Aluminum coil coating device

Abstract

The utility model provides an aluminum coil coating device which comprises an upper coating roller, a steering roller and a lower coating roller, the upper coating roller and the steering roller are arranged on the upstream of the advancing direction of an aluminum coil and used for coating the upper surface of the aluminum coil, the lower coating roller is arranged on the downstream of the advancing direction of the aluminum coil and used for coating the lower surface of the aluminum coil, and the lower coating roller can be adjusted in the height direction. A pressing wheel assembly and a carrier roller assembly are arranged between the upper coating roller and the lower coating roller; pressing wheels in the pressing wheel assembly act on the wave positions of the two sides of the aluminum coil and press the aluminum coil downwards to make close contact with the lower coating roller, it is guaranteed that the two sides of the aluminum coil can be evenly coated with paint, and the problem of edge wave coating missing is solved. And a carrier roller is arranged in the carrier roller assembly, so that the aluminum coil can be supported, the aluminum coil can be fully flattened under the action of tension stretching, the aluminum coil can be in full contact with paint on a coating roller, and the phenomenon of missing coating of waves in the middle is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of coating devices, and more specifically, to an aluminum coil coating device. Background Art

[0002] In the coil coating production line, as a key raw material, the surface quality of the aluminum plate directly affects the coating effect and quality of the final product. However, due to the instability of the upstream processes, the aluminum plate often shows wave phenomena in the middle or on both sides. During the coating process, especially during the reverse coating, these waves will cause the polyurethane coating roller not to fit tightly with the aluminum strip, leading to the serious defect of paint leakage.

[0003] Currently, the existing precision coating machines usually adopt a structure similar to the aluminum coil passivation equipment disclosed in the patent application with the application number CN202310179863.9. This structure can better handle the above-mentioned paint leakage problem during the front coating due to the support of the backrest turning roller. However, during the reverse coating, since the polyurethane roller is located below the traveling direction of the aluminum plate and only relies on the self-weight of the aluminum strip to press down on the coating roller, it cannot effectively handle the wave problem of the aluminum plate, resulting in frequent paint leakage, which seriously affects the production efficiency and product quality. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide an aluminum coil coating device to solve the above problems.

[0005] The present utility model adopts the following solutions:

[0006] The present application provides an aluminum coil coating device, including an upper coating roller and a turning roller arranged upstream in the traveling direction of the aluminum coil for coating the upper surface of the aluminum coil, and a lower coating roller arranged downstream for coating the lower surface of the aluminum coil, and the lower coating roller can be adjusted in the height direction;

[0007] A pressure wheel assembly and a supporting roller assembly are arranged between the upper coating roller and the lower coating roller; the pressure wheel assembly includes two rotatable pressure wheels, which are configured on both sides of the traveling direction of the aluminum coil to apply pressure to the upper edges of both sides of the aluminum coil; the supporting roller assembly includes a supporting roller supported on the lower surface of the aluminum coil, which can be moved and adjusted in the vertical direction and can rotate.

[0008] Further, the upper end of the lower coating roller is higher than the upper end of the turning roller, so that the traveling route of the aluminum coil between the upper coating roller and the lower coating roller is from low to high.

[0009] Further, the pressure roller assembly further includes a pressure rod rotatably disposed on the bracket and having an adjustable height of the rotation axis, one end of the pressure rod is rotatably connected to the pressure roller; the other end of the pressure rod is provided with a pressing member to apply pressure to both sides of the aluminum coil through the lever action of the pressure rod.

[0010] Further, the height of the axis of rotation of the pressure rod is lower than the height of the aluminum coil where the pressure is applied by the pressure roller.

[0011] Further, the pressing member is a spring; one end of the spring is connected to the other end of the pressure rod, and the other end of the spring is connected to a pressure adjusting member for adjusting the elastic force of the spring on the pressure rod.

