A cleaning device and method for a high tack tobacco leaf sheet cutting unit

Abstract

The application provides a cleaning device and method for a high-viscosity tobacco sheet cutting unit, comprising: a first air jet device and a second air jet device; a first comb-shaped scraper is installed on the first air jet device, and a second comb-shaped scraper is installed on the second air jet device; the first air jet device cleans the cutting unit by high-speed airflow combined with the first comb-shaped scraper; and the second air jet device cleans the cutting unit by high-speed airflow combined with the second comb-shaped scraper. The application can clean the sticky tobacco dust, powder and broken filaments generated during the cutting of the tobacco sheet in real time and in line, so as to ensure the cleaning of the cutting unit and the continuous and stable conveying of the tobacco rod, and the sticky tobacco dust, powder and broken filaments are collected to prevent secondary pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cigarette blank manufacturing equipment, in particular to a cleaning device and cleaning method for a high-viscosity tobacco sheet cutting unit. BACKGROUND

[0002] In the environment of continuously pursuing the reduction of tar and harm in cigarette products, heat-not-burn cigarettes have developed rapidly in recent years due to their lower tar hazards and excellent consumer experience. Existing heat-not-burn cigarettes are mainly divided into center heating type and surface heating type according to different heating methods, and the center heating type has more advantages in smoke taste, smoking times, and consistency of single smoke volume, and dominates the market absolutely. The center heating type cigarette is composed of multiple short rods with different functions, usually including a tobacco base rod containing tobacco components, a support rod, a cooling rod, a filter rod, etc.

[0003] The tobacco base rod is the most core functional unit of the heat-not-burn cigarette, which is usually made by expanding the rolled reconstituted tobacco into a tobacco sheet, and then wrapping it with cigarette paper after embossing and curling or cutting.

[0004] After the rolled reconstituted tobacco is expanded into a tobacco sheet, a large amount of sticky tobacco dust will be generated during the cutting process of the cutting unit, which will continuously accumulate in the knife groove and form a blockage, causing the tobacco sheet to be unable to pass through the cutting unit for cutting. Through manual cleaning, the use efficiency of the equipment is affected, and the dust will scatter everywhere, polluting the production environment, and the scattered dust will also adhere to other devices, affecting the stable operation of other devices. At the same time, some broken filaments will be generated during the cutting process of the tobacco sheet, which will be wound in the annular knife groove of the cutting unit, causing the cutting function of the cutting unit to fail, not only affecting the continuous and stable conveying of the cigarette, but also causing a fault shutdown in severe cases.

[0005] At present, the existing related dust removal technology on the market has single dust removal mode, low efficiency, and unsatisfactory dust removal effect, especially for sticky powder, which is helpless. SUMMARY

[0006] The present application provides a cleaning device and cleaning method for a high-viscosity tobacco sheet cutting unit to solve the technical problem that a large amount of sticky tobacco dust generated during the cutting of the rolled reconstituted tobacco sheet cannot be effectively cleaned in the process of manufacturing a tobacco base rod from the rolled reconstituted tobacco sheet.

[0007] The technical solutions provided by the present application are as follows:

[0008] The present application aims to provide a cleaning device for a high-viscosity tobacco sheet cutting unit, which is used to remove dust, tobacco powder and the like generated when cutting a high-viscosity reconstituted tobacco sheet from the cutting unit and separate and collect the dust. The cleaning device is arranged below the cutting unit and comprises a first air jet device and a second air jet device;

[0009] A first comb-type scraper is installed on the first air jet device, and a second comb-type scraper is installed on the second air jet device,

[0010] The first air jet device cleans the cutting unit by means of high-speed airflow combined with the first comb-type scraper, and the second air jet device cleans the cutting unit by means of high-speed airflow combined with the second comb-type scraper.

[0011] In a preferred embodiment, the cutting unit comprises a first knife roller and a second knife roller, the first knife roller is provided with a plurality of first disc cutters arranged alternately, the second knife roller is provided with a plurality of second disc cutters arranged alternately, and the plurality of first disc cutters and the plurality of second disc cutters are in meshing engagement with each other;

[0012] A plurality of first annular knife grooves are formed between the plurality of first disc cutters arranged alternately, and a plurality of second annular knife grooves are formed between the plurality of second disc cutters arranged alternately;

[0013] The first comb-type scraper is located on one side of the first knife roller and is embedded in the plurality of first annular knife grooves formed between the plurality of first disc cutters arranged alternately;

[0014] The second comb-type scraper is located on one side of the second knife roller and is embedded in the plurality of second annular knife grooves formed between the plurality of second disc cutters arranged alternately.

[0015] In a preferred embodiment, the first air jet device is provided with a first air inlet, and a first air outlet is arranged between the gaps of the first comb-type scraper;

[0016] The second air jet device is provided with a second air inlet, and a second air outlet is arranged between the gaps of the second comb-type scraper.

[0017] In a preferred embodiment, the cleaning device further comprises a first plasma nozzle, a second plasma nozzle and a plasma generator,

[0018] The plasma generator is connected to the first plasma nozzle and the second plasma nozzle, the first plasma nozzle is opposite to the first annular knife groove, and the second plasma nozzle is opposite to the second annular knife groove.

[0019] In a preferred embodiment, the cleaning device further comprises a collecting groove, a collecting box, a negative pressure conveying pipeline, a filter and a negative pressure fan.

[0020] The collecting groove is located below the second disc cutter, and the collecting box is located below the collecting groove and is connected to the collecting groove through a pipeline.

[0021] The negative pressure conveying pipeline is connected to the collecting box and the negative pressure fan, and the filter is arranged on the negative pressure conveying pipeline.

[0022] In a preferred embodiment, the cleaning device is arranged below a cutting unit, and a feeding unit is arranged on the downstream side of the cutting unit.

[0023] The feeding unit comprises a negative pressure suction nozzle, and the negative pressure fan is connected to the negative pressure suction nozzle.

[0024] In a preferred embodiment, the feeding unit comprises a first planar recessed plate and a second planar recessed plate, and the first planar recessed plate extends between the first knife roller and the second knife roller.

[0025] The bottom surface of the first planar recessed plate and the second planar recessed plate is respectively provided with a plurality of dust suction holes, and the plurality of dust suction holes are connected to the negative pressure fan through the negative pressure suction nozzle.

[0026] Another object of the present application is to provide a cleaning method for a high-viscosity tobacco sheet cutting unit, which utilizes the cleaning device for the high-viscosity tobacco sheet cutting unit provided by the present application to clean the cutting unit, comprising:

[0027] primary cleaning,

[0028] The tobacco sheet is conveyed to the cutting unit, and the cutting unit cuts the tobacco sheet into a plurality of tobacco strips along the longitudinal direction;

[0029] The first comb-shaped scraper and the second comb-shaped scraper of the cleaning device, in combination with the high-speed airflow introduced by the first air jet device and the second air jet device, clean the first annular knife groove and the second annular knife groove;

[0030] secondary cleaning,

[0031] The plasma generator of the cleaning device generates plasma and introduces the plasma into the first annular knife groove and the second annular knife groove through the first plasma nozzle and the second plasma nozzle, thereby performing deep cleaning on the first annular knife groove and the second annular knife groove again;

[0032] waste collection;

[0033] The negative pressure fan of the cleaning device generates negative pressure, and the waste falling into the collecting groove is collected into the collecting box.

