A feeding device and feeding method for a low-intensity flexible continuous cigarette rod

Abstract

The present invention provides a feeding device and a feeding method for a low-strength flexible continuous cigarette rod, including at least one set of traction roller pairs, a first flat groove plate and a second flat groove plate, and the traction roller pair includes a first traction roller and a second traction roller; wherein, at least one strip groove is formed along the axial direction of the first traction roller on the surface of the first traction roller, and the gap between the outer circumferences of the first traction roller and the second traction roller is smaller than the thickness of the cigarette rod, and when the first traction roller rotates to make the strip groove face the second traction roller, the gap between the edge of the strip groove and the outer circumference of the second traction roller is larger than the thickness of the cigarette rod. The present invention is used for the orderly arrangement, transmission and feeding treatment of low-strength flexible continuous cigarette rods, so that the cigarette rods pushed into the circular rods of tobacco base rods are parallelly distributed along their axes and have consistent filling amount characteristics, and the production efficiency is higher, the material adaptability is wider, the appearance quality is better, and the smoking evaluation quality is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette blank manufacturing equipment, and particularly to a feeding device and a feeding method for a low-strength flexible continuous cigarette rod. Background Art

[0002] In the environment where cigarette products are constantly pursuing tar reduction and harm reduction, heat-not-burn cigarettes have developed rapidly in recent years due to their lower tar harm and excellent consumption experience. According to different heating methods, the existing heat-not-burn cigarettes are mainly divided into central heating type and surface heating type. The central heating type has more advantages in terms of the consistency of the smoke taste, the number of puffs, and the single puff smoke volume, and occupies an absolute dominant position in the market. The central 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-type cigarette. It is usually made by unfolding a rolled reconstituted tobacco leaf into a tobacco leaf sheet, and then wrapping it with cigarette paper after embossing, curling or cutting.

[0004] After the low-strength rolled reconstituted tobacco leaf sheet is cut by a cutting unit, a number of continuous infinitely long cigarette rods with the same width will be formed. The cigarette rods need to be continuously conveyed to the inlet end of the downstream forming device for the next production step. During the conveying process, the flat continuous cigarette rods need to be pushed into the circular rod of the tobacco base rod, and it is necessary to ensure that the distribution and filling amount of the cigarette rods in the circular rod of the tobacco base rod are consistent, and they are horizontally arranged and of the same length in the axial direction of the cigarette rods, so as to facilitate product use, heat transfer, and aerosol release. However, for the base rods manufactured by the existing known technologies, the arrangement and filling amount of the cigarette rods have great randomness, resulting in a relatively high rejection rate of the produced cigarettes.

[0005] On the other hand, the reconstituted tobacco used for the cigarette rods is a regenerated product made from waste tobacco substances such as tobacco dust, tobacco stems, and broken tobacco flakes during the cigarette manufacturing process, and adding certain plasticizers, binders, and humectants. Essentially, the material distribution of the tobacco leaf sheet is uneven in small local areas, and there are also differences in tensile strength. After being cut into several thin cigarette rods, the strength is even worse and it is very easy to break, which not only causes material loss, but also seriously affects the continuous conveying of the cigarette rods. At the same time, because the cigarette rods will generate a certain amount of dust during the conveying process due to friction with other devices, the dust will gradually accumulate into blocks, and some blocks will follow the cigarette rods into the downstream forming device, affecting the quality of its finished products. Therefore, it is necessary to timely remove the tobacco dust and dust on the conveying path of the cigarette rods. Summary of the Invention

[0006] The present invention provides a feeding device and a feeding method for low-strength flexible continuous tobacco strips, so as to solve the technical problems in the prior art that during the process of manufacturing tobacco base rods from rolled reconstituted tobacco leaf materials, the tobacco strips after cutting the tobacco leaf materials are prone to breakage, the randomness of the arrangement and filling amount of the tobacco strips results in a high rejection rate of the produced cigarettes, and a large amount of sticky powder is easily generated.

[0007] The technical solution provided by the present invention is as follows:

[0008] An object of the present invention is to provide a feeding device for low-strength flexible continuous tobacco strips, which is used for the orderly arrangement, transmission and feeding treatment of low-strength flexible continuous tobacco strips. The feeding device includes at least one set of traction roller pairs, a first flat groove plate and a second flat groove plate. The traction roller pair includes a first traction roller and a second traction roller;

[0009] Wherein, at least one strip groove is axially formed on the surface of the first traction roller along the axial direction of the first traction roller.

[0010] Wherein, the gap between the outer circumferences of the first traction roller and the second traction roller is smaller than the thickness of the tobacco strip, and when the strip groove of the first traction roller rotates to face the second traction roller, the gap between the edge of the strip groove and the outer circumference of the second traction roller is greater than the thickness of the tobacco strip.

[0011] In a preferred embodiment, the first flat groove plate and the second flat groove plate are arranged flatly on both sides of the traction roller pair, and a plurality of dust suction holes are respectively formed on the bottom surfaces of the first flat groove plate and the second flat groove plate;

[0012] When a plurality of tobacco strips are transmitted to the feeding device, the plurality of tobacco strips are transmitted above the first flat groove plate and the second flat groove plate.

[0013] In a preferred embodiment, the feeding device further includes a converging funnel, the converging funnel is arranged on the downstream side of the second flat groove plate, and the inside of the converging funnel has a Venturi tube structure;

[0014] The converging funnel is provided with a nozzle, and compressed air is introduced into the Venturi tube structure inside the converging funnel through the nozzle.

[0015] In a preferred embodiment, the diameter of the minimum cross-section position of the Venturi tube structure inside the converging funnel is 1.5 to 3 times the diameter of the circular strip of the tobacco base rod.

[0016] In a preferred embodiment, a plurality of the tobacco strips are transmitted above the first flat groove plate and the second flat groove plate, and the distance between the plurality of tobacco strips and the upper surfaces of the first flat groove plate and the second flat groove plate is 0 to 1 mm.

[0017] In a preferred embodiment, a plurality of the cigarette rods are conveyed above the first planar groove plate and the second planar groove plate, and the distance between the plurality of cigarette rods and the upper surfaces of the first planar groove plate and the second planar groove plate is adjustable.

[0018] In a preferred embodiment, a plurality of the cigarette rods are conveyed above the first planar groove plate and the second planar groove plate, and the plurality of cigarette rods are slightly in contact with the upper surfaces of the first planar groove plate and the second planar groove plate.

[0019] In a preferred embodiment, the feeding device further includes a negative pressure suction nozzle, and a plurality of dust suction holes are connected to a negative pressure fan through the negative pressure suction nozzle.

