Wet wrinkling system

Abstract

The utility model relates to the field of cigarette manufacturing equipment, in particular to a wet wrinkling system. The wet wrinkling system comprises an inclined wire forming assembly, a lower blanket assembly, an upper blanket assembly, a wrinkling assembly and a drying assembly. The upper blanket assembly and the lower blanket assembly are arranged in front of the wrinkling assembly, and the compactness and strength of paper can be enhanced through the adsorption effect and the extrusion effect of the lower blanket and the upper blanket; a wringing roller is arranged in the lower blanket assembly so as to ensure that the wet paper sheets can absorb more moisture after being treated by the lower blanket and the upper blanket; moreover, in the wrinkling process of the scraper, a two-roller and one-pressing mode is adopted and is different from a traditional three-roller and two-pressing method, so that the possibility of paper damage is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of cigarette manufacturing equipment, specifically to a wet creping system. Background Technology

[0002] Cigarette filter rods consist of a filter element and forming paper used to wrap the filter element. Paper filter rods, a commonly used type of cigarette filter rod, are typically made from wood pulp and processed through processes such as embossing and slitting. Paper filter rods possess excellent biodegradability; however, their ability to filter cigarette smoke is closely related to papermaking technology, primarily influenced by parameters such as paper permeability and specific surface area. Paper filter rods manufactured using embossing technology often exhibit unsatisfactory filtration performance. To significantly increase the specific surface area of ​​the paper, paper creping technology has become key to solving this problem. Chinese patent CN210797092U discloses a creping device; see [link to patent]. Figure 4 The three-roller two-pressure creping assembly in its design increases the risk of paper being torn during the creping process; although existing wet creping equipment can achieve uniform creping of paper, the inherent strength of wet paper is low, and it is easy to be scratched and torn by the doctor blade during the creping process. Utility Model Content

[0003] The purpose of this application is to provide a wet creping system to improve the creping effect of paper and reduce the chance of it being torn.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A wet creping system includes a skewer forming component, a lower blanket component, an upper blanket component, a creping component, and a drying component that are sequentially mated together.

[0006] The inclined wire forming assembly includes: an inclined wire comprising a headbox, an inclined wire connected to the headbox, and a vacuum suction box disposed below the inclined wire; the inclined wire is sleeved on a drive roller assembly, and the inclined wire forming assembly is used to form pulp into wet paper sheets;

[0007] The lower blanket assembly includes a lower blanket for conveying wet paper sheets, a crimping roller for guiding the wet paper sheets into the lower blanket, and a squeezing roller for pressing the lower blanket.

[0008] The upper blanket assembly includes an upper blanket and a second roll for guiding the upper blanket to adhere tightly to the lower blanket to carry the wet paper sheet away from the lower blanket;

[0009] The creping assembly includes a lower press roll for extending the wet paper sheet brought by the upper blanket, an upper press roll that is close to the lower press roll across the upper blanket, and a creping blade disposed next to the lower press roll to cooperate with the lower press roll for scraping off and creping the wet paper sheet.

[0010] The drying assembly includes a drying cylinder for drying crepe paper.

[0011] Furthermore, the inclined wire forming assembly also includes: a blowing device for blowing cold air onto the inclined wire, the blowing device being arranged inside the inclined wire on the side where it is joined to the upper blanket; by blowing cold air onto the inclined wire, the adhesion of the wet paper sheet on it is reduced, thereby mitigating the damage to the structure of the wet paper sheet during the joining process.

[0012] Furthermore, the upper blanket assembly also includes a third sub-roller for guiding the upper blanket to adhere closely to the lower press roll; the second and third sub-rollers are located on opposite sides of the press roll in the upper blanket, with the second sub-roller positioned closer to the lower blanket side and the third sub-roller positioned closer to the press roll side.

[0013] Furthermore, the lower blanket assembly includes a hot air device for blowing hot air onto the lower blanket to reduce the adhesion of wet paper sheets. Because the lower blanket has high adhesion to wet paper sheets, especially at high paper machine speeds and when the wet paper sheets are not very strong, paper breaks are easily caused when transferring the wet paper sheets from the lower blanket to the upper blanket. By installing a hot air device on the back of the lower blanket to blow hot air onto it, the adhesion of the lower blanket to the wet paper sheets is reduced, and even desorption is caused, thereby effectively mitigating the problem of paper breaks.

