Method for homogenizing thin sheets by lifting roller pressing

Abstract

This invention belongs to the field of roll forming sheet manufacturing technology, and discloses a method for improving the homogenization of roll forming sheets, comprising: S1, performing a first strong mixing of raw materials; S2, extruding the first strongly mixed raw materials and outputting them through a sieve to form strips; S3, cutting the strips of raw materials into granules; S4, performing a second strong mixing of the granules of raw materials; S5, rolling the second strongly mixed raw materials to form sheets and drying them before outputting them. This method for improving the homogenization of roll forming sheets, based on traditional roll forming sheet preparation, effectively reduces the crimp or agglomeration of plant fibers in the sheets by extruding the first strongly mixed raw materials through a sieve; cutting the extruded strips of raw materials effectively reduces the length of plant fibers in the raw materials; furthermore, the first and second strong mixing of the raw materials further improves the problem of uneven mixing of raw materials.

Description

Technical Field

[0001] This invention relates to the field of roll forming sheet manufacturing technology, and more particularly to a method for improving the homogenization of roll forming sheets. Background Technology

[0002] The traditional method of manufacturing tobacco sheets involves pulverizing tobacco stems, dust, and stalks, then mixing them with plant fibers, binders, humectants, and water in a specific ratio to form granules. These granules are then rolled into sheets using a roller press and dried. Roll-pressed tobacco sheets have significant applications in heated cigarettes, but their poor strength limits their quality improvement. A common method to enhance strength during production involves adding plant fibers (such as wood pulp fiber, bagasse fiber, and tobacco stem shreds) to the sheets. However, the low moisture content of the raw materials, the hydrophilic nature of plant fibers, and their high aspect ratio make them prone to flocculation and uneven dispersion within the sheet, thus limiting their effectiveness. Therefore, achieving uniform dispersion of raw materials in the roller-pressing process is crucial for improving both the strength and quality of the sheets. Summary of the Invention

[0003] The purpose of this invention is to provide a method for homogenizing thin sheets using a roller pressing method, which significantly improves the uniformity of raw materials in the thin sheets, thereby enhancing the quality and strength of the thin sheets.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The method for homogenizing thin films using the lifting roller pressing method includes the following steps:

[0006] S1, the raw materials are mixed vigorously for the first time;

[0007] S2, the raw materials after the first strong mixing are extruded and output through a sieve to form strips;

[0008] S3, the strip-shaped raw material is cut into granules;

[0009] S4, the granular raw materials are subjected to a second strong mixing;

[0010] S5, the raw materials after the second strong mixing are rolled into thin sheets and dried before being output.

[0011] As an alternative, the mass ratio of tobacco powder, binder, plant fiber and humectant in the raw materials is 50-93:1-10:1-10:5-30.

[0012] As an optional option, the water content in the raw material is 20%-60%.

[0013] As an alternative, the mass ratio of the tobacco powder, the binder, the plant fiber, and the humectant in the raw materials is 67:8:5:20; and the water content in the raw materials is 30%.

[0014] As an alternative, the mass ratio of the tobacco powder, the binder, the plant fiber, and the humectant in the raw materials is 71:4:10:15; and the water content in the raw materials is 50%.

[0015] As an alternative, step S3-1 is also included between step S3 and step S4, in which the granular raw material is first transported to a mixing tank and mixed evenly before the second strong mixing is performed.

[0016] As an alternative, the diameter of the granular raw material is between 1 and 10 mm.

[0017] As an alternative, the length of the granular raw material is between 1 and 50 mm.

[0018] As an alternative, the first vigorous mixing in step S1 and the second vigorous mixing in step S5 are both performed by a mixer.

[0019] As an optional approach, in step S5, the rolling method involves rolling the raw material step by step into a sheet of a predetermined thickness using three sets of pressure rollers.

