Stable suction resistance device for recombining tobacco leaf filter stick through dry method and preparation method of stable suction resistance device

Abstract

The invention belongs to the technical related field of special filter stick equipment, and particularly relates to a stable suction resistance device of a dry recombined tobacco filter stick and a preparation method.The stable suction resistance device sequentially comprises a primary limiting groove, a semicircular groove, a wide W-shaped arc-shaped groove, a narrow W-shaped arc-shaped groove, a tightening guide circular groove and a conical funnel barrel in the filter stick production sequence direction; the six modules are connected to a fixed round support through a round optical shaft and a cross clamp, and the collecting centers of collecting cavities formed by the six modules are kept on the same axis. The guiding multi-stage gathering stable suction resistance device is additionally arranged at the front end of an existing paper filter stick forming base cigarette tongue, equipment improvement is small, cost is low, and production is easy to achieve; compared with an existing horn axial natural curling or folding bundling forming equipment process, the dry-method recombined tobacco leaf filter stick using the guiding multi-stage bundling stable suction resistance device and the preparation method is uniform in tow distribution, and the suction resistance stability is obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field related to special filter rod equipment, and specifically relates to a stabilizing suction resistance device and a preparation method of a dry-process reconstituted tobacco filter rod. Background Art

[0002] Cigarette filter rods are the filtration system of cigarette smoke. They are the key materials for intercepting and adsorbing tar in cigarettes, and are also one of the important carriers of cigarette flavor compensation. The commonly used cigarette filter material is acetate fiber. Acetate fiber filters have good tar filtering effect, but lack the function of supplementing aroma, and are not easy to biodegrade. They will pollute the environment after being discarded. At the same time, the tar reduction of cigarettes also leads to the loss of flavor, making it difficult for low-tar cigarettes to be recognized by consumers. With the increasing concern of human beings for health and the environment, the development of low-tar and low-harm cigarettes has spawned new demands for multifunctional special filter rods and filter materials such as green environmental protection and flavor enhancement.

[0003] Reconstructed tobacco, also known as tobacco flakes, reconstituted tobacco, and homogenized tobacco, is mainly composed of tobacco dust, fragments, tobacco stems or low-grade tobacco leaves with adhesives and other additives. Its production processes mainly include rolling method, thick pulp method, papermaking method, dry method, etc. Reconstructed tobacco made from low-grade tobacco raw materials has low cost, good filling properties, and has the advantages of reducing smoke tar. Reconstructed tobacco leaves themselves contain a large amount of tobacco components. After being cut into shreds, they are filled in cigarette tobacco for burning and smoking, and can also be used as cigarette filter materials. Chinese patent CN 211672434 U discloses a tobacco flake filter rod and a composite filter rod, in which the tobacco flake filter rod has a filter made of tobacco flakes, which can not only bring a full tobacco flavor but also improve the filtering ability of smoke. Chinese patent CN112956725 B discloses a double-layer composite reconstituted tobacco paper filter rod, which is made by composite embossing of reconstituted tobacco leaf rolls and molded paper coated rolls and rolled by a filter rod forming machine.

[0004] Dry-process reconstituted tobacco is a reconstituted tobacco prepared by airflow forming green process technology. Compared with reconstituted tobacco by papermaking, thick pulp, rolling and other methods, it has low density, loose and porous structure, high aroma ratio, and good smoke filtering material advantages. It can be used as a special functional filter rod material. Chinese patent CN 206354420 U discloses a dry-process reconstituted tobacco filter rod, the filter material of which is composed of axial curling or folding of dry-process reconstituted tobacco, and can also be loaded with tobacco humectants / flavors and spices to further moisturize or enhance the aroma. Chinese patent CN 206354422 U discloses a functional harm reduction filter rod comprising a dry-process reconstituted tobacco and a molecular imprinting film rolling composite sheet. The dry-process reconstituted tobacco improves the cigarette aroma and the molecular imprinting film reduces the harm in a targeted manner, thereby achieving cigarette smoking safety and flavor enhancement.