[0014] Furthermore, the lower blanket assembly also includes a clutch roller for guiding the wet paper sheet away from the inclined wire and receiving guidance from the tumbler roller.

[0015] Furthermore, the drying assembly also includes: a support roller that guides the concave surface of the crepe paper to adhere closely to the drying cylinder and flattens the convex surface of the crepe paper, and a cleaning scraper for cleaning the surface of the drying cylinder. The support roller has a certain shaping function, so that the crepe state of the paper can be fixed after creping; the cleaning scraper ensures the cleanliness of the drying cylinder surface, so that the crepe paper always remains in contact with the clean drying cylinder, thereby ensuring the drying and shaping effect.

[0016] Furthermore, the creping assembly also includes a guide roller disposed between the lower press roll and the drying cylinder.

[0017] The lower press roll and the guide roll are designed with a differential speed, with the linear speed of the lower press roll being greater than that of the guide roll.

[0018] The wrinkling amplitude can be adjusted by regulating the speed difference between the guide roller and the lower press roller. After the paper sheet passes through the lower press roller, it then goes to the guide roller. The linear speed of the lower press roller is greater than that of the guide roller. When ΔV increases, the wrinkling amplitude is large, which is the coarse wrinkling mode. When ΔV decreases, the wrinkling amplitude is small, which is the fine wrinkling mode.

[0019] Furthermore, the lower press roll has a larger diameter than the upper press roll, and maintains a 100-300 degree coverage of the central angle of the press roll corresponding to the contact surface between the wet paper sheet and the lower press roll. The large diameter design of the lower press roll can fully extend the wet paper sheet during the creping process, thereby effectively ensuring the quality of the doctor blade creping process.

[0020] Furthermore, in the creping assembly, the point of action of the lower press roller doctor blade is the point of action, the tangent of the lower press roller through the point of action is the baseline, the straight line passing through the point of action and perpendicular to the baseline is the reference line, and the straight line where the creped paper is scraped away from the lower press roller at the point of action is the actual line; the creping doctor blade makes the creped paper scraped away from the lower press roller maintain an angle of α with the uncreped paper at the point of action of the lower press roller doctor blade; the angle of α is the angle between the actual line and the baseline, α=180°-γ-(90°-β);

[0021] Where γ refers to the application angle, which is the angle between the scraper and the baseline; β refers to the cutting edge angle of the scraper, which is the angle removed during the sharpening of the scraper; the wrap angle deviation Δα=α-90° is the angle between the actual line and the reference line;

[0022] The wrap angle α ranges from 90° to 100°.

[0023] Beneficial effects:

[0024] This application relates to a wet creping system, including a wire forming assembly, a lower blanket assembly, an upper blanket assembly, a creping assembly, and a drying assembly. The upper and lower blanket assemblies are configured before the creping assembly. The adsorption and squeezing effects between the lower and upper blankets enhance the density and strength of the paper. The lower blanket assembly is equipped with a squeezing roller to ensure that the wet paper sheet absorbs more moisture after being processed by the lower and upper blankets. Furthermore, during the doctor blade creping process, a two-roller, one-press method is used, which, unlike the traditional three-roller, two-press method, effectively reduces the possibility of paper breakage. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a wet wrinkling system according to this application;

[0027] Figure 2 for Figure 1 A schematic diagram showing the angle of installation of the corrugating scraper;

[0028] Figure 3 A schematic diagram illustrating the wrinkling effect of a wrinkling scraper at different installation angles;

[0029] Figure 4 A schematic diagram of the structure of a two-roller, one-press crease assembly in an existing crease machine;

[0030] Among them, 01, headbox; 02, inclined wire; 03, vacuum suction box; 04, blowing device; 11, lower blanket; 12, press roll; 13, squeezing roll; 14, hot air device; 15, clutch roll; 21, upper blanket; 22, second press roll; 23, third press roll; 30, rubber roller; 31, lower press roll; 32, upper press roll; 33, creping doctor blade; 34, guide roller; 41, drying cylinder; 42, idler roller; 43, cleaning doctor blade. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0035] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0036] The embodiments in this application are written in a progressive manner.

