Rolled cigarette core preparation device and rolled cigarette core preparation method

Abstract

The embodiment of the invention discloses a preparation device and a preparation method of a rolled tobacco core, the preparation device of the rolled tobacco core comprises a material mixing device, a first rolling device, a first crushing device, a second rolling device and a drying device, the material mixing device is used for mixing tobacco powder with wood pulp fibers and liquid materials, and the first crushing device is used for crushing the tobacco powder; the first rolling device is used for rolling the tobacco particles and obtaining a first forming base material; the first crushing device is used for crushing the first forming base material and obtaining first base material fragments; the second rolling device is used for rolling the first base material fragments and obtaining tobacco core sheets; the drying device is used for drying the tobacco core sheets; the drying temperature is less than or equal to a low-temperature threshold. The wood pulp fibers can be smashed, and the added wood pulp fibers can be fully mixed with other materials. Dry and wet materials in the tobacco sheets are scattered and reloaded for multiple times, the materials are mixed repeatedly, and the distribution uniformity of the materials in the tobacco core is improved to a great extent.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of tobacco manufacturing, and in particular to a device for preparing a rolled cigarette core and a method for preparing a rolled cigarette core. Background Art

[0002] With the World Health Organization's smoking ban requirements and people's pursuit and yearning for a healthy life, tobacco products are currently developing in a smoke-free, diversified and healthy way. The development trend of heated cigarettes is rapid. The heated cigarettes prepared by the roller pressing method have gained high attention and recognition due to the advantages of simple equipment and relatively mature processing methods.

[0003] In the related art, during the rolling process of the heated cigarette core, various materials in the core are unevenly distributed, especially wood pulp fibers are difficult to fully mix with other materials, and knots are easily formed, which reduces the appearance quality of the tobacco sheets and the efficiency of tobacco use. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present invention provides a device for preparing a rolled cigarette core.

[0006] A second aspect of the present invention provides a method for preparing a rolled cigarette core.

[0007] In view of this, according to the first aspect of the technical solution of the present application, a device for preparing a rolled cigarette core is proposed, and the device for preparing the rolled cigarette core includes: a material mixing device, a first rolling device, a first crushing device, a second rolling device and a drying device, the material mixing device is used to mix tobacco powder with wood pulp fibers and liquid materials to obtain tobacco particles, the first rolling device is used to roll the tobacco particles to obtain a first molded substrate, the first crushing device is used to crush the first molded substrate to obtain first substrate fragments, the second rolling device is used to roll the first substrate fragments to obtain cigarette core slices, and the drying device is used to dry the cigarette core slices, and the drying temperature is less than or equal to the low temperature threshold.

[0008] In some technical solutions provided in the present application, optionally, the second rolling device rolls the first substrate fragments to obtain a second shaped substrate, and the preparation device of the rolled cigarette core also includes: a second crushing device and a third rolling device, the second crushing device is used to crush the second shaped substrate to obtain second substrate fragments, and the third rolling device is used to roll the second substrate fragments to obtain cigarette core slices.

[0009] In some technical solutions provided in the present application, optionally, the preparation device of the rolled cigarette core further includes: a coarse grinding device, a fine grinding device, a cigarette powder buffer tank, a first vacuum feeding device, a second vacuum feeding device and a weightless feeding device. The coarse grinding device is used to grind the cigarette flakes to obtain coarse powder, the fine grinding device is used to grind the coarse powder to obtain cigarette powder, so that the particle size of the cigarette powder is smaller than that of the coarse powder, the first vacuum feeding device is used to transport the cigarette powder to the cigarette powder buffer tank, and the second vacuum feeding device and the weightless feeding device are used to quantitatively transport the cigarette powder in the buffer tank to the material mixing device.

[0010] The second technical solution of the present application provides a method for preparing a rolled cigarette core, which includes: mixing tobacco powder with wood pulp fibers and liquid materials through a material mixing device to obtain tobacco particles; rolling the tobacco particles through a first rolling device to obtain a first molded substrate; crushing the first molded substrate through a first crushing device to obtain first substrate fragments; rolling the first substrate fragments through a second rolling device to obtain cigarette core slices; and drying the cigarette core slices, wherein the drying temperature is less than or equal to the low temperature threshold.