[0005] At present, the paper filter rod forming machine is used in the production of recombinant tobacco leaf filter rods. After the unrolled recombinant tobacco leaves are rolled and cut into shreds, they are axially gathered and curled or folded by a conical funnel wire guide and enter the smoke chamber for wrapping and forming. Since the recombinant tobacco leaf strands are dragged and run during the rolling process, they are naturally gathered and formed by the conical funnel wire guide. The distribution of the produced filter rod strands is uncontrollable and uneven, and there is a defect of large fluctuations in suction resistance, resulting in unstable suction resistance quality of the filter rod and waste of raw and auxiliary materials. Summary of the invention

[0006] The object of the present invention is to provide a device and a preparation method for stabilizing the suction resistance of a dry reconstituted tobacco filter rod, which can process dry reconstituted tobacco so that the manufactured dry reconstituted tobacco filter rod can be converged, controllably and evenly distributed, thereby improving the stability of the filter rod's suction resistance and solving the technical problems of large fluctuations in the suction resistance and unstable quality of the dry reconstituted tobacco filter rod.

[0007] To achieve the above objectives, this application is implemented through the following technical solutions:

[0008] A device for stabilizing suction resistance of a dry reconstituted tobacco filter rod comprises six modules, namely, a primary limiting groove, a semicircular groove, a wide W-shaped arc groove, a narrow W-shaped arc groove, a tightening guide circular groove and a conical funnel tube, along the production sequence of the filter rod. The six modules are linked to a fixed circular bracket by a circular optical axis and a cross clamp, and the convergence centers of the convergence cavities formed by the six modules are kept on the same axis.

[0009] Furthermore, the primary limit groove includes two adjustable baffles, a primary limit groove upper plate and a primary limit groove lower plate, the two adjustable baffles are arranged between the primary limit groove upper plate and the primary limit groove lower plate, and the two adjustable baffles, the primary limit groove upper plate and the primary limit groove lower plate form a filament bundle limit groove.

[0010] Furthermore, the semicircular groove includes a semicircular block and a semicircular block pressing plate, and the semicircular block pressing plate cooperates with the semicircular block to form a gap channel.

[0011] Furthermore, the wide W-arc groove comprises a wide W-arc block and a wide W-arc block pressing plate, and the wide W-arc block cooperates with the wide W-arc block pressing plate to form a gap channel.

[0012] Furthermore, the narrow W-arc groove comprises a narrow W-arc block and a narrow W-arc block pressing plate, and the narrow W-arc block cooperates with the narrow W-arc block pressing plate to form a gap channel.

[0013] Furthermore, the tightening guide circular groove is a cylinder with a raised guide strip inside, and 2-8 smooth raised limit blocks are evenly arranged on the inner surface of the rear half of the cylinder.

[0014] Furthermore, the conical funnel is a circular funnel with a set taper, and three smooth raised guide limit blocks are evenly arranged on the top of the upper semicircle near the outlet end of the funnel, and the outlet end of the conical funnel is inserted into the tongue bell mouth of the filter rod forming machine.

[0015] A method for preparing a dry reconstituted tobacco filter rod, using any of the above-mentioned devices for stabilizing suction resistance of a dry reconstituted tobacco filter rod, adopts the following steps:

[0016] S1. Raw material unwinding: dry reconstituted tobacco leaf rolls are unwinded by an unwinding machine;

[0017] S2, rolling and shredding: the dry-process reconstituted tobacco leaves unrolled in step S1 are conveyed to a shredding roller, and the dry-process reconstituted tobacco leaves are rolled and cut into shredded strips, wherein the shredded strips are completely cut and separated or partially cut and partially adhered;

[0018] S3, guided multi-stage bunching: the dry reconstituted tobacco leaf tow belt is transported to the channel of the stable suction resistance device, the sheet tow belt is positioned by the primary limiting groove, and then passes through the semicircular groove, the wide W arc groove, the narrow W arc groove, the tightening guide circular groove and the conical funnel tube in sequence to form a cylinder with uniform tow distribution;

[0019] S4, wrapping and forming: the cylindrical tow gathered in step S3 enters the filter rod forming machine through the cigarette tongue, and is wrapped with forming paper to form a round rod;

[0020] S5. Cutting: Use a filter rod cutting machine to cut the wrapped round rod into filter rods of set length.

[0021] Furthermore, in step S1, the dry reconstituted tobacco has a basis weight of 30 g / m2-160 g / m2, a thickness of 0.05 mm-0.60 mm, a width of 50 mm-160 mm, a tensile strength ≥0.3 KN / m, a tensile elongation ≥5.5%, and a bulk thickness ≥2.5 cm3 / g.

[0022] Furthermore, an online flavoring process is included between step S3 and step S4, wherein the shredded silk band passes through a flavoring box, and tobacco flavors or humectants are added according to a metered amount.