[0020] Another object of the present invention is to provide a feeding method for low-strength flexible continuous cigarette rods. By using the feeding device for low-strength flexible continuous cigarette rods provided by the present invention, cigarette rods are fed, including:

[0021] The first traction roller and the second traction roller rotate, and the cigarette rod enters the gap between the first traction roller and the second traction roller. The first traction roller and the second traction roller form a certain pressure on the cigarette rod, and the cigarette rod is pulled forward by the action of the clamping force.

[0022] The converging funnel introduces compressed air into the interior of the converging funnel in a Venturi tube structure through a nozzle to flexibly traction the cigarette rod.

[0023] Wherein, when the first traction roller rotates until the strip groove is facing the second traction roller, the cigarette rod passes through the gap between the strip groove of the first traction roller and the outer circumference of the second traction roller, and adaptively slides back and forth under the flexible traction of the converging funnel.

[0024] The converging funnel introduces compressed air into the interior of the converging funnel in a Venturi tube structure through a nozzle, sucks in a plurality of cigarette rods, and gathers the plurality of cigarette rods.

[0025] In a preferred embodiment, a plurality of cigarette rods are conveyed above the first planar groove plate and the second planar groove plate and are conveyed to the converging funnel for gathering.

[0026] The above technical solution of the present invention has at least the following beneficial effects compared with the prior art:

[0027] The present invention provides a feeding device and a feeding method for low-strength flexible continuous cigarette rods, which are used for the orderly arrangement, conveyance and feeding treatment of low-strength flexible continuous cigarette rods, so that the cigarette rods pushed into the circular strip of the tobacco base rod are parallelly distributed along their axes and have consistent filling amount characteristics, and have higher production efficiency, wider material adaptability, better appearance quality and higher smoking evaluation quality.

[0028] The present invention provides a feeding device and a feeding method for a low-strength flexible continuous cigarette rod. The converging funnel and the traction rollers provided in the feeding device cooperate to traction the cigarette rod, so that the cigarette rod can slide forward and backward adaptively at specific positions in each circle of a pair of traction rollers, eliminating the cumulative error of transmission and effectively reducing the situation of breakage of the cigarette rod during transmission.

[0029] The present invention provides a feeding device and a feeding method for a low-strength flexible continuous cigarette rod, which can greatly reduce the amount of broken filaments of the cigarette rod and lower transmission loss. Furthermore, the provided cigarette rod can be parallelly distributed along its axis in the circular rod of the tobacco-based rod formed by the downstream shaping device, thereby obtaining higher finished product consistency and improving production efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of a manufacturing device for a heated cigarette rod of the present invention.

[0032] Figure 2 It is a schematic structural diagram of the unwinding unit of the present invention.

[0033] Figure 3 It is a schematic structural diagram of the cutting unit of the present invention.

[0034] Figure 4 It is a schematic diagram of the first disc cutter and the second disc cutter meshing with each other of the present invention.

[0035] Figure 5 It is a schematic diagram of the tobacco leaf sheet being fed into the cutting unit of the present invention.

[0036] Figure 6 It is a schematic diagram of the tobacco leaf sheet being cut into multiple cigarette rods of the present invention.

[0037] Figure 7 It is a schematic cross-sectional view of the first air deflector block in an embodiment of the present invention.

[0038] Figure 8 It is a schematic diagram of the first air deflector block placed between the second disc cutter and the corresponding first annular cutter groove of the present invention.

[0039] Figure 9 It is a schematic cross-sectional view of the second air deflector block in an embodiment of the present invention.

[0040] Figure 10Schematic diagram of the second air deflector block of the present invention placed between the first disc cutter and the corresponding second annular cutter groove.

[0041] Figure 11 Schematic diagram of the movement trajectory of the tobacco sheet being cut into cigarette rods when the support assembly is not provided.

[0042] Figure 12 Schematic diagram of the cutting unit cutting the tobacco sheet when the first air deflector block is provided between the second disc cutter of the present invention and the corresponding first annular cutter groove.

[0043] Figure 13 Schematic diagram of the movement trajectory of the tobacco sheet being cut into cigarette rods when the first air deflector block is provided between the second disc cutter of the present invention and the corresponding first annular cutter groove.

[0044] Figure 14 Schematic diagram of the second disc cutter of the present invention cutting the tobacco sheet.

[0045] Figure 15 Schematic diagram of the cutting unit cutting the tobacco sheet when the second air deflector block is provided between the first disc cutter of the present invention and the corresponding second annular cutter groove.

[0046] Figure 16 Schematic diagram of the first disc cutter of the present invention cutting the tobacco sheet.

[0047] Figure 17 Schematic diagram of the structure of the curling unit of the present invention.

[0048] Figure 18 Schematic diagram of the structure of the feeding device of the present invention.

[0049] Figure 19 Schematic diagram of the gap formed between the outer circumferences of the first traction roller and the second traction roller of the present invention.

[0050] Figure 20 Schematic cross-sectional view of the converging funnel of the present invention.

[0051] Figure 21 Schematic diagram of the structure of the first air jet device of the present invention.

[0052] Figure 22 Schematic diagram of the structure of the second air jet device of the present invention.

[0053] Figure 23 Schematic diagram of the structure of the cleaning unit of the present invention. Detailed implementation manners

[0054] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0055] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0056] It should be noted that the "upper", "lower", "left", "right", "front", "rear", etc. used in the present invention are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0057] As Figure 1 shown in the structural schematic diagram of a manufacturing device for a heated cigarette rod according to the present invention. According to an embodiment of the present invention, there is provided a manufacturing device for a heated cigarette rod, which is used for the processing and feeding treatment of a non-combustible cigarette rod.

[0058] In traditional cigarettes, the short mixed tobacco, which is usually made by mixing cut tobacco leaves, cut tobacco stems, etc. in proportion, is called tobacco. These tobacco are irregularly filled into the forming paper to make cigarette products. To distinguish from the short tobacco in traditional cigarettes, the continuous tobacco made from rolled reconstituted tobacco leaves will be collectively referred to as tobacco rod in the following text.

[0059] The present invention unfolds low-strength rolled reconstituted tobacco leaves into tobacco leaf sheets P, cuts the tobacco leaf sheets P into tobacco rods P' (as Figure 6 shown), and conveys the cut tobacco rods P' to downstream processes. The downstream processes push the tobacco rods P' into the circular strips of the tobacco base rods to form tobacco base rods. For the cutting of the tobacco sheet P and the conveyance of the tobacco rods P' in the present invention, the process of pushing the downstream tobacco rods P' into the circular strips of the tobacco base rods can be processed according to the prior art, and will not be elaborated in the embodiments of the present invention below.

[0060] According to an embodiment of the present invention, a manufacturing apparatus for a heated cigarette rod includes an unwinding unit 1, a curling unit 4, a cutting unit 2, and a feeding device 3 arranged in sequence along the process direction, and a cleaning unit 5 arranged below the cutting unit 2.

