A fixed roller coater roll changing protection device and a roller coater

Abstract

The utility model provides a kind of fixed roll coater roll replacement protection device and roll coater, including the roller, winding curtain, limiting mechanism and drive mechanism being installed on roll coater frame body;Roll coater frame body is provided with over steel groove along height direction, roll coater frame body is also provided with coating mechanism, and the coating roller on coating mechanism is arranged towards over steel groove;Roller is rotatably installed between over steel groove and roll coater frame body;Winding curtain is wound and arranged on roller;Drive mechanism is installed on roll coater frame body, and the output end of drive mechanism is coaxially fixedly connected with roller;The first end of limiting mechanism is connected with winding curtain, the second end of limiting mechanism is installed on roll coater frame body, and limiting mechanism is electrically connected with drive mechanism.The utility model is protected to the strip steel to be processed in the maintenance process by winding curtain, to prevent the passivation liquid or oil stain splashed during coating mechanism maintenance to cause the strip steel to be processed pollution and appear quality problem.

Description

Technical Field

[0001] This utility model relates to the technical field of protective accessories for roller coating machines, specifically to a fixed roller coating machine roller changing protection device and a roller coating machine. Background Technology

[0002] The roller coating machine consists of two coating heads located at the inlet and outlet sides of the strip, respectively. Each coating head comprises a coating roller and a feeding roller. Each coating head is equipped with a stainless steel feeding tray containing a passivation solution at a specific level. The feeding roller, a chrome-plated stainless steel roller, rotates to transfer the passivation solution to the coating roller, which is a rubber roller. The upper and lower coating rollers form a specific wrap angle with the strip, and the coating roller then evenly coats the passivation solution onto the strip surface. Both the feeding roller and the coating roller are driven by servo motors for lifting and lowering. Four servo motors are each equipped with a rotary encoder to precisely record and control the positions of the coating roller and the feeding roller.

[0003] Because the coating rollers are rubber rollers constantly immersed in acidic passivation solution and in long-term frictional contact with the strip steel, especially when the strip steel widens, frequent replacement of the coating rollers and cleaning of impurities at the bottom of the feeding tray are necessary. Since the coating rollers and feeding tray of a fixed roller coater are relatively close to the strip steel, the running strip steel can easily come into contact with the suspended coating rollers during frequent roller replacements and tray cleaning. Operators are also prone to contact with the strip steel while cleaning the tray and coating rollers, causing serious injury. Furthermore, passivation solution can easily splash directly onto the strip steel surface when operators clean the tray, resulting in strip steel quality defects.

[0004] In summary, there is an urgent need for a fixed roller coating machine roller changing protection device to solve or at least partially solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a fixed roller coating machine roller changing protection device, which aims to solve the problem that passivation liquid easily splashes onto the strip steel during the cleaning of the coating roller, resulting in defective strip steel. The specific technical solution is as follows:

[0006] A fixed roller coating machine roller changing protection device includes a roller, a winding curtain, a limiting mechanism, and a driving mechanism installed on the roller coating machine frame. A steel trough is provided along the height direction on the roller coating machine frame, and a coating mechanism is also provided on the frame, with the coating roller on the coating mechanism arranged facing the steel trough. The roller is rotatably connected to the roller coating machine frame and is installed between the steel trough and the roller coating machine frame. The winding curtain is wound around the roller and includes a fixed end fixedly connected to the roller and a free end extending outwards. The driving mechanism is installed on the roller coating machine frame, and the output end of the driving mechanism is coaxially fixedly connected to the roller. The first end of the limiting mechanism is connected to the winding curtain, the second end of the limiting mechanism is installed on the roller coating machine frame, and the limiting mechanism is electrically connected to the driving mechanism.

[0007] Furthermore, the limiting mechanism includes a first limiting member, a second limiting member, and a limiting sensor. Both the first and second limiting members are mounted on the roller shutter. The first limiting member is fixedly connected to one end of the roller shutter near the fixed end. The second limiting member is fixedly connected to one end of the roller shutter near the free end. The limiting sensor is mounted on the frame of the roller coating machine. The detection end of the limiting sensor faces the roller shutter and is arranged close to the roller shutter. The limiting sensor is arranged on the moving path of the first and second limiting members.

