Coating machine and method for operating coating machine

Abstract

The invention relates to an operation method of a coating machine, which comprises the following steps of: before normal production and / or in a normal production process, stirring coating liquid in a coating liquid tank on line, and uniformly mixing the coating liquid; and applying the uniformly mixed coating liquid to the surface of a target object. In addition, the invention further relates to a coating machine which comprises a coating roller and a coating liquid tank, and an ultrasonic stirring mechanism is arranged in the coating liquid tank and used for stirring the coating liquid in the coating liquid tank. According to the invention, the coating liquid is uniformly mixed by stirring the coating liquid on line, so that the coating quality is prevented from being influenced by deposition of magnesium oxide in the coating liquid, a standby machine does not need to be frequently replaced, time and labor are saved, continuous production of a unit is facilitated, the production cost can be remarkably reduced, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical production, and in particular relates to a coating machine and an operating method of the coating machine. Background Art

[0002] Silicon steel has the characteristics of low hysteresis, low iron loss, high magnetic permeability, etc., and is widely used in power transformers and motors. The performance and service life of silicon steel are closely related to its surface state. Therefore, a protective coating needs to be applied to the surface when manufacturing silicon steel. Its functions include preventing silicon steel from oxidation, reducing eddy current losses, and improving insulation performance. Magnesium oxide coating is one of the common protective coatings. When used for silicon steel coating, magnesium oxide and water are usually mixed to form a suspension of magnesium oxide for coating.

[0003] However, magnesium oxide is difficult to dissolve in water and is prone to magnesium oxide deposition. Within two days of continuous unit operation, slurry deposition occurs in the tank and directly adheres to the coating roller surface, affecting the coating quality. Therefore, the coating machine needs to be frequently replaced with a spare machine, and the operator also needs to clean the deposits in time, which greatly increases production costs and labor intensity. A factory once abandoned the coating tank and replaced it with a spray pipe, but the coating quality declined. Summary of the invention

[0004] The present invention relates to a coating machine and an operating method of the coating machine, which can at least solve some defects of the prior art.

[0005] The present invention relates to an operating method of a coating machine, the operating method comprising:

[0006] Before and / or during normal production, the coating liquid in the coating tank is stirred online to mix the coating liquid;

[0007] Apply the mixed coating liquid to the surface of the target object.

[0008] As one of the implementation modes, stirring the coating liquid specifically includes:

[0009] Execute S1a M times and S1b N times until the coating liquid is mixed, M ≥ 1, N ≥ 1;

[0010] Wherein, S1a is: making the coating liquid generate a first vortex liquid flow in a first direction; S1b is: making the coating liquid generate a second vortex liquid flow in a second direction; one of the first direction and the second direction is a clockwise direction, and the other direction is a counterclockwise direction;

[0011] There is one S1b between every two adjacent S1a, and there is one S1b between every two adjacent S1a.

[0012] As one of the implementation modes, the first vortex liquid flow and the second vortex liquid flow are both achieved by ultrasonic stirring.

[0013] As one of the embodiments, the first vortex liquid flow is formed by a first ultrasonic generating unit, and the second vortex liquid flow is formed by a second ultrasonic generating unit;

[0014] The first ultrasonic generating unit includes four first ultrasonic vibration plates respectively arranged on the four side walls of the coating liquid tank, and the second ultrasonic generating unit includes four second ultrasonic vibration plates respectively arranged on the four side walls of the coating liquid tank, and the four first ultrasonic vibration plates and the four second ultrasonic vibration plates are cross-arranged along the circumference of the coating liquid tank.

[0015] As one of the implementation modes, the operation method further includes:

[0016] In S1a and S1b, the coating roller in the coating tank is also rotated to cause disturbance to the top of the first vortex liquid flow and the top of the second vortex liquid flow.

