Roller coater

Abstract

The invention discloses a roller coater, and relates to the field of metallurgical mechanical equipment, the roller coater comprises a rack, a steering device and two sets of front roller coating devices, the steering device and the two sets of front roller coating devices are arranged on the rack, the steering device is used for steering a material to be subjected to roller coating, and the two sets of front roller coating devices are sequentially arranged in the moving direction of the material to be subjected to roller coating; the front side roller coating device comprises a supporting back roller and a front side coating mechanism, the front side roller coating device has a coating working state and a color changing standby state, and in the coating working state, the front side coating mechanism is close to the supporting back roller and makes contact with materials to be subjected to roller coating; in a color changing standby state, the front surface coating mechanism is far away from the supporting back roller and is separated from a material to be subjected to roller coating; the roller coater has a standby state and a coating state, and in the standby state, the two sets of front roller coating devices are both in a color changing standby state; and in a coating state, the two sets of front roller coating devices are respectively in a color changing standby state and a coating working state. The roller coater has the non-stop color changing function, and the roller coating construction efficiency of the continuous strip-shaped materials can be improved.

Description

Technical Field

[0001] The invention relates to the field of metallurgical mechanical equipment, in particular to a roller coating machine. Background Art

[0002] Color coated sheet, also known as color sheet or organic coating sheet, refers to the coating product obtained by applying organic coating to the surface of steel sheet. Color coated sheet has the advantages of both organic polymer and steel sheet. It has good coloring, formability and corrosion resistance of organic polymer, and mechanical strength and easy processing performance of steel sheet. It can be punched, bent, deep drawn, riveted, welded and other processing relatively easily. Color coated sheet is generally produced on a professional production line. Its products do not need to be painted after making various products in various industries, which effectively reduces the manufacturing cost of various processing industries. Color coated sheet is widely used in various industries such as construction, home appliances, and automobiles.

[0003] The raw materials used in the color coating unit are usually galvanized steel sheets. The whole line equipment is generally divided into the inlet section equipment, process section equipment, and outlet section equipment. Among them, the inlet section equipment includes coil transport car, uncoiler, inlet pinch roller, double-layer hydraulic shear, steering pinch roller, convergence pinch roller, stitching machine, deburring machine, inlet looper, etc. The process section equipment includes degreasing equipment, brushing equipment, rinsing equipment, chemical coating machine, chemical coating drying furnace, primary coating machine, primary coating curing furnace, fine coating machine, fine coating curing furnace, water quenching cooling equipment, etc. The outlet section equipment includes outlet looper, outlet shear, outlet pinch roller, coiler, unloading car, etc.

[0004] Roller coater is the core functional equipment of the coating process in the process section of the color coating unit, and plays a vital role in the production of the entire production line.

[0005] At present, in order to achieve the function of fast color change, two fine coating machines are generally set on the mainstream color coating unit. The 1# fine coating machine and the 2# fine coating machine are arranged vertically up and down and distributed in two independent rooms. The 1# fine coating machine includes a front coating head and adopts a two-roller arrangement; the 2# fine coating machine includes a front coating head and a back coating head, both of which adopt a two-roller arrangement. The front and back coating heads are both set on linear guides. When the steel plate connection part passes, the hydraulic cylinder controls the movement of the two coating heads to make the coating roller leave the steel plate to avoid the coating roller being scratched by the steel plate connection part. The support roller is equipped with a fixed scraper, and a hydraulic cylinder is provided under the lifting roller to lift the height of the strip steel at the roller. The front and back coating heads are each equipped with a paint tray, and the height of the paint tray can be adjusted by a hand-cranked lifter; the paint tray liquid level is stably supplied to the lifting roller through the liquid level holding device and the paint supply pump. Each lifting roller and coating roller is driven by an AC variable frequency motor. When in use, the coating method is changed by changing the rotation speed and direction of each coating roller; and the pressure between the steel plate and the coating roller, and between the coating roller and the lifting roller is fine-tuned by adjusting the ball screw through the hand-cranked mechanism to control the thickness and surface quality of the coating.

