A pressure screen system for surface coating of a coating machine

Abstract

This utility model discloses a pressure screen system for top coating of a coating machine, including a feeding pump, a pressure screen, and a coating machine. The feeding pump is used to pump the prepared coating. A feeding pipeline is provided between the feeding pump and the pressure screen to supply material to the pressure screen. A high-level tank is installed on the discharge pipeline between the pressure screen and the coating machine to store the filtered coating and directly supply the filtered coating to the curtain of the coating machine. A metering pump is also installed on the discharge pipeline between the pressure screen and the high-level tank to meter the filtered coating discharged from the pressure screen and quantitatively supply the filtered coating to the high-level tank. Through the effective cooperation of the feeding pump, pressure screen, metering pump, and high-level tank, the filtration accuracy of the coating liquid is improved, coating defects are reduced, the frequency of large particles of impurities in the coating liquid easily passing through the screen is reduced, downtime for cleaning is reduced, water resources are saved, and the pass rate and production efficiency of coated paper are effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of paper coating, and in particular to a pressure screen system for coating machines. Background Technology

[0002] In the papermaking process, a coating machine is a device used to coat the surface of paper with a coating. In order to improve the quality and uniformity of the coating, the raw materials are filtered by a pressure screen before coating to reduce impurities and air bubbles.

[0003] A pressure screen is a cylindrical container with porous walls. The coating material enters the pressure screen through a coating pipe. The pressure screen rotates the raw material entering the screen by rotating blades, thereby creating a pressure difference on both sides of the cylindrical screen. The raw material that meets the standard flows out through the screen, while impurities sink and are discharged. Then, it is transported to the coating machine through a coating pipe connected between the pressure screen and the coating machine, so as to coat the base paper.

[0004] However, the existing coated paper quality is insufficient, and the pressure screen's sieve mesh size is only 0.1μm. This causes large particles of impurities in the coating liquid to easily pass through the screen, resulting in foreign objects stuck in the coating curtain, causing uneven coating and thin streaks. This also means that impurities can easily become embedded in the screen mesh under pressure. The coating passing through the screen requires frequent shutdowns for cleaning, severely impacting production efficiency. Moreover, the cleaning process requires a large amount of water, resulting in low environmental efficiency and resource waste. Therefore, the existing pressure screen system cannot effectively filter fine impurities, and the entire system needs to be optimized to improve filtration accuracy and stability. Summary of the Invention

[0005] This utility model provides a pressure screen system for the top coating of a coating machine, which improves the filtration accuracy of the coating liquid, reduces coating defects, increases the pass rate of coated paper and production efficiency, reduces the frequency of large particles of impurities in the coating liquid passing through the screen, reduces downtime for cleaning, and saves water resources.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A pressure screen system for coating a coating machine includes a feed pump, a pressure screen, and a coating machine, wherein the feed pump is used to pump out the prepared coating.

[0008] A feeding pipeline for supplying material to the pressure screen is provided between the feeding pump and the pressure screen.

[0009] A high-level tank is installed on the discharge pipe between the pressure screen and the coating machine for storing the filtered coating and supplying the filtered coating directly to the curtain head of the coating machine.

[0010] A metering pump is also installed on the discharge pipeline between the pressure screen and the high-level tank to measure the filter coating discharged from the pressure screen and to quantitatively supply the filtered coating to the high-level tank.

[0011] Preferably, a first shut-off valve for controlling the on / off state of the pipeline is also provided on the feeding pipeline between the feeding pump and the pressure screen.

[0012] Preferably, a second shut-off valve for controlling the on / off state of the pipeline is also installed on the discharge pipeline between the pressure screen and the metering pump.

[0013] Preferably, the pressure screen includes a bottom support base, a cylindrical body, and a screen drum installed inside the cylindrical body. The cylindrical body is vertically installed on the bottom support base. The upper part of the cylindrical body is provided with a paint inlet pipe communicating with a feeding pipeline, and the bottom of the cylindrical body is provided with a paint outlet pipe communicating with a discharge pipeline. The bottom of the cylindrical body is also provided with a drain pipe for discharging waste filtered out by the screen drum.

[0014] Preferably, the sewage pipe is also equipped with a third shut-off valve to control the opening and closing of the pipeline.

[0015] Preferably, the inner sieve drum of the cylindrical body is made of 316L stainless steel and has a uniform array of sieve holes with a mesh size of 0.08μm.

[0016] Preferably, the surface of the sieve drum is further coated with a nano-ceramic coating to reduce the adhesion rate of impurities.

[0017] The beneficial effects of this utility model are:

[0018] By effectively coordinating the feeding pump, pressure screen, metering pump, and high-level tank, the accuracy of coating liquid filtration is improved, coating defects are reduced, downtime for cleaning is reduced, water resources are saved, and the pass rate and production efficiency of coated paper are effectively improved.