[0034] In a preferred embodiment, the waste falling after being cleaned by the first annular knife groove falls on the first flat groove plate; the waste falling after being cleaned by the second annular knife groove falls into the collecting groove;

[0035] The waste enters the collecting box from the collecting groove and the bottom of the first flat groove plate 3 through the air suction of the negative pressure fan, so that the negative pressure is generated in the collecting box.

[0036] Compared with the prior art, the technical scheme of the present application has at least the following beneficial effects:

[0037] The present application provides a cleaning device and method for a high-viscosity tobacco sheet cutting unit, which can clean the generated powder in time and depth during the cutting of the tobacco sheet, and ensure the reliability of the cutting unit for cutting the tobacco sheet.

[0038] The present application provides a cleaning device and method for a high-viscosity tobacco sheet cutting unit, which can clean the generated viscous tobacco dust, powder and broken filaments in line and in real time to ensure the cleaning of the cutting unit and the continuous and stable conveying of the tobacco rod, and collect the viscous tobacco dust, powder and broken filaments to prevent secondary pollution. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 is a structural schematic diagram of a heating type cigarette rod manufacturing device.

[0041] Figure 2 is a structural schematic diagram of a releasing unit.

[0042] Figure 3 is a structural schematic diagram of a cutting unit.

[0043] Figure 4 is a schematic diagram of the mutual engagement of the first disc cutter and the second disc cutter.

[0044] Figure 5 is a schematic diagram of the feeding of the tobacco sheet into the cutting unit.

[0045] Figure 6 is a schematic diagram of the cutting of the tobacco sheet into a plurality of tobacco rods.

[0046] Figure 7is a cross-sectional view of the first air guide block in an embodiment of the present application.

[0047] Figure 8 is a schematic view of the first air guide block being placed between the second disc cutter and the corresponding first annular cutter groove.

[0048] Figure 9 is a cross-sectional view of the second air guide block in an embodiment of the present application.

[0049] Figure 10 is a schematic view of the second air guide block being placed between the first disc cutter and the corresponding second annular cutter groove.

[0050] Figure 11 is a schematic view of the movement trajectory of the tobacco sheet being cut into tobacco strips when the support assembly is not provided.

[0051] Figure 12 is a schematic view of the cutting unit cutting the tobacco sheet when the first air guide block is provided between the second disc cutter and the corresponding first annular cutter groove.

[0052] Figure 13 is a schematic view of the movement trajectory of the tobacco sheet being cut into tobacco strips when the first air guide block is provided between the second disc cutter and the corresponding first annular cutter groove.

[0053] Figure 14 is a schematic view of the second disc cutter cutting the tobacco sheet.

[0054] Figure 15 is a schematic view of the cutting unit cutting the tobacco sheet when the second air guide block is provided between the first disc cutter and the corresponding second annular cutter groove.

[0055] Figure 16 is a schematic view of the first disc cutter cutting the tobacco sheet.

[0056] Figure 17 is a schematic view of the structure of the curling unit.

[0057] Figure 18 is a schematic view of the structure of the feeding unit.

[0058] Figure 19 is a schematic view of the gap formed between the outer circumference of the first traction roller and the outer circumference of the second traction roller.

[0059] Figure 20 is a cross-sectional view of the converging funnel.

[0060] Figure 21 is a schematic view of the structure of the first air jet device.

[0061] Figure 22 is a structural schematic diagram of a second air jet device of the present application.

[0062] Figure 23 is a structural schematic diagram of a cleaning device of the present application. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any inventive effort fall within the scope of protection of the present application.

[0064] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning understood by those of ordinary skill in the art to which the present application belongs. The terms “first”, “second” and similar terms used in the present application do not represent any order, number or importance, but are only used to distinguish different components. Similarly, the terms “one”, “an” or “the” and similar terms do not represent a quantity limitation, but represent the existence of at least one. The terms “include” or “contain” and similar terms mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms “connect” or “connected” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0065] It should be noted that “up”, “down”, “left”, “right”, “front”, “back” and the like used in the present application are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0066] As Figure 1 shown in a structural schematic diagram of a manufacturing device of a heated cigarette rod according to an embodiment of the present application, according to the embodiment of the present application, a manufacturing device of a heated cigarette rod is provided for processing and feeding of a heated non-combustible cigarette rod.

[0067] In traditional cigarettes, short mixed threads mixed in proportion from leaf threads, stem threads and the like are called tobacco threads, and these tobacco threads are irregularly filled in a forming paper to make a cigarette product. In order to distinguish from the short tobacco threads of traditional cigarettes, the continuous tobacco threads made of the continuous reconstituted tobacco leaf will be collectively referred to as tobacco rods in the following.

[0068] The low-strength continuous reconstituted tobacco leaf is unfolded into a tobacco leaf sheet P, and the tobacco leaf sheet P is cut into a tobacco rod P’ (as shown inFigure 6 As shown in the figure, the cut tobacco strips P' are conveyed to the downstream process, and the tobacco strips P' are pushed into the circular strip of the tobacco base rod by the downstream process to form the tobacco base rod. The present application is directed to the cutting of the tobacco sheet P and the conveying of the tobacco strips P'. The process of pushing the tobacco strips P' into the circular strip of the tobacco base rod can be processed according to the prior art, and the embodiments of the present application will not be described in detail.

[0069] According to an embodiment of the present application, a manufacturing device of a heating cigarette tobacco strip comprises a unwinding unit 1, a curling unit 4, a cutting unit 2 and a feeding unit 3 arranged in sequence along the flow direction, and a cleaning device 5 arranged below the cutting unit 2.

[0070] In an embodiment of the present application, the flow direction refers to the direction of conveying the tobacco sheet P, i.e. the direction of the process flow. As shown in the figure, the flow direction in this embodiment is from right to left, and in some embodiments it can also be from left to right, which is set according to the actual processing condition. Figure 1 As shown in the figure, the flow direction in this embodiment is from right to left, and in some embodiments it can also be from left to right, which is set according to the actual processing condition.

[0071] After the low-strength rolled reconstituted tobacco is unwound into a tobacco sheet P by the unwinding unit 1, it enters the curling unit 4 to limit the twisting movement in the transverse direction of the tobacco sheet P, and then it is cut into multiple tobacco strips P' by the cutting unit 2. The cleaning device 5 performs efficient online automatic cleaning processing on the cutting unit 2, and the feeding unit 3 orderly transports the cut tobacco strips P' in a straight line and then sends them into the downstream equipment after gathering the ends.

[0072] As shown in the figure, the flow direction in this embodiment is from right to left, and in some embodiments it can also be from left to right, which is set according to the actual processing condition. Figure 2 As shown in the figure, the flow direction in this embodiment is from right to left, and in some embodiments it can also be from left to right, which is set according to the actual processing condition.