[0006] However, the traditional roller coating machine has the following disadvantages in terms of unit efficiency and product quality: 1# fine coating machine and 2# fine coating machine are arranged in two separate rooms. Although they can meet the purpose of fast color change, workers and paint need to go in and out of the two rooms repeatedly, which is labor-intensive; 1# fine coating machine and 2# fine coating machine are arranged separately, the equipment combination is huge, heavy, and the investment cost is high; 1# fine coating machine and 2# fine coating machine are arranged separately, and two sets of control systems need to be set up, which is not conducive to centralized control; the front coating head adopts a two-roller type, and the means for adjusting the coating film thickness error are limited; steel plate and The pressure between the coating roller, coating roller and lifting roller is adjusted by adjusting the ball screw through the hand-cranked mechanism, which is not conducive to operation and difficult to adjust. It needs to be adjusted repeatedly and cannot be automatically produced; the support roller adopts a fixed scraper, which cannot be replaced online; the lifting roller only has an avoidance hydraulic cylinder, which cannot be fine-tuned during normal production and cannot be fine-tuned during continuous production, resulting in product defects; the height of the material tray of the front and back coating heads is adjusted by a hand-cranked lift, and the manual operation error is large, and it is easy for workers to cause safety accidents during normal operation. These disadvantages have greatly limited the applicability of the roller coating machine. Summary of the invention

[0007] The object of the present invention is to provide a roller coater which can solve at least one of the above problems of the conventional roller coater and improve the applicability of the roller coater.

[0008] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0009] The present invention provides a roller coating machine, which is used for coating continuous strip materials. The roller coating machine comprises a frame, a steering device and two sets of front roller coating devices arranged on the frame. The steering device is used to turn the material to be coated. The two sets of front roller coating devices are arranged in sequence along the moving direction of the material to be coated. The front roller coating device comprises a supporting back roller and a front coating mechanism. The front roller coating device has a coating working state and a color-changing standby state. In the coating working state, the front coating mechanism is close to the supporting back roller and contacts the material to be coated. In the color-changing standby state, the front coating mechanism is away from the supporting back roller and separated from the material to be coated. The roller coating machine has a standby state and a coating state. In the standby state, the two sets of front roller coating devices are both in a color-changing standby state. In the coating state, one of the two sets of front roller coating devices is in a color-changing standby state, and the other of the two sets of front roller coating devices is in a coating working state.

[0010] Preferably, the two sets of front roller coating devices are completely staggered in the direction of gravity.

[0011] Preferably, a scraper assembly cooperating with the supporting back roller is arranged on the frame, and the scraper assembly includes a worm gear reducer, a scraper pressure plate, a scraper blade and a traction roller. The worm gear reducer, the scraper pressure plate and the scraper blade form a whole and are arranged on the traction roller. The scraper assembly is detachably connected to the frame.

[0012] Preferably, the front coating mechanism includes a first guide rail, a front coating head and a first driving member, the first guide rail is arranged on the frame, the front coating head is slidably connected to the first guide rail, and the first driving member is used to drive the front coating head to move along the first guide rail so that the front coating head is close to or away from the supporting back roller.

[0013] Preferably, the front coating head includes a first coating roller, a first feeding roller, a first metering roller, a first rotating drive member and a first movable drive member. The first coating roller, the first feeding roller and the first metering roller are arranged in contact with each other in sequence. The first coating roller, the first feeding roller and the first metering roller are correspondingly connected with the first rotating drive member and the first movable drive member. The first rotating drive member is used to drive the roller connected to it to rotate, and the first movable drive member is used to drive the roller connected to it to move so as to adjust the pressure between the rollers. In the coating working state, the first coating roller is in contact with the material to be coated.

[0014] Preferably, the front coating head also includes a metering roller pressure sensor, a feeding roller pressure sensor and a coating roller pressure sensor electrically connected to the first movable driving member on the corresponding roller, the metering roller pressure sensor is used to measure the pressure between the first metering roller and the first feeding roller, the feeding roller pressure sensor is used to measure the pressure between the first feeding roller and the first coating roller, and the coating roller pressure sensor is used to measure the pressure between the first coating roller and the material to be coated. When each pressure sensor detects that the pressure value is inconsistent with its corresponding preset value, the first movable driving member electrically connected to each pressure sensor starts to move so that the pressure value of each pressure sensor tends to change toward its corresponding target preset value.

[0015] Preferably, the roller coating machine also includes a back roller coating device arranged on the frame, and the back roller coating device includes a back coating mechanism and a lifting mechanism, and the lifting mechanism is used to support the material to be roller coated at the back coating mechanism. In the standby state, the lifting mechanism is in a high position, and the back coating mechanism is separated from the material to be roller coated; in the coating state, the lifting mechanism is in a low position, and the back coating mechanism is in contact with the material to be roller coated.

