected.

[0059] The detection area of ​​the detection unit is divided into multiple detection sub-areas based on its detection accuracy. The protrusions located within the detection area are also divided into multiple protrusion sub-areas based on the division of the detection sub-areas. That is, part of the protrusions within each detection sub-area constitutes a protrusion sub-area of ​​the protrusion. The detection unit can obtain the area of ​​the protrusion through detection; for example, the detection unit can identify the number of detection sub-areas containing protrusions and then calculate the area of ​​the protrusion based on the area of ​​the detection sub-areas. At the same time, the detection unit can also obtain the height of each protrusion sub-area along the thickness direction of the substrate. In other words, the shape of the protrusion includes the area of ​​the protrusion and the height of each protrusion sub-area.

[0060] Preferably, the detection unit may be a distance measuring device, which can detect the distance between it and the substrate surface, and determine whether there is a protrusion on the substrate based on the detected distance and obtain the area of ​​the protrusion and the height of each protrusion sub-area.

[0061] When determining whether there is a protrusion on the substrate, the distance measuring device can compare the distance it detects with the reference distance (i.e., the distance between the distance measuring device and the substrate surface detected when there is no protrusion on the substrate). When the detected distance is not less than the reference distance, it is determined that there is no protrusion on the substrate; when the detected distance is less than the reference distance, it is determined that there is a protrusion on the substrate.

[0062] Preferably, the detection unit can also be an imaging device, which images the substrate in its imaging area (i.e., the detection area) and obtains the position, area, and height of each protrusion sub-area on the substrate based on the imaging results.

[0063] like Figure 1 As shown, in step 200, when the position and shape of the foreign matter 11 on the back roller 1 are obtained by the position and shape of the protrusion 21, the tangent point A between the substrate and the back roller is used as the base point. When the protrusion is transported from point A to position C in the detection area, the foreign matter on the back roller rotates from point A to position B. Since the linear velocity of the protrusion on the substrate is the same as the linear velocity of the foreign matter on the back roller, that is, the distance from the tangent point A to position B is equal to the distance from the tangent point A to position C, and the distance between position C and the tangent point A is known, the distance between position B and the tangent point A can be obtained. Then, combined with the rotation speed of the back roller, the real-time position change of the foreign matter after passing position B can be obtained.

[0064] Since the protrusions 21 on the substrate 2 are formed when the substrate 2 is lifted up by the foreign matter 11 attached to the back roller 1 when it passes around the back roller 1, the shape of the foreign matter on the back roller can be fitted by the shape of the protrusions on the substrate. Therefore, the area information of the foreign matter can be obtained based on the area information of the protrusions, and the height information of each corresponding foreign matter sub-area can be obtained based on the height information of each protrusion sub-area.

[0065] When cleaning the foreign matter by the cleaning brush in step 300, the cleaning unit can move the cleaning brush to each foreign matter sub-region in sequence according to the real-time position of the foreign matter obtained in step 200, and clean the multiple foreign matter sub-regions in sequence, and in the cleaning process, Figure 6 At the same time, when cleaning, the cleaning time of the cleaning brush is increased or the cleaning brush is gradually moved closer to the roller surface of the back roller during the cleaning process according to the height of the foreign body sub-area to be cleaned.

[0066] Therefore, the back roller cleaning method of the present application can achieve accurate cleaning of foreign matter on the back roller without causing excessive cleaning of the back roller, thereby avoiding damage to the roller surface and waste of materials.

[0067] In step 300 of the back roller cleaning method of the present application, a dust collection hood connected to a negative pressure device may be provided below the cleaning brush to remove foreign dust generated during cleaning. Multiple dust collection hoods are provided along the length of the back roller. When cleaning foreign matter, the corresponding dust collection chamber is opened based on the location of the foreign matter along the length of the back roller to perform suction, thereby achieving targeted dust removal and reducing operating costs.

[0068] A second aspect of the present application provides a back roller cleaning device, which uses the back roller cleaning method provided in the first aspect to clean the back roller in the coating machine.