[0011] In some technical solutions provided in the present application, optionally, the step of rolling the first substrate fragments by a second rolling device to obtain a tobacco core sheet specifically includes: rolling the first substrate fragments by a second rolling device to obtain a second molded substrate; crushing the second molded substrate by a second crushing device to obtain second substrate fragments; and rolling the second substrate fragments by a third rolling device to obtain a tobacco core sheet.

[0012] In some technical solutions provided in the present application, optionally, the thickness of the first molding substrate is B1, the thickness of the second molding substrate is B2, and the thickness of the tobacco core sheet is B3, wherein B1>B2≥B3.

[0013] In some technical solutions provided in the present application, optionally, the outer dimensions of the second substrate fragments are smaller than the outer dimensions of the first substrate fragments.

[0014] In some technical solutions provided in the present application, optionally, before the step of mixing the tobacco powder with the liquid material, it also includes: grinding the tobacco sheets by a coarse grinding device to obtain coarse powder; grinding the coarse powder by a fine grinding device to obtain tobacco powder, and the particle size of the tobacco powder is smaller than the particle size of the coarse powder.

[0015] In some technical solutions provided in the present application, optionally, after the step of grinding the coarse powder by a fine grinding device to obtain tobacco powder, it also includes: conveying the tobacco powder to a tobacco powder buffer tank through a first vacuum feeding device; and quantitatively conveying the tobacco powder in the buffer tank to a material mixing device through a second vacuum feeding device and a loss-in-weight feeding device.

[0016] In some technical solutions provided in the present application, optionally, after the step of drying the tobacco core slices, the step further includes: cutting the tobacco core slices into shreds, or rolling up the tobacco core slices for storage.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] When the first crushing device crushes the first molded substrate after preliminary rolling, it can crush the wood pulp fibers in the first molded substrate, avoid the situation of wood pulp fibers being dead knotted, and fully mix the added wood pulp fibers with other materials. In addition, the tobacco substrate undergoes multiple rolling forming and crushing processes, so that the dry and wet materials in the tobacco sheets undergo multiple scattered and reloaded operations, and the materials are repeatedly mixed, which greatly improves the uniformity of the distribution of various materials in the cigarette core, improves the appearance quality of the tobacco sheets, and improves the use efficiency of tobacco. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 A schematic structural diagram of a device for preparing a rolled cigarette core according to an embodiment of the present application;

[0021] Figure 2 A schematic flow chart of a method for preparing a rolled cigarette core according to an embodiment of the present application.

[0022] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0023] 10 a device for preparing roller-pressed cigarette cores, 100 a material mixing device, 210 a first roller-pressing device, 310 a first crushing device, 220 a second roller-pressing device, 400 a drying device, 320 a second crushing device, 230 a third roller-pressing device, 510 a coarse grinding device, 520 a fine grinding device, 600 a cigarette powder buffer tank, 710 a first vacuum feeding device, 720 a second vacuum feeding device, 730 a loss-in-weight feeding device, and 800 a shredding device. DETAILED DESCRIPTION

[0024] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0025] The first embodiment of the present application provides a device 10 for preparing a rolled cigarette core, such as Figure 1 As shown, the preparation device 10 of the rolled cigarette core includes: a material mixing device 100, a first rolling device 210, a first crushing device 310, a second rolling device 220 and a drying device 400, the material mixing device 100 is used to mix tobacco powder with wood pulp fibers and liquid materials to obtain tobacco particles, the first rolling device 210 is used to roll tobacco particles to obtain a first molded substrate, the first crushing device 310 is used to crush the first molded substrate to obtain first substrate fragments, the second rolling device 220 is used to roll the first substrate fragments to obtain cigarette core slices, and the drying device 400 is used to dry the cigarette core slices, and the drying temperature is less than or equal to the low temperature threshold.

