Plate film laminating equipment

Abstract

The utility model relates to the technical field of plate film coating processing, in particular to plate film coating equipment capable of preventing film surface corona treatment effects from being inconsistent, which comprises a corona generating device, the corona generation device comprises a corona support, a corona roller rotationally arranged on the corona support and a plurality of discharge teeth which are arranged on one side of the corona roller, the extension direction of the discharge teeth is parallel to the axis of the corona roller, and the discharge teeth are uniformly distributed in the circumferential direction of the corona roller; a discharge gap is formed between the discharge end surface of each discharge tooth and the surface of the corona roller, and the discharge gap is used for a film to pass through; the corona roller has the beneficial effects that the discharge teeth are uniformly distributed in the circumferential direction of the corona roller, so that the corona treatment effect received by a film when the film passes through a discharge gap is consistent, insufficient or excessive local treatment is avoided, the bonding uniformity after film coating is further improved, and the problems of local delamination or bubbles and the like of a plate are avoided.

Description

Technical Field

[0001] This utility model relates to the field of sheet coating technology, and in particular to a sheet coating equipment that prevents inconsistent corona treatment effects on the film surface. Background Technology

[0002] In the field of sheet coating, corona treatment is a commonly used surface modification technique to increase the surface energy of the film and enhance its adhesion strength to the substrate (such as wood, metal, and plastic sheets). Traditional corona treatment equipment typically includes a corona roller and a discharge electrode. When the film passes between the corona roller and the discharge electrode, the high-voltage discharge causes oxidation on the film surface, forming polar groups, thereby improving its wettability and adhesion.

[0003] However, existing corona treatment devices still have the following technical problems in practical applications: the discharge electrodes (such as discharge rods or discharge wires) of traditional devices are usually arranged in a fixed manner, and the discharge points are unevenly distributed, resulting in inconsistent corona treatment effects on the film surface. Some areas may be undertreated, affecting the bonding quality after coating, and even causing problems such as local delamination or bubbles. Utility Model Content

[0004] The purpose of this invention is to provide a sheet coating equipment that ensures consistent corona treatment results.

[0005] This utility model is achieved through the following technical solution.

[0006] A sheet metal coating device includes a corona generator, which includes a corona support, a corona roller rotatably mounted on the corona support, and a plurality of discharge teeth disposed on one side of the corona roller and extending in a direction parallel to the axis of the corona roller. The discharge teeth are evenly arranged circumferentially along the corona roller, and a discharge gap is formed between the discharge end face of each discharge tooth and the surface of the corona roller, the discharge gap being for the film to pass through.

[0007] As a further improvement of this utility model, the corona generating device further includes a discharge electrode, on which a mounting base is provided, and the mounting base has several mounting grooves through which one end of the discharge tooth passes along the axis of the corona roller.

[0008] As a further improvement of this utility model, the corona generator further includes a mounting housing, the discharge electrode is disposed inside the mounting housing, a driving device is disposed on the corona bracket, the output end of the driving device is hinged to one end of the mounting housing, and the other end of the mounting housing is hinged to the lower end of the corona bracket.

[0009] As a further improvement of this utility model, a first slide bar is inclinedly arranged on the side of the corona support away from the corona generating device, a first slider is slidably arranged on the first slide bar, and a tension roller with an extension direction parallel to the axis of the corona roller is rotatably arranged on the first slider.

[0010] As a further improvement of this utility model, a first counterweight is provided on the first slider.

[0011] As a further improvement of this utility model, the corona support is provided with an observation window parallel to the extension direction of the first slide bar.

[0012] As a further improvement of this utility model, a thin film support is provided on one side of the corona generator, and the thin film support is used to place the thin film roll.

[0013] As a further improvement of this utility model, the corona support is provided with an inlet roller and an outlet roller whose extension direction is parallel to the axis of the corona roller.