[0017] As one of the implementation modes, the operation method further includes:

[0018] In the interval between S1a and the next adjacent S1b, the rotation speed of the coating roller is increased to destroy the first vortex liquid flow or reduce the vortex intensity of the first vortex liquid flow;

[0019] During the interval between S1b and the next S1a, the rotation speed of the coating roller is increased to destroy the second vortex liquid flow or reduce the vortex intensity of the second vortex liquid flow.

[0020] As one of the implementation modes, the operation method further includes:

[0021] When the coating liquid needs to be discharged, the coating liquid is made to generate a vortex flow to accelerate the discharge of the coating liquid tank.

[0022] The present invention also relates to a coating machine, comprising a coating roller and a coating tank, wherein an ultrasonic stirring mechanism is arranged in the coating tank for stirring the coating liquid in the coating tank.

[0023] As one of the embodiments, the coating machine is also equipped with a controller, and the ultrasonic stirring mechanism is electrically connected to the controller. The controller is used to control the ultrasonic stirring mechanism to stir the coating liquid in the coating tank before and / or during normal production to mix the coating liquid.

[0024] As one of the implementation modes, the ultrasonic stirring mechanism comprises:

[0025] A first ultrasonic generating unit, used to generate a first vortex liquid flow in a first direction in the coating liquid; the first ultrasonic generating unit comprises four first ultrasonic vibration plates respectively arranged on four side walls of the coating liquid tank;

[0026] A second ultrasonic generating unit, used to make the coating liquid generate a second vortex liquid flow in a second direction; the second ultrasonic generating unit comprises four second ultrasonic vibration plates respectively arranged on the four side walls of the coating liquid tank;

[0027] The four first ultrasonic vibration plates and the four second ultrasonic vibration plates are arranged crosswise along the circumferential direction of the coating liquid tank.

[0028] The present invention has at least the following beneficial effects: In the present invention, the coating liquid is mixed by stirring the coating liquid online to prevent the coating quality from being affected by the deposition of magnesium oxide in the coating liquid. There is no need to frequently replace the standby machine, which saves time and labor, is conducive to the continuous production of the unit, and can significantly reduce production costs and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a coating tank provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the arrangement of a first ultrasonic wave generating unit and a second ultrasonic wave generating unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] An embodiment of the present invention provides an operating method of a coating machine, the operating method comprising:

[0035] Before and / or during normal production, the coating liquid in the coating liquid tank 1 is stirred online to mix the coating liquid;

[0036] Apply the mixed coating liquid to the surface of the target object.

[0037] In one of the embodiments, the coating liquid is stirred online by ultrasonic stirring. Equipment such as the ultrasonic vibration plate 3 is easy to arrange and will not interfere with the structure and normal production of the coating tank 1 itself. For example, the ultrasonic vibration plate 3 is installed on the side wall of the coating tank 1.

[0038] One way to stir the coating liquid is to make the coating liquid generate a vortex flow to achieve the purpose of mixing the coating liquid. The coating tank 1 is generally a square tank, such as Figure 1 and Figure 2 By respectively arranging ultrasonic vibration plates 3 on the four side walls of the coating liquid tank 1, the coating liquid tank 1 generates a vortex liquid flow through the cooperation of the ultrasonic vibration plates 3 on the four side walls, which can be achieved by controlling the ultrasonic emission sequence and emission frequency and other parameters on the four side walls; wherein, the ultrasonic vibration plate 3 can be mounted on the side wall of the coating liquid tank 1, or embedded in the side wall of the coating liquid tank 1; preferably, the plate surface of the ultrasonic vibration plate 3 is parallel to the wall surface of the side wall where it is located.

[0039] Preferably, the ultrasonic vibration plate 3 emits ultrasonic waves along the normal direction of the vibration plate surface.

[0040] Preferably, the ultrasonic wave emission path of the ultrasonic vibration plate 3 deviates from the vertical center line of the coating tank 1, so that a vortex liquid flow is easily formed.

