A manufacturing device and method for heating type cigarette rod

Abstract

The present invention provides a manufacturing device for heated cigarette tobacco rods, comprising an unwinding unit, a curling unit, a cutting unit and a feeding unit arranged in sequence along the process direction; the cutting unit comprises a first knife roller and a second knife stick arranged in the transverse direction, a plurality of first disc cutters arranged alternately are arrayed on the first knife roller, and a plurality of second disc cutters arranged alternately are arrayed on the second knife stick, and the plurality of first disc cutters and the plurality of second disc cutters are meshed with each other; a support assembly is arranged between the first knife roller and the second knife roller, and the support assembly is configured to: in the cutting area of ​​the first disc cutter and the second disc cutter, the plurality of tobacco rods after being cut are alternately wrapped with the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter. The present invention prevents tobacco rods from breaking in the annular knife groove, and the tobacco rods can slide back and forth adaptively at a specific position of each circle of a group of traction roller pairs, eliminating the cumulative transmission error, and effectively reducing the situation of tobacco rods breaking during transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette blank manufacturing equipment, and in particular to a manufacturing device and a manufacturing method for heated cigarette rods. Background Art

[0002] In an 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 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. The center heating type has more advantages in smoke taste, number of puffs and consistency of single smoke volume, and occupies an absolute dominant position in the market. Center heating cigarettes are composed of multiple short rods with different functions, usually including a tobacco base rod containing tobacco ingredients, a support rod, a cooling rod, a filter rod, etc.

[0003] The tobacco base rod is the core functional unit of heated cigarettes. It is usually made by unfolding rolled reconstituted tobacco leaves into tobacco leaves, which are embossed, curled or cut into shreds and then wrapped with cigarette paper.

[0004] During the manufacturing process, on the one hand, it is necessary to push the flat continuous tobacco rod into the round rod, and ensure that the distribution and filling amount of the tobacco rod in the round rod are consistent, and that the tobacco rod is horizontally arranged in the axial direction and has the same length, so as to facilitate product use, heat transfer and aerosol release. However, the tobacco base rod manufactured using existing known technologies has a great deal of randomness in its tobacco rod arrangement and filling amount.

[0005] On the other hand, the reconstituted tobacco used in cigarette rods is a recycled product made from waste tobacco materials such as tobacco dust, tobacco stems, and broken tobacco pieces in the cigarette-making process as raw materials and with the addition of certain plasticizers, adhesives, and preservatives. The material distribution of tobacco leaves is inherently uneven in small local areas, and the tensile strength also varies. When using existing shredding technology for processing, it is easy to break at places with weak strength or large particle nodules.

[0006] On the other hand, the content of propylene glycol, glycerol and flavors in the reconstituted tobacco used for heated cigarettes is much higher than that in traditional reconstituted tobacco. At the same time, the fibers in the material are smaller, which makes the physical properties of the two materials very different. The former has higher viscosity and low tensile strength, and a large amount of sticky powder will be produced during processing. The existing embossing or cutting processing methods are extremely unsuitable for such materials. Summary of the invention

[0007] The present invention provides a manufacturing device and a manufacturing method for heated cigarette rods, so as to solve the technical problems in the prior art that in the process of manufacturing tobacco base rods from rolled reconstituted tobacco leaves, the tobacco rods are easily broken after the tobacco leaves are cut, and a large amount of sticky powder is easily generated.

[0008] The technical solution provided by the present invention is as follows:

[0009] An object of the present invention is to provide a manufacturing device for heated cigarette rods, the manufacturing device comprising an unwinding unit, a curling unit, a cutting unit and a feeding unit arranged in sequence along a process direction.

[0010] The unwinding unit is used to unfold the rolled reconstituted tobacco leaves into tobacco leaves, and make the unfolded tobacco leaves have a constant tension; the curling unit is used to produce corrugated bends in the transverse direction on the unfolded tobacco leaves;

[0011] The cutting unit is used to cut the tobacco leaves into multiple tobacco rods along the longitudinal direction; the feeding unit is used to pull the multiple tobacco rods and convey them straightly along the process direction;

[0012] The cutting unit comprises a first knife roller and a second knife stick arranged in a transverse direction, the first knife roller is provided with a plurality of first disc cutters arranged alternately, the second knife stick is provided with a plurality of second disc cutters arranged alternately, and the plurality of the first disc cutters are meshed with the plurality of the second disc cutters;

[0013] A support assembly is provided between the first blade roller and the second blade roller, and the support assembly is configured such that, in the cutting areas of the first disc cutter and the second disc cutter, the multiple tobacco rods after being cut are alternately wrapped around the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter.

[0014] In a preferred embodiment, the support assembly includes a plurality of first air guide blocks and a plurality of second air guide blocks;

[0015] A plurality of first annular cutter grooves are formed between the plurality of first disc cutters that are arranged alternately; a plurality of second annular cutter grooves are formed between the plurality of second disc cutters that are arranged alternately;

[0016] A plurality of the first disc cutters are embedded in a plurality of the second annular cutter grooves, and a plurality of the second disc cutters are embedded in a plurality of the first annular cutter grooves;

[0017] Wherein, the second air guide block is arranged between the first disc cutter and the corresponding second annular cutter groove, and the first air guide block is arranged between the second disc cutter and the corresponding first annular cutter groove.

[0018] In a preferred embodiment, the first air guide block includes a first air inlet and a first air outlet, and the first air guide block is provided with a first air blowing groove;

[0019] The first air blowing slot is located in the cutting area of ​​the first disc cutter and the second disc cutter and faces the second disc cutter;

[0020] The second air guide block comprises a second air inlet and a second air outlet, and the second air guide block is provided with a second air blowing groove;

[0021] The second air blowing slot is located in the cutting area of ​​the first disc cutter and the second disc cutter and faces the first disc cutter.

[0022] In a preferred embodiment, on the side where the tobacco leaves are introduced into the cutting unit, the head of the first air guide block and the head of the second air guide block are offset in directions away from each other.

[0023] In a preferred embodiment, the curling unit is arranged in the transverse direction, and a plurality of annular protrusions are provided on the outer circumference of the curling unit, and the plurality of annular protrusions form a corrugated surface;

[0024] When the tobacco leaves are wrapped in the curling unit, the corrugated surface formed by the plurality of annular protrusions causes the tobacco leaves to generate corrugated bends in the transverse direction.

[0025] In a preferred embodiment, the feeding unit comprises at least one set of traction roller pairs, wherein the traction roller pairs comprise a first traction roller and a second traction roller;

[0026] Wherein, at least one strip groove is provided on the surface of the first traction roller along the axial direction of the first traction roller.

[0027] Among them, 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 tobacco rod, and when the first traction roller rotates until the strip groove faces 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 tobacco rod.

