CN116458672A

CN116458672A - Cutting device and cutting method for precisely cutting low-strength tobacco sheets

Info

Publication number: CN116458672A
Application number: CN202310370999.8A
Authority: CN
Inventors: 孔德邦; 何彦兵; 李小明; 高鹏; 王洪科; 王阳; 赵卫东
Original assignee: Kunming Dingcheng Technology Co ltd
Current assignee: Kunming Dingcheng Technology Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-07-21

Abstract

The invention provides a cutting device and a cutting method for precisely cutting low-strength tobacco sheets, wherein the cutting device comprises a first cutter roller and a second cutter roller which are transversely arranged, a plurality of first disc cutters are alternately arranged on the first cutter roller, a plurality of second disc cutters are alternately arranged on the second cutter roller, and the plurality of first disc cutters are meshed with the plurality of second disc cutters; a support assembly is disposed between the first knife roll and the second knife roll, the support assembly configured to: and in the cutting areas of the first disc cutter and the second disc cutter, alternately wrapping the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter by a plurality of cut tobacco strips. According to the invention, the supporting component is arranged on the cutting device, so that the tobacco sheets are supported in the cutting process, and the cut continuous tobacco strips are prevented from being broken in the annular knife groove, so that the width and the thickness of each cut tobacco strip are kept consistent as much as possible.

Description

Cutting device and cutting method for precisely cutting low-strength tobacco sheets

Technical Field

The invention relates to the technical field of cigarette embryo manufacturing equipment, in particular to a cutting device and a cutting method for accurately cutting low-strength tobacco sheets.

Background

Heated cigarettes generally refer to a system containing tobacco, heated by a separate heat source (e.g., electricity, aerosol, carbon), designed to produce an aerosol containing nicotine. According to the tests of a plurality of research institutions at home and abroad, compared with the traditional tobacco, the carcinogen in the heated cigarette is reduced by 80 percent compared with the traditional tobacco, and the harm of tobacco products to human bodies is greatly reduced, so that the heated cigarette is rapidly developed in recent years.

The existing heating non-burning cigarettes are mainly divided into a central heating type and a surface heating type according to different heating modes, wherein the central heating type has advantages in the consistency of smoke taste, smoking times and single smoke quantity, and takes an absolute leading role in the market. The center-heated cigarette is comprised of a plurality of short rods of differing function, typically including tobacco-based rods containing tobacco components, support rods, cooling rods, filter rods, and the like.

The tobacco base rod is the most core functional unit of the heating type cigarette, and is usually manufactured by expanding rolled reconstituted tobacco into tobacco sheets, embossing, curling or shredding, and wrapping with cigarette paper.

In the manufacturing process, on one hand, the requirements of the heated non-combustible cigarettes on the appearance quality and the internal smoking quality of cigarettes are high, and in the manufacturing process, the width and the thickness of each cigarette rod are required to be kept consistent as much as possible.

On the other hand, reconstituted tobacco used for tobacco rods is a regenerated product prepared by taking waste tobacco materials such as tobacco powder, tobacco stems, crushed tobacco flakes and the like in the cigarette process as raw materials and adding certain plasticizers, adhesives, moisture retention agents and the like, the tobacco sheets are uneven in material distribution in small local areas per se, the tensile strength is different, and the tobacco sheets are easy to break at the places with weak strength or large-particle nodules when processed by using the existing shredding technology.

On the other hand, the content of propylene glycol, glycerol and perfume in the reconstituted tobacco used for heating type cigarettes is far greater than that of the traditional reconstituted tobacco, and meanwhile, the fibers in the materials are small, so that the difference of physical properties of the two materials is large, the two materials are higher in viscosity and low in tensile strength, a large amount of sticky powder can be generated during processing, and the existing embossing or cutting processing method is extremely not suitable for the materials.

Disclosure of Invention

The invention provides a cutting device and a cutting method for accurately cutting low-strength tobacco leaves, which are used for solving the technical problems that tobacco rods cut by tobacco leaves are easy to break and the width and the thickness of each cut tobacco rod are difficult to be kept consistent in the process of manufacturing a tobacco base rod by using rolled reconstituted tobacco leaves in the prior art.

The technical scheme provided by the invention is as follows:

an object of the present invention is to provide a cutting device for precision cutting of low-strength tobacco leaves sheets for cutting the tobacco leaves sheets longitudinally into a plurality of tobacco rods;

the cutting device comprises a first cutter roller and a second cutter roller which are arranged transversely, wherein a plurality of first disc cutters which are alternately arranged are arranged on the first cutter roller, a plurality of second disc cutters which are alternately arranged are arranged on the second cutter roller, and the plurality of first disc cutters are meshed with the plurality of second disc cutters;

wherein a support assembly is disposed between the first knife roll and the second knife roll, the support assembly configured to: and in the cutting areas of the first disc cutter and the second disc cutter, alternately wrapping the outer circumferential surface of the first disc cutter and the outer circumferential surface of the second disc cutter by a plurality of cut tobacco strips.

In a preferred embodiment, 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 among the plurality of first disc cutters which are alternately arranged; a plurality of second annular cutter grooves are formed among the second disc cutters which are alternately arranged;

The plurality of first disc cutters are embedded into the plurality of second annular cutter grooves, and the plurality of second disc cutters are embedded into the plurality of first annular cutter grooves;

the second air guide blocks are arranged between the first disc type cutters and the corresponding second annular cutter grooves, and the first air guide blocks are arranged between the second disc type cutters and the corresponding first annular cutter grooves.

In a preferred embodiment, the first air guiding block comprises a first air inlet hole and a first air outlet hole, and the first air guiding block is provided with a first air blowing groove;

the first air blowing groove faces the second disc cutter in the cutting areas of the first disc cutter and the second disc cutter;

the second air guide block comprises a second air inlet hole and a second air outlet hole, and is provided with a second air blowing groove;

the second air blowing groove faces the first disc cutter in the cutting areas of the first disc cutter and the second disc cutter.

In a preferred embodiment, the head of the first air deflector and the head of the second air deflector are offset in a direction away from each other on the side of the tobacco sheet leading-in cutting device.