[0041] In one embodiment, stirring the coating liquid specifically includes:

[0042] Execute S1a M times and S1b N times until the coating liquid is mixed, M ≥ 1, N ≥ 1;

[0043] Wherein, S1a is: making the coating liquid generate a first vortex liquid flow in a first direction; S1b is: making the coating liquid generate a second vortex liquid flow in a second direction; one of the first direction and the second direction is a clockwise direction, and the other direction is a counterclockwise direction;

[0044] There is one S1b between every two adjacent S1a, and there is one S1b between every two adjacent S1a.

[0045] Optionally, during the stirring process, the number of times S1a and S1b are executed can be determined by judging the mixing degree of the coating liquid; the mixing degree can be judged by the operator by naked eye observation, or can be detected and analyzed by chromatography or other methods.

[0046] The above-mentioned M and N are both integers.

[0047] In the above definition of "there is one S1b between every two adjacent S1a, and one S1b between every two adjacent S1a", that is: there is an adjacent execution step before or after S1a, and the adjacent execution step is S1b; there is an adjacent execution step before or after S1b, and the adjacent execution step is S1a.

[0048] By adopting the cross-execution mode of S1a and S1b, the mixing efficiency and effect of the coating liquid can be improved, and the dead corners in the coating liquid tank 1 can be reduced / avoided, thereby ensuring the uniformity of the coating liquid in various parts of the coating liquid tank 1.

[0049] As described above, preferably, the first vortex liquid flow and the second vortex liquid flow are both achieved by ultrasonic stirring.

[0050] More preferably, if Figure 2 , forming the first vortex liquid flow by a first ultrasonic generating unit, and forming the second vortex liquid flow by a second ultrasonic generating unit;

[0051] The first ultrasonic generating unit includes four first ultrasonic vibration plates 31 respectively arranged on the four side walls of the coating liquid tank 1, and the second ultrasonic generating unit includes four second ultrasonic vibration plates 32 respectively arranged on the four side walls of the coating liquid tank 1. The four first ultrasonic vibration plates 31 and the four second ultrasonic vibration plates 32 are cross-arranged along the circumference of the coating liquid tank 1, that is, in the circumference of the coating liquid tank 1, there is a second ultrasonic vibration plate 32 between every two adjacent first ultrasonic vibration plates 31, and there is a first ultrasonic vibration plate 31 between every two adjacent second ultrasonic vibration plates 32.

[0052] Based on the above arrangement, while achieving the requirements of steps S1a and S1b and the cross-execution requirements of S1a and S1b, the occurrence of dead corners in the coating tank 1 can be further reduced / avoided.

[0053] The action time of the first ultrasonic generating unit and the action time of the second ultrasonic generating unit can be the same or different; the action time of the M S1a steps can be the same or different; the action time of the N S1b steps can be the same or different; in the M S1a steps, the ultrasonic parameters (intensity, frequency) of the four first ultrasonic vibration plates 31 can be the same or different; in the N S1b steps, the ultrasonic parameters (intensity, frequency) of the four second ultrasonic vibration plates 32 can be the same or different. Therefore, by controlling the action parameters of each S1a step and each S1b step, different combinations of stirring parameters can be achieved, which can improve the flexibility and reliability of the mixing operation, and achieve the purpose of efficiently mixing the coating liquid with minimum energy consumption and minimum disturbance to the coating liquid.

[0054] Stirring the coating liquid during normal production can prevent the coating liquid from depositing during use and ensure the coating quality. During this process, it is sufficient to maintain the uniformity of the suspension of the coating liquid. Therefore, optionally, the stirring intensity during normal production can be lower than the stirring intensity before normal production.

[0055] The central console / controller 4 can automatically allocate the execution times of step S1a and step S1b and the action parameters of each step S1a and each step S1b by real-time detection of the deposition of the initial coating liquid and the degree of mixing of the coating liquid. This allocation operation can select corresponding stirring parameters in the database based on the deposition of the initial coating liquid; the database represents the corresponding relationship between the deposition of the coating liquid and the stirring parameters, and this corresponding relationship can be obtained through offline experiments, and the database can be supplemented and corrected by collecting relevant data in actual production.

[0056] For the coating liquid stirring operation before normal production, preferably, the operation method further comprises:

[0057] In S1a and S1b, the coating roller 2 in the coating tank 1 is also rotated to cause disturbance to the top of the first vortex liquid flow and the top of the second vortex liquid flow. This method can further improve the effect and efficiency of coating liquid mixing.

[0058] Furthermore, the operation method further comprises:

[0059] During the interval between S1a and S1b, the rotation speed of the coating roller 2 is increased to destroy the first vortex liquid flow or reduce the vortex intensity of the first vortex liquid flow;

[0060] During the interval between S1b and S1a, the rotation speed of the coating roller 2 is increased to destroy the second vortex liquid flow or reduce the vortex intensity of the second vortex liquid flow.

[0061] Based on the above method, the liquid disturbance during the switching process between S1a and S1b can be reduced to avoid the coating liquid splashing out of the coating tank 1; in addition, this method can also reduce the energy consumption of ultrasonic stirring to a certain extent.

[0062] In one embodiment, the operating method further comprises:

[0063] During the interval between S1a and S1b, the second ultrasonic generating unit is operated to destroy the first vortex liquid flow or reduce the vortex strength of the first vortex liquid flow; wherein the action strength of the second ultrasonic vibration plate 32 (this action strength can be controlled based on parameters such as ultrasonic intensity and frequency) is less than the action strength of the first ultrasonic vibration plate 31 in step S1a, and preferably also less than the action strength of the second ultrasonic vibration plate 32 in step S1b, that is, based on the flexible reverse stirring action of the second ultrasonic generating unit, the purpose of destroying the first vortex liquid flow or reducing the vortex strength of the first vortex liquid flow is achieved; further, during the interval, the action strength of the second ultrasonic vibration plate 32 gradually weakens, or first gradually weakens and then gradually strengthens, so as to smoothly connect with step S1b;

[0064] Likewise, during the interval between S1b and S1a, the first ultrasonic wave generating unit is operated to destroy the second vortex liquid flow or reduce the vortex intensity of the second vortex liquid flow.

[0065] The above method can also reduce the liquid disturbance during the switching process between S1a and S1b, and avoid the coating liquid splashing out of the coating tank 1.

[0066] In one embodiment, the operating method further comprises:

[0067] When the coating liquid needs to be discharged, the coating liquid is made to generate a vortex flow to accelerate the discharge of the coating liquid tank 1.

[0068] Preferably, a temperature control mechanism is provided below the coating tank 1, and the temperature control mechanism includes but is not limited to the temperature control by passing water through the temperature control tank connected to the bottom of the coating tank 1. The temperature control mechanism can ensure that the temperature of the coating liquid meets the requirements; wherein, in the temperature control process, the coating liquid stirring means can be used to improve the temperature uniformity and temperature control efficiency of the coating liquid. In addition, the temperature rise of the coating liquid that may be caused by ultrasonic stirring can be controlled by the temperature control mechanism.

[0069] Embodiment 2

[0070] like Figure 1 and Figure 2 An embodiment of the present invention provides a coating machine, including a coating roller 2 and a coating tank 1. The coating tank 1 is provided with an ultrasonic stirring mechanism for stirring the coating liquid in the coating tank 1.

[0071] The ultrasonic stirring mechanism may adopt the relevant structure in the above-mentioned embodiment 1. For example, the ultrasonic stirring mechanism includes a first ultrasonic generating unit and a second ultrasonic generating unit, etc. The specific structure is not described in detail here.

[0072] Preferably, the coating machine is further provided with a controller 4, the ultrasonic stirring mechanism is electrically connected to the controller 4, and the controller 4 is used to control the ultrasonic stirring mechanism to stir the coating liquid in the coating liquid tank 1 before and / or during normal production to mix the coating liquid. The relevant ultrasonic stirring control strategy can refer to the ultrasonic stirring method of the above-mentioned embodiment 1, which will not be described in detail here.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for operating a coating machine, characterized in that: The operation method comprises: Before and / or during normal production, the coating liquid in the coating tank is stirred online to mix the coating liquid; Apply the mixed coating liquid to the surface of the target object.

2. The method for operating a coating machine according to claim 1, characterized in that: The stirring of the coating liquid specifically includes: Execute S1a M times and S1b N times until the coating liquid is mixed, M ≥ 1, N ≥ 1; Wherein, S1a is: making the coating liquid generate a first vortex liquid flow in a first direction; S1b is: making the coating liquid generate a second vortex liquid flow in a second direction; one of the first direction and the second direction is a clockwise direction, and the other direction is a counterclockwise direction; There is one S1b between every two adjacent S1a, and there is one S1b between every two adjacent S1a.

3. The method for operating a coating machine according to claim 2, characterized in that: The first vortex liquid flow and the second vortex liquid flow are both achieved by ultrasonic stirring.

4. The method for operating a coating machine according to claim 3, characterized in that: The first vortex liquid flow is formed by a first ultrasonic generating unit, and the second vortex liquid flow is formed by a second ultrasonic generating unit; The first ultrasonic generating unit includes four first ultrasonic vibration plates respectively arranged on the four side walls of the coating liquid tank, and the second ultrasonic generating unit includes four second ultrasonic vibration plates respectively arranged on the four side walls of the coating liquid tank, and the four first ultrasonic vibration plates and the four second ultrasonic vibration plates are cross-arranged along the circumference of the coating liquid tank.

5. The method for operating a coating machine according to claim 2, characterized in that: The operation method further comprises: In S1a and S1b, the coating roller in the coating tank is also rotated to cause disturbance to the top of the first vortex liquid flow and the top of the second vortex liquid flow.

6. The method for operating a coating machine according to claim 5, characterized in that: The operation method further comprises: In the interval between S1a and the next adjacent S1b, the rotation speed of the coating roller is increased to destroy the first vortex liquid flow or reduce the vortex intensity of the first vortex liquid flow; During the interval between S1b and the next S1a, the rotation speed of the coating roller is increased to destroy the second vortex liquid flow or reduce the vortex intensity of the second vortex liquid flow.

7. The method for operating a coating machine according to claim 1, characterized in that: The operation method further comprises: When the coating liquid needs to be discharged, the coating liquid is made to generate a vortex flow to accelerate the discharge of the coating liquid tank.

8. A coating machine, comprising a coating roller and a coating tank, characterized in that: An ultrasonic stirring mechanism is arranged in the coating liquid tank for stirring the coating liquid in the coating liquid tank.

9. The coating machine according to claim 8, characterized in that A controller is also provided, and the ultrasonic stirring mechanism is electrically connected to the controller. The controller is used to control the ultrasonic stirring mechanism to stir the coating liquid in the coating liquid tank before and / or during normal production to mix the coating liquid.

10. The coating machine according to claim 8 or 9, characterized in that: The ultrasonic stirring mechanism comprises: A first ultrasonic generating unit, used to generate a first vortex liquid flow in a first direction in the coating liquid; the first ultrasonic generating unit comprises four first ultrasonic vibration plates respectively arranged on four side walls of the coating liquid tank; A second ultrasonic generating unit, used to make the coating liquid generate a second vortex liquid flow in a second direction; the second ultrasonic generating unit comprises four second ultrasonic vibration plates respectively arranged on the four side walls of the coating liquid tank; The four first ultrasonic vibration plates and the four second ultrasonic vibration plates are arranged crosswise along the circumferential direction of the coating liquid tank.

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