[0028] In a preferred embodiment, the feeding unit further comprises a first plane groove plate, the second plane groove plate and a converging funnel;

[0029] The first plane groove plate and the second plane groove plate are arranged flatly on both sides of the traction roller pair, and the bottom surfaces of the first plane groove plate and the second plane groove plate are respectively provided with a plurality of dust suction holes;

[0030] When a plurality of tobacco rods are conveyed to the feeding unit, the plurality of tobacco rods are conveyed above the first planar groove plate and the second planar groove plate;

[0031] The converging funnel is arranged on the downstream side of the second plane groove plate, and the interior of the converging funnel is a Venturi tube structure.

[0032] In a preferred embodiment, the manufacturing device further comprises a cleaning unit; the cleaning unit is arranged below the cutting unit and comprises: a first air jet device and a second air jet device;

[0033] A first comb-type scraper is installed on the first air jet device, the first comb-type scraper is located on one side of the first knife roller and is embedded in a plurality of first annular knife grooves formed between a plurality of first disc cutters arranged alternately;

[0034] A second comb-type scraper is installed on the second air jet device, the second comb-type scraper is located on one side of the second knife roller and is embedded in a plurality of second annular knife grooves formed between a plurality of second disc cutters arranged alternately;

[0035] The first air jet device cleans the first annular knife groove through high-speed airflow in combination with a first comb-type scraper; the second air jet device cleans the second annular knife groove through high-speed airflow in combination with a second comb-type scraper.

[0036] In a preferred embodiment, the cleaning unit further comprises: a first plasma nozzle, a second plasma nozzle and a plasma generator.

[0037] The plasma generator is connected to the first plasma nozzle and the second plasma nozzle, the first plasma nozzle is directly opposite to the first annular knife groove, and the second plasma nozzle is directly opposite to the second annular knife groove.

[0038] In a preferred embodiment, the cleaning unit further comprises a collection tank, a collection box, a negative pressure delivery pipeline, a filter and a negative pressure fan;

[0039] The collecting tank is located below the second disc cutter, and the collecting box is located below the collecting tank and is connected to the collecting tank through a pipeline;

[0040] The negative pressure delivery pipeline is connected to the collection box and the negative pressure fan, and the filter is arranged on the negative pressure delivery pipeline.

[0041] Another object of the present invention is to provide a method for manufacturing a heated cigarette rod, wherein the method uses a device for manufacturing a heated cigarette rod provided by the present invention to manufacture a heated cigarette rod, and comprises the following steps:

[0042] 1) unfolding rolled reconstituted tobacco leaves into tobacco leaves, and making the unfolded tobacco leaves have a constant tension;

[0043] 2) The unfolded tobacco leaves are transferred to a curling unit, and the curling unit forms a corrugated surface with an annular protrusion, so that the tobacco leaves are corrugated and bent in the transverse direction;

[0044] 3) The tobacco leaves are conveyed to a cutting unit, and the cutting unit cuts the tobacco leaves into a plurality of tobacco rods along the longitudinal direction;

[0045] Wherein, in the cutting area of ​​the first disc cutter and the second disc cutter of the cutting unit, the cut multiple tobacco rods are alternately wrapped around the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter;

[0046] 4) The plurality of tobacco rods are conveyed to a feeding unit, compressed air is applied to a converging hopper of the feeding unit, and the plurality of tobacco rods are pulled through a first traction roller and a second traction roller of the feeding unit to be conveyed straightly along a process direction.

[0047] In a preferred embodiment, when the cutting unit cuts the tobacco leaf into a plurality of tobacco rods along the longitudinal direction, the cleaning unit cleans the cutting unit, comprising the following steps:

[0048] 31) Preliminary cleaning,

[0049] The first comb-type scraper and the second comb-type scraper of the cleaning unit, 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;

[0050] 32) Clean again,

[0051] The plasma generator of the cleaning unit 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, so as to perform deep cleaning on the first annular knife groove and the second annular knife groove again;

[0052] 33) Waste collection;

[0053] The negative pressure fan of the cleaning unit generates negative pressure to collect the waste falling into the collection tank into the collection box.

[0054] The above technical solution of the present invention has at least the following beneficial effects compared with the prior art:

[0055] The present invention provides a manufacturing device and a manufacturing method for heating type cigarette rods, which are used for processing and feeding heat-not-burn cigarette rods, so that the tobacco rods pushed into the circular rods of tobacco base rods are distributed parallel to their axis and have consistent filling characteristics, and the production efficiency is higher and the material adaptability is wider.

[0056] The present invention provides a manufacturing device and a manufacturing method for heated cigarette tobacco rods. A supporting assembly is arranged on a cutting unit to support tobacco leaves during the cutting process to prevent the continuous tobacco rods after cutting from breaking in the annular knife grooves. The tobacco rods are pulled together by a converging funnel and a traction roller arranged on a feeding unit so that the tobacco rods can slide back and forth adaptively at a specific position of each circle of a group of traction roller pairs, thereby eliminating the cumulative error in transmission and effectively reducing the possibility of tobacco rods breaking during transmission.

[0057] The present invention provides a manufacturing device and a manufacturing method for heated cigarette rods. A curling unit forms a corrugated surface by arranging annular protrusions, and fixes the tobacco leaves in the lateral direction during the transmission process, thereby eliminating irregular local wrinkles on the tobacco leaves in the cutting area due to inconsistent cutting resistance of each tobacco rod, thereby ensuring the reliability of the cutting unit in cutting the tobacco leaves.

[0058] The present invention provides a manufacturing device and a manufacturing method for a heated cigarette rod. By arranging a cleaning unit, the powder generated during the tobacco leaf cutting process can be cleaned timely and deeply, thereby ensuring the reliability of the cutting unit in cutting the tobacco leaf.

[0059] The present invention provides a manufacturing device and a manufacturing method for heated cigarette tobacco rods, which can achieve reliable cutting of low-strength rolled reconstituted tobacco leaves and greatly reduce the amount of broken tobacco rods and lower transmission losses, so that the provided tobacco rods can be distributed parallel to the axis of the circular strips of tobacco base rods formed by downstream molding equipment, thereby obtaining higher consistency of finished products and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0061] Figure 1 It is a schematic structural diagram of a device for manufacturing heated cigarette rods of the present invention.

[0062] Figure 2 It is a structural schematic diagram of the unwinding unit of the present invention.

[0063] Figure 3 It is a schematic structural diagram of the cutting unit of the present invention.

[0064] Figure 4 It is a schematic diagram of the first disc cutter and the second disc cutter meshing with each other according to the present invention.

[0065] Figure 5It is a schematic diagram of feeding tobacco leaves into a cutting unit according to the present invention.

[0066] Figure 6 It is a schematic diagram of cutting tobacco leaves of the present invention into a plurality of tobacco rods.

[0067] Figure 7 Schematic diagram of a cross section of a first air guide block in one embodiment of the present invention.

[0068] Figure 8 It is a schematic diagram of the first air guide block of the present invention being placed between the second disc cutter and the corresponding first annular cutter groove.

[0069] Fig. 9 Schematic diagram of a cross section of a second air guide block in one embodiment of the present invention.

[0070] Fig.10 It is a schematic diagram of the second air guide block of the present invention being placed between the first disc cutter and the corresponding second annular cutter groove.

