Equipment for improving surface wettability of tin plate

Abstract

The utility model provides equipment for improving the surface wettability of a tin plate, which comprises a shell, the shell is inverted T-shaped, a conveyor belt is horizontally erected at the lower part of the shell, the conveyor belt has conductivity and is grounded, a discharge unit is arranged at the upper part of the shell, the discharge unit comprises a cover shell, and the cover shell is arranged on the lower part of the shell. The cover shell is located above the conveying belt, a plurality of ceramic tubes are horizontally arranged on the lower portion of the cover shell side by side, and discharge electrodes are arranged on the side walls of the ceramic tubes. The utility model provides novel equipment for improving the surface wettability of the tin-plated plate, and is beneficial to reducing the energy consumption and improving the product quality.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology, and in particular to an apparatus for improving the wettability of tin-plated sheet surfaces. Background Technology

[0002] Tinplate, due to its suitable strength, excellent weldability and stamping properties, and its surface coating offering good corrosion resistance and a glossy appearance, is widely used in the food industry, electrical appliances, instruments, toys, chemicals, and decoration. Before being used in food packaging, tinplate requires coatings of various properties on both its inner and outer surfaces. After curing, these coatings form an organic film on the surface, providing corrosion protection on the inner surface and decoration on the outer surface. During the coating process, the quality of the organic coating film on the tinplate surface is related to the wettability of both the tinplate and the coating. When the wettability of the tinplate and the coating is mismatched, pinhole defects will appear in the resulting coating.

[0003] Currently, most tinplate production uses sodium dichromate electrolytic passivation (311 passivation). This passivation method produces a composite passivation film composed of Cr2O3 and Cr(OH)3 on the surface of the tinplate, followed by the application of anti-rust oil. However, this method results in unstable surface wettability of the tinplate, with dyne values ​​generally below 32 mN / m.

[0004] Tinplate coating manufacturers typically bake the tinplate before coating. The specific method is to bake the tinplate in an oven at a temperature of about 160 ℃ for 15 to 30 minutes. This can stably increase the dyne value of the tinplate surface to above 32 mN / m, but it is energy-intensive and takes a long time. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses an apparatus for improving the wettability of tin-plated sheet surfaces, comprising a housing shaped like a "⊥", a conveyor belt horizontally mounted on the lower part of the housing, the conveyor belt being conductive and grounded, the tin-plated sheet being placed on the conveyor belt and transported into the interior of the housing.

[0006] A discharge unit is provided at the upper part of the housing. The discharge unit includes a cover located above the conveyor belt. Several ceramic tubes are arranged horizontally side by side at the lower part of the cover, and discharge electrodes are provided on the side walls of the ceramic tubes. When the tin-plated plate passes under the ceramic tubes, the discharge electrodes operate, discharging the surface of the tin-plated plate to convert the passivation layer of the tin-plated plate into Cr2O3. This increases the polarity of the passivation layer and enhances its polar adsorption capacity for coatings, thereby improving wettability.

[0007] Preferably, the conveyor belt has an internal support plate that supports the upper section of the conveyor belt. An L-shaped connector is fixedly connected to the edge of the support plate, and the other side of the L-shaped connector is fixedly connected to the inner wall of the housing. The support plate holds the conveyor belt in place, ensuring that the tin-plated plates on the conveyor belt are conveyed horizontally. That is, during conveying, the distance between the tin-plated plates and the ceramic tube remains consistent. A grounding cable is also present on the support plate.

[0008] Preferably, an electrode post is fixedly connected to the end of the ceramic tube, and the electrode post is electrically connected to the discharge electrode. A copper busbar is sleeved and fixedly disposed on the electrode post. The copper busbar facilitates the connection of the discharge cable.

[0009] Preferably, a second electric cylinder is disposed inside the housing, and a fixing plate is fixedly connected to the output end extending from the lower end of the second electric cylinder. The fixing plate is fixedly connected to the side wall of the housing. Activating the second electric cylinder is used to change the height of the discharge unit, thereby controlling the distance between the ceramic tube and the tin-plated plate.

