Device and method for removing residual liquid on surface of plate strip

Abstract

The invention relates to a device and method for removing residual liquid on the surface of a plate strip. Specifically, a first wringing roller is adopted for carrying out primary roller type wringing treatment on the plate strip; on the outlet side of the first wringing roller, airflow at the outlet of the first wringing roller is guided through rotation of the first wringing upper roller and an arranged upper air guide plate, so that the situation that liquid on the side roller gap side flows towards the middle roller gap side is improved; and compressed air is blown to an outlet of the first wringing roller, so that the air pressure of the middle roller gap side is larger than that of the side roller gap side, and liquid channeling caused by air flow of the side roller gap side is prevented. According to the residual liquid removing device, through interaction of the first wringing roller, the air guide unit, the compressed air compensation unit and other structures, the residual liquid removing effect is guaranteed, meanwhile, the compressed air consumption is remarkably reduced, the production cost is saved, and the production environment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of strip steel production, and in particular relates to a device for removing residual liquid on the surface of a strip and a method for removing residual liquid on the surface of a strip. Background Art

[0002] In the process of plate and strip rolling production, a large amount of rolling oil or emulsion is needed to lubricate and cool the rollers and strips, but these rolling oil or emulsions need to be removed at the strip outlet and are not allowed to remain on the strip surface. Leaving them on the strip surface will have an adverse effect on product quality and cause a large amount of rolling oil waste, which will also affect the rolling process.

[0003] At present, a large amount of compressed air is usually used to purge the surface of the strip at the exit of the rolling mill. The compressed air consumption is very large. Taking a single-stand reversible rolling mill in China as an example, the compressed air consumption per hour is 3500m 3 / h, equivalent to a ton of steel cost of ~10 yuan / t. At the same time, compressed air blowing cannot completely remove the residual liquid on the surface, and the noise pollution caused by compressed air blowing is serious. Moreover, high-pressure compressed air will blow away the liquid, causing the liquid to splash everywhere, which has a great impact on the surrounding environment. Summary of the invention

[0004] The invention relates to a device for removing residual liquid on the surface of a plate strip and a method for removing residual liquid on the surface of a plate strip, which can at least solve some defects of the prior art.

[0005] The present invention relates to a device for removing residual liquid on the surface of a plate strip, comprising a first squeezing roller, an air guide unit and a compressed air compensation unit.

[0006] The first squeezing roller comprises a first squeezing upper roller and a first squeezing lower roller, and the first squeezing upper roller and / or the first squeezing lower roller are equipped with a lifting drive mechanism;

[0007] The air guide unit comprises an upper air guide plate, which is arranged at the outlet side of the first squeezing roller and located above the strip running channel, and is used to guide the airflow at the outlet of the first squeezing roller to improve the situation that the liquid at the edge roll gap side flows to the middle roll gap side;

[0008] The compressed air compensation unit includes an upper compressed air blowing unit, which includes a plurality of upper compressed air nozzles arranged on the outlet side of the first squeezing roller and located above the plate and strip running channel, and is used to spray compressed air toward the outlet of the first squeezing roller, so that the air pressure on the middle roller gap side is greater than the air pressure on the edge roller gap side.

[0009] As one of the embodiments, the air guide unit also includes a lower air guide plate, which is arranged on the outlet side of the first squeezing roller and located below the plate and strip running channel, and is used to guide the airflow at the outlet of the first squeezing roller to improve the situation where the liquid on the edge roller gap side flows to the middle roller gap side.

[0010] As one of the embodiments, the compressed air compensation unit also includes a lower compressed air blowing unit, which includes a plurality of lower compressed air nozzles arranged on the outlet side of the first squeezing roller and located below the plate and strip running channel, and is used to spray compressed air toward the outlet of the first squeezing roller, so that the air pressure on the middle roller gap side is greater than the air pressure on the edge roller gap side.

[0011] As one of the embodiments, the device for removing residual liquid on the surface of the plate strip also includes a second squeezing roller, and the second squeezing roller is arranged downstream of the first squeezing roller along the running direction of the plate strip; the second squeezing roller includes a second squeezing upper roller and a second squeezing lower roller, and the second squeezing upper roller and / or the second squeezing lower roller are equipped with a lifting drive mechanism.