[0061] In the embodiment of the present invention, the process direction refers to the direction in which the tobacco sheet P is conveyed, that is, the direction of the process flow. As Figure 1 shown in this embodiment, the process direction is from right to left, and in some embodiments, it can also be from left to right, which is specifically set according to the actual processing situation.

[0062] After the low-intensity rolled reconstituted tobacco leaves are unwound into tobacco sheets P by the unwinding unit 1, they enter the curling unit 4 that restricts the torsional movement of the tobacco sheets P in the lateral direction. After passing through the cutting unit 2, they are flatly cut into a plurality of cigarette rods P'. The cleaning unit 5 performs an efficient on-line automatic cleaning process on the cutting unit 2, and the feeding device 3 conveys the cut cigarette rods P' straight and orderly, and gathers the ends and then sends them to the downstream equipment.

[0063] As Figure 2 shown in the structural schematic diagram of the unwinding unit of the present invention, according to an embodiment of the present invention, the unwinding unit 1 is used to unwind the rolled reconstituted tobacco leaves into tobacco sheets P and make the unwound tobacco sheets P have a constant tension.

[0064] In the embodiment of the present invention, the unwinding unit 1 includes two reels 101, and the rolled reconstituted tobacco leaves are wound on the two reels 101 respectively. In the embodiment of the present invention, when the rolled reconstituted tobacco leaves on one reel 101 are completely unwound (or nearly completely unwound), the rolled reconstituted tobacco leaves on the other reel 101 are unwound and spliced with it, so that the unwound tobacco sheets P can continuously undergo the downstream process. Through the cyclic switching of the rolled reconstituted tobacco leaves on the two reels 101, the on-line splicing and continuous supply of the tobacco sheet P are realized.

[0065] In some embodiments, only one reel can also be provided, and the rolled reconstituted tobacco leaves on the reel 101 are specifically set according to the actual production scale.

[0066] According to an embodiment of the present invention, the unwinding unit 1 further includes a power machine 102, a rotating shaft 103, a connecting device 104, and a guide roller 105.

[0067] The rolled reconstituted tobacco leaves on the reel 101 are wound on the rotating shaft 103. The rotating shaft 103 is connected to the power machine 102. The power machine 102 runs synchronously tracking the production speed of the equipment and adaptively drives the rotating shaft 103 to rotate, thereby unwinding the rolled reconstituted tobacco leaves on the reel 101 and unwinding the rolled reconstituted tobacco leaves on the reel 101 into tobacco sheets P.

[0068] In an embodiment of the present invention, the connecting device 104 joins together the tobacco sheets P unrolled from the two drums 101, and after being guided by the guide roller 105, it is conveyed to the curling unit 4, so that the unrolled tobacco sheets P have a constant tension.

[0069] According to the curling unit 4 of the present invention, it is used to generate corrugated bends in the transverse direction of the unrolled tobacco sheet P. In an embodiment of the present invention, the longitudinal direction refers to the direction in which the tobacco sheet P is parallel to the process direction, and the transverse direction refers to the direction in which the tobacco sheet P is perpendicular to the process direction, as Figure 2 shown.

[0070] As Figure 1 shown, the curling unit 4 is a roller-shaped structure, which is arranged in the transverse direction. A plurality of annular protrusions 401 are provided on the outer circumference of the curling unit 4, as Figure 17 shown. 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 generate corrugated bends in the transverse direction, thereby restricting the torsional movement of the tobacco sheet P in the transverse direction.

[0071] The plurality of annular protrusions 401 provided 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 slightly curled in the transverse direction to generate corrugated bends. The corrugated bends generated by the tobacco sheet P cooperate with the corrugated surface of the curling unit 4 to fix the tobacco sheet P in the transverse direction. By selecting certain parameters for the tobacco sheet P to generate corrugated bends in the transverse direction, the curling unit 4 can locally generate an expected transverse resistance when the tobacco sheet P moves transversely. In the form of a reaction force, when the cutting unit 2 cuts the tobacco sheet P, each cutting point offsets the transverse tension deviation of the tobacco sheet P caused by inconsistent cutting resistances, 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.

[0072] As Figure 3 shown is the structural schematic diagram of the cutting unit of the present invention, Figure 4 shown is the schematic diagram of the meshing of the first disc cutter and the second disc cutter of the present invention. According to an embodiment of the present invention, the cutting unit 2 is used to longitudinally cut the tobacco sheet P into a plurality of tobacco strips P'.

[0073] The cutting unit 2 includes a tool holder 201, a driving motor 210, and a first cutter roller 202 and a second cutter roller 203 arranged in the transverse direction. The first cutter roller 202 and the second cutter roller 203 are installed on the tool holder 201, and the driving motor 210 drives the first cutter roller 202 and the second cutter roller 203 to rotate in opposite directions synchronously following the running speed of the equipment. In one embodiment, the driving motor 210 drives the first cutter roller 202 and the second cutter roller 203 to rotate in opposite directions by means of gear transmission.

[0074] A plurality of first disk cutters 204 arranged alternately are arrayed on the first cutter roller 202, and a plurality of second disk cutters 206 arranged alternately are arrayed on the second cutter roller 203. The plurality of first disk cutters 204 and the plurality of second disk cutters 206 mesh with each other, longitudinally cutting the tobacco leaf material P conveyed to the cutting unit 2 into a plurality of tobacco strips P', and at the same time driving the plurality of cut tobacco strips P' to be conveyed along the process direction.

[0075] Specifically, first cutting surfaces 208 are formed on both sides of the first disk cutter 204, and second cutting surfaces 209 are formed on both sides of the second disk cutter 206. A plurality of first annular cutter grooves 205 are formed between the plurality of alternately arranged first disk cutters 204, and a plurality of second annular cutter grooves 207 are formed between the plurality of alternately arranged second disk cutters 206.

[0076] The plurality of first disk cutters 204 are embedded into the plurality of second annular cutter grooves 207, and the plurality of second disk cutters 206 are embedded into the plurality of first annular cutter grooves 205, realizing the meshing of the plurality of first disk cutters 204 and the plurality of second disk cutters 206 with each other.

[0077] The tobacco leaf material P enters the cutting area (meshing area) of the first disk cutter 204 and the second disk cutter 206, and is clamped and fixed at the starting point of the cutting area between the first disk cutter 204 and the second disk cutter 206. The outer circumferential surface of the first disk cutter 204 gradually squeezes the tobacco leaf material P into the second annular cutter groove 207, and at the same time the outer circumferential surface of the second disk cutter 206 gradually squeezes the tobacco leaf material P into the first annular cutter groove 205, so that the tobacco leaf material P is torn between the first cutting surface 208 and the adjacent second cutting surface 209 to realize cutting. Figure 5 The schematic diagram of the tobacco leaf material of the present invention fed into the cutting unit is shown. Figure 6 The schematic diagram of the tobacco leaf material of the present invention cut into a plurality of tobacco strips is shown.