[0016] Preferably, the lifting mechanism includes a lifting roller, an avoidance hydraulic cylinder, a worm gear lifting assembly and a guide assembly, the avoidance hydraulic cylinder is connected between the output end of the worm gear lifting assembly and the lifting roller, the guide assembly has a meshing gear and a rack, the rack is fixedly connected to the frame, the lifting roller is coaxially connected to the gear, and the material to be rolled is carried on the lifting roller.

[0017] Preferably, the back coating mechanism comprises a connected back coating head and a second driving member, wherein the second driving member is used to drive the back coating head to move along the gravity direction so as to make the back coating head approach or move away from the material to be roll-coated.

[0018] Preferably, the back coating head includes a second coating roller, a second feeding roller, a second rotating drive member and a second movable drive member. The second coating roller and the second feeding roller are arranged in contact with each other. The second coating roller and the second feeding roller are respectively connected to the second rotating drive member. The second feeding roller is also connected to the second movable drive member. The second rotating drive member is used to drive the roller connected to it to rotate, and the second movable drive member is used to drive the second feeding roller to move so as to adjust the inter-roller pressure between the second feeding roller and the second coating roller. In the coating state, the second coating roller is in contact with the material to be coated.

[0019] Preferably, the roller coater also includes a material tray mechanism, and the material tray mechanism is arranged under the first lifting roller and the second lifting roller. In the color changing standby state, the material tray mechanism is in the standby position, and the first lifting roller and the second lifting roller have a preset distance from the paint surface in the material tray mechanism; in the coating working state, the material tray mechanism is in the feeding position, and the bottom of the first lifting roller and the second lifting roller are immersed in the paint in the material tray mechanism.

[0020] Preferably, the tray mechanism includes a connecting support with a guide wheel and a tray, a hydraulic motor and a lift arranged on the connecting support. The tray mechanism is installed on the frame through the connecting support, and the lift is connected between the hydraulic motor and the tray.

[0021] The characteristics and advantages of the present invention are: the roller coater provided by the present invention has two sets of front roller coating devices which are respectively in the color changing standby state and the coating working state in the coating state of the roller coater, so that the roller coater has the function of changing colors without stopping, thereby improving the construction efficiency of roller coating of continuous strip materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the main structure of the roller coating machine provided in an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the top view of the roller coating machine provided in an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the front coating head in the roller coating machine provided in an embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a scraper assembly in a roller coater provided in an embodiment of the present invention;

[0027] Figure 5 It is a schematic structural diagram of a material tray mechanism in a roller coater provided in an embodiment of the present invention.

[0028] Description of Figure Numbers:

[0029] 1. Front roller coating device; 11. Support back roller; 12. Front coating mechanism; 121. First guide rail; 122. Front coating head; 1221. First coating roller; 1222. First material lifting roller; 1223. First metering roller; 1224. First rotating drive member; 1225. First moving drive member; 1226. Measuring roller pressure sensor; 1227. First linear guide rail; 1228. First metering roller support; 1229. Guide rail seat; 123. First drive member; 124. Ball cage coupling;

[0030] 2. Scraper assembly; 21. Worm reducer; 22. Scraper pressure plate; 23. Scraper blade; 24. Traction roller;

[0031] 3. Back roller coating device; 31. Back coating mechanism; 311. Back coating head; 3111. Second coating roller; 3112. Second lifting roller; 3113. Second rotating driving member; 3114. Second moving driving member; 312. Second driving member; 32. Lifting mechanism; 321. Lifting roller; 322. Avoiding hydraulic cylinder; 323. Turbine worm lifting assembly; 324. Guide assembly;

[0032] 4. The first rack;

[0033] 5. Second rack;

[0034] 6. Steering roller;

[0035] 7. Material tray mechanism; 71. Connecting support; 72. Material tray; 73. Hydraulic motor; 74. Lifter. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figures 1 to 5 As shown, the present invention provides a roller coating machine, which is used for coating continuous strip materials. The roller coating machine comprises a frame, a steering device and two sets of front roller coating devices 1 arranged on the frame. The steering device is used to turn the material to be coated. The two sets of front roller coating devices 1 are arranged in sequence along the moving direction of the material to be coated. The front roller coating device 1 comprises a supporting back roller 11 and a front coating mechanism 12. The front roller coating device 1 has a coating working state and a color-changing standby state. In the coating working state, the front coating mechanism 12 is close to the supporting back roller 11 and contacts the material to be coated. In the color-changing standby state, the front coating mechanism 12 is away from the supporting back roller 11 and is separated from the material to be coated. The roller coating machine has a standby state and a coating state. In the standby state, the two sets of front roller coating devices 1 are both in a color-changing standby state. In the coating state, one of the two sets of front roller coating devices 1 is in a color-changing standby state, and the other of the two sets of front roller coating devices 1 is in a coating working state. The present invention provides two sets of front roller coating devices 1 which are respectively in the color changing standby state and the coating working state in the coating state of the roller coating machine, so that the roller coating machine has the function of non-stop color changing, thereby improving the roller coating construction efficiency of continuous strip materials.