[0020] The beneficial effects of this invention are:

[0021] This invention provides a method for homogenizing sheet using a lifting roller pressing method, comprising the following steps: S1, performing a first strong mixing of raw materials; S2, extruding the first strongly mixed raw materials and outputting them through a sieve to form strips; S3, cutting the strips of raw materials into granules; S4, performing a second strong mixing of the granules of raw materials; S5, rolling the second strongly mixed raw materials to form sheets and drying them before outputting them. This lifting roller pressing method for sheet homogenization, based on traditional sheet preparation using a roller pressing method, extrudes the first strongly mixed raw materials through a sieve to form strips. The resistance of the sieve holes straightens any curled or agglomerated plant fibers in the raw materials, effectively reducing curl or agglomeration. Simultaneously, the extruded strips are cut online, effectively reducing the length and agglomeration of plant fibers in the raw materials. Furthermore, the first and second strong mixing of the raw materials further improves the problem of uneven mixing. The lifting roller pressing method for sheet homogenization of this invention is simple to operate and has good results. Attached Figure Description

[0022] Figure 1 This is a flowchart of the method for homogenizing thin sheets using the lifting roller pressing method provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the system for homogenizing thin sheets using the lifting roller pressing method provided in Embodiment 2 of the present invention;

[0024] Figure 3 This is a schematic diagram of the cutting assembly and sieve plate involved in Embodiment 2 of the present invention;

[0025] Figure 4 yes Figure 2 Cross-sectional view of AA.

[0026] In the picture:

[0027] 1. First mixer; 11. First mixing frame; 12. First mixing shaft; 13. First mixing blade;

[0028] 2. Extruder; 21. Extrusion frame; 211. Sieve plate; 2111. Sieve holes; 22. Extrusion shaft; 221. Spiral shoulder;

[0029] 3. Cutting assembly; 31. Tool holder; 32. Cutting blade; 321. Positioning pin; 322. Fixing screw;

[0030] 4. Second mixer; 41. Second mixing frame; 42. Second mixing shaft; 43. Second mixing blade;

[0031] 5. Roller assembly; 51. Pressure roller; 511. Upper roller; 512. Lower roller;

[0032] 6. Dryer;

[0033] 7. Mixing tank; 71. Mixing tank rack; 72. Agitator; 711. Baffle;

[0034] 8. Conveyor belt; 81. Drive roller; 82. Driven roller; 83. Shovel;

[0035] 9. Output roller. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] like Figure 1As shown, this embodiment of the invention provides a method for homogenizing thin sheets using a lifting roller pressing method, comprising the following steps: S1, the raw materials are subjected to a first strong mixing and kneading into a ball to facilitate extrusion molding; S2, the raw materials after the first strong mixing are conveyed to an extruder 2 for extrusion, the outlet end of the extruder 2 is provided with a sieve plate 211, the sieve plate 211 is provided with sieve holes 2111, the extruder 2 extrudes the raw materials after the first strong mixing and outputs them through the sieve holes 2111 of the sieve plate 211 to form strips, when the raw materials are extruded and output through the sieve holes 2111, the raw materials are... The curled plant fibers are straightened by resistance, reducing crimp and agglomeration; S3, granulation technology is introduced to cut the output strip-shaped raw material online to form granules. The length of plant fibers in the cut granules is effectively reduced, further reducing agglomeration; S4, the granules are subjected to a second strong mixing and kneaded into a ball for output. By using a double strong mixing technology, the problem of uneven mixing of various substances in the raw material is effectively improved; S5, the raw material after the second strong mixing is rolled into a sheet and dried before output. The first strong mixing in step S1 and the second strong mixing in step S4 are both completed by a mixer. The mixer performs the mixing action and includes a first mixer 1 and a second mixer 4. In step S1, the raw material is conveyed to the first mixer 1 for the first strong mixing and kneading into a ball. In step S4, the granules are conveyed to the second mixer 4 for the second strong mixing and kneading into a ball for output.