[0078] 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 the tobacco leaf material P is torn by the first cutting surface 208 of the first disk cutter 204 and the second cutting surface 209 of the second disk cutter 206 to realize cutting. When the distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s = 0 to 0.08 mm, when cutting the tobacco leaf material P made of low-strength flexible materials at this gap, the cutting force is the smallest, and the cutting quality of the obtained tobacco strip P' is better.

[0079] 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 to: in the cutting area of the first disc cutter 204 and the second disc cutter 206, make the plurality of cut tobacco strips P' alternately wrap the outer circumferential surface of the first disc cutter 204 and the outer circumferential surface of the second disc cutter 206.

[0080] Specifically, the support assembly 211 includes a plurality of first air guide blocks 2111 and a plurality of second air guide blocks 2112. Among them, the second air guide block 2112 is arranged between the first disc cutter 204 and the corresponding second annular cutter groove 207, and the first air guide block 2111 is arranged 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 tool holder 201 through a connecting member (not shown in the figure).

[0081] As Figure 7 shown in the cross-sectional schematic diagram of the first air guide block in an embodiment of the present invention, Figure 8 shown in the schematic diagram of the first air guide block placed between the second disc cutter and the corresponding first annular cutter groove of the present invention. The first air guide block 2111 includes a first air inlet hole 2113 and a first air outlet hole 2113', and the first air guide block 2111 is provided with a first air blowing groove 2114.

[0082] The first air blowing groove 2114 faces the second disc cutter 206 in the cutting area of the first disc cutter 204 and the second disc cutter 206.

[0083] As Figure 9 shown in the cross-sectional schematic diagram of the second air guide block in an embodiment of the present invention, Figure 10 shown in the schematic diagram of the second air guide block placed between the first disc cutter and the corresponding second annular cutter groove of the present invention. The second air guide block 2112 includes a second air inlet hole 2115 and a second air outlet hole 2115', and the second air guide block 2112 is provided with a second air blowing groove 2116.

[0084] The second air blowing groove 2116 faces the first disc cutter 204 in the cutting area of the first disc cutter 204 and the second disc cutter 206.

[0085] As Figure 11 shown in the schematic diagram of the movement trajectory of the tobacco sheet cut into tobacco strips when the support assembly is not provided. When the support assembly 211 is not provided, the tobacco leaf sheet P is fed from the feeding point O 1 fed, and the cut tobacco strip P' is led out from the leading-out point O 2Export. 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 export point O. 2 The linear velocity of the cut tobacco rod P' changes.

[0086] 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 export point, and the linear velocity of the cut tobacco rod P' changes.

[0087] To solve the problem of the change in the linear velocity of the cut tobacco rod P', the present invention provides a support assembly 211 between the first cutter roller 202 and the second cutter roller 203.

[0088] As Figure 12 shown in the schematic diagram of the cutting unit cutting the tobacco sheet when the first air deflector is provided between the second disc cutter of the present invention and the corresponding first annular cutter groove, as Figure 13 shown in the schematic diagram of the movement trajectory of the tobacco sheet being cut into tobacco rods when the first air deflector is provided between the second disc cutter of the present invention and the corresponding first annular cutter groove, Figure 14 shown in the schematic diagram of the second disc cutter of the present invention cutting the tobacco sheet. The tobacco sheet P is fed from the feeding point O 1 When the second disc cutter 206 is pressed into the first annular cutter groove 205 to cut the tobacco sheet P, compressed air is input through the first air inlet hole 2113 of the first air deflector 2111. In the cutting area between the first disc cutter 204 and the second disc cutter 206, the compressed air blows downward on the tobacco rod P' through the first air blowing groove 2114 to squeeze the tobacco rod P'.

[0089] 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 through the first air outlet hole 2113' of the first air deflector 2111, and in the export area, the compressed air blows downward on the tobacco rod P' to squeeze the tobacco rod P'.

[0090] By blowing and squeezing the tobacco rod P' downward through the first air blowing groove 2114 on the tobacco rod P' in the cutting area between the first disc cutter 204 and the second disc cutter 206, and blowing and squeezing the tobacco rod P' downward by the compressed air in the export area, so that in the cutting area between the first disc cutter 204 and the second disc cutter 206, the cut multiple tobacco rods P' are wrapped around the outer circumferential surface of the second disc cutter 206.

[0091] From the feeding point O 1 to the export point O 2 , the tobacco rod P' wraps around the outer circumferential surface of the second disc cutter 206, and the tobacco rod P' is at the feeding point O1 to the export point O 2 The cutting area between the points closely adheres to the outer circumferential surface of the second disk cutter 206 and rotates synchronously. After cutting, the cigarette rod P’ is at the export point O 2 The distance from the rotation center O of the second disk cutter 206 remains unchanged. According to the formula V = 2πRn, with the rotational speed n and radius R unchanged, its linear velocity will not change either. The first air deflector 2111 is extremely beneficial for the stable conveyance of the cigarette rod P’.

[0092] Similarly, as Figure 15 shown in the schematic diagram of the cutting unit cutting the tobacco sheet when a second air deflector is provided between the first disk cutter of the present invention and the corresponding second annular cutter groove Figure 16 shown in the schematic diagram of the first disk cutter of the present invention cutting the tobacco sheet. When the first disk cutter 204 is pressed into the second annular cutter groove 207 to cut the tobacco leaf sheet P, compressed air is input through the second air inlet hole 2115 of the second air deflector 2112. In the cutting area between the first disk cutter 204 and the second disk cutter 206, the compressed air blows upward on the cigarette rod P’ through the second air blowing groove 2116 to squeeze the cigarette rod P’.

[0093] After the first disk cutter 204 is pressed into the second annular cutter groove 207 to cut the tobacco leaf sheet P, the compressed air is blown out through the second air outlet hole 2115’ of the second air deflector 2112. In the export area, the compressed air blows upward on the cigarette rod P’ to squeeze the cigarette rod P’.

[0094] By blowing and squeezing the cigarette rod P’ upward through the second air blowing groove 2116 and blowing and squeezing the cigarette rod P’ upward with compressed air in the export area, the cut cigarette rods P’ are wrapped around the outer circumferential surface of the first disk cutter 204 in the cutting area between the first disk cutter 204 and the second disk cutter 206.

[0095] From the feeding point O 1 to the export point O 2 , the cigarette rod P’ wraps around the outer circumferential surface of the first disk cutter 204. The cigarette rod P’ is at the feeding point O 1 to the export point O 2 The cutting area between the points closely adheres to the outer circumferential surface of the first disk cutter 204 and rotates synchronously. After cutting, the cigarette rod P’ is at the export point O 2 The distance from the rotation center of the first disk cutter 204 remains unchanged. According to the formula V = 2πRn, with the rotational speed n and radius R unchanged, its linear velocity will not change either. The second air deflector 2112 is extremely beneficial for the stable conveyance of the cigarette rod P’.