[0026] In this embodiment, tobacco powder, wood pulp fibers and liquid materials are mixed by the material mixing device 100 to form tobacco particles. The prepared tobacco particles are transported to the first rolling device 210 via a belt conveyor. The first rolling device 210 performs preliminary rolling forming on the tobacco substrate, so that the tobacco particles are rolled to form a first shaped substrate in a sheet state.

[0027] The first formed substrate is transported to the first crushing device 310 via a belt conveyor. The first crushing device 310 is provided with a high-speed rotating cutter, which breaks the formed substrate and forms first substrate fragments. The first substrate fragments are transported to the second roller pressing device 220 via a belt conveyor. The second roller pressing device 220 rolls the tobacco substrate again, so that the first substrate fragments are remixed after rolling by the second roller pressing device 220, and the finished tobacco core slices are formed. The tobacco core slices are transported to the drying device 400 via a mesh belt. The drying device 400 performs low-temperature drying on the tobacco core slices to evaporate the moisture in the tobacco core. The low temperature threshold can be 120°C.

[0028] When the first crushing device 310 crushes the first molded substrate after preliminary rolling, the wood pulp fibers in the first molded substrate can be crushed to avoid the occurrence of dead knots of wood pulp fibers, and the added wood pulp fibers are fully mixed with other materials. In addition, the tobacco substrate undergoes multiple rolling forming and crushing processes, so that the dry and wet materials in the tobacco sheets undergo multiple breaking and reloading operations, and the materials are repeatedly mixed, which greatly improves the uniformity of the distribution of various materials in the cigarette core, improves the appearance quality of the tobacco sheets, and improves the use efficiency of tobacco shreds.

[0029] In some embodiments provided in this application, Figure 1 As shown, optionally, the second rolling device 220 rolls the first substrate fragments to obtain a second shaped substrate, and the rolled cigarette core preparation device 10 also includes: a second crushing device 320 and a third rolling device 230, the second crushing device 320 is used to crush the second shaped substrate to obtain second substrate fragments, and the third rolling device 230 is used to roll the second substrate fragments to obtain cigarette core slices.

[0030] In this embodiment, the first substrate fragments are rolled by the second rolling device 220 to form a second molded substrate, and the second molded substrate is transported to the second crushing device 320 via a belt conveyor. The second crushing device 320 crushes the molded cigarette core substrate again, and the crushed second substrate fragments are transported to the third rolling device 230. The second substrate fragments are rolled and mixed by the third rolling device 230 to form cigarette core slices.

[0031] By means of the second crushing device 320 and the third rolling device 230, the tobacco is rolled three times and crushed twice, which increases the operation of breaking up and reloading the tobacco core substrate, further fully mixes the materials in the tobacco core, improves the uniformity of the distribution of the materials in the tobacco core, and improves the efficiency of tobacco use.

[0032] Exemplarily, the preparation device 10 for rolling a cigarette core further includes: a third crushing device and a fourth rolling device, wherein the third rolling device 230 is used to roll the second substrate fragments to obtain a third shaped substrate, the third crushing device is used to crush the third shaped substrate to obtain third substrate fragments, and the fourth rolling device is used to roll the third substrate fragments to obtain cigarette core flakes. The tobacco is rolled four times and crushed three times, which increases the operation of breaking up and reloading the cigarette core substrate and improves the uniformity of the distribution of various materials in the tobacco cigarette core.

[0033] In some embodiments provided in the present application, optionally, the roller pressure of the third roller pressing device 230 is greater than or equal to the roller pressure of the second roller pressing device 220, and greater than the roller pressure of the first roller pressing device 210, and the tool speed of the second crushing device 320 is greater than the tool speed of the first crushing device 310.

[0034] In this embodiment, the pressing force of the third rolling device 230 and the second rolling device 220 is greater than the pressing force of the first rolling device 210. The cigarette core substrate is rolled step by step by the rolling devices, so that the thickness of the cigarette core substrate is gradually reduced during the production process, and the rolling pressure of each rolling device is reduced, so that the rolling effect of the cigarette core substrate is more uniform, and the uniformity of the thickness of the finished cigarette core sheet is improved.