[0042] This method for homogenizing sheet using the lifting roller pressing technique, based on traditional sheet preparation, involves extruding the first strongly mixed raw material through sieve holes 2111 to form strips. The resistance of the sieve holes 2111 straightens any curled or agglomerated plant fibers in the raw material, effectively reducing curl or agglomeration. Simultaneously, the extruded strips are cut online, further reducing the length and agglomeration of plant fibers. Furthermore, the first and second strongly mixed processes further improve the problem of uneven mixing. This invention's method for homogenizing sheet using the lifting roller pressing technique is simple to operate and highly effective.

[0043] In this embodiment, the raw materials are a mixture of dry and wet materials, including tobacco powder, binder, plant fiber, humectant and water. The tobacco powder, binder, plant fiber, humectant and water are stirred and mixed in a certain proportion.

[0044] Optionally, the mass ratio of tobacco powder, binder, plant fiber, and humectant in the raw materials is 50-93:1-10:1-10:5-30. Raw materials using this ratio produce sheets with high strength and good quality.

[0045] Furthermore, the water content in the raw materials is 20%-60%, meaning that water accounts for 20%-60% of the total mass of tobacco powder, binder, plant fiber, humectant, and water in the raw materials. A water content between 20% and 60% in the raw materials provides a suitable moisture content, resulting in high strength and good quality of the final sheet.

[0046] Tobacco powder can be made by grinding tobacco leaves, tobacco dust and tobacco stems into powder; plant fiber can be wood pulp fiber.

[0047] For example, the mass ratio of tobacco powder, binder, plant fiber, and humectant (glycerin) is 67:8:5:20; the water content in the raw materials is 30%. After a first strong mixing, the raw materials are extruded and cut, then subjected to a second strong mixing and kneading into a ball. Finally, the resulting sheets are rolled and dried. Experimental testing shows that the tensile strength of the sheets is 458 N / m, indicating good sheet quality.

[0048] For example, the proportions of the various substances in the raw materials can also be adjusted in another way, namely, the mass ratio of tobacco powder, binder, plant fiber, and humectant (glycerin) is 71:4:10:15; and the water content of the raw materials is 50%. After the raw materials with this ratio are subjected to a first strong mixing, they are extruded and cut, then subjected to a second strong mixing and kneaded into a ball, and finally rolled into thin sheets and dried. Experimental testing shows that the tensile strength of the sheets is 570 N / m, indicating good sheet quality.

[0049] To further improve the uniformity of the various materials in the sheet, step S3-1 is included between step S3 and step S4. After cutting the strip-shaped raw material into granules, the granules are first transported to mixing tank 7 for mixing. That is, the relative positions of the granules in mixing tank 7 are rearranged to make the mixing more uniform.

[0050] Optionally, the diameter of the granular raw material is between 1 and 10 mm, which is within the range of diameter that facilitates cutting.

[0051] Optionally, the length of the granular raw material is between 1 and 50 mm, which is beneficial for the uniform mixing of the granular raw material.

[0052] In step 5, the rolling method uses three sets of pressure rollers 51 to roll the raw material output from the second mixer 4 into a sheet of predetermined thickness. The rolling method produces a good sheet forming effect, is not easy to break, and has a uniform thickness.

[0053] The lifting roller pressing method for homogenizing sheet in Embodiment 1 of this invention utilizes particle mixing technology and secondary high-intensity mixing technology to mix the raw materials multiple times in different ways, effectively improving the problem of uneven mixing of raw materials with low moisture content in dry and wet mixtures. The sheet obtained by this lifting roller pressing method shows improved plant fiber agglomeration and increased sheet strength. This lifting roller pressing method for homogenizing sheet has a simple operation process and good industrial prospects.