[0037] Please see Figure 1-3 This utility model provides a wet wrinkling system, including a slanted mesh forming component, a lower blanket component, an upper blanket component, a wrinkling component, and a drying component that are connected in sequence.

[0038] The inclined wire forming assembly includes: an inclined wire comprising a headbox, an inclined wire connected to the headbox, and a vacuum suction box disposed below the inclined wire; the inclined wire is sleeved on a drive roller assembly, and the inclined wire forming assembly is used to form pulp into wet paper sheets;

[0039] The lower blanket assembly includes a lower blanket for conveying wet paper sheets, a crimping roller for guiding the wet paper sheets into the lower blanket, and a squeezing roller for pressing the lower blanket.

[0040] The upper blanket assembly includes an upper blanket and a second roll for guiding the upper blanket to adhere tightly to the lower blanket to carry the wet paper sheet away from the lower blanket;

[0041] The creping assembly includes a lower press roll for extending the wet paper sheet brought by the upper blanket, an upper press roll that is close to the lower press roll across the upper blanket, and a creping blade disposed next to the lower press roll to cooperate with the lower press roll for scraping off and creping the wet paper sheet.

[0042] The drying assembly includes a drying cylinder for drying crepe paper.

[0043] This application discloses a wet creping system, which includes an upper blanket assembly and a lower blanket assembly before the creping assembly. The adsorption and squeezing effects of the lower and upper blankets enhance the density and strength of the paper. The lower blanket assembly is equipped with a squeezing roller to ensure that the wet paper can absorb more moisture after being processed by the lower and upper blankets. Furthermore, the creping process using a doctor blade employs a two-roller, one-press method, which, unlike the traditional three-roller, two-press method, effectively reduces the possibility of paper breakage.

[0044] Figure 4This is a schematic diagram of a three-roll, two-press creping device in the prior art. It can be understood that the creping assembly of this device includes a rubber roller 30, a lower press roller 31, and an upper press roller 32. The rubber roller 30 is wound with a lower blanket 11, the lower press roller 31 is wound with an upper blanket 21, and the upper press roller 32 is typically a stone roller. The wet paper sheet enters from the lower blanket (at the rubber roller), is then guided through the upper blanket (at the lower press roller 31) into the stone roller, and then, under the action of the creping doctor blade 33, the paper sheet is creped. It is then guided into the drying cylinder 41 by the guide roller 34. Because it simultaneously has a rubber roller 30, a lower press roller 31, and an upper press roller 32, and a first compression occurs between the rubber roller 30 and the lower press roller 31, and a second compression occurs between the lower press roller 31 and the upper press roller 32, it is named a three-roll, two-press device. The disadvantage of three-roller two-press is that the continuous S-shaped winding and squeezing before the wet paper is wrinkled greatly increases the resistance during travel, and the tightness and strength of the wet paper are not high enough, so it is easy to break the paper.

[0045] Furthermore, in the wet wrinkling system of this application:

[0046] The inclined wire forming assembly is used to form the pulp into a wet paper sheet, such as... Figure 1 As shown, it includes a headbox 01, an inclined wire 02 positioned below the headbox weir, and a vacuum suction box 03 positioned below the inclined wire. The headbox 01 is used to evenly spread the pulp. The inclined wire 02 rotates continuously, and a section of its surface is inclined upwards. This section of the inclined wire receives the pulp that flows evenly from the headbox weir, thus forming the initial wet sheet on the inclined wire 02. The initial wet sheet has a high moisture content, so the vacuum suction box 03 is positioned below the inclined wire 02 to absorb a large amount of moisture during the conveying process of the wet sheet, making the initial wet sheet gradually become compact.