[0010] Preferably, a tensioning roller is provided inside the housing, and the tensioning roller supports the conveyor belt upward. A first electric cylinder is provided at both ends of the tensioning roller, and the output end of the first electric cylinder cooperates with the end of the tensioning roller. The tensioning roller is used to apply tension to the conveyor belt. Furthermore, a pressure sensor is provided between the output end of the first electric cylinder and the tensioning roller, and the measured pressure provides feedback to control the first electric cylinder. Finally, a grounding cable is connected to the tensioning roller.

[0011] Preferably, a drive motor is fixedly connected inside the housing, a first pulley is fixedly connected to the output end of the drive motor, and a second pulley is fixedly connected to the end of the conveyor roller at one end of the conveyor belt. A belt is fitted onto both the first and second pulleys. Starting the drive motor enables the conveyor belt to run via the first pulley, belt, and second pulley.

[0012] Preferably, an exhaust pipe is fixedly connected to the upper middle part of the housing, and a fan is fixedly connected inside the exhaust pipe. During the discharge process, gases such as ozone are generated, so a fan and an exhaust pipe are provided to remove them.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. The method of obtaining tin-plated plates through discharge treatment has lower energy consumption and shorter processing time compared to baking the tin-plated plates before coating.

[0015] 2. A support plate is provided to ensure that the distance between the tin-plated plate and the discharge unit is consistent during the conveying process. At the same time, the height of the discharge unit can be controlled by a second electric cylinder to meet the production needs of different processes.

[0016] 3. Equipped with a fan and exhaust pipe, it can remove the heat and gas generated by the discharge, ensuring stable production. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a three-dimensional schematic diagram of the discharge unit of the present invention;

[0020] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 5 for Figure 2 Enlarged view of point B in the middle;

[0022] Figure 6 for Figure 3 A magnified view of point C in the middle.

[0023] List of reference numerals in the attached diagram:

[0024] 1. Housing; 2. Exhaust duct; 3. Fan; 4. Conveyor belt; 5. Support plate; 6. First electric cylinder; 7. Discharge unit; 8. Second electric cylinder; 9. Fixing plate; 10. First pulley; 11. Belt; 12. Second pulley; 13. Drive motor; 14. L-shaped connector; 15. Tensioning roller;

[0025] 71. Housing; 72. Ceramic tube; 73. Copper busbar; 74. Electrode post. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0027] like Figures 1 to 6 As shown, an apparatus for improving the wettability of tin-plated sheet surface includes a housing 1, and the housing 1 is shaped like a "⊥". A conveyor belt 4 is horizontally mounted on the lower part of the housing 1. The conveyor belt 4 is used to transport galvanized sheet. The conveyor belt 4 is conductive and grounded.

[0028] The upper part of the housing 1 is provided with a discharge unit 7. The discharge unit 7 includes a cover 71. The lower end of the cover 71 is open and the upper end face is provided with a through hole. The cover 71 is located above the conveyor belt 4. Several ceramic tubes 72 are arranged horizontally side by side at the lower part of the cover 71. The side wall of the ceramic tubes 72 is provided with discharge electrodes. When the tin-plated plate passes under the ceramic tubes 72, the discharge electrodes work. Combined with the grounded conveyor belt 4, the arc electrode is on the surface of the tin-plated plate, thereby changing the physical and chemical properties of the tin-plated plate surface and improving the surface wettability.

[0029] The conveyor belt 4 is equipped with a support plate 5, which is a rectangular plate. The support plate 5 supports the upper section of the conveyor belt 4. Under the action of the support plate 5, the tin-plated plate transported on the conveyor belt 4 is kept horizontal, that is, the gap between the tin-plated plate and the discharge unit 7 does not change, ensuring the consistency of surface treatment. At the same time, the support plate 5 is also grounded. The edge of the support plate 5 is fixedly connected to an L-shaped connector 14, and the other side of the L-shaped connector 14 is fixedly connected to the inner wall of the housing 1. The L-shaped connector 14 is used to support and fix the support plate 5.

[0030] An electrode post 74 is fixedly connected to the end of the ceramic tube 72, and the electrode post 74 is electrically connected to the discharge electrode. A copper busbar 73 is fixedly sleeved on the electrode post 74. The copper busbar 73 facilitates the electrical connection of all ceramic tubes 72 and is conducive to the connection of the discharge cable.