[0054] Example 2

[0055] like Figure 2 As shown, this embodiment of the invention provides a system for homogenizing sheet using the lifting roller pressing method, applying the lifting roller pressing method for homogenizing sheet in Embodiment 1 to this system. The lifting roller pressing method for homogenizing sheet includes a first mixer 1, an extruder 2, a cutting assembly 3, a second mixer 4, a roller pressing assembly 5, and a dryer 6. In the preparation of sheet by roll forming, the dry and wet mixed raw materials enter through the inlet end of the first mixer 1. After the raw materials are subjected to a first strong mixing in the first mixer 1, they are kneaded into a ball and output through the outlet end of the first mixer 1 and enter the extruder 2 through the inlet end of the extruder 2. The outlet end of the extruder 2 is provided with a sieve plate 211, which has multiple sieve holes 2111. The extruder 2 extrudes the raw materials after the first strong mixing and outputs them through the sieve holes 2111 of the sieve plate 211 to form strips. The curled or agglomerated plant fibers in the raw materials can be straightened during the extrusion process, effectively reducing the agglomeration of the raw materials. The shape of the sieve holes 2111 can be circular, triangular, rectangular, or trapezoidal, etc., and is not limited here. Preferably, the sieve holes 2111 are... 11 is set to be circular, with a diameter between 1-10mm. Specifically, the diameter of the sieve hole 2111 can be set to 1mm, 1.5mm, 3mm or 10mm, etc., depending on the actual needs. The strip-shaped raw material output through the sieve plate 211 is then cut into granules by the cutting component 3 and enters the second mixer 4 through the inlet end. The length of the plant fiber in the cut raw material is reduced, further reducing the agglomeration of the raw material. The second mixer 4 then performs a second strong mixing and kneading of the granular raw material into a ball, and outputs it to the conveyor belt 8 through the outlet end of the second mixer 4. The roller pressing component 5 rolls the raw material on the conveyor belt 8 to form a thin sheet. The dryer 6 dries the thin sheet.

[0056] After the raw materials are subjected to a first high-intensity mixing process in the first mixer 1, they are extruded into strips by the extruder 2 and cut into granules by the cutting assembly 3. These granules are then conveyed to the second mixer 4 for a second high-intensity mixing and kneading into a dough. The dough is then rolled into thin sheets by the roller pressing assembly 5, and finally dried by the dryer 6. The thin sheets obtained through this lifting roller pressing method for sheet homogenization exhibit significantly improved internal raw material uniformity, thereby enhancing the sheet strength and quality.

[0057] The raw materials for dry and wet mixtures include tobacco powder, binders, plant fibers, humectants, and water, with water accounting for 20%-60% of the raw materials.

[0058] To further improve the uniformity of raw materials within the sheet, the sheet homogenization system using the lifting roller pressing method also includes a mixing tank 7. The cutting component 3 cuts the strip-shaped raw material into granules, which first enter the mixing tank 7 through its inlet end. The mixing tank 7 then mixes the granular raw material uniformly before outputting it to the second mixer 4 through its outlet end. After the granular raw material enters the mixing tank 7, the mixing tank 7 can rearrange the relative positions of the granular raw material; for example, it can move granular raw material located on the left side of the mixing tank 7 to the right side, and granular raw material located on the right side of the mixing tank 7 to the left side.

[0059] The mixing tank 7 includes a mixing tank frame 71, a mixing motor, and multiple agitators 72. Along the axial direction of the mixing tank frame 71, the multiple agitators 72 are spaced apart and staggered on the inner circumferential surface of the mixing tank frame 71. Each agitator 72 is capable of rotating around its axis, and the mixing motor drives the mixing tank frame 71 to rotate around its axis. (Refer to...) Figure 2 There are three agitators 72: one on the left side of the mixing tank frame 71, one in the middle of the mixing tank frame 71, and one on the right side of the mixing tank frame 71. The three agitators 72 are staggered. After the granular raw material enters the mixing tank frame 71, the mixing tank frame 71 revolves around its axis, and the three agitators 72 rotate around their own axes. When the mixing tank frame 71 revolves, the agitator 72 on the left stirs the granular raw material and moves it towards the middle of the mixing tank frame 71, the agitator 72 on the right stirs the granular raw material and moves it towards the middle of the mixing tank frame 71, and the agitator 72 in the middle stirs the granular raw material to the left and right, so that the relative position of the granular raw material changes and the mixing becomes more uniform. Six agitators 72 can also be provided, wherein two agitators 72 are symmetrically arranged in the first group and located on the left side of the mixing tank frame 71, two agitators 72 are symmetrically arranged in the second group and located in the middle of the mixing tank frame 71, and two agitators 72 are symmetrically arranged in the third group and located on the right side of the mixing tank frame 71, and the six agitators 72 are distributed alternately.