[0019] The pressure screen's drum is made of 316L stainless steel with a uniform array of 0.08μm mesh openings. The 316L stainless steel material effectively enhances corrosion resistance and wear resistance. A nano-ceramic coating on the drum surface further reduces impurity adhesion. During processing, the drum's mesh openings are drilled using high-precision laser technology to ensure uniformity. Multiple axial support frames are installed inside the drum to increase its strength and prevent deformation during high-speed operation. The entire pressure screen effectively improves the filtration accuracy of the coating liquid, reduces coating defects, lowers the frequency of large particles passing through the screen, reduces downtime for cleaning, and conserves water resources.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a system schematic diagram of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] If the terms "first," "second," and "third" are used only to distinguish technical features, they should not be interpreted as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0024] A pressure screen system for three-sided coating of a coating machine, such as Figure 1 As shown, the system includes a feeding pump 1, a pressure screen 2, and a coating machine 3. The feeding pump 1 is used to pump the prepared coating. A feeding pipeline 4 is provided between the feeding pump 1 and the pressure screen 2 to supply material to the pressure screen 2. A high-level tank 6 is installed on the discharge pipeline 5 between the pressure screen 2 and the coating machine 3 to store the filtered coating and directly supply the filtered coating to the curtain of the coating machine 3. A metering pump 7 is also installed on the discharge pipeline 5 between the pressure screen 2 and the high-level tank 6 to meter the filtered coating discharged from the pressure screen 2 and quantitatively supply the filtered coating to the high-level tank 6. A first shut-off valve 8 is also provided on the feeding pipeline 4 between the feeding pump 1 and the pressure screen 2 to control the on / off of the pipeline, and a second shut-off valve 9 is also provided on the discharge pipeline 5 between the pressure screen 2 and the metering pump 7 to control the on / off of the pipeline.

[0025] Continue as Figure 1 As shown, the pressure screen 2 includes a bottom support 20, a cylindrical body 21, and a screen drum (not shown) rotatably mounted inside the cylindrical body via a screen rod. A motor 22 for driving the screen drum to rotate is provided at the top of the cylindrical body 21. The cylindrical body 21 is vertically mounted on the bottom support 20. A paint inlet pipe 10 connected to the feeding pipe 4 is provided at the upper part of the cylindrical body 21, and a paint outlet pipe 11 connected to the discharge pipe 5 is provided at the bottom of the cylindrical body 21. A drain pipe 12 for discharging waste filtered out by the screen drum is also provided at the bottom of the cylindrical body 21, and a third shut-off valve 13 for controlling the opening and closing of the pipeline is also provided on the drain pipe 12.

[0026] In this embodiment, the screen drum inside the cylindrical body 21 is made of 316L stainless steel with a uniformly distributed array of 0.08μm mesh openings. A nano-ceramic coating is also applied to the surface of the screen drum to reduce impurity adhesion. The 316L stainless steel material effectively improves corrosion resistance and wear resistance. During processing, the screen openings on the screen drum are drilled using a high-precision laser drilling process to ensure uniformity. Simultaneously, multiple axial support frames are installed inside the screen drum to increase its strength and prevent deformation during high-speed operation. The entire pressure screen 2 effectively improves the filtration accuracy of the coating liquid, reduces coating defects, lowers the frequency of large particles of impurities passing through the screen, reduces downtime for cleaning, effectively saves water resources, and effectively improves the pass rate and production efficiency of coated paper.

[0027] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. All equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A pressure screen system for surface coating in a coating machine, characterized in that, It includes a feed pump, a pressure screen, and a coating machine, wherein the feed pump is used to pump out the prepared coating; A feeding pipeline for supplying material to the pressure screen is provided between the feeding pump and the pressure screen. A high-level tank is installed on the discharge pipe between the pressure screen and the coating machine for storing the filtered coating and supplying the filtered coating directly to the curtain head of the coating machine. A metering pump is also installed on the discharge pipeline between the pressure screen and the high-level tank to measure the filter coating discharged from the pressure screen and to quantitatively supply the filtered coating to the high-level tank.

2. The pressure screen system for surface coating of a coating machine according to claim 1, characterized in that: A first shut-off valve for controlling the on / off state of the pipeline is also installed on the feeding pipeline between the feeding pump and the pressure screen.

3. The pressure screen system for surface coating of a coating machine according to claim 1, characterized in that: A second shut-off valve for controlling the on / off state of the pipeline is also installed on the discharge pipeline between the pressure screen and the metering pump.

4. A pressure screen system for surface coating in a coating machine according to claim 1, characterized in that: The pressure screen includes a bottom support base, a cylindrical body, and a screen drum installed inside the cylindrical body. The cylindrical body is vertically installed on the bottom support base. The upper part of the cylindrical body is provided with a paint inlet pipe connected to a feeding pipeline, and the bottom of the cylindrical body is provided with a paint outlet pipe connected to a discharge pipeline. The bottom of the cylindrical body is also provided with a drain pipe for discharging waste filtered out by the screen drum.

5. A pressure screen system for surface coating in a coating machine according to claim 4, characterized in that: The sewage pipe is also equipped with a third shut-off valve to control the flow of the pipeline.

6. A pressure screen system for surface coating in a coating machine according to claim 4, characterized in that: The inner sieve drum of the cylindrical body is made of 316L stainless steel and has a uniform array of sieve holes with a mesh size of 0.08μm.

7. A pressure screen system for surface coating in a coating machine according to claim 4, characterized in that: The surface of the sieve drum is also coated with a nano-ceramic coating to reduce the adhesion rate of impurities.

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