[0035] The tool speed of the second crushing device 320 is greater than that of the first crushing device 310, so that the crushing effect of the second crushing device 320 is stronger. The tobacco core substrate is crushed step by step, so that the crushing effect of the tobacco core substrate is more sufficient. The outer size is the maximum size of the substrate fragments. The outer size of the second substrate fragments is smaller than the outer size of the first substrate fragments, so that the second substrate fragments are more finely broken, thereby improving the uniformity of subsequent rolling and mixing of the tobacco core substrate.

[0036] Exemplarily, the rotation speed of the cutter of the first crushing device 310 is 1000 rpm, and the rotation speed of the cutter of the second crushing device 320 is 1200 rpm.

[0037] In some embodiments provided in this application, Figure 1 As shown, optionally, the preparation device 10 of the rolled tobacco core further includes: a coarse grinding device 510, a fine grinding device 520, a tobacco powder buffer tank 600, a first vacuum feeding device 710, a second vacuum feeding device 720 and a weightless feeding device 730. The coarse grinding device 510 is used to grind tobacco sheets to obtain coarse powder, the fine grinding device 520 is used to grind coarse powder to obtain tobacco powder, so that the particle size of the tobacco powder is smaller than that of the coarse powder, the first vacuum feeding device 710 is used to transport the tobacco powder to the tobacco powder buffer tank 600, and the second vacuum feeding device 720 and the weightless feeding device 730 are used to quantitatively transport the tobacco powder in the buffer tank to the material mixing device 100.

[0038] In this embodiment, the tobacco sheet is sequentially subjected to the coarse grinding operation of the coarse grinding device 510 and the fine grinding operation of the fine grinding device 520, so that the particle size of the tobacco sheet after double grinding is gradually reduced, and the particle size of the tobacco powder after step-by-step grinding is made smaller, thereby improving the uniformity of the tobacco powder when mixed with other materials.

[0039] The first vacuum feeding device 710 uses negative pressure to transport the tobacco powder to the tobacco powder buffer tank 600, and then transports the tobacco powder to the material mixing device 100 to mix the tobacco powder. The second vacuum feeding device 720 and the weightless feeding device 730 enable the tobacco powder to be quantitatively transported, thereby improving the accuracy of tobacco powder transportation and improving the stability and safety of tobacco powder transportation.

[0040] Exemplarily, the vacuum feeding device can be a vacuum feeder or a loss-in-weight feeder.

[0041] In some embodiments provided in this application, Figure 1 As shown, optionally, the device 10 for preparing the rolled tobacco core further comprises: a shredding device 800 for shredding the tobacco core slices.

[0042] In this embodiment, the tobacco core slices dried at low temperature are cut into shreds so as to facilitate subsequent filling of the shredded tobacco.

[0043] The second embodiment of the present application provides a method for preparing a rolled cigarette core, such as Figure 2 As shown, the preparation method of the rolled cigarette core comprises:

[0044] Step 101, mixing tobacco powder, wood pulp fibers and liquid material by a material mixing device to obtain tobacco particles;

[0045] Step 102, rolling the tobacco particles by a first rolling device to obtain a first formed substrate;

[0046] Step 103, crushing the first formed substrate by a first crushing device to obtain first substrate fragments;

[0047] Step 104, rolling the first substrate fragments by a second rolling device to obtain a cigarette core sheet;

[0048] Step 105, drying the cigarette core slice, wherein the drying temperature is less than or equal to the low temperature threshold.

[0049] In this embodiment, tobacco powder, wood pulp fibers and liquid material are mixed by a material mixing device to form tobacco particles. The prepared tobacco particles are transported to a first rolling device via a belt conveyor. The first rolling device performs preliminary rolling forming on the tobacco substrate, so that the tobacco particles are rolled to form a first shaped substrate in a sheet state.

[0050] The first formed substrate is transported to the first crushing device via a belt conveyor. The first crushing device is equipped with a high-speed rotating tool. The tool breaks the formed substrate and forms first substrate fragments. The first substrate fragments are transported to the second roller pressing device via a belt conveyor. The second roller pressing device rolls the tobacco substrate again, so that the first substrate fragments are remixed after rolling by the second roller pressing device, and the finished tobacco core slices are formed. The tobacco core slices are transported to the drying device via a mesh belt. The drying device performs low-temperature drying on the tobacco core slices to evaporate the moisture in the tobacco core. The low temperature threshold can be 120°C.