[0012] As one of the implementation modes, the roller diameter of the second squeezing roller is smaller than the roller diameter of the first squeezing roller.

[0013] As one of the implementation modes, a wiper unit is provided at the inlet side of the second squeeze roller for at least scraping off residual liquid on the upper surface of the plate strip.

[0014] As one of the embodiments, a water baffle is provided at least one of the strip inlet side of the second upper squeeze roller, the strip outlet side of the second upper squeeze roller, and the strip outlet side of the second lower squeeze roller.

[0015] As one of the implementation modes, the second squeezing upper roller is provided with a roller surface sealing unit for limiting the dripping of residual liquid on the second squeezing upper roller.

[0016] The present invention also relates to a method for removing residual liquid on the surface of a plate strip, the method comprising:

[0017] The first squeezing roller is used to perform a roller squeezing treatment on the plate strip;

[0018] Among them, at the outlet side of the first squeezing roller, the airflow at the outlet of the first squeezing roller is guided by the rotation of the first squeezing upper roller itself and the upper air guide plate, so as to improve the situation that the liquid at the side of the edge roller gap flows to the middle roller gap side;

[0019] In addition, compressed air is sprayed toward the outlet of the first squeezing roller to make the air pressure on the middle roller gap side greater than the air pressure on the side of the edge roller gap, so as to prevent the liquid from flowing due to the airflow on the side of the edge roller gap.

[0020] Furthermore, the method further comprises:

[0021] The second squeezing roller is used to perform secondary roller squeezing treatment on the strip.

[0022] The present invention has at least the following beneficial effects:

[0023] In the present invention, the airflow at the outlet of the first squeezing roller is guided by the rotation of the first squeezing upper roller itself and the upper air guide plate, which can improve the situation that the liquid on the side of the edge roller gap flows to the middle roller gap side; based on the effect of the compressed air compensation unit, the air pressure on the middle roller gap side is made greater than the air pressure on the side of the edge roller gap, which can prevent the liquid from flowing due to the airflow on the side of the edge roller gap; therefore, through the interaction of the first squeezing roller, the air guide unit and the compressed air compensation unit, while ensuring the residual liquid removal effect, the compressed air consumption is significantly reduced, the production cost is saved, and the production environment is improved. In addition, the upper air guide plate and the above-mentioned positive pressure compensation effect can effectively prevent the first squeezing upper roller from throwing liquid to the outlet side at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 A schematic diagram of the structure of a device for removing residual liquid on a plate strip surface provided by an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the arrangement structure of the compressed air nozzle on the air guide plate. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figure 1 and Figure 2 The embodiment of the present invention provides a device for removing residual liquid on the surface of a plate strip, comprising a first squeezing roller 1, an air guide unit and a compressed air compensation unit.

[0029] The first squeezing roller 1 comprises a first squeezing upper roller 11 and a first squeezing lower roller 12, and the first squeezing upper roller 11 and / or the first squeezing lower roller 12 are equipped with a lifting drive mechanism;

[0030] The air guide unit includes an upper air guide plate 31, which is arranged at the outlet side of the first squeezing roller 1 and located above the strip running channel, and is used to guide the airflow at the outlet of the first squeezing roller to improve the situation where the liquid on the side of the edge roller gap flows to the middle roller gap side;

[0031] The compressed air compensation unit includes an upper compressed air blowing unit, which includes a plurality of upper compressed air nozzles 41 arranged on the outlet side of the first squeezing roller 1 and located above the plate and strip running channel, and is used to spray compressed air toward the outlet of the first squeezing roller, so that the air pressure on the middle roller gap side is greater than the air pressure on the edge roller gap side.

[0032] The first upper squeeze roller 11 and the first lower squeeze roller 12 are preferably idle rollers, which drive the first upper squeeze roller 11 and the first lower squeeze roller 12 to rotate when the strip 5 is running, so as to squeeze out most of the residual liquid 50 on the surface of the strip.