In a preferred embodiment, the cutting device further comprises a blade carrier and a drive motor,

the first knife roll and the second knife roll are arranged on the knife rest, and the driving motor drives the first knife roll and the second knife roll to rotate in opposite directions.

In a preferred embodiment, the first disc cutter is formed with a first cutting surface on both sides and the second disc cutter is formed with a second cutting surface on both sides.

In a preferred embodiment, the distance between the first cutting surface and the adjacent second cutting surface is 0-0.08 mm.

Another object of the present invention is to provide a cutting method for precision cutting of low-strength tobacco sheets, which utilizes the present invention to provide a cutting device for precision cutting of low-strength tobacco sheets, cutting of tobacco sheets, comprising:

the tobacco sheet is guided into the cutting device and enters a cutting area from a feeding point;

the second disc cutter is pressed into the first annular cutter groove to cut the tobacco sheets, the first disc cutter is pressed into the second annular cutter groove to cut the tobacco sheets,

wherein, the first air inlet hole of the first air guide block inputs compressed air, the compressed air blows downwards to the tobacco rod from the first blowing groove to extrude the tobacco rod in the cutting area of the first disc cutter and the second disc cutter,

Simultaneously, compressed air is input into a second air inlet hole of the second air guide block, and the compressed air blows upwards to the tobacco rod from a second blowing groove to extrude the tobacco rod in a cutting area of the first disc cutter and the second disc cutter;

the cut tobacco rod is guided out to the guiding-out area by the guiding-out point,

wherein the compressed air in the first air guide block is blown out by the first air outlet hole of the first air guide block, the compressed air blows downwards to the tobacco rod in the guiding-out area to extrude the tobacco rod,

simultaneously, compressed air in the second air guide block is blown out by the second air outlet hole of the second air guide block, and compressed air is blown upwards to the tobacco rod in the guiding-out area to extrude the tobacco rod.

Compared with the prior art, the technical scheme of the invention has at least the following beneficial effects:

the invention provides a cutting device and a cutting method for accurately cutting low-strength tobacco sheets, wherein a supporting component is arranged in the cutting device, so that the tobacco sheets are supported in the cutting process, and continuous tobacco strips after cutting are prevented from being broken in an annular cutter groove, the width and the thickness of each tobacco strip after cutting are kept consistent as much as possible, the production efficiency is higher, the breakage rate is lower, the appearance quality is better, the smoking quality is higher, and the material adaptability is wider.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a heating type cigarette rod manufacturing apparatus according to the present invention.

Fig. 2 is a schematic structural view of the unreeling unit of the present invention.

Fig. 3 is a schematic view of the structure of the cutting device of the present invention.

Figure 4 is a schematic illustration of the first disc cutter and the second disc cutter of the present invention engaged with each other.

Fig. 5 is a schematic view of the feeding of tobacco sheet into the cutting device of the present invention.

Fig. 6 is a schematic view of a tobacco sheet cut into a plurality of tobacco rods in accordance with the present invention.

Fig. 7 is a schematic cross-sectional view of a first air deflector block in an embodiment of the present invention.

Fig. 8 is a schematic view of a first air deflector of the present invention interposed between a second disc cutter and a corresponding first annular cutter slot.

Fig. 9 is a schematic cross-sectional view of a second air deflector block in an embodiment of the present invention.

Fig. 10 is a schematic view of a second air guiding block of the present invention interposed between a first disc cutter and a corresponding second annular cutter groove.

Fig. 11 is a schematic view of a motion trajectory of a tobacco sheet cut into a rod without a support assembly.

Fig. 12 is a schematic view of a cutting device cutting a tobacco sheet when a first air guide block is disposed between a second disc cutter and a corresponding first annular cutter slot.

Fig. 13 is a schematic diagram of a motion track of a tobacco sheet cut into a tobacco rod when a first air guide block is arranged between a second disc cutter and a corresponding first annular cutter groove.

Figure 14 is a schematic view of a second disc cutter of the present invention cutting tobacco sheets.

Fig. 15 is a schematic view of a cutting device cutting a tobacco sheet when a second air guide block is disposed between a first disc cutter and a corresponding second annular cutter slot.

Figure 16 is a schematic view of a first disc cutter of the present invention cutting tobacco sheets.

Fig. 17 is a schematic structural view of the crimping unit of the present invention.

FIG. 18 is a schematic view of the structure of the feeding unit of the present invention.

Fig. 19 is a schematic view of the gap formed between the outer circumference of the first pull roll and the outer circumference of the second pull roll of the present invention.

Fig. 20 is a schematic cross-sectional view of a converging funnel of the present invention.

Fig. 21 is a schematic view of the structure of the first air jet device of the present invention.

Fig. 22 is a schematic structural view of a second air jet device of the present invention.

Fig. 23 is a schematic structural view of the cleaning unit of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

It should be noted that "upper", "lower", "left", "right", "front", "rear", and the like are used in the present invention only to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

As shown in fig. 1, a schematic structural diagram of a device for manufacturing a heating type cigarette rod according to an embodiment of the present invention is provided, which is used for processing and feeding a heating non-combustible type cigarette rod.

In conventional cigarettes, short cut tobacco blends, which are obtained by mixing cut tobacco leaves, cut stems and the like in proportion, are generally called cut tobacco, and the cut tobacco is irregularly filled in forming paper to form a cigarette product. In order to distinguish short cut tobacco from conventional cigarettes, continuous cut tobacco made from rolled reconstituted tobacco is hereinafter referred to as tobacco rod.

The invention expands the low-strength rolled reconstituted tobacco into tobacco sheets P, cuts the tobacco sheets P into tobacco rods P ' (shown in figure 6), and conveys the cut tobacco rods P ' to a downstream process, and pushes the tobacco rods P ' into round strips of tobacco base rods to form the tobacco base rods by the downstream process. The present invention is directed to cutting the tobacco sheet P and conveying the tobacco rod P ', and the procedure of pushing the downstream tobacco rod P' into the circular rod of the tobacco base rod is processed according to the prior art, which will not be described in detail in the following embodiments of the present invention.

According to an embodiment of the present invention, a manufacturing apparatus of a heating type cigarette rod includes an unreeling unit 1, a crimping unit 4, a cutting device 2, and a feeding unit 3, which are sequentially arranged in a flow direction, and a cleaning unit 5 arranged below the cutting device 2.

