Material transfer system and coating machine for sheet metal coating machine based on precise control of coating amount

Abstract

The present invention discloses a material transfer system and a coating machine for a plate coating machine based on precise control of coating amount, and belongs to the field of coating machines. In the material transfer of the present invention, the position on the coating roller surface of the coating roller body that contacts the material distribution roller body is the first line position, and the position on the coating roller surface of the coating roller body that is closest to the axis of the bearing roller body is the second line position; the first line position is lower than the highest end of the coating roller body; the second line position is higher than the lowest end of the coating roller body; the first line position is higher than the second line position; the first line position and the second line position are located on the side of the coating roller body away from the feeding position of the coating object, and in the direction of rotation of the coating roller body, the roller surface distance between the first line position and the second line position is greater than the roller surface distance between the first line position and the lowest end of the coating roller body, so that the material can be fully spread on the coating roller body, thereby improving the uniformity of the material on the coating roller body, and thus still having a good coating effect when the coating amount is large.

Description

Technical Field

[0001] The present invention relates to the technical field, and more particularly to a material transfer system of a plate coating machine and a coating machine based on precise control of coating amount. Background Art

[0002] The metal material used for packaging materials is usually a metal sheet, which needs to be coated to improve the corrosion resistance, tolerance and other properties of the metal material. In the coating equipment for metal sheets, a double-roller structure is generally used to coat the rubber roller, that is, two relatively rotating oil rollers are used to squeeze the material from the gap, and the oil rollers are used to transfer the material to the rubber roller; then the material on the rubber roller is transferred to the metal sheet, and finally the coating is achieved, such as the Chinese patent document with application number 2012206185046.

[0003] The coating amount of existing coating machines with double rollers is usually controlled by changing the gap between the two rollers. However, when the coating thickness of metal sheets is required to be large, more material is often required for materials with low solid content. However, due to the wetting effect and surface tension of the material on the oil roller surface, it is difficult for traditional coating machines to achieve large coating amounts for metal sheets.

[0004] In addition, the coating amount adjustment structure of this double-roller coating machine is relatively complex, and is limited by the processing technology. When the two oil rollers rotate relative to each other, the gap between the two rollers fluctuates to a certain extent. This fluctuation easily makes it impossible to accurately control the coating amount, resulting in a large difference in the coated metal sheet. In order to control the gap between the two rollers during relative rotation, the processing accuracy of the oil roller needs to be greatly improved, which will greatly increase the manufacturing cost of the coating machine.

[0005] In addition, there are also glazing machines in the prior art that use a combination of a doctor blade and an anilox roller to achieve material distribution operations, such as a metal plate offset glazing machine disclosed in a Chinese patent document with patent number 2017218805288. Although this glazing machine can control the amount of varnish applied by the combination of a doctor blade and anilox roller, when the coating amount is large, the material on the anilox roller may be unevenly distributed after passing through the doctor blade due to the wetting effect and surface tension of the material on the surface of the oil roller; in addition, due to the large coating amount, the material on the anilox roller may also be unevenly distributed after being transferred to the rubber roller. Therefore, when using this metal plate offset glazing machine for coating operations with a large coating amount, the difference between the same plate is large and the coating effect is poor. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] The purpose of the present invention is to overcome the deficiency in the prior art that the coating thickness of metal sheets has a large difference on the same plate after the coating process with a large coating amount by the coater, and to provide a material transfer system for a plate coater based on precise control of the coating amount to solve the problem of uneven coating by the coater when the coating amount of the metal sheet is large.

