Stable liquid supply mechanism and film coating device capable of supplying liquid stably

Abstract

The utility model relates to the technical field of liquid supply equipment and the manufacturing process of a film with a coating, in particular to a stable liquid supply mechanism and a film coating device comprising the stable liquid supply mechanism, the stable liquid supply mechanism comprises a circulating liquid storage part, a viscosity control part and a liquid adding part, the viscosity control part can monitor the viscosity of liquid in the circulating liquid storage part in real time and control the liquid adding part to add low-viscosity liquid into the circulating liquid storage part so as to reduce the viscosity of the liquid in the circulating liquid storage part; meanwhile, the circulating liquid storage part and the liquid adding part are both of a closed structure, so that the problem of solvent volatilization caused by contact with the external environment can be avoided, the purpose of improving the viscosity stability of liquid is achieved, and the coating quality of the film coating device is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid supply equipment technology and the field of film processing with coating, especially to a stable liquid supply mechanism and stable liquid supply film coating device. BACKGROUND

[0002] In the fields of industrial production, construction engineering, medical health, photoelectricity / photovoltaic / semiconductor industry, food and beverage, etc., liquid supply systems are involved. In the field of film processing, for example, various functional coating liquids are coated on the surface of film substrates to achieve predetermined properties and produce various functional films, such as release films and protective films. The coating liquid can be coated by roll coating, doctor blade, slot, etc. The coating liquid is continuously supplied by the liquid supply system and the coating process is repeated in a cycle.

[0003] For example, a measurable coating mechanism and coating machine are disclosed in publication number CN211989403U. The coating mechanism includes a weighing device, a supply tank, a first pipeline, a second pipeline, a supply pump, and a coating device. The supply tank is installed on the weighing device. The supply tank includes an inlet at the top and an outlet at the bottom. The inlet is provided with a filling port for filling the coating liquid. The first pipeline is connected between the outlet and the coating device. The second pipeline is connected between the inlet and the coating device. The supply pump is installed on the first pipeline. The usage of the coating liquid can be calculated by comparing the real-time weight value with the initial weight value. Then, the thickness of the coating liquid per square can be calculated by calculating the square number of the coating. Thus, the stability of the coating thickness can be monitored in real time. When the coating thickness changes, the viscosity of the coating liquid can be adjusted in time to improve the uniformity and stability of the product coating.

[0004] During the coating process of the coating liquid, the viscosity of the coating liquid inevitably increases due to solvent evaporation and other reasons in the process after a long time of continuous production. This affects the continuous coating of the film. Currently, to address the increase in the viscosity of the coating liquid, one approach is to discard the old coating liquid and replace it with new coating liquid at regular intervals. Another approach is to intermittently add low-viscosity coating liquid to reduce the viscosity of the coating liquid.

[0005] The above-mentioned solution uses an open tank. Although the coating liquid in the supply tank can be added, reduced, and the viscosity of the coating liquid adjusted at any time, the open tank is prone to solvent evaporation, which exacerbates the increase in the viscosity of the coating liquid. In addition, the weighing device can only measure the usage of the coating liquid and cannot measure the viscosity of the coating liquid. Therefore, the impact of the increase in the viscosity of the coating liquid on the coating quality cannot be avoided. There is an urgent need to develop a liquid supply system with stable liquid supply function to solve the above-mentioned problems. SUMMARY

[0006] The utility model provides a kind of stable liquid supply mechanism and stable liquid supply film coating device, to solve the above problems and one or more of other potential problems.

[0007] In the first aspect, the utility model provides a kind of stable liquid supply mechanism, it is characterized in that, including the circulation liquid storage part of supplying liquid and recycling excess liquid, the viscosity control part for detecting and controlling the liquid viscosity in circulation liquid storage part is connected with circulation liquid storage part, and the liquid adding part is connected with circulation liquid storage part by viscosity control part and adds low viscosity liquid to circulation liquid storage part, and circulation liquid storage part and liquid adding part are all closed structure.

[0008] The utility model discloses a stable liquid supply mechanism recycles excess liquid in the process of supplying liquid by designing circulation liquid storage part, designs viscosity control part and monitors the liquid viscosity of circulation liquid storage part in real time, and low viscosity liquid is input to circulation liquid storage part by liquid adding part, so as to adjust the liquid viscosity in circulation liquid storage part at any time to control the stability of liquid viscosity, reach the effect of stable liquid supply.Circulation liquid storage part and liquid adding part are all closed structure, prevent the problem of liquid viscosity rise caused by liquid contact with external environment volatilization, also avoid the problem of impurity introduction of external environment.