[0038] Specifically, Figure 1 As shown, the execution ends of the front coating mechanisms 12 in the two sets of front roller coating devices 1 are arranged close to each other, so as to achieve a more compact layout structure while realizing color change without stopping the machine.

[0039] According to a preferred embodiment of the present invention, the two sets of front roller coating devices 1 are completely staggered in the direction of gravity. Figure 1 and Figure 2 As shown, the two sets of front roller coating devices 1 are arranged at intervals in the horizontal direction and completely staggered in the gravity direction to avoid interference, thereby facilitating non-stop color change. Further, in order to obtain a more compact layout structure, the two sets of front roller coating devices 1 are partially overlapped in the horizontal direction.

[0040] According to a preferred embodiment of the present invention, Figure 4 As shown, a scraper assembly 2 is arranged on the frame to match the supporting back roller 11. The scraper assembly 2 includes a worm gear reducer 21, a scraper pressure plate 22, a scraper blade 23 and a traction roller 24. The worm gear reducer 21, the scraper pressure plate 22 and the scraper blade 23 form a whole and are arranged on the traction roller 24. The scraper assembly 2 is detachably connected to the frame. Specifically, as Figure 1 As shown, the roller coating machine is provided with two sets of front roller coating devices 1, so there are also two sets of scraper assemblies 2, and the scraper assemblies 2 cooperate with the supporting back roller 11 to obtain a better roller coating effect for the material to be roller coated. Among them, the scraper assembly 2 is detachably connected to the frame through fixing bolts. When the scraper blade 23 needs to be replaced, the front roller coating device 1 where the supporting back roller 11 that cooperates with the scraper assembly 2 of the scraper blade 23 to be replaced is located is first switched to the color-changing standby state, and the other front roller coating device 1 is switched to the coating working state. Subsequently, the fixing bolts between the scraper assembly 2 of the scraper blade 23 to be replaced and the frame are released, and the scraper assembly 2 is moved out of the roller coating machine area through the traction roller 24. After the scraper blade 23 is replaced, the scraper assembly 2 is returned to its original position. In this way, the scraper blade 23 can be replaced online without stopping the machine, which improves the utilization rate of the roller coating machine and avoids the disadvantage that the traditional roller coating machine can only be stopped to replace the scraper blade 23.

[0041] According to a preferred embodiment of the present invention, Figure 1 As shown, the front coating mechanism 12 includes a first guide rail 121, a front coating head 122 and a first driving member 123. The first guide rail 121 is arranged on the frame, the front coating head 122 is slidably connected to the first guide rail 121, and the first driving member 123 is used to drive the front coating head 122 to move along the first guide rail 121, so that the front coating head 122 is close to or away from the supporting back roller 11. Preferably, the first driving member 123 is a fast-opening hydraulic cylinder to facilitate the rapid switching of the states of the two sets of front roller coating devices 1 when changing colors and / or replacing scrapers.

[0042] According to a preferred embodiment of the present invention, Figures 1 to 3As shown, the front coating head 122 includes a first coating roller 1221, a first material raising roller 1222, a first metering roller 1223, a first rotating driving member 1224 and a first moving driving member 1225. The first coating roller 1221, the first material raising roller 1222 and the first metering roller 1223 are arranged in contact with each other in sequence. The first coating roller 1221, the first material raising roller 1222 and the first metering roller 1223 are connected with the first rotating driving member 1224 and the first moving driving member 1225 respectively. The first rotating driving member 1224 is used to drive the roller connected thereto to rotate, and the first moving driving member 1225 is used to drive the roller connected thereto to move so as to adjust the pressure between the rollers. In the coating working state, the first coating roller 1221 is in contact with the material to be coated. By setting the front coating head 122 to a three-roller type having the first coating roller 1221, the first material raising roller 1222 and the first metering roller 1223, the thickness and uniformity of the coating on the surface of the continuous strip can be improved, and the coating effect can be ensured.