[0071] Fig.11 It is a schematic diagram of the movement trajectory of tobacco sheets cut into tobacco rods when no supporting assembly is provided.

[0072] Fig.12 It is a schematic diagram of the cutting unit cutting tobacco sheets when a first air guide block is arranged between the second disc cutter and the corresponding first annular knife groove of the present invention.

[0073] Fig.13 It is a schematic diagram of the movement trajectory of tobacco sheets cut into tobacco rods when a first air guide block is arranged between the second disc cutter and the corresponding first annular knife groove of the present invention.

[0074] Fig.14 It is a schematic diagram of the second disc cutter of the present invention cutting a tobacco sheet.

[0075] Fig.15 It is a schematic diagram of the cutting unit cutting tobacco sheets when a second air guide block is arranged between the first disc cutter and the corresponding second annular knife groove of the present invention.

[0076] Fig.16 It is a schematic diagram of the first disc cutter of the present invention cutting a tobacco sheet.

[0077] Fig.17 It is a schematic structural diagram of the curling unit of the present invention.

[0078] Fig.18 It is a structural schematic diagram of the feeding unit of the present invention.

[0079] Fig.19 It is a schematic diagram of a gap formed between the outer circumference of the first traction roller and the outer circumference of the second traction roller of the present invention.

[0080] Fig. 20 It is a cross-sectional schematic diagram of the converging funnel of the present invention.

[0081] Fig.21 It is a schematic structural diagram of the first air jet device of the present invention.

[0082] Fig. 22 It is a schematic structural diagram of the second air jet device of the present invention.

[0083] Fig.23 It is a schematic structural diagram of the cleaning unit of the present invention. DETAILED DESCRIPTION

[0084] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0085] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0086] It should be noted that the terms "up", "down", "left", "right", "front", "back", etc. used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0087] like Figure 1 The figure shows a schematic structural diagram of a device for manufacturing a heated cigarette rod according to the present invention. According to an embodiment of the present invention, a device for manufacturing a heated cigarette rod is provided, which is used for processing and feeding heat-not-burn cigarette rods.

[0088] In traditional cigarettes, the short mixed shreds of leaf shreds, stem shreds, etc. are usually mixed in proportion and are called shredded tobacco. These shredded tobacco are irregularly filled into the wrapping paper to make cigarette products. In order to distinguish them from the short shredded tobacco of traditional cigarettes, the continuous shredded tobacco made of rolled reconstituted tobacco leaves will be collectively referred to as tobacco rods below.

[0089] The present invention unfolds low-strength rolled reconstituted tobacco leaves into tobacco leaves P, cuts the tobacco leaves P into tobacco rods P' (such as Figure 6 The cut tobacco rod P' is transferred to the downstream process, and the downstream process pushes the tobacco rod P' into the round strip of the tobacco base rod to form the tobacco base rod. The present invention is directed to the cutting of the tobacco sheet P and the transfer of the tobacco rod P'. The process of pushing the downstream tobacco rod P' into the round strip of the tobacco base rod can be processed according to the prior art, and will not be repeated in the following embodiments of the present invention.

[0090] According to an embodiment of the present invention, a manufacturing device for heated cigarette rods includes an unwinding unit 1, a curling unit 4, a cutting unit 2 and a feeding unit 3 arranged in sequence along a process direction, and a cleaning unit 5 arranged below the cutting unit 2.

[0091] 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. Figure 1 In the embodiment shown, 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.

[0092] After the low-strength rolled reconstituted tobacco leaves are unfolded into tobacco leaves P by the unwinding unit 1, they enter the curling unit 4 which limits the torsional movement of the tobacco leaves P in the lateral direction, and then pass through the cutting unit 2 to be cut flatly into multiple tobacco rods P'. The cleaning unit 5 performs efficient online automatic cleaning on the cutting unit 2, and the feeding unit 3 conveys the multiple cut tobacco rods P' straight and orderly, gathers the ends and sends them to the downstream equipment.

[0093] like Figure 2 The structural schematic diagram of the unwinding unit of the present invention is shown. According to an embodiment of the present invention, the unwinding unit 1 is used to unfold the rolled reconstituted tobacco into tobacco leaves P, and make the unfolded tobacco leaves P have a constant tension.

[0094] In the embodiment of the present invention, the unwinding unit 1 includes two reels 101, and the two reels 101 are respectively wound with rolled reconstituted tobacco leaves. In the embodiment of the present invention, when the rolled reconstituted tobacco leaves on one reel 101 are fully unfolded (or nearly fully unfolded), the rolled reconstituted tobacco leaves on the other reel 101 are unfolded and spliced ​​with it, so that the unfolded tobacco leaves P are continuously processed in the downstream process, and the online splicing and continuous supply of the tobacco sheets P are achieved through the cyclic switching of the rolled reconstituted tobacco leaves on the two reels 101.

[0095] In some embodiments, only one reel may be provided, and the rolled reconstituted tobacco on the reel 101 may be arranged specifically according to the actual production scale.

[0096] 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 .

[0097] The rolled reconstituted tobacco leaves on the reel 101 are wound on a rotating shaft 103, and the rotating shaft 103 is connected to a power machine 102. The power machine 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 reel 101 and unfolding the rolled reconstituted tobacco leaves on the reel 101 into tobacco leaves P.

[0098] In the embodiment of the present invention, the connecting device 104 splices the tobacco sheets P unrolled from the two reels 101 together, and transmits them to the curling unit 4 after being guided by the guide roller 105, so that the unrolled tobacco sheets P have a constant tension.

[0099] According to the present invention, the curling unit 4 is used to generate corrugated bends in the horizontal direction on the unfolded tobacco sheet P. In the embodiment of the present invention, 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. Figure 2 shown.

[0100] like Figure 1 As 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, such as Fig.17 As shown. A plurality of annular protrusions 401 form a corrugated surface. When the tobacco leaf P is wrapped in the curling unit 4, the corrugated surface formed by the plurality of annular protrusions 401 causes the tobacco leaf P to generate corrugated bending in the lateral direction, thereby limiting the torsional movement of the tobacco leaf P in the lateral direction.

[0101] The multiple annular protrusions 401 arranged on the outer circumference of the curling unit 4 form a corrugated surface, which is transferred to the tobacco leaves P, so that the tobacco leaves P are slightly curled in the transverse direction to produce corrugated bends. The corrugated bends produced by the tobacco leaves P cooperate with the corrugated surface of the curling unit 4 to fix the tobacco leaves P in the transverse direction. By selecting certain parameters for the tobacco leaves P to produce corrugated bends in the transverse direction, the curling unit 4 can locally produce the expected transverse resistance when the tobacco leaves P move in the transverse direction. When the cutting unit 2 cuts the tobacco leaves P in the form of a reaction force, each cutting point offsets the transverse tension deviation of the tobacco leaves P caused by the inconsistent cutting resistance, eliminates the irregular local wrinkles of the tobacco leaves P in the cutting area, and thus improves the reliability of the cutting of the tobacco leaves P by the cutting unit 2.