[0009] In some embodiments, the circulation liquid storage part includes a circulation storage barrel and a first agitator disposed in the circulation storage barrel.

[0010] In some embodiments, the viscosity control part includes a sampling tube connected to the circulation liquid storage part to take liquid, a viscosity test unit for testing the viscosity of the liquid, a control unit for controlling the stability of the liquid viscosity in the circulation liquid storage part, and a viscosity-reducing feed pipe for inputting the liquid in the viscosity test unit and the low-viscosity liquid from the liquid adding part into the circulation liquid storage part through the control unit.

[0011] In some embodiments, the liquid adding part includes a viscosity-reducing storage barrel for storing low-viscosity liquid, a viscosity-reducing replenishment pipe for connecting the viscosity-reducing storage barrel and the viscosity control part, and a second agitator disposed in the viscosity-reducing storage barrel.

[0012] In some embodiments, the bottom of the circulation storage barrel is conical.

[0013] In the embodiment, the conical bottom of the circulation storage barrel helps to guide the precipitates in the liquid to the center, facilitating the first agitator to shear and disperse the high-viscosity liquid, preventing the solid components in the liquid from precipitating at the bottom of the barrel, improving the uniformity of the liquid viscosity and the uniformity of the stirring and dispersion, and avoiding precipitation.

[0014] In some embodiments, the viscosity-reducing storage barrel of the liquid adding part is detachable and replaceable.

[0015] In some embodiments, the first agitator and the second agitator are both paddle agitators.

[0016] In a second aspect, the utility model provides a thin film coating device of stable liquid supply, its characterized in be including the stable liquid supply mechanism of any one of first aspect.

[0017] In the prior art, for cost considerations, the excess coating liquid after coating by the coating roller is often recycled, the solvent in the coating liquid volatilizes, which affects the rheological properties of the remaining coating liquid and makes it more viscous. Therefore, in order to solve the problem of viscosity rise caused by recycling the excess coating liquid after coating by the coating roller and control the stability of the viscosity of the coating liquid in the circulating liquid storage part, the thin film coating device provided by the utility model is designed to add a stable liquid supply mechanism, which controls the stability of the viscosity of the coating liquid through a specially designed stable liquid supply mechanism, ensures the coating quality of the thin film, and the stable liquid supply mechanism monitors the viscosity of the coating liquid in the circulating liquid storage part in real time through the viscosity control part. When the viscosity of the coating liquid rises, the viscosity control part controls the liquid adding part to add low-viscosity coating liquid to the circulating liquid storage part, thereby reducing the viscosity of the coating liquid in the circulating liquid storage part and ensuring the stability of the viscosity of the coating liquid in the circulating liquid storage part, achieving stable liquid supply to the coating roller and improving the coating quality of the coating roller.

[0018] Further, since the circulating liquid storage part and the material adding part of the stable liquid supply mechanism are both closed structures, in addition to the temporary external environmental control causing solvent volatilization of the excess coating liquid after coating by the coating roller, other processes will not cause the problem of viscosity rise of the coating liquid caused by solvent volatilization due to contact with the external environment.

[0019] In some embodiments, the coating roller is internally hollow and provided with a liquid storage tank, a plurality of inlet ports are arranged at the bottom of the coating roller and communicate with the liquid storage tank, and an outlet port is arranged at the side of the coating roller and communicates with the liquid storage tank. The circulating liquid storage part is connected with the inlet ports and the outlet port respectively to support the circulation of liquid between the coating roller and the circulating liquid storage part.

[0020] In the embodiments, the coating liquid of the circulating liquid storage part enters the liquid storage tank through the inlet ports, and the excess coating liquid after coating by the coating roller flows back into the circulating liquid storage part through the outlet port, thereby realizing the recycling of the excess coating liquid.

[0021] In some embodiments, the top of the circulating liquid storage part is provided with a circulating return pipe connected with the outlet port of the coating roller and used for recycling the excess liquid in the coating roller, and the bottom of the circulating liquid storage part is provided with a circulating outlet pipe connected with the inlet port of the coating roller and used for delivering liquid to the coating roller.

[0022] In some embodiments, power pumps are arranged on the circulating return pipe and the circulating outlet pipe.

[0023] By implementing the above technical solutions, the utility model has the following advantages:

[0024] The stable liquid supply mechanism provided by the utility model recycles the excess liquid in the liquid supply process through the design of the circulating liquid storage part, monitors the liquid viscosity of the circulating liquid storage part in real time through the design of the viscosity control part, and inputs low-viscosity liquid into the circulating liquid storage part through the liquid adding part, so that the liquid viscosity in the circulating liquid storage part is adjusted in real time to control the stability of the liquid viscosity, and the effect of stable liquid supply is achieved.

[0025] Further, the film coating device for stable liquid supply provided by the utility model includes the stable liquid supply mechanism, the viscosity control part is used for monitoring the viscosity of the coating liquid in the circulating liquid storage part in real time, and the low-viscosity coating liquid added by the liquid adding part into the circulating liquid storage part is controlled to reduce the viscosity of the coating liquid in the circulating liquid storage part, so that the purpose of improving the viscosity stability of the coating liquid is achieved, the coating uniformity of the coating layer is improved, and the high-quality and high-efficiency production of the film with the coating layer is realized. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0027] Figure 1 It is the structural schematic diagram of the utility model.

[0028] The numbers in the figure represent: 1, coating roller, 2, liquid storage tank, 3, circulating discharge pipe, 4, circulating return pipe, 5, power pump, 6, circulating storage barrel, 7, first agitator, 8, viscosity control part, 9, sampling pipe, 10, viscosity-reducing feeding pipe, 11, viscosity-reducing material supplementing pipe, 12, second agitator, 13, viscosity-reducing storage barrel. DETAILED DESCRIPTION

[0029] The utility model will be further described in detail according to the drawings and specific embodiments.

[0030] It should be noted that the following implementation cases are only used to illustrate the technical solutions of the utility model, and not to limit them; those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

[0031] In the following description, the appearance of terms such as "inner", "outer", "upper", "lower", "left", "right" and the like indicates the orientation or positional relationship only for the convenience of describing the embodiments and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility new type.

[0032] As shown in Figure 1 A stable liquid supply mechanism is provided, characterized by comprising a circulating liquid storage part for supplying liquid and recovering excess liquid, a viscosity control part 8 connected with the circulating liquid storage part for detecting and controlling the viscosity of the liquid in the circulating liquid storage part, and a liquid adding part connected with the circulating liquid storage part through the viscosity control part 8 and adding low-viscosity liquid to the circulating liquid storage part, both the circulating liquid storage part and the liquid adding part are closed structures.

[0033] The stable liquid supply mechanism provided in the embodiment recovers the excess liquid in the liquid supply process by designing the circulating liquid storage part, monitors the viscosity of the liquid in the circulating liquid storage part in real time by designing the viscosity control part 8, and inputs low-viscosity liquid to the circulating liquid storage part through the liquid adding part, so as to adjust the viscosity of the liquid in the circulating liquid storage part at any time to control the stability of the liquid viscosity, and achieve the effect of stable liquid supply. Further, the circulating liquid storage part and the liquid adding part are both closed structures, which can prevent the problem of rising of liquid viscosity caused by contact and volatilization of liquid with the external environment, and also avoid the problem of introduction of impurities from the external environment.

[0034] In some embodiments, the circulating liquid storage part comprises a circulating storage barrel 6 and a first agitator 7 arranged in the circulating storage barrel 6. The liquid in the circulating storage barrel 6 is stirred and mixed uniformly by the first agitator 7.

[0035] In some embodiments, the viscosity control part 8 comprises a sampling tube 9 connected with the circulating liquid storage part to take liquid, a viscosity test unit for testing the viscosity of the liquid, a control unit for controlling the stability of the viscosity of the liquid in the circulating liquid storage part, and a viscosity-reducing feed pipe 10 for inputting the liquid in the viscosity test unit and the low-viscosity liquid of the liquid adding part into the circulating liquid storage part through the control unit.

[0036] In some embodiments, the liquid adding part comprises a viscosity-reducing storage barrel 13 for storing low-viscosity liquid, a viscosity-reducing replenishment pipe 11 for connecting the viscosity-reducing storage barrel 13 with the viscosity control part 8, and a second agitator 12 arranged in the viscosity-reducing storage barrel 13.