[0033] Preferably, the first squeezing upper roller 11 and the first squeezing lower roller 12 are both provided with a lifting drive mechanism, which enables the first squeezing upper roller 11 and the first squeezing lower roller 12 to press the surface of the strip to improve the squeezing effect.

[0034] The plate / strip 5 may be a plate / strip material such as strip steel.

[0035] Preferably, the upper air guide plate 31 is fixedly mounted on the roller seat of the first squeezing upper roller 11 and can move with the first squeezing upper roller 11, which not only facilitates the installation of the upper air guide plate 31 but also ensures its airflow guiding effect.

[0036] The upper air guide plate 31 can be a straight plate, and its plate surface is preferably parallel to the vertical direction. Figure 1 The inner plate surface of the upper air guide plate 31 is close to the first squeezing upper roller 11 and a first slit is formed between the two. The bottom end of the upper air guide plate 31 is close to the plate strip running channel and a second slit is formed between the two. The upper air guide plate 31, the first squeezing upper roller 11 and the plate strip 5 can enclose a triangular area. Due to the constraints of the first slit and the second slit, the difficulty of air escaping in the triangular area is increased, ensuring the positive pressure environment in the triangular area, thereby suppressing the liquid on the side of the edge roller gap from flowing to the middle roller gap side.

[0037] When an upper compressed air blowing unit is provided, compressed air is sprayed toward the roller gap side by the upper compressed air blowing unit to ensure a positive pressure environment in the triangular area. On this basis, the inner plate surface of the upper air guide plate 31 is designed as an arc-shaped plate surface, and the curvature of the arc-shaped plate surface is preferably matched with the first squeezing upper roller 11, so that the airflow on the outlet side of the first squeezing roller can be better guided to ensure a stable pressure environment in the triangular area.

[0038] Preferably, the upper compressed air blowing unit is only used to keep the outlet side of the first squeeze upper roller 11 in a positive pressure state, so the upper compressed air nozzle 41 does not blow at a high pressure, but keeps blowing at a low pressure state, which can effectively reduce the compressed air consumption. Moreover, the compressed air injection pressure can be adjusted with the roller surface speed of the first squeeze upper roller 11 to adapt to the airflow state at different speeds, ensure the above-mentioned positive pressure compensation effect, and reduce the compressed air consumption at the same time.

[0039] More preferably, if Figure 1 and Figure 2 The air guide unit further includes a lower air guide plate 32, which is arranged at the outlet side of the first squeezing roller 1 and below the strip running channel, and is used to guide the airflow at the outlet of the first squeezing roller to improve the situation that the liquid on the side of the edge roller gap flows to the middle roller gap. Based on this design, the cleaning effect of the residual liquid 50 on the surface of the strip can be further improved, and the situation that the first squeezing lower roller is thrown to the outlet side at a high speed can be prevented.

[0040] Preferably, the lower air guide plate 32 is fixedly mounted on the roller seat of the first squeeze lower roller 12 and can move with the first squeeze lower roller 12, which not only facilitates the installation of the lower air guide plate 32 but also ensures its airflow guiding effect.

[0041] The configuration structure of the lower air guide plate 32 may refer to the configuration structure of the upper air guide plate 31 , and will not be described in detail here.

[0042] Optionally, the upper compressed air nozzle 41 is arranged on the upper air guide plate 31, and components such as the bracket required for the arrangement of the upper compressed air nozzle 41 can be omitted; wherein, the upper compressed air nozzle 41 can be arranged on the inner plate surface of the upper air guide plate 31, or, the upper air guide plate 31 is set as a hollow plate with a certain thickness, and the upper compressed air nozzle 41 is arranged in the hollow cavity of the upper air guide plate 31 or passes through the inner plate surface of the upper air guide plate 31 from the hollow cavity of the upper air guide plate 31, and blows air toward the roller gap side, which can facilitate the arrangement of the upper compressed air nozzle 41, especially the air supply pipeline can be arranged from the hollow cavity of the upper air guide plate 31.