[0043] Preferably, the first rotating drive member 1224 is a reduction motor with an incremental encoder, which realizes precise control of the rotation speed of the corresponding roller through the incremental encoder. A ball cage coupling 124 is connected between the reduction motor and the corresponding roller. A quick-opening mechanism is provided at one end of the ball cage coupling 124 connected to the corresponding roller to facilitate replacement of the corresponding roller and save roller replacement time.

[0044] According to a preferred embodiment of the present invention, Figure 3 As shown, the front coating head 122 also includes a metering roller pressure sensor 1226, a material lifting roller pressure sensor and a coating roller pressure sensor electrically connected to the first mobile driving member 1225 on the corresponding roller, the metering roller pressure sensor 1226 is used to measure the pressure between the first metering roller 1223 and the first material lifting roller 1222, the material lifting roller pressure sensor is used to measure the pressure between the first material lifting roller 1222 and the first coating roller 1221, and the coating roller pressure sensor is used to measure the pressure between the first coating roller 1221 and the material to be coated. When each pressure sensor detects that the pressure value is inconsistent with its corresponding preset value, the first mobile driving member 1225 electrically connected to each pressure sensor starts to move so that the pressure value of each pressure sensor tends to change toward its corresponding target preset value. Preferably, the first mobile driving member 1225 is a servo motor to facilitate closed-loop control of the pressure between the rollers. Further, the servo motor is preferably a servo motor with a 90-degree shaft output mode, so that on the basis of satisfying the function of automatically adjusting the pressure between the rollers, the pressure can be manually adjusted when the servo motor fails to ensure continuous production.

[0045] Specifically, Figure 3As shown, the front coating head 122 also includes a first linear guide 1227, a second linear guide and a third linear guide, the first linear guide 1227 is slidably connected with a first metering roller support 1228 for installing a first metering roller 1223, the second linear guide is slidably connected with a first feeding roller 1222 sub-support for installing a first feeding roller 1222, the third linear guide is slidably connected with a first coating roller 1221 sub-support for installing a first coating roller 1221, the first linear guide 1227 is fixedly connected to the first feeding roller 1222 sub-support, the second linear guide is fixedly connected to the first coating roller 1221 sub-support, the third linear guide is slidably connected to the first guide rail 121 through a guide rail seat 1229, and the guide rail seat 1229 is transmission-connected with the first driving member 123. Preferably, in order to save layout space, the first metering roller support 1228, the first material lifting roller 1222 sub-support and the guide rail support 1229 are all connected to the corresponding servo motors through the ball screw assembly. In this way, the front coating head 122 and the material to be coated can be quickly approached or separated by the first driving member 123, and under the drive of the corresponding servo motor, the roller pressure between the first metering roller 1223 and the first material lifting roller 1222 is adjusted by the movement of the first metering roller support 1228 relative to the first linear guide 1227, the roller pressure between the first material lifting roller 1222 and the first coating roller 1221 is adjusted by the movement of the first material lifting roller 1222 sub-support relative to the second linear guide, and the pressure between the first coating roller 1221 and the material to be coated is adjusted by the movement of the first coating roller 1221 sub-support relative to the third linear guide.

[0046] Among them, Figure 3As shown, the first metering roller support 1228 is connected to a metering roller pressure sensor 1226 , the first lifting roller 1222 support is connected to a lifting roller pressure sensor, and the guide rail support 1229 is connected to a coating roller pressure sensor. Exemplarily, the roller pressure adjustment process between the first metering roller 1223 and the first feeding roller 1222 is as follows: first, the servo motor connected to the first metering roller 1223 rotates, driving the screw of the ball screw assembly to rotate, so that the sleeve of the ball screw assembly moves in the direction close to the first feeding roller 1222, and then drives the first metering roller 1223 to move and press against the first feeding roller 1222; as the servo motor continues to rotate in the same direction, the first metering roller 1223 is further pressed on the first feeding roller 1222, and the pressing force is fed back to the metering roller pressure sensor 1226, and the metering roller pressure sensor 1226 compares the measured actual pressure value with its target preset value; if the actual pressure value is smaller than its target preset value, the servo motor continues to rotate in the same direction until the actual pressure value is consistent with its target preset value, the servo motor stops rotating, and the pressure adjustment is completed; conversely, if the actual pressure value is larger than its target preset value, the servo motor rotates in the opposite direction until the actual pressure value is consistent with its target preset value, the servo motor stops rotating, and the pressure adjustment is completed.