[0008] Furthermore, both the first and second limiting members are made of metal, while the roller curtain is made of non-metallic flexible material; the limiting sensor is a metal proximity sensor, which is installed on the roller coating machine frame, and the receiving end of the metal proximity sensor is arranged facing the extending end of the roller curtain.

[0009] Furthermore, the drive mechanism includes a motor, which is mounted on the frame of the roller coating machine, and the output shaft of the motor is coaxially and fixedly connected to the roller.

[0010] Furthermore, it also includes a scraping mechanism, which is installed on the roller coating machine frame and includes a scraper and a stop member. The stop member is installed on the roller coating machine frame, the scraper is hinged to the roller coating machine frame, and the roller curtain is clamped between the scraper and the stop member; the scraper is arranged on the side close to the coating mechanism.

[0011] Furthermore, the scraper is arranged at a downward angle and abuts against the side wall of the roller shutter.

[0012] Furthermore, the scraping mechanism also includes an elastic element, the first end of which is connected to the roller coating machine frame, and the second end of which is connected to the scraper.

[0013] On the other hand, this utility model also provides a roller coating machine, including a roller coating machine frame and a coating mechanism. The roller coating machine frame is provided with a steel passage groove along the height direction. Two coating mechanisms are provided, which are installed opposite to each other on the roller coating machine frame and are respectively arranged on both sides of the steel passage groove. It also includes the aforementioned fixed roller coating machine roller changing protection device. Two fixed roller coating machine roller changing protection devices are provided, which are distributed at intervals on both sides of the steel passage groove and are located between the two oppositely arranged coating mechanisms.

[0014] Furthermore, the coating mechanism includes a horizontal moving table, a pick-up roller, a coating roller, and a feeding tray. The horizontal moving table is slidably connected to the frame of the roller coating machine in the direction of approaching and moving away from the steel trough. The pick-up roller and the coating roller are both rotatably connected to the horizontal moving table, and the roller surface of the pick-up roller is in contact with the roller surface of the coating roller. The feeding tray is installed on the horizontal moving table, and the pick-up roller extends into the feeding tray. The coating roller is arranged on the side of the horizontal moving table close to the steel trough, and the coating roller extends out of the horizontal moving table.

[0015] Furthermore, the two coating mechanisms are staggered along the height direction.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] When maintenance is required on the coating mechanism, the drive mechanism drives the rollers to rotate forward, unwinding the roll-up curtain. This curtain then acts as a barrier between the coating mechanism and the strip steel in the trough. During maintenance, any passivating liquid or oil splashed from the coating mechanism is blocked by the roll-up curtain, preventing it from splashing onto the strip steel and causing quality defects. In other words, the roll-up curtain provides protection for the strip steel. After maintenance, the drive mechanism drives the rollers to rotate in the opposite direction, rewinding the roll-up curtain. This moves the curtain away from the working stroke range of the coating mechanism, allowing it to smoothly contact the strip steel and perform the coating process. The roll-up curtain prevents it from interfering with the normal operation of the coating mechanism. In short, it does not interfere with the normal operation of the coating mechanism during normal operation, and the unwinding of the roll-up curtain during maintenance protects the strip steel, reducing quality problems caused by splashing passivating liquid or oil during maintenance.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be described below with reference to... Figures 1-6 The present invention will be described in further detail below. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is one of the overall structural schematic diagrams of a fixed roller coating machine roller changing protection device according to this utility model;

[0021] Figure 2 This is the second schematic diagram of the overall structure of a fixed roller coating machine roller changing protection device according to this utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a cross-sectional view of a fixed roller coating machine roller changing protection device according to this utility model;

[0024] Figure 5 yes Figure 4 Enlarged view at point B;

[0025] Figure 6 This is a schematic diagram of the overall structure of a roller coating machine after removing part of the roller coating machine frame according to this utility model.

[0026] The components include: 1. Roller; 2. Roller curtain; 3. Limiting mechanism; 31. First limiting component; 32. Second limiting component; 33. Limiting sensor; 4. Drive mechanism; 5. Scraping mechanism; 51. Scraper; 52. Abutment component; 53. Elastic component; 6. Roller coating machine frame; 61. Steel trough; 7. Coating mechanism; 71. Horizontal moving table; 72. Pick-up roller; 73. Coating roller; 74. Feeding tray. Detailed Implementation

[0027] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] Example 1:

[0030] See Figures 1-5This embodiment provides a fixed roller coating machine roller changing protection device, including a roller 1, a winding curtain 2, a limiting mechanism 3, and a driving mechanism 4 installed on the roller coating machine frame 6. A steel passage 61 is provided along the height direction on the roller coating machine frame 6. During use, the strip steel passes through the steel passage 61 from top to bottom. A coating mechanism 7 is also provided on the roller coating machine frame 6. The coating roller 73 on the coating mechanism 7 is arranged facing the steel passage 61. The coating mechanism 7 coats the strip steel, causing a passivation liquid to adhere to the surface of the strip steel, thereby protecting it. The roller 1 is rotatably connected to the roller coating machine frame 6 and is installed between the steel passage 61 and the roller coating machine frame 6. The winding curtain 2 is wound around the roller 1. 2 includes a fixed end fixedly connected to the roller 1 and a free end extending outward. When the roller 1 rotates, it drives the winding curtain 2 to wind up or unwind. After unwinding, the winding curtain 2 blocks the coating mechanism 7 between itself and the strip steel passing through the steel hole. After winding up, the winding curtain 2 is wound onto the roller 1, allowing the coating mechanism 7 to smoothly perform coating operations on the strip steel. The drive mechanism 4 is installed on the roller coating machine frame 6, and the output end of the drive mechanism 4 is coaxially and fixedly connected to the roller 1. The drive mechanism 4 drives the roller 1 to rotate, thereby realizing the winding and unwinding of the winding curtain 2. The first end of the limiting mechanism 3 is connected to the winding curtain 2, and the second end of the limiting mechanism 3 is installed on the roller coating machine frame 6. The limiting mechanism 3 is electrically connected to the drive mechanism 4. The limiting mechanism 3 limits the winding curtain 2, so that when the roller 1 rotates, the winding and unwinding of the winding curtain 2 can stop at a set position.

[0031] As can be seen from the above structural design, when the coating mechanism 7 needs to be repaired, the drive mechanism 4 drives the roller 1 to rotate in the forward direction to unwind the winding curtain 2, so that the winding curtain 2 blocks between the coating mechanism 7 and the strip steel in the steel passage 61. During the repair of the coating mechanism 7, the passivation liquid or oil splashed out by the coating mechanism 7 is blocked by the winding curtain 2, thereby preventing the passivation liquid or oil from splashing onto the strip steel to be processed, which would lead to the problem of strip steel quality defects. That is, the winding curtain 2 plays a protective role for the strip steel. After the coating mechanism 7 is repaired, the drive mechanism 4 drives the roller 1 to rotate in the reverse direction to wind up the winding curtain 2, so that the winding curtain 2 avoids the working stroke range of the coating mechanism 7, so that the coating mechanism 7 can smoothly contact the strip steel and perform coating work on the strip steel, preventing the winding curtain 2 from hindering the normal operation of the coating mechanism 7. It should be noted that when the drive mechanism 4 is driving the roller 1 to wind and unwind, the limiting mechanism 3 detects the position of the winding curtain 2 and controls the drive mechanism 4 to stop working in time to prevent the roller 1 from unwinding or winding the winding curtain 2 too much.

[0032] It should be noted that the roller blind 2 is made of flexible material, which can be woven from nylon or plastic film.

[0033] Furthermore, the limiting mechanism 3 includes a first limiting member, a second limiting member, and a limiting sensor 33. Both the first and second limiting members are mounted on the roller shutter 2. The first limiting member is fixedly connected to the end of the roller shutter 2 near the fixed end; the second limiting member is fixedly connected to the end of the roller shutter 2 near the free end. The limiting sensor 33 is mounted on the roller coating machine frame 6, with its detection end facing and close to the roller shutter 2, and positioned along the movement path of the first and second limiting members. Specifically, the first limiting member is a sensing block, which is bonded to the surface of the roller shutter 2; the second limiting member is a sensing strip, which is arranged along the length of the roller shutter 2 and bonded to it. The sensing strip is relatively heavy and tensions the roller shutter 2 under gravity.

[0034] It can be understood that, through the setting of the first limiting member, when the drive mechanism 4 controls the roller 1 to rotate and wind up the curtain 2, the first limiting member moves upward with the curtain 2. When the first limiting member moves to the limit sensor 33, the limit sensor 33 sends a stop signal. The drive mechanism 4 responds to the stop signal sent by the limit sensor 33 and stops working, thus completing the stopping of the winding of the curtain 2. Through the setting of the second limiting member, when the drive mechanism 4 controls the roller 1 to rotate and unwind the curtain 2, the second limiting member moves downward with the curtain 2. When the second limiting member moves to the limit sensor 33, the limit sensor 33 sends a stop signal. The drive mechanism 4 responds to the stop signal sent by the limit sensor 33 and stops working, thus completing the unwinding of the curtain 2.

[0035] Specifically, both the first and second limiting members are made of metal, while the roller shutter 2 is made of non-metallic flexible material. Both the first and second limiting members are fixedly connected to the surface of the roller shutter 2 by adhesive bonding. The limiting sensor 33 is a metal proximity sensor, which is mounted on the roller coating machine frame 6, with its receiving end facing the extending end of the roller shutter 2. When either the first or second limiting member approaches the metal proximity sensor, the sensor sends a stop signal, and the drive mechanism 4 responds to the stop signal and stops operating. This ensures timely stopping of unwinding and rewinding.

[0036] Furthermore, the drive mechanism 4 includes a motor, which is mounted on the roller coating machine frame 6. The output shaft of the motor is coaxially and fixedly connected to the roller 1. Specifically, the drive mechanism 4 also includes a switch and a power supply. The motor is connected to the power supply through the switch, which includes a take-up switch and an unwind switch. When the unwind switch is pressed, the motor is energized and drives the roller 1 to unwind the curtain 2 until the second limit member moves with the curtain 2 to the metal proximity sensor. The metal sensor senses the sensing block of the second limit member and sends a stop signal. The motor responds to the stop signal and stops working, thus stopping the unwinding. When the take-up switch is pressed, the motor is energized and drives the roller 1 to take up the curtain 2 until the first limit member moves with the curtain 2 to the metal proximity sensor. The metal sensor senses the sensing strip of the first limit member and sends a stop signal. The motor responds to the stop signal and stops working, thus stopping the take-up.

[0037] Furthermore, it also includes a scraping mechanism 5, which is mounted on the roller coating machine frame 6. The scraping mechanism 5 includes a scraper 51 and a stop member. The stop member is mounted on the roller coating machine frame 6, and the scraper 51 is hinged to the roller coating machine frame 6. The roller curtain 2 is held between the scraper 51 and the stop member. The scraper 51 is arranged on the side close to the coating mechanism 7. Specifically, the scraping mechanism 5 is arranged close to the roller 1. When the roller 1 winds up the roller curtain 2, the scraper 51 abuts against the surface of the roller curtain 2. As the roller curtain 2 continues to wind up, the scraper 51 scrapes off the passivation liquid and oil on the surface of the roller curtain 2, preventing the passivation liquid and oil from contaminating other parts of the roller curtain 2 during the winding process.

[0038] Furthermore, the scraper 51 is arranged at a downward angle, and the lower end of the scraper 51 abuts against the side wall of the roller shutter 2.

[0039] It is known that by arranging the scraper 51 at a downward angle, the roller curtain 2 can be smoothly unrolled when it is being unrolled, and friction will be generated between the roller curtain 2 and the scraper 51 when it is being rewound. The horizontal component of this friction causes the scraper 51 to press against the roller curtain 2, which is equivalent to providing a positive pressure to the scraper 51, so that the scraper 51 can effectively scrape off the passivation liquid and oil stains on the roller curtain 2.

[0040] Furthermore, the scraping mechanism 5 also includes an elastic element 53. The first end of the elastic element 53 is connected to the roller coating machine frame 6, and the second end of the elastic element 53 is connected to the scraper 51. Specifically, the elastic element 53 can be a torsion spring, which is sleeved on the hinge shaft between the hinged scraper 51 and the roller coating machine frame 6. The first end of the torsion spring abuts against the scraper 51, and the second end of the torsion spring abuts against the roller coating machine frame 6. The torsion spring applies a spring force to the scraper 51, keeping the lower end of the scraper 51 in contact with the roller curtain 2. Of course, the elastic element 53 can also be other structures or components that can keep the scraper 51 in contact with the roller curtain 2.

[0041] Example 2:

[0042] See Figure 6 This embodiment provides a roller coating machine, including a roller coating machine frame 6 and coating mechanisms 7. The roller coating machine frame 6 is provided with a steel passage 61 along the height direction. The steel passage 61 is used to process strip steel, allowing the strip steel to pass through from top to bottom. Two coating mechanisms 7 are provided, and the two coating mechanisms 7 are installed opposite to each other on the roller coating machine frame 6, and the two coating mechanisms 7 are respectively arranged on both sides of the steel passage 61. It also includes the fixed roller coating machine roller changing protection device of the above embodiment 1. Two roller coating machine roller changing protection devices are provided, and the two fixed roller coating machine roller changing protection devices are distributed at intervals on both sides of the steel passage 61, and both fixed roller coating machine roller changing protection devices are located between the two oppositely arranged coating mechanisms 7.

[0043] It is understood that the coating mechanism 7 coats the strip steel. When the coating mechanism 7 needs maintenance, the roll curtain 2 is lowered and unwound using the fixed roller coating machine's roll changing protection device. The roll curtain 2 is positioned between the strip steel and the coating mechanism 7, preventing passivation liquid or oil from splashing onto the strip steel and causing quality problems during maintenance. After the coating roller 73 is maintained, the roll curtain 2 is wound up using the drive mechanism 4 in the fixed roller coating machine's roll changing protection device. This method is convenient to use and store, and provides good protection.

[0044] Furthermore, the coating mechanism 7 includes a horizontal moving table 71, a pick-up roller 72, a coating roller 73, and a loading tray 74. The horizontal moving table 71 is slidably connected to the roller coating machine frame 6 in the direction of approaching and moving away from the steel trough 61. The pick-up roller 72 and the coating roller 73 are both rotatably connected to the horizontal moving table 71, and the roller surface of the pick-up roller 72 is in contact with the roller surface of the coating roller 73. The loading tray 74 is detachably mounted on the horizontal moving table 71, and the pick-up roller 72 extends into the loading tray 74. The coating roller 73 is arranged on the side of the horizontal moving table 71 near the steel trough 61, and the coating roller 73 extends out of the horizontal moving table 71.

[0045] The horizontal moving mechanism drives the feeding tube and the coating roller 73 to move simultaneously, so that the coating roller 73 moves closer to or further away from the strip steel to be coated. When the horizontal moving mechanism moves the coating roller 73 to contact the strip steel, and drives the coating roller 73 to rotate as the strip steel moves, the coating process of the strip steel is realized.

[0046] Furthermore, the two coating mechanisms 7 are staggered along the height direction.

[0047] It can be understood that by staggering the two coating mechanisms 7 along the height direction, during the coating process, when the coating rollers 73 of the two staggered coating mechanisms 7 come into contact with the strip, the steel plate will deform along the arc direction of the coating rollers 73, thereby increasing the contact area between the coating rollers 73 and the strip being coated. This increases the contact area between the coating rollers 73 and the strip, allowing the passivation liquid on the coating rollers 73 to be transferred to the strip as much as possible, thus improving the coating effect. The remaining aspects are basically the same as in Example 1 and will not be repeated here.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for changing rollers on a fixed roller coating machine, characterized in that: It includes a roller (1), a winding curtain (2), a limiting mechanism (3), and a driving mechanism (4) installed on the frame (6) of the roller coating machine; A steel trough (61) is provided on the frame (6) of the roller coating machine along the height direction. A coating mechanism (7) is also provided on the frame (6) of the roller coating machine. The coating roller (73) on the coating mechanism (7) is arranged facing the steel trough (61). The roller (1) is rotatably connected to the frame (6) of the roller coating machine, and the roller (1) is installed between the steel trough (61) and the frame (6) of the roller coating machine; The roller blind (2) is wound and arranged on the roller (1). The roller blind (2) includes a fixed end fixedly connected to the roller (1) and a free end extending outward. The drive mechanism (4) is mounted on the frame (6) of the roller coating machine, and the output end of the drive mechanism (4) is coaxially and fixedly connected to the roller (1); The first end of the limiting mechanism (3) is connected to the rolling curtain (2), the second end of the limiting mechanism (3) is installed on the roller coating machine frame (6), and the limiting mechanism (3) is electrically connected to the driving mechanism (4).

2. The fixed roller coating machine roller changing protection device according to claim 1, characterized in that: The limiting mechanism (3) includes a first limiting member (31), a second limiting member (32) and a limiting sensor (33), and the first limiting member (31) and the second limiting member (32) are both installed on the roller blind (2); The first limiting member (31) is fixedly connected to one end of the roller blind (2) near the fixed end; The second limiting member (32) is fixedly connected to one end of the roller blind (2) near the free end; The limit sensor (33) is used to be installed on the frame (6) of the roller coating machine. The detection end of the limit sensor (33) faces the roller curtain (2) and is arranged close to the roller curtain (2). The limit sensor (33) is arranged on the moving path of the first limit member (31) and the second limit member (32).

3. The fixed roller coating machine roller changing protection device according to claim 2, characterized in that: The first limiting member (31) and the second limiting member (32) are both made of metal materials, while the roller blind (2) is made of non-metallic flexible materials; The limiting sensor (33) is a metal proximity sensor, which is installed on the roller coating machine frame (6) and the receiving end of the metal proximity sensor is arranged facing the protruding end of the roller curtain (2).

4. The fixed roller coating machine roller changing protection device according to claim 1, characterized in that: The drive mechanism (4) includes a motor, which is mounted on the frame (6) of the roller coating machine, and the output shaft of the motor is coaxially and fixedly connected to the roller (1).

5. A fixed roller coating machine roller changing protection device according to any one of claims 1-4, characterized in that: It also includes a scraping mechanism (5), which is mounted on the roller coating machine frame (6). The scraping mechanism (5) includes a scraper (51) and abutment (52). The abutment (52) is mounted on the roller coating machine frame (6). The scraper (51) is hinged to the roller coating machine frame (6). The roller curtain (2) is held between the scraper (51) and the abutment (52). The scraper (51) is arranged on one side near the coating mechanism (7).

6. The fixed roller coating machine roller changing protection device according to claim 5, characterized in that: The scraper (51) is arranged at a downward angle and abuts against the side wall of the roller blind (2).

7. A fixed roller coating machine roller changing protection device according to claim 6, characterized in that: The scraping mechanism (5) also includes an elastic element (53), the first end of which is connected to the roller coating machine frame (6), and the second end of which is connected to the scraper (51).

8. A roller coating machine, characterized in that: The machine includes a roller coating machine frame (6) and a coating mechanism (7). The roller coating machine frame (6) has a steel passage (61) along the height direction. Two coating mechanisms (7) are provided. The two coating mechanisms (7) are installed opposite to each other on the roller coating machine frame (6), and the two coating mechanisms (7) are respectively arranged on both sides of the steel passage (61). It also includes the fixed roller coating machine roller changing protection device as described in any one of claims 1-7 above, wherein two roller coating machine roller changing protection devices are provided, and the two fixed roller coating machine roller changing protection devices are distributed at intervals on both sides of the steel trough (61), and both fixed roller coating machine roller changing protection devices are located between two oppositely arranged coating mechanisms (7).

9. A roller coating machine according to claim 8, characterized in that: The coating mechanism (7) includes a horizontal moving table (71), a material taking roller (72), a coating roller (73) and a feeding tray (74). The horizontal moving table (71) is slidably connected to the roller coating machine frame (6) in the direction of approaching and moving away from the steel trough (61). The material taking roller (72) and the coating roller (73) are both rotatably connected to the horizontal moving table (71), and the roller surface of the material taking roller (72) is in contact with the roller surface of the coating roller (73); The feeding tray (74) is mounted on the horizontal moving table (71), and the picking roller (72) extends into the feeding tray (74); The coating roller (73) is arranged on the side of the horizontal moving table (71) near the steel trough (61), and the coating roller (73) extends out of the horizontal moving table (71).

10. A roller coating machine according to claim 8 or 9, characterized in that: The two coating mechanisms (7) are staggered along the height direction.

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