[0051] When the first crushing device crushes the first molded substrate after preliminary rolling, it can crush the wood pulp fibers in the first molded substrate, avoid the situation of wood pulp fibers being dead knotted, and fully mix the added wood pulp fibers with other materials. In addition, the tobacco substrate undergoes multiple rolling forming and crushing processes, so that the dry and wet materials in the tobacco sheets undergo multiple scattered and reloaded operations, and the materials are repeatedly mixed, which greatly improves the uniformity of the distribution of various materials in the cigarette core, improves the appearance quality of the tobacco sheets, and improves the use efficiency of tobacco.

[0052] Exemplarily, the liquid material includes at least one of a smoke generating agent, an adhesive, water or a flavoring agent, and the drying temperature matches the liquid material. The liquid material is selected according to the desired type of tobacco product. Since the water content in different liquid materials is different, a suitable drying temperature is selected according to the type and amount of the liquid material to improve the use effect of the cigarette core.

[0053] In some embodiments provided in the present application, optionally, the step of rolling the first substrate fragments by a second rolling device to obtain a tobacco core sheet specifically includes: rolling the first substrate fragments by a second rolling device to obtain a second molded substrate; crushing the second molded substrate by a second crushing device to obtain second substrate fragments; and rolling the second substrate fragments by a third rolling device to obtain a tobacco core sheet.

[0054] In this embodiment, the first substrate fragments are rolled by the second rolling device to form a second molded substrate, the second molded substrate is transported to the second crushing device via a belt conveyor, the second crushing device crushes the molded cigarette core substrate again, and the crushed second substrate fragments are transported to the third rolling device, the second substrate fragments are rolled and mixed by the third rolling device to form cigarette core slices.

[0055] By means of the second crushing device and the third rolling device, the tobacco is rolled three times and crushed twice, which increases the operation of breaking up and reloading the tobacco core substrate, further fully mixes the materials in the tobacco core, improves the uniformity of the distribution of the materials in the tobacco core, and improves the utilization efficiency of the tobacco.

[0056] Exemplarily, the step of rolling the second substrate fragments by the third rolling device to obtain the tobacco core flakes specifically includes: rolling the second substrate fragments by the third rolling device to obtain the third shaped substrate; crushing the third shaped substrate by the third crushing device to obtain the third substrate fragments; and rolling the third substrate fragments by the fourth rolling device to obtain the tobacco core flakes. The tobacco is rolled four times and crushed three times, which increases the operation of breaking up and reloading the tobacco core substrate and improves the uniformity of the distribution of various materials in the tobacco core.

[0057] In some embodiments provided in the present application, optionally, the thickness of the first molding substrate is B1, the thickness of the second molding substrate is B2, and the thickness of the tobacco core sheet is B3, wherein B1>B2≥B3.

[0058] In this embodiment, the pressing force of the third rolling device and the second rolling device is greater than that of the first rolling device. The cigarette core substrate is rolled step by step by the rolling devices, so that the thickness of the cigarette core substrate is gradually reduced during the production process, reducing the rolling pressure of each rolling device, making the rolling effect of the cigarette core substrate more uniform, and improving the uniformity of the thickness of the finished cigarette core sheet.

[0059] Illustratively, B1 may be 1 mm to 2 mm, and B2 and B3 may be 0.18 mm to 0.2 mm.

[0060] In some embodiments provided in the present application, optionally, the outer dimensions of the second substrate fragments are smaller than the outer dimensions of the first substrate fragments.

[0061] In this embodiment, the tool speed of the second crushing device is greater than that of the first crushing device, so that the crushing effect of the second crushing device is stronger, and the tobacco core substrate is crushed step by step, so that the crushing effect of the tobacco core substrate is more sufficient, and the outer size is the maximum size of the substrate fragments. The outer size of the second substrate fragments is smaller than the outer size of the first substrate fragments, so that the second substrate fragments are more finely broken, thereby improving the uniformity of subsequent rolling and mixing of the tobacco core substrate.