[0008] 2. Technical solution

[0009] In order to achieve the above object, the technical solution provided by the present invention is:

[0010] The material transfer system of a plate coating machine based on precise control of coating amount of the present invention comprises a transfer mechanism, a material distributing mechanism, a coating mechanism and a bearing mechanism; the transfer mechanism is used to transfer the material to the material distributing roller of the distributing mechanism; the material is transferred by the contact between the material distributing roller and the coating roller of the coating mechanism; the coating roller and the bearing roller of the bearing mechanism can rotate relative to each other to convey the object to be coated; the coating roller can transfer the material to the object to be coated when the object to be coated passes between the coating roller and the bearing roller;

[0011] The position on the coating roller surface of the coating roller body that contacts the cloth roller body is a first line position, and the first line position is lower than the highest end of the coating roller body; the position on the coating roller surface of the coating roller body that is closest to the axis of the bearing roller body is a second line position, and the second line position is higher than the lowest end of the coating roller body; the first line position is higher than the second line position;

[0012] The first line position and the second line position are located on a side of the coating roller body away from the coating material feeding position, and in the rotation direction of the coating roller body, the roller surface distance between the first line position and the second line position is greater than the roller surface distance between the first line position and the lowest end of the coating roller body;

[0013] The distance between the second line position and the axis of the bearing roller body is greater than the radius of the bearing roller body.

[0014] Furthermore, the first line position is not lower than the axis of the coating roller body in the vertical direction, and the second line position is lower than the axis of the coating roller body in the vertical direction.

[0015] Furthermore, the plane perpendicular to the axis of the coating roller body is a first plane, the first line position and the second line position are projected in the first plane as a first point position and a second point position respectively, the axis of the coating roller body is projected in the first plane as an axis point position, the line between the first point position and the axis point position is a first line, the line between the second point position and the axis point position is a second line, and the angle between the first line and the second line is 60 to 150°.

[0016] Furthermore, the first line position is flush with the axis of the coating roller body in a direction perpendicular to the ground.

[0017] Furthermore, the shortest distance between the second line position and the bearing roller body is equal to, or approximately equal to, the thickness of the coating object.

[0018] Furthermore, a plurality of material storage portions are provided on the material roller surface of the material roller body, and the plurality of material storage portions are arrayed on the material roller surface.

[0019] Furthermore, the material storage portion is formed on the surface of the cloth roller by laser engraving, laser etching, or chemical etching.

[0020] Furthermore, the material storage portion has a shape of a regular hexagon, a regular quadrilateral, a rhombus, a regular octagon, or a circle; and a plurality of the material storage portions are honeycomb-shaped, or distributed in a chess-grid array on the surface of the material distribution roller.

[0021] Furthermore, at least two material storage areas are provided which are formed by an array of a plurality of material storage parts; the material storage parts in the two material storage areas are different in at least one of shape, size and depth.

[0022] The present invention provides a coating machine, comprising a material transfer system, a coating material feeding mechanism and a coating material discharging mechanism, wherein the material transfer system is the above-mentioned material transfer system.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0025] (1) In the material transfer system of the present invention, the first line position is lower than the highest end of the coating roller body; the second line position is higher than the lowest end of the coating roller body; the first line position is higher than the second line position; the first line position and the second line position are located on the side of the coating roller body away from the feeding position of the coating object, and in the direction of rotation of the coating roller body, the roller surface distance between the first line position and the second line position is greater than the roller surface distance between the first line position and the lowest end of the coating roller body; the material is transferred from the material roller body to the coating roller body at the first line position, and then transferred to the coating object at the second line position as the coating roller body rotates. In the process of the material rotating to the second line position as the coating roller body rotates, the roller surface distance between the first line position and the second line position is extended as much as possible, so that the material can be fully spread on the coating roller body, thereby improving the uniformity of the material on the coating roller body, and then in the case of a large coating amount, the accuracy and uniformity of the material amount on the coating roller body can still be ensured, and finally the coating thickness on the coating object is ensured to have a small plate difference, thereby improving the coating effect.

[0026] (2) In the present invention, the first line position is higher than the axis of the coating roller body, and the second line position is lower than the axis of the coating roller body. Therefore, even when the radius of the cloth roller body and the carrier roller body is equal to or greater than the radius of the coating roller body, the relative positions of the cloth roller body, the coating roller body, and the carrier roller body remain unchanged during the coating process, the cloth roller body will not block the discharge of the coating object after the coating object passes between the coating roller body and the carrier roller body.