[0047] According to a preferred embodiment of the present invention, the roller coating machine further comprises a back roller coating device 3 arranged on the frame, and the back roller coating device 3 comprises a back coating mechanism 31 and a lifting mechanism 32, and the lifting mechanism 32 is used to support the material to be coated at the back coating mechanism 31. In the standby state, the lifting mechanism 32 is in a high position, and the back coating mechanism 31 is separated from the material to be coated; in the coating state, the lifting mechanism 32 is in a low position, and the back coating mechanism 31 is in contact with the material to be coated. Specifically, as Figure 1 As shown, the roller coating machine includes a first frame 4 and a second frame 5 which are arranged in a horizontal direction at intervals, two sets of front roller coating devices 1 and a scraper assembly 2 are arranged on the first frame 4, and a back roller coating device 3 is arranged on the second frame 5. Among them, the steering device includes two steering rollers 6 which are arranged in a gravity direction and are arranged in an interval on the second frame 5, and a steering roller 6 which is arranged between the two sets of front roller coating devices 1 in the horizontal direction. In this way, the back roller coating device 3 and the front roller coating device 1 of the split design are connected by the steering device to form a complete roller coating machine, which is convenient for construction and has the advantages of compact equipment, light weight, small footprint, low investment, and centralized control.

[0048] According to a preferred embodiment of the present invention, Figure 1As shown, the lifting mechanism 32 includes a lifting roller 321, a hydraulic cylinder 322, a worm gear lifting assembly 323 and a guide assembly 324. The hydraulic cylinder 322 is connected between the output end of the worm gear lifting assembly 323 and the lifting roller 321. The guide assembly 324 has a meshing gear and a rack, and the rack is fixedly connected to the frame. The lifting roller 321 is coaxially connected with the gear, and the material to be rolled is carried on the lifting roller 321. In this way, under the guiding action of the guide assembly 324, the position of the lifting roller 321 is finely adjusted in a slight amount in the production process in cooperation with the worm gear lifting assembly 323, so as to improve the coating defects caused by different plate thicknesses and improve the yield rate.

[0049] According to a preferred embodiment of the present invention, Figure 1 As shown, the back coating mechanism 31 includes a connected back coating head 311 and a second driving member 312, and the second driving member 312 is used to drive the back coating head 311 to move along the gravity direction so that the back coating head 311 is close to or away from the material to be rolled. Preferably, the second driving member 312 is a quick-opening hydraulic cylinder to facilitate the back coating device 3 to quickly enter or withdraw from the switch. Preferably, the second driving member 312 is a quick-opening hydraulic cylinder so that the back coating head 311 can quickly approach or move away from the material to be rolled.

[0050] According to a preferred embodiment of the present invention, Figures 1 to 3 As shown, the back coating head 311 includes a second coating roller 3111, a second feeding roller 3112, a second rotating drive member 3113 and a second movable drive member 3114. The second coating roller 3111 and the second feeding roller 3112 are arranged in contact with each other. The second coating roller 3111 and the second feeding roller 3112 are respectively connected with a second rotating drive member 3113. The second feeding roller 3112 is also connected with a second movable drive member 3114. The second rotating drive member 3113 is used to drive the roller connected thereto to rotate, and the second movable drive member 3114 is used to drive the second feeding roller 3112 to move so as to adjust the inter-roller pressure between the second feeding roller 3112 and the second coating roller 3111. In the coating state, the second coating roller 3111 is in contact with the material to be coated. Specifically, the back coating head 311 also includes a linear guide rail, on which a second material raising roller 3112 sub-support for mounting the second material raising roller 3112 is slidably connected, the linear guide rail and the second coating roller 3111 are transmission-connected to the second driving member 312 through a connecting seat, and the second material raising roller 3112 sub-support is transmission-connected to the second moving driving member 3114 through a ball screw assembly. In this way, the front coating head 122 and the material to be coated are quickly approached or separated by the second driving member 312, and under the drive of the second moving driving member 3114, the pressure between the second material raising roller 3112 and the second coating roller 3111 is adjusted by the movement of the second material raising roller 3112 sub-support relative to the linear guide rail.

[0051] Preferably, the second rotating drive member 3113 is a reduction motor with an incremental encoder, which realizes precise control of the rotation speed of the corresponding roller through the incremental encoder. A ball cage coupling 124 is connected between the reduction motor and the corresponding roller. A quick-opening mechanism is provided at one end of the ball cage coupling 124 connected to the corresponding roller to facilitate replacement of the corresponding roller and save roller replacement time.