In the embodiment of the present invention, the flow direction refers to the direction in which the tobacco sheet P is conveyed, i.e., the direction of the process flow. In this embodiment, the flow direction is right to left as shown in fig. 1, and in some embodiments, the flow direction may be left to right, which is specifically set according to the actual processing situation.

The low-strength rolled reconstituted tobacco is unfolded into tobacco sheets P through an unreeling unit 1, enters a crimping unit 4 for limiting twisting movement of the tobacco sheets P in the transverse direction, is cut into a plurality of tobacco strips P' in a flat mode after passing through a cutting device 2, is subjected to efficient online automatic cleaning treatment by a cleaning unit 5, and is conveyed to downstream equipment after being gathered at the tail ends after being cut by a feeding unit 3.

The unreeling unit 1 of the present invention, as shown in fig. 2, is configured to unreel rolled reconstituted tobacco into a tobacco sheet P and to provide the unreeled tobacco sheet P with a constant tension, according to an embodiment of the present invention.

In the embodiment of the invention, the unreeling unit 1 comprises two reels 101, and the two reels 101 are respectively wound with the rolled reconstituted tobacco. According to the embodiment of the invention, when the rolled reconstituted tobacco on one winding drum 101 is completely unfolded (or nearly completely unfolded), the rolled reconstituted tobacco on the other winding drum 101 is unfolded and spliced with the rolled reconstituted tobacco, so that the unfolded tobacco sheet P is continuously processed in the downstream process, and the online splicing and continuous supply of the tobacco sheet P are realized through the circular switching of the rolled reconstituted tobacco on the two winding drums 101.

In some embodiments, only one drum may be provided, and the rolled reconstituted tobacco on the drum 101 may be provided according to actual production scale.

According to an embodiment of the invention, the unreeling unit 1 further comprises a power machine 102, a rotation shaft 103, a connecting device 104 and a guiding roller 105.

The rolled reconstituted tobacco on the winding drum 101 is wound on a rotating shaft 103, the rotating shaft 103 is connected with a power machine 102, the power machine 102 synchronously tracks the production speed of equipment, and the rotating shaft 103 is driven to rotate in a self-adaptive mode, so that the rolled reconstituted tobacco on the winding drum 101 is unwound, and the rolled reconstituted tobacco on the winding drum 101 is unwound into tobacco sheets P.

In the embodiment of the present invention, the connecting means 104 splice together the two rolled-up tobacco sheets P unwound from the reels 101, are guided by the guide rollers 105 and then transferred to the curling unit 4, so that the unwound tobacco sheets P have a constant tension.

According to the present invention, the curling unit 4 is used for corrugating the unfolded tobacco sheet P in the transverse direction. 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, as shown in fig. 2.

As shown in fig. 1, the crimping unit 4 is a roll-shaped structure, which is arranged in the lateral direction. A plurality of annular projections 401 are provided on the outer circumference of the crimping unit 4 as shown in fig. 17. The plurality of annular protrusions 401 form a corrugated surface. When the tobacco sheet P is wrapped around the curling unit 4, the corrugated surface formed by the plurality of annular protrusions 401 causes the tobacco sheet P to be corrugated in the lateral direction, thereby restricting the twisting movement of the tobacco sheet P in the lateral direction.

The plurality of annular protrusions 401 provided on the outer circumference of the curling unit 4 form a corrugated surface, and are transferred to the tobacco sheet P, so that the tobacco sheet P is slightly curled in the lateral direction to generate a corrugated curve. The tobacco sheet P is subjected to a corrugation bending to cooperate with the corrugation surface of the crimping unit 4 for securing the tobacco sheet P in the transverse direction. By selecting certain parameters of the corrugated bending of the tobacco sheet P along the transverse direction, expected transverse resistance can be locally generated by the curling unit 4 when the tobacco sheet P transversely moves, when the tobacco sheet P is cut by the cutting device 2 in a reactive force mode, transverse tension deviation of the tobacco sheet P caused by inconsistent cutting resistance is counteracted by each cutting point, and irregular local wrinkles of the tobacco sheet P in a cutting area are eliminated, so that the reliability of cutting the tobacco sheet P by the cutting device 2 is improved.

The cutting device according to the present invention is schematically shown in fig. 3, and the first disc cutter and the second disc cutter according to the present invention are schematically shown in fig. 4, and according to an embodiment of the present invention, the cutting device 2 is used for cutting tobacco leaves P into a plurality of tobacco rods P' in the longitudinal direction.

The cutting device 2 comprises a knife holder 201, a drive motor 210, a first knife roll 202 and a second knife roll 203 arranged in a transverse direction. The first knife roller 202 and the second knife roller 203 are arranged on the knife rest 201, and the driving motor 210 drives the first knife roller 202 and the second knife roller 203 to synchronously track the running speed of the equipment to rotate in opposite directions. In one embodiment, the drive motor 210 drives the first knife roll 202 and the second knife roll 203 to rotate in opposite directions through a gear transmission.

The first cutter roller 202 is provided with a plurality of first disc cutters 204 which are alternately arranged, the second cutter roller 203 is provided with a plurality of second disc cutters 206 which are alternately arranged, the plurality of first disc cutters 204 are meshed with the plurality of second disc cutters 206, the tobacco leaves P conveyed to the cutting device 2 are longitudinally cut into a plurality of tobacco rods P ', and the cut tobacco rods P' are driven to be conveyed along the flow direction.

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

The plurality of first disc cutters 204 are embedded into the plurality of second annular cutter grooves 207, and the plurality of second disc cutters 206 are embedded into the plurality of first annular cutter grooves 205, so that the plurality of first disc cutters 204 are engaged with the plurality of second disc cutters 206.

The tobacco sheet P enters the cutting region (engagement region) of the first and second disc cutters 204 and 206, and the starting point of the cutting region between the first and second disc cutters 204 and 206 is clamped and fixed. The outer circumferential surface of the first disc cutter 204 gradually extrudes the tobacco sheet P into the second annular cutter groove 207, and at the same time, the outer circumferential surface of the second disc cutter 206 gradually extrudes the tobacco sheet P into the first annular cutter groove 205, so that the tobacco sheet P is torn between the first cutting surface 208 and the adjacent second cutting surface 209 to realize cutting, and the tobacco sheet of the present invention shown in fig. 5 is fed into the cutting device, and the tobacco sheet of the present invention shown in fig. 6 is cut into a plurality of tobacco strips.