[0027] (3) In the present invention, the distance between the first line position and the axis of the carrier roller body is greater than the radius of the carrier roller body, so that there is a gap between the coating roller body and the carrier roller body. Therefore, the coating roller body and the carrier roller body do not need to contact each other, and the coating on the coating roller body will not be transferred to the carrier roller body, so that the non-coated surface of the coated object will not be sticky to the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the material transfer system of the present invention;

[0029] Figure 2 It is a schematic diagram of the first line position and the second limit position in the present invention;

[0030] Figure 3 It is a schematic diagram of the positional relationship between the cloth roller body, the coating roller body, and the bearing roller body in the present invention;

[0031] Figure 4 It is a schematic diagram of the cloth roller adjustment structure in the present invention;

[0032] Figure 5 It is a schematic diagram of the position in which the axis of the cloth roller body and the axis of the coating roller body are flush in a direction perpendicular to the ground in the present invention;

[0033] Figure 6 It is a schematic diagram of different material storage areas on the material distribution roller body in the present invention. DETAILED DESCRIPTION

[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0035] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0036] Reference Figure 1 The material transfer system of this embodiment includes a transfer mechanism 100, a material distributing mechanism 200, a coating mechanism 300 and a carrier mechanism 400. The transfer mechanism 100, the material distributing mechanism 200, the coating mechanism 300 and the carrier mechanism 400 are arranged along the transfer sequence of the material for coating, that is, the transfer mechanism 100 is used to transfer the material to the material distributing mechanism 200, the material distributing mechanism 200 is used to transfer the material to the coating mechanism 300, and the coating mechanism 300 is used to transfer the material to the coating object on the carrier mechanism 400.

[0037] In this embodiment, the object to be coated is a metal sheet or a metal plate, such as a sheet of tinplate or a plate of aluminum. After being transported to the material transfer system by the feeding mechanism, the object to be coated passes between the coating mechanism 300 and the supporting mechanism 400, and during the passing process, the material in the coating mechanism 300 is transferred to the coating surface of the object to be coated, thereby completing the coating operation on the object to be coated.

[0038] Meanwhile, as a general implementation method, the material distributing mechanism 200 may include a material distributing roller 210, the coating mechanism 300 may include a coating roller 310, and the bearing mechanism 400 may include a bearing roller 410. The material distributing roller 210 and the coating roller 310 transfer materials by contact; the coating roller 310 and the bearing roller 410 rotate relative to each other, so that after the coating object is moved to the material transfer system by the feeding mechanism, the relative rotation of the coating roller 310 and the bearing roller 410 provides the power for the coating object to pass between the coating roller 310 and the bearing roller 410.

[0039] In this embodiment, in order to improve the coating effect on the coating object when the coating amount is large, the cloth roller body 210, the coating roller body 310 and the supporting roller body 410 meet a specific positional relationship so that the material can be fully spread and flattened on the coating roller body 310.

[0040] Specifically, refer to Figure 2 and Figure 3 , in order to facilitate the description of the positional relationship between the cloth roller body 210, the coating roller body 310 and the bearing roller body 410, in this embodiment, the position on the coating roller surface of the coating roller body 310 that contacts the cloth roller body 210 is the first line position L1, which is lower than the highest end of the coating roller body 310, that is, the position where the coating roller body 310 contacts the cloth roller body 210 is lower than the highest end of the coating roller body 310; the position on the coating roller surface of the coating roller body 310 that is closest to the axis of the bearing roller body 410 is the second line position L2, which is higher than the lowest end of the coating roller body 310, that is, the matching position of the coating roller body 310 and the bearing roller body 410 is higher than the lowest end of the coating roller body 310. At the same time, the first line position L1 is higher than the second line position L2, that is, the position where the coating roller body 310 contacts the cloth roller body 210 is higher than the matching position of the coating roller body 310 and the bearing roller body 410.

[0041] In addition, the first line position L1 and the second line position L2 are located on the coating roller body 310 at a side away from the coating material feeding position, for example, Figure 2 In the embodiment, the coating object moves along the x-axis direction toward the material transfer system and passes between the coating mechanism 300 and the supporting mechanism 400 in the x-direction; for example, in Figure 3 In the figure, the coating object passes between the coating roller body 310 and the bearing roller body 410 from right to left, and the first line position L1 and the second line position L2 are located on the left side of the coating roller body 310. At the same time, in the direction of rotation of the coating roller body 310, the roller surface distance between the first line position L1 and the second line position L2 is greater than the roller surface distance between the first line position L1 and the lowest end of the coating roller body, and the roller surface distance here refers to the distance moved along the periphery of the coating roller body 310.