[0102] like Figure 3The schematic structural diagram of the cutting unit of the present invention is shown in FIG. Figure 4 The schematic diagram of the first disc cutter and the second disc cutter of the present invention meshing with each other is shown. According to an embodiment of the present invention, the cutting unit 2 is used to cut the tobacco leaf P into a plurality of tobacco rods P' along the longitudinal direction.

[0103] The cutting unit 2 includes a knife frame 201, a drive motor 210, and a first knife roller 202 and a second knife stick 203 arranged in a transverse direction. The first knife roller 202 and the second knife roller 203 are installed on the knife frame 201, and the drive motor 210 drives the first knife roller 202 and the second knife stick 203 to rotate in the opposite direction synchronously with the running speed of the tracking device. In one embodiment, the drive motor 210 drives the first knife roller 202 and the second knife stick 203 to rotate in the opposite direction by means of gear transmission.

[0104] A plurality of alternately arranged first disc cutters 204 are arrayed on the first knife roller 202, and a plurality of alternately arranged second disc cutters 206 are arrayed on the second knife roller 203. The plurality of first disc cutters 204 and the plurality of second disc cutters 206 are meshed with each other to cut the tobacco leaf P transmitted to the cutting unit 2 into a plurality of tobacco rods P' along the longitudinal direction, and at the same time drive the cut plurality of tobacco rods P' to be transmitted along the process direction.

[0105] Specifically, first cutting surfaces 208 are formed on both sides of the first disc cutter 204, and second cutting surfaces 209 are formed on both sides of the second disc cutter 206. A plurality of first annular cutter grooves 205 are formed between the plurality of alternately arranged first disc cutters 204, and a plurality of second annular cutter grooves 207 are formed between the plurality of alternately arranged second disc cutters 206.

[0106] 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 that the plurality of first disc cutters 204 and the plurality of second disc cutters 206 are meshed with each other.

[0107] The tobacco leaf P enters the cutting area (engaging area) of the first disc cutter 204 and the second disc cutter 206, and is clamped and fixed at the starting point of the cutting area between the first disc cutter 204 and the second disc cutter 206. The outer circumferential surface of the first disc cutter 204 gradually squeezes the tobacco leaf P into the second annular cutter groove 207, while the outer circumferential surface of the second disc cutter 206 gradually squeezes the tobacco leaf P into the first annular cutter groove 205, so that the tobacco leaf P is torn between the first cutting surface 208 and the adjacent second cutting surface 209, thereby achieving cutting. Figure 5 The schematic diagram of the tobacco leaf of the present invention being fed into the cutting unit is shown, Figure 6 The schematic diagram shown is of the tobacco leaf of the present invention being cut into a plurality of tobacco rods.

[0108] In some embodiments, the distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s=0-0.08 mm. The tobacco leaf P is clamped and fixed at the starting point of each cutting area, and the tobacco leaf P is torn by the first cutting surface 208 of the first disc cutter 204 and the second cutting surface 209 of the second disc cutter 206 to achieve cutting. The distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s=0-0.08 mm. When cutting the tobacco leaf P made of low-strength flexible material under this gap, the cutting force is minimal, and the obtained tobacco rod P' has better cutting quality.

[0109] According to an embodiment of the present invention, a support assembly 211 is disposed between the first knife roller 202 and the second knife roller 203. The support assembly 211 is configured to: in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206, 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.

[0110] 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 via a connecting member (not shown in the figure).

[0111] like Figure 7 FIG. 1 is a schematic cross-sectional view of a first air guide block in one embodiment of the present invention. Figure 8 The schematic diagram shown is that the first air guide block of the present invention is placed between the second disc cutter and the corresponding first annular knife 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 is provided with a first blowing groove 2114.

[0112] The first air blowing slot 2114 is located in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206 and faces the second disc cutter 206 .

[0113] like Fig. 9 FIG. 4 is a schematic cross-sectional view of a second air guide block in one embodiment of the present invention. Fig.10 The schematic diagram of the second air guide block of the present invention being placed between the first disc cutter and the corresponding second annular knife groove is shown. 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 defines a second blowing groove 2116.

[0114] The second air blowing slot 2116 is located in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206 and faces the first disc cutter 204 .

[0115] like Fig.11 The schematic diagram of the motion trajectory of tobacco sheets cut into tobacco rods when no support assembly is provided is shown. When no support assembly 211 is provided, tobacco sheets P are fed in from the feeding point O1, and the cut tobacco rods P' are led out from the leading-out point O2. When the second disc cutter 206 is pressed into the first annular knife groove 205 to cut the tobacco sheets P, the cut tobacco rods P' deviate upward from the rotation center O of the second disc cutter 206 at the leading-out point O2, and the linear speed of the cut tobacco rods P' changes.

[0116] Similarly, when the first disc cutter 204 is pressed into the second annular knife groove 207 to cut the tobacco leaves P, the cut tobacco rod P' deviates downward from the rotation center of the first disc cutter 204 at the lead-out point, and the linear speed of the cut tobacco rod P' changes.

[0117] In order to solve the problem of changes in the linear speed of the cut tobacco rod P′, the present invention provides a support assembly 211 between the first knife roller 202 and the second knife roller 203 .

[0118] like Fig.12 The schematic diagram of the cutting unit cutting the tobacco sheet when the first air guide block is arranged between the second disc cutter and the corresponding first annular cutter groove of the present invention is shown as follows. Fig.13 The schematic diagram of the movement trajectory of the tobacco sheet being cut into tobacco rods when the first air guide block is arranged between the second disc cutter and the corresponding first annular cutter groove of the present invention is shown. Fig.14 The schematic diagram of the second disc cutter of the present invention cutting tobacco sheets is shown, and the tobacco leaves P are fed from the feeding point O1. When the second disc cutter 206 is pressed into the first annular knife groove 205 to cut the tobacco leaves P, compressed air is input into the first air inlet 2113 of the first air guide block 2111, and in the cutting area between the first disc cutter 204 and the second disc cutter 206, the compressed air is blown downward from the first blowing groove 2114 to squeeze the tobacco rod P'.

[0119] When the second disc cutter 206 is pressed into the first annular knife groove 205 to cut the tobacco leaves P, compressed air is blown out from the first air outlet 2113' of the first air guide block 2111, and the compressed air blows downward to squeeze the tobacco rod P' in the outlet area.

[0120] The first blowing groove 2114 blows air downward to squeeze the tobacco rod P' in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206, and compressed air blows air downward to squeeze the tobacco rod P' in the lead-out area, so that in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206, the cut multiple tobacco rods P' are wrapped on the outer circumferential surface of the second disc cutter 206.

[0121] From the feeding point O1 to the outlet point O2, the tobacco rod P' wraps the outer circumference of the second disc cutter 206, and the tobacco rod P' in the cutting area between the feeding point O1 and the outlet point O2 is close to the outer circumference of the second disc cutter 206 and rotates synchronously, and the distance between the cut tobacco rod P' and the rotation center O of the second disc cutter 206 at the outlet point O2 does not change. According to the formula V = 2πRn, the rotation speed n, the radius R, and the linear speed will not change, and the first air guide block 2111 is extremely beneficial to the stable transportation of the tobacco rod P'.

