Peeling assisting mechanism and tobacco sheet peeling apparatus using the thick stock method

Abstract

The application relates to the technical field of tobacco production equipment, in particular to a stripping auxiliary mechanism and a thick slurry method tobacco sheet stripping device. The application comprises a compression roller, a guide roller, an unfolding roller and a transmission roller. The compression roller is used for compressing and holding tobacco sheets on a conveying steel belt of a first drying mechanism and acts on a first side of the tobacco sheets. The guide roller is located above the compression roller and is used for receiving the tobacco sheets output from the compression roller and acts on a second side of the tobacco sheets. The unfolding roller acts on the first side of the tobacco sheets and unfolds and flattens the wrinkles on the tobacco sheets. The transmission roller acts on the second side of the tobacco sheets and is used for conveying the unfolded and flattened tobacco sheets to a second drying mechanism. The unfolding roller is located between the guide roller and the transmission roller, and the first side and the second side are two opposite sides of the tobacco sheets.

Description

Technical Field

[0001] This application relates to the field of tobacco production equipment technology, and more specifically, to a stripping auxiliary mechanism and a slurry-based tobacco sheet stripping device. Background Technology

[0002] In the tobacco production sector, the slurry-based sheet forming process is a mature production technology widely used in the industrial production of various paper products (tobacco leaves). This technology involves uniformly spreading a fiber suspension on the surface of a forming wire, followed by systematic dehydration, mechanical pressing, and hot air drying to ultimately form tobacco sheets that meet specific specifications.

[0003] However, existing technologies have problems such as tobacco sheet curling during the drying process and easy damage to the tobacco sheet during peeling. Utility Model Content

[0004] The purpose of this application is to provide a peeling auxiliary mechanism and a slurry-based tobacco sheet peeling device, which can smooth out the curled edges and potential wrinkles of the tobacco sheet, making the peeling more stable and avoiding damage to the tobacco sheet during peeling.

[0005] The embodiments of this application can be implemented as follows: In a first aspect, this application provides a stripping auxiliary mechanism, comprising: The pressure roller is used to press the tobacco sheet on the conveyor belt of the first drying mechanism and acts on the first side of the tobacco sheet; The guide roller is located above the pressure roller and is used to receive the tobacco sheet output from the pressure roller. The guide roller acts on the second side of the tobacco sheet. The stretching roller acts on the first side of the tobacco sheet and smooths out the wrinkles on the tobacco sheet. The drive roller acts on the second side of the tobacco sheet and is used to transport the flattened tobacco sheet to the second drying mechanism. The stretching roller is located between the guide roller and the drive roller, with the first and second sides being the two opposite sides of the tobacco sheet.

[0006] In an optional embodiment, the peeling auxiliary mechanism further includes a scraper located below the pressure roller, which is used to peel the ends of the tobacco sheet from the conveyor belt during the conveying of the tobacco sheet in the first drying mechanism.

[0007] In an optional implementation, the surface of the stretching roller is threaded or arc-shaped.

[0008] In an optional embodiment, the outer peripheral wall of the pressure roller is covered with a first adhesive layer.

[0009] In an optional embodiment, the outer peripheral wall of the drive roller is wrapped with a second adhesive layer.

[0010] In an optional embodiment, the first adhesive layer comprises at least one of silicone rubber and polyurethane, and / or the second adhesive layer comprises at least one of silicone rubber and polyurethane.

[0011] In an optional embodiment, the stripping auxiliary mechanism further includes a cylinder connected to the pressure roller; the cylinder is used to move the pressure roller closer to or away from the tobacco sheet located on the conveyor belt.

[0012] In an alternative embodiment, the guide roller comprises a metal roller.

[0013] Secondly, this application provides a slurry-based tobacco sheet peeling apparatus, comprising: The first drying unit, the second drying unit, and the aforementioned peeling auxiliary unit, wherein the peeling auxiliary unit is used to peel the tobacco sheet located on the first drying unit and convey it to the second drying unit.

[0014] In an optional embodiment, the first drying mechanism includes a body and a conveyor steel belt. The conveyor steel belt is wound around the body and is used to convey tobacco sheets. The pressure roller and the scraper are located on one side of the body and are arranged sequentially along the conveying direction of the conveyor steel belt.

