A cost-effective pre-treatment coating apparatus and process

Abstract

The application relates to a saving type pretreatment coating device and process, which comprises a rack, a conveying assembly for conveying a steel plate is arranged on the rack, a first coating roller is arranged below the steel plate on the conveying assembly steel plate output side, the first coating roller is rotationally connected with the rack, a liquid storage tank is arranged below the first coating roller on the rack, two material blocking plates are movably arranged in the liquid storage tank, and material blocking openings matched with the first coating roller are formed in the material blocking plates. The steel plate passes below the first coating roller, the distance between the two material blocking plates is adjusted according to the width of the steel plate, the two material blocking plates and the liquid storage tank form a material dipping space of the coating roller, passivation liquid is added between the two material blocking plates in the liquid storage tank, the first coating roller is rotated, the first coating roller dips the passivation liquid to coat the lower surface of the steel plate, the steel plate is passivated, and there is no passivation liquid on the position where the first coating roller does not contact the steel plate, so that the use amount of the passivation liquid in the coating process is saved.

Description

Technical Field

[0001] This application relates to the technical field of coating, and in particular to an economical pretreatment coating equipment and process. Background Technology

[0002] A coating machine is an important piece of equipment in the coating process. It is used to apply a layer of adhesive, paint, or ink with specific functions to the coating area on a substrate surface, and then rewinds it after drying. Passivation solutions are solutions that passivate metal surfaces. They are generally used for post-plating treatment of zinc, cadmium, and other coatings. The purpose is to form a surface condition on the coating that prevents normal metal reactions, improving its corrosion resistance and enhancing the product's appearance.

[0003] Related technology can be found in Chinese Patent No. CN210700855U, which discloses a coating mechanism for a coating machine, including a frame, a hopper, and a feeding roller. The feeding roller is rotatably connected to the frame at both ends. The hopper is located below the feeding roller and contains the coating agent. The lower end of the feeding roller is submerged in the coating agent. The machine also includes a lifting device, which is located above the hopper. The lifting device includes a take-up roller, a pull rope, and a rotating motor. The take-up roller is located above the feeding roller and is rotatably connected to the frame at both ends. The rotating motor is located on one side of the take-up roller and is fixedly connected to the take-up roller. The pull rope is located on both sides of the hopper. One end of the pull rope is fixedly connected to the center of one side of the hopper, and the other end of the pull rope is fixedly connected to the take-up roller.

[0004] Regarding the aforementioned technologies, the lower end of the feeding roller is submerged in the coating agent in the hopper. However, since the steel plates that need to be coated have different widths, the coating agent on the parts of the feeding roller that are not in contact with the steel plate cannot be applied to the surface of the steel plate, resulting in waste. Summary of the Invention

[0005] To reduce the amount of passivation solution used during the coating process, this application provides an economical pretreatment coating equipment and process.

[0006] This application provides an economical pretreatment coating equipment and process, which adopts the following technical solution: In a first aspect, this application provides an economical pretreatment coating device, which adopts the following technical solution: An energy-saving pretreatment coating device includes a frame, on which a conveying assembly for conveying steel plates is provided. A first coating roller located below the steel plate is provided on the output side of the conveying assembly. The first coating roller is rotatably connected to the frame. A liquid storage tank located below the first coating roller is provided on the frame. Two baffles are movably arranged in the liquid storage tank. The baffles have baffle openings that cooperate with the first coating roller.

[0007] By adopting the above technical solution, the steel plate is conveyed by the conveying assembly. The steel plate passes under the first coating roller. The distance between the two baffles is adjusted according to the width of the steel plate. The two baffles and the liquid storage tank form the immersion space of the coating roller. Passivating liquid is added between the two baffles in the liquid storage tank. The first coating roller is rotated, and the first coating roller is coated with passivating liquid onto the lower surface of the steel plate to passivate the steel plate. There is no passivating liquid in the position where the first coating roller does not contact the steel plate, which saves the amount of passivating liquid used in the coating process.

[0008] Optionally, a movable rod is provided in the liquid storage tank along the length of the liquid storage tank. The movable rod passes through two baffle plates and is movably connected to the baffle plates. The baffle plates are provided with fixing members for fixing the baffle plates and the movable rod.