[0031] The housing 1 is equipped with a second electric cylinder 8. The output end of the second electric cylinder 8 is fixedly connected to a fixing plate 9. The fixing plate 9 is fixedly connected to the side wall of the cover 71. When the second electric cylinder 8 is activated, the height of the discharge unit 7 is changed, thereby controlling the spacing between the discharge unit 7 and the tin plating plate to meet the adjustment requirements of different production processes.

[0032] The housing 1 is equipped with a tension roller 15, which supports the conveyor belt 4 upwards. Both ends of the tension roller 15 are equipped with a first electric cylinder 6, and the output end of the first electric cylinder 6 is engaged with the end of the tension roller 15. Furthermore, a pressure sensor is provided between the output end of the first electric cylinder 6 and the end of the tension roller 15, and the tension of the conveyor roller 4 is indirectly obtained through the pressure sensor. The tension roller 15 is also grounded.

[0033] A drive motor 13 is fixedly connected inside the housing 1. A first pulley 10 is fixedly connected to the output end of the drive motor 13. A second pulley 12 is fixedly connected to the end of the conveyor roller at one end of the conveyor belt 4. A belt 11 is sleeved on the first pulley 10 and the second pulley 12. When the drive motor 13 is started, the transmission belt 4 is driven by the first pulley 10, the belt 11, and the second pulley 12.

[0034] An exhaust pipe 2 is fixedly connected to the upper middle part of the housing 1, and a fan 3 is fixedly connected inside the exhaust pipe 2. When the fan 3 is working, it performs air extraction from the inside of the housing 1. During the discharge process, heat and ozone are generated by ionization, hence the need for air extraction.

[0035] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. An apparatus for improving the wettability of tin-plated sheet surface, characterized in that, Includes a housing (1), and the housing (1) is "⊥", and a conveyor belt (4) is horizontally mounted on the lower part of the housing (1), the conveyor belt (4) is conductive and grounded; The upper part of the housing (1) is provided with a discharge unit (7), the discharge unit (7) includes a cover (71), and the cover (71) is located above the conveyor belt (4). Several ceramic tubes (72) are arranged horizontally side by side at the lower part of the cover (71), and discharge electrodes are provided on the side wall of the ceramic tubes (72).

2. The equipment for improving the surface wettability of tin-plated sheets according to claim 1, characterized in that: The conveyor belt (4) is provided with a support plate (5) inside, and the support plate (5) supports the upper section of the conveyor belt (4). The edge of the support plate (5) is fixedly connected to an L-shaped connector (14), and the other side of the L-shaped connector (14) is fixedly connected to the inner wall of the housing (1).

3. The equipment for improving the wettability of tin-plated sheet surface according to claim 1, characterized in that: An electrode post (74) is fixedly connected to the end of the ceramic tube (72), and the electrode post (74) is electrically connected to the discharge electrode. A copper busbar (73) is fixedly sleeved on the electrode post (74).

4. The equipment for improving the wettability of tin-plated sheet surface according to claim 1, characterized in that: The housing (1) is provided with a second electric cylinder (8) inside. The output end of the second electric cylinder (8) is fixedly connected to a fixing plate (9). The fixing plate (9) is fixedly connected to the side wall of the cover (71).

5. The equipment for improving the wettability of tin-plated sheet surface according to claim 1, characterized in that: The housing (1) is provided with a tension roller (15) inside, and the tension roller (15) supports the conveyor belt (4) upward. Both ends of the tension roller (15) are provided with a first electric cylinder (6), and the output end of the first electric cylinder (6) cooperates with the end of the tension roller (15).

6. The equipment for improving the wettability of tin-plated sheet surface according to claim 1, characterized in that: A drive motor (13) is fixedly connected inside the housing (1). A first pulley (10) is fixedly connected to the output end of the drive motor (13). A second pulley (12) is fixedly connected to the end of the conveyor roller at one end of the conveyor belt (4). A belt (11) is sleeved on the first pulley (10) and the second pulley (12).

7. The equipment for improving the wettability of tin-plated sheet surface according to claim 1, characterized in that: An exhaust pipe (2) is fixedly connected to the middle of the upper end of the housing (1), and a fan (3) is fixedly connected inside the exhaust pipe (2).

Images