[0015] The beneficial effects of the peeling auxiliary mechanism and the slurry-based tobacco sheet peeling device provided in this application embodiment include: This peeling auxiliary mechanism, through the coordinated action of pressure rollers, guide rollers, stretching rollers, and drive rollers, confines the peeling point of the tobacco sheet behind the pressure roller, thus solving the problem of unstable peeling points in existing technologies. It utilizes the tension generated by the height difference between the pressure roller and the guide roller to peel the tobacco sheet from the conveyor belt, replacing the hard contact of the scraper in existing technologies and preventing damage to the tobacco sheet. This peeling auxiliary mechanism also uses stretching rollers to eliminate curling at the edges of the tobacco sheet and smooth out potential wrinkles, preventing gaps or breaks in subsequent processing. The pressure roller and stretching roller act on the first side of the tobacco sheet, while the guide roller and drive roller act on the second side; that is, two adjacent rollers act on both sides of the tobacco sheet respectively, keeping the tobacco sheet in a taut state at all times, thereby preventing adhesion and improving product quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the slurry-based tobacco sheet peeling device provided in an embodiment of this application.

[0018] Explanation of reference numerals in the attached drawings: 1-Scraper; 2-Pressure roller; 3-Guide roller; 4-Expanding roller; 5-Drive roller; 6-Tobacco sheet; 61-First side; 62-Second side; 7-First drying mechanism; 71-Conveyor steel belt; 8-Second drying mechanism. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does 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, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0025] During the tobacco sheet forming stage, the fiber suspension in the edge region undergoes directional flow under the combined effects of surface tension and gravity, resulting in a significantly lower mass of pulp per unit area (quantity) compared to the central region. This quantitative gradient distribution is further exacerbated in subsequent drying processes: due to the lower pulp load in the edge region, its moisture evaporation rate is significantly higher than that of the main body under isothermal drying conditions, eventually causing the dryness difference between the edge and main body regions to reach a critical value. When the dryness difference exceeds the material's tolerance limit, the edge region will undergo plastic deformation due to the internal stress generated by non-uniform shrinkage. This can result in edge warping or, in severe cases, interlayer delamination forming obvious edge curling defects.

[0026] Of particular note is that this phenomenon is more pronounced when producing low-basis-weight products (≤140gsm). Because low-basis-weight products have a thinner fiber deposition layer, the change in the basis weight gradient at the edges is more sensitive to the structural integrity of the product. Actual production data shows that edge curling defects not only severely damage the product's appearance but also have a systematic impact on subsequent processing: First, the heterogeneity in mechanical properties between the curled area and the main body leads to an imbalance in the tension field distribution, easily forming stress concentration zones during subsequent continuous processing such as slitting and rewinding; second, due to the significant non-uniformity in thickness and basis weight parameters at the curled area, it is highly susceptible to developing into a stress fracture source when subjected to mechanical traction, ultimately leading to major production accidents such as fracture.

[0027] Based on the above issues, please refer to Figure 1 This application provides a slurry-based tobacco sheet peeling device, which includes a first drying mechanism 7, a second drying mechanism 8, and a peeling auxiliary mechanism. The peeling auxiliary mechanism is used to peel the tobacco sheet 6 located on the first drying mechanism 7 and transport it to the second drying mechanism 8.

[0028] Specifically, the first drying mechanism 7 includes a body and a conveyor steel belt 71, which is wound around the body and used to convey tobacco sheets 6. The peeling auxiliary mechanism includes a pressure roller 2, a guide roller 3, and a stretching roller 4, with the pressure roller 2 located on one side of the body. In some embodiments, the body of the first drying mechanism 7 can be two or more breast rollers. Here, "the pressure roller 2 is located on one side of the body" means that the two or more breast rollers are considered as a whole, and the pressure roller 2 is located on one side of this whole, such as the left or right side.

[0029] In some embodiments, the first drying mechanism 7 includes a body consisting of two breast rollers. One breast roller is a drive roller driven by a motor to provide forward power for the entire conveyor belt 71. The other is a tension roller that can be moved by hydraulic or mechanical means to adjust the tension of the conveyor belt 71, ensuring that the conveyor belt 71 runs smoothly and stably without slipping or deviating.

[0030] It should be noted that the pressure roller 2 is used to press the tobacco sheet 6 on the conveyor steel belt 71 of the first drying mechanism 7, and acts on the first side 61 of the tobacco sheet 6; the guide roller 3 is used to receive the tobacco sheet 6 output from the pressure roller 2, and acts on the second side 62 of the tobacco sheet 6; the stretching roller 4 acts on the first side 61 of the tobacco sheet 6 and smooths out the wrinkles on the tobacco sheet 6; wherein, the first side 61 and the second side 62 are the two opposite sides of the tobacco sheet 6. In this embodiment, the tobacco sheet 6 passes sequentially through the first drying mechanism 7, the pressure roller 2, the guide roller 3, the stretching roller 4, and the second drying mechanism 8.

[0031] Because the body of the first drying mechanism 7 in this embodiment rotates clockwise, the conveyor belt 71 moves to the right. Therefore, the stripping auxiliary mechanism can... Figure 1 The first drying mechanism 7 is shown to the right of the first drying mechanism 7; of course, in other embodiments, if the body of the first drying mechanism 7 rotates counterclockwise, the conveyor belt 71 moves to the left and the stripping auxiliary mechanism can be located on the left side of the first drying mechanism 7 (not shown).

[0032] Understandably, in this embodiment, the tobacco sheet 6 is pressed by the pressure roller 2, thereby forcibly limiting the peeling point of the tobacco sheet 6 to the area behind the contact zone between the pressure roller 2 and the conveyor steel belt 71, thus avoiding the problem of the tobacco sheet 6 being scratched due to the instability of the peeling point.

[0033] The guide roller 3 is higher than the pressure roller 2, meaning it is positioned above the pressure roller 2. This creates a height difference between the guide roller 3 and the pressure roller 2, which generates tension to peel the tobacco sheet 6 from the conveyor belt 71, replacing the hard contact of the scraper in existing technology. The higher height of the guide roller 3 ensures that the tobacco sheet 6 moves upwards from the pressure roller 2 to the guide roller 3. The pressure roller 2 and guide roller 3 act on opposite sides of the tobacco sheet 6, creating a taut state between the two rollers, thus generating tension. This ensures the tobacco sheet 6 can smoothly detach from the conveyor belt 71, making the peeling process more stable and preventing damage to the tobacco sheet 6 during peeling.

[0034] The stretching roller 4 is located behind the guide roller 3, thereby receiving the tobacco sheet 6 conveyed by the guide roller 3. In this embodiment, the second drying mechanism 8 is located below the first drying mechanism 7, and the stretching roller 4 is located below the guide roller 3 so that the peeled tobacco sheet 6 can be conveyed to the second drying mechanism 8. In other embodiments, if the second drying mechanism 8 is located above the first drying mechanism 7, then the stretching roller 4 is located above the guide roller 3.

[0035] The stretching roller 4 and guide roller 3 act on opposite sides of the tobacco sheet 6, ensuring that the tobacco sheet 6 remains taut as it moves from the guide roller 3 to the stretching roller 4, preventing sticking. As the tobacco sheet 6 passes through the stretching roller 4, the tension generated by the combined action of the stretching roller 4 and guide roller 3 stretches the tobacco sheet 6, eliminating curling and smoothing out potential wrinkles.

[0036] Specifically, the surface of the stretching roller 4 is threaded or arc-shaped, thereby generating tension through a special surface. Taking the arc-shaped surface as an example, the middle of the roller surface is high and the two ends are low. The contact area between the rolled edge of the tobacco sheet 6 and the roller surface is smaller than that of the middle part, so that the edge of the tobacco sheet 6 is stretched and flattened under the action of tension, thereby eliminating the rolled edge.

[0037] According to the above, the peeling auxiliary mechanism also includes a transmission roller 5, which is used to transport the flattened tobacco sheet 6 to the second drying mechanism 8; the transmission roller 5 acts on the second side 62 of the tobacco sheet 6.

[0038] Understandably, in this embodiment, the tobacco sheet 6 sequentially passes through the first drying mechanism 7, pressure roller 2, guide roller 3, spreading roller 4, and drive roller 5, before moving to the second drying mechanism 8. Therefore, the drive roller 5 is closer to the second drying mechanism 8 than the spreading roller 4; since the second drying mechanism 8 is located below the first drying mechanism 7 in this embodiment, the drive roller 5 is located below the spreading roller 4. In other embodiments, if the second drying mechanism 8 is located above the first drying mechanism 7, then the drive roller 5 is located above the spreading roller 4.