[0043] Preferably, multiple upper compressed air nozzles 41 are arranged in sequence along the width direction of the plate and strip running channel, including one or more middle nozzles 411 and multiple edge nozzles 412. Optionally, the middle nozzle 411 sprays directly toward the middle roller gap (that is, the projection of the axis of the middle nozzle 411 on the horizontal plane is parallel to the running direction of the plate and strip), and the edge nozzle 412 sprays toward the edge roller gap and the spraying direction is inclined toward the outside of the plate and strip running channel, that is, the projection of the axis of the edge nozzle 412 on the horizontal plane has an angle (greater than 0° and less than 90°) with respect to the running direction of the plate and strip. This can not only prevent the liquid channeling caused by the airflow on the side of the edge roller gap, but also drive the liquid on the surface of the plate and strip to the outside, thereby improving the cleanliness of the surface of the plate and strip.

[0044] More preferably, if Figure 1 and Figure 2 The compressed air compensation unit also includes a lower compressed air blowing unit, which includes a plurality of lower compressed air nozzles 42 arranged on the outlet side of the first squeezing roller 1 and located below the plate and strip running channel, and is used to spray compressed air toward the outlet of the first squeezing roller, so that the air pressure on the middle roller gap side is greater than the air pressure on the side of the edge roller gap, thereby preventing liquid crossflow caused by the airflow on the side of the edge roller gap.

[0045] The arrangement structure of the lower compressed air nozzle 42 may refer to the arrangement structure of the upper compressed air nozzle 41 , and will not be described in detail here.

[0046] Based on the arrangement of the lower compressed air blowing unit, it is obvious that the effect achieved by the above-mentioned upper compressed air blowing unit can also be achieved, which will not be elaborated here.

[0047] Based on the above-mentioned upper compressed air blowing unit and / or lower compressed air blowing unit, while achieving the effect of preventing liquid crossflow caused by the airflow on the side of the edge roller gap, in particular, due to the increased gas pressure at the roller gap outlet, it can better prevent the liquid on the surface of the strip from passing through the roller gap of the first squeezing roller 1, thereby improving the squeezing effect.

[0048] In one embodiment, if Figure 1 The above-mentioned device for removing residual liquid on the surface of the plate strip also includes a second squeezing roller 2. Along the running direction of the plate strip, the second squeezing roller 2 is arranged downstream of the first squeezing roller 1; the second squeezing roller 2 includes a second squeezing upper roller 21 and a second squeezing lower roller 22, and the second squeezing upper roller 21 and / or the second squeezing lower roller 22 are configured with a lifting drive mechanism.

[0049] The second upper squeeze roller 21 and the second lower squeeze roller 22 are preferably idle rollers, which drive the second upper squeeze roller 21 and the second lower squeeze roller 22 to rotate when the strip 5 is running, so as to squeeze out the residual liquid 50 on the surface of the strip.

[0050] Preferably, the second upper squeeze roller 21 and the second lower squeeze roller 22 are both provided with a lifting drive mechanism, so that the second upper squeeze roller 21 and the second lower squeeze roller 22 can press the surface of the strip to improve the squeezing effect.

[0051] Based on the above structure, the first squeezing roller 1 can realize primary squeezing / preliminary squeezing, and the second squeezing roller 2 can realize secondary squeezing, which can effectively improve the cleaning effect of the residual liquid 50 on the surface of the plate strip.

[0052] As a preference, Figure 1 , the roller diameter of the second squeezing roller 2 is smaller than the roller diameter of the first squeezing roller 1, wherein, by utilizing the characteristics of the second squeezing roller 2 having a smaller roller diameter and being easy to deform, the second squeezing upper roller 21 and the second squeezing lower roller 22 can be made to fit more closely with the strip 5, thereby improving the adaptability to the strip shape and ensuring the residual liquid removal effect. It can be seen that based on the above structure, the residual liquid 50 can be removed step by step, which can not only improve the residual liquid removal efficiency, but also improve the residual liquid removal effect.

[0053] Based on the small roller diameter characteristic of the second squeezing roller 2, the second squeezing upper roller 21 and the second squeezing lower roller 22 can be designed to include a working roller and a support roller, and the support roller is used to support the working roller.