[0060] The number of agitators 72 is determined according to the length of the mixing tank frame 71. The number of agitators 72 can also be set to two, four, five, seven... or more, and there is no limitation here.

[0061] Furthermore, in order to enable the mixing tank rack 71 to carry the granular raw material upwards and then fall down during rotation, refer to... Figure 2 and combined Figure 4 The inner circumferential surface of the mixing tank 71 is also provided with multiple sets of baffles 711. These baffles 711 are spaced apart along the axial direction of the mixing tank 71, that is, evenly distributed from the left to the right side of the mixing tank 71. Each set of baffles 711 contains multiple baffles 711, which are evenly distributed around the inner circumference of the mixing tank 71. When the mixing tank 711 rotates, the baffles 711 can carry the granular raw materials up a certain distance before they fall. At this time, the stirring paddle 72, rotating around its own axis, can agitate the falling granular raw materials, thus making the mixing more uniform.

[0062] Preferably, the baffle 711 is inclined on the inner circumferential surface of the mixing tank frame 71, that is, the baffle 711 is set at a non-90° angle with the tangent of the mixing tank frame 71 at this position, so as to make it easier to lift the granular raw materials.

[0063] In this embodiment, the mixing tank rack 71 is inclined so that its inlet end is higher than its outlet end, facilitating the output of granular raw materials. Additionally, the outlet end of the mixing tank rack 71 is equipped with a rapid discharge plate, allowing the granular raw materials to be output along the rapid discharge plate as the mixing tank rack 71 revolves around its axis. Optionally, the angle of inclination between the axis of the mixing tank rack 71 and the horizontal line is set between 5° and 30°, specifically 5°, 15°, or 30°.

[0064] Continue to refer to Figure 2 The extruder 2 includes an extrusion frame 21, an extrusion shaft 22, and an extrusion motor. The outer circumferential surface of the extrusion shaft 22 is provided with a helical shoulder 221. The extrusion shaft 22 is rotatably mounted inside the extrusion frame 21. A sieve plate 211 is fixedly mounted at the outlet end of the extrusion frame 21. The extrusion motor drives the extrusion shaft 22 to rotate. The raw material, after the initial strong mixing, is kneaded into a ball and enters the extrusion frame 21 through the inlet end. When the extrusion motor drives the extrusion shaft 22 to rotate, the helical shoulder 221 drives the raw material inside the extrusion frame 21 to exit through the sieve holes 2111 of the sieve plate 211. This structure can extrude the lumpy raw material into strips for output, allowing the curled or agglomerated plant fibers in the raw material to be straightened during the extrusion process, effectively reducing the agglomeration of the raw material.

[0065] Reference Figure 2 and Figure 3The cutting assembly 3 includes a blade holder 31, a cutter 32, and a cutting motor. The cutter 32 is fixedly mounted on the blade holder 31, parallel to the screen plate 211, and positioned close to the screen plate 211 so that the cutter 32 can cut the raw material after it passes through the screen plate 211 without automatically breaking it due to its own gravity. It can be understood that the rotational speed of the cutter 32 and the rotational speed of the extrusion shaft 22 in the extruder 2 determine the length of the granular raw material. Optionally, the length of the granular raw material is 1-50mm; specifically, the length of the granular raw material can be set to 1mm, 1.5mm, 10mm, or 50mm, and the rotational speed of the cutter 32 or the extrusion shaft 22 can be adjusted according to actual needs.

[0066] Optionally, multiple cutters 32 are provided, and the multiple cutters 32 are evenly distributed on the tool holder 31 around the circumference of the tool holder 31. Providing multiple cutters 32 can effectively reduce the rotational speed of the tool holder 31, making the structure more reasonable. Preferably, the number of cutters 32 can be set to 3-6.