[0047] The lower blanket assembly is used to receive the gradually tightening wet paper sheet from the inclined wire 02, further absorb the pulp from the wet paper sheet, and convey it away. For example... Figure 1As shown, it includes a lower blanket 11, a base roll 12, a squeeze roll 13, a clutch roll 15, and various guide rolls (not labeled). The base roll 12 and various guide rolls spread the lower blanket 11 and make it rotate cyclically. The squeeze rolls 13 are arranged in pairs and squeeze the lower blanket 11, which has absorbed pulp, to dry it, so that the lower blanket 11 can continue to absorb pulp. Therefore, the squeeze rolls 13 are positioned before the lower blanket 11 receives the wet paper sheet and after the wet paper sheet is sent away. The clutch roll 15 is located between the lower blanket 11 and the inclined wire 02, guiding the lower blanket 11 to press lightly against the wire surface to remove the wet paper sheet from the wire surface. The inclined wire forming assembly also includes a blowing device 04 for blowing cold air onto the inclined wire 02 to reduce the adhesion of the wet paper sheet, making it easier for the wet paper sheet to be received by the lower blanket 11. The lower roller 12 not only opens the lower blanket 11, but also guides the wet paper sheet into the lower blanket 11 from the clutch roller 15.

[0048] The upper blanket assembly receives the wet paper sheet from the lower blanket 11, further absorbs the pulp from the wet paper sheet, and then sends it to the creping assembly. For example... Figure 1 As shown, it includes an upper blanket 21 and a second roll 22. The second roll 22 is used to guide the upper blanket 21 to adhere tightly to the lower blanket 11 so as to carry the wet paper sheet away from the lower blanket 11. The lower blanket assembly also includes a hot air device 14 for blowing hot air onto the lower blanket 11 to reduce the adhesion of the wet paper sheet, so as to facilitate the reception of the wet paper sheet by the upper blanket 21.

[0049] A crease assembly is used to crease a wet sheet of paper to create horizontal lines on the paper. For example... Figure 1 As shown, it includes a lower press roll 31, an upper press roll 32, and a crease cutter 33. The lower press roll 31 is used to spread out the wet paper sheet brought by the upper blanket 21 and form a work surface for crease operation; it is usually a smooth stainless steel roll. The upper press roll 32 is close to the lower press roll 31 through the upper blanket 21, and works with the lower press roll 31 to fix the wet paper sheet during its movement, while controlling the moisture content of the wet paper sheet. When the moisture content of the wet paper sheet is too high, the upper press roll 32 and the lower press roll 31 will squeeze out the excess pulp. The crease cutter 33 is the main working component, located next to the lower press roll 31, and works with the lower press roll 31 to scrape off and crease the wet paper sheet, creating horizontal lines on the wet paper sheet. The aforementioned upper blanket assembly also includes a third sub-roller 23, used to guide the upper blanket 21 to adhere closely to the lower press roll 31, further stabilizing the traveling wet paper sheet and facilitating the action of the creasing blade 33 on the wet paper sheet. The lower press roll has a larger diameter than the upper press roll, maintaining a 100-300 degree coverage of the press roll's central angle corresponding to the contact surface between the wet paper sheet and the lower press roll. The large diameter design of the lower press roll allows the wet paper sheet to be fully extended during the creasing process, thereby effectively ensuring the quality of the creasing treatment by the blade.

[0050] The drying unit is used to dry the crepe paper and simultaneously fix the wrinkles on the paper. For example... Figure 1 As shown, the creping assembly includes a drying cylinder 41, a support roller 42, and a cleaning blade 43. The drying cylinder 41 is used to dry the creped paper. The support roller 42 guides the concave surface of the creped paper to press against the drying cylinder 41 and flattens the convex surface of the creped paper. The cleaning blade 43 is used to clean the surface of the drying cylinder. The creping assembly also includes a guide roller 34, which works in conjunction with the lower press roller 31 to adjust the creping process, specifically through a speed difference. The linear speed of the lower press roller is greater than that of the guide roller. When ΔV increases, the creping amplitude is larger, resulting in a coarse creping mode; when ΔV decreases, the creping amplitude is smaller, resulting in a fine creping mode. Simultaneously, the guide roller 34 also serves to transfer the creped paper to the drying cylinder 41. Therefore, the guide roller 34 is positioned between the lower press roller 31 and the drying cylinder 41, and close to the drying cylinder 41, so that the creped paper is guided to the surface of the drying cylinder 41 at a better angle.