[0012] Further, the pressure adjusting member is a bolt screwed to a support rod; the support rod is fixed on the bracket and is placed above the pressure rod.

[0013] Further, the pressure roller is conical or frustum-shaped so that only one point of the pressure roller touches the upper edge of the aluminum coil.

[0014] Further, the outer surface of the pressure roller is electroplated with a layer of hard chromium.

[0015] Further, the idler roller assembly is arranged downstream of the pressure roller assembly and includes a guide rail arranged on the bracket and a lifter for driving the idler roller to move up and down along the guide rail.

[0016] Further, both the upper coating roller and the lower coating roller are in rolling contact with the strip roller.

[0017] By adopting the above technical solutions, the following technical effects can be achieved by the present utility model:

[0018] The present utility model provides an aluminum coil coating device, in which a pressure roller assembly and an idler roller assembly are arranged between the upper coating roller and the lower coating roller; the pressure roller in the pressure roller assembly acts on the wave parts on both sides of the aluminum coil, pressing it down to be in close contact with the lower coating roller, ensuring that the paint can be evenly coated on both sides of the aluminum coil and eliminating the problem of missed coating at the edge waves; while the idler roller in the idler roller assembly can lift the aluminum coil to fully flatten the aluminum coil under the action of tension stretching, so that the aluminum coil can fully contact the paint on the coating roller, thereby eliminating the missed coating phenomenon of the middle wave. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of an aluminum coil coating device according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of a pressure roller assembly of an aluminum coil coating device according to an embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of one of the pressure roller assemblies of an aluminum coil coating device according to an embodiment of the present utility model;

[0023] Figure 4 is a schematic structural diagram of a supporting roller assembly of an aluminum coil coating device according to an embodiment of the present utility model;

[0024] Figure 5 is a partial schematic structural diagram of a supporting roller assembly of an aluminum coil coating device according to an embodiment of the present utility model;

[0025] Reference numerals: upper coating roller 1, turning roller 2, lower coating roller 3, pressure roller assembly 4, supporting roller assembly 5, aluminum coil 6, pressure roller 7, pressure rod 8, fixing plate 9, waist-shaped groove 10, spring 11, pressure adjusting member 12, guide rail 13, fixing member 14, supporting roller 15, elevator 16, transmission rod 17, strip feeding roller 18, coupling 19. Specific Embodiments

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] Embodiment

[0028] Combined Figures 1 to 5 As shown, this embodiment provides an aluminum coil coating device, which includes an upper coating roller 1 and a turning roller 2 arranged upstream of the traveling direction of the aluminum coil 6 for coating the upper surface of the aluminum coil 6, and a lower coating roller 3 arranged downstream for coating the lower surface of the aluminum coil 6. The lower coating roller 3 can be adjusted in the height direction;

[0029] A pressure wheel assembly 4 and a supporting roller assembly 5 are arranged between the upper coating roller 1 and the lower coating roller 3; the pressure wheel assembly 4 includes two rotatable pressure wheels 7, which are configured on both sides of the traveling direction of the aluminum coil 6 to apply pressure to the upper edges of both sides of the aluminum coil 6; the supporting roller assembly 5 includes a supporting roller 15 supported on the lower surface of the aluminum coil 6, which can be adjusted to move vertically and can rotate.

[0030] A pressure wheel assembly 4 and a supporting roller assembly 5 are arranged between the upper coating roller 1 and the lower coating roller 3; the pressure wheels 7 in the pressure wheel assembly 4 act on the wave parts on both sides of the aluminum coil 6, pressing them down to be in close contact with the lower coating roller 3 to ensure that the paint can be evenly coated on both sides of the aluminum coil 6 and eliminate the problem of missed coating at the edge waves; the setting of the supporting roller 15 in the supporting roller assembly 5 can lift the aluminum coil 6 so that the aluminum coil 6 can be fully flattened under the action of tension stretching, enabling the aluminum coil 6 to fully contact the paint on the coating roller, thereby eliminating the problem of missed coating in the middle waves.