[0009] By adopting the above technical solution, the movement of the two baffles is limited and guided by the moving rod, thereby improving the stability of the baffles moving in the liquid storage tank. The baffles and the moving rod are fixed by the fixing component.

[0010] Optionally, the fixing component includes a fixing nut, and the moving rod has a plurality of fixing holes adapted to the fixing nut. The fixing nut passes through the baffle plate and is threadedly connected to the baffle plate.

[0011] By adopting the above technical solution, the baffle plate is moved along the moving rod. When the position of the baffle plate corresponds to the position of the side of the steel plate, the fixing nut is rotated and inserted into the corresponding fixing hole for fixing.

[0012] Optionally, a discharge nozzle is provided on one of the baffle plates near the other baffle plate. The discharge nozzle is connected to a discharge pipe. The end of the discharge pipe away from the discharge nozzle is connected to a storage tank containing passivation liquid. The baffle plate is provided with a pipe clamp for limiting the discharge pipe.

[0013] By adopting the above technical solution, passivating liquid is delivered into the storage tank between the baffle plates through the discharge nozzle, and the discharge pipe is limited by the pipe clamp, so as to facilitate timely replenishment of passivating liquid into the storage tank.

[0014] Optionally, a connecting frame is provided above the frame, and a second coating roller located above the steel plate is rotatably connected to the connecting frame. A feeding assembly located above the second coating roller is provided on the connecting frame, and the feeding assembly is used to apply passivation liquid to the surface of the second coating roller.

[0015] By adopting the above technical solution, a passivation liquid is applied to the upper surface of the steel plate by a second coating roller, and the passivation liquid is applied to the upper and lower surfaces of the steel plate simultaneously.

[0016] Optionally, the feeding assembly includes a feeding box and a flow stabilizer tube. The feeding box is positioned above the second coating roller, and the flow stabilizer tube is placed at an angle. The upper end of the flow stabilizer tube is connected to the feeding box, and the other end is attached to the second coating roller. A flow limiter is provided inside the flow stabilizer tube to limit the flow of the passivation liquid.

[0017] By adopting the above technical solution, passivation liquid is filled into the feeding box and transported to the surface of the second coating roller along the flow stabilizing pipe. The flow rate of the passivation liquid in the flow stabilizing pipe is adjusted by the speed limiting component to adjust the speed of the passivation liquid transported to the second coating roller by the flow stabilizing pipe, so as to avoid the passivation liquid flow rate being too fast, resulting in uneven coating and saving the amount of passivation liquid used in the coating process.

[0018] Optionally, the speed limiting component includes a speed limiting plate, a speed limiting rack, and a speed limiting gear. The upper end face of the flow stabilizing tube has an opening, and both sides of the inner wall of the flow stabilizing tube have speed limiting grooves communicating with the opening. The speed limiting plate extends into the flow stabilizing tube from the opening and the speed limiting grooves. The speed limiting rack is installed on the side of the limiting plate near the limiting groove. The speed limiting gear is rotatably connected to the flow stabilizing tube and meshes with the speed limiting rack.

[0019] By adopting the above technical solution, the speed limiting gear is rotated, and the speed limiting rack meshing with the speed limiting gear drives the speed limiting plate to move, thereby adjusting the distance between the lower end face of the speed limiting plate and the bottom of the flow stabilizing tube, so as to adjust the flow rate of the passivating liquid in the flow stabilizing tube.

[0020] Optionally, a shielding assembly is provided near the inlet of the second coating roller in the flow stabilizing tube. The shielding assembly includes a bidirectional lead screw and two shielding plates. The two shielding plates block the flow stabilizing tube near the inlet of the second coating roller and are movably connected to the flow stabilizing tube. The bidirectional lead screw is rotatably connected to the flow stabilizing tube. The upper ends of the two shielding plates are respectively fixedly connected to connecting blocks threaded to the bidirectional lead screw. The two connecting blocks are located on both sides of the bidirectional lead screw. When the bidirectional lead screw rotates, the two shielding plates open to both sides of the flow stabilizing tube.