[0051] like Figure 2 The diagram shows a schematic of the lower press roller 31 and creping doctor blade 33 of the creping assembly. The creping doctor blade 33 maintains an angle α between the creped paper scraped off the lower press roller 31 and the uncreped paper at the point of action of the doctor blade. Let the point of action of the doctor blade on the lower press roller 31 be the point of action, let the tangent of the lower press roller 31 passing through the point of action be the baseline, let the straight line passing through the point of action and perpendicular to the baseline be the reference line, and let the straight line where the creped paper scraped off the lower press roller 31 at the point of action is the actual line. Then, the angle α is the angle between the actual line and the baseline, α = 180° - γ - (90° - β); where γ is the applied angle, i.e., the angle between the doctor blade and the baseline; β is the cutting angle of the doctor blade, i.e., the angle removed by grinding when the doctor blade is sharpened; the angle deviation Δα = α - 90°, i.e., the angle between the actual line and the reference line; α > 90°. The application angle γ is usually preset and adjustable, while the scraper blade angle β is usually a fixed value. Therefore, the size of the wrap angle α can be adjusted by adjusting the application angle γ. The smaller γ is, the larger the wrap angle α is, and the smaller the wrinkling amplitude; the smaller the wrap angle α is, the larger the wrinkling amplitude. The size of the wrap angle α affects the amount of wrinkling, so the wrinkling effect can be adjusted by adjusting the wrap angle α. In this application, the wrap angle α is set to 90°-100°. This specific angle range of wrap angle α setting provides excellent wrinkling effect for wet paper sheets. Figure 3 The morphological diagrams of the creased paper with wrap angles α of 95° and 77° also show that the creased effect is better at 95° than at 77° within a specific angle range of this application.

[0052] It should be noted that the water suction box is an existing negative pressure water suction box, including a water suction box body and a negative pressure source device connected to the water suction box body; the blowing device and the hot air device are also existing technology devices. The blowing device includes a blowing box and an air source connected to the blowing box; the hot air device includes a hot air box and a hot air source connected to the hot air box. Those skilled in the art are familiar with the above-mentioned existing technology structures and will not elaborate further.

[0053] The wet creping system disclosed in this application includes a wire forming assembly, a lower blanket assembly, an upper blanket assembly, a creping assembly, and a drying assembly connected in sequence. A water absorption box is installed in the wire to absorb moisture, and a blowing device is also provided to reduce the adhesion of the wet paper sheet by spraying cold air onto the wire, thereby mitigating damage to the wet paper sheet structure during the forming process. The upper blanket assembly and the lower blanket assembly are positioned in front of the creping assembly, utilizing the adsorption and compression effects of the lower and upper blankets to enhance the paper's density and strength. A water-squeezing roller is installed in the lower blanket assembly to ensure that the lower blanket remains in a water-absorbing state, thereby improving the dewatering efficiency of the wet paper sheet. During the doctor blade creping process, an innovative two-roller, one-press method is adopted, differing from the traditional three-roller, two-press method, effectively reducing the risk of paper sheet breakage. Furthermore, a hot air device is installed on the back of the lower blanket to blow hot air onto the lower blanket, reducing... The lower blanket's adhesion to the wet paper sheet, and even its ability to detach it, significantly reduces the probability of paper breakage. The lower press roll features a large-diameter design, ensuring the wet paper sheet can fully extend during creping and effectively guaranteeing the quality of the doctor blade creping process. The drying assembly includes a support roller, which works in conjunction with the drying cylinder to fix the creases, ensuring the paper sheet's wrinkled surface remains consistent after creping. The cleaning doctor blade ensures the dry cylinder surface remains clean, keeping the creped paper in constant contact with the clean cylinder, thus guaranteeing effective drying and setting. The speed difference design between the guide roller and the lower press roll allows for adjustment of the creping amplitude. After passing through the lower press roll, the paper sheet is then conveyed to the guide roller. When the linear speed of the lower press roll is greater than that of the guide roller, the creping amplitude increases, suitable for coarse creping mode; conversely, when the speed difference decreases, the creping amplitude decreases, suitable for fine creping mode.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wet wrinkling system, characterized in that, It includes a slanted mesh forming component, a lower blanket component, an upper blanket component, a wrinkling component, and a drying component that are connected and fitted together in sequence; The inclined wire forming assembly includes: an inclined wire comprising a headbox, an inclined wire connected to the headbox, and a vacuum suction box disposed below the inclined wire; the inclined wire is sleeved on a drive roller assembly, and the inclined wire forming assembly is used to form pulp into wet paper sheets; The lower blanket assembly includes a lower blanket for conveying wet paper sheets, a crimping roller for guiding the wet paper sheets into the lower blanket, and a squeezing roller for pressing the lower blanket. The upper blanket assembly includes an upper blanket and a second roll for guiding the upper blanket to adhere tightly to the lower blanket to carry the wet paper sheet away from the lower blanket; The creping assembly includes a lower press roll for extending the wet paper sheet brought by the upper blanket, an upper press roll that is close to the lower press roll across the upper blanket, and a creping blade disposed next to the lower press roll to cooperate with the lower press roll for scraping off and creping the wet paper sheet. The drying assembly includes a drying cylinder for drying crepe paper.