[0023] The beneficial effects of the present invention are:

[0024] 1. The recombinant tobacco filter rods prepared by the current horn tube axial natural curling or folding bundling forming equipment process have large fluctuations in suction resistance, with a coefficient of variation (CV) as high as 10%-20%. The dry-process recombinant tobacco filter rods using the above-mentioned guided multi-stage bundling and stable suction resistance device and preparation method have uniform distribution of fiber bundles and significantly improved suction resistance stability, and the coefficient of variation (CV) of suction resistance is reduced to 3%-5%.

[0025] 2. The guided multi-stage convergence and stabilizing absorption resistance device of the present invention is installed on the front end of the existing paper filter rod forming base cigarette tongue, with small equipment improvement, low cost and easy production and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation structure of the suction resistance stabilizing device of the dry-process reconstituted tobacco filter rod of the present invention.

[0027] Figure 2 This is a schematic diagram of the primary limit groove decomposition.

[0028] Figure 3 This is a schematic diagram of the decomposition of the semicircular groove.

[0029] Figure 4 This is a schematic diagram of the decomposition of the wide W arc groove.

[0030] Figure 5 This is a schematic diagram of the decomposition of the narrow W-shaped arc groove.

[0031] Figure 6 It is a schematic diagram of the decomposition of the tightening guide circular groove.

[0032] Figure 7 This is a schematic diagram of the decomposition of the conical funnel tube.

[0033] Description of reference numerals:

[0034] 1. Filter rod forming machine; 2. Mounting plate; 3. Circular optical axis; 4. Vertical circular optical axis; 5. Cross clamp; 6. Primary limit groove; 61. Primary limit groove upper plate; 62. Primary limit groove lower plate; 63. Adjustable baffle; 64. Adjusting bolt; 7. Semicircular groove; 71. Semicircular block; 72. Semicircular block pressure plate; 8. Wide W arc groove; 81. Wide W arc block; 82. Wide W arc block pressure plate; 83. Center convex arc; 9. Narrow W arc groove; 91. Narrow W arc block; 92. Narrow arc block pressure plate; 10. Compact guide circular groove; 101. Cylinder; 102. Raised limit block; 11. Conical funnel tube; 111. Circular funnel tube; 112. Raised guide limit block. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be construed as limiting the technical solution of the present invention.

[0036] See also Figures 1 to 7As shown, the present application provides a stable absorption resistance device for a dry reconstituted tobacco filter rod, which includes six modules, namely a primary limiting groove 6, a semicircular groove 7, a wide W-arc groove 8, a narrow W-arc groove 9, a tightening guide circular groove 10 and a conical funnel tube 11, along the production sequence of the filter rod. The six modules are linked to a fixed circular bracket by a circular optical axis and a cross clamp, and the convergence center of the convergence cavity formed by the six modules is maintained on the same axial line.

[0037] Specific as Figure 1 As shown, a horizontal circular optical axis 3 is installed on the mounting plate 2, and five vertical circular optical axes 4 are fixed on the circular optical axis 3 through five cross clamps 5. On the five vertical circular optical axes, extending from away from the filter rod forming machine 1 to close to the filter rod forming machine, primary limiting grooves 6, semicircular grooves 7, wide W-arc grooves 8, narrow W-arc grooves 9, and tightening guide circular grooves 10 are fixed in sequence through the cross clamps 5, and the outlet end of the conical funnel tube 11 is inserted into the filter rod forming machine tongue bell mouth.

[0038] The primary limiting groove, semicircular groove, wide W arc groove, narrow W arc groove, tightening guide circular groove and conical funnel tube of the present application are all made of stainless steel, with an inner surface roughness of 0.8. The smooth surface facilitates the smooth operation of the tow sheet during the production dragging process.

[0039] The guided multi-stage contraction device of the present application can be expanded to be used for forming medium- and thick-branch reconstituted tobacco filter rods by changing the sizes of the semicircular groove, the wide W-shaped arc groove, the narrow W-shaped arc groove, the tightened guide circular groove, and the conical funnel tube.

[0040] See also Figure 2 In the present application, the primary limit groove 6 includes two adjustable baffles 63, a primary limit groove upper plate 61 and a primary limit groove lower plate 62. The two adjustable baffles are arranged between the primary limit groove upper plate and the primary limit groove lower plate. The two adjustable baffles, the primary limit groove upper plate and the primary limit groove lower plate form a limit groove for the strand sheet. The limit groove has a groove depth of 2mm, an inner side length of 72mm-154mm, and a width of 20mm-50mm, which is used to preliminarily limit the horizontal position of the strand sheet to prevent the strand sheet from moving. Adjusting the position of the left and right block blocks can adjust the inner side length, which is convenient for matching the width size of the reconstituted tobacco leaf.