[0062] For example, the outer dimensions of the first substrate fragments may be 1 mm to 2 mm, and the outer dimensions of the second substrate fragments may be 0.18 mm to 0.2 mm.

[0063] In some embodiments provided in the present application, optionally, before the step of mixing the tobacco powder with the liquid material, it also includes: grinding the tobacco flakes by a coarse grinding device to obtain coarse powder; and grinding the coarse powder by a fine grinding device to obtain tobacco powder, wherein the particle size of the tobacco powder is smaller than that of the coarse powder.

[0064] In this embodiment, the tobacco sheet is sequentially subjected to the coarse grinding operation of the coarse grinding device and the fine grinding operation of the fine grinding device, so that the particle size of the tobacco sheet after double grinding is gradually reduced, and the particle size of the tobacco powder after step-by-step grinding is made smaller, thereby improving the uniformity of the tobacco powder when mixed with other materials.

[0065] Exemplarily, the particle size of the smoke powder may be 200 mesh to 300 mesh.

[0066] In some embodiments provided in the present application, optionally, after the step of grinding the coarse powder by a fine grinding device to obtain tobacco powder, the step further includes: conveying the tobacco powder to a tobacco powder buffer tank through a first vacuum feeding device; and quantitatively conveying the tobacco powder in the buffer tank to a material mixing device through a second vacuum feeding device and a loss-in-weight feeding device.

[0067] In this embodiment, the first vacuum feeding device uses negative pressure to transport the tobacco powder to the tobacco powder buffer tank, and then transports the tobacco powder to the material mixing device to mix the tobacco powder. The second vacuum feeding device and the weightless feeding device enable the tobacco powder to be quantitatively transported, thereby improving the accuracy of tobacco powder transportation and improving the stability and safety of tobacco powder transportation.

[0068] In some embodiments provided in the present application, optionally, after the step of drying the tobacco core slices, the method further includes: cutting the tobacco core slices into shreds, or rolling up the tobacco core slices for storage.

[0069] In this embodiment, the low-temperature dried tobacco core slices are cut into shreds for subsequent filling. Alternatively, the tobacco core slices are rolled up and stored before being cut, so that when needed, the tobacco core slices are transported to the cutting device for cutting to improve the freshness of the tobacco.

[0070] In a specific embodiment, the tobacco slices required for preparing the tobacco core slices are crushed into 200 to 300 mesh tobacco powder by a coarse grinding device and a fine grinding device, and the prepared tobacco powder is passed through a first vacuum feeding device and enters a tobacco powder buffer tank. The tobacco powder in the buffer tank is then quantitatively transported to a material mixing device through a second vacuum feeding device and a weightless feeding device. At the same time, liquid materials such as smoke-generating agents are added to the material mixing device, and the tobacco particles are made through preliminary mixing by the material mixing device. The prepared tobacco particles are transported to the first rolling device through a belt conveyor to form a 1mm to 2mm thick tobacco core substrate. The formed thin sheet tobacco core substrate is broken into 1mm to 2mm wide fragments by a high-speed flying knife of the first crushing device. The crushed fragments are passed through a second rolling device and rolled into a 0.18mm to 0.2mm thick tobacco core substrate. The rolled tobacco core substrate is then broken by a second crushing device. The crushed tobacco core substrate is passed through the third rolling device to be rolled into a 0.18mm to 0.2mm thick tobacco core slice. This process can further mix the materials and fully mix the wood pulp fiber added in the material mixing section with other materials. The tobacco core slice is passed through the drying section for low-temperature drying. Finally, the mixed slice is cut into shreds by the shredding device, or the rolled slice is rolled and stored, and unrolled and shredded when needed.