[0014] As a further improvement of this utility model, a guide bracket is provided on the lower side of the corona generator, a second slide rod is inclinedly provided on the guide bracket, a second slider is slidably provided on the second slide rod, and a guide roller with an extension direction parallel to the axis of the corona roller is rotatably provided on the second slider.

[0015] As a further improvement of this utility model, a second counterweight is provided on the second slider.

[0016] The beneficial effects of this utility model are:

[0017] 1. The discharge teeth are evenly distributed around the corona roller to ensure that the film receives consistent corona treatment when passing through the discharge gap, avoiding insufficient or excessive treatment in some areas, thereby improving the adhesion uniformity after coating and preventing problems such as local delamination or bubbles in the board.

[0018] 2. Each mounting slot allows the discharge teeth to slide into the corona roller along the axis of the corona roller, ensuring that the installation position of the discharge teeth is parallel to the corona roller, avoiding uneven discharge gaps due to angular deviations, and thus ensuring the uniformity of corona treatment. In addition, since the mounting slots allow the discharge teeth to be inserted or withdrawn along the axis of the corona roller, there is no need to disassemble components such as discharge electrodes and mounting bases, simplifying the replacement or cleaning process of individual discharge teeth and reducing maintenance costs.

[0019] 3. By installing the housing, operators are prevented from directly contacting the discharge electrodes inside the housing, and dust, moisture and other contaminants are prevented from entering and affecting the discharge stability. At the same time, by controlling the drive device to extend and retract, the housing is rotated around the hinge point where it is hinged to the corona bracket, which in turn causes the housing to move the discharge electrodes, the mounting base and the discharge teeth, thus facilitating batch replacement of discharge teeth or cleaning and maintenance.

[0020] 4. When the film conveying speed fluctuates or the material elasticity changes, the tension roller automatically slides up and down under the action of gravity, instantly compensating for the tension and ensuring that the film always fits flat against the surface of the corona roller, preventing air bubbles or missed treatment in the corona treatment area. Attached Figure Description

[0021] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model patent;

[0023] Figure 2 This is a schematic diagram of the corona generator structure in an embodiment of this utility model patent.

[0024] Figure 3 This is a schematic diagram of the internal structure of the corona generator in the embodiments of this utility model patent;

[0025] Figure 4 Corresponding to the embodiments of this utility model patent Figure 3 Enlarged view of a portion of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the mounting base structure in an embodiment of this utility model patent.

[0027] The following are the labels in the diagram: 1. Film support; 2. Film roll; 3. Corona support; 4. Corona roller; 5. Discharge gap; 6. Discharge electrode; 7. Mounting seat; 8. Discharge tooth; 9. Mounting groove; 10. Mounting housing; 11. Telescopic cylinder; 12. Inlet roller; 13. Outlet roller; 14. First slide bar; 15. First slider; 16. Tensioning roller; 17. Observation window; 18. Guide support; 19. Second slide bar; 20. Second slider; 21. Belt conveyor assembly. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to Figures 1 to 5 The present utility model embodiment discloses that:

[0032] A sheet metal coating equipment includes a sheet metal conveying device for conveying sheet metal. The sheet metal conveying device includes a frame and a belt conveyor assembly 21 mounted on the frame. The belt conveyor assembly 21 is a general standard part or a component known to those skilled in the art. Its structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods, and will not be described here. A corona generator is mounted on the frame, and a film support 1 is mounted on one side of the corona generator. The film support 1 is used to hold a film roll 2. In this embodiment, the sheet metal conveying device is used to convey sheet metal. During the conveying process, the film is pulled out from the film support 1, passes through the corona generator to achieve corona treatment, and is then pulled to the surface of the sheet metal from the corona generator. At this time, the film is then attached to the sheet metal, and finally conveyed to the next process device by the sheet metal conveying device.