[0039] The stretching roller 4 and the drive roller 5 act on opposite sides of the tobacco sheet 6, so that the tobacco sheet 6 is kept taut during its movement between the stretching roller 4 and the drive roller 5, in order to avoid sticking and affecting the quality of the product.

[0040] The rotational speed of the drive roller 5 is greater than the rotational speed of the conveyor belt 71 in the first drying mechanism 7, meaning the running speed of the drive roller 5 is greater than the running speed of the conveyor belt 71. The linear velocity of the drive roller 5 is also greater than the linear velocity of the conveyor belt 71 in the first drying mechanism 7. This creates a speed difference between the drive roller 5 and the conveyor belt 71, which generates a forward dynamic traction force when the drive roller 5 contacts and drives the tobacco sheet 6. Because the outer peripheral wall of the drive roller 5 is covered with a second adhesive layer, this material has a high coefficient of friction and appropriate elasticity, effectively increasing the friction between the drive roller 5 and the tobacco sheet 6 during contact, preventing relative slippage, and ensuring efficient transmission of traction force.

[0041] This traction force, on the one hand, works in conjunction with the peeling tension generated by the height difference between the pressure roller 2 and the guide roller 3, acting together on the tobacco sheet 6 to help it detach smoothly and completely from the conveyor belt 71, avoiding tearing or damage due to excessive local stress; on the other hand, after peeling, it continues to perform the conveying function, stably transporting the flattened tobacco sheet 6 to the second drying mechanism 8. This embodiment achieves dynamic coordination of peeling and conveying through the speed zone design and the synergy of high-friction contact surfaces, improving the reliability of equipment operation and product quality.

[0042] Furthermore, the peeling auxiliary mechanism also includes a scraper 1, which is located below the pressure roller 2. The scraper 1 is used to peel the ends of the tobacco sheet 6 from the conveying steel belt 71 during the conveying of the tobacco sheet 6 in the first drying mechanism 7.

[0043] Specifically, during the process of conveying the tobacco sheet 6 by the conveying steel belt 71, the pressure roller 2 first presses the tobacco sheet 6, and then the scraper 1 peels a small corner (i.e. the end) of the tobacco sheet 6 from the conveying steel belt 71. The corner peeled off by the scraper 1 is received by the guide roller 3. Then the guide roller 3 and the pressure roller 2 cooperate to form a tension through the height difference between the two, and the main body of the tobacco sheet 6 is peeled off by the tension.

[0044] It is understood that in this embodiment, the scraper 1 is only used to peel off the end of the tobacco sheet 6 in the initial stage, and plays an auxiliary guiding role. The main peeling process is completed by the tension between the pressure roller 2 and the guide roller 3. Therefore, the scraper 1 is an auxiliary component and not the main peeling execution component.

[0045] It should be noted that the pressure roller 2 and the scraper 1 are both located on one side of the main body and are arranged sequentially along the conveying direction of the conveying steel belt 71, so that the tobacco sheet 6 can be pressed by the pressure roller 2 first, and then the ends, i.e. the small corners, of the tobacco sheet 6 are peeled off from the conveying steel belt 71. Therefore, in this embodiment, the tobacco sheet 6 passes sequentially through the first drying mechanism 7, the pressure roller 2, the scraper 1, the guide roller 3, the spreading roller 4, the transmission roller 5, and the second drying mechanism 8.

[0046] In conjunction with the above, in this embodiment, the outer peripheral wall of the pressure roller 2 is covered with a first adhesive layer. Furthermore, it is understood that during the contact process between the pressure roller 2 and the tobacco sheet 6, the first adhesive layer allows for flexible contact between the tobacco sheet 6 and the pressure roller 2, preventing damage to the tobacco sheet 6 during pressure application. It should be noted that the contact area between the drive roller 5 and the tobacco sheet 6 is relatively large to further enhance friction.

[0047] In some embodiments, the first adhesive layer comprises at least one of silicone rubber and polyurethane. In other embodiments, the second adhesive layer comprises at least one of silicone rubber and polyurethane.

[0048] In this embodiment, the guide roller 3 is made of metal, i.e., a metal roller. It is understood that in this embodiment, the guide roller 3 needs to work in conjunction with the pressure roller 2 to form a stable tension that causes the tobacco sheet 6 to peel off. The metal material possesses high strength to withstand the tension generated during the movement of the tobacco sheet 6, preventing deformation of the guide roller 3 that could cause fluctuations in tension.