In some embodiments, the distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s=0 to 0.08mm. The starting point of each cutting area is the tobacco sheet P clamped and fixed, and the tobacco sheet 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, so that the cutting is realized. The distance between the first cutting surface 208 and the adjacent second cutting surface 209 is s=0-0.08 mm, and when the tobacco leaf sheet P made of the low-strength flexible material is cut under the clearance, the cutting force is minimum, and the cutting quality of the obtained tobacco rod P' is better.

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 200 is configured to: in the cutting areas of the first and second disc cutters 204 and 206, the plurality of cut tobacco rods P' are alternately wrapped around the outer circumferential surface of the first disc cutter 204 and the outer circumferential surface of the second disc cutter 206.

Specifically, the support assembly 211 includes a plurality of first air guiding blocks 2111 and a plurality of second air guiding blocks 2112, wherein the second air guiding blocks 2112 are disposed between the first disk cutter 204 and the corresponding second annular cutter slot 207, and the first air guiding blocks 2111 are disposed between the second disk cutter 206 and the corresponding first annular cutter slot 205. In some embodiments, the plurality of first air guiding blocks 2111 and the plurality of second air guiding blocks 2112 are secured to the blade holder 201 by connectors (not shown).

As shown in fig. 7, a schematic cross-sectional view of a first air guiding block according to an embodiment of the present invention is shown in fig. 8, wherein the first air guiding block is disposed between a second disc cutter and a corresponding first annular cutter groove, the first air guiding block 2111 includes a first air inlet hole 2113 and a first air outlet hole 2113', and the first air guiding block 2111 is provided with a first air blowing groove 2114.

The first air-blowing groove 2114 faces the second disk cutter 206 at the cutting areas of the first disk cutter 204 and the second disk cutter 206.

As shown in fig. 9, a schematic cross-sectional view of a second air guiding block according to an embodiment of the present invention is shown in fig. 10, wherein the second air guiding block according to the present invention is disposed between a first disc cutter and a corresponding second annular cutter groove, the second air guiding block 2112 includes a second air inlet hole 2115 and a second air outlet hole 2115', and the second air guiding block 2112 is provided with a second air blowing groove 2116.

The second air-blowing groove 2116 faces the first disc cutter 204 at the cutting area of the first disc cutter 204 and the second disc cutter 206.

As shown in fig. 11, when the support component is not arranged, the tobacco sheet is cut into a motion track schematic diagram of a tobacco rod, and when the support component 211 is not arranged, the tobacco sheet P is fed from a feeding point O ₁ Feeding, cutting the tobacco rod P' from the leading-out point O ₂ And (5) exporting. 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' is at the leading-out point O ₂ Upwardly offset from the center of rotation O of the second disc cutter 206, the linear velocity of the cut tobacco rod P' is varied.

Similarly, when 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 leading-out point, and the linear speed of the cut tobacco rod P' changes.

In order to solve the problem that the linear velocity of the cut tobacco rod P' changes, the invention is provided with a supporting component 211 between the first knife roller 202 and the second knife roller 203.

As shown in fig. 12, when a first air guide block is arranged between the second disc cutter and the corresponding first annular cutter groove, a schematic diagram of cutting tobacco sheets by the cutting device is shown, as shown in fig. 13, when a first air guide block is arranged between the second disc cutter and the corresponding first annular cutter groove, a schematic diagram of cutting tobacco sheets into tobacco strips is shown, and as shown in fig. 14, a schematic diagram of cutting tobacco sheets by the second disc cutter is shown, wherein the tobacco sheets P are fed from a feeding point O ₁ Feeding, when the second disc cutter 206 is pressed into the first annular cutter groove 205 to cut the tobacco sheets P, the first air inlet hole 2113 of the first air guiding block 2111 is fed with compressed air, and the cutting areas of the first disc cutter 204 and the second disc cutter 206 are pressedThe compressed air is blown downward to the tobacco rod P 'by the first blowing groove 2114 to press the tobacco rod P'.

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

The first blowing groove 2114 blows the tobacco rod P ' downward to press the tobacco rod P ' in the cutting region of the first and second disk cutters 204 and 206, and the compressed air blows the tobacco rod P ' downward to press the tobacco rod P ' in the discharge region, so that the cut plurality of tobacco rods P ' are wrapped around the outer circumferential surface of the second disk cutter 206 in the cutting region of the first and second disk cutters 204 and 206.

From the feeding point O ₁ To the deriving point O ₂ The second disc cutter 206 is wrapped around the outer circumference of the rod P' at the feed point O ₁ To the deriving point O ₂ The cutting area between the points is in synchronous rotation against the outer circumference of the second disc cutter 206, and the cut tobacco rod P' is at the leading-out point O ₂ The distance from the rotation center O of the second disc cutter 206 is unchanged. According to the formula v=2pi Rn, the rotation speed n and the radius R are unchanged, the linear speed is also unchanged, and the first air guiding block 2111 is very beneficial to stably conveying the cigarette rod P'.

Similarly, as shown in fig. 15, when a second air guiding block is disposed between the first disc cutter and the corresponding second annular cutter slot, a schematic view of cutting the tobacco sheet by the cutting device is shown in fig. 16, and when the first disc cutter 204 is pressed into the second annular cutter slot 207 to cut the tobacco sheet P, compressed air is input into the second air inlet hole 2115 of the second air guiding block 2112, and in the cutting area of the first disc cutter 204 and the second disc cutter 206, the compressed air is blown upward by the second blowing slot 2116 to press the tobacco rod P'.

After the first disc cutter 204 is pressed into the second annular cutter groove 207 to cut the tobacco sheets P, compressed air is blown out from the second air outlet hole 2115' of the second air guiding block 2112, and the compressed air blows upward to the tobacco rod P ' in the guiding-out area to squeeze the tobacco rod P '.