[0033] In this embodiment, the corona generator includes a corona support 3, a corona roller 4 rotatably mounted on the corona support 3, and a plurality of discharge teeth 8 disposed on one side of the corona roller 4 and extending in a direction parallel to the axis of the corona roller 4. Each discharge tooth 8 is evenly distributed around the circumference of the corona roller 4, and a discharge gap 5 is formed between the discharge end face of each discharge tooth 8 and the surface of the corona roller 4, the discharge gap 5 allowing the film to pass through. A rotating motor is disposed on one side of the corona support 3, and the rotating motor drives the corona roller 4 to rotate. The film is pulled onto the corona roller 4 from the film support 1 and passes through the discharge gap 5. At this time, the discharge teeth 8 discharge, thereby achieving corona treatment of the film. Since the discharge teeth 8 are evenly distributed around the circumference of the corona roller 4, it ensures that the corona treatment effect received by the film when passing through the discharge gap 5 is consistent, avoiding insufficient or excessive local treatment, thereby improving the adhesion uniformity after lamination.

[0034] The corona generator also includes a discharge electrode 6, on which a mounting base 7 is provided. The mounting base 7 has several mounting grooves 9 through which one end of the discharge tooth 8 can pass along the axial direction of the corona roller 4. Each mounting groove 9 allows the discharge tooth 8 to slide into the groove along the axial direction of the corona roller 4, ensuring that the installation position of the discharge tooth 8 is parallel to the corona roller 4, avoiding uneven discharge gap 5 due to angular deviation, and thus ensuring the uniformity of corona treatment. In addition, since the mounting grooves 9 allow the discharge tooth 8 to be inserted or withdrawn along the axial direction of the corona roller 4, there is no need to disassemble the discharge electrode 6, mounting base 7, and other components, simplifying the replacement or cleaning process of a single discharge tooth 8 and reducing maintenance costs.

[0035] The corona generator also includes a mounting housing 10, with the discharge electrode 6 disposed inside the mounting housing 10. A driving device, a telescopic cylinder 11, is mounted on the corona bracket 3. The output end of the driving device is hinged to one end of the mounting housing 10, and the other end of the mounting housing 10 is hinged to the lower end of the corona bracket 3. The end of the telescopic cylinder 11 is also hinged to the corona bracket 3. The mounting housing 10 prevents operators from directly contacting the discharge electrode 6 inside, and also prevents dust, moisture, and other contaminants from entering and affecting discharge stability. Simultaneously, by controlling the telescopic cylinder 11 to extend and retract, the mounting housing 10 rotates around its hinge point to the corona bracket 3, thereby causing the mounting housing 10 to move and rotate, exposing the discharge electrode 6, the mounting base 7, and the discharge teeth 8, facilitating batch replacement of the discharge teeth 8 or cleaning and maintenance.

[0036] In this embodiment, the corona support 3 is provided with an inlet roller 12 and an outlet roller 13 whose extension direction is parallel to the axis of the corona roller 4; a first slide rod 14 is inclinedly provided on the side of the corona support 3 away from the corona generating device, a first slider 15 is slidably provided on the first slide rod 14, and a tension roller 16 whose extension direction is parallel to the axis of the corona roller 4 is rotatably provided on the first slider 15; during operation, the film is first introduced from the film support 1 to the inlet roller 12, then guided to the tension roller 16, then guided to the corona roller 4, and finally guided to the corona roller 4. The film is discharged through the discharge roller 13. The first slider 15 is slidably disposed on the first slide rod 14, while the tensioning roller 16 is rotatably disposed on the first slider 15. When the film conveying speed fluctuates or the elasticity of the material changes, the tensioning roller 16 automatically slides up and down under the action of gravity to compensate for the tension in real time, ensuring that the film is always flat and adheres to the surface of the corona roller 4, and preventing air bubbles or leakage in the corona treatment area. At the same time, in this embodiment, the tensioning is achieved by the natural downward hanging of the first slider 15 under gravity, eliminating the need for active tensioning devices such as motors and cylinders, reducing equipment complexity and manufacturing costs.