[0049] Furthermore, the peeling auxiliary mechanism provided in this embodiment also includes a cylinder connected to the pressure roller 2; the cylinder is used to drive the pressure roller 2 closer to or further away from the tobacco sheet 6 located on the conveyor belt 71. It is understood that this embodiment can utilize the cylinder to adjust the pressure applied by the pressure roller 2 to the tobacco sheet 6, driving the pressure roller 2 to move while avoiding excessive pressure that could damage the tobacco sheet 6. It should be noted that during the process of the cylinder driving the pressure roller 2, the height of the pressure roller 2 is always lower than the height of the guide roller 3.

[0050] In summary, this embodiment utilizes the synergistic action of pressure roller 2, guide roller 3, stretching roller 4, and drive roller 5 to limit the peeling point of the tobacco sheet 6 to behind pressure roller 2, thus solving the problem of unstable peeling point in the prior art. Furthermore, the tension generated by the height difference between pressure roller 2 and guide roller 3 is used to peel the tobacco sheet 6 off the conveyor belt 71, replacing the hard contact of the scraper in the prior art and preventing damage to the tobacco sheet 6. This embodiment also uses stretching roller 4 to eliminate edge curling of the tobacco sheet 6 and smooth out potential wrinkles, preventing gaps or breakage during subsequent processing. Pressure roller 2 and stretching roller 4 act on the first side of the tobacco sheet 6, while guide roller 3 and drive roller 5 act on the second side of the tobacco sheet 6. That is, two adjacent rollers act on both sides of the tobacco sheet 6, keeping the tobacco sheet 6 in a taut state at all times, thereby preventing adhesion and improving product quality.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A peeling auxiliary mechanism, characterized in that, include: A pressure roller is used to press the tobacco sheet on the conveyor belt of the first drying mechanism and to act on a first side of the tobacco sheet. A guide roller, located above the pressure roller, is used to receive the tobacco sheet output from the pressure roller, and the guide roller acts on a second side of the tobacco sheet; A stretching roller acts on a first side of the tobacco sheet and smooths out the wrinkles on the tobacco sheet; A drive roller acts on the second side of the tobacco sheet, and the drive roller is used to transport the flattened tobacco sheet to the second drying mechanism; The stretching roller is located between the guide roller and the transmission roller, and the first side and the second side are the two opposite sides of the tobacco sheet.

2. The peeling auxiliary mechanism according to claim 1, characterized in that, The peeling auxiliary mechanism also includes a scraper located below the pressure roller, which is used to peel the ends of the tobacco sheet from the conveyor belt during the conveying of the tobacco sheet in the first drying mechanism.

3. The peeling auxiliary mechanism according to claim 1, characterized in that, The surface of the stretching roller is threaded or arc-shaped.

4. The peeling auxiliary mechanism according to claim 1, characterized in that, The outer peripheral wall of the pressure roller is covered with a first adhesive layer.

5. The peeling auxiliary mechanism according to claim 4, characterized in that, The outer peripheral wall of the drive roller is covered with a second adhesive layer.

6. The peeling auxiliary mechanism according to claim 5, characterized in that, The first adhesive layer comprises at least one of silicone rubber and polyurethane, and / or the second adhesive layer comprises at least one of silicone rubber and polyurethane.

7. The peeling auxiliary mechanism according to claim 1, characterized in that, The peeling auxiliary mechanism also includes a cylinder connected to the pressure roller; the cylinder is used to move the pressure roller closer to or away from the tobacco sheet located on the conveyor belt.

8. The peeling auxiliary mechanism according to claim 1, characterized in that, The guide roller includes a metal roller.

9. A tobacco sheet peeling device using a slurry method, characterized in that, include: The first drying unit, the second drying unit, and the peeling auxiliary unit according to any one of claims 1-8, the peeling auxiliary unit being used to peel off tobacco sheets located on the first drying unit and convey them to the second drying unit.

10. The tobacco sheet peeling apparatus according to claim 9, characterized in that, The first drying mechanism includes a body and a conveyor steel belt. The conveyor steel belt is wound around the body and is used to convey the tobacco sheet. The pressure roller and the scraper are located on one side of the body and are arranged sequentially along the conveying direction of the conveyor steel belt.

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