[0052] Preferably, the back coating head 311 also includes a roller pressure sensor electrically connected to the second movable driving member 3114 on the second material raising roller 3112, which is used to measure the pressure between the second material raising roller 3112 and the second coating roller 3111. When the roller pressure sensor detects that the pressure value is inconsistent with its corresponding preset value, the second movable driving member 3114 electrically connected to the roller pressure sensor starts to move so that the pressure value of the roller pressure sensor tends to change toward its corresponding target preset value. Preferably, the second movable driving member 3114 is a servo motor to facilitate closed-loop control of the roller pressure.

[0053] According to a preferred embodiment of the present invention, the roller coating machine further comprises a material tray mechanism 7, and the material tray mechanism 7 is arranged below the first material raising roller 1222 and the second material raising roller 3112. In the color-changing standby state, the material tray mechanism 7 is in the standby position, and the first material raising roller 1222 and the second material raising roller 3112 have a preset distance from the coating surface in the material tray mechanism 7; in the coating working state, the material tray mechanism 7 is in the feeding position, and the bottoms of the first material raising roller 1222 and the second material raising roller 3112 are immersed in the coating in the material tray mechanism 7. The standby position state and the feeding position state of the material tray 72 are respectively associated and controlled with the color-changing standby state and the coating working state of the front roller coating device 1, so as to realize non-stop color changing. Among them, in the feeding position state of the material tray mechanism 7, the depth of the bottom of the first material raising roller 1222 and the second material raising roller 3112 immersed in the coating can be adaptively adjusted according to actual conditions, and this application does not limit this.

[0054] According to a preferred embodiment of the present invention, Figure 5 As shown, the tray mechanism 7 includes a connecting support 71 with a guide wheel, a tray 72 arranged on the connecting support 71, a hydraulic motor 73, and an elevator 74. The tray mechanism 7 is installed on the frame through the connecting support 71, and the elevator 74 is connected between the hydraulic motor 73 and the tray 72. The height of the tray 72 is adjusted by the cooperation of the hydraulic motor 73 and the elevator 74, so as to realize automatic centralized control, simple operation and high safety.

[0055] Based on the above description, the roller coating machine provided by the embodiment of the present invention has the following beneficial effects:

[0056] The roller coater provided by the embodiment of the present invention has two sets of front roller coating devices 1 which are respectively in the color-changing standby state and the coating working state in the coating state of the roller coater, so that the roller coater has the function of changing colors without stopping, thereby improving the efficiency of roller coating of continuous strip materials; by arranging a scraper assembly 2 with a roller that cooperates with the supporting back roller 11 of each front roller coating device 1, it is possible to replace the scraper blade 23 online without stopping, thereby improving the utilization rate of the roller coater and avoiding the disadvantage that the traditional roller coater can only stop to replace the scraper blade 23; through the cooperation of the servo motor and the corresponding pressure sensor, automatic closed-loop control of the pressure between the rollers is realized; the back roller coating device 3 and the front roller coating device 1 are respectively arranged on the first frame 4 and the second frame 5, and the split-designed back roller coating device 3 and the front roller coating device 1 are connected through a steering device to form a complete roller coater for easy construction, which has the advantages of compact equipment, light weight, small footprint, low investment and centralized control.

[0057] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A roller coating machine, characterized in that: The roller coating machine is used for coating continuous strip materials, and comprises a frame, a steering device and two sets of front roller coating devices arranged on the frame, wherein the steering device is used to turn the material to be coated, and the two sets of front roller coating devices are arranged in sequence along the moving direction of the material to be coated; The front roller coating device comprises a supporting back roller and a front coating mechanism, and the front roller coating device has a coating working state and a color-changing standby state. In the coating working state, the front coating mechanism is close to the supporting back roller and in contact with the material to be coated; in the color-changing standby state, the front coating mechanism is away from the supporting back roller and separated from the material to be coated; The roller coating machine has a standby state and a coating state. In the standby state, the two sets of the front roller coating devices are in a color-changing standby state. In the coating state, one of the two sets of the front roller coating devices is in a color-changing standby state, and the other of the two sets of the front roller coating devices is in a coating working state.

2. The roller coating machine according to claim 1, characterized in that: The two sets of front roller coating devices are completely staggered in the direction of gravity.