[0122] Similarly, if Fig.15 The schematic diagram of the cutting unit cutting tobacco sheets when a second air guide block is arranged between the first disc cutter and the corresponding second annular cutter groove of the present invention is shown. Fig.16 The schematic diagram of the first disc cutter of the present invention cutting tobacco sheets is shown. When the first disc cutter 204 is pressed into the second annular knife groove 207 to cut the tobacco sheet P, the second air inlet 2115 of the second air guide block 2112 inputs compressed air, and in the cutting area between the first disc cutter 204 and the second disc cutter 206, the compressed air blows upwards to the tobacco rod P' through the second blowing groove 2116 to squeeze the tobacco rod P'.

[0123] When the first disc cutter 204 is pressed into the second annular knife groove 207 to cut the tobacco leaves P, compressed air is blown out from the second air outlet 2115' of the second air guide block 2112, and the compressed air blows upward to squeeze the tobacco rod P' in the outlet area.

[0124] By blowing air upwards to squeeze the tobacco rod P' in the second blowing grooves 2116 and blowing compressed air upwards to squeeze the tobacco rod P' in the lead-out area, multiple tobacco rods P' are wrapped around the outer circumferential surface of the first disc cutter 204 in the cutting area of ​​the first disc cutter 204 and the second disc cutter 206.

[0125] From the feeding point O1 to the outlet point O2, the tobacco rod P' wraps the outer circumference of the first disc cutter 204, and the tobacco rod P' in the cutting area between the feeding point O1 and the outlet point O2 is close to the outer circumference of the first disc cutter 204 and rotates synchronously, and the distance between the cut tobacco rod P' and the rotation center of the first disc cutter 204 at the outlet point O2 does not change. According to the formula V = 2πRn, the rotation speed n, the radius R, and the linear speed will not change, and the second air guide block 2112 is extremely beneficial to the stable transportation of the tobacco rod P'.

[0126] In the present invention, a support assembly 211 is disposed between the first knife roller 202 and the second knife roller 203. In the cutting area of ​​the first disc cutter 204 and the second disc cutter 206, the cut multiple tobacco rods P' are alternately wrapped with the outer circumferential surface of the first disc cutter 204 and the outer circumferential surface of the second disc cutter 206, so that the cut multiple tobacco rods P' can be more flat and in the same plane. Figure 6 A support assembly 211 is arranged between the first knife roller 202 and the second knife roller 203, so that the tobacco rod P' not only obtains good flexible support, but also has a consistent linear speed during the cutting process, effectively improving the cutting dimensional accuracy, greatly reducing the broken wire rate of the tobacco rod P' after cutting, improving the cutting dimensional accuracy, and improving the continuous production efficiency of the equipment.

[0127] In some embodiments, on the side where the tobacco leaves P are 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 away from each other to ensure that the tobacco leaves P can smoothly enter the cutting unit 2 for cutting.

[0128] Fig.17 The structural schematic diagram of the curling unit of the present invention is shown, and 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 curling unit 4 and the axis center of the first knife roller 202 and the axis center of the second knife roller 203 is 0.5 to 1.5 times the transverse width of the tobacco leaf P, and by adjusting the guide roller 105, the wrapping angle β of the tobacco leaf P on the curling unit 4 is set to 60° to 180°.

[0129] In a further embodiment, the distance A between the curling unit 4 and the axis center of the first knife roller 202 and the axis center of the second knife roller 203 is 50 mm to 150 mm.

[0130] like Fig.18 The structural schematic diagram of the feeding unit of the present invention is shown in FIG. Fig.19The schematic diagram of the gap formed between the outer circumference of the first traction roller and the outer circumference of the second traction roller of the present invention is shown, and the feeding unit 3 is arranged on the downstream side of the cutting unit 2, and the cut tobacco rods P' are transported straight to the feeding unit 3, and the feeding unit 3 is used to pull multiple tobacco rods P' and transport them straight along the process direction. The feeding unit 3 extends from the tobacco rod P' outlet point of the cutting unit 2 to the inlet end of the downstream equipment.

[0131] The feeding unit 3 includes at least one set of traction roller pairs, a first plane groove plate 305 , a second plane groove plate 306 , a converging funnel 301 , a motor 304 and a negative pressure suction nozzle 307 .

[0132] The traction roller pair includes a first traction roller 302 and a second traction roller 303. The surface of the first traction roller 302 is provided with at least one strip groove 3021 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 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 tobacco rod P'.

[0133] The installation axis of the first traction roller 302 is parallel to the axis of the first blade roller 202, and the installation axis of the second traction roller 303 is parallel to the axis of the second blade 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 tobacco rod P'. When the tobacco rod P' enters the gap between the first traction roller 302 and the second traction roller 303, a certain pressure is formed on the tobacco rod P'. The motor 304 drives the first traction roller 302 and the second traction roller 303 to rotate in opposite directions, and in accordance with the production speed of the equipment, the tobacco rod P' is pulled forward by the clamping force.

[0134] When the strip groove 3021 of the first traction roller 302 rotates to the traction position of the tobacco rod P' (the strip groove 3021 is opposite to 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 and becomes the gap C1 between the edge of the strip groove 3021 and the outer circumference of the second traction roller 303 (greater than the thickness of the tobacco rod P'). At this time, the first traction roller 302 and the second traction roller 303 have no pressure on the tobacco rod P', and the tobacco rod P' can slide back and forth adaptively between the first traction roller 302 and the second traction roller 303.

[0135] According to an embodiment of the present invention, the first flat groove plate 305 and the second flat groove plate 306 are arranged flatly on both sides of the traction roller pair, and the bottom surfaces of the first flat groove plate 305 and the second flat groove plate 306 are respectively provided with a plurality of dust suction holes, the convergence 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 knife roller 202 and the second knife stick 203. Fig. 20 The cross-sectional schematic diagram of the converging funnel of the present invention is shown, the converging funnel 301 has a venturi tube structure inside, and the converging funnel 301 is provided with a nozzle 308, and compressed air is introduced into the converging funnel 301 through the nozzle 308.

[0136] The inlet end of the converging funnel 301 is square, which is convenient for the tobacco rods P' to enter. The outlet end of the converging funnel 301 gradually shrinks to a circle, which is used to gather the tobacco rods P'. After the multiple tobacco rods P' are gathered, they are transported to the downstream equipment through the outlet end of the converging funnel 301.

[0137] Specifically, the nozzle 308 continuously supplies air to the venturi tube structure inside the converging funnel 301, so that 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 inhales the tobacco rods P' conveyed by the first traction roller 302 and the second traction roller 303, and gathers the tobacco rods P'. After the multiple tobacco rods P' are gathered, they are transported to the downstream equipment from the outlet end of the converging funnel 301.