By blowing the rod P 'upward in the second blowing groove 2116 to press the rod P', compressed air is blown upward in the lead-out area to press the rod P ', so that the cut rods P' are wrapped around the outer circumferential surface of the first disc cutter 204 in the cutting areas of the first disc cutter 204 and the second disc cutter 206.

From the feeding point O ₁ To the deriving point O ₂ The tobacco rod P 'wraps the outer circumferential surface of the first disc cutter 204, and the tobacco rod P' is fed at the feeding point O ₁ To the deriving point O ₂ The cutting area between the points is closely contacted with the outer circumferential surface of the first disc cutter 204 to synchronously perform rotary motion, and the cut tobacco rod P' is positioned at the leading-out point O ₂ The distance from the rotation center of the first disc cutter 204 is unchanged. According to the formula v=2pi Rn, the rotation speed n and the radius R are unchanged, the linear speed is also unchanged, and the second air guiding block 2112 is very beneficial to stably conveying the cigarette rod P'.

In the invention, the supporting component 211 is arranged between the first knife roller 202 and the second knife roller 203, and the cut multiple tobacco rods P 'are alternately wrapped on the outer circumferential surface of the first knife roller 204 and the outer circumferential surface of the second knife roller 206 in the cutting area of the first knife roller 204 and the second knife roller 206, so that the multiple tobacco rods P' after cutting can be ensured to be more flat and in the same plane, as shown in fig. 6. The supporting component 211 is arranged between the first knife roller 202 and the second knife roller 203, so that the tobacco rods P ' are flexibly supported well, the linear speed of the tobacco rods P ' is consistent in the cutting process, the cutting size precision is effectively improved, the yarn breakage rate of the tobacco rods P ' after being cut is greatly reduced, the cutting size precision is improved, and the continuous production efficiency of equipment is improved.

In some embodiments, on the side of the tobacco sheet P that is introduced into the cutting device 2, the head of the first air guiding block 2111 and the head of the second air guiding block 2112 are offset in directions away from each other to ensure that the tobacco sheet P smoothly enters the cutting device 2 for cutting.

According to an embodiment of the present invention, there is provided a cutting method for precisely cutting a low-strength tobacco sheet, by which there is provided a cutting device 2 for precisely cutting a low-strength tobacco sheet, cutting a tobacco sheet P, comprising:

the tobacco sheet P is introduced into the cutting device 2 from the feeding point O ₁ Into the cutting area.

The second disc cutter 206 is pressed into the first annular cutter groove 205 to cut the tobacco sheet P, and the first disc cutter 204 is pressed into the second annular cutter groove 207 to cut the tobacco sheet P.

Compressed air is input into the first air inlet hole 2113 of the first air guiding block 2111, and is blown downwards to the tobacco rod P 'by the first blowing groove 2114 to squeeze the tobacco rod P' in the cutting area of the first disc cutter 204 and the second disc cutter 206,

meanwhile, the second air inlet hole 2115 of the second air guiding block 2112 inputs compressed air, and the compressed air blows upward from the second blowing groove 2116 to the tobacco rod P 'to press the tobacco rod P' at the cutting area of the first disc cutter 204 and the second disc cutter 206.

Cut tobacco rod P' is guided out from point O ₂ And lead out to a lead-out area.

Compressed air in the first air guiding block 2111 is blown out by a first air outlet hole 2113' of the first air guiding block 2111, compressed air is blown down to the tobacco rod P ' in the guiding-out area to press the tobacco rod P ',

meanwhile, the compressed air in the second air guiding block 2112 is blown out by the second air outlet hole 2115' of the second air guiding block 2112, and the compressed air blows upward to the tobacco rod P ' in the guiding-out area to press the tobacco rod P '.

Fig. 17 shows a schematic diagram of the structure of a crimping unit according to the invention, the crimping unit 4 being arranged between the unreeling unit 1 and the cutting device 2 upstream of the cutting device 2. In one embodiment, the distance A between the curling unit 4 and the axial center of the first knife roller 202 and the axial center of the second knife roller 203 is 0.5-1.5 times of the transverse width of the tobacco sheet P, and the wrapping angle beta=60-180 degrees of the tobacco sheet P on the curling unit 4 is achieved by adjusting the guide roller 105.

In a further embodiment, the distance a=50 mm to 150mm between the curling unit 4 and the axial center of the first cutter roller 202 and the axial center of the second cutter roller 203.

As shown in a schematic structure of the feeding unit of the present invention in fig. 18, a schematic structure of a gap is formed between the outer circumference of the first traction roller and the outer circumference of the second traction roller in fig. 19, a feeding unit 3 is disposed at the downstream side of the cutting unit 2, the cut tobacco rods P 'are conveyed to the feeding unit 3 in a straight manner, and the feeding unit 3 is used for drawing the plurality of tobacco rods P' to be conveyed in a straight manner along the flow direction. The feeding unit 3 extends from the point of exit of the rod P' of the cutting device 2 all the way to the inlet end of the downstream equipment.

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

The pulling roll pair includes a first pulling roll 302 and a second pulling roll 303. The surface of the first pulling roll 302 is provided with at least one bar-shaped groove 3021 along the axial direction of the first pulling roll 302. The gap C between the outer circumference of the first pulling roll 302 and the outer circumference of the second pulling roll 303 is smaller than the thickness of the tobacco rod P ', and when the first pulling roll 302 rotates until the strip-shaped groove 3021 is opposite to the second pulling roll 303, the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second pulling roll 303 is larger than the thickness of the tobacco rod P'.

The mounting axis of the first pulling roll 302 is parallel to the first knife roll 202 axis and the mounting axis of the second pulling roll 303 is parallel to the second knife roll 203 axis. The gap C between the first pulling roll 302 and the second pulling roll 303 is slightly smaller than the thickness of the tobacco rod P ', and when the tobacco rod P ' enters the gap between the first pulling roll 302 and the second pulling roll 303, a certain pressure is formed on the tobacco rod P '. The motor 304 drives the first pulling roll 302 and the second pulling roll 303 to rotate in opposite directions, and pulls the tobacco rod P' to advance by the action of the clamping force in accordance with the production speed of the apparatus.