[0037] In some embodiments, the bottom of the circulating storage barrel 6 is conical.

[0038] In the embodiment, the bottom of the circulating storage tank 6 is conical, which helps to guide the precipitate in the liquid to the center, facilitates the first agitator 7 to shear and disperse the high viscosity liquid, prevents the solid components in the liquid from depositing at the bottom of the tank, improves the uniformity of the liquid viscosity and the uniformity of the stirring and dispersion, and avoids the deposition.

[0039] In some embodiments, the viscosity-reducing storage tank 13 of the liquid adding part is detachable and replaceable.

[0040] In the embodiment, the viscosity-reducing storage tank 13 is detachable and replaceable, and when the low viscosity liquid in one viscosity-reducing storage tank 13 is used up during the use of the device, another viscosity-reducing storage tank 13 full of low viscosity liquid can be replaced in time, thereby improving the production efficiency.

[0041] In some embodiments, the first agitator 7 and the second agitator 12 are both paddle agitators.

[0042] As shown in Figure 1 , a film coating device with stable liquid supply is provided, which comprises a stable liquid supply mechanism.

[0043] The film coating device provided in the embodiment is designed to add a stable liquid supply mechanism, which controls the viscosity stability of the coating liquid through a specially designed stable liquid supply mechanism, ensures the coating quality of the film, and the stable liquid supply mechanism monitors the viscosity of the coating liquid in the circulating liquid storage part through the viscosity control part 8. When the viscosity of the coating liquid rises, the viscosity control part 8 controls the liquid adding part to add low viscosity coating liquid to the circulating liquid storage part, thereby reducing the viscosity of the coating liquid in the circulating liquid storage part and ensuring the stability of the viscosity of the coating liquid in the circulating liquid storage part, thereby realizing stable liquid supply to the coating roller 1 and improving the coating quality of the coating roller 1.

[0044] Further, since the circulating liquid storage part and the liquid adding part of the stable liquid supply mechanism are both closed structures, except that the excess coating liquid after coating by the coating roller 1 will be temporarily exposed to the external environment to cause solvent evaporation, other processes will not cause the coating liquid to contact the external environment to cause solvent evaporation and thus cause the viscosity of the coating liquid to rise.

[0045] In some embodiments, the coating roller 1 is internally hollow and provided with a liquid storage tank 2, a plurality of feeding ports are arranged at the bottom of the coating roller 1 and communicate with the liquid storage tank 2, and a discharging port is arranged at the side of the coating roller 1 and communicates with the liquid storage tank 2. The circulating liquid storage part is connected with the feeding ports and the discharging port respectively to support the circulation of the liquid between the coating roller 1 and the circulating liquid storage part.

[0046] In the embodiment, the coating liquid of the circulating liquid storage part enters the liquid storage tank 2 through the feeding port, and the excess coating liquid after coating by the coating roller 1 flows back into the circulating liquid storage part through the discharging port, thereby realizing the recycling of the excess coating liquid.

[0047] In some embodiments, the top of the circulating liquid storage part is provided with a circulating return pipe 4 connected to the discharge port of the coating roller 1 and used for recycling the excess liquid in the coating roller 1, and the bottom of the circulating liquid storage part is provided with a circulating discharge pipe 3 connected to the feed port of the coating roller 1 and used for delivering the liquid to the coating roller 1.

[0048] Before the coating starts, the coating liquid is arranged in the circulating liquid storage barrel in the circulating liquid storage part, the initial value of the viscosity of the coating liquid is measured by using the viscosity control part 8, and the low-viscosity coating liquid is stored in the viscosity-reducing storage barrel 13 of the liquid adding part, and the viscosity of the low-viscosity coating liquid is ensured to be 10%-15% lower than that of the coating liquid in the circulating liquid storage part. During the coating process, the excess coating liquid recycled through the circulating return pipe 4 is fully mixed with the coating liquid in the circulating storage barrel 6 by the continuous stirring of the first stirrer 7, the viscosity of the coating liquid in the circulating liquid storage barrel is uniformly distributed, and then the uniformly mixed coating liquid is delivered to the coating roller 1 through the circulating discharge pipe 3 at the bottom of the circulating storage barrel 6 to continue the coating, so as to realize the circulation and stable liquid supply. In the embodiment, the sampling pipe 9 is used for sampling from the bottom of the circulating liquid storage part to ensure that the viscosity of the detected coating liquid is close to the viscosity of the coating liquid being coated on the coating roller 1, and the viscosity control part 8 is used for real-time monitoring the viscosity of the coating liquid in the circulating liquid storage barrel. When the viscosity of the coating liquid in the circulating liquid storage part increases or the storage amount decreases, the control unit of the viscosity control part 8 controls the low-viscosity coating liquid in the liquid adding part to enter the circulating liquid storage part through the viscosity-reducing replenishment pipe 11 and the viscosity-reducing feed pipe 10, until the viscosity of the coating liquid in the circulating liquid storage part returns to the initial value, so as to adjust the viscosity of the coating liquid in the circulating liquid storage part and control the stability of the viscosity of the coating liquid at any time.