[0096] A support assembly 211 is arranged between the first cutter roller 202 and the second cutter roller 203 of the present invention. In the cutting area of the first disc cutter 204 and the second disc cutter 206, after being cut, a plurality of cigarette 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, which can ensure that the plurality of cigarette rods P' after cutting are more flat and in the same plane, as Figure 6 shown. A support assembly 211 is arranged between the first cutter roller 202 and the second cutter roller 203. The cigarette rod P' not only obtains good flexible support, but also has the same linear velocity during the cutting process, effectively improving the cutting size accuracy, greatly reducing the wire breakage rate of the cigarette rod P' after cutting, improving the cutting size accuracy, and improving the continuous production efficiency of the equipment.

[0097] In some embodiments, on one side where the tobacco leaf material P is introduced into the cutting unit 2, the heads of the first air deflector block 2111 and the second air deflector block 2112 deviate in the direction away from each other to ensure that the tobacco leaf material P smoothly enters the cutting unit 2 for cutting.

[0098] Figure 17 The structural schematic diagram of the curling unit of the present invention is shown. 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 one embodiment, the distance A between the axis center of the curling unit 4 and the axis centers of the first cutter roller 202 and the second cutter roller 203 is 0.5 to 1.5 times the transverse width of the tobacco leaf material P. At the same time, by adjusting the guide roller 105, the wrapping angle β of the tobacco leaf material P on the curling unit 4 is 60° to 180°.

[0099] In a further embodiment, the distance A between the axis center of the curling unit 4 and the axis centers of the first cutter roller 202 and the second cutter roller 203 is 50 mm to 150 mm.

[0100] As Figure 18 shown, the structural schematic diagram of the feeding device of the present invention Figure 19 shown, the schematic diagram of the gap formed between the outer circumferences of the first traction roller and the second traction roller of the present invention. The feeding unit 3 is arranged on the downstream side of the cutting unit 2, and the cut cigarette rod P' is straightly conveyed to the feeding device 3. The present invention provides a feeding device for low-strength flexible continuous cigarette rods. The feeding device 3 is used to traction a plurality of cigarette rods P' to be straightly conveyed along the process direction. The feeding device 3 extends from the cigarette rod P' outlet point of the cutting unit 2 to the inlet end of the downstream equipment.

[0101] The feeding device 3 includes at least one set of traction roller pairs, a first flat groove plate 305, a second flat groove plate 306, a converging funnel 301, a motor 304 and a negative pressure suction nozzle 307.

[0102] The drawing roller pair includes a first drawing roller 302 and a second drawing roller 303. At least one strip groove 3021 is formed along the axial direction of the surface of the first drawing roller 302. The gap C between the outer circumferences of the first drawing roller 302 and the second drawing roller 303 is smaller than the thickness of the cigarette rod P'. And when the strip groove 3021 of the first drawing roller 302 rotates to face the second drawing roller 303, the gap C1 between the edge of the strip groove 3021 and the outer circumference of the second drawing roller 303 is larger than the thickness of the cigarette rod P'.

[0103] The installation axis of the first drawing roller 302 is parallel to the axis of the first cutter roller 202, and the installation axis of the second drawing roller 303 is parallel to the axis of the second cutter roller 203. The gap C between the first drawing roller 302 and the second drawing roller 303 is slightly smaller than the thickness of the cigarette rod P'. When the cigarette rod P' enters the gap between the first drawing roller 302 and the second drawing roller 303, a certain pressure is formed on the cigarette rod P'. The motor 304 drives the first drawing roller 302 and the second drawing roller 303 to rotate towards each other and is consistent with the production speed of the equipment, and the cigarette rod P' is drawn forward through the action of the clamping force.

[0104] When the strip groove 3021 of the first drawing roller 302 rotates to the drawing position of the cigarette rod P' (the strip groove 3021 faces the second drawing roller 303), the gap C between the outer circumferences of the first drawing roller 302 and the second drawing roller 303 increases and becomes the gap C1 between the edge of the strip groove 3021 and the outer circumference of the second drawing roller 303 (larger than the thickness of the cigarette rod P'). At this time, there is no pressure on the cigarette rod P' between the first drawing roller 302 and the second drawing roller 303, and the cigarette rod P' can slide back and forth adaptively between the first drawing roller 302 and the second drawing roller 303.

[0105] According to an embodiment of the present invention, the first flat groove plate 305 and the second flat groove plate 306 are arranged flat on both sides of the drawing roller pair, and a plurality of dust suction holes are respectively formed on the bottom surfaces of the first flat groove plate 305 and the second flat groove plate 306. 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 cutter roller 202 and the second cutter roller 203. As Figure 20 shown in the cross-sectional schematic diagram of the converging funnel of the present invention, the inside of the converging funnel 301 has a Venturi tube structure, and the converging funnel 301 is provided with a nozzle 308, and compressed air is introduced into the Venturi tube structure inside the converging funnel 301 through the nozzle 308.

[0106] The inlet end of the converging funnel 301 is square, which is convenient for the cigarette rod P' to enter. The outlet end of the converging funnel 301 gradually narrows to a circular shape for gathering the cigarette rod P'. After a plurality of cigarette rods P' are gathered, they are conveyed from the outlet end of the converging funnel 301 to the downstream equipment.

[0107] Specifically, air is continuously supplied to the Venturi tube structure inside the converging funnel 301 through the nozzle 308, creating a negative pressure 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 traction roller 302 and the second traction roller 303, and converges the cigarette rod P'. After multiple cigarette rods P' are converged, they are conveyed from the outlet end of the converging funnel 301 to the downstream equipment.

[0108] It is beneficial to pre-converge the flat cigarette rod P' before the formation of the tobacco base rod. For example, pre-convergence can obtain a smaller forming resistance when the cigarette rod P' is pushed into the circular strip of the tobacco base rod. Further, the cigarette rods P' on both sides can move slowly laterally towards the central axis of the circular strip of the tobacco base rod, so as to better facilitate the straight arrangement of the cigarette rod P' in the circular strip of the tobacco base rod.

[0109] In some embodiments, the diameter of the minimum cross-section position of the Venturi tube structure inside the converging funnel 301 is 1.5 to 3 times the diameter of the circular strip of the tobacco base rod.

[0110] It is essentially difficult to derive the soft and weakly-strength cigarette rod P' from the multiple first annular knife grooves 205 and multiple second annular knife grooves 207 of the cutting unit 2. By using the first traction roller 302 and the second traction roller 303, the pre-tightening force applied to the cigarette rod P' can be stably maintained during the operation of the equipment. This pre-tightening force can ensure the straight and orderly conveyance of the cigarette rod P', facilitate the parallel distribution in the axial direction after subsequent lateral convergence, keep the flat posture of the cigarette rod P' unchanged, and effectively enable the cigarette rod P' to be smoothly derived from the cutting unit 2.

[0111] However, objectively, due to manufacturing and control precision, it is impossible to completely achieve the same linear velocity between the first traction roller 302 and the second traction roller 303, and the multiple first annular knife grooves 205 and multiple second annular knife grooves 207. Therefore, cumulative errors will occur when the cigarette rod P' is conveyed without slipping between the first traction roller 302 and the second traction roller 303, and the multiple first annular knife grooves 205 and multiple second annular knife grooves 207. When the error exceeds a certain value, it will cause the cigarette rod P' to break, lead to roll entanglement and disordered arrangement, etc., seriously restricting the equipment efficiency and the quality of the finished product production.

[0112] At least one strip groove 3021 is axially formed on the surface of the first traction roller 302 of the present invention along the axis 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 until the strip groove 3021 faces the second traction roller 303, the gap C1 between the edge of the strip groove 3021 and the outer circumference of the second traction roller 303 is larger than the thickness of the cigarette rod P'.

[0113] A converging funnel 301 is provided on the downstream side of the second planar groove plate 306. The Venturi tube structure inside the converging funnel 301 continuously supplies compressed air through a nozzle 308, creating a negative pressure at the outlet end of the converging funnel 301. Under the action of the pressure difference, the cigarette rod P' is continuously and flexibly pulled during operation. Further, when the strip groove 3021 of the first traction roller 302 rotates to the traction position of the cigarette rod P' (the strip groove 3021 is facing the second traction roller 303), the cigarette rod P' can slide back and forth adaptively between the first traction roller 302 and the second traction roller 303, thereby eliminating the cumulative error of transmission.

[0114] Through the adjustment of the flexible traction force of the cigarette rod P' in the converging funnel 301 in the present invention, when the cigarette rod P' passes through the gap C1 between the strip groove 3021 of the first traction roller 302 and the outer circumference of the second traction roller 303, it can slide back and forth adaptively under the negative pressure traction, eliminating the cumulative error of transmission and avoiding the breakage, winding of the roller, and disordered arrangement of the cigarette rod P'.

[0115] In some embodiments, a buffer is provided between the outlet end of the converging funnel 301 and the downstream equipment to stably convey the cigarette rod P' to the downstream equipment. For example, a certain buffer volume is formed by speed control, and this buffer volume can be used to compensate for the transmission error of the cigarette rod P'.

[0116] According to the embodiments of the present invention, when multiple cigarette rods P' are conveyed to the feeding device 3, the multiple cigarette rods P' are conveyed above the first planar groove plate 305 and the second planar groove plate 306. In some embodiments, the distance between the multiple cigarette rods P' and the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 is 0 to 1 mm.

[0117] In a further embodiment, the distance between the multiple cigarette rods P' and the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 is adjustable.

[0118] In a further embodiment, when the cigarette rod P' is tensioned, it can slightly contact the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306.

[0119] Due to the characteristics of the cigarette rod P' such as low strength, high flexibility, and easy breakage, it is necessary to provide certain support to the cigarette rod P' to assist its transmission. The present invention provides certain support to the cigarette rod P' through the first planar groove plate 305 and the second planar groove plate 306 to assist its transmission.

[0120] Since the cigarette rod P' needs to be slightly tensioned for transmission, however, the slightly tensioned cigarette rod P' essentially has jitter during high-speed transmission, which will inevitably cause the breakage of individual cigarette rods P'. The cigarette rod P' can be effectively inhibited from jitter by the wire drawing treatment of the first planar groove plate 305 and the second planar groove plate 306.

[0121] In addition, objectively, due to manufacturing and control precision, it is impossible to completely achieve the same linear velocity between the first traction roller 302 and the second traction roller 303, and between the multiple first annular knife grooves 205 and the multiple second annular knife grooves 207. Therefore, the breakage of the tobacco rod P' between a pair of traction roller groups and the cutting unit cannot be completely avoided. In the present invention, the tobacco rod P' is supported by the first planar groove plate 305 and the second planar groove plate 306. The front section of the broken tobacco rod P' continues to be conveyed forward under the flexible traction of the converging funnel 301. The rear section of the broken tobacco rod P' is tractioned to continue to be conveyed forward by the frictional force generated by the surrounding normally conveyed tobacco rod P'. When the head of the rear section of the broken tobacco rod P' passes through the first traction roller 302 and the second traction roller 303, a clamping force is established again to achieve straight and orderly conveyance, which can keep the broken tobacco rod P' on the predetermined path of the conveyance of the tobacco rod P', avoiding irreversible loss of materials.

[0122] According to an embodiment of the present invention, a plurality of dust suction holes are respectively opened on the bottom surfaces of the first planar groove plate 305 and the second planar groove plate 306. The plurality of dust suction holes are connected to a negative pressure fan 507 (described below) through a negative pressure nozzle 307 to timely suck away the waste (dust, tobacco powder, etc.) on the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306.

[0123] In one embodiment, the diameter of the plurality of dust suction holes opened on the bottom surfaces of the first planar groove plate 305 and the second planar groove plate 306 is less than 2 mm.

[0124] According to an embodiment of the present invention, a feeding method for a low-strength flexible continuous tobacco rod is provided. By using the feeding device for a low-strength flexible continuous tobacco rod provided by the present invention, the tobacco rod is fed, including:

[0125] The first traction roller 302 and the second traction roller 303 rotate, and the tobacco rod P' enters the gap C between the first traction roller 302 and the second traction roller 303. The first traction roller 302 and the second traction roller 303 form a certain pressure on the tobacco rod P' and traction the tobacco rod P' to move forward through the action of the clamping force;

[0126] The converging funnel 301 introduces compressed air into the interior of the converging funnel 301 in a Venturi tube structure through the nozzle 308 to perform flexible traction on the tobacco rod P'.

[0127] Wherein, when the first traction roller 302 rotates until the strip groove 3021 faces the second traction roller 303, the tobacco rod P' passes through the gap C1 between the strip groove 3021 of the first traction roller 302 and the outer circumference of the second traction roller 303, and slides forward and backward adaptively under the flexible traction of the converging funnel 301.

[0128] The converging funnel 301 introduces compressed air into the interior of the converging funnel 301 in a Venturi tube structure through the nozzle 308, sucks in multiple tobacco rods P', and converges the multiple tobacco rods P'.

[0129] The multiple tobacco rods P' are conveyed above the first planar grooved plate 305 and the second planar grooved plate 306 and are conveyed to the converging funnel 301 for convergence.

[0130] During the cutting of the tobacco leaf material P and the conveying of the tobacco rod P' in the present invention, a cleaning process is performed, such as Figure 21 As shown in the structural schematic diagram of the first air jet device of the present invention, Figure 22 As shown in the structural schematic diagram of the second air jet device of the present invention, Figure 23 As shown in the structural schematic diagram of the cleaning unit of the present invention, a manufacturing device for a heated cigarette tobacco rod provided by the present invention further includes a cleaning unit 5, and the cleaning unit 5 is arranged below the cutting unit 2.

[0131] The cleaning unit 5 includes: 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 tank 509, a collection box 508, a negative pressure conveying pipeline 505, a filter 506, and a negative pressure fan 507.

[0132] The first air jet device 501A is installed on the tool rest 201, and a first comb-shaped scraper 502A is installed on the first air jet device 501A. The first comb-shaped scraper 502A is located on one side of the first cutter roller 202 and is embedded in a plurality of first annular cutter grooves 205 formed between a plurality of alternately arranged first disc cutters 204. The first comb-shaped scraper 502A scrapes off the viscous waste (dust, tobacco powder, etc.) in the first annular cutter grooves 205, and the first air jet device 501A cleans the first annular cutter grooves 205 through high-speed air flow in combination with the first comb-shaped scraper 502A.

[0133] The first air jet device 501A is provided with a first air inlet 501A1, and a first air blowing port (not shown in the figure) is provided between the gaps of the first comb-shaped scraper 502A. The first air inlet 501A1 of the first air jet device 501A introduces high-speed air flow to clean the first annular cutter grooves 205 and remove the waste (dust, tobacco powder, etc.) in the first annular cutter grooves 205.

[0134] Similarly, the second air jet device 501B is installed on the tool rest 201. A second comb-shaped scraper 502B is installed on the second air jet device 501B. The second comb-shaped scraper 502B is located on one side of the second cutter roller 203 and is embedded in a plurality of first annular cutter grooves 207 formed between a plurality of alternately arranged second disc cutters 206. The second comb-shaped scraper 502B scrapes off the viscous waste (dust, tobacco dust, etc.) in the first annular cutter groove 205. The second air jet device 501B uses high-speed air flow to clean the second annular cutter groove 207 in combination with the second comb-shaped scraper 502B.

[0135] 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) is provided between the gaps of the second comb-shaped scraper 502B. The second air inlet 501B1 of the second air jet device 501B introduces high-speed air flow to clean the second annular cutter groove 207 and remove the waste (dust, tobacco dust, etc.) in the second annular cutter groove 207.

[0136] The plasma generator 503 is connected to a first plasma nozzle 504A and a second plasma nozzle 504B. The first plasma nozzle 504A and the second plasma nozzle 504B are respectively located on the other sides of the first cutter roller 202 and the second cutter roller 203. The first plasma nozzle 504A faces the first annular cutter groove 205, and the second plasma nozzle 504B faces the second annular cutter groove 207. The first plasma nozzle 504A and the second plasma nozzle 504B are respectively installed on the tool rest 201.

[0137] The plasma generator 503 respectively introduces plasma gas containing active atomic oxygen into the first annular cutter groove 205 and the second annular cutter groove 207 through the first plasma nozzle 504A and the second plasma nozzle 504B to deeply clean again 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.

[0138] The collection tank 509 is located below the second disc cutter 206. 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 connects the collection box 508 and the negative pressure fan 507, and a filter 506 is provided on the negative pressure conveying pipeline 505.

[0139] The waste (dust, tobacco powder, etc.) that falls after cleaning the first annular knife groove 205 drops onto the first flat groove plate 305, and the waste (dust, tobacco powder, etc.) that falls after cleaning the second annular knife groove 207 drops into the collection tank 509. The negative pressure fan 507 pumps air, creating a negative pressure inside the collection box 508. The waste (dust, tobacco powder, etc.) enters the collection box 508 from the collection tank 509 and the bottom of the first flat groove plate 305. At the same time, a filter 506 is provided on the negative pressure conveying pipe 505 to filter the waste (dust, tobacco powder, etc.) in the gas during the air extraction process, preventing the waste from being pumped out of the collection box 508.

[0140] In the present invention, the negative pressure fan 507 is connected to the negative pressure suction nozzle 307. By pumping air with the negative pressure fan 507, the waste (dust, tobacco powder, etc.) on the upper surfaces of the first flat groove plate 305 and the second flat groove plate 306 is promptly sucked away.

[0141] According to an embodiment of the present invention, there is provided a method for manufacturing a heated cigarette rod. Using a manufacturing device for a heated cigarette rod provided by the present invention, a heated cigarette rod is manufactured, including the following steps:

[0142] 1) Unroll the rolled reconstituted tobacco leaf into a tobacco leaf sheet P, and make the unrolled tobacco leaf sheet P have a constant tension.

[0143] The rolled reconstituted tobacco leaf on the reel 101 is wound around the rotating shaft 103. The rotating shaft 103 is connected to the power machine 102, and the power machine 102 runs synchronously tracking the production speed of the equipment, adaptively driving the rotation of the rotating shaft 103, thereby unrolling the rolled reconstituted tobacco leaf on the reel 101 into a tobacco leaf sheet P. After being guided by the guide roller 105, it is conveyed to the curling unit 4, making the unrolled tobacco leaf sheet P have a constant tension.

[0144] 2) The unrolled tobacco leaf sheet P is conveyed to the curling unit 4. The curling unit 4 makes the tobacco leaf sheet P generate a corrugated bend in the transverse direction through the corrugated surface formed by the annular protrusions.

[0145] 3) The tobacco leaf sheet P is conveyed to the cutting unit 2, and the cutting unit 2 longitudinally cuts the tobacco leaf sheet P into a plurality of cigarette rods P'.

[0146] In the cutting area of the first disc cutter 204 and the second disc cutter 206 of the cutting unit 2, the plurality of cut cigarette rods P' alternately wrap the outer circumferential surfaces of the first disc cutter 204 and the second disc cutter 206.

[0147] During the process of the cutting unit 2 longitudinally cutting the tobacco leaf sheet P into a plurality of cigarette rods P', the cleaning unit 5 cleans the cutting unit 2, including the following steps:

[0148] 31) Preliminary cleaning.

[0149] The first comb-shaped scraper 502A and the second comb-shaped scraper 502B of the cleaning unit 5, in combination with the high-speed airflows introduced by the first air jet device 501A and the second air jet device 501B, respectively clean the first annular knife groove 205 and the second annular knife groove 207.

[0150] When the first knife roller 202 and the second knife roller 203 rotate circumferentially, the waste (dust, tobacco fines, etc.) adhering to the first annular knife groove 205 and the second annular knife groove 207 respectively generates mechanical extrusion with the stationary first comb-shaped scraper 502A and the second comb-shaped scraper 502B, thereby realizing chip removal. Then, in combination with the high-speed airflows introduced by the first air jet device 501A and the second air jet device 501B, the scraped waste (dust, tobacco fines, etc.) is removed from the first annular knife groove 205 and the second annular knife groove 207.