[0138] It is advantageous to pre-gather the flat tobacco rods P' before forming the tobacco base rod. For example, pre-gathering can make the tobacco rods P' obtain smaller forming resistance when being pushed into the round strip of the tobacco base rod, and further make the tobacco rods P' on both sides move closer to the central axis of the round strip of the tobacco base rod at a slow lateral movement speed, so as to better facilitate the tobacco rods P' to obtain a straight arrangement in the round strip of the tobacco base rod.

[0139] 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 rod of the tobacco base rod.

[0140] It is essentially difficult to extract the soft and weak tobacco rod P' from the multiple first annular knife grooves 205 and the multiple second annular knife grooves 207 of the cutting unit 2. The first traction roller 302 and the second traction roller 303 can stably maintain the pre-tightening force applied to the tobacco rod P' during the operation of the equipment. The pre-tightening force can ensure the straight and orderly transmission of the tobacco rod P', facilitate the subsequent lateral gathering and parallel distribution in its axial direction, keep the flat posture of the tobacco rod P' unchanged, and effectively enable the tobacco rod P' to be smoothly extracted from the cutting unit 2.

[0141] 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 the manufacturing and control precision. Therefore, when the tobacco rod P' is transmitted 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, a cumulative error will occur. If the error exceeds a certain value, the tobacco rod P' will be broken, entangled with the rollers, and arranged in disorder, etc., which seriously restricts the equipment efficiency and the quality of finished product production.

[0142] The surface of the first traction roller 302 of the present invention is provided with at least one strip groove 3021 along the axial direction of the first traction roller 302, and 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 is rotated until the strip groove 3021 is opposite to 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 tobacco rod P'.

[0143] A converging funnel 301 is provided on the downstream side of the second planar groove plate 306, and the venturi tube structure inside the converging funnel 301 continuously provides compressed air through the nozzle 308, so that a negative pressure is generated at the outlet end of the converging funnel 301, and under the action of the pressure difference, the tobacco rod P' is continuously and flexibly pulled during operation. Furthermore, when the strip groove 3021 of the first traction roller 302 rotates to the traction position of the tobacco rod P' (the strip groove 3021 is opposite to the second traction roller 303), the tobacco 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.

[0144] The present invention adjusts the flexible traction force of the tobacco rod P' in the converging funnel 301 so that the tobacco rod P' can slide back and forth adaptively under negative pressure traction when passing 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, thereby eliminating the cumulative error of transmission and preventing the tobacco rod P' from breaking, entanglement with the rollers, and disordered arrangement.

[0145] In some embodiments, a buffer is provided between the outlet of the converging funnel 301 and the downstream device to ensure that the tobacco rods P' are stably delivered to the downstream device. For example, a certain buffer volume is formed by speed control, and the buffer volume can be used to compensate for the transmission error of the tobacco rods P'.

[0146] According to an embodiment of the present invention, when multiple tobacco rods P' are delivered to the feeding unit 3, the multiple tobacco rods P' are delivered above the first planar groove plate 305 and the second planar groove plate 306. In some embodiments, the distance between the multiple tobacco rods P' and the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 is 0-1 mm.

[0147] In a further embodiment, the distances between the plurality of tobacco rods P′ and the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 are adjustable.

[0148] In a further embodiment, the tobacco rod P′ may slightly contact the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 when the tobacco rod P′ is tensioned.

[0149] Since the tobacco rod P' has the characteristics of low strength, high flexibility and easy breakage, it is necessary to provide certain support for the tobacco rod P' to help it be transported. The present invention provides certain support for the tobacco rod P' through the first planar groove plate 305 and the second planar groove plate 306 to help it be transported.

[0150] Since the tobacco rods P' need to be slightly tensioned during transportation, the slightly tensioned tobacco rods P' will essentially vibrate during high-speed transportation, which will inevitably lead to the breakage of individual tobacco rods P'. The torsion treatment of the tobacco rods P' by the first and second planar groove plates 305, 306 can effectively suppress their vibration.

[0151] In addition, objectively, the first traction roller 302 and the second traction roller 303, and the plurality of first annular knife grooves 205 and the plurality of second annular knife grooves 207 cannot completely achieve the same linear speed due to the manufacturing and control accuracy, and the breakage of the tobacco rod P' between the pair of traction rollers and the cutting unit cannot be completely avoided. The present invention supports the tobacco rod P' by the first plane groove plate 305 and the second plane groove plate 306, and the front section of the broken tobacco rod P' is kept to be transported forward under the flexible traction of the convergence funnel 301. The rear section of the broken tobacco rod P' is pulled forward by the friction generated by the surrounding tobacco rod P' in normal transportation. 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, the tightening force is established again to achieve straight and orderly transportation, so that the broken tobacco rod P' can be maintained on the predetermined path of tobacco rod P' transportation, avoiding irreversible material loss.

[0152] According to an embodiment of the present invention, a plurality of dust suction holes are respectively provided on the bottom surfaces of the first plane groove plate 305 and the second plane groove plate 306, and the plurality of dust suction holes are connected to the negative pressure fan 507 (described below) through a negative pressure suction nozzle 307 to promptly suck away waste (dust, smoke, etc.) on the upper surfaces of the first plane groove plate 305 and the second plane groove plate 306.

[0153] In one embodiment, the diameter of the plurality of dust suction holes formed on the bottom surfaces of the first planar groove plate 305 and the second planar groove plate 306 is less than 2 mm.

[0154] The present invention performs cleaning treatment during the cutting of tobacco leaves P and the conveying of tobacco rods P', such as Fig.21The schematic diagram of the structure of the first air jet device of the present invention is shown in FIG. Fig. 22 The schematic diagram of the structure of the second air jet device of the present invention is shown in FIG. Fig.23 The schematic diagram of the structure of the cleaning unit of the present invention is shown. The device for manufacturing a heated cigarette rod provided by the present invention further includes a cleaning unit 5, and the cleaning unit 5 is arranged below the cutting unit 2.

[0155] 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 collecting tank 509, a collecting box 508, a negative pressure delivery pipeline 505, a filter 506 and a negative pressure fan 507.

[0156] The first air jet device 501A is installed on the knife holder 201, and the 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 cutters 204. The first comb-type scraper 502A scrapes off sticky waste (dust, smoke, etc.) in the first annular knife grooves 205. The first air jet device 501A cleans the first annular knife grooves 205 through high-speed airflow combined with the first comb-type scraper 502A.

[0157] 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-type scraper 502A. The first air inlet 501A1 of the first air jet device 501A introduces a high-speed airflow to clean the first annular knife groove 205 and remove waste (dust, smoke, etc.) in the first annular knife groove 205.

[0158] Similarly, the second air jet device 501B is installed on the knife holder 201, and the 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 cutters 206. The second comb-type scraper 502B scrapes off the sticky waste (dust, smoke, etc.) in the first annular knife groove 205. The second air jet device 501B cleans the second annular knife groove 207 through high-speed airflow combined with the second comb-type scraper 502B.

[0159] 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-type 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 waste (dust, smoke, etc.) in the second annular knife groove 207.