[0069] like Figure 1 As shown, the back roller cleaning device includes a detection unit 4, which is arranged downstream of the back roller 1 and the coating die 3 of the coater, so that the substrate 2 after passing through the back roller 1 and coated by the coating die 3 can flow through the detection area of ​​the detection unit 4 during the process of continuing to be transported downstream, so as to detect the substrate 2 after passing through the back roller 1 through the detection unit 4, and determine whether the substrate 2 has a protrusion 21 after passing through the back roller 1, and when the substrate 2 has a protrusion 21, obtain the position and shape of the protrusion 21 on the substrate 2, and obtain the position and shape of the foreign matter 11 on the back roller 1 according to the position and shape of the protrusion 21.

[0070] In this embodiment, preferably, the detection unit 4 can be a distance measuring device, which can detect the distance between it and the surface of the substrate 2; regarding the determination of whether there is a protrusion 21 on the substrate 2, the distance measuring device is preset with a reference distance, that is, when the surface of the substrate 2 is in a flat state without the protrusion 21, the distance measuring device and the surface of the substrate 2. The distance measuring device can compare the obtained detection distance with the reference distance. If the detection distance is not less than the reference distance, it can be determined that there is no protrusion 21 on the substrate 2; if the detection distance is less than the reference distance, it can be determined that there is a protrusion 21 on the substrate 2.

[0071] In this embodiment, the position of the foreign matter 11 on the backing roller 1 can be obtained by the position of the protrusion 21 on the substrate 2; specifically, as Figure 1 As shown, the substrate 2 and the back roller 1 have a tangent point A, and the detection area of ​​the detection unit 4 has a position C at a predetermined distance from the tangent point A. When the protrusion 21 on the substrate 2 moves from the tangent point A to the position C, the foreign matter 11 on the back roller 1 will rotate from the tangent point A to the position B. Therefore, the arc distance between the position B and the tangent point A can be obtained through the straight-line distance between the position C and the tangent point A, and combined with the rotation speed of the back roller 1, the real-time position change of the position B where the foreign matter 11 is formed after the detection can be obtained.

[0072] In this embodiment, the morphology of the protrusion 21 includes information about the area of ​​the protrusion 21 on the surface of the substrate 2, as well as information about the height of the protrusion subregion within each detection subregion after the detection area is divided into multiple detection subregions based on the detection accuracy of the detection unit 4. Since the protrusion 21 on the substrate 2 is formed by the foreign matter 11 attached to the backing roller 1 when the substrate 2 is lifted by the foreign matter 11 attached to the backing roller 1 as the substrate 2 is wrapped around the backing roller 1, the morphology of the protrusion 21 on the substrate 2 can be used to fit the morphology of the foreign matter 11 on the backing roller 1. In other words, the area information of the protrusion 21 can be used to obtain the area information of the foreign matter 11 on the backing roller 1, and the height information of each protrusion subregion can be used to obtain the height information of each corresponding foreign matter subregion.

[0073] The back roller cleaning device of the present application further comprises a cleaning unit 5, which is combined with Figure 1 and Figure 2 As shown, the cleaning unit 5 includes a cleaning brush 55 and a driving mechanism capable of driving the cleaning brush 55 to move and rotate; after the detection unit 4 obtains the position and shape of the foreign matter 11 on the back roller 1, the driving mechanism can drive the cleaning brush 55 to move to the position where the foreign matter 11 is attached to the back roller 1, and wipe and remove the foreign matter 11 on the back roller 1 according to the shape of the foreign matter 11. Specifically, the driving mechanism can drive the cleaning brush 55 to wipe and remove each sub-area of ​​the foreign matter 11 in turn; when cleaning a foreign matter sub-area, the driving mechanism can drive the cleaning brush 55 to move to the foreign matter sub-area and wipe and remove the foreign matter 11 as shown in FIG. Figure 6 As shown, during the wiping process, it moves synchronously with the back roller 1 and the foreign matter sub-area. At the same time, during the rotating wiping process, its contact time with the cleaning brush 55 can be increased according to the height information of the foreign matter sub-area, or the cleaning brush 55 can be gradually approached to the roller surface of the back roller 1 during the cleaning process to ensure the cleaning effect.

[0074] Therefore, the back roller cleaning device of the present application realizes real-time and precise wiping of foreign matter 11 on the back roller 1 through the cooperation of the detection unit 4 and the cleaning unit 5, avoiding the problem of unqualified pole pieces after coating caused by the presence of foreign matter 11 on the back roller 1, and also avoiding the waste of materials and damage to the roller surface of the back roller 1 caused by excessive cleaning of the back roller 1.

[0075] In this embodiment, preferably, in addition to the above-mentioned distance measuring device, the detection unit 4 may also use an imaging device, and the imaging device is used to image the substrate 2 that passes through the back roller 1 and flows through the imaging area (i.e., the detection area) of the sampling device, so as to obtain the position of the protrusion 21 on the substrate 2 and the height of each protrusion sub-area based on the imaging results.

[0076] In one embodiment of the present application, preferably, Figure 2 and Figure 3 As shown, the driving mechanism of the cleaning unit 5 includes a first driving member 51, a second driving member 52, a third driving member 53 and a fourth driving member 54; wherein, the cleaning brush 55 is mounted on the driving end of the fourth driving member 54, so that the cleaning brush 55 can rotate around its own axis under the drive of the fourth driving member 54; the fourth driving member 54 is mounted on the driving end of the third driving member 53, the third driving member 53 is mounted on the driving end of the second driving member 52, and the second driving member 52 is mounted on the driving end of the first driving member 51, so that the cleaning brush 55 can move along the first direction a, the second direction b and the third direction c perpendicular to each other under the drive of the first, second and third driving members 53, and the position where the foreign matter 11 is attached to the back roller 1 can be within the moving range of the cleaning brush 55 as the back roller 1 rotates, so that the cleaning brush 55 can accurately move to the foreign matter 11 and move with the rotation of the back roller 1 and the foreign matter 11 to clean the foreign matter 11.

[0077] Specifically, when the back roller 1 is arranged horizontally and the axial direction of the back roller 1 is along the horizontal first direction a, the first driving member 51 can drive the cleaning brush 55 to move along the first direction a, so that the cleaning brush 55 can move to any position in the length direction of the back roller 1; the second driving member 52 can drive the cleaning brush 55 to move along the horizontal second direction b, so that the cleaning brush 55 can move back and forth relative to the back roller 1, so as to approach or move away from the roller surface of the back roller 1 in the horizontal direction; the third driving member 53 can drive the cleaning brush 55 to move in the vertical direction, that is, the third direction c, so that the cleaning brush 55 can be raised and lowered relative to the back roller 1; so that when foreign matter 11 is formed at any position of the back roller 1 along its length direction, the cleaning brush 55 can be accurately moved to its position under the drive of the driving mechanism, and the cleaning brush 55 can move with the rotation of the back roller 1 and the foreign matter 11 when wiping and removing the foreign matter 11, so as to maintain the contact state of the cleaning brush 55 with the foreign matter 11.

[0078] In one embodiment of the present application, preferably, Figure 2 and Figure 3As shown, the cleaning unit 5 also includes a dust hood 56, which is located on the same side of the back roller 1 as the cleaning brush 55, and the dust hood 56 is arranged below the cleaning brush 55; a baffle 561 is formed on the side of the dust hood 56 facing the back roller 1, and the upper end of the baffle 561 extends to the side of the cleaning brush 55 away from the back roller 1, and the lower end of the baffle 561 extends toward the back roller 1 and is attached to the back roller 1, so that when the cleaning brush 55 wipes the back roller 1, foreign matter and dust falling from the roller surface can fall between the roller surface and the baffle 561.

[0079] A dust suction chamber 562 connected to the negative pressure device is formed inside the dust hood 56, and a dust suction port 563 connected to the dust suction chamber 562 is formed on the bag baffle 561, so that a suction channel is formed between the bag baffle 561 and the roller surface of the back roller 1, and foreign matter and dust falling from the roller surface can be directionally sucked into the suction channel and sucked into the dust suction chamber 562.

[0080] In this embodiment, the baffle plate 561 can be a flat plate arranged at an angle, facing the cleaning brush 55 upward and catching foreign matter and dust that falls from the roller surface. Alternatively, the baffle plate 561 can be curved, so that the baffle plate 561 can cover a portion of the roller surface of the back roller 1 and the cleaning brush 55 inside, thereby preventing foreign matter and dust that falls from the roller surface from scattering and more thoroughly being sucked into the dust collection chamber 562.

[0081] In this embodiment, preferably, Figure 2 As shown, a flexible layer 565 is provided at the lower end of the pocket baffle 561. The pocket baffle 561 abuts against the back roller 1 via the flexible layer 565, thereby preventing damage to the back roller 1. This also facilitates forming a suction channel between the pocket baffle 561 and the back roller 1, thereby enhancing the negative pressure suction effect. For example, the flexible layer 565 may be an elastic rubber member.

[0082] In this embodiment, preferably, a dust collecting port 564 is provided on the back plate of the dust hood 56 which is arranged opposite to the bag baffle 561, the dust collecting port 564 is connected with the dust suction chamber 562, and the dust suction chamber 562 is connected with the negative pressure device through the dust collecting port 564, so that foreign matter and dust sucked into the dust suction chamber 562 can flow out of the dust suction chamber 562 through the dust collecting port 564.

[0083] More preferably, Figure 4 and Figure 5 As shown, the cleaning unit 5 also includes a dust collecting chamber 57, and the dust suction chamber 562 is connected to the dust collecting chamber 57 through the dust collecting port 564, and is further connected to the negative pressure device through the dust collecting chamber 57, so that the foreign dust sucked into the dust suction chamber 562 can be further sucked into the dust collecting chamber 57 through the dust collecting port 564, so that the foreign dust can be uniformly recovered and processed through the dust collecting chamber 57.

[0084] In this embodiment, preferably, the dust suction chamber 562 can be a square chamber; or the dust suction chamber 562 is a conical chamber, so that the internal diameter of the dust suction chamber 562 gradually shrinks from the side close to the baffle 561 to the side close to the back plate, so that the dust suction chamber 562 near the dust collecting port 564 has a smaller diameter and a greater suction force, so that foreign matter and dust can be sucked from the dust collecting port 564 to the dust collecting chamber 57.

[0085] In this embodiment, preferably, the dust collecting chamber 57 can also be as follows Figure 4 The square chamber shown, or Figure 5 The conical chamber shown in FIG. 5 is a conical chamber, and when the dust collecting chamber 57 is a conical chamber, the conical chamber gradually contracts from one end toward the dust collecting hood 56 to the other end, so that the airflow through the dust collecting chamber 57 is smoother.

[0086] In one embodiment of the present application, preferably, Figure 2 As shown, a plurality of dust collection chambers 562 are sequentially formed in the dust hood 56 along the length of the back roller 1. A plurality of dust collection ports 563 are formed on the baffle plate 561 of the dust hood 56. The plurality of dust collection ports 563 are arranged in a one-to-one correspondence with the plurality of dust collection chambers 562. A plurality of dust collection ports 564 are also formed on the back plate of the dust hood 56. The plurality of dust collection ports 564 are also arranged in a one-to-one correspondence with the plurality of dust collection chambers 562. Further preferably, a control valve is provided at the dust collection port 564 of each dust collection chamber 562 to open or close the dust collection port 564. Therefore, when cleaning the back roller 1, the dust collection ports 564 of multiple dust collection chambers 562 can be opened simultaneously, or according to the different positions of foreign matter 11 along the length of the back roller 1, the dust collection port 564 of the dust collection chamber 562 corresponding to the position can be opened, thereby achieving targeted collection of foreign matter dust and reducing equipment operating costs.

[0087] The third aspect of the present application further provides a coating machine comprising the back roller cleaning device of any of the above embodiments. In this embodiment, the coating machine comprises the back roller cleaning device, so the coating machine has all the beneficial effects of the back roller cleaning device, which will not be described in detail here.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A back roller cleaning method, characterized in that: The following steps are involved: Step 100: Disposing a detection unit downstream of the backing roller of the coating machine, detecting the substrate passing through the backing roller and the detection area of ​​the detection unit by the detection unit to obtain the position and shape of the protrusions formed on the substrate; Step 200: Obtain the position and shape of the foreign matter on the back roller according to the position and shape of the protrusion; Step 300: Using a cleaning brush of a cleaning unit, clean the position of the back roller where foreign matter is formed according to the shape of the foreign matter; In the step 100, the detection area is divided into a plurality of detection sub-areas according to the detection accuracy of the detection unit, and the part of the protrusion within the detection sub-area is the protrusion sub-area of ​​the protrusion; The shape of the protrusion includes the area of ​​the protrusion and the height of each protrusion sub-area; In step 200, the shape of the foreign matter includes the area information of the foreign matter obtained based on the area information of the protrusion, and the height information of each foreign matter sub-region corresponding to the protrusion obtained based on the height information of each protrusion sub-region; In step 300, the cleaning unit moves the cleaning brush to each foreign matter sub-area in turn according to the real-time position of the foreign matter obtained in step 200, and cleans multiple foreign matter sub-areas in turn. At the same time, during cleaning, the cleaning time of the cleaning brush is increased according to the height of the foreign matter sub-area to be cleaned, or the cleaning brush is gradually moved closer to the roller surface of the back roller during the cleaning process.