[0071] The crushing section can break up the thin slices after the initial rolling, and at the same time break up the wood pulp fibers in the thin slices, thereby improving the uniformity of subsequent mixing. Through the operation of roll forming-crushing-roll forming-crushing, this process can break up the dry and wet materials in the cigarette core thin slices, reload them, and mix them repeatedly, so that their uniformity is greatly improved, and at the same time solve the problem that the original process cannot mix the added wood pulp fibers with other materials uniformly.

[0072] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0074] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for preparing a rolled cigarette core, characterized in that: include: A material mixing device, used to mix tobacco powder with wood pulp fibers and liquid materials to obtain tobacco particles; A first rolling device, used for rolling the tobacco particles to obtain a first shaped substrate; A first crushing device, used for crushing the first molded substrate to obtain first substrate fragments; A second rolling device, used for rolling the first substrate fragments to obtain cigarette core sheets; A drying device is used to dry the cigarette core sheet, and the drying temperature is less than or equal to the low temperature threshold.

2. The device for preparing rolled cigarette core according to claim 1, characterized in that: The second rolling device rolls the first substrate fragments to obtain a second shaped substrate, and the rolling cigarette core preparation device also includes: A second crushing device, used to crush the second molded substrate to obtain second substrate fragments; The third rolling device is used for rolling the second substrate fragments to obtain the cigarette core slices.

3. The device for preparing a rolled cigarette core according to claim 1, characterized in that: Also includes: A coarse grinding device for grinding tobacco flakes to obtain coarse powder; A fine grinding device, used for grinding the coarse powder to obtain the tobacco powder, so that the particle size of the tobacco powder is smaller than the particle size of the coarse powder; Smoke powder cache tank; A first vacuum feeding device, used for conveying the tobacco powder to the tobacco powder buffer tank; The second vacuum loading device and the loss-in-weight feeding device are used to quantitatively transport the tobacco powder in the buffer tank to the material mixing device.

4. A method for preparing a rolled cigarette core, characterized in that: include: The tobacco powder is mixed with wood pulp fibers and liquid materials by a material mixing device to obtain tobacco particles; Rolling the tobacco particles by a first rolling device to obtain a first shaped substrate; crushing the first formed substrate by a first crushing device to obtain first substrate fragments; Rolling the first substrate fragments by a second rolling device to obtain a cigarette core sheet; The cigarette core sheet is dried, and the drying temperature is less than or equal to the low temperature threshold.

5. The method for preparing a rolled cigarette core according to claim 4, characterized in that: The step of rolling the first substrate fragments by a second rolling device to obtain a cigarette core sheet specifically includes: Rolling the first substrate fragments by the second rolling device to obtain a second formed substrate; crushing the second molded substrate by a second crushing device to obtain second substrate fragments; The second substrate fragments are rolled by a third rolling device to obtain the cigarette core sheet.

6. The method for preparing a rolled cigarette core according to claim 5, characterized in that: The thickness of the first molding substrate is B1, the thickness of the second molding substrate is B2, and the thickness of the cigarette core sheet is B3, wherein B1>B2≥B3.

7. The method for preparing a rolled cigarette core according to claim 5, characterized in that: The outer dimensions of the second substrate fragments are smaller than the outer dimensions of the first substrate fragments.

8. The method for preparing a rolled cigarette core according to claim 4, characterized in that: Before the step of mixing the tobacco powder with the liquid material, the method further comprises: Grinding tobacco flakes by a coarse grinding device to obtain coarse powder; The coarse powder is ground by a fine grinding device to obtain the tobacco powder, and the particle size of the tobacco powder is smaller than that of the coarse powder.

9. The method for preparing a rolled cigarette core according to claim 8, characterized in that: After the step of grinding the coarse powder by a fine grinding device to obtain the tobacco powder, the method further comprises: The tobacco powder is conveyed to the tobacco powder buffer tank through a first vacuum feeding device; The tobacco powder in the buffer tank is quantitatively transported to the material mixing device through the second vacuum feeding device and the weightless feeding device.

10. The method for preparing a rolled cigarette core according to any one of claims 4 to 9, characterized in that: After the step of drying the cigarette core sheet, the method further comprises: Cutting the tobacco core slice into shreds; or The cigarette core sheet is rolled up for storage.

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