[0160] The plasma generator 503 is connected to the first plasma nozzle 504A and the second plasma nozzle 504B. The first plasma nozzle 504A and the second plasma nozzle 504B are respectively located on the other side of the first knife roller 202 and the second knife roller 203. The first plasma nozzle 504A faces the first annular knife groove 205, and the second plasma nozzle 504B faces the second annular knife groove 207. The first plasma nozzle 504A and the second plasma nozzle 504B are respectively installed on the knife holder 201.

[0161] The plasma generator 503 introduces 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 deeply clean the parts that cannot be treated by the first air jet device 501A, the second air jet device 501B, the first comb scraper 502A and the second comb scraper 502B.

[0162] The collecting tank 509 is located below the second disc cutter 206, and the collecting box 508 is located below the collecting tank 509 and connected to the collecting tank 509 through a pipeline. The negative pressure delivery pipeline 505 connects the collecting box 508 and the negative pressure fan 507, and a filter 506 is arranged on the negative pressure delivery pipeline 505.

[0163] The waste (dust, smoke, etc.) that falls after cleaning with the first annular knife groove 205 falls onto the first planar groove plate 305, and the waste (dust, smoke, etc.) that falls after cleaning with the second annular knife groove 207 falls into the collecting groove 509. The negative pressure fan 507 draws air to generate negative pressure in the collecting box 508, and the waste (dust, smoke, etc.) enters the collecting box 508 from the collecting groove 509 and the bottom of the first planar groove plate 305. At the same time, a filter 506 is arranged on the negative pressure conveying pipe 505 to filter the waste (dust, smoke, etc.) in the gas during the extraction process to prevent the waste from being drawn out of the collecting box 508.

[0164] The negative pressure fan 507 of the present invention is connected to the negative pressure suction nozzle 307, and the negative pressure fan 507 draws air to promptly suck away waste (dust, smoke, etc.) on the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306.

[0165] According to an embodiment of the present invention, a method for manufacturing a heated cigarette rod is provided. The heated cigarette rod is manufactured by using a device for manufacturing a heated cigarette rod provided by the present invention, and the method comprises the following steps:

[0166] 1) Unrolling the rolled reconstituted tobacco into tobacco leaves P, and making the unfolded tobacco leaves P have a constant tension.

[0167] The rolled reconstituted tobacco on the reel 101 is wound on a rotating shaft 103, and the rotating shaft 103 is connected to a power machine 102. The power machine 102 synchronously tracks the production speed of the equipment and adaptively drives the rotating shaft 103 to rotate, thereby unfolding the rolled reconstituted tobacco on the reel 101, and unfolding the rolled reconstituted tobacco on the reel 101 into tobacco leaves P, which are guided by guide rollers 105 and then transmitted to the curling unit 4, so that the unfolded tobacco leaves P have a constant tension.

[0168] 2) The unfolded tobacco leaves P are transferred to the curling unit 4, and the curling unit 4 causes the tobacco leaves P to be wavy and curved in the transverse direction through the corrugated surface formed by the annular protrusions.

[0169] 3) The tobacco leaves P are transferred to the cutting unit 2, and the cutting unit 2 cuts the tobacco leaves P into a plurality of tobacco rods P' along the longitudinal direction.

[0170] In the cutting area of ​​the first disc cutter 204 and the second disc cutter 206 of the cutting unit 2 , the cut 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 .

[0171] When the cutting unit 2 cuts the tobacco leaf P into a plurality of tobacco rods P' along the longitudinal direction, the cleaning unit 5 cleans the cutting unit 2, including the following steps:

[0172] 31) Preliminary cleaning.

[0173] The first comb-type scraper 502A and the second comb-type scraper 502B of the cleaning unit 5 , in combination with the high-speed airflow introduced by the first air jet device 501A and the second air jet device 501B, clean the first annular knife groove 205 and the second annular knife groove 207 , respectively.

[0174] When the first knife roller 202 and the second knife roller 203 rotate circumferentially, the waste (dust, smoke, etc.) attached to the first annular knife groove 205 and the second annular knife groove 207 is mechanically squeezed with the stationary first comb-type scraper 502A and the second comb-type scraper 502B respectively, thereby achieving chip removal, and 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, smoke, etc.) is removed from the first annular knife groove 205 and the second annular knife groove 207.

[0175] 32) Clean again.

[0176] The plasma generator 503 of the cleaning unit 5 generates plasma, and introduces the plasma 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, so as to perform deep cleaning on the first annular knife groove 205 and the second annular knife groove 207 again.

[0177] The active atomic oxygen in the plasma can quickly oxidize the main sticky material components in the reconstituted tobacco leaves, such as pectin, propylene glycol, glycerol and spices, into volatile gases or modify them, thereby greatly reducing the viscosity of the tobacco dust and powder in the first annular knife groove 205 and the second annular knife groove 207, thereby avoiding the condensation of waste (dust, tobacco dust, etc.) in the areas that cannot be cleaned by the first comb-type scraper 502A and the first air jet device 501A in the first annular knife groove 205 and the second comb-type scraper 502B and the second air jet device 501B in the second annular knife groove 207, and causing the waste (dust, tobacco dust, etc.) to be automatically removed under the action of gravity.

[0178] 33) Waste collection.

[0179] The negative pressure fan 507 of the cleaning unit 5 generates negative pressure to collect the waste falling into the collecting trough 509 and the bottom of the first planar groove plate 305 into the collecting box 508 .

[0180] 4) Multiple tobacco rods P' are transferred to the feeding unit 3. Compressed air is applied to the converging funnel 301 of the feeding unit 3, and the multiple tobacco rods P' are pulled by the first traction roller 302 and the second traction roller 303 of the feeding unit 3 to be transferred straightly along the process direction.

[0181] During the process of the multiple tobacco rods P' being conveyed straightly along the process direction through the feeding unit 3, compressed air is applied in the converging funnel 301, and the multiple tobacco rods P' are pulled by the first pulling roller 302 and the second pulling roller 303 of the feeding unit 3. The surface of the first pulling roller 302 is provided with at least one strip groove 3021 along the axial direction of the first pulling roller 302. The gap C between the outer circumference of the first pulling roller 302 and the outer circumference of the second pulling roller 303 is smaller than the thickness of the tobacco rod P', and when the first pulling roller 302 rotates until the strip groove 3021 faces the second pulling roller 303, the gap C1 between the edge of the strip groove 3021 and the outer circumference of the second pulling roller 303 is larger than the thickness of the tobacco rod P'. When the tobacco rod P' passes through the gap C1 between the strip groove 3021 of the first pulling roller 302 and the outer circumference of the second pulling roller 303, it can slide back and forth adaptively under negative pressure traction to eliminate the cumulative error of conveying.

[0182] When the plurality of cigarette rods P' are conveyed in a straight line along the process direction by the feeding unit 3, the negative pressure fan 507 draws air and promptly sucks away the waste (dust, cigarette powder, etc.) on the upper surfaces of the first and second planar groove plates 305 and 306 through the negative pressure suction nozzle 307.