[0054] Alternatively, if Figure 1 , a wiper unit is provided at the inlet side of the second squeeze roller 2, which is used to at least scrape off the residual liquid 50 on the upper surface of the plate strip; the wiper unit includes an upper wiper plate 61, which is suitable for contacting the upper surface of the plate strip to scrape off the residual liquid 50 on the upper surface of the plate strip; the lower wiper plate can be set or not according to the actual working conditions. Among them, the bottom wiper part of the upper wiper plate 61 is preferably made of soft wear-resistant parts such as flexible rubber plates to improve the service life and wiper effect; the upper wiper plate 61 is preferably installed on the roller seat of the second squeeze roller 21, and can move with the second squeeze roller 21.

[0055] In one embodiment, if Figure 1 The bottom wiper portion of the upper wiper plate 61 is in the shape of a hollow rod, which ensures that the wiper portion has a certain elastic space and can be closely attached to the surface of the strip within a certain range. The wiping effect is much better than that of the flat wiper portion. It is further preferred to use a round rod wiper portion, which has a longer service life.

[0056] Alternatively, if Figure 1 A water baffle is provided at at least one of the strip inlet side of the second squeezing upper roller 21 , the strip outlet side of the second squeezing upper roller 21 , and the strip outlet side of the second squeezing lower roller 22 .

[0057] The inlet upper water baffle 62 on the strip inlet side of the second squeezing upper roller 21 can reduce the splashing / dripping liquid from being thrown into the roller system of the second squeezing upper roller 21, thereby reducing the situation where the second squeezing upper roller 21 brings residual liquid 50 to the strip surface;

[0058] Among them, the outlet upper water baffle 63 on the strip outlet side of the second squeeze upper roller 21 can reduce the situation where the roller system (especially the support roller) of the second squeeze upper roller 21 drips residual liquid 50 onto the strip surface;

[0059] The outlet lower water baffle 64 at the strip outlet side of the second squeeze lower roller 22 can prevent the second squeeze lower roller 22 from throwing liquid onto the lower surface of the strip.

[0060] Preferably, water retaining plates are provided at the above-mentioned locations to further reduce the residual liquid on the surface of the plate strip.

[0061] Alternatively, if Figure 1 The second squeezed upper roller 21 is provided with a roller surface sealing unit 65, which is used to limit the dripping of residual liquid 50 on the second squeezed upper roller 21, and reduce the situation where the roller system (especially the support roller) of the second squeezed upper roller 21 drips residual liquid 50 onto the surface of the strip. The roller surface sealing unit 65 can be a sealing rubber plate, which is in contact with the working roller of the second squeezed upper roller 21 to achieve the purpose of roller surface sealing and separating the upper and lower spaces. It can also scrape the residual liquid 50 on the surface of the working roller to further improve the residual liquid removal effect; when the sealing rubber plate is installed on the water retaining plate at the corresponding position, the residual liquid 50 scraped by the seal can be diverted to the water retaining plate, and these liquids are guided out and removed by structures such as the water receiving plate.

[0062] Embodiment 2

[0063] The embodiment of the present invention further provides a method for removing residual liquid on the surface of a plate strip, the method comprising:

[0064] The first squeezing roller 1 is used to perform a roller squeezing treatment on the strip 5;

[0065] Among them, at the outlet side of the first squeezing roller 1, the airflow at the outlet of the first squeezing roller is guided by the rotation of the first squeezing upper roller 11 itself and the upper air guide plate 31, so as to improve the situation that the liquid at the side of the edge roller gap flows to the middle roller gap side;

[0066] In addition, compressed air is sprayed toward the outlet of the first squeezing roller to make the air pressure on the middle roller gap side greater than the air pressure on the side of the edge roller gap, so as to prevent the liquid from flowing due to the airflow on the side of the edge roller gap.

[0067] Among them, the cleaning method can be implemented based on the residual liquid cleaning device on the surface of the plate and strip provided in the above-mentioned embodiment 1. The corresponding structure and related measures have been described in the above-mentioned embodiment 1. For example, the method can further include: using a second squeezing roller 2 to perform secondary roller squeezing treatment on the plate and strip 5, etc., which will not be described one by one here.