2. The wet wrinkling system according to claim 1, characterized in that, The inclined mesh forming assembly further includes: a blowing device for blowing cold air onto the inclined mesh, the blowing device being arranged on the inner side of the inclined mesh on the side connected to the upper blanket.

3. The wet wrinkling system according to claim 1 or 2, characterized in that, The upper blanket assembly also includes a third sub-roller for guiding the upper blanket to adhere closely to the lower press roll; the second and third sub-rollers are located on opposite sides of the press roll in the upper blanket, with the second sub-roller positioned closer to the lower blanket side and the third sub-roller positioned closer to the press roll side.

4. The wet wrinkling system according to claim 3, characterized in that, The undersheet assembly includes a hot air device for blowing hot air onto the undersheet to reduce the adhesion of wet paper sheets.

5. The wet wrinkling system according to claim 4, characterized in that, The described undersheet assembly also includes a clutch roller for guiding the wet paper sheet away from the inclined wire and receiving guidance from the tumbler roller.

6. The wet wrinkling system according to any one of claims 1-2 and 4-5, characterized in that, The drying assembly further includes: a roller that guides the concave surface of the crepe paper to fit tightly against the drying cylinder and flattens the convex surface of the crepe paper, and a cleaning scraper for cleaning the surface of the drying cylinder.

7. The wet wrinkling system according to claim 6, characterized in that, The creping assembly further includes a guide roller disposed between the lower press roller and the drying cylinder.

8. The wet wrinkling system according to claim 7, characterized in that, The lower press roll and the guide roll are designed with a differential speed, with the linear speed of the lower press roll being greater than that of the guide roll.

9. The wet wrinkling system according to any one of claims 1-2, 4-5, and 7-8, characterized in that, The lower press roll has a larger diameter than the upper press roll, and maintains a 100-300 degree coverage between the central angle of the press roll and the contact surface of the wet paper sheet with the lower press roll.

10. The wet wrinkling system according to claim 9, characterized in that, In the creping assembly, the point of action of the lower press roller doctor blade is the point of action, the tangent of the lower press roller through the point of action is the baseline, the straight line passing through the point of action and perpendicular to the baseline is the reference line, and the straight line where the creped paper is scraped away from the lower press roller at the point of action is the actual line. The creping doctor blade keeps the creped paper scraped away from the lower press roller and the uncreped paper at the point of action of the lower press roller doctor blade at an angle of α. The angle of α is the angle between the actual line and the baseline, α = 180° - γ - (90° - β). Where γ refers to the application angle, which is the angle between the scraper and the baseline; β refers to the cutting edge angle of the scraper, which is the angle removed during the sharpening of the scraper; the wrap angle deviation Δα=α-90° is the angle between the actual line and the reference line; The wrap angle α ranges from 90° to 100°.

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