[0042] Therefore, after adopting the position setting relationship between the material distribution roller body 210, the coating roller body 310 and the bearing roller body 410 in this embodiment, the material is transferred from the material distribution roller body 210 to the coating roller body 310 at the first line position L1, and then transferred to the coating object at the second line position L2 as the coating roller body 310 rotates. In the process of the material rotating to the second line position L2 as the coating roller body 310, the roller surface distance between the first line position L1 and the second line position L2 is extended as much as possible, so that the material can be fully spread on the coating roller body 310, and the uniformity of the material on the coating roller body 310 is improved, and then in the case of a large coating amount, the accuracy and uniformity of the material amount on the coating roller body 310 can still be ensured, and finally the coating thickness on the coating object is ensured to have a small plate difference, thereby improving the coating effect.

[0043] the following,

[0044] As a specific embodiment, refer to Figure 1The transfer mechanism 100 may include a chamber housing 110 and a scraper. The chamber housing 110 has a chamber for storing materials, which is open toward one side of the cloth roller 210, and a scraper, such as an ink scraper, is provided on the side of the open side of the chamber housing 110. Usually, two scrapers are provided, and the two scrapers are respectively provided on the upper side and the lower side of the open side of the chamber housing.

[0045] The chamber housing 110 is also provided with a third adjusting member 130, which can be adjusted manually or driven by a third driving member. The third driving member can be any one of an air cylinder, an oil cylinder, and a motor. The third adjusting member is used to adjust the distance between the chamber housing 110 and the cloth roller 210. During the coating process, the third adjusting member can drive the chamber housing 110 to move toward the cloth roller 210, so that the scraper member on the open side of the chamber housing contacts the cloth roller 210, and the material in the chamber contacts the cloth roller 210 at a position between the scraper member on the upper side and the scraper member on the lower side and is transferred to the cloth roller 210. Afterwards, the cloth roller 210 rotates relative to the chamber housing 110, and the scraper member scrapes off the excess material on the cloth roller 210, thereby accurately controlling the amount of material on the cloth roller 210.

[0046] The material distributing mechanism 200 includes a material distributing roller 210, a roller driving member 220, and a first receiving sleeve 240. The material distributing roller 210 is provided with a material storage portion for storing materials. The first receiving sleeve 240 is detachably provided on a bracket (not shown in the figure). The first receiving sleeve 240 has two functions: one is to install the bearing of the material distributing roller 210 and to support the material distributing roller 210; the other is to install the roller driving member 220 so that the roller driving member 220 can move synchronously with the material distributing roller 210 relative to the coating roller 310.

[0047] The cloth roller body 210 includes a cloth roller surface 211, a roller shaft 212, a bearing 213 and a transmission part 214. The roller shaft 212 of the cloth roller body 210 is provided with bearings 213 at both ends, and a transmission part 214 can be provided at one end of the cloth roller body 210 to realize the transmission between the motor and the cloth roller body 210.

[0048] There are many ways in which the cloth roller 210 moves relative to the coating roller 310. As an example, refer to Figure 4In this embodiment, a first adjusting member 250 is provided on the first receiving sleeve 240, and the first adjusting member 250 includes a first adjusting disk 251. The first adjusting disk 251 is rotatably connected to the bracket, and the center of the first receiving sleeve 240 is offset from the center of the first adjusting disk 251. Therefore, when the first adjusting disk 251 is rotated relative to the bracket, the center of the first receiving sleeve 240 rotates around the center of the first adjusting disk 251, so that the axis of the distribution roller body 210 rotates around the center of the first adjusting disk 251, and then the relative position between the distribution roller body 210 and the coating roller body 310 is adjusted.

[0049] As a more specific solution of this embodiment, the first adjusting disk 251 is further provided with a first connecting ear 252, and the first connecting ear 252 is hinged with a first connecting rod 253. The first driving member 260 for driving the first adjusting disk 251 to rotate can be a cylinder, an oil cylinder or a motor.