3. The roller coating machine according to claim 1, characterized in that: The frame is provided with a scraper assembly matched with the supporting back roller, and the scraper assembly includes a worm gear reducer, a scraper pressure plate, a scraper blade and a traction roller. The worm gear reducer, the scraper pressure plate and the scraper blade form a whole and are arranged on the traction roller. The scraper assembly is detachably connected to the frame.

4. The roller coating machine according to claim 1, characterized in that: The front coating mechanism includes a first guide rail, a front coating head and a first driving member, wherein the first guide rail is arranged on the frame, the front coating head is slidably connected to the first guide rail, and the first driving member is used to drive the front coating head to move along the first guide rail so that the front coating head approaches or moves away from the supporting back roller.

5. The roller coating machine according to claim 4, characterized in that: The front coating head includes a first coating roller, a first feeding roller, a first metering roller, a first rotating driving member and a first moving driving member. The first coating roller, the first feeding roller and the first metering roller are arranged in contact with each other in sequence. The first coating roller, the first feeding roller and the first metering roller are correspondingly connected with the first rotating driving member and the first moving driving member. The first rotating driving member is used to drive the roller connected thereto to rotate, and the first moving driving member is used to drive the roller connected thereto to move so as to adjust the pressure between the rollers. In the coating working state, the first coating roller is in contact with the material to be coated.

6. The roller coating machine according to claim 5, characterized in that: The front coating head also includes a metering roller pressure sensor, a feeding roller pressure sensor and a coating roller pressure sensor which are electrically connected to the first movable driving member on the corresponding roller. The metering roller pressure sensor is used to measure the pressure between the first metering roller and the first feeding roller, the feeding roller pressure sensor is used to measure the pressure between the first feeding roller and the first coating roller, and the coating roller pressure sensor is used to measure the pressure between the first coating roller and the material to be coated. When each pressure sensor detects that the pressure value is inconsistent with its corresponding preset value, the first movable driving member electrically connected to each pressure sensor starts to move so that the pressure value of each pressure sensor tends to change toward its corresponding target preset value.

7. The roller coating machine according to claim 5, characterized in that: The roller coating machine also includes a back roller coating device arranged on the frame, the back roller coating device includes a back coating mechanism and a lifting mechanism, the lifting mechanism is used to support the material to be roller coated at the back coating mechanism, in the standby state, the lifting mechanism is in a high position, and the back coating mechanism is separated from the material to be roller coated; In the coating state, the lifting mechanism is in a low position, and the back coating mechanism is in contact with the material to be roller coated.

8. The roller coating machine according to claim 7, characterized in that: The back coating mechanism comprises a back coating head and a second driving member connected to each other, wherein the second driving member is used to drive the back coating head to move along the direction of gravity so as to make the back coating head approach or move away from the material to be roller coated.

9. The roller coating machine according to claim 8, characterized in that: The back coating head includes a second coating roller, a second feeding roller, a second rotating drive member and a second movable drive member. The second coating roller and the second feeding roller are arranged in contact with each other. The second coating roller and the second feeding roller are respectively connected to the second rotating drive member. The second feeding roller is also connected to the second movable drive member. The second rotating drive member is used to drive the roller connected to it to rotate, and the second movable drive member is used to drive the second feeding roller to move so as to adjust the inter-roller pressure between the second feeding roller and the second coating roller. In the coating state, the second coating roller is in contact with the material to be coated.

10. The roller coating machine according to claim 9, characterized in that: The roller coater also includes a material tray mechanism, which is arranged below the first material lifting roller and the second material lifting roller. In the color-changing standby state, the material tray mechanism is in a standby position, and the first material lifting roller and the second material lifting roller have a preset distance from the paint surface in the material tray mechanism; in the coating working state, the material tray mechanism is in a feeding position, and the bottoms of the first material lifting roller and the second material lifting roller are immersed in the paint in the material tray mechanism.

11. The roller coating machine according to claim 10, characterized in that: The tray mechanism includes a connecting support with a guide wheel and a tray, a hydraulic motor and a lift arranged on the connecting support. The tray mechanism is installed on the frame through the connecting support, and the lift is connected between the hydraulic motor and the tray.

12. The roller coating machine according to claim 7, characterized in that: The lifting mechanism includes a lifting roller, an avoidance hydraulic cylinder, a worm gear lifting assembly and a guide assembly. The avoidance hydraulic cylinder is connected between the output end of the worm gear lifting assembly and the lifting roller. The guide assembly has a meshing gear and a rack. The rack is fixedly connected to the frame. The lifting roller is coaxially connected to the gear, and the material to be rolled is carried on the lifting roller.

Images