[0073] In an embodiment of the present application, the unwinding unit 1 comprises two reels 101, and the rolled reconstituted tobacco is wound on each of the two reels 101. In an embodiment of the present application, when the rolled reconstituted tobacco on one reel 101 is completely unwound (or nearly completely unwound), the rolled reconstituted tobacco on the other reel 101 is unwound and spliced with it, so that the unwound tobacco sheet P is continuously processed in the downstream process. Through the cyclic switching of the rolled reconstituted tobacco on the two reels 101, the tobacco sheet P is continuously supplied in an online splicing manner.

[0074] In some embodiments, only one reel can be provided, and the rolled reconstituted tobacco on the reel 101 is set according to the actual production scale.

[0075] According to an embodiment of the present application, the unwinding unit 1 further comprises a power machine 102, a rotating shaft 103, a connecting device 104 and a guide roller 105.

[0076] The rolled reconstituted tobacco on the roll 101 is wound on a rotating shaft 103, the rotating shaft 103 is connected with a power machine 102, the power machine 102 runs synchronously with the production speed of the equipment, and the rotating shaft 103 is driven to rotate adaptively, so that the rolled reconstituted tobacco on the roll 101 is unwound, and the rolled reconstituted tobacco on the roll 101 is unwound into a tobacco sheet P.

[0077] In the embodiment of the present application, the connecting device 104 splices the two tobacco sheets P unwound from the rolls 101 together, and the tobacco sheets P are conveyed to the curling unit 4 after being guided by the guide roller 105, so that the unwound tobacco sheet P has a constant tension.

[0078] According to the curling unit 4 of the present application, the unwound tobacco sheet P is corrugated in the transverse direction. In the embodiment of the present application, the longitudinal direction refers to the direction of the tobacco sheet P parallel to the flow direction, and the transverse direction refers to the direction of the tobacco sheet P perpendicular to the flow direction, as shown in Figure 2 .

[0079] As shown in Figure 1 , the curling unit 4 is a roller structure arranged in the transverse direction. A plurality of annular protrusions 401 are arranged on the outer circumference of the curling unit 4, as shown in Figure 17 . The plurality of annular protrusions 401 form a corrugated surface. When the tobacco sheet P is wrapped around the curling unit 4, the corrugated surface formed by the plurality of annular protrusions 401 causes the tobacco sheet P to be corrugated in the transverse direction, thereby limiting the twisting movement of the tobacco sheet P in the transverse direction.

[0080] The plurality of annular protrusions 401 arranged on the outer circumference of the curling unit 4 form a corrugated surface, which is transferred to the tobacco sheet P, causing the tobacco sheet P to be corrugated in the transverse direction. The corrugation of the tobacco sheet P cooperates with the corrugated surface of the curling unit 4 to fix the tobacco sheet P in the transverse direction. By selecting certain parameters of the corrugation of the tobacco sheet P in the transverse direction, the curling unit 4 can generate a desired transverse resistance when the tobacco sheet P moves in the transverse direction, and in a reaction force manner, when the cutting unit 2 cuts the tobacco sheet P, each cutting point offsets the transverse tension deviation of the tobacco sheet P due to the inconsistent cutting resistance, eliminating the irregular local wrinkles of the tobacco sheet P in the cutting area, thereby improving the reliability of the cutting unit 2 in cutting the tobacco sheet P.

[0081] As shown in Figure 3 , a structural diagram of the cutting unit of the present application, Figure 4 , a schematic diagram of the first disc cutter and the second disc cutter meshing with each other, according to the embodiment of the present application, the cutting unit 2 is used for cutting the tobacco sheet P into a plurality of tobacco strips P' in the longitudinal direction.

[0082] The cutting unit 2 comprises a cutter holder 201, a driving motor 210, and a first cutter roller 202 and a second cutter roller 203 arranged in a transverse direction. The first cutter roller 202 and the second cutter roller 203 are mounted on the cutter holder 201, and the driving motor 210 drives the first cutter roller 202 and the second cutter roller 203 to rotate in a direction opposite to the running speed of the device. In an embodiment, the driving motor 210 drives the first cutter roller 202 and the second cutter roller 203 to rotate in the opposite direction by means of gear transmission.

[0083] A plurality of first disc cutters 204 are arranged alternately on the first cutter roller 202, and a plurality of second disc cutters 206 are arranged alternately on the second cutter roller 203. The plurality of first disc cutters 204 and the plurality of second disc cutters 206 are engaged with each other, so as to cut the tobacco leaf sheet P conveyed to the cutting unit 2 into a plurality of tobacco strips P' in a longitudinal direction, while conveying the plurality of tobacco strips P' cut to the flow direction.

[0084] Specifically, the first disc cutters 204 form first cutting surfaces 208 on both sides thereof, and the second disc cutters 206 form second cutting surfaces 209 on both sides thereof. A plurality of first annular cutter grooves 205 are formed between the plurality of first disc cutters 204 arranged alternately, and a plurality of second annular cutter grooves 207 are formed between the plurality of second disc cutters 206 arranged alternately.

[0085] The plurality of first disc cutters 204 are embedded in the plurality of second annular cutter grooves 207, and the plurality of second disc cutters 206 are embedded in the plurality of first annular cutter grooves 205, so as to realize the engagement between the plurality of first disc cutters 204 and the plurality of second disc cutters 206.

[0086] The tobacco leaf sheet P enters a cutting area (engagement area) of the first disc cutters 204 and the second disc cutters 206, and the starting point of the cutting area between the first disc cutters 204 and the second disc cutters 206 is clamped and fixed. The outer circumferential surface of the first disc cutters 204 gradually extrudes the tobacco leaf sheet P into the second annular cutter grooves 207, and the outer circumferential surface of the second disc cutters 206 gradually extrudes the tobacco leaf sheet P into the first annular cutter grooves 205, so as to tear the tobacco leaf sheet P between the first cutting surface 208 and the adjacent second cutting surface 209, thereby realizing cutting, Figure 5 A schematic view of the tobacco leaf sheet conveyed to the cutting unit of the present application is shown, Figure 6 A schematic view of the tobacco leaf sheet cut into a plurality of tobacco strips of the present application is shown.

[0087] In some embodiments, the distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s = 0 to 0.08 mm. At the starting point of each cutting area, the tobacco leaf material P is clamped and fixed, and cutting is achieved by tearing the tobacco leaf material P through the first cutting surface 208 of the first disc cutter 204 and the second cutting surface 209 of the second disc cutter 206. The distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s = 0 to 0.08 mm. When cutting tobacco leaf material P made of low-strength flexible material, the cutting force is minimized under this gap, resulting in a higher quality cut tobacco strip P'.

[0088] According to an embodiment of the present invention, a support assembly 211 is provided between the first cutter roller 202 and the second cutter roller 203. The support assembly 200 is configured such that, in the cutting areas of the first disc cutter 204 and the second disc cutter 206, the multiple cut tobacco strips P' alternately wrap around the outer circumferential surfaces of the first disc cutter 204 and the second disc cutter 206.