[0021] By adopting the above technical solution, by rotating the bidirectional lead screw, the two baffles open to both sides of the flow stabilizer tube. The opening space of the two baffles is adjusted according to the width of the steel plate. The passivation liquid in the flow stabilizer tube flows out along the opening space of the two baffles onto the second coating roller, reducing the possibility of passivation liquid on the second coating roller in the position where it does not contact the steel plate, thus saving the amount of passivation liquid used in the coating process.

[0022] Secondly, this application provides a cost-saving pretreatment coating process, which adopts the following technical solution: An economical pretreatment coating process, using the aforementioned economical pretreatment coating equipment, includes the following steps: S1. Adjust the distance between the two baffles according to the width of the steel plate so that the distance between the two baffles matches the width of the steel plate. S2. Based on the width of the steel plate, rotate the double-acting screw to adjust the distance between the two shielding plates so that the distance between the two shielding plates matches the width of the steel plate. S3. The steel plate is conveyed by the conveying assembly, and passivation liquid is added to the storage tank and the feeding box respectively. The passivation liquid in the storage tank is coated on the lower surface of the steel plate by the first coating roller, and the passivation liquid in the feeding box flows to the second coating roller through the flow stabilizing pipe. The passivation liquid on the second coating roller is coated on the upper surface of the steel plate, and the upper and lower surfaces of the steel plate are passivated at the same time.

[0023] By adopting the above technical solution, the upper and lower surfaces of the steel plate are passivated simultaneously, and the amount of passivation liquid on the first coating roller and the second coating roller is controlled, thereby saving the amount of passivation liquid used in the coating process.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The steel plate is conveyed by the conveying assembly. The steel plate passes under the first coating roller. The distance between the two baffles is adjusted according to the width of the steel plate. The two baffles and the liquid storage tank form the immersion space of the coating roller. Passivation liquid is added between the two baffles in the liquid storage tank. The first coating roller is rotated. The first coating roller is dipped in the passivation liquid and coated on the lower surface of the steel plate to passivate the steel plate. There is no passivation liquid in the position where the first coating roller does not contact the steel plate, which saves the amount of passivation liquid used in the coating process. 2. Fill the feed box with passivation liquid. The passivation liquid is delivered to the surface of the second coating roller along the flow stabilizer. The flow rate of the passivation liquid in the flow stabilizer is adjusted by the speed limiting component to adjust the speed of the passivation liquid delivered to the second coating roller by the flow stabilizer, so as to avoid the passivation liquid flow rate being too fast, resulting in uneven coating and saving the amount of passivation liquid used in the coating process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a cost-saving pretreatment coating equipment.

[0026] Figure 2 This is a schematic diagram highlighting the structure of the first coating roller and the second coating roller.

[0027] Figure 3 This is a schematic diagram highlighting the connection relationship between the speed limiting rack and speed limiting gear inside the flow stabilizing tube.

[0028] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Conveying assembly; 12. Connecting frame; 2. First coating roller; 3. Liquid storage tank; 31. Moving rod; 311. Fixing hole; 4. Baffle plate; 41. Fixing nut; 42. Discharge nozzle; 43. Discharge pipe; 44. Pipe clamp; 5. Second coating roller; 6. Feeding box; 7. Flow stabilizing pipe; 71. Speed ​​limiting plate; 72. Speed ​​limiting rack; 73. Speed ​​limiting gear; 731. Rotating rod; 732. Rotating component; 74. Bidirectional lead screw; 75. Material shielding plate; 751. Connecting block; 8. Connecting pipe; 81. Electrically controlled valve. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] This application discloses an economical pretreatment coating equipment and process.

[0031] Reference Figure 1 An energy-saving pretreatment coating device includes a frame 1, on which a conveying assembly 11 for conveying steel plates is provided. The steel plates to be passivated are conveyed through the conveying assembly 11. The conveying assembly 11 may be composed of several conveying rollers, which is prior art and will not be described in this application.

[0032] Reference Figure 1 and Figure 2 The conveying assembly 11 has a first coating roller 2 located below the steel plate on the output side of the steel plate. The first coating roller 2 is rotatably connected to the frame 1. A liquid storage tank 3 located below the first coating roller 2 is fixedly connected to the frame 1. Passivation liquid is added to the liquid storage tank 3. The first coating roller 2 comes into contact with the passivation liquid in the liquid storage tank 3. The passivation liquid adheres to the first coating roller 2. The first coating roller 2 rotates to coat the passivation liquid onto the lower surface of the steel plate.

[0033] Two baffle plates 4 are movably installed inside the liquid storage tank 3. The baffle plates 4 have baffle openings that cooperate with the first coating roller 2. A movable rod 31 is fixedly connected to the liquid storage tank 3 along its length. The movable rod 31 passes through the two baffle plates 4 and is movably connected to them. The movable rod 31 limits and guides the movement of the two baffle plates 4. The distance between the two baffle plates 4 is adjusted according to the width of the steel plate. The two baffle plates 4 and the liquid storage tank 3 form the immersion space for the coating roller. Passivation liquid is added between the two baffle plates 4 in the liquid storage tank 3. The first coating roller 2 is rotated. The first coating roller 2 is coated with passivation liquid onto the lower surface of the steel plate to passivate the steel plate. There is no passivation liquid in the position where the first coating roller 2 does not contact the steel plate, saving the amount of passivation liquid used in the coating process.

[0034] The baffle plate 4 is provided with a fixing component for fixing the baffle plate 4 and the moving rod 31. The fixing component includes a fixing nut 41. The moving rod 31 has several fixing holes 311 that are adapted to the fixing nut 41. The fixing nut 41 passes through the baffle plate 4 and is threadedly connected to the baffle plate 4. The baffle plate 4 is moved along the moving rod 31. When the position of the baffle plate 4 corresponds to the position of the side of the steel plate, the fixing nut 41 is rotated and inserted into the corresponding fixing hole 311 for fixing.

[0035] A discharge nozzle 42 is installed on the side of one baffle plate 4 close to the other baffle plate 4. The discharge nozzle 42 is connected to a discharge pipe 43. The end of the discharge pipe 43 away from the discharge nozzle 42 is connected to a storage tank containing passivation liquid. The passivation liquid is delivered to the storage tank 3 between the baffle plates 4 through the discharge nozzle 42, so that the passivation liquid can be replenished into the storage tank 3 in a timely manner. A pipe clamp 44 is installed on the baffle plate 4 to limit the discharge pipe 43.

[0036] Reference Figure 2 and Figure 3 A connecting frame 12 is fixedly connected above the frame 1. A second coating roller 5 located above the steel plate is rotatably connected to the connecting frame 12. A feeding component located above the second coating roller 5 is installed on the connecting frame 12. The feeding component is used to apply passivation liquid to the surface of the second coating roller 5. The passivation liquid is applied to the upper surface of the steel plate through the second coating roller 5, and the passivation liquid is applied to the upper and lower surfaces of the steel plate simultaneously.

[0037] The feeding assembly includes a feeding box 6 and a flow stabilizing pipe 7. The feeding box 6 is positioned above the second coating roller 5. The flow stabilizing pipe 7 is placed at an angle. The upper end of the flow stabilizing pipe 7 is connected to the feeding box 6, and the other end is attached to the second coating roller 5. The feeding box 6 is filled with passivation liquid, which is then transported to the surface of the second coating roller 5 along the flow stabilizing pipe 7.

[0038] The flow stabilizing pipe 7 and the feeding box 6 are connected by a connecting pipe 8. An electric control valve 81 is installed on the connecting pipe 8. The passivation liquid in the feeding box 6 is controlled by the electric control valve 81 to flow from the connecting pipe 8 to the flow stabilizing pipe 7.