2. The back roller cleaning method according to claim 1, characterized in that: In step 200, the substrate and the back roller have a tangent point A, and the detection area of ​​the detection unit has a position C. When the protrusion on the substrate moves to position C, the foreign matter on the back roller rotates to position B. The distance between the tangent point A and position C is obtained based on the distance between the tangent point A and position B, and combined with the rotation speed of the back roller, the real-time position change of the foreign matter after passing through position B is obtained.

3. The back roller cleaning method according to claim 1, characterized in that: The detection unit includes a distance measuring device or an imaging device.

4. The back roller cleaning method according to claim 1, characterized in that: Step 300 also includes the following steps: A dust collection hood connected to the negative pressure device is set below the cleaning brush, so that multiple dust collection chambers in the dust collection hood are arranged at intervals along the length direction of the back roller, and the dust collection chamber opposite to the foreign object is opened according to the position of the foreign object in the length direction of the back roller.

5. A back roller cleaning device for implementing the back roller cleaning method according to any one of claims 1 to 4; characterized in that: Including a detection unit and a cleaning unit; The detection unit is used to be arranged downstream of the backing roller of the coater, and the substrate passing around the backing roller passes through the detection area of ​​the detection unit; The detection unit is capable of detecting the protrusions formed on the substrate to obtain the position and shape of the protrusions, and obtaining the position of the foreign matter attached to the backing roller and the shape of the foreign matter based on the position and shape of the protrusions; The cleaning unit includes a driving mechanism and a cleaning brush. The driving mechanism can drive the cleaning brush to move to the foreign matter, and the driving mechanism can drive the cleaning brush to rotate, so that the cleaning brush wipes and removes the foreign matter according to the shape of the foreign matter.

6. The back roller cleaning device according to claim 5, characterized in that: The driving mechanism includes a first driving member, a second driving member, a third driving member and a fourth driving member; The third driving member is mounted on the driving end of the first driving member through the second driving member, and the cleaning brush is mounted on the driving end of the third driving member through the fourth driving member; The fourth driving member is used to drive the cleaning brush to rotate, the third driving member is used to drive the cleaning brush to move along the third direction, the second driving member is used to drive the cleaning brush to move along the second direction, and the first driving member is used to drive the cleaning brush to move along the first direction; The first direction, the second direction and the third direction are perpendicular to each other, and the first direction is along the axis of the backing roller.

7. The back roller cleaning device according to claim 5, characterized in that: The cleaning unit further comprises a dust hood, wherein the dust hood and the cleaning brush are located on the same side of the back roller, and the dust hood is located below the cleaning brush; The dust cover is formed with a baffle on one side facing the back roller, the upper end of the baffle extends to the side of the cleaning brush away from the back roller, and the lower end of the baffle extends toward the back roller and is in contact with the back roller; A dust suction chamber is formed in the dust suction hood, a dust suction port connected to the dust suction chamber is formed on the pocket baffle, a dust collection port is formed on the back plate of the dust suction hood opposite to the pocket baffle, and the dust suction chamber is connected to the negative pressure device through the dust collection port; And / or, the pocket baffle is a flat plate arranged obliquely or the pocket baffle is arc-shaped.

8. The back roller cleaning device according to claim 7, characterized in that: A flexible layer is provided at the lower end of the pocket baffle, and the pocket baffle is in contact with the roller surface of the back roller through the flexible layer.

9. The back roller cleaning device according to claim 7, characterized in that: The dust collection cover is sequentially formed with a plurality of dust collection cavities along the length direction of the back roller, and each of the dust collection cavities is correspondingly formed with the dust collection port and the dust collection port; And / or, each of the dust collecting ports is provided with a control valve for opening and closing control.

10. The back roller cleaning device according to claim 7, characterized in that: The cleaning unit further includes a dust collection chamber, and the dust collection port is connected to the negative pressure device through the dust collection chamber; And / or, the dust collecting chamber is a square chamber, or the dust collecting chamber gradually shrinks from one end close to the dust hood to the other end.

11. A coating machine, characterized in that: The back roller cleaning device comprises the back roller cleaning device according to any one of claims 5 to 10.

Images