When the bar groove 3021 of the first pulling roll 302 rotates to the pulling position of the tobacco rod P '(the bar groove 3021 is opposite to the second pulling roll 303), the gap C between the outer circumference of the first pulling roll 302 and the outer circumference of the second pulling roll 303 increases, and becomes the gap C1 (greater than the thickness of the tobacco rod P') between the edge of the bar groove 3021 and the outer circumference of the second pulling roll 303, at this time, the first pulling roll 302 and the second pulling roll 303 have no pressure on the tobacco rod P ', and the tobacco rod P' can adaptively slide back and forth between the first pulling roll 302 and the second pulling roll 303.

According to the embodiment of the invention, the first plane groove plate 305 and the second plane groove plate 306 are arranged flatly on two sides of the traction roller pair, the bottom surfaces of the first plane groove plate 305 and the second plane groove plate 306 are respectively provided with a plurality of dust collection holes, the converging funnel 301 is arranged on the downstream side of the second plane groove plate 306, and the first plane groove plate 305 extends between the first knife roller 202 and the second knife roller 203. As shown in the schematic cross-section of the converging funnel of the present invention in fig. 20, the converging funnel 301 has a venturi structure inside, the converging funnel 301 is provided with a nozzle 308, and compressed air is introduced into the converging funnel 301 through the nozzle 308 in the venturi structure inside.

The inlet end of the converging funnel 301 is square to facilitate entry of the rods P'. The outlet end of the converging funnel 301 tapers to a circular shape for gathering the rods P'. After gathering the plurality of rods P', they are transported by the outlet end of the converging funnel 301 to downstream equipment.

Specifically, the venturi tube structure inside the converging funnel 301 is continuously supplied with air through the nozzle 308, so that the negative pressure is generated at the outlet end of the converging funnel 301, and under the action of the pressure difference, the converging funnel 301 continuously sucks the tobacco rods P 'conveyed by the first traction roller 302 and the second traction roller 303, and gathers the tobacco rods P'. After gathering the plurality of rods P', they are transported by the outlet end of the converging funnel 301 to downstream equipment.

It is advantageous to pre-gather the flat rods P' prior to shaping the tobacco base rod. For example, the pre-gathering can enable the tobacco rod P ' to be pushed into the round rod of the tobacco base rod to obtain smaller forming resistance, and further enable the tobacco rods P ' on two sides to be gathered towards the central axis of the round rod of the tobacco base rod at a slow transverse moving speed, so that the tobacco rods P ' can be better and straightly distributed in the round rod of the tobacco base rod.

In some embodiments, the diameter of the venturi structure at the location of the smallest cross section inside the converging funnel 301 is 1.5-3 times the diameter of the circular strip of tobacco-based rod.

The soft and weak tobacco rods P 'are difficult to be led out from the first annular knife grooves 205 and the second annular knife grooves 207 of the cutting device 2, the pretightening force applied to the tobacco rods P' can be stably maintained in the running process of the device by utilizing the first traction roller 302 and the second traction roller 303, the pretightening force can ensure the flat and orderly conveying of the tobacco rods P ', the subsequent parallel distribution of the tobacco rods P' in the axial direction after the transverse gathering is facilitated, the flat posture of the tobacco rods P 'is kept unchanged, and the smooth leading-out of the tobacco rods P' from the cutting device 2 can be effectively realized.

However, in objective terms, the first pulling roll 302 and the second pulling roll 303, and the plurality of first annular sipes 205 and the plurality of second annular sipes 207 cannot completely achieve line speed consistency due to manufacturing and control accuracy. Therefore, when the first traction roller 302 and the second traction roller 303 and the first annular knife grooves 205 and the second annular knife grooves 207 are not in sliding transmission, accumulated errors are generated, and when the errors exceed a certain value, the cigarette sticks P' are broken, the rollers are entangled, the unordered arrangement is caused, and the equipment efficiency and the production quality of finished products are seriously limited.

According to the invention, at least one strip-shaped groove 3021 is formed in the surface of the first traction roller 302 along the axial direction of the first traction roller 302, a 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 a cigarette strip P ', and when the first traction roller 302 rotates until the strip-shaped groove 3021 is opposite to the second traction roller 303, the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second traction roller 303 is larger than the thickness of the cigarette strip P'.

The converging funnel 301 is arranged on the downstream side of the second plane groove plate 306, the venturi tube structure in the converging funnel 301 continuously provides compressed air through the nozzle 308, so that negative pressure is generated at the outlet end of the converging funnel 301, flexible traction is continuously carried out on the cigarette rods P ' in the operation process under the action of pressure difference, and further when the strip-shaped groove 3021 of the first traction roller 302 rotates to a traction position of the cigarette rods P ' (the strip-shaped groove 3021 is opposite to the second traction roller 303), the cigarette rods P ' can slide back and forth in a self-adaptive mode between the first traction roller 302 and the second traction roller 303, and therefore accumulated errors in conveying are eliminated.

According to the invention, through the adjustment of the flexible traction force of the tobacco rods P 'in the convergence funnel 301, when the tobacco rods P' pass through a gap C1 between the strip-shaped groove 3021 of the first traction roller 302 and the outer circumference of the second traction roller 303, the tobacco rods P 'can adaptively slide back and forth under the traction of negative pressure, so that the accumulated error of conveying is eliminated, and breakage, winding and disordered arrangement of the tobacco rods P' are avoided.

In some embodiments, a buffer is provided between the outlet end of the convergence funnel 301 and the downstream equipment, so that the tobacco rod P 'is stably conveyed to the downstream equipment, for example, a certain buffer amount is formed by speed control, and the buffer amount can be used for compensating the conveying error of the tobacco rod P'.

According to an embodiment of the present invention, when a plurality of rods P 'are transferred to the feeding unit 3, the plurality of rods P' are transferred over the first planar groove plate 305 and the second planar groove plate 306. In some embodiments, the plurality of tobacco rods P' are spaced from the upper surfaces of the first planar fluted plate 305 and the second planar fluted plate 306 by a distance of 0 to 1mm.

In a further embodiment, the distance between the plurality of tobacco rods P' and the upper surfaces of the first planar slot plate 305 and the second planar slot plate 306 is adjustable.