[0039] The flow stabilizing pipe 7 is equipped with a speed limiting component for limiting the flow of passivating liquid. The speed limiting component includes a speed limiting plate 71, a speed limiting rack 72, and a speed limiting gear 73. An opening is provided on the upper end face of the flow stabilizing pipe 7, and speed limiting grooves communicating with the opening are provided on both sides of the inner wall of the flow stabilizing pipe 7. The speed limiting plate 71 extends into the flow stabilizing pipe 7 from the opening and the speed limiting groove. The speed limiting rack 72 is installed on the side of the limiting plate near the limiting groove. The speed limiting gear 73 is rotatably connected to the flow stabilizing pipe 7 and meshes with the speed limiting rack 72. By rotating the speed limiting gear 73, the speed limiting rack 72 meshing with the speed limiting gear 73 drives the speed limiting plate 71 to move, adjusting the distance between the lower end face of the speed limiting plate 71 and the bottom of the flow stabilizing pipe 7, thereby adjusting the flow rate of the passivating liquid in the flow stabilizing pipe 7. A rotating rod 731 is inserted into the speed limiting groove through the outside of the flow stabilizing tube 7. The rotating rod 731 is coaxially and fixedly connected to the speed limiting gear 73. A rotating component 732 is installed at the end of the rotating rod 731 away from the speed limiting gear 73. The rotating component 732 facilitates the rotation of the rotating rod 731, thereby causing the speed limiting gear 73 to rotate, which facilitates the adjustment of the distance between the lower end face of the speed limiting plate 71 and the bottom of the flow stabilizing tube 7.

[0040] A shielding assembly is installed near the inlet of the second coating roller 5 on the flow stabilizing pipe 7. The shielding assembly includes a bidirectional lead screw 74 and two shielding plates 75. The two shielding plates 75 block the flow stabilizing pipe 7 near the inlet of the second coating roller 5 and are movably connected to the flow stabilizing pipe 7. The bidirectional lead screw 74 is rotatably connected to the flow stabilizing pipe 7. The upper ends of the two shielding plates 75 are respectively fixedly connected to connecting blocks 751 that are threaded to the bidirectional lead screw 74. The two connecting blocks 751 are located on both sides of the bidirectional lead screw 74. When the bidirectional lead screw 74 rotates, the two shielding plates 75 open to both sides of the flow stabilizing pipe 7. The opening space of the two shielding plates is adjusted according to the width of the steel plate. The passivation liquid in the flow stabilizing pipe 7 flows out to the second coating roller 5 through the opening space of the two shielding plates, reducing the possibility of passivation liquid on the second coating roller 5 at the position where the second coating roller 5 does not contact the steel plate, thus saving the amount of passivation liquid used during the coating process.

[0041] The implementation principle of the energy-saving pretreatment coating equipment in this application embodiment is as follows: Based on the width of the steel plate, the distance between the two baffle plates 4 is adjusted to match the width of the steel plate. The distance between the two shielding plates 75 is also adjusted to match the width of the steel plate. The steel plate is conveyed through the conveying assembly 11. Passivating liquid is added to the storage tank 3 and the feeding box 6 respectively. The passivating liquid in the storage tank 3 is applied to the lower surface of the steel plate by the first coating roller 2. The passivating liquid in the feeding box 6 flows to the second coating roller 5 through the flow stabilizing pipe 7. The passivating liquid on the second coating roller 5 is applied to the upper surface of the steel plate, thus simultaneously passivating both the upper and lower surfaces of the steel plate, saving the amount of passivating liquid used during the coating process.

[0042] This application also discloses a cost-saving pretreatment coating process, including the following steps: S1. Adjust the distance between the two baffle plates 4 according to the width of the steel plate so that the distance between the two baffle plates 4 matches the width of the steel plate. S2. Based on the width of the steel plate, rotate the double-acting screw 74 to adjust the distance between the two shielding plates 75 so that the distance between the two shielding plates 75 matches the width of the steel plate. S3. The steel plate is conveyed through the conveying assembly 11, and passivation liquid is added to the storage tank 3 and the feeding box 6 respectively. The passivation liquid in the storage tank 3 is coated on the lower surface of the steel plate by the first coating roller 2, and the passivation liquid in the feeding box 6 flows to the second coating roller 5 through the flow stabilizing pipe 7. The passivation liquid on the second coating roller 5 is coated on the upper surface of the steel plate, and the upper and lower surfaces of the steel plate are passivated at the same time.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving pretreatment coating device, comprising a frame (1), wherein a conveying assembly (11) for conveying steel plates is provided on the frame (1), characterized in that: The conveying assembly (11) has a first coating roller (2) located below the steel plate on the output side of the steel plate. The first coating roller (2) is rotatably connected to the frame (1). The frame (1) has a liquid storage tank (3) located below the first coating roller (2). Two baffles (4) are movably arranged in the liquid storage tank (3). The baffles (4) have baffle openings that cooperate with the first coating roller (2). A connecting frame (12) is provided above the frame (1). A second coating roller (5) located above the steel plate is rotatably connected to the connecting frame (12). A feeding assembly located above the second coating roller (5) is provided on the connecting frame (12). The feeding assembly is used to apply passivation liquid to the surface of the second coating roller (5). The feeding assembly includes a feeding box (6) and a flow stabilizer (7). The feeding box (6) is located above the second coating roller (5). The flow stabilizer (7) is placed at an angle. The upper end of the flow stabilizer (7) is connected to the feeding box (6), and the other end is attached to the second coating roller (5). The flow stabilizer (7) is equipped with a flow limiting component to limit the flow of the passivation liquid. A shielding assembly is provided near the opening of the second coating roller (5) of the flow stabilizing tube (7). The shielding assembly includes a bidirectional screw (74) and two shielding plates (75). The two shielding plates (75) block the opening of the flow stabilizing tube (7) near the second coating roller (5) and are movably connected to the flow stabilizing tube (7). The bidirectional screw (74) is rotatably connected to the flow stabilizing tube (7). The upper ends of the two shielding plates (75) are respectively fixedly connected to connecting blocks (751) that are threaded to the bidirectional screw (74). The two connecting blocks (751) are located on both sides of the bidirectional screw (74). When the bidirectional screw (74) rotates, the two shielding plates (75) open to both sides of the flow stabilizing tube (7).

2. The energy-saving pretreatment coating equipment according to claim 1, characterized in that: A movable rod (31) is provided inside the liquid storage tank (3) along the length direction of the liquid storage tank (3). The movable rod (31) passes through two baffle plates (4) and is movably connected to the baffle plates (4). The baffle plates (4) are provided with a fixing member for fixing the baffle plates (4) and the movable rod (31).

3. The energy-saving pretreatment coating equipment according to claim 1, characterized in that: A discharge nozzle (42) is provided on the side of one of the baffle plates (4) near the other baffle plate (4). The discharge nozzle (42) is connected to a discharge pipe (43). The end of the discharge pipe (43) away from the discharge nozzle (42) is connected to a storage tank containing passivation liquid. A pipe clamp (44) is provided on the baffle plate (4) for limiting the discharge pipe (43).

4. The energy-saving pretreatment coating equipment according to claim 1, characterized in that: The speed limiting assembly includes a speed limiting plate (71), a speed limiting rack (72), and a speed limiting gear (73). The upper end face of the flow stabilizing tube (7) has an opening, and the two sides of the inner wall of the flow stabilizing tube (7) have speed limiting grooves communicating with the opening. The speed limiting plate (71) extends into the flow stabilizing tube (7) from the opening and the speed limiting groove. The speed limiting rack (72) is installed on the side of the speed limiting plate (71) near the speed limiting groove. The speed limiting gear (73) is rotatably connected to the flow stabilizing tube (7) and meshes with the speed limiting rack (72).

5. A cost-saving pretreatment coating process, employing the cost-saving pretreatment coating equipment as described in any one of claims 1-4, characterized in that: Includes the following steps: S1. Adjust the distance between the two baffles (4) according to the width of the steel plate so that the distance between the two baffles (4) matches the width of the steel plate. S2. According to the width of the steel plate, rotate the double-acting screw (74) to adjust the distance between the two shielding plates (75) so that the distance between the two shielding plates (75) matches the width of the steel plate. S3. The steel plate is conveyed through the conveying assembly (11), and passivation liquid is added to the storage tank (3) and the feeding box (6) respectively. The passivation liquid in the storage tank (3) is coated on the lower surface of the steel plate by the first coating roller (2), and the passivation liquid in the feeding box (6) flows to the second coating roller (5) through the flow stabilizing pipe (7). The passivation liquid on the second coating roller (5) is coated on the upper surface of the steel plate, and the upper and lower surfaces of the steel plate are passivated at the same time.

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