[0067] Optionally, the cutter 32 is fixedly mounted on the cutter holder 31 by a positioning pin 321 and a fixing screw 322, making the cutter 32 easy to install and accurately positioned.

[0068] Optionally, the tool holder 31 is provided with a limiting groove, and the cutter 32 is embedded in the limiting groove and installed on the tool holder 31 by a positioning pin 321 and a fixing screw 322. In this structure, the limiting groove not only serves a positioning function, but also can withstand a certain pressure during the rotation of the cutter 32, making the installation and replacement of the cutter 32 more convenient and the operation more stable.

[0069] Continue to refer to Figure 2 The first mixer 1 includes a first mixing frame 11, a first mixing shaft 12, first mixing blades 13, and a first mixing motor. Multiple first mixing blades 13 are provided, and are welded at intervals to the outer circumferential surface of the first mixing shaft 12 along its axial direction. The first mixing shaft 12 is rotatably mounted on the first mixing frame 11, and the first mixing motor drives the first mixing shaft 12 to rotate. When the first mixing shaft 12 rotates, the multiple first mixing blades 13 perform a strong initial mixing and kneading of the raw materials into a dough.

[0070] The multiple first stirring blades 13 are configured in two groups, and the two groups of first stirring blades 13 are symmetrically arranged with the axis of the first stirring shaft 12 as the center line. The first stirring blade 13 can also be configured as an integral annular plate structure, which is sleeved and welded to the outer circumferential surface of the first stirring shaft 12.

[0071] The second mixer 4 includes a second mixing frame 41, a second mixing shaft 42, second mixing blades 43, and a second mixing motor. Multiple second mixing blades 43 are provided, welded at intervals to the outer circumferential surface of the second mixing shaft 42 along its axial direction. The second mixing shaft 42 is rotatably mounted on the second mixing frame 41, and the second mixing motor drives the second mixing shaft 42 to rotate. When the second mixing shaft 42 rotates, the multiple second mixing blades 43 perform a second, vigorous mixing of the raw materials and knead them into a dough. The structure of the second mixing blades 43 is the same as that of the first mixing blade 13, and will not be described again here.

[0072] It is understood that the first mixing rack 11, the extrusion rack 21, the mixing tank rack 71, and the second mixing rack 41 are all hollow structures.

[0073] Preferably, the spacing between adjacent second stirring blades 43 gradually decreases from the inlet end to the outlet end of the second stirring frame 41. In this structure, the spacing between adjacent second stirring blades 43 at the inlet end of the second stirring frame 41 is greater than the spacing between adjacent second stirring blades 43 at the outlet end of the second stirring frame 41, which is beneficial for generating a certain pressure on the raw material at the outlet end of the second stirring frame 41, so that the granular raw material is evenly stirred and kneaded into a ball for output.

[0074] Preferably, the outlet end of the second mixing frame 41 is a narrow square outlet with a length dimension greater than its width dimension. The length of the square outlet matches the width of the sheet, preferably 200-2000 mm, and the width is preferably 3-100 mm. When the mixing reaches a predetermined time or degree, the raw material is extruded from the outlet end of the second mixing frame 41, pre-shaped, and spread flat on the conveyor belt 8. The conveyor belt 8, under the combined action of the drive roller 81 and the driven roller 82, rolls along a set direction to output the sheet.

[0075] The roller pressing assembly 5 includes three sets of pressure rollers 51. Each set of pressure rollers 51 includes an upper roller 511 and a lower roller 512 arranged vertically. The three sets of pressure rollers 51 are spaced apart along the rolling direction of the conveyor belt 8. The lower roller 512 abuts against the inner side of the conveyor belt 8, and the upper roller 511 is located above the conveyor belt 8 and has a set gap with the outer side of the conveyor belt 8. The upper roller 511 moves up and down in the vertical direction to reach the set gap with the conveyor belt 8. Along the rolling direction of the conveyor belt 8, the set gaps between the three upper rollers 511 and the outer side of the conveyor belt 8 gradually decrease. When the raw material, which has been strongly mixed and kneaded into a ball in the second stage, is output to the conveyor belt 8 through the outlet end of the second mixing frame 41, it passes through the three sets of pressure rollers 51 in sequence and is rolled into a sheet of a predetermined thickness.