[0041] See also Figure 3In the present application, the semicircular groove 7 includes a semicircular block 71 and a semicircular block pressing plate 72, and the semicircular block pressing plate cooperates with the semicircular block to form a slit channel. The arc length of the semicircular block is 71mm-76 mm, and the channel gap is 2mm wide, which is used to perform semicircular shaping, guiding and shrinking of the silk bundle sheet. If the arc length of the semicircular block is 94mm-138 mm, and the channel gap is 2mm wide, it is used to perform semicircular shaping, guiding and shrinking of the silk bundle sheet for medium cigarettes. If the arc length of the semicircular block is 145mm-155 mm, and the channel gap is 2mm wide, it is used to perform semicircular shaping, guiding and shrinking of the silk bundle sheet for thick cigarettes.

[0042] See also Figure 4 In the present application, the wide W-arc groove 8 includes a wide W-arc block 81 and a wide W-arc block pressing plate 82, and the wide W-arc block cooperates with the wide W-arc block pressing plate to form a gap channel. The arc length of the wide W-arc block is 71mm-76mm, the gap width is 2mm, the arc profile width is 50mm, the height is 15mm, and the center convex arc radius is 10mm, which is used to perform W-arc shaping guidance pre-bending and shrinking on the semicircular silk bundle sheet. If the arc length of the wide W-arc block is 94mm-138mm, the gap width is 2mm, the arc profile width is 70mm-100mm, the height is 18mm-20mm, and the center convex arc radius is 10mm, it is used to perform W-arc shaping guidance pre-bending and shrinking on the semicircular silk bundle sheet for medium cigarettes. If the arc length of the wide W-arc block is 145mm-155mm, the gap width is 2mm, the arc profile width is 70mm-100mm, the height is 20mm-22mm, and the center convex arc radius is 10mm, it is used to perform W-arc shaping and guiding pre-bending and shrinking of the semicircular silk bundle sheet for thick cigarettes.

[0043] See also Figure 5In the present application, the narrow W-shaped arc groove 9 comprises a narrow W-shaped arc block 91 and a narrow W-shaped arc block pressing plate 92, and the narrow W-shaped arc block cooperates with the narrow W-shaped arc block pressing plate to form a slit channel. The arc length of the narrow W-shaped arc block is 71 mm-76 mm, the gap width is 2 mm, the arc profile width is 32 mm, the height is 14.5 mm, and the center convex arc radius is 5 mm, which is used to further centrally narrow the pre-bent W-shaped arc-shaped filament sheet to guide the bending and shaping into a small W-shaped arc-shaped filament sheet. If the arc length of the narrow W-shaped arc block is 94 mm-138 mm, the gap width is 2 mm, the arc profile width is 32 mm-38 mm, the height is 20 mm-30 mm, and the center convex arc radius is 5 mm, it is used to further centrally narrow the pre-bent W-shaped arc-shaped filament sheet to guide the bending and shaping into a small W-shaped arc-shaped filament sheet. If the arc length of the narrow W-arc block is 145mm-155mm, the gap width is 2mm, the arc profile width is 70mm-100mm, the height is 20mm-22mm, and the center convex arc radius is 10mm, it is used to perform W-arc shaping and guiding pre-bending and shrinking of the semicircular silk bundle sheet for thick cigarettes.

[0044] See also Figure 6 In the present application, the tightening guide circular groove 10 is a cylinder 101 with a raised guide strip inside, and 2-8 smooth raised stoppers 102 are evenly arranged on the inner surface of the rear half of the cylinder. The cylinder diameter is 16mm, 16.5mm-20mm, and the height of the stopper protrusion from the inner surface of the circumference is 1mm-1.5mm, which is used to directional tighten the bent tow sheet in a smaller space and reduce the twisting and interlacing of the bent tow sheet.

[0045] See also Figure 7 In the present application, the conical funnel 11 is a circular funnel 111 with a set taper. Three smooth raised guide limit blocks 112 are evenly arranged on the top of the upper semicircle near the outlet end of the funnel. The outlet end of the conical funnel is inserted into the filter rod forming machine. The diameter of the inlet end of the funnel is 16 mm-20 mm, and the diameter of the outlet end of the funnel is 10 mm-13 mm. Three smooth raised guide limit blocks are evenly arranged on the top of the upper semicircle near the outlet end of the funnel. The limit blocks have a raised height of 1.5 mm and a length of 10 mm. The outlet end of the funnel is inserted into the filter rod forming machine. The bell mouth of the filter rod forming machine is used to orient the front compressed tow sheet to form a cylinder with a diameter of 10 mm and 11 mm-13 mm.