[0031] In this embodiment, as Figure 2 and Figure 3 shown, the pressure wheel assembly 4 further includes a pressure rod 8 rotatably arranged on the bracket and the height of the rotation axis can be adjusted. One end of the pressure rod 8 is rotatably connected to the pressure wheel 7 through a bearing; the other end of the pressure rod 8 is configured with a pressing member to apply pressure to both sides of the aluminum coil 6 through the action of a lever. Specifically, the pressure rod 8 is rotatably arranged on the fixing plate 9; a waist-shaped groove 10 is arranged on the fixing plate 9 and is fixed to the bracket through bolts. Through the setting of the waist-shaped groove 10, the height can be adjusted in the vertical direction, thereby adjusting the height of the pressure rod 8. The pressing member is a spring 11; one end of the spring 11 is connected to the other end of the pressure rod 8, and the other end of the spring 11 is connected with a pressure adjusting member 12 for adjusting the elastic force of the spring 11 on the pressure rod 8. The pressure adjusting member 12 is a bolt, which is screwed on the support rod; the support rod is fixed on the bracket and is placed above the pressure rod 8. When the edge waves of the aluminum coil 6 are severe, the bolt is adjusted to rotate upward as a whole. At this time, the spring 11 is stretched, and the tensile force of the spring 11 on the pressure rod 8 increases. The downward force of the pressure wheel 7 is increased through the rotation of the rotating shaft to press down the waves on both sides of the aluminum coil 6 to be in close contact with the lower coating roller 3 to ensure that the paint can be evenly coated on both sides of the aluminum coil 6 and eliminate the problem of missed coating at the edge waves.

[0032] Preferably, the axis height of the rotation of the pressure rod 8 is lower than the height of the aluminum coil 6 at the position where the pressure is applied by the pressure wheel 7. So as to form a certain inclination angle between the pressure rod 8 and the aluminum coil 6, and further enable the pressure wheel 7 to contact only one point on the edge of the aluminum plate, that is, it does not damage the unpainted and uncured paint on the upper surface of the aluminum plate, and can also make the pressure wheel 7 press down the aluminum plate tightly against the polyurethane coating roller below. Further, the pressure wheel 7 is conical or frustum-shaped to ensure that only one point of the pressure wheel 7 presses on the upper edge of the aluminum coil 6. The outer surface of the pressure wheel 7 is electroplated with a layer of hard chromium, which is beneficial to wear resistance during single-point contact.

[0033] In this embodiment, as Figure 4 and Figure 5 shown, the roller support assembly 5 arranged downstream of the pressure wheel assembly 4 includes two guide rails 13 arranged on the bracket on both sides of the width of the aluminum coil 6, a fixing member 14 movably arranged on the guide rails 13, a roller 15 rotatably arranged on the fixing member 14 through a rotating shaft, and two elevators 16 fixed on the bracket for driving the roller 15 to move up and down along the guide rails 13. Both of the two elevators 16 are provided with couplings 19, and the two couplings 19 are connected by a transmission rod 17 to realize synchronous lifting of both ends of the roller 15. The roller 15 can lift the aluminum coil 6 to fully flatten the aluminum coil 6 under the action of tension stretching, so that the aluminum coil 6 can fully contact the paint on the coating roller, thereby eliminating the phenomenon of missed coating in the middle wave.

[0034] In this embodiment, the upper end of the lower coating roller 3 is higher than the upper end of the turning roller 2, so that the traveling route of the aluminum coil 6 between the upper coating roller 1 and the lower coating roller 3 travels from low to high. When the middle wave of the aluminum coil 6 is relatively serious, the heights of the roller 15 and the lower coating roller 3 can be adjusted to increase the downward pressure of the aluminum strip, and the effect of middle wave extension is better, making the painting more uniform.