[0076] When the sheet is output through the conveyor belt 8, it passes through the drying channel of the dryer 6 for drying and shaping. The scraper 83 separates the sheet from the conveyor belt 8 and outputs it through the output roller 9.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for homogenizing a lifting roll sheet, using a lifting roll sheet homogenizing system, the lifting roll sheet homogenizing system comprising: a first mixer (1) configured to perform a mixing action on raw materials; an extruder (2) having an inlet end in communication with an outlet end of the first mixer (1), and an outlet end provided with a screen plate (211) provided with a plurality of screen holes (2111), the extruder (2) being configured to perform an extruding action and output the raw materials through the plurality of screen holes (2111); a cutting assembly (3) located at the outlet end of the extruder (2), the cutting assembly (3) being capable of performing a cutting action; a second mixer (4) located downstream of the cutting assembly (3), the second mixer (4) being configured to perform a mixing action on the raw materials; a rolling assembly (5) having an inlet end in communication with an outlet end of the second mixer (4), the rolling assembly (5) being capable of performing a rolling action; a dryer (6) located at an outlet end of the rolling assembly (5), the dryer (6) being configured to perform a drying operation; a mixing tank (7) having an inlet end in communication with the outlet end of the extruder (2) and an outlet end in communication with the inlet end of the second mixer (4), the mixing tank (7) being configured to perform a mixing action; the mixing tank (7) comprising a mixing tank frame (71), a mixing motor, and a plurality of stirring paddles (72) spaced and staggered along an axial direction of the mixing tank frame (71) and distributed on an inner circumferential surface of the mixing tank frame (71), the mixing motor being capable of driving the mixing tank frame (71) to rotate about its axis; characterized in that the method for homogenizing a lifting roll sheet comprises the following steps: S1, performing a first intensive mixing on raw materials; S2, performing an extruding action on the raw materials after the first intensive mixing and outputting the raw materials in a strip shape through the screen holes; S3, cutting the raw materials in a strip shape to form a granular shape; S4, performing a second intensive mixing on the raw materials in a granular shape; and S5, performing a rolling action on the raw materials after the second intensive mixing to form a sheet shape and performing a drying operation before outputting the raw materials; and further comprising a step S3-1 between the step S3 and the step S4, wherein the raw materials in a granular shape are transported into the mixing tank (7) and uniformly mixed before the second intensive mixing. The first intensive mixing in the step S1 is completed by the first mixer (1), and the second intensive mixing in the step S5 is completed by the second mixer (4). The mass ratio of tobacco powder, adhesive, plant fiber, and humectant in the raw materials is 50-93:1-10:1-10:5-30. The proportion of water in the raw materials is 20%-60%. The mass ratio of the tobacco powder, the adhesive, the plant fiber, and the humectant in the raw materials is 67:8:5:20, and the proportion of water in the raw materials is 30%. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The method of homogenizing a roll-pressed sheet according to claim 1, wherein ​ 3. The method of homogenizing a roll-pressed sheet according to claim 2, wherein ​ 4. The method of homogenizing a roll-pressed sheet according to claim 3, wherein ​ 5. The method of homogenizing a roll-pressed sheet according to claim 3, wherein The mass ratio of the tobacco powder, the adhesive, the plant fiber and the humectant in the raw material is 71:4:10:15; the water accounts for 50% in the raw material.

6. The method of homogenizing a calendered sheet according to any one of claims 1-5, wherein, The diameter of the granular raw material is between 1-10mm.

7. The method of homogenizing a calendered sheet according to any one of claims 1-5, wherein, The length of the granular raw material is between 1-50mm.

8. The method of homogenizing a calendered sheet according to any one of claims 1-5, wherein, The rolling mode in step S5 is to roll the raw material into the sheet with a predetermined thickness by three groups of pressing rollers (51).

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