[0037] The first slider 15 is equipped with a first counterweight (not shown in the figure). By increasing or decreasing the weight of the first slider 15, it can flexibly adapt to the requirements of films of different materials and thicknesses (for example, lightweight PE film requires a smaller counterweight, while heavy PVC film requires a larger counterweight). The corona bracket 3 has an observation window 17 parallel to the extension direction of the first slider 14. The observation window 17 is used to observe the position of the first slider 15 sliding up and down and the film, so that the staff can identify whether the film is too loose or too tight, and then increase or decrease the weight of the first slider 15.

[0038] A guide bracket 18 is provided on the lower side of the corona generator. A second slide rod 19 is inclinedly provided on the guide bracket 18. A second slider 20 is slidably provided on the second slide rod 19. A guide roller (not shown in the figure) with an extension direction parallel to the axis of the corona roller 4 is rotatably provided on the second slider 20. The film is guided by the output roller 13 to the guide roller, and then guided by the guide roller to the top of the board and finally adsorbed onto the surface of the board, further optimizing the film coating accuracy. A second counterweight (not shown in the figure) is provided on the second slider 20. By increasing or decreasing the weight of the first slider 15, it can flexibly adapt to the needs of films with different materials and thicknesses.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sheet metal coating equipment, comprising a corona generator, characterized in that: The corona generator includes a corona support (3), a corona roller (4) rotatably mounted on the corona support (3), and a plurality of discharge teeth (8) disposed on one side of the corona roller (4) and extending in a direction parallel to the axis of the corona roller (4). Each discharge tooth (8) is evenly arranged around the circumference of the corona roller (4), and a discharge gap (5) is formed between the discharge end face of each discharge tooth (8) and the surface of the corona roller (4), the discharge gap (5) allowing the film to pass through.

2. The sheet metal coating equipment according to claim 1, characterized in that: The corona generator also includes a discharge electrode (6), on which a mounting base (7) is provided. The mounting base (7) has several mounting grooves (9) through which one end of the discharge tooth (8) passes along the axial direction of the corona roller (4).

3. The sheet metal coating equipment according to claim 2, characterized in that: The corona generator also includes a mounting housing (10), the discharge electrode (6) is disposed inside the mounting housing (10), a driving device is disposed on the corona bracket (3), the output end of the driving device is hinged to one end of the mounting housing (10), and the other end of the mounting housing (10) is hinged to the lower end of the corona bracket (3).

4. The sheet metal coating equipment according to claim 3, characterized in that: A first slide bar (14) is inclinedly arranged on the side away from the corona generating device on the corona support (3). A first slider (15) is slidably arranged on the first slide bar (14). A tension roller (16) with an extension direction parallel to the axis of the corona roller (4) is rotatably arranged on the first slider (15).

5. The sheet metal coating equipment according to claim 4, characterized in that: The first slider (15) is provided with a first counterweight.

6. The sheet metal coating equipment according to claim 4, characterized in that: The corona support (3) has an observation window (17) that is parallel to the extension direction of the first slide bar (14).

7. The sheet metal coating equipment according to claim 4, characterized in that: A film support (1) is provided on one side of the corona generator, and the film support (1) is used to place the film roll (2).

8. The sheet metal coating equipment according to claim 7, characterized in that: The corona support (3) is provided with an inlet roller (12) and an outlet roller (13) whose extension direction is parallel to the axis of the corona roller (4).

9. A sheet metal coating equipment according to claim 3, characterized in that: A guide bracket (18) is provided on the lower side of the corona generator. A second slide rod (19) is inclinedly provided on the guide bracket (18). A second slider (20) is slidably provided on the second slide rod (19). A guide roller with an extension direction parallel to the axis of the corona roller (4) is rotatably provided on the second slider (20).

10. A sheet metal coating equipment according to claim 9, characterized in that: The second slider (20) is provided with a second counterweight.

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