[0035] There is usually a certain distance between the turning roller 2 and the lower coating roller 3. If the aluminum coil 6 has side waves or middle waves, it will cause missed coating on the side or middle part of the aluminum coil 6 after passing through the lower coating roller 3. After adding the pressure wheel assembly 4 and the roller support assembly 5, the aluminum coil 6 can be fully flattened under the action of downward pressure and tension stretching. Before the flattened aluminum coil 6 returns to its original wavy shape during the traveling process, it has been evenly painted.

[0036] It should be noted that the upper coating roller 1 and the lower coating roller 3 are arranged in a similar way to the coating roller structure in the aluminum coil 6 passivation equipment disclosed in the patent application No. CN202310179863.9. Both are provided with two material carrying rollers 18, which lift the coating in the coating tray and transfer it to the upper coating roller 1 and the lower coating roller 3. At the same time, the material carrying roller 18 approaches or moves away from the upper coating roller 1 and the lower coating roller 3 through a driving device.

[0037] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "plural" is two or more unless otherwise specifically defined.

[0040] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly stipulated and defined, the first feature being “above” or “below” the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being “above”, “over” and “on the top of” the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being “under”, “beneath” and “underneath” the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. An aluminum coil coating device, comprising an upper coating roller and a turning roller arranged upstream in the advancing direction of the aluminum coil for coating the upper surface of the aluminum coil, and a lower coating roller arranged downstream for coating the lower surface of the aluminum coil. The lower coating roller can be adjusted in the height direction. It is characterized in that: A pressing wheel assembly and a supporting roller assembly are sequentially arranged between the upper coating roller and the lower coating roller; the pressing wheel assembly includes two rotatable pressing wheels, which are configured on both sides of the advancing direction of the aluminum coil to apply pressure to the upper edges of both sides of the aluminum coil; the supporting roller assembly includes a supporting roller supported on the lower surface of the aluminum coil, which can be adjusted in the vertical direction and is rotatable.

2. The aluminum coil coating device according to claim 1, wherein The upper end of the lower coating roller is higher than the upper end of the turning roller, so that the advancing route of the aluminum coil between the upper coating roller and the lower coating roller advances from low to high.

3. The aluminum coil coating device according to claim 1, characterized in that, The pressing wheel assembly further includes a pressure rod rotatably arranged on the bracket and the height of the rotation axis can be adjusted. One end of the pressure rod is rotatably connected with the pressing wheel; a pressing member is arranged at the other end of the pressure rod to apply pressure to the upper edges of both sides of the aluminum coil through the action of a lever.

4. The aluminum coil coating device according to claim 3, characterized in that, The height of the axis of rotation of the pressure rod is lower than the height of the aluminum coil at the position where the pressure is applied by the pressing wheel.

5. The aluminum coil coating device according to claim 3, characterized in that, The pressing member is a spring; one end of the spring is connected to the other end of the pressure rod, and the other end of the spring is connected with a pressure adjusting member for adjusting the elastic force of the spring on the pressure rod.

6. The aluminum coil coating device according to claim 5, wherein, The pressure adjusting member is a bolt, which is screwed on the support rod; the support rod is fixed on the bracket and is placed above the pressure rod.

7. The aluminum coil coating device according to any one of claims 1-6, characterized in that, The pressing wheel is conical or frustum-shaped, so that only one point of the pressing wheel touches the upper edge of the aluminum coil.

8. The aluminum coil coating device according to claim 7, characterized in that, The outer surface of the pressing wheel is electroplated with a layer of hard chromium.

9. The aluminum coil coating device according to claim 1, characterized in that, The supporting roller assembly is arranged downstream of the pressing wheel assembly, and includes a guide rail arranged on the bracket and a lift for driving the supporting roller to move up and down along the guide rail.

10. The aluminum coil coating device according to claim 1, characterized in that, Both the upper coating roller and the lower coating roller are in rolling contact with the strip roller.

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