[0089] Specifically, the support assembly 211 includes a plurality of first air guide blocks 2111 and a plurality of second air guide blocks 2112, wherein the second air guide block 2112 is disposed between the first disc cutter 204 and the corresponding second annular cutter groove 207, and the first air guide block 2111 is disposed between the second disc cutter 206 and the corresponding first annular cutter groove 205. In some embodiments, the plurality of first air guide blocks 2111 and the plurality of second air guide blocks 2112 are fixed to the cutter holder 201 by a connector (not shown in the figure).

[0090] like Figure 7 The figure shown is a cross-sectional schematic diagram of the first air guide block in one embodiment of the present invention. Figure 8 The diagram shows the first air guide block of the present invention placed between the second disc cutter and the corresponding first annular cutter groove. The first air guide block 2111 includes a first air inlet 2113 and a first air outlet 2113', and the first air guide block 2111 has a first air blowing groove 2114.

[0091] The first air-blowing groove 2114 is located in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206, facing the second disc cutter 206.

[0092] like Figure 9 The figure shown is a cross-sectional schematic diagram of the second air guide block in one embodiment of the present invention. Figure 10 The diagram shows the second air guide block of the present invention placed between the first disc cutter and the corresponding second annular cutter groove. The second air guide block 2112 includes a second air inlet 2115 and a second air outlet 2115', and the second air guide block 2112 has a second air blowing groove 2116.

[0093] A second air blowing groove 2116 is arranged at the cutting area of the first disc cutter 204 and the second disc cutter 206, and faces the first disc cutter 204.

[0094] As shown in Figure 11 the absence of the supporting assembly, the movement trajectory of the tobacco sheet cut into a tobacco rod is shown in FIG. 6. In the absence of the supporting assembly 211, the tobacco sheet P is fed from the feeding point O1, and the cut tobacco rod P' is guided out from the guiding-out point O2. After the second disc cutter 206 is pressed into the first annular cutter groove 205 to cut the tobacco sheet P, the cut tobacco rod P' deviates upward from the rotation center O of the second disc cutter 206 at the guiding-out point, and the linear speed of the cut tobacco rod P' changes.

[0095] Similarly, after the first disc cutter 204 is pressed into the second annular cutter groove 207 to cut the tobacco sheet P, the cut tobacco rod P' deviates downward from the rotation center of the first disc cutter 204 at the guiding-out point, and the linear speed of the cut tobacco rod P' changes.

[0096] In order to solve the change of the linear speed of the cut tobacco rod P', the supporting assembly 211 is arranged between the first cutter roller 202 and the second cutter roller 203.

[0097] As shown in Figure 12 the first air flow guide block is arranged between the second disc cutter and the corresponding first annular cutter groove, the cutting unit cuts the tobacco sheet, as shown in Figure 13 the first air flow guide block is arranged between the second disc cutter and the corresponding first annular cutter groove, the movement trajectory of the tobacco sheet cut into a tobacco rod is shown in FIG. 8, Figure 14 the second disc cutter cuts the tobacco sheet, as shown in FIG. 9. The tobacco sheet P is fed from the feeding point O1. When the second disc cutter 206 is pressed into the first annular cutter groove 205 to cut the tobacco sheet P, the first air inlet hole 2113 of the first air flow guide block 2111 inputs compressed air. At the cutting area of the first disc cutter 204 and the second disc cutter 206, the compressed air is blown downward by the first air blowing groove 2114 to press the cut tobacco rod P'.

[0098] After the second disc cutter 206 is pressed into the first annular cutter groove 205 to cut the tobacco sheet P, the compressed air is blown out from the first air outlet hole 2113' of the first air flow guide block 2111. At the guiding-out area, the compressed air is blown downward to press the cut tobacco rod P'.

[0099] In the cutting areas of the first disc cutter 204 and the second disc cutter 206, the first air-blowing groove 2114 blows air downwards to compress the tobacco strip P', and in the outlet area, compressed air blows air downwards to compress the tobacco strip P', thereby causing the multiple cut tobacco strips P' to wrap around the outer circumference of the second disc cutter 206 in the cutting areas of the first disc cutter 204 and the second disc cutter 206.

[0100] From the feed point O1 to the output point O2, the tobacco stick P' wraps around the outer circumference of the second disc cutter 206. Within the cutting area between the feed point O1 and the output point O2, the tobacco stick P' rotates synchronously against the outer circumference of the second disc cutter 206. After cutting, the distance between the output point O2 and the rotation center O of the second disc cutter 206 remains unchanged. According to the formula V = 2πRn, with no change in rotational speed n and radius R, its linear velocity also remains unchanged. Therefore, the first air guide block 2111 is extremely beneficial for the stable delivery of the tobacco stick P'.

[0101] Similarly, such as Figure 15 The diagram shows the cutting unit cutting tobacco sheet when a second air guide block is provided between the first disc cutter and the corresponding second annular groove of the present invention. Figure 16 The diagram shows the first disc cutter of the present invention cutting tobacco sheet. When the first disc cutter 204 is pressed into the second annular groove 207 to cut the tobacco sheet P, compressed air is input into the second air inlet 2115 of the second air guide block 2112. In the cutting area between the first disc cutter 204 and the second disc cutter 206, the compressed air blows upward from the second air blowing groove 2116 to compress the tobacco strip P'.

[0102] When the first disc cutter 204 is pressed into the second annular cutter groove 207 to cut the tobacco leaf material P, compressed air is blown out from the second air outlet 2115' of the second air guide block 2112. In the outlet area, the compressed air blows upward to compress the tobacco strip P'.

[0103] By blowing air upwards onto the tobacco stick P' through the second air-blowing groove 2116 and compressing air upwards onto the tobacco stick P' in the outlet area, the multiple tobacco sticks P' after being cut are wrapped around the outer circumference of the first disc cutter 204 in the cutting areas of the first disc cutter 204 and the second disc cutter 206.

[0104] From the feeding point O1 to the leading-out point O2, the tobacco rod P' wraps the outer circumferential surface of the first disc cutter 204, and the tobacco rod P' between the feeding point O1 and the leading-out point O2 synchronously rotates in close contact with the outer circumferential surface of the first disc cutter 204, and the cut tobacco rod P' at the leading-out point O2 has no change in distance from the rotation center of the first disc cutter 204. According to the formula V = 2πRn, the rotation speed n and the radius R do not change, and the linear speed also does not change, and the stable conveying of the second air guide block 2112 to the tobacco rod P' is extremely advantageous.

[0105] The support assembly 211 is arranged between the first cutter roller 202 and the second cutter roller 203, and the cut multiple tobacco rods P' alternately wrap the outer circumferential surface of the first disc cutter 204 and the outer circumferential surface of the second disc cutter 206 in the cutting area of the first disc cutter 204 and the second disc cutter 206, so that the cut multiple tobacco rods P' can be more flat in the same plane, as shown in Figure 6 The support assembly 211 is arranged between the first cutter roller 202 and the second cutter roller 203, and the tobacco rod P' not only gets good flexible support, but also has consistent linear speed in the cutting process, effectively improves the cutting size precision, greatly reduces the broken filament rate of the cut tobacco rod P', improves the cutting size precision, and improves the continuous production efficiency of the equipment.

[0106] In some embodiments, on the side where the tobacco leaf sheet P is introduced into the cutting unit 2, the head of the first air guide block 2111 and the head of the second air guide block 2112 are offset in directions away from each other, so as to ensure that the tobacco leaf sheet P smoothly enters the cutting unit 2 for cutting.

[0107] Figure 17 As shown in the structural schematic diagram of the curling unit of the present application, the curling unit 4 is arranged between the unwinding unit 1 and the cutting unit 2, and is located upstream of the cutting unit 2. In an embodiment, the distance A between the connecting line of the shaft center of the first cutter roller 202 and the shaft center of the second cutter roller 203 is 0.5-1.5 times the transverse width of the tobacco leaf sheet P, and the wrapping angle β of the tobacco leaf sheet P on the curling unit 4 is adjusted to be 60°-180° through the guide roller 105.

[0108] In a further embodiment, the distance A between the connecting line of the shaft center of the first cutter roller 202 and the shaft center of the second cutter roller 203 is 50mm-150mm.

[0109] As shown in the structural schematic diagram of the feeding unit of the present application, Figure 18 As shown in the structural schematic diagram of the feeding unit of the present application, Figure 19The first traction roller of the present application is shown in the schematic diagram of the gap between the outer circumference of the first traction roller and the outer circumference of the second traction roller. The cutting unit 2 is arranged on the downstream side of the feeding unit 3. The cut cigarette P' is flatly conveyed to the feeding unit 3. The feeding unit 3 is used to pull a plurality of cigarettes P' along the flow direction for flat transmission. The feeding unit 3 extends from the cigarette P' exit point of the cutting unit 2 to the inlet end of the downstream equipment.

[0110] The feeding unit 3 includes at least one set of traction roller pairs, a first planar groove plate 305, a second planar groove plate 306, a converging funnel 301, a motor 304, and a negative pressure nozzle 307.

[0111] The traction roller pair includes a first traction roller 302 and a second traction roller 303. At least one strip-shaped groove 3021 is opened on the surface of the first traction roller 302 along the axial direction of the first traction roller 302. The gap C between the outer circumference of the first traction roller 302 and the outer circumference of the second traction roller 303 is smaller than the thickness of the cigarette P', and when the first traction roller 302 rotates to the position where the strip-shaped groove 3021 faces the second traction roller 303, the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second traction roller 303 is greater than the thickness of the cigarette P'.

[0112] The mounting axis of the first traction roller 302 is parallel to the axis of the first knife roller 202, and the mounting axis of the second traction roller 303 is parallel to the axis of the second knife roller 203. The gap C between the first traction roller 302 and the second traction roller 303 is slightly smaller than the thickness of the cigarette P', and when the cigarette P' enters the gap between the first traction roller 302 and the second traction roller 303, a certain pressure is formed on the cigarette P'. The motor 304 drives the first traction roller 302 and the second traction roller 303 to rotate towards each other, and is consistent with the production speed of the equipment. The traction roller 302 and the second traction roller 303 are driven by the clamping force to advance the cigarette P'.

[0113] When the strip-shaped groove 3021 of the first traction roller 302 rotates to the traction position of the cigarette P' (the strip-shaped groove 3021 faces the second traction roller 303), the gap C between the outer circumference of the first traction roller 302 and the outer circumference of the second traction roller 303 increases to the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second traction roller 303 (greater than the thickness of the cigarette P'), at this time the first traction roller 302 and the second traction roller 303 have no pressure on the cigarette P', and the cigarette P' can slide back and forth between the first traction roller 302 and the second traction roller 303.

[0114] According to the embodiment of the present application, the first and second flat groove plates 305 and 306 are arranged on both sides of the pair of traction rollers, and the bottom surfaces of the first and second flat groove plates 305 and 306 are respectively provided with a plurality of dust suction holes. The converging funnel 301 is arranged on the downstream side of the second flat groove plate 306, and the first flat groove plate 305 extends between the first and second knife rollers 202 and 203. Figure 20 As shown in the cross-sectional view of the converging funnel of the present application, the converging funnel 301 is internally provided with a Venturi tube structure. The converging funnel 301 is provided with a nozzle 308 for introducing compressed air into the Venturi tube structure inside the converging funnel 301.

[0115] The inlet end of the converging funnel 301 is square-shaped, facilitating the entry of the cigarette rod P'. The outlet end of the converging funnel 301 is gradually tapered to a circular shape, for gathering the cigarette rod P'. After the plurality of cigarette rods P' are gathered, they are transported to the downstream equipment from the outlet end of the converging funnel 301.

[0116] Specifically, the nozzle 308 continuously supplies air to the Venturi tube structure inside the converging funnel 301, so that a negative pressure is generated at the outlet end of the converging funnel 301. Under the action of the pressure difference, the converging funnel 301 continuously sucks in the cigarette rod P' conveyed by the first and second traction rollers 302 and 303, and gathers the cigarette rod P'. After the plurality of cigarette rods P' are gathered, they are transported to the downstream equipment from the outlet end of the converging funnel 301.

[0117] It is advantageous to pre-gather the flat cigarette rod P' before forming the tobacco base rod. For example, pre-gathering can enable the cigarette rod P' to be pushed into the circular rod of the tobacco base rod with smaller forming resistance, and further enable the cigarette rods P' on both sides to move slowly towards the central axis of the circular rod of the tobacco base rod, thereby better facilitating the parallel arrangement of the cigarette rod P' in the circular rod of the tobacco base rod.

[0118] In some embodiments, the diameter of the minimum cross-sectional position of the Venturi tube structure inside the converging funnel 301 is 1.5 to 3 times the diameter of the circular rod of the tobacco base rod.

[0119] It is essentially difficult to guide the soft and weak cigarette rod P' from the plurality of first and second annular knife grooves 205 and 207 of the cutting unit 2. The first and second traction rollers 302 and 303 can stably maintain the pre-tightening force applied to the cigarette rod P' during equipment operation, which can ensure the straight and orderly conveying of the cigarette rod P', facilitate the parallel distribution of the cigarette rod P' after subsequent lateral gathering, maintain the flat posture of the cigarette rod P', and effectively guide the cigarette rod P' from the cutting unit 2 smoothly.

[0120] However, objectively, the first traction roller 302 and the second traction roller 303, and the plurality of first annular cutter grooves 205 and the plurality of second annular cutter grooves 207 cannot completely achieve the same linear speed due to manufacturing and control precision. Therefore, when the cigarette rod P' is conveyed without sliding between the first traction roller 302 and the second traction roller 303, and the plurality of first annular cutter grooves 205 and the plurality of second annular cutter grooves 207, an accumulated error is generated, and the error exceeding a certain value will cause the cigarette rod P' to break, cause winding and disordered arrangement, and seriously restrict the equipment efficiency and the production quality of finished products.

[0121] The surface of the first traction roller 302 is provided with at least one strip-shaped groove 3021 along the axial direction of the first traction roller 302, the gap C between the outer circumferences of the first traction roller 302 and the second traction roller 303 is smaller than the thickness of the cigarette rod P', and when the first traction roller 302 rotates to the position where the strip-shaped groove 3021 faces the second traction roller 303, the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second traction roller 303 is greater than the thickness of the cigarette rod P'.