[0183] There are a few points to note:

[0184] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the general design.

[0185] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present invention, the thickness of the layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is 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 may be "directly" "on" or "under" the other element or there may be intermediate elements.

[0186] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0187] The above are only specific embodiments 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 based on the protection scope of the claims.

Claims

1. A device for manufacturing heated cigarette rods, characterized in that: The manufacturing device comprises an unwinding unit, a curling unit, a cutting unit and a feeding unit which are sequentially arranged along the process direction. The unwinding unit is used to unfold the rolled reconstituted tobacco leaves into tobacco leaves, and make the unfolded tobacco leaves have a constant tension; the curling unit is used to produce corrugated bends in the transverse direction on the unfolded tobacco leaves; The cutting unit is used to cut the tobacco leaves into multiple tobacco rods along the longitudinal direction; the feeding unit is used to pull the multiple tobacco rods and convey them straightly along the process direction; The cutting unit comprises a first knife roller and a second knife roller arranged in a transverse direction, 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 the first disc cutters are meshed with the plurality of the second disc cutters; Wherein, a support assembly is arranged between the first knife roller and the second knife roller, and the support assembly is configured to: in the cutting area of ​​the first disc cutter and the second disc cutter, make the cut multiple tobacco rods alternately wrap the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter; The support assembly includes a plurality of first air guide blocks and a plurality of second air guide blocks; A plurality of first annular cutter grooves are formed between the plurality of first disc cutters that are arranged alternately; a plurality of second annular cutter grooves are formed between the plurality of second disc cutters that are arranged alternately; A plurality of the first disc cutters are embedded in a plurality of the second annular cutter grooves, and a plurality of the second disc cutters are embedded in a plurality of the first annular cutter grooves; Wherein, the second air guide block is arranged between the first disc cutter and the corresponding second annular cutter groove, and the first air guide block is arranged between the second disc cutter and the corresponding first annular cutter groove; The first air guide block comprises a first air inlet and a first air outlet, and the first air guide block is provided with a first air blowing groove; The first air blowing slot is located in the cutting area of ​​the first disc cutter and the second disc cutter and faces the second disc cutter; The second air guide block comprises a second air inlet and a second air outlet, and the second air guide block is provided with a second air blowing groove; The second air blowing slot is located in the cutting area of ​​the first disc cutter and the second disc cutter and faces the first disc cutter; The feeding unit comprises at least one set of traction roller pairs, wherein the traction roller pairs comprise a first traction roller and a second traction roller; Wherein, at least one strip groove is provided on the surface of the first traction roller along the axial direction of the first traction roller. Among them, 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 tobacco rod, and when the first traction roller rotates until the strip groove faces 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 tobacco rod.

2. The manufacturing device according to claim 1, characterized in that: On the side where the tobacco leaves are introduced into the cutting unit, the head of the first air guide block and the head of the second air guide block are offset in directions away from each other.

3. The manufacturing device according to claim 1, characterized in that: The curling unit is arranged in the transverse direction, and a plurality of annular protrusions are provided on the outer circumference of the curling unit, and the plurality of annular protrusions form a corrugated surface; When the tobacco leaves are wrapped in the curling unit, the corrugated surface formed by the plurality of annular protrusions causes the tobacco leaves to generate corrugated bends in the transverse direction.

4. The manufacturing device according to claim 1, characterized in that: The feeding unit further comprises a first plane groove plate, a second plane groove plate and a converging funnel; The first plane groove plate and the second plane groove plate are arranged flatly on both sides of the traction roller pair, and a plurality of dust suction holes are respectively provided on the bottom surfaces of the first plane groove plate and the second plane groove plate; When a plurality of tobacco rods are conveyed to the feeding unit, the plurality of tobacco rods are conveyed above the first planar groove plate and the second planar groove plate; The converging funnel is arranged on the downstream side of the second plane groove plate, and the interior of the converging funnel is a Venturi tube structure.

5. The manufacturing device according to claim 1, characterized in that: The manufacturing device further comprises a cleaning unit; the cleaning unit is arranged below the cutting unit and comprises: a first air jet device and a second air jet device; A first comb-type scraper is installed on the first air jet device, the first comb-type scraper is located on one side of the first knife roller and is embedded in a plurality of first annular knife grooves formed between a plurality of first disc cutters arranged alternately; A second comb-type scraper is installed on the second air jet device, the second comb-type scraper is located on one side of the second knife roller and is embedded in a plurality of second annular knife grooves formed between a plurality of second disc cutters arranged alternately; The first air jet device cleans the first annular knife groove through high-speed airflow in combination with a first comb-type scraper; the second air jet device cleans the second annular knife groove through high-speed airflow in combination with a second comb-type scraper.

6. The manufacturing device according to claim 5, characterized in that: The cleaning unit 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 is directly opposite to the first annular knife groove, and the second plasma nozzle is directly opposite to the second annular knife groove.

7. The manufacturing device according to claim 5, characterized in that: The cleaning unit also includes a collection tank, a collection box, a negative pressure delivery pipeline, a filter and a negative pressure fan; The collecting tank is located below the second disc cutter, and the collecting box is located below the collecting tank and is connected to the collecting tank through a pipeline; The negative pressure delivery pipeline is connected to the collection box and the negative pressure fan, and the filter is arranged on the negative pressure delivery pipeline.

8. A method for manufacturing a heated cigarette rod, characterized in that: The method uses the manufacturing device according to any one of claims 1 to 7 to manufacture heated cigarette rods, comprising the following steps: 1) unfolding rolled reconstituted tobacco leaves into tobacco leaves, and making the unfolded tobacco leaves have a constant tension; 2) The unfolded tobacco leaves are transferred to a curling unit, and the curling unit forms a corrugated surface with an annular protrusion, so that the tobacco leaves are corrugated and bent in the transverse direction; 3) The tobacco leaves are conveyed to a cutting unit, and the cutting unit cuts the tobacco leaves into a plurality of tobacco rods along the longitudinal direction; Wherein, in the cutting area of ​​the first disc cutter and the second disc cutter of the cutting unit, the cut multiple tobacco rods are alternately wrapped around the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter; 4) The plurality of tobacco rods are conveyed to a feeding unit, compressed air is applied to a converging hopper of the feeding unit, and the plurality of tobacco rods are pulled through a first traction roller and a second traction roller of the feeding unit to be conveyed straightly along a process direction.

9. The manufacturing method according to claim 8, characterized in that: During the process of the cutting unit cutting the tobacco leaf into a plurality of tobacco rods in the longitudinal direction, the cleaning unit cleans the cutting unit, including the following steps: 31) Preliminary cleaning, The first comb-type scraper and the second comb-type scraper of the cleaning unit, 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; 32) Clean again, The plasma generator of the cleaning unit 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, so as to perform deep cleaning on the first annular knife groove and the second annular knife groove again; 33) Waste collection; The negative pressure fan of the cleaning unit generates negative pressure to collect the waste falling into the collection tank into the collection box.

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