[0046] The above-mentioned stable suction resistance device for dry reconstituted tobacco filter rod can be used for forming reconstituted tobacco filter rods for thin, medium or thick cigarettes. The convergence center of the above-mentioned stable suction resistance device for dry reconstituted tobacco filter rod is kept on an axial line, and is positioned by the primary limit groove, guided by the three-level bending channel for step-by-step bending and shaping, and guided by the two-level circular channel for gathering and tightening, thereby preventing the high-speed running tow sheet from irregularly moving, twisting and interlacing during the dragging and forming process of the thin filter rod, making the convergence distribution controllable and uniform, which is conducive to improving the stability of the suction resistance of the reconstituted tobacco filter rod.

[0047] The present invention also provides a method for preparing a dry-process reconstituted tobacco filter rod, using any of the above-mentioned devices for stabilizing suction resistance of a dry-process reconstituted tobacco filter rod, and adopting the following steps:

[0048] S1. Raw material unwinding: The dry-process reconstituted tobacco leaves are unrolled by an unwinding machine. The dry-process reconstituted tobacco leaves have a basis weight of 30g / m2-160g / m2, a thickness of 0.05mm-0.60mm, a width of 50 mm -160 mm, a tensile strength of ≥0.3KN / m, a tensile elongation of ≥5.5%, and a bulk thickness of ≥2.5cm3 / g.

[0049] S2, rolling and shredding: The unrolled dry-process reconstituted tobacco leaves are conveyed to the shredding roller, and the dry-process reconstituted tobacco leaves are rolled and cut into strips, which can be completely cut and separated, or partially cut and partially adhered. The width of the strips is 0.7 mm -1.2 mm.

[0050] S3, guided multi-stage bunching: The scented dry reconstituted tobacco leaf filaments are transported to the channel of the guided multi-stage bunching device of the present invention. The sheet-like filaments are positioned by the limit groove, pass through the guide channel gap of the three-stage module, and are gradually bent and shrunk into semicircular, wide W-arc, narrow W-arc, and then enter the guided gathering and tightening channels of the cylinder and the circular funnel cylinder in turn to form a cylinder with uniform filament distribution. Corresponding to the circumference of the cigarette, the guided multi-stage bunching device can be a thick cigarette, medium cigarette or thin cigarette channel. The diameter of the filament cylinder is 10 mm -13 mm.

[0051] S4, wrapping and forming: the cylindrical bundles are bundled into the filter rod forming machine through the tobacco tongue, and are wrapped with forming paper to form round rods with a diameter of 5 mm to 8 mm.

[0052] S5, cutting: using a filter rod cutting machine to cut the wrapped round rod into filter rods of a certain length of 10 mm to 200 mm. The filter rod can be used directly as a cigarette filter material, or it can be combined with other filter rods to form a composite filter rod as a cigarette filter material.

[0053] In the present application, an online flavoring process is also included between step S3 and step S4: the shredded tow belt passes through the flavoring box, and tobacco flavors or preservatives are added according to the metered amount. The flavoring method is spraying or coating flavoring, and the flavoring amount is 0.1%-20% of the weight of the dry reconstituted tobacco leaves. The surface area of ​​the shredded dry reconstituted tobacco leaves is increased, which is more conducive to the ability to load and absorb flavors or preservatives. Through flavoring, the dry reconstituted tobacco leaves can be given a variety of aromas such as tobacco aroma, fruity aroma, floral aroma, sweet aroma, spicy aroma, woody aroma, nutty aroma, and baked aroma.

[0054] In the present application, after the dry reconstituted tobacco leaves are rolled and cut into shreds, they can be directly transported to the guided multi-stage bundling device for guided bending, tightening and bundling without going through the flavoring process.

[0055] The coefficient of variation (CV) of the draw resistance of the dry recombinant tobacco filter rod produced by the device and method of the present application is 3%-5%. Among them, the draw resistance CV of the thin dry recombinant tobacco filter rod is 3.5%-5.0%, the draw resistance CV of the medium dry recombinant tobacco filter rod is 3.5%-4.5%, and the draw resistance CV of the thick dry recombinant tobacco filter rod is 3.0%-4.0%.