[0050] A rotating component is hingedly connected to the moving end 261 of the first driving member 260, and the rotating component includes at least two connecting arms arranged in different directions. For example, when the rotating component includes two connecting arms, the first connecting arm 262 can be hingedly connected to the moving end 261 of the first driving member 260, and the second connecting arm 263 can be hingedly connected to the first connecting rod 253. When the moving end 261 of the first driving member 260 is moved, the first adjusting disk 251 is driven to rotate through the transmission of the rotating component and the first connecting rod 253, thereby driving the cloth roller body 210 to move relative to the coating roller body 310.

[0051] In addition, since the cloth roller body 210 is large in size and mass, in order to ensure that the travel of each part of the cloth roller body 210 relative to the coating roller body 310 is the same, thereby avoiding a large pressure difference between each part of the cloth roller body 210 and the coating roller body 310 after the cloth roller body 210 contacts the coating roller body 310, thereby reducing the uniformity of the material, a first receiving sleeve 240 can be provided at each end of the cloth roller body 210, and a first adjusting disk 251 can be provided on the first receiving sleeve 240; at the same time, the rotating parts at both ends of the cloth roller body 210 are connected by a synchronous linkage 270, so that the first adjusting disks 251 at both ends of the cloth roller body 210 can rotate synchronously.

[0052] The coating mechanism 300 may include a coating roller body 310, and coating shoulders 330 are provided at both ends of the coating roller body 310. The coating roller body 310 is mounted on a bracket through the coating shoulders 330 at both ends. A transmission gear 340 is provided at one end of the coating roller body 310, and the transmission gear 340 is used to realize the transmission between the driving motor and the coating roller body 310. A rubber cloth is provided on the coating roller surface of the coating roller body 310, and the rubber cloth is used to carry materials.

[0053] In order to facilitate the replacement of the rubber blanket, a mounting groove 320 may be provided on the coating roller surface of the coating roller body 310, and a tensioning structure is provided in the mounting groove 320. When the rubber blanket is installed on the coating roller body 310, the edge of the rubber blanket may be placed in the mounting groove 320, and the tensioning structure is used to tension the rubber blanket on the coating roller body 310. The tensioning structure may specifically be two tensioning shafts arranged opposite to each other, and a clamping mechanism is provided on the tensioning shafts. When tensioning the rubber blanket, the two edges of the rubber blanket may be clamped into the clamping mechanisms of the two tensioning shafts respectively; then, the two tensioning shafts are rotated toward each other to tension the rubber blanket.

[0054] The bearing mechanism 400 may include a bearing roller body 410, and a second receiving sleeve 430 is provided at each end of the bearing roller body 410. The bearing roller body 410 is mounted on the bracket through the second receiving sleeves 430 at both ends. A guide mechanism 420 may be provided on the bearing roller body 410, and the guide mechanism 420 is used to clamp the edge of the coating object and guide the coating object to pass between the coating roller body 310 and the coating roller body 410. A second adjusting member 440 is provided on the second receiving sleeve 430, and the second adjusting member 440 is used to adjust the distance between the bearing roller body 410 and the coating roller body 310.

[0055] Specifically, the second adjusting member 440 may be a structure similar to the first adjusting member in the present embodiment. For example, the second adjusting member 440 may include a second adjusting disk, and the center of the second receiving sleeve 430 is set to deviate from the center of the second adjusting disk. The second adjusting disk is provided with a second connecting ear, and the second connecting ear is connected to the driving member through a corresponding connecting rod, a rotating structure and other mechanisms. When adjusting the bearing roller body 410, the driving member can drive the rotating structure to rotate, and drive the second adjusting disk to rotate through the connecting rod connected to the rotating structure, so that the axis of the bearing roller body 410 moves relative to the coating roller body 310, and then the position between the bearing roller body 410 and the coating roller body 310 is adjusted.

[0056] In this embodiment, specifically regarding the positional relationship between the cloth roller 210, the coating roller 310 and the bearing roller 410, since the cloth roller 210, the coating roller 310 and the bearing roller 410 are relatively large in size and mass, and the sizes of the coating roller 310 and the bearing roller 410 are usually close, in order to prevent the cloth roller 210 from forming an obstacle when the coating object passes between the coating roller 310 and the bearing roller 410 and continues to be transported, the first line position L1 can be not lower than the axis of the coating roller 310 in the vertical direction, and the second line position L2 can be lower than the axis of the coating roller 310 in the vertical direction. The vertical direction can be Figure 2 The y-axis direction is marked in .

[0057] More specifically, in order to facilitate the description of the positional relationship between the cloth roller body 210, the coating roller body 310 and the bearing roller body 410, the plane perpendicular to the axis of the coating roller body 310 is referred to as the first plane in this embodiment, and the first line position L1 and the second line position L2 are projected in the first plane as the first point position D1 and the second point position D2 respectively; at the same time, the axis of the coating roller body 310 is projected in the first plane as the axis point position D0. The line between the first point position D1 and the axis point position D0 is the first line, and the line between the second point position D2 and the axis point position D0 is the second line. The angle α between the first line and the second line can be 60 to 150°, for example, 70°, 80°, 90°, 115°, 135°.

[0058] When the angle between the first connecting line and the second connecting line is less than 60°, the distance between the cloth roller 210 and the coating roller 310 is relatively close, and the cloth roller 210 will block the conveyance of the object to be coated. To solve this problem, the size of the cloth roller 210 can be reduced. At this time, the angle between the first connecting line and the second connecting line is less than 60°, which can also ensure that the cloth roller 210 will not block the conveyance of the object to be coated. However, the cloth roller 210 needs to increase its angular velocity to meet the cloth demand of the coating roller 310, thereby increasing the error of the cloth amount.

[0059] When the angle between the first connecting line and the second connecting line is greater than 150°, the roller surface distance between the first connecting line and the second connecting line is small, and the material cannot be completely spread out as the coating roller body 310 moves from the first connecting line position to the second connecting line, which may easily lead to a large amount of local material on the coating roller body 310, and ultimately lead to a large difference in the coating thickness of the coated object.

[0060] As a further optimization of the positional relationship between the cloth roller body 210, the coating roller body 310 and the bearing roller body 410, refer to Figure 5 , the first line position L1 can also be flush with the axis of the coating roller body 310 in a direction perpendicular to the ground. That is to say, the coating roller body 310 and the cloth roller body 210 can be flush with each other in a direction perpendicular to the ground; at this time, the first line position L1, the axis of the cloth roller body 210 and the axis of the coating roller body 310 are all in a flush state in a direction perpendicular to the ground, and when the first line position L1, the axis of the cloth roller body 210 and the axis of the coating roller body 310 are in a flush state, at the contact line between the coating roller body 310 and the cloth roller body 210, that is, at the first line position L1, the angular velocity direction of the material on the cloth roller body 210 is parallel to its gravity direction, and at this time, the oil film formed by the material on the cloth roller body 210 is easier to break, so that the material is more easily transferred from the cloth roller body 210 to the coating roller body 310.

[0061] the following,

[0062] In the existing coating machines, since the coating amount cannot be accurately controlled, in order to prevent a large difference in coating thickness on the coated object from being the same as that on the plate, the coating roller body 310 is in contact with the supporting roller body 410, and the rubber cloth of the coating roller body 310 is usually made of a material with a high elastic modulus. Therefore, the error caused by the uneven coating amount can be offset by pressing the rubber cloth of the coating roller body 310 against the supporting roller body 410.

[0063] Specifically, after the rubber blanket of the coating roller body 310 is pressed against the carrier roller body 410, the coating object can squeeze the rubber blanket of the coating roller body 310 when passing between the coating roller body 310 and the carrier roller body 410, and the rubber blanket can be pressed against the coating object, thereby eliminating the error caused by uneven coating amount. However, after the coating roller body 310 contacts the carrier roller body 410, part of the material on the coating roller body 310 will inevitably transfer to the carrier roller body 410, and in order to prevent the carrier roller body 410 from bringing the material to the back of the coating object, a corresponding cleaning device is generally provided on the carrier roller body 410.

[0064] On the contrary, in the present embodiment, since the positional relationship among the cloth roller 210, the coating roller 310 and the supporting roller 410 is optimized, the material on the coating roller 310 can be fully spread out and flattened, and the thickness difference of the coating on the coated object is small, so there is no need to set the coating roller 310 in contact with the supporting roller 410.

[0065] As a second embodiment, the distance between the second line position and the axis of the carrying roller body 410 is greater than the radius of the carrying roller body 410, that is, there is no contact between the coating roller body 310 and the carrying roller body 410. At this time, the material on the coating roller body 310 will not be transferred to the carrying roller body 410, so there is no need to set up a cleaning device to clean the carrying roller body 410, which greatly reduces the amount of wastewater / hazardous waste generated.

[0066] As a further optimization, the shortest distance between the second line position L2 and the carrier roller body 410 is equal to the thickness of the object to be coated. When the shortest distance between the second line position L2 and the carrier roller body 410 is equal to the thickness of the object to be coated, the coating roller body 310 contacts the object to be coated during the process of the object to be coated passing between the coating roller body 310 and the carrier roller body 410, and the material can be transferred to the object to be coated.

[0067] Of course, if the shortest distance between the second line position L2 and the carrying roller body 410 is slightly greater than or slightly less than the thickness of the object to be coated, that is, the shortest distance between the second line position L2 and the carrying roller body 410 is roughly equal to the thickness of the object to be coated, the material can also be transferred to the object to be coated while the object to be coated passes between the coating roller body 310 and the carrying roller body 410.

[0068] For example, when the object to be coated is tinplate, the thickness of the tinplate is generally 0.2 mm, and the shortest distance between the second line position L2 and the bearing roller body 410 can be 0.15-0.25 mm. When the shortest distance between the second line position L2 and the bearing roller body 410 is slightly greater than the thickness of the object to be coated, since the second line position L2 is higher than the lowest end of the coating roller body 310, the object to be coated will bend when passing between the coating roller body 310 and the bearing roller body 410, so that the object to be coated can contact with the coating roller body 310 and be driven and transported by the coating roller body 310 and the bearing roller body 410 in relative motion, and the transfer of the material is completed at the same time; when the shortest distance between the second line position L2 and the bearing roller body 410 is slightly less than the thickness of the object to be coated, the object to be coated will press the rubber cloth of the coating roller body 310 when passing between the coating roller body 310 and the bearing roller body 410, and the transfer of the material is completed.

[0069] the following,

[0070] As another embodiment, a plurality of material storage portions 215 may be provided on the material roller surface 211 of the material roller body 210, and the plurality of material storage portions 215 are arranged in an array on the roller surface of the material roller body 210. The plurality of material storage portions 215 together form a portion of the material roller body 210 for storing materials.

[0071] The material storage portion 215 can be formed on the cloth roller surface 211 by laser engraving, laser etching, or chemical etching; other forms of processing methods can also be used. As for the specific processing process, this embodiment will not be repeated.

[0072] The shape of the material storage part 215 can be a regular hexagon, or a regular quadrilateral, a rhombus, a regular octagon, or a circle. On the material distribution roller surface 211, a plurality of material storage parts can be arranged in a honeycomb shape or in a chessboard array.

[0073] In addition, in the existing double-roller coating machine, the distribution difference of the material on the coating roller body 310 is not large during the material distribution process, and usually one coating machine can only realize the coating of one thickness of coating at the same time. However, since the positional relationship between the material distribution roller body 210, the coating roller body 310 and the supporting roller body 410 is optimized, the material on the coating roller body 310 can be fully spread and laid flat, and the present embodiment can realize the precise control of the coating amount, so different material storage parts 215 can be set on the material distribution roller body 210, so that there are multiple areas with different coating amounts on the coating roller body 310.

[0074] Specifically, the material roller 210 may be provided with a plurality of material storage areas, and the material storage parts in every two material storage areas differ in at least one of shape, size, and depth, so that the material amounts that can be stored in the plurality of material storage areas differ, thereby forming a plurality of coatings of different thicknesses on the coating object. This coating method can simultaneously process three coating objects with different requirements for coating thickness, and in addition, this coating method is particularly suitable for use in the process of testing the coating machine.

[0075] More specifically, see Figure 6 Three material storage areas can be provided on the cloth roller body 210. In the three material storage areas, the shapes of the material storage parts are regular hexagons, regular quadrilaterals and rhombuses respectively. Under the action of the surface tension of the coating, material storage parts of different shapes can realize different amounts of material transfer, thereby forming three coatings of different thicknesses on the coating substrate.

[0076] the following,

[0077] In addition to the material transfer system, the present embodiment further provides a coating machine with the material transfer system, and the coating machine also includes a coating material feeding mechanism and a coating material discharging mechanism. When the coating machine of the present embodiment is used for coating processing, the coating thickness of the coating material can be kept at a low plate thickness difference when the coating amount is large, thereby improving the coating effect.

[0078] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A material transfer system for a plate coating machine based on precise control of coating amount, comprising a transfer mechanism, a material distributing mechanism, a coating mechanism and a bearing mechanism; the transfer mechanism is used to transfer materials to a material distributing roller of the distributing mechanism; a plurality of material storage parts are provided on the distributing roller surface of the distributing roller, and a plurality of the material storage parts are arrayed on the distributing roller surface, and the distributing roller and the coating roller of the coating mechanism transfer materials by contact; the coating roller and the bearing roller of the bearing mechanism can rotate relative to each other to convey the object to be coated; the coating roller can transfer materials to the object to be coated when the object to be coated passes between the coating roller and the bearing roller; the characteristics are: The position on the coating roller surface of the coating roller body that contacts the cloth roller body is a first line position, and the first line position is lower than the highest end of the coating roller body; the position on the coating roller surface of the coating roller body that is closest to the axis of the bearing roller body is a second line position, and the second line position is higher than the lowest end of the coating roller body; the first line position is higher than the second line position; The first line position and the second line position are located on a side of the coating roller body away from the coating material feeding position, and in the direction of rotation of the coating roller body, the roller surface distance between the first line position and the second line position is greater than the roller surface distance between the first line position and the lowest end of the coating roller body; the first line position is not lower than the axis of the coating roller body in the vertical direction, and the second line position is lower than the axis of the coating roller body in the vertical direction; The distance between the second line position and the axis of the bearing roller body is greater than the radius of the bearing roller body, and the shortest distance between the second line position and the bearing roller body is equal to, or approximately equal to, the thickness of the coating object.

2. A material transfer system for a plate coating machine based on precise control of coating amount according to claim 1, characterized in that: The plane perpendicular to the axis of the coating roller body is a first plane, the first line position and the second line position are projected into the first point position and the second point position respectively in the first plane, the axis of the coating roller body is projected into the axis point position in the first plane, the line between the first point position and the axis point position is a first line, the line between the second point position and the axis point position is a second line, and the angle between the first line and the second line is 60~150°.

3. The material transfer system for a plate coating machine based on precise control of coating amount according to claim 1, characterized in that: The first line position is flush with the axis of the coating roller body in a direction perpendicular to the ground.

4. The material transfer system for a plate coating machine based on precise control of coating amount according to claim 1, characterized in that: The material storage portion is formed on the surface of the cloth roller by laser engraving, laser etching, or chemical etching.

5. The material transfer system for a plate coating machine based on precise control of coating amount according to claim 1, characterized in that: The material storage portion is in the shape of a regular hexagon, a regular quadrilateral, a rhombus, a regular octagon, or a circle; a plurality of the material storage portions are in a honeycomb shape, or are distributed on the surface of the material distribution roller in a chessboard-like array.

6. A material transfer system for a plate coating machine based on precise control of coating amount according to claim 1, characterized in that: The material distribution roller surface is provided with at least two material storage areas formed by a plurality of material storage part arrays; the material storage parts in the two material storage areas are different in at least one of shape, size and depth.

7. A coating machine, characterized in that: It comprises a material transfer system, a coating material feeding mechanism and a coating material discharging mechanism, and the material transfer system is the material transfer system according to any one of claims 1 to 6.

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