[0151] 32) Re-cleaning.

[0152] The plasma generator 503 of the cleaning unit 5 generates plasma, and the plasma is respectively introduced into the first annular knife groove 205 and the second annular knife groove 207 by the first plasma nozzle 504A and the second plasma nozzle 504B to re-deep clean the first annular knife groove 205 and the second annular knife groove 207.

[0153] The active atomic oxygen in the plasma can quickly oxidize the main viscous substance components in the reconstituted tobacco, such as pectin, propylene glycol, glycerol, and spices, etc., into volatile gases or perform modification treatment, thereby greatly reducing the viscosity of the tobacco fines and dust in the first annular knife groove 205 and the second annular knife groove 207. Thus, it avoids the condensation of waste (dust, tobacco fines, etc.) in the parts 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, and enables the waste (dust, tobacco fines, etc.) to be automatically discharged under the action of gravity.

[0154] 33) Waste collection.

[0155] The negative pressure fan 507 of the cleaning unit 5 generates negative pressure to collect the waste that has fallen into the collection tank 509 and the bottom of the first flat groove plate 305 into the collection box 508.

[0156] 4) Multiple cigarette rods P' are conveyed to the feeding device 3. Compressed air is applied in the converging funnel 301 of the feeding device 3, and through the first traction roller 302 and the second traction roller 303 of the feeding device 3, multiple cigarette rods P' are tractioned to be conveyed straight along the process direction.

[0157] During the process of the plurality of cigarette rods P' being conveyed straight along the process direction by the feeding device 3, compressed air is applied in the converging funnel 301, and the plurality of cigarette rods P' are tractioned by the first traction roller 302 and the second traction roller 303 of the feeding device 3. At least one strip groove 3021 is formed along the axial direction of the first traction roller 302 on the surface 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 rod P'. And when the first traction roller 302 rotates to make the strip groove 3021 face the second traction roller 303, the gap C1 between the edge of the strip groove 3021 and the outer circumference of the second traction roller 303 is larger than the thickness of the cigarette rod P'. When the cigarette rod P' passes through the gap C1 between the strip groove 3021 of the first traction roller 302 and the outer circumference of the second traction roller 303, it can slide adaptively back and forth under the negative pressure traction to eliminate the cumulative error of the conveyance.

[0158] During the process of the plurality of cigarette rods P' being conveyed straight along the process direction by the feeding device 3, the negative pressure fan 507 sucks air, and the waste (dust, tobacco fines, etc.) on the upper surfaces of the first flat groove plate 305 and the second flat groove plate 306 is sucked away in time through the negative pressure suction nozzle 307.

[0159] The following points need to be explained:

[0160] (1) The attached drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the general designs.

[0161] (2) For clarity, in the attached drawings used to describe the embodiments of the present invention, the thickness of the layer or region is enlarged or reduced, that is, these 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, the element can be "directly" on or under the other element or there can be an intermediate element.

[0162] (3) Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0163] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A feeding device for low-strength flexible continuous cigarette rods, characterized in that, the feeding device includes at least one pair of traction rollers, a first flat groove plate and a second flat groove plate, and the pair of traction rollers includes a first traction roller and a second traction roller; wherein, at least one strip groove is formed along the axial direction of the first traction roller on the surface of the first traction roller, wherein, the gap between the outer circumference of the first traction roller and the outer circumference of the second traction roller is smaller than the thickness of the cigarette rod, and when the strip groove of the first traction roller rotates to face the second traction roller, the gap between the edge of the strip groove and the outer circumference of the second traction roller is larger than the thickness of the cigarette rod; the first flat groove plate and the second flat groove plate are arranged flat on both sides of the pair of traction rollers, and a plurality of dust suction holes are respectively formed on the bottom surfaces of the first flat groove plate and the second flat groove plate; when a plurality of cigarette rods are conveyed to the feeding device, the plurality of cigarette rods are conveyed above the first flat groove plate and the second flat groove plate; the feeding device further includes a converging funnel, the converging funnel is arranged on the downstream side of the second flat groove plate, and the inside of the converging funnel has a Venturi tube structure; the converging funnel is provided with a nozzle, and compressed air is introduced into the Venturi tube structure inside the converging funnel through the nozzle; a plurality of the cigarette rods are conveyed above the first flat groove plate and the second flat groove plate, and the distance between the plurality of cigarette rods and the upper surfaces of the first flat groove plate and the second flat groove plate is 0 to 1 mm.

2. The feeding device according to claim 1, characterized in that, the diameter of the position of the minimum cross-section of the Venturi tube structure inside the converging funnel is 1.5 to 3 times the diameter of the circular strip of the tobacco base rod.

3. The feeding device according to claim 1, characterized in that, a plurality of the cigarette rods are conveyed above the first flat groove plate and the second flat groove plate, and the distance between the plurality of cigarette rods and the upper surfaces of the first flat groove plate and the second flat groove plate is adjustable.

4. The feeding device according to claim 1, characterized in that, a plurality of the cigarette rods are conveyed above the first flat groove plate and the second flat groove plate, and the plurality of cigarette rods are slightly in contact with the upper surfaces of the first flat groove plate and the second flat groove plate.

5. The feeding device according to claim 1, characterized in that, the feeding device further includes a negative pressure suction nozzle, and a plurality of dust suction holes are connected to a negative pressure fan through the negative pressure suction nozzle.

6. A feeding method for low-strength flexible continuous cigarette rods, characterized in that, the feeding method uses the feeding device according to any one of claims 1 to 5 to feed the cigarette rods, including: the first traction roller and the second traction roller rotate, the cigarette rod enters the gap between the first traction roller and the second traction roller, the first traction roller and the second traction roller form a certain pressure on the cigarette rod, and the cigarette rod is pulled forward by the action of the clamping force; the converging funnel introduces compressed air into the Venturi tube structure inside the converging funnel through the nozzle to perform flexible traction on the cigarette rod, Wherein, when the first traction roller rotates until the strip groove is facing the second traction roller, the cigarette rod passes through the gap between the strip groove of the first traction roller and the outer circumference of the second traction roller, and slides back and forth adaptively under the flexible traction of the converging funnel; The converging funnel introduces compressed air into the inside of the converging funnel in the structure of a Venturi tube through a nozzle, sucks in a plurality of cigarette rods, and converges the plurality of cigarette rods.

7. The feeding method of the low-intensity flexible continuous cigarette rod according to claim 6, characterized in that, A plurality of cigarette rods are conveyed above the first flat groove plate and the second flat groove plate and are conveyed to the converging funnel for convergence.

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