[0056] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in the present application. More specifically, within the scope disclosed in the present application, multiple variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A device for stabilizing suction resistance of a dry reconstituted tobacco filter rod, characterized in that: Along the filter rod production sequence, there are six modules including a primary limiting groove, a semicircular groove, a wide W-arc groove, a narrow W-arc groove, a tightening guide circular groove and a conical funnel tube. The six modules are linked to a fixed circular bracket by a circular optical axis and a cross clamp, and the convergence center of the convergence cavity formed by the six modules is maintained on the same axis.

2. The device for stabilizing suction resistance of dry reconstituted tobacco filter rod according to claim 1, characterized in that: The primary limit groove includes two adjustable baffles, a primary limit groove upper plate and a primary limit groove lower plate. The two adjustable baffles are arranged between the primary limit groove upper plate and the primary limit groove lower plate. The two adjustable baffles, the primary limit groove upper plate and the primary limit groove lower plate form a filament bundle limit groove.

3. The device for stabilizing suction resistance of dry reconstituted tobacco filter rod according to claim 1, characterized in that: The semicircular groove comprises a semicircular block and a semicircular block pressing plate, and the semicircular block pressing plate cooperates with the semicircular block to form a gap channel.

4. The device for stabilizing suction resistance of a dry reconstituted tobacco filter rod according to claim 1, characterized in that: The wide W-arc groove comprises a wide W-arc block and a wide W-arc block pressing plate, and the wide W-arc block cooperates with the wide W-arc block pressing plate to form a gap channel.

5. The device for stabilizing suction resistance of dry reconstituted tobacco filter rod according to claim 1, characterized in that: The narrow W-arc groove comprises a narrow W-arc block and a narrow W-arc block pressing plate, and the narrow W-arc block cooperates with the narrow W-arc block pressing plate to form a gap channel.

6. The device for stabilizing suction resistance of dry reconstituted tobacco filter rod according to claim 1, characterized in that: The tightening guide circular groove is a cylinder with a raised guide strip inside, and 2-8 smooth raised limit blocks are evenly arranged on the inner surface of the rear half of the cylinder.

7. The device for stabilizing suction resistance of dry reconstituted tobacco filter rod according to claim 1, characterized in that: The conical funnel is a circular funnel with a set taper. Three smooth raised guide limit blocks are evenly arranged on the top of the upper semicircle near the outlet end of the funnel. The outlet end of the conical funnel is inserted into the tobacco tongue bell mouth of the filter rod forming machine.

8. A method for preparing a dry reconstituted tobacco filter rod, using the device for stabilizing suction resistance of a dry reconstituted tobacco filter rod according to any one of claims 1 to 7, characterized in that: Use the following steps: S1. Raw material unwinding: dry reconstituted tobacco leaf rolls are unwinded by an unwinding machine; S2, rolling and shredding: the dry-process reconstituted tobacco leaves unrolled in step S1 are conveyed to a shredding roller, and the dry-process reconstituted tobacco leaves are rolled and cut into shredded strips, wherein the shredded strips are completely cut and separated or partially cut and partially adhered; S3, guided multi-stage bunching: the dry reconstituted tobacco leaf tow belt is transported to the channel of the stable suction resistance device, the sheet tow belt is positioned by the primary limiting groove, and then passes through the semicircular groove, the wide W arc groove, the narrow W arc groove, the tightening guide circular groove and the conical funnel tube in sequence to form a cylinder with uniform tow distribution; S4, wrapping and forming: the cylindrical tow gathered in step S3 enters the filter rod forming machine through the tobacco tongue, and is wrapped with forming paper to form a round rod; S5. Cutting: Use a filter rod cutting machine to cut the wrapped round rod into filter rods of set length.

9. The method for preparing a dry reconstituted tobacco filter rod according to claim 8, characterized in that: In step S1, the dry reconstituted tobacco has a basis weight of 30 g / m2-160 g / m2, a thickness of 0.05 mm-0.60 mm, a width of 50 mm-160 mm, a tensile strength ≥0.3 KN / m, a tensile elongation ≥5.5%, and a bulk thickness ≥2.5 cm3 / g.

10. The method for preparing a dry reconstituted tobacco filter rod according to claim 8, characterized in that: An online flavoring process is also included between step S3 and step S4, in which the shredded silk band passes through a flavoring box, and tobacco flavors or humectants are added according to a metered amount.

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