In a further embodiment, the tobacco rod P' may be in light contact with the upper surfaces of the first planar slot plate 305 and the second planar slot plate 306 when tensioned.

Because the tobacco rod P ' has the characteristics of low strength, high flexibility, easy breakage and the like, it is necessary to decide that a certain support is taken on the tobacco rod P ' to assist the conveying thereof, and the present invention takes a certain support on the tobacco rod P ' through the first planar groove plate 305 and the second planar groove plate 306 to assist the conveying thereof.

Since the transfer of the rods P 'requires slight tension, however, the slight tension of the rods P' is essentially jittery at high speed transfer, which inevitably leads to breakage of the individual rods P ', the jittery of the rods P' can be effectively suppressed by the first planar groove plate 305 and the second planar groove plate 306.

In addition, in objective terms, the first traction roller 302 and the second traction roller 303, in correspondence with the fact that the line speed of the plurality of first annular sipes 205 and the plurality of second annular sipes 207 cannot be completely achieved due to the precision of manufacture and control, breakage of the rods P ' between the pair of traction roller sets and the cutting means is not completely avoided, and the present invention supports the rods P ' by means of the first plane groove plate 305 and the second plane groove plate 306, the front section of the broken rods P ' remaining continuously conveyed forward in the flexible traction of the converging funnel 301. The rear section of the broken cigarette rod P ' is pulled to continue to be conveyed forwards by friction force generated by the cigarette rod P ' in normal surrounding conveying, when the head of the rear section of the broken cigarette rod P ' passes through the first traction roller 302 and the second traction roller 303, a clamping force is built again to realize flat and orderly conveying, the broken cigarette rod P ' can be maintained on a preset path of conveying the cigarette rod P ', and irreversible loss of materials is avoided.

According to the embodiment of the present invention, the bottom surfaces of the first planar groove plate 305 and the second planar groove plate 306 are respectively provided with a plurality of dust collection holes, and the plurality of dust collection holes are connected with a negative pressure fan 507 (described below) through a negative pressure suction nozzle 307, so that wastes (dust, tobacco dust, etc.) on the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 are timely sucked away.

In one embodiment, the diameter of the plurality of dust collection holes formed in the bottom surfaces of the first planar groove plate 305 and the second planar groove plate 306 is less than 2mm.

The invention performs cleaning treatment in the process of cutting tobacco leaves P and conveying tobacco rods P', as shown in a structural schematic diagram of a first air jet device of the invention shown in FIG. 21, a structural schematic diagram of a second air jet device of the invention shown in FIG. 22, and a structural schematic diagram of a cleaning unit of the invention shown in FIG. 23, the invention provides a manufacturing device of heating type cigarette rods, which further comprises a cleaning unit 5, and the cleaning unit 5 is arranged below the cutting device 2.

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 tank 508, a negative pressure delivery conduit 505, a filter 506, and a negative pressure fan 507.

The first air jet device 501A is mounted on the cutter frame 201, the first comb-shaped scraper 502A is mounted 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 into 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 viscous waste (dust, tobacco dust and the like) 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.

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 doctor blade 502A, and the first air inlet 501A1 of the first air jet device 501A introduces high-speed air flow to clean the first annular cutter groove 205, and remove waste (dust, tobacco dust, etc.) in the first annular cutter groove 205.

Similarly, a second air jet device 501B is mounted on the knife holder 201, a second comb-shaped scraper 502B is mounted on the second air jet device 501B, the second comb-shaped scraper 502B is located at 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 second disc-shaped cutters 206 which are alternately arranged, the second comb-shaped scraper 502B scrapes off viscous wastes (dust, tobacco dust, etc.) in the first annular knife grooves 205, and the second air jet device 501B cleans the second annular knife grooves 207 by high-speed air flow in combination with the second comb-shaped scraper 502B.

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 doctor blade 502B, and 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 waste (dust, tobacco dust, etc.) in the second annular cutter groove 207.

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 at the other sides of the first knife roll 202 and the second knife roll 203, the first plasma nozzle 504A faces the first annular knife slot 205, the second plasma nozzle 504B faces the second annular knife slot 207, and the first plasma nozzle 504A and the second plasma nozzle 504B are respectively mounted on the knife rest 201.

The plasma generator 503 introduces plasma gas containing active atomic oxygen into the first annular sipe 205 and the second annular sipe 207 through the first plasma nozzle 504A and the second plasma nozzle 504B, respectively, and deeply cleans the portions which cannot be treated by the first air jet device 501A, the second air jet device 501B, the first comb-shaped blade 502A, and the second comb-shaped blade 502B.

A collection trough 509 is located below the second disc cutter 206 and a collection box 508 is located below the collection trough 509 and is in communication with the collection trough 509 by a conduit. The negative pressure delivery pipe 505 communicates with the collection tank 508 and the negative pressure fan 507, and a filter 506 is provided on the negative pressure delivery pipe 505.

The waste (dust, tobacco dust, etc.) falling after the first annular knife groove 205 is cleaned falls onto the first plane groove plate 305, the waste (dust, tobacco dust, etc.) falling after the second annular knife groove 207 is cleaned falls into the collecting groove 509, the negative pressure fan 507 pumps air, negative pressure is generated in the collecting box 508, the waste (dust, tobacco dust, etc.) enters the collecting box 508 from the collecting groove 509 and the bottom of the first plane groove plate 305, and meanwhile, a filter 506 is arranged on the negative pressure conveying pipeline 505 to filter the waste (dust, tobacco dust, etc.) in the air in the pumping process, so that the waste is prevented from being pumped out of the collecting box 508.

The negative pressure fan 507 is connected with the negative pressure suction nozzle 307, and the negative pressure fan 507 is used for exhausting air to timely suck the waste (dust, tobacco dust and the like) on the upper surfaces of the first plane groove plate 305 and the second plane groove plate 306.

According to an embodiment of the present invention, there is provided a method for manufacturing a heating type cigarette bar, which includes the steps of:

1) The rolled reconstituted tobacco is unrolled into a tobacco sheet P, and the unrolled tobacco sheet P is given a constant tension.

The rolled reconstituted tobacco on the drum 101 is wound on a rotating shaft 103, the rotating shaft 103 is connected with a power machine 102, the power machine 102 synchronously tracks the production speed of equipment, the rotating shaft 103 is driven to rotate in a self-adaptive mode, so that the rolled reconstituted tobacco on the drum 101 is unwound, the rolled reconstituted tobacco on the drum 101 is unwound into tobacco sheets P, the tobacco sheets P are guided by a guide roller 105 and then conveyed to a curling unit 4, and the unwound tobacco sheets P have constant tension.

2) The unfolded tobacco sheet P is transferred to the curling unit 4, and the curling unit 4 generates a corrugated curve in the lateral direction by the corrugated surface formed by the annular protrusions.

3) The tobacco sheet P is conveyed to a cutting device 2, and the cutting device 2 cuts the tobacco sheet P into a plurality of tobacco rods P' in the longitudinal direction.

In the cutting area of the first and second disc cutters 204 and 206 of the cutting device 2, the cut plurality of rods P' alternately wrap the outer circumferential surface of the first disc cutter 204 and the outer circumferential surface of the second disc cutter 206.

In the process of cutting the tobacco sheet P into a plurality of tobacco rods P' in the longitudinal direction by the cutting device 2, the cleaning unit 5 cleans the cutting device 2, comprising the steps of:

31 Primary cleaning).

The first comb-shaped blade 502A and the second comb-shaped blade 502B of the cleaning unit 5 clean the first annular sipe 205 and the second annular sipe 207, respectively, in combination with the high-speed air flow introduced by the first air jet device 501A and the second air jet device 501B.

When the first knife roll 202 and the second knife roll 203 rotate circumferentially, waste (dust, tobacco dust and the like) adhered to the first annular knife groove 205 and the second annular knife groove 207 respectively generate mechanical extrusion with the first comb-shaped scraper 502A and the second comb-shaped scraper 502B which are static, so that chip removal is realized, and the scraped waste (dust, tobacco dust and the like) is removed from the first annular knife groove 205 and the second annular knife groove 207 by combining high-speed air flow introduced by the first air jet device 501A and the second air jet device 501B.

32 Cleaning again.

The plasma generator 503 of the cleaning unit 5 generates plasma, and introduces the plasma into the first annular sipe 205 and the second annular sipe 207 from the first plasma nozzle 504A and the second plasma nozzle 504B, respectively, and further deep-cleans the first annular sipe 205 and the second annular sipe 207.

The active atomic oxygen in the plasma can rapidly oxidize organic matters such as pectin, propylene glycol, glycerol, perfume and the like which are main sticky matters in reconstituted tobacco into volatile gases or carry out modification treatment, so that the viscosity of tobacco dust and dust in the first annular knife groove 205 and the second annular knife groove 207 is greatly reduced, and the first comb-shaped scraper 502A, the first air jet device 501A and the second comb-shaped scraper 502B and the second air jet device 501B in the first annular knife groove 205 are prevented from condensing at the positions where the waste (dust, tobacco dust and the like) cannot be cleaned and the waste (dust, tobacco dust and the like) is automatically discharged under the action of gravity.

33 Waste collection.

The negative pressure fan 507 of the cleaning unit 5 generates negative pressure to collect the waste falling into the collection tank 509 and the bottom of the first planar recess plate 305 into the collection tank 508.

4) The plurality of tobacco rods P 'are transferred to the feeding unit 3, compressed air is applied in the convergence hopper 301 of the feeding unit 3, and the plurality of tobacco rods P' are pulled to be transferred straight in the flow direction by the first pulling roller 302 and the second pulling roller 303 of the feeding unit 3.

During the process of the plurality of tobacco rods P 'being conveyed straight along the flow direction by the feeding unit 3, compressed air is applied in the converging funnel 301, and the plurality of tobacco rods P' are drawn by the first drawing roller 302 and the second drawing roller 303 of the feeding unit 3. The surface of the first traction roller 302 is provided with at least one strip-shaped groove 3021 along the axial direction of the first traction roller 302, a 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 until the strip-shaped groove 3021 is opposite to the second traction roller 303, the gap C1 between the edge of the strip-shaped groove 3021 and the outer circumference of the second traction roller 303 is larger than the thickness of the cigarette rod P'. When the tobacco rod P 'passes through the clearance C1 between the strip groove 3021 of the first pulling roller 302 and the outer circumference of the second pulling roller 303, the tobacco rod P' can slide back and forth adaptively under the negative pressure pulling, and the accumulated error of the conveying is eliminated.

In the process of the feeding unit 3 being conveyed straight in the flow direction, the negative pressure fan 507 sucks air, and the waste (dust, tobacco dust, etc.) on the upper surfaces of the first planar groove plate 305 and the second planar groove plate 306 is sucked away in time through the negative pressure suction nozzle 307.

The following points need to be described:

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

(2) In the drawings for describing embodiments of the present invention, the thickness of layers or regions is exaggerated or reduced for clarity, i.e., the drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.

(3) The embodiments of the invention and the features of the embodiments can be combined with each other to give new embodiments without conflict.

The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.

Claims

1. A cutting device for precision cutting of low-strength tobacco leaves, characterized in that the cutting device is used for cutting the tobacco leaves into a plurality of tobacco rods along a longitudinal direction;

2. The cutting device of claim 1, wherein the support assembly comprises a plurality of first air guide blocks and a plurality of second air guide blocks;

3. The cutting device of claim 2, wherein the first air guide block comprises a first air inlet hole and a first air outlet hole, and the first air guide block is provided with a first air blowing groove;

4. A cutting device according to claim 3, wherein the head of the first air deflector and the head of the second air deflector are offset in a direction away from each other on the side of the tobacco sheet leading into the cutting device.

5. The cutting device of claim 1, further comprising a blade carrier and a drive motor,

6. The cutting device of claim 1, wherein the first disc cutter forms a first cutting surface on both sides and the second disc cutter forms a second cutting surface on both sides.

7. The cutting device of claim 6, wherein a distance between the first cutting surface and the adjacent second cutting surface is 0-0.08 mm.

8. A cutting method for precision cutting of low-strength tobacco leaves, characterized in that the method cuts tobacco leaves with the cutting device according to any one of claims 1 to 7, comprising: