Tobacco sheet calendering system and tobacco sheet calendering method

Abstract

The invention discloses a tobacco sheet calendering system and a tobacco sheet calendering method.The tobacco sheet calendering system is used for calendering and conveying tobacco materials to form tobacco sheets, the tobacco materials have a first extending direction and a second extending direction, and the calendering system comprises a calendering unit and a folding unit; the calendaring unit comprises a first calendaring unit and a second calendaring unit, the folding unit comprises a folding unit, and the first calendaring unit is used for calendaring tobacco materials in the first extension direction; the folding unit is used for receiving the tobacco materials transmitted from the first calendering unit and folding the tobacco materials; the second calendaring unit is used for receiving the tobacco material folded by the folding unit and calendaring the tobacco material along a second extension direction; the first extending direction intersects with the second extending direction. According to the tobacco sheet calendering system and method, the difference between the transverse tensile strength and the longitudinal tensile strength of the tobacco sheet can be reduced, and the production efficiency and the production quality of the tobacco sheet are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco sheet preparation, and in particular to a tobacco sheet calendering system and a tobacco sheet calendering method. Background Art

[0002] Tobacco flakes are one of the important raw materials for tobacco products. The method for preparing tobacco flakes includes using calendering technology to extrude the mixed raw materials into continuous thin sheets. It is found in production that the longitudinal tensile strength (the direction of sheet calendering operation) of tobacco flakes prepared by calendering is significantly higher than the transverse tensile strength. If the transverse tensile strength is insufficient, the calendered flakes will produce longitudinal cracks during subsequent traction, drying, and reeling processes, affecting production continuity and product quality. Insufficient transverse strength will also cause the finished flakes to break more in the subsequent shredding step, reducing the product yield.

[0003] Generally speaking, this phenomenon is related to various parameters in the calendering process. For example, when rollers are used to calender tobacco materials, roller speed and speed ratio, material cooling speed, material (roller) temperature, roller level, feed thickness and product thickness will all have an impact. In the calendering process, this phenomenon is always reduced by controlling the roller speed or calendering temperature. However, due to factors such as the capacity matching of the previous and subsequent processes and the properties of the materials, the adjustable range of roller speed and temperature is small, and the effect is not obvious. Summary of the invention

[0004] The present invention provides a tobacco sheet calendering system to solve the above technical problems.

[0005] The present invention provides a tobacco sheet calendering system, which is used for calendering and conveying tobacco materials to form tobacco sheets. The tobacco materials have a first extension direction and a second extension direction. The calendering system comprises a calendering unit and a folding unit. The calendering unit comprises a first calendering unit and a second calendering unit. The folding unit comprises a folding unit. The first calendering unit is used for calendering the tobacco materials along the first extension direction; the folding unit is used for receiving the tobacco materials conveyed from the first calendering unit and folding the tobacco materials; the second calendering unit is used for receiving the tobacco materials folded by the folding unit and calendering the tobacco materials along the second extension direction; the first extension direction and the second extension direction intersect.

[0006] By adopting the above technical scheme, the tobacco material can be rolled in different directions, thereby ensuring the longitudinal tensile strength while improving the transverse tensile strength of the tobacco sheet, thereby reducing the difference between the transverse and longitudinal tensile strengths of the tobacco sheet and improving the production efficiency and quality of the tobacco sheet.

[0007] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a calendering system for tobacco sheets, wherein the first extension direction and the second extension direction intersect to form a first angle, and the first angle is 60-90 degrees.

[0008] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a calendering system for tobacco sheets, wherein a first extension direction and a second extension direction intersect to form a first angle, a first calendering unit includes a first calendering roller group for rolling, a second calendering unit includes a second calendering roller group for rolling, an axis of the first calendering roller group and an axis of the second calendering roller group intersect to form a second angle, and the first angle is equal to the second angle.

[0009] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a tobacco sheet calendering system, wherein a first calendering unit comprises a plurality of calendering roller groups arranged at intervals, the axes of the plurality of calendering roller groups arranged at intervals are parallel to each other, and are used to perform multiple calendering on tobacco materials along a first extension direction, and a second calendering unit comprises a plurality of calendering roller groups arranged at intervals, the axes of the plurality of calendering roller groups arranged at intervals are parallel to each other, and are used to perform multiple calendering on tobacco materials along a second extension direction.

[0010] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a calendering system for tobacco sheets, wherein the first calendering unit includes a first calendering roller group and a first conveying platform, the first conveying platform is used to receive and convey the tobacco material calendered by the first calendering roller group, the tobacco material falls into the folding unit from the end of the first conveying platform, the first conveying platform includes at least one first inclined conveying surface, and the height of the inclined conveying surface relative to the horizontal plane gradually increases along the conveying direction to lift the tobacco material and then drop it into the folding unit.

[0011] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a tobacco sheet calendering system, wherein the tobacco material calendered by the first calendering roller group falls onto an inclined transmission surface, and the inclined transmission surface extends along the transmission direction to the end of the first transmission platform.

[0012] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a tobacco sheet calendering system, wherein the first transmission platform is a first inclined transmission surface.

[0013] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a calendering system for tobacco sheets, wherein the folding unit includes a folding machine and a folding transmission platform, the folding machine is used to fold the tobacco material from the first calendering unit, the folding transmission platform is used to receive and transmit the tobacco material from the folding machine, the tobacco material falls from the end of the folding transmission platform into the second calendering unit, the folding transmission platform includes at least one section of inclined folding transmission surface, and the height of the inclined folding transmission surface relative to the horizontal plane gradually increases along the transmission direction, so as to lift the tobacco material and then fall it into the second calendering unit.

[0014] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a tobacco sheet calendering system, wherein the tobacco material after passing through the folding machine falls onto an inclined folding transmission surface, and the inclined folding transmission surface extends along the transmission direction to the end of the folding transmission platform.

[0015] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a tobacco sheet calendering system, wherein the folding and conveying platform is an inclined folding and conveying surface.

[0016] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a calendering system for tobacco sheets, the folding unit includes a folding machine and a folding transmission platform, the folding machine is used to fold the tobacco material from the first calendering unit, and includes a double material guiding rod and a push-pull mechanism, the double material guiding rod has a first rod and a second rod arranged relatively spaced apart along the width direction, the tobacco material transmitted from the first calendering unit passes through the gap between the first rod and the second rod and is guided to the folding transmission platform, the push-pull mechanism is used to drive the double material guiding rod to move back and forth along the width direction to fold the tobacco material.

[0017] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a calendering system for tobacco sheets, in which tobacco material from a first calendering unit falls into a gap between a first rod and a second rod and is folded back and forth.

[0018] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a tobacco sheet calendering system, wherein a first rod and a second rod are respectively provided with photoelectric sensing devices arranged relatively along the width direction, and the photoelectric sensing devices are located at the material guiding entrance of the double material guiding rods. When the photoelectric sensing device senses that tobacco material falls in, the first rod and the second rod are close to each other from an initial state along the width direction to form a clamping space, and move back and forth along the width direction; when the photoelectric sensing device cannot sense the tobacco material, the first rod and the second rod are separated from each other along the width direction and return to the initial state, and stop moving back and forth.

[0019] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a tobacco sheet calendering system, wherein the folding unit includes a shaping roller for squeezing and flattening the folded tobacco material along both ends perpendicular to the folding direction.

[0020] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a calendering system for tobacco sheets, wherein the first calendering unit includes a first calendering roller group and a first transmission platform, the first transmission platform is used to receive and transmit the tobacco material calendered by the first calendering roller group, the second calendering unit includes a second calendering roller group and a second transmission platform, the second transmission platform is used to receive and transmit the tobacco material calendered by the second calendering roller group, the transmission direction of the first transmission platform is consistent with the calendering direction of the first calendering roller group, and the transmission direction of the second transmission platform is consistent with the calendering direction of the second calendering roller group.

[0021] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a calendering system for tobacco sheets, wherein the calendering unit includes N calendering groups, including a first calendering group, a second calendering group to an Nth calendering group, wherein N is a positive integer greater than or equal to 3; the first calendering group to the Nth calendering group are arranged in sequence along the transmission direction of the entire calendering system, and are used to perform N groups of calendering on the tobacco material, and alternately calender the tobacco material along a first extension direction and a second extension direction; the folding unit includes a plurality of folding groups, and the folding groups are respectively arranged between two adjacent calendering groups along the transmission direction of the entire calendering system, and are used to fold the tobacco material transmitted from the previous calendering group and transmit it to the next calendering group.

[0022] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a tobacco sheet calendering system, a folding machine is used to fold the tobacco material calendered by a previous calendering group along a previous extension direction, and the previous extension direction is the direction in which the tobacco material is extended after calendering by the previous calendering group.

[0023] The present invention also provides a method for calendering tobacco sheets, comprising the following steps: a first calendering step: calendering the tobacco material along a first extension direction; folding: folding the tobacco material; a second calendering step: calendering the folded tobacco material along a second extension direction; wherein the first extension direction and the second extension direction intersect.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for calendering tobacco sheets, wherein one group of calendering steps includes calendering the tobacco material multiple times along a first extension direction, and the second group of calendering steps includes calendering the tobacco material multiple times along a second extension direction.

[0025] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a method for calendering tobacco sheets, in which the tobacco material is lifted after a set of calendering steps and falls into a folding unit for a folding step.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for calendering tobacco sheets, wherein two groups of calendering steps are performed by a second calendering unit, and the tobacco material is lifted after the folding step and falls into the second calendering unit to perform two groups of calendering steps.

[0027] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a method for calendering tobacco sheets, wherein the folding step is to fold the tobacco material back and forth.

[0028] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a method for calendering tobacco sheets, wherein the folding step further includes extruding and flattening the folded tobacco material at both ends perpendicular to the folding direction.

[0029] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for calendering a tobacco sheet, which also includes performing N groups of calendering on the tobacco material, wherein N is a positive integer greater than or equal to 3; the N groups of calendering are alternating calendering of the tobacco material along a first extension direction and a second extension direction; and a folding step is also included between two adjacent groups of calendering.

[0030] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for calendering tobacco sheets, wherein the folding step folds the previous group of calendered tobacco materials along the previous extension direction, and the previous extension direction is the direction in which the previous group of calendered tobacco materials are extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional top view schematic diagram of a calendering system according to a specific embodiment of the present invention is shown;

[0032] Figure 2 A three-dimensional rear view schematic diagram of a calendering system according to a specific embodiment of the present invention is shown;

[0033] Figure 3 A three-dimensional schematic diagram showing a calendering system according to a specific embodiment of the present invention;

[0034] Figure 4 A schematic three-dimensional side view of a calendering system according to a specific embodiment of the present invention is shown;

[0035] Figure 5 A three-dimensional partially enlarged schematic diagram showing a calendering system according to a specific embodiment of the present invention;

[0036] Figure 6 A schematic plan view of a calendering system according to a specific embodiment of the present invention is shown;

[0037] Figure 7 A schematic plan view of a calendering system according to another specific embodiment of the present invention is shown;

[0038] Figure 8a A simplified schematic diagram showing a calendering system according to a specific embodiment of the present invention Figure 1 ;

[0039] Figure 8b A simplified schematic diagram showing a calendering system according to a specific embodiment of the present invention Figure 2 ;

[0040] Figure 8c A simplified schematic diagram showing a calendering system according to a specific embodiment of the present invention Figure 3 ;

[0041] Fig. 9 A schematic diagram showing the structure of a folding machine and shaping rollers of a calendering system according to a specific embodiment of the present invention is shown;

[0042] Fig.10 A structural schematic diagram showing another arrangement of shaping rollers of a calendering system according to a specific embodiment of the present invention.

[0043] (Explanation of symbols)

[0044] 1. Calendering system

[0045] 10 calendering units

[0046] 20 folding units

[0047] 30 Tobacco materials

[0048] 101 The first calendering unit

[0049] 1011 first calendering roller group

[0050] 1012 First Transmission Platform

[0051] 1013 first inclined transmission surface

[0052] 1014 End

[0053] 1015 The rest

[0054] 102 The second calendering unit

[0055] 1021 second calendering roller group

[0056] 201 Folding Unit

[0057] 2011 Folding Machine

[0058] 2012 Folding Transmission Platform

[0059] 2013 Tilt folding transmission surface

[0060] 2014 Double rod guide

[0061] First fishing trip of 2014a

[0062] 2014b Second rod

[0063] 2015 Push-Pull Mechanism

[0064] 2016 Chute

[0065] 2017 Photoelectric Sensor Device

[0066] 2018 Shaping Roller

[0067] 2019 Rack

[0068] 2020 Height Adjustment Turbine Screw

[0069] 2021 drive motor and reducer

[0070] AThe first extension direction

[0071] B Second extension direction

[0072] αThe first angle

[0073] β Second angle

[0074] CTransmission direction

[0075] DWidth direction

[0076] E Folding transmission direction

[0077] FRotation direction

[0078] G The transmission direction of the entire calendering system

[0079] L1 axis

[0080] L2 axis DETAILED DESCRIPTION

[0081] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0082] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0083] In the description of this embodiment, it should be noted that the terms "upper", "lower", "high", "low", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the invention.

[0084] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0085] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0086] like Figure 1-4As shown, the present invention provides a calendering system 1 for tobacco sheets, which is used for calendering and conveying tobacco material 30 to form tobacco sheets, and the tobacco sheets can be specifically reconstituted tobacco leaves. The tobacco material 30 has a first extension direction A and a second extension direction B, and the calendering system 1 includes a calendering unit 10 and a folding unit 20, the calendering unit 10 includes a first calendering unit 101 and a second calendering unit 102, and the folding unit 20 includes a folding unit 201, the first calendering unit 101 is used to calender the tobacco material 30 along the first extension direction A; the folding unit 201 is used to receive the tobacco material 30 transmitted from the first calendering unit 101 and fold the tobacco material 30; the second calendering unit 102 is used to receive the tobacco material 30 folded by the folding unit 201 and calender the tobacco material 30 along the second extension direction B; the first extension direction A and the second extension direction B intersect.

[0087] If the tobacco material 30 is rolled only in the first extension direction A, the tobacco material 30 will only obtain a high tensile strength in the first extension direction A. At this time, the tensile strength in the first extension direction A is significantly higher than the tensile strength in other directions, making the tensile strength of the tobacco material 30 in various directions unbalanced, and cracks are easily generated in the subsequent further processing steps. Since the tobacco material 30 is in a continuous state during the production process, if cracks occur in one or several sections, it will seriously affect the production of other parts, and manual intervention is required when necessary, reducing production efficiency; in addition, the unbalanced tensile strength will also affect the subsequent shredding step, resulting in more tobacco fragments, causing waste, and reducing the product yield.

[0088] Further, the first extension direction A and the second extension direction B intersect to form a first angle α. By presetting the first angle α, the tobacco material 30 can be calendered in different directions. The first calendering machine group 101 includes a first calendering roller group 1011 for rolling, and the second calendering machine group 102 includes a second calendering roller group 1021 for rolling. After the first calendering roller group 1011 performs a set of calendering, the tobacco material 30 extends along the first extension direction A, and the first extension direction A is, for example, the longitudinal direction. After folding, the tobacco material 30 passes through the second calendering roller group 1021 for two sets of calendering, and the tobacco material 30 extends along the second extension direction B. Since the second extension direction B forms an angle with the first extension direction A, the second extension direction B can be decomposed into a direction component perpendicular to the first extension direction A, that is, a transverse direction relative to the longitudinal direction. Therefore, the tobacco material 30 after being calendered by the first calendering roller group 1011 and the second calendering roller group 1021 is calendered in both the longitudinal and transverse directions, so that the strength can be improved in both the longitudinal and transverse directions. Through experimental tests, it is found that in the process of making tobacco sheets, when the angle between the tobacco material 30 being rolled and extended along the first extension direction A and the second extension direction B is greater than 60 degrees, sufficient transverse strength can be ensured while ensuring longitudinal strength. Further, the first angle α is 60-90 degrees.

[0089] Among them, when the first angle α is 90 degrees, the first extension direction A of the tobacco material 30 for one group of calendering is perpendicular to the second extension direction B for the second group of calendering, that is, the tobacco material 30 is calendered in the longitudinal and transverse directions respectively, so that it can obtain sufficient tensile strength in both the longitudinal and transverse directions.

[0090] Continue to refer Figure 1In each embodiment of the present invention, the first extension direction A and the second extension direction B intersect to form a first angle α, the axis L1 of the first calendering roller group 1011 and the axis L2 of the second calendering roller group 1021 intersect to form a second angle β, and the first angle α is equal to the second angle β. Specifically, the axis of the first calendering roller group 1011 and the axis of the second calendering roller group 1021 intersect, and the tobacco material 30 can be calendered in one group and in two groups in different directions, and the angle between the calendering directions of the first group and the second group is β. The extension directions of the tobacco material 30 after the two groups of calendering are respectively the first extension direction A and the second extension direction B. As mentioned above, the first extension direction A and the second extension direction B intersect to form a first angle α, the first angle α is equal to the second angle β, and the rolling directions of the first calendering roller group 1011 and the second calendering roller group 1021 correspond to the first extension direction A and the second extension direction B respectively. In this embodiment, by changing the calendering direction of the second calendering roller group 1021, the tobacco material 30 is directly rolled in the second extension direction B without turning. The corresponding design of the calendering roller group and the extension direction of the tobacco material 30, the number and direction of the calendering machine groups can be designed according to actual needs.

[0091] like Figure 7 As shown, in other embodiments, taking the first calendering unit 101 as an example, it can include multiple calendering roller groups arranged at intervals, the axes of the multiple calendering roller groups are parallel to each other, and the tobacco material can be calendered multiple times along the first extension direction A. The multiple calendering roller groups can be, for example, three, such as calendering roller group 1011a, calendering roller group 1011b and calendering roller group 1011c, so that the tobacco material is calendered three times along the first extension direction, and then transferred to the folding unit. The second calendering unit 102 can also be provided with multiple parallel calendering roller groups arranged at intervals to calender the tobacco material multiple times along the second extension direction B, for example, three calendering roller groups are provided to calender three times. In this way, the transverse and longitudinal tensile strength of the tobacco sheet can be further strengthened, and the mixing of the various components of the tobacco sheet can be made more sufficient and uniform.

[0092] like Figure 1-5 In each embodiment of the present invention, a folding unit 20 is further provided. The folding unit 20 includes a folding unit 201, which is used to receive the tobacco material 30 transmitted from the first calendering unit 101 and fold the tobacco material 30. The folded material is calendered by the second calendering roller group 1021 and can be extended along the second extension direction B. The folding unit 20 can fold the material along the extension direction of the tobacco material 30 after the previous calendering, so that the tobacco material 30 can smoothly enter between the two rollers of the next calendering roller group and be calendered. For example, referring to Figure 1 , Figure 3 and Figure 5The folding unit 20 folds the tobacco material 30 transmitted from the first calendering unit 101 along the first extension direction A to shorten the length of the tobacco material 30 along the first extension direction A. Further, after being calendered by the second calendering roller group 1021, the tobacco material 30 will extend along the second extension direction B, and then the folding machine can fold the tobacco material 30 transmitted from the second calendering roller group 1021 along the second extension direction B.

[0093] Furthermore, if Figure 1-5 As shown, in the above embodiments, the first calendering unit 101 includes a first calendering roller group 1011 and a first transmission platform 1012, the folding unit 201 includes a folding machine 2011 and a folding transmission platform 2012, the first transmission platform 1012 is used to receive and transmit the tobacco material 30 calendered by the first calendering roller group 1011, so that it enters the folding machine 2011, and the folding machine 2011 folds the tobacco material, and the folding transmission platform 2012 is used to receive and transmit the tobacco material 30 from the folding machine 2011, so that it enters the second calendering unit 102 and is calendered by the two groups. In particular, the first calendering roller group 1011 and the first transmission platform 1012 have a height difference. Due to the characteristics of the tobacco material 30 itself, it will naturally fall down after calendering. Therefore, the tobacco material 30 after the first calendering can fall into the first transmission platform 1012 under the action of its own gravity and start transmission. There is a height difference between the end of the first transmission platform 1012 and the folding machine 2011. Similarly, the tobacco material 30 can also fall into the folding machine 2011 from the end of the first transmission platform 1012 by relying on its own gravity.

[0094] Furthermore, if Figure 3-4 As shown, in the above embodiments, there is also a height difference between the end of the folding conveying platform 2012 and the second calendering unit 102. Under the effect of the height difference and the gravity of the tobacco material 30 itself, the tobacco material 30 can fall from the end of the folding conveying platform 2012 into the second calendering unit 102.

[0095] The height difference setting utilizing the characteristics of tobacco materials enables tobacco materials to automatically enter the unit and be processed under the action of the unit without manual intervention, thus realizing automated production, saving manpower and further improving production efficiency.

[0096] Since there needs to be a height difference between the first calendering roller group 1011, the first transmission platform 1012, the folding machine 2011, the folding transmission platform 2012, and the second calendering machine group 102, the calendering system needs to extend more in the vertical direction and occupy more space in the vertical direction.

[0097] Therefore, if Figure 8a-8cAs shown, in the above embodiments, the first transmission platform 1012 includes at least one first inclined transmission surface 1013, and the height of the first inclined transmission surface 1013 relative to the horizontal plane gradually increases along the transmission direction C, so as to lift the tobacco material and then drop it into the folding machine 2011. If the height difference between the folding machine 2011 and the end 1014 of the first transmission platform 1012 is fixed, when the first transmission platform 1012 is lifted, compared with the horizontal setting of the first transmission platform 1012, the setting position of the folding machine 2011 can be higher, which makes up for the space required for setting the height difference, and the entire calendering system is compressed in the vertical direction, and the space occupied in the vertical direction is smaller. Further, the tobacco material after being calendered by the first calendering roller group 1011 falls into the first inclined transmission surface 1013, that is, one end of the first inclined transmission surface 1013 extends in the opposite direction of the transmission direction C to the material drop position after the tobacco material is calendered by the first calendering roller group 1011, and the other end extends along the transmission direction C to the end 1014 of the first transmission platform 1012, so that the setting position of the first calendering roller group 1011 can be lower. Further, one end of the first inclined transmission surface 1013 extends to the bottom of the first calendering roller group 1011, and the other end extends to the end 1014 of the first transmission platform 1012.

[0098] Specifically, in a specific embodiment of the present invention, a portion of the first transmission platform 1012 is a first inclined transmission surface 1013, and the remaining portion 1015 is still horizontal. Figure 8b Compared to Figure 8a The first transmission platform 1012 is completely horizontally arranged, the position of the folding machine 2011 is significantly raised, and the distance between the folding machine 2011 and the first calendering roller group 1011 in the vertical direction is shortened, that is, Figure 8b The median distance d2 is less than Figure 8a The distance d1 in (based on the height of the center of the first calendering roller group 1011 and the folding machine 2011).

[0099] In another specific embodiment of the present invention, the first transmission platform 1012 is a first inclined transmission surface 1013, which gradually rises from the initial end to the end. Figure 8c As shown, the height difference between the first calendering roller set 1011 and the first transmission platform 1012 is fixed, so when the first transmission platform 1012 is the first inclined transmission surface 1013 as a whole, the first calendering roller set 1011 can be set lower. Figure 8a and Figure 8b, the distance d3 between the first calendering roller group 1011 and the folding machine 2011 in the vertical direction is less than d2 (based on the height of the center of the first calendering roller group 1011 and the folding machine 2011). The calendering roller group and the folding machine are relatively complex in structure and large in size, and the vertical space occupied by both is relatively large. By setting the first transmission platform 1012 as a whole as the first inclined transmission surface 1013, the distance between the first calendering roller group 1011 and the folding machine 2011 in the vertical direction can be further reduced, and the space occupied by the entire calendering system in the vertical direction can be effectively reduced. The existing transmission platform can be directly used. It is only necessary to set the existing transmission platform in a manner inclined relative to the horizontal plane so that the end of the transmission platform is raised relative to the horizontal position. In addition, if Figure 8b and Figure 8c As shown, when the same space is compressed in the vertical direction, when the first transmission platform 1012 is a first inclined transmission surface as a whole, the slope of the first inclined transmission surface can be smaller, so there is no need to lift the material too high, and the kinetic energy required for transmission will also be reduced.

[0100] Furthermore, if Figure 3-4 As shown, the folding transmission platform 2012 may also include at least one inclined folding transmission surface 2013, and the height of the inclined folding transmission surface 2013 relative to the horizontal plane along the transmission direction is gradually increased to lift the tobacco material and drop it into the second calendering unit 102. If the height difference between the second calendering unit 102 and the end of the folding transmission platform 2012 is fixed, when the folding transmission platform 2012 is lifted, compared with the horizontal setting of the folding transmission platform 2012, the setting position of the second calendering unit 102 can be higher, which makes up for the space required for setting the height difference, and the entire calendering system is compressed in the vertical direction, and the space occupied in the vertical direction is smaller. Further, the tobacco material folded by the folding machine 2011 falls into the inclined folding transmission surface 2013, that is, one end of the inclined folding transmission surface 2013 extends in the opposite direction of the transmission direction to the material drop position of the tobacco material after being folded by the folding machine 2011, and the other end extends in the transmission direction to the end of the folding transmission platform 2012, so that the setting position of the folding machine 2011 can be lower. Furthermore, one end of the inclined folding and conveying surface 2013 extends to the bottom of the folding machine 2011 , and the other end extends to the end of the folding and conveying platform 2012 .

[0101] In another specific embodiment of the present invention, the folding transmission platform 2012 is an inclined folding transmission surface 2013 as a whole, which gradually rises from the initial end to the end, further reducing the distance between the folding machine 2011 and the second calendering unit 102 in the vertical direction, effectively reducing the space occupied by the entire calendering system in the vertical direction, and can directly use the existing transmission platform, just need to set the existing transmission platform in an inclined manner relative to the horizontal plane, so that the end of the transmission platform is raised relative to the horizontal position. In the case of compressing the same space in the vertical direction, when the folding transmission platform 2012 is an inclined folding transmission surface 2013 as a whole, the slope of the inclined folding transmission surface 2013 can be smaller, so there is no need to lift the material too high, and the kinetic energy required for transmission will also be reduced.

[0102] Since the tobacco material is automatically transferred from the calendering unit to the folding unit and then to the next calendering unit by falling, the height of the first calendering unit is higher than the height transmitted to the next folding unit, and the height of the folding unit is also higher than the second calendering unit. The first transmission platform and the folding transmission platform are both arranged to have an inclined surface that rises in height along the transmission direction, thereby effectively reducing the height dimension of the entire calendering system.

[0103] In particular, if the calendering unit includes a plurality of calendering roller groups that are spaced apart and have parallel axes, each calendering roller group may also have a certain height difference to facilitate the material to automatically enter the next roller group. Accordingly, the transmission platform in each calendering unit may be inclined, as described above. If the plurality of calendering roller groups are not provided with a height difference, the material may also be guided manually.

[0104] like Fig. 9 As shown, in a specific embodiment, the folding machine 2011 may include a double-rod guide 2014 and a push-pull mechanism 2015. The double-rod guide 2014 has a width direction (eg Figure 1 , Fig. 9 In the embodiment, the width direction D is in the same direction as the first extension direction A) and the first rod 2014a and the second rod 2014b are arranged relatively spaced apart. Figure 4 , Figure 5, the tobacco material is calendered by the first roller group 1011 and then transmitted by the first transmission platform 1012. When the tobacco material is transmitted to the end of the first transmission platform 1012, the tobacco material falls down and falls into the interval between the first rod 2014a and the second rod 2014b. Then the first rod 2014a and the second rod 2014b clamp the tobacco material and fold the tobacco material. The folded tobacco material is further transmitted by the folding transmission platform 2012. The first transmission platform 1012 can continuously transmit the calendered tobacco material, so folding can also be carried out continuously. In addition, the folding machine 211 can also include a chute 2016, which serves as a track for the movement of the material guide double rod 2014. The material guide double rod 2014 moves back and forth in the chute 2016 along the width direction under the drive of the push-pull mechanism 2015, and the tobacco material is folded back and forth.

[0105] Continue to refer Fig. 9 In the above embodiment, the first rod 2014a and the second rod 2014b are respectively provided with photoelectric sensing devices 2017 arranged opposite to each other in the width direction, and the photoelectric sensing devices 2017 are located at the material guiding entrance of the material guiding double rods 2014. When the tobacco material falls into the gap between the material guiding double rods 2014, the photoelectric sensing devices 2017 can sense the falling of the tobacco material, and the first rod 2014a and the second rod 2014b can approach and clamp the tobacco material, and move back and forth in the width direction to fold the tobacco material; when the first transmission platform 1012 no longer transmits the calendered tobacco When the tobacco material is not sensed by the photoelectric sensing device 2017, the first rod 2014a and the second rod 2014b stop moving back and forth, move away from each other in the width direction and return to the initial state. At this time, the interval between the first rod 2014a and the second rod 2014b is larger than when the tobacco material is clamped, so that the tobacco material can fall smoothly between the two rods when the material is received next time. After that, the first rod 2014a and the second rod 2014b move to the clamping position along the chute 2016 again, and the falling tobacco material can also be guided to the preset falling position and folded on the folding transmission platform 2012. Such a setting can further reduce the intervention of manpower and realize the automation of the folding process. The sensing device of the present invention is not limited to the photoelectric sensing device, and other sensing devices can also be applied to the present invention. In the present embodiment, the photoelectric sensing device 2017 is a pair, which is respectively arranged on the first rod 2014a and the second rod 2014b.

[0106] The folding unit 201 of the above-mentioned embodiments may further include a shaping roller 2018 for squeezing and flattening the folded tobacco material along both ends perpendicular to the folding direction, for example Figure 1 The shaping rollers 218 are arranged at both ends of the folding and conveying platform in the folding and conveying direction E. The shaping rollers 218 can be arranged independently of the folding machine 211, or can be connected to the folding machine 211, such as Fig. 9As shown. The two ends of the folded tobacco material are higher than the other parts of the tobacco material, so the two ends need to be shaped and flattened in advance so that the folded tobacco material can smoothly enter the second calendering roller group 1021 to avoid the two ends being blocked at the entrance of the second calendering roller group 1021. In addition to squeezing the two ends, the shaping roller 2018 can also exert a certain squeezing effect on the rest of the tobacco material, reducing the gap between the upper and lower layers of tobacco material in the folding area, making it easier for the tobacco material to enter the second calendering roller group 1021. In a specific embodiment, the shaping roller 2018 is made of a large-diameter thin-walled pipe, and a larger area can be flattened in one rotation. The shaping roller 2018 is cylindrical, and its axial direction is consistent with the width direction of the folded tobacco material. Figure 1 Its axial length L is greater than the width d of the folded tobacco material, ensuring that it can cover the entire width of both ends of the tobacco material 30 and achieve effective squeezing of the two ends of the tobacco material 30.

[0107] In other embodiments, Fig.10 The shaping roller 2018 is shown to be independent of the folding machine. The shaping roller 2018 is arranged on a frame 2019, located above the folding and conveying platform 2012, and the shaping roller 2018 is controlled to work by a driving motor and a reducer 2021. The frame 2019 may also be provided with a shaping roller height adjustment device, such as a height adjustment turbine screw 2020, for adjusting the height of the shaping roller 2018, so as to adapt to different folded tobacco material thicknesses and achieve a more adequate shaping effect. In this way, the material is transmitted along the folding transmission direction E to the end of the folding transmission platform 2012, and the shaping roller 2018 rotates along the rotation direction F. The motor frequency is adjusted to make the tangential linear velocity of the surface of the shaping roller 2018 consistent with the transmission speed of the folding transmission platform 2012 below, so that only pressure is applied to the folded tobacco material without causing interlayer slippage of the folded tobacco material. When the tobacco material passes through the shaping roller 2018, both ends of the material are flattened by the shaping roller 2018 and then enter the calendering unit (not shown in the figure).

[0108] In the above embodiments, the calendering unit may include N groups of calendering units, including a first calendering unit, a second calendering unit to an Nth calendering unit, wherein N is a positive integer greater than or equal to 3; the first calendering unit to the Nth calendering unit are arranged in sequence along the transmission direction of the entire calendering system, and are used to calender the tobacco material N times, and calender the tobacco material alternately along the first extension direction and the second extension direction. The folding unit includes a plurality of folding units, and the folding units are respectively arranged between two adjacent calendering units along the transmission direction of the entire calendering system, and are used to fold the tobacco material transmitted from the previous calendering unit and transmit it to the next calendering unit. Through this arrangement, the tobacco material can be repeatedly calendered in the first extension direction and the second extension direction, and the longitudinal tensile strength and the transverse tensile strength of the tobacco sheet are further balanced, so that the tobacco sheet can obtain the desired processing performance. Furthermore, each calendering unit may include a plurