Roller coater capable of reliably controlling pressure between rollers

Abstract

The utility model discloses a roller coater capable of reliably controlling the pressure between rollers, which comprises a rack, a material dipping roller is rotatably arranged on one side of the end part of the rack through a coating groove arranged at the end part of the rack in a penetrating manner, and a material scraping hopper plate is attached to one side of the material dipping roller, so that when the material dipping roller rolls and transmits the coating in the coating groove to a coating roller, the coating in the coating groove is scraped by the material scraping hopper plate. Due to the fact that the coating roller makes direct contact with the cloth, crushed material impurities can be attached to the surface of the cloth, and due to the fact that the coating roller makes contact with the material dipping roller, the attached crushed material impurities can be conveyed to the surface of the material dipping roller to be brought into paint in the paint groove. Therefore, plastic impurities and paint mixtures on the surface of the dipping roller are scraped and cleaned by utilizing the scraping hopper plate when the dipping roller rotates to transfer paint, and scraped and cleaned crushed impurities are collected in the receiving groove through the inclined scraping hopper plate and the discharging pipe fitting. And therefore, the problem of paint pollution caused by the fact that crushed material impurities are mixed in paint can be avoided, and the roller painting quality is further improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of roller coating equipment, specifically relating to a roller coating machine that can reliably control the pressure between rollers. Background Technology

[0002] Roller coaters are the core equipment for realizing the roller coating process. Due to their advantages such as high precision in film thickness control and wide adaptability to coating viscosity, they are widely used in cold-rolled strip processing units, including color coating, galvanizing, and silicon steel coating. Roller coaters are mainly classified into vertical roller coaters and horizontal roller coaters according to the strip's orientation. The coating roller assembly has its own drive system. The roller surface is generally made of non-metallic materials, such as rubber. The pressure between the rollers is closely related to the pressure between the coating roller and the substrate; changes in pressure between the coating roller and the substrate will cause changes in the roller pressure. During normal production, the target value of the inter-roller pressure is determined based on the pre-coated film thickness. The lifting drive device drives the coating roller to rise and fall, adjusting the sensor reading to make it equal to or approximately equal to the sum of the target inter-roller pressure value and the weight of the feed roller. During the adjustment process, the pressure between the coating roller and the substrate also changes—meaning that the inter-roller pressure cannot be adjusted independently without changing the pressure between the coating roller and the substrate. Moreover, even slight changes in the sensor reading will cause the lifting drive device to operate frequently, and the coating roller will also frequently perform small rising and falling movements, resulting in unstable coating effects, i.e., unstable coating thickness control. Therefore, accurately controlling the inter-roller pressure is a challenge in coating thickness control.

[0003] To address this, a roller coating machine with reliable control of inter-roller pressure, as disclosed in publication number "CN220258518U", includes a frame, a coating roller, and a feed roller. The coating roller is equipped with a lifting drive mechanism for raising and lowering it. The lifting drive mechanism includes a transition support and a lifting drive unit for raising and lowering the transition support. A first pressure detection unit is provided on the frame. The feed roller rests against the first pressure detection unit, and the transition support rests against the roller seat of the feed roller, with a second pressure detection unit sandwiched between them. In this invention, the combination of the first and second pressure detection units is used to monitor the working status of the roller coating machine. This reliably grasps and eliminates the influence of the pressure between the coating roller and the substrate on the inter-roller pressure, effectively improving the stability and reliability of the inter-roller pressure control, thereby enabling precise control of the coating thickness.

[0004] However, even though the coating roller is located directly above the feed roller and rests against its top, and the feed roller is located directly above the first pressure detection unit and rests against its upper surface, the following significant defects still exist during use: the coating roller contacts the dip roller during coating to transfer the coating material. During the coating process, some debris and impurities adhere to the surface of the roller. Since there is no structure to clean and remove these debris and impurities, they are prone to falling into the coating tank, which can contaminate the coating material and affect the quality of the coated fabric. Utility Model Content

[0005] The purpose of this invention is to provide a roller coating machine that can reliably control the pressure between rollers, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a roller coating machine capable of reliably controlling the pressure between rollers, comprising:

[0007] The frame has a dip roller that rotates through a paint trough at one end of the frame to pick up and transfer paint. One side of the dip roller is attached to a scraper hopper plate on the roller surface for scraping, cleaning and collecting the paint. The frame end has a frame frame for installing the structural components of the roller coating machine inside.

[0008] A fixed bracket is provided on both sides of the inner side of the frame. A coating roller that rotatably fits against the end of the dipping roller is provided at the end of the fixed bracket. A movable bracket is vertically guided on the fixed bracket. A pressure roller that presses against the coating roller and adjusts the pressure between the rollers is provided on the inner side of the movable bracket.

[0009] Preferably, a paint stirring shaft is rotatably provided in the paint tank, and one end of the paint stirring shaft is connected to a servo motor through a drive. A material receiving trough is provided on the outside of the paint tank, which can stir the paint in the paint tank and keep it in motion.

[0010] Preferably, a feeding pipe is provided through the end of the frame and on one side of the paint tank, and the bottom end of the feeding pipe is perpendicular to the receiving trough, and the end of the feeding pipe is perpendicular to the discharge end of the inclined scraper hopper, so as to scrape and collect the fragments and impurities adhering to the dipping roller.

[0011] Preferably, the fixed bracket has rotating shaft seats on both sides of the center position at the end, and the coating roller is rotatably disposed between the inner sides of the rotating shaft seats. Two guide rods are provided longitudinally on both sides of the fixed bracket to adjust the gap and pressure between the coating roller and the pressing roller.

[0012] Preferably, the center positions of the bottom two sides of the movable bracket are equipped with pressure sensors that are perpendicular to the rotating shaft seat and are provided with pressure rods. The movable bracket moves vertically through the guide rod, which can detect and adjust the gap pressure between the pressing roller and the coating roller.

[0013] Preferably, an electric cylinder is provided at the top of the inner side of the frame, one end of which is fixed to the end of the movable support. A guide clamping roller is rotatably provided inside the guard frame on the inlet and outlet on both sides of the outer side of the frame. A control box with a pressure value display is provided at the end of the guard frame, so that the pressure value detected by the sensor can be displayed on the control box, so as to adjust the pressure of the pressing roller.

[0014] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This roller coating machine, which can reliably control the pressure between rollers, achieves the following through the coordinated use of the dipping roller, scraper hopper, feeding pipe, and receiving trough in the paint tank. When the dipping roller rolls and transfers the paint in the paint tank to the coating roller, the direct contact between the coating roller and the fabric causes debris to adhere to its surface. Furthermore, the contact between the coating roller and the dipping roller transfers the adhered debris to the surface of the dipping roller and into the paint in the paint tank. As the dipping roller rotates and transfers the paint, the scraper hopper scrapes and cleans the plastic impurities and paint mixture on the surface of the dipping roller. The scraped debris is then collected in the receiving trough through the feeding pipe via the inclined scraper hopper, thus avoiding the problem of debris mixing in the paint and causing paint contamination, and further improving the quality of roller coating.

[0015] By utilizing the movable support, the bonding of the pressure roller and the coating roller, the electric cylinder, the guide rod, the rotating shaft seat, the pressure sensor, and the control box with pressure display, the pressure between the rollers can be controlled in real time and with precision by extending and retracting the electric cylinder mounted on the movable support of the coating roller, combined with the pressure sensor and the control box with pressure display. Furthermore, it can accurately adjust the pressure between the rollers to ensure a uniform coating thickness when encountering uneven material thickness or changes in coating viscosity during the coating process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a side view of the internal structure of the frame of this utility model;

[0018] Figure 3 This is a side view of the internal structure of the coating tank of this utility model.

[0019] In the diagram: 1. Frame; 2. Coating tank; 3. Dipping roller; 4. Scraper hopper; 5. Frame frame; 6. Fixed bracket; 7. Coating roller; 8. Movable bracket; 9. Pressing roller; 10. Coating mixing shaft; 11. Servo motor; 12. Receiving trough; 13. Discharge pipe fitting; 14. Rotary shaft seat; 15. Guide vertical rod; 16. Pressure sensor; 17. Electric cylinder; 18. Material guide clamping roller; 19. Control box. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: a roller coating machine that can reliably control the pressure between rollers, comprising:

[0022] The frame 1 serves as the supporting structure for the entire roller coating machine, ensuring the installation accuracy and relative stability of each component. A dipping roller 3 is rotatably mounted on one side of the end of the frame 1 through a paint tank 2, which is set through the end of the frame 1. The paint tank 2 is used to hold the paint, and the dipping roller 3 is partially immersed in the paint. During rotation, it dips the paint and transfers it to the coating roller 7. One side of the dipping roller 3 is attached to the roller surface for scraping, cleaning and collecting the paint. The scraper plate 4 scrapes off the paint containing impurities and prevents it from being carried into the paint tank 2. The end of the frame 1 is provided with a frame frame 5, which allows the structural components of the roller coating machine to be installed inside. It covers the coating roller 7, pressure roller 9 and other components to prevent paint splashing and dust from entering.

[0023] A fixed bracket 6 is installed on both sides of the inner side of the frame 5. A coating roller 7 is rotatably mounted at the end of the fixed bracket 6 and is in contact with the end of the dipping roller 3. The coating roller 7 is tangent to the dipping roller 3, so that the coating is evenly distributed on the surface of the coating roller 7. Then, through cooperation with the pressure roller 9, the coating is applied to the material to be processed. A movable bracket 8 is vertically guided on the fixed bracket 6. A pressure roller 9 is rotatably mounted on the inner side of the movable bracket 8 and is in close contact with the coating roller 7 to adjust the pressure between the rollers. The extension and retraction of the electric cylinder 17 pushes the movable bracket 8 to move, thereby changing the gap between the coating roller 7 and the pressure roller 9 and realizing the adjustment of the pressure between the rollers.

[0024] A paint stirring shaft 10 is rotatably installed in the paint tank 2. Stirring rods are evenly arranged on the paint stirring shaft 10, and a servo motor 11 is connected to one end of the paint stirring shaft 10. The servo motor 11 is fixed on the outer side of the paint tank 2. When the servo motor 11 is started, it drives the paint stirring shaft 10 and the stirring rods to rotate, so that the paint maintains a uniform concentration and fluidity. A collection trough 12 is provided on the outer side of the paint tank 2 to collect paint mixed with fragments and impurities, thereby reducing the contamination of the paint.

[0025] A feeding pipe 13 is provided through the end of the frame 1 and on one side of the paint tank 2. The feeding pipe 13 extends to the bottom of the frame 1, and the bottom end of the feeding pipe 13 is perpendicular to the receiving trough 12. The end of the feeding pipe 13 is perpendicular to the discharge end of the inclined scraper hopper 4. The scraped mixture of paint and debris is fed into the receiving trough 12.

[0026] The fixed bracket 6 has two rotating shaft seats 14 on both sides of the center position at the end, so that the rotating shafts at both ends of the coating roller 7 are rotatably set in the bearings of the rotating shaft seats 14. The coating roller 7 is rotatably set between the inner sides of the rotating shaft seats 14. The fixed bracket 6 has two longitudinal guide rods 15 on both sides, so that the movable bracket 8 can slide and adjust the pressure while maintaining a vertical and stable state. The center positions of the bottom sides of the movable bracket 8 are equipped with pressure rods and pressure sensors 16 that are vertically corresponding to the rotating shaft seats 14. The pressure sensors adjust the clamping force between the pressing roller 9 and the coating roller 7, monitor the pressure between the rollers in real time, and transmit the pressure signal to the control box 19 to display the pressure value. The movable bracket 8 moves vertically guided through the guide rods 15.

[0027] An electric cylinder 17 is installed at the top of the inner part of the frame 5, and one end of the electric cylinder 17 is fixed to the end of the movable bracket 8. The control box 19 controls the electric cylinder 17 to push the movable bracket 8 to slide vertically. The inlet and outlet ports on both sides of the outer side of the frame 5 are equipped with guide rollers 18 that rotate inside the guard frame. These rollers can guide and guide the input and output materials to avoid contact with the frame 5 and causing scratches. The end of the guard frame is equipped with a control box 19 that displays the pressure value. The control box 19 includes a PLC control system and a numerical display structure, which are existing technologies. The PLC control system is used to control the status operation of each structure in the roller coating machine and to receive and display the pressure signal monitored by the pressure sensor 16. The PLC control system and the numerical display structure are existing public technologies, so they will not be described in detail.

[0028] Specifically, in use, the material to be coated is first passed through the guide clamping roller 18 between the coating roller 7 and the pressure roller 9. Based on the material's characteristics and coating requirements, the initial inter-roller pressure parameters are set via the control box 19. After starting the roller coater, the paint stirring shaft 10 in the paint tank 2 rotates via the servo motor 11, causing the stirring rod to rotate as well, uniformly mixing the paint in the paint tank 2. The dipping roller 3 rotates to pick up the paint from the paint tank 2 and transfers it to the coating roller 7. The coating roller 7 and the pressure roller 9 then coat the material. The pressure sensor 16 monitors the inter-roller pressure in real time and feeds back the pressure signal to the control box 19, displaying the pressure value. When the PLC control system in the control box 19 detects a deviation between the roller pressure and the preset value, it immediately controls the electric cylinder 17 to extend and retract to adjust the pressure roller 9 on the movable bracket 8. At the same time, the pressure sensor 16 presses down on the rotating shaft seat 14 to detect the adjustment pressure, ensuring that the roller pressure is always kept within the set range, thereby ensuring the uniformity and quality of the coating. Meanwhile, since the coating roller 7 is in direct contact with the material to be coated, debris and impurities will adhere to its surface. Furthermore, the contact between the coating roller 7 and the dipping roller 3 will transfer the adhered debris and impurities to the surface of the dipping roller 3 and into the coating in the coating tank 2. As the dipping roller 3 rotates and transfers the coating, the scraper hopper 4 scrapes and cleans the plastic impurities and coating mixture on the surface of the dipping roller 3. The scraped debris and impurities are collected in the receiving trough 12 through the discharge pipe 13 by the inclined scraper hopper 4.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A roller coating machine capable of reliably controlling the pressure between rollers, characterized in that, include: The frame (1) has a dip roller (3) that rotatably picks up and transfers paint through a paint trough (2) at one end of the frame (1). A scraper hopper (4) for scraping, cleaning and collecting paint is attached to one side of the dip roller (3). The frame (1) has a frame frame (5) at the end of the frame (1) for installing the structural components of the roller coating machine inside. A fixed bracket (6) is provided on both sides of the inner side of the frame (5). The end of the fixed bracket (6) is rotatably provided with a coating roller (7) that fits against the end of the dipping roller (3). A movable bracket (8) is vertically guided on the fixed bracket (6). A pressing roller (9) is rotatably provided on the inner side of the movable bracket (8) that presses against the coating roller (7) and adjusts the pressure between the rollers.

2. The roller coating machine according to claim 1, characterized in that: The paint tank (2) is equipped with a paint stirring shaft (10) that rotates in the paint tank (2), and one end of the paint stirring shaft (10) is connected to a servo motor (11) through a transmission. A receiving trough (12) is provided on the outside side of the paint tank (2).

3. A roller coating machine capable of reliably controlling inter-roller pressure according to claim 2, characterized in that: The end of the frame (1) and one side of the paint tank (2) are provided with a feeding pipe (13), and the bottom end of the feeding pipe (13) is perpendicular to the receiving trough (12), and the end of the feeding pipe (13) is perpendicular to the discharge end of the inclined scraper hopper (4).

4. A roller coating machine capable of reliably controlling inter-roller pressure according to claim 1, characterized in that: The fixed bracket (6) has a rotating shaft seat (14) on both sides of the center position at the end. The coating roller (7) is rotatably arranged between the inner sides of the rotating shaft seat (14). The fixed bracket (6) has two guide rods (15) longitudinally arranged on both sides.

5. A roller coating machine capable of reliably controlling inter-roller pressure according to claim 4, characterized in that: The center positions of the bottom sides of the movable bracket (8) are connected by pressure sensors (16) that are perpendicular to the rotating shaft seat (14) and pressure rods. The movable bracket (8) moves vertically through the guide rod (15).

6. A roller coating machine capable of reliably controlling inter-roller pressure according to claim 1, characterized in that: An electric cylinder (17) is provided at the top of the inside of the frame (5). One end of the electric cylinder (17) is fixed to the end of the movable bracket (8). A guide clamping roller (18) is rotatably provided in the guard frame on the inlet and outlet on both sides of the outside of the frame (5). A control box (19) with a pressure value display is provided at the end of the guard frame.

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