[0068] In addition, compressed air can be used to purge the surface of the strip at the outlet of the rolling mill as needed, so as to remove a portion of the residual liquid on the surface of the strip in advance upstream of the first squeezing roller 1. This can reduce the burden on the first squeezing roller 1 and the second squeezing roller 2, and improve the effect of removing the residual liquid on the surface of the strip. Based on the arrangement of the first squeezing roller 1, etc., the consumption of purge air at the outlet of the rolling mill can be significantly reduced, thereby improving the flexibility of production control.

[0069] 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 device for removing residual liquid on the surface of a plate strip, It is characterized in that It includes the first squeeze roller, the air guide unit and the compressed air compensation unit. The first squeezing roller comprises a first squeezing upper roller and a first squeezing lower roller, and the first squeezing upper roller and / or the first squeezing lower roller are equipped with a lifting drive mechanism; The air guide unit comprises an upper air guide plate, which is arranged at the outlet side of the first squeezing roller and located above the strip running channel, and is used to guide the airflow at the outlet of the first squeezing roller to improve the situation that the liquid at the edge roll gap side flows to the middle roll gap side; The compressed air compensation unit includes an upper compressed air blowing unit, which includes a plurality of upper compressed air nozzles arranged on the outlet side of the first squeezing roller and located above the plate and strip running channel, and is used to spray compressed air toward the outlet of the first squeezing roller, so that the air pressure on the middle roller gap side is greater than the air pressure on the edge roller gap side.

2. The device for removing residual liquid on the surface of a plate strip as claimed in claim 1, Features: The air guide unit also includes a lower air guide plate, which is arranged on the outlet side of the first squeezing roller and located below the plate and strip running channel, and is used to guide the airflow at the outlet of the first squeezing roller to improve the situation where the liquid on the side of the edge roller gap flows to the middle roller gap side.

3. The device for removing residual liquid on the surface of a plate strip as claimed in claim 1, Features: The compressed air compensation unit also includes a lower compressed air blowing unit, which includes a plurality of lower compressed air nozzles arranged on the outlet side of the first squeezing roller and located below the plate and strip running channel, and is used to spray compressed air toward the outlet of the first squeezing roller, so that the air pressure on the middle roller gap side is greater than the air pressure on the edge roller gap side.

4. The device for removing residual liquid on the surface of a plate strip as claimed in claim 1, Features: It also includes a second squeezing roller, which is arranged downstream of the first squeezing roller along the running direction of the strip; the second squeezing roller includes a second squeezing upper roller and a second squeezing lower roller, and the second squeezing upper roller and / or the second squeezing lower roller are equipped with a lifting drive mechanism.

5. The device for removing residual liquid on the surface of a plate strip as claimed in claim 4, Features: The roller diameter of the second squeezing roller is smaller than the roller diameter of the first squeezing roller.

6. The device for removing residual liquid on the surface of a plate strip as claimed in claim 4, Features: A wiper unit is provided on the inlet side of the second squeeze roller for at least scraping off residual liquid on the upper surface of the plate strip.

7. The device for removing residual liquid on the surface of a plate strip as claimed in claim 4, Features: A water baffle is provided at least one of the strip inlet side of the second squeezing upper roller, the strip outlet side of the second squeezing upper roller, and the strip outlet side of the second squeezing lower roller.

8. The device for removing residual liquid on the surface of a plate strip as claimed in claim 4, Features: The second squeezing upper roller is provided with a roller surface sealing unit for limiting the dripping of residual liquid on the second squeezing upper roller.

9. A method for removing residual liquid from the surface of a plate strip. It is characterized in that The method comprises: The first squeezing roller is used to perform a roller squeezing treatment on the plate strip; Among them, at the outlet side of the first squeezing roller, the airflow at the outlet of the first squeezing roller is guided by the rotation of the first squeezing upper roller itself and the upper air guide plate, so as to improve the situation that the liquid at the side of the edge roller gap flows to the middle roller gap side; In addition, compressed air is sprayed toward the outlet of the first squeezing roller to make the air pressure on the middle roller gap side greater than the air pressure on the side of the edge roller gap, so as to prevent the liquid from flowing due to the airflow on the side of the edge roller gap.

10. The method according to claim 9, It is characterized in that The method further comprises: The second squeezing roller is used to perform secondary roller squeezing treatment on the strip.

Images