[0049] In some embodiments, the circulating return pipe 4 and the circulating discharge pipe 3 are both provided with a power pump 5. In the embodiment, the power pump 5 is used for realizing the rapid delivery of the coating liquid.

[0050] The applicant declares that the above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. It should be understood by those skilled in the art that any changes or replacements within the technical scope disclosed by the present application can be easily thought of by any person skilled in the art, and all fall within the protection scope and disclosure scope of the present application.

Claims

1. A stable liquid supply mechanism characterized by comprising: The application relates to a stable liquid supply mechanism, which comprises a circulating liquid storage part for supplying liquid and recovering excess liquid, a viscosity control part (8) connected with the circulating liquid storage part for detecting and controlling the viscosity of liquid in the circulating liquid storage part, and a liquid adding part connected with the circulating liquid storage part through the viscosity control part (8) and adding low-viscosity liquid to the circulating liquid storage part, wherein the circulating liquid storage part and the liquid adding part are both in a closed structure.

2. The stable liquid supply mechanism according to claim 1, characterized by The circulating liquid storage part comprises a circulating storage barrel (6) and a first agitator (7) arranged in the circulating storage barrel (6).

3. The stable liquid supply mechanism according to claim 1, characterized by The viscosity control part (8) comprises a sampling pipe (9) connected with the circulating liquid storage part to take liquid, a viscosity testing unit for testing the viscosity of liquid, a control unit for controlling the viscosity stability of liquid in the circulating liquid storage part, and a viscosity-reducing feeding pipe (10) for inputting liquid in the viscosity testing unit and low-viscosity liquid in the liquid adding part into the circulating liquid storage part through the control unit.

4. The liquid supply mechanism according to claim 1, wherein The liquid adding part comprises a viscosity-reducing storage barrel (13) for storing low-viscosity liquid, a viscosity-reducing feeding pipe (11) for connecting the viscosity-reducing storage barrel (13) with the viscosity control part (8), and a second agitator (12) arranged in the viscosity-reducing storage barrel (13).

5. The liquid supply mechanism according to claim 2, wherein The bottom of the circulating storage barrel (6) is conical.

6. The constant liquid supply mechanism according to claim 4, wherein The viscosity-reducing storage barrel (13) of the liquid adding part is detachable and replaceable.

7. A stable liquid supply film coating apparatus characterized by comprising: The application further relates to a stable liquid supply mechanism comprising the stable liquid supply mechanism according to any one of claims 1-6.

8. The film coating apparatus of claim 7, wherein The application relates to a stable liquid supply mechanism, which comprises a circulating liquid storage part for supplying liquid and recovering excess liquid, a viscosity control part (8) connected with the circulating liquid storage part for detecting and controlling the viscosity of liquid in the circulating liquid storage part, and a liquid adding part connected with the circulating liquid storage part through the viscosity control part (8) and adding low-viscosity liquid to the circulating liquid storage part, wherein the circulating liquid storage part and the liquid adding part are both in a closed structure.

9. The film coating apparatus of claim 8, wherein, The top of the circulating liquid storage part is provided with a circulating return pipe (4) connected with the discharge port of the coating roller (1) and used for recovering excess liquid in the coating roller (1), and the bottom of the circulating liquid storage part is provided with a circulating discharge pipe (3) connected with the feeding port of the coating roller (1) and used for delivering liquid to the coating roller (1).

10. The film coating apparatus of claim 9, wherein The circulating return pipe (4) and the circulating discharge pipe (3) are both provided with power pumps (5).

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