[0122] The converging funnel 301 is arranged on the downstream side of the second planar groove plate 306, a Venturi tube structure inside the converging funnel 301 continuously provides compressed air through the nozzle 308 to generate negative pressure at the outlet end of the converging funnel 301, and the cigarette rod P' is continuously and flexibly pulled during operation under the action of the pressure difference, and further, when the strip-shaped groove 3021 of the first traction roller 302 rotates to the traction position of the cigarette rod P' (the strip-shaped groove 3021 faces the second traction roller 303), the cigarette rod P' can be self-adaptively slid forward and backward between the first traction roller 302 and the second traction roller 303, thereby eliminating the accumulated error of the conveying.

[0123] The accumulated error of the conveying is eliminated by adjusting the flexible pulling force of the cigarette rod P' in the converging funnel 301, so that the cigarette rod P' can be self-adaptively slid forward and backward under the negative pressure traction when passing through the gap C1 between the strip-shaped groove 3021 of the first traction roller 302 and the outer circumference of the second traction roller 303, thereby avoiding the breakage of the cigarette rod P', winding and disordered arrangement.

[0124] In some embodiments, a buffer is arranged between the outlet end of the converging funnel 301 and the downstream equipment, so that the cigarette rod P' is stably conveyed to the downstream equipment, for example, a certain buffer amount is formed by speed control, and the buffer amount can be used for compensation of the conveying error of the cigarette rod P'.

[0125] According to the embodiments of the present application, when the plurality of cigarette rods P' is conveyed to the feeding unit 3, the plurality of cigarette rods P' is conveyed above the first planar groove plate 305 and the second planar groove plate 306. In some embodiments, the distance between the plurality of cigarette rods P' and the upper surface of the first planar groove plate 305 and the second planar groove plate 306 is 0-1 mm.

[0126] In a further embodiment, the distance between the plurality of tobacco strips P' and the upper surfaces of the first and second planar grooved plates 305, 306 is adjustable.

[0127] In a further embodiment, the plurality of tobacco strips P' are in slight contact with the upper surfaces of the first and second planar grooved plates 305, 306 when the plurality of tobacco strips P' are tensioned.

[0128] Due to the low strength, high flexibility and easy breakage of the plurality of tobacco strips P', it is necessary to provide certain support to the plurality of tobacco strips P' to facilitate the conveying of the plurality of tobacco strips P'. The first and second planar grooved plates 305, 306 provide certain support to the plurality of tobacco strips P' to facilitate the conveying of the plurality of tobacco strips P'.

[0129] Due to the need for slight tensioning of the plurality of tobacco strips P' during conveying, the plurality of tobacco strips P' will inevitably vibrate when conveyed at high speed, which will inevitably cause breakage of individual tobacco strips P'. The first and second planar grooved plates 305, 306 can effectively suppress the vibration of the plurality of tobacco strips P' by supporting the plurality of tobacco strips P'.

[0130] In addition, due to manufacturing and control precision, the linear speed of the first and second traction rollers 302, 303 and the plurality of first and second annular cutter grooves 205, 207 cannot be completely consistent. Breakage of the plurality of tobacco strips P' between the pair of traction roller sets and the cutting unit cannot be completely avoided. The first and second planar grooved plates 305, 306 support the plurality of tobacco strips P', the front section of the broken tobacco strip P' is kept conveying forward by the flexible traction of the collecting funnel 301. The rear section of the broken tobacco strip P' is pulled forward by the friction force generated by the surrounding normal tobacco strips P', and the head of the rear section of the broken tobacco strip P' is pulled forward again after passing through the first and second traction rollers 302, 303 to establish tensioning force again to achieve flat and orderly conveying. The broken tobacco strip P' can be maintained on the predetermined path of the plurality of tobacco strips P' to avoid irreversible loss of material.

[0131] According to the embodiments of the present application, the bottom surfaces of the first and second planar grooved plates 305, 306 are provided with a plurality of dust suction holes, which are connected to a negative pressure suction nozzle 307 and a negative pressure fan 507 (described below) to timely suck away waste (dust, tobacco dust, etc.) on the upper surfaces of the first and second planar grooved plates 305, 306.

[0132] In one embodiment, the plurality of dust suction holes provided on the bottom surfaces of the first and second planar grooved plates 305, 306 have a diameter of less than 2 mm.

[0133] The present application performs cleaning during the cutting of the tobacco sheet P and the conveying of the plurality of tobacco strips P', such as Figure 21The first air jet device of the present application is shown in the structural schematic diagram, Figure 22 The second air jet device of the present application is shown in the structural schematic diagram, Figure 23 The cleaning device of the present application is shown in the structural schematic diagram, the manufacturing device of the heated cigarette rod provided by the present application further comprises a cleaning device 5, which is arranged below the cutting unit 2.

[0134] The cleaning device 5 comprises a first air jet device 501A, a second air jet device 501B, a first plasma nozzle 504A, a second plasma nozzle 504B, a plasma generator 503, a collection groove 509, a collection box 508, a negative pressure conveying pipeline 505, a filter 506, and a negative pressure fan 507.

[0135] The first air jet device 501A is installed on the knife holder 201, and a first comb-type scraper 502A is installed on the first air jet device 501A. The first comb-type scraper 502A is located on one side of the first knife roller 202 and is embedded in a plurality of first annular knife grooves 205 formed between a plurality of alternately arranged first disc-type cutters 204. The first comb-type scraper 502A scrapes off the sticky waste (dust, tobacco dust, etc.) in the first annular knife grooves 205. The first air jet device 501A cleans the first annular knife grooves 205 by means of high-speed airflow combined with the first comb-type scraper 502A.

[0136] The first air jet device 501A is provided with a first air inlet 501A1, and a first air outlet (not shown in the figure) is arranged between the gaps of the first comb-type scraper 502A. The first air inlet 501A1 of the first air jet device 501A introduces high-speed airflow to clean the first annular knife grooves 205 and remove the waste (dust, tobacco dust, etc.) in the first annular knife grooves 205.

[0137] Similarly, the second air jet device 501B is installed on the knife holder 201, and a second comb-type scraper 502B is installed on the second air jet device 501B. The second comb-type scraper 502B is located on one side of the second knife roller 203 and is embedded in a plurality of first annular knife grooves 207 formed between a plurality of alternately arranged second disc-type cutters 206. The second comb-type scraper 502B scrapes off the sticky waste (dust, tobacco dust, etc.) in the first annular knife grooves 205. The second air jet device 501B cleans the second annular knife grooves 207 by means of high-speed airflow combined with the second comb-type scraper 502B.

[0138] The second air jet device 501B is provided with a second air inlet 501B1 and a second air blowing port (not shown in the figure) between the gaps of the second comb-shaped scraper 502B. The second air inlet 501B1 of the second air jet device 501B introduces a high-speed airflow to clean the second annular knife groove 207 and remove the waste (dust, cigarette ends, etc.) in the second annular knife groove 207.

[0139] The plasma generator 503 is connected to the first plasma nozzle 504A and the second plasma nozzle 504B, which are located on the other side of the first knife roller 202 and the second knife roller 203, respectively. The first plasma nozzle 504A is opposite to the first annular knife groove 205, and the second plasma nozzle 504B is opposite to the second annular knife groove 207. The first plasma nozzle 504A and the second plasma nozzle 504B are installed on the knife holder 201.

[0140] The plasma generator 503 introduces the plasma gas containing active atomic oxygen into the first annular knife groove 205 and the second annular knife groove 207 through the first plasma nozzle 504A and the second plasma nozzle 504B, respectively, to further clean the parts that cannot be processed by the first air jet device 501A, the second air jet device 501B, the first comb-shaped scraper 502A, and the second comb-shaped scraper 502B.

[0141] The collection tank 509 is located below the second disc cutter 206, and the collection box 508 is located below the collection tank 509 and is connected to the collection tank 509 through a pipeline. The negative pressure conveying pipeline 505 is connected to the collection box 508 and the negative pressure fan 507, and a filter 506 is arranged on the negative pressure conveying pipeline 505.

[0142] The waste (dust, cigarette ends, etc.) falling from the first annular knife groove 205 after cleaning falls onto the first flat recessed plate 305, and the waste (dust, cigarette ends, etc.) falling from the second annular knife groove 207 after cleaning falls into the collection tank 509. The negative pressure fan 507 draws air to generate negative pressure in the collection box 508. The waste (dust, cigarette ends, etc.) enters the collection box 508 from the collection tank 509 and the bottom of the first flat recessed plate 305. At the same time, a filter 506 is arranged on the negative pressure conveying pipeline 505 to filter the waste (dust, cigarette ends, etc.) in the gas during the air pumping process, so as to prevent the waste from being pumped out of the collection box 508.

[0143] The negative pressure fan 507 is connected to the negative pressure suction nozzle 307. The negative pressure fan 507 draws air to timely suck away the waste (dust, cigarette ends, etc.) on the upper surfaces of the first flat recessed plate 305 and the second flat recessed plate 306.

[0144] According to an embodiment of the present application, a cleaning method for a high-viscosity tobacco sheet cutting unit 2 is provided, and a cleaning device 5 for a high-viscosity tobacco sheet cutting unit 2 is provided to clean the cutting unit 2, comprising:

[0145] Preliminary cleaning.

[0146] The tobacco sheet P is conveyed to the cutting unit 2, and the cutting unit 2 cuts the tobacco sheet P into a plurality of tobacco strips P' along the longitudinal direction;

[0147] The first and second comb-shaped scrapers 502A and 502B of the cleaning device 5, in combination with the high-speed air flow introduced by the first and second air jet devices 501A and 501B, clean the first and second annular knife grooves 205 and 207.

[0148] The waste falling after the first annular knife groove 205 is cleaned falls onto the first flat recessed plate 305; the waste falling after the second annular knife groove 207 is cleaned falls into the collection groove 509.

[0149] Further cleaning.

[0150] The plasma generator 503 of the cleaning device 5 generates plasma, and the plasma is introduced into the first and second annular knife grooves 205 and 207 through the first and second plasma nozzles 504A and 504B, so as to further clean the first and second annular knife grooves 205 and 207.

[0151] Waste collection.

[0152] The negative pressure fan 507 of the cleaning device 5 generates negative pressure, and the waste falling into the collection groove 509 is collected into the collection box 508.

[0153] Further, the negative pressure fan 507 draws air to generate negative pressure in the collection box 508, and the waste enters the collection box 508 from the collection groove 509 and the bottom of the first flat recessed plate 305.

[0154] According to an embodiment of the present application, a manufacturing method of a heating-type cigarette tobacco strip is provided, and a manufacturing device of a heating-type cigarette tobacco strip is provided to manufacture the heating-type cigarette tobacco strip, comprising the following steps:

[0155] 1) Unfold the roll-type reconstituted tobacco leaf into a tobacco sheet P, and make the unfolded tobacco sheet P have a constant tension.

[0156] The rolled reconstituted tobacco leaves on the drum 101 are wound on the rotating shaft 103, which is connected to the power unit 102. The power unit 102 synchronously tracks the production speed of the equipment and adaptively drives the rotating shaft 103 to rotate, thereby unfolding the rolled reconstituted tobacco leaves on the drum 101. The rolled reconstituted tobacco leaves on the drum 101 are unfolded into tobacco leaf material P, which is guided by the guide roller 105 and then conveyed to the curling unit 4, so that the unfolded tobacco leaf material P has a constant tension.

[0157] 2) The unfolded tobacco leaf material P is conveyed to the curling unit 4. The curling unit 4 causes the tobacco leaf material P to bend laterally through the corrugated surface formed by the annular protrusion.

[0158] 3) The tobacco leaf material P is conveyed to the cutting unit 2, and the cutting unit 2 cuts the tobacco leaf material P longitudinally into multiple tobacco strips P'.

[0159] In the cutting area of ​​the first disc cutter 204 and the second disc cutter 206 of the cutting unit 2, multiple cut tobacco strips P' alternately wrap around the outer circumference of the first disc cutter 204 and the outer circumference of the second disc cutter 206.

[0160] During the process of cutting tobacco leaf material P longitudinally into multiple tobacco strips P' by cutting unit 2, cleaning device 5 cleans cutting unit 2, including the following steps:

[0161] 31) Initial cleaning.

[0162] The first comb-shaped scraper 502A and the second comb-shaped scraper 502B of the cleaning device 5, together with the high-speed airflow introduced by the first air jet device 501A and the second air jet device 501B, clean the first annular groove 205 and the second annular groove 207 respectively.

[0163] When the first cutter roller 202 and the second cutter roller 203 rotate circumferentially, the waste (dust, soot, etc.) attached to the first annular cutter groove 205 and the second annular cutter groove 207 are mechanically squeezed by the stationary first comb-type scraper 502A and the second comb-type scraper 502B, thereby achieving chip removal. Combined with the high-speed airflow introduced by the first air jet device 501A and the second air jet device 501B, the scraped waste (dust, soot, etc.) is removed from the first annular cutter groove 205 and the second annular cutter groove 207.

[0164] 32) Clean again.

[0165] The plasma generator 503 of the cleaning device 5 generates plasma, and introduces the plasma into the first annular groove 205 and the second annular groove 207 through the first plasma nozzle 504A and the second plasma nozzle 504B respectively, to perform a deep cleaning of the first annular groove 205 and the second annular groove 207 again.

[0166] The active atomic oxygen in the plasma can rapidly oxidize the main sticky substance components in the reconstituted tobacco leaf, such as pectin, propylene glycol, glycerol, and spices, into volatile gases or perform modification treatment, thereby greatly reducing the stickiness of the tobacco dust in the first annular knife groove 205 and the second annular knife groove 207. In this way, the waste (dust, tobacco dust, etc.) on the part that cannot be cleaned by the first comb-shaped scraper 502A and the first air jet device 501A in the first annular knife groove 205 and the second comb-shaped scraper 502B and the second air jet device 501B in the second annular knife groove 207 is avoided from condensing, and the waste (dust, tobacco dust, etc.) is automatically removed under the action of gravity.

[0167] 33) Waste collection.

[0168] The negative pressure fan 507 of the cleaning device 5 generates negative pressure to collect the waste falling into the collection groove 509 and the bottom of the first planar recessed plate 305 into the collection box 508.

[0169] 4) The plurality of tobacco rods P' are conveyed to the feeding unit 3, compressed air is applied in the converging hopper 301 of the feeding unit 3, and the plurality of tobacco rods P' are conveyed flat in the flow direction by the first traction roller 302 and the second traction roller 303 of the feeding unit 3.

[0170] During the flat conveying of the plurality of tobacco rods P' by the feeding unit 3 in the flow direction, compressed air is applied in the converging hopper 301, and the plurality of tobacco rods P' are pulled by the first traction roller 302 and the second traction roller 303 of the feeding unit 3. At least one strip-shaped groove 3021 is formed on the surface of the first traction roller 302 along the axial direction of the first traction roller 302, the gap C between the outer circumference of the first traction roller 302 and the outer circumference of the second traction roller 303 is smaller than the thickness of the tobacco rod P', and when the first traction roller 302 rotates to the position where the strip-shaped groove 3021 faces the second traction roller 303, the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second traction roller 303 is greater than the thickness of the tobacco rod P'. When the tobacco rod P' passes between the strip-shaped groove 3021 of the first traction roller 302 and the gap C1 of the outer circumference of the second traction roller 303, it can slide forward and backward under the action of negative pressure traction, thereby eliminating the cumulative error of the conveying.

[0171] During the flat conveying of the plurality of tobacco rods P' by the feeding unit 3 in the flow direction, the negative pressure fan 507 draws air to timely suck away the waste (dust, tobacco dust, etc.) on the upper surfaces of the first planar recessed plate 305 and the second planar recessed plate 306 through the negative pressure suction nozzle 307.

[0172] The following points need to be explained:

[0173] (1) The drawings of the embodiments of the present application only relate to the structures involved in the embodiments of the present application, and other structures can be referred to the general design.

[0174] (2) In the drawings used to describe the embodiments of the present application, the thickness of a layer or region is exaggerated or reduced for clarity, i.e., the drawings are not drawn according to the actual scale. It can be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, it can be "directly" on or under the other element or there can be an intermediate element.

[0175] (3) In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0176] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cleaning device for a high tack tobacco leaf sheet cutting unit, characterized by, The cleaning device is arranged below the cutting unit, a feeding unit is arranged on the downstream side of the cutting unit; the cleaning device comprises a first air jet device, a second air jet device and a collecting groove; A first comb-type scraper is mounted on the first air jet device, and a second comb-type scraper is mounted on the second air jet device, The first air jet device cleans the cutting unit by high-speed airflow combined with the first comb-type scraper; The second air jet device cleans the cutting unit by high-speed airflow combined with the second comb-type scraper; The cutting unit comprises a first knife roller and a second knife roller, a plurality of first disc cutters are arranged on the first knife roller in an alternating manner, a plurality of second disc cutters are arranged on the second knife roller in an alternating manner, the plurality of first disc cutters and the plurality of second disc cutters are in meshing relationship, a plurality of first annular knife grooves are formed between the plurality of first disc cutters arranged in an alternating manner, and a plurality of second annular knife grooves are formed between the plurality of second disc cutters arranged in an alternating manner; a supporting assembly is arranged between the first knife roller and the second knife roller, and the supporting assembly is configured to wrap the plurality of tobacco rods after being cut in an alternating manner around the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter in a cutting area of the first disc cutter and the second disc cutter; The feeding unit comprises a first planar recessed groove plate, the first planar recessed groove plate extends between the first knife roller and the second knife roller, and a plurality of dust suction holes are formed in the bottom surface of the first planar recessed groove plate; The collecting groove is located below the second disc cutter, the first comb-type scraper is located on one side of the first knife roller and is embedded in the plurality of first annular knife grooves formed between the plurality of first disc cutters arranged in an alternating manner, the second comb-type scraper is located on one side of the second knife roller and is embedded in the plurality of second annular knife grooves formed between the plurality of second disc cutters arranged in an alternating manner, a first air blowing port is arranged between the gaps of the first comb-type scraper, and a second air blowing port is arranged between the gaps of the second comb-type scraper, so that the waste falling from the first annular knife groove after cleaning falls on the first planar recessed groove plate, and the waste falling from the second annular knife groove after cleaning falls into the collecting groove.

2. The cleaning device of claim 1, wherein, The first air jet device is provided with a first air inlet; The second air jet device is provided with a second air inlet.

3. The cleaning device of claim 1, wherein, The cleaning device further comprises a first plasma nozzle, a second plasma nozzle and a plasma generator, The plasma generator is connected to the first plasma nozzle and the second plasma nozzle, the first plasma nozzle faces the first annular knife groove, and the second plasma nozzle faces the second annular knife groove.

4. The cleaning device of claim 3, wherein, The cleaning device further comprises a collecting box, a negative pressure conveying pipeline, a filter and a negative pressure fan; The collecting box is located below the collecting groove and is connected to the collecting groove through a pipeline; The negative pressure conveying pipeline connects the collecting box and the negative pressure fan, and the filter is arranged on the negative pressure conveying pipeline.

5. The cleaning device of claim 4, wherein, The feeding unit further comprises a negative pressure suction nozzle, and the negative pressure fan is connected to the negative pressure suction nozzle.

6. The cleaning device of claim 5, wherein, The feeding unit further comprises a second planar recessed plate, a bottom surface of the second planar recessed plate is provided with a plurality of dust suction holes, and the plurality of dust suction holes are connected with the negative pressure fan through the negative pressure suction nozzle.

7. A cleaning method for a high tack tobacco sheet cutting unit characterized by, The method utilizes the cleaning device of any one of claims 1 to 6 to clean the cutting unit, comprising: primary cleaning, the tobacco sheet is conveyed to the cutting unit, and the cutting unit cuts the tobacco sheet into a plurality of tobacco strips along the longitudinal direction; the first comb-shaped scraper and the second comb-shaped scraper of the cleaning device, in combination with the high-speed airflow introduced by the first air jet device and the second air jet device, clean the first annular knife groove and the second annular knife groove; the waste falling from the first annular knife groove after cleaning falls onto the first planar recessed plate; and the waste falling from the second annular knife groove after cleaning falls into the collection groove; secondary cleaning, the plasma generator of the cleaning device generates plasma, and the plasma is introduced into the first annular knife groove and the second annular knife groove from the first plasma nozzle and the second plasma nozzle, so as to further clean the first annular knife groove and the second annular knife groove; waste collection; the negative pressure fan of the cleaning device generates negative pressure, and the waste falling into the collection groove is collected into the collection box.

8. The cleaning method according to claim 7, wherein, The negative pressure fan draws air, so that negative pressure is generated in the collection box, and the waste enters the collection box from the collection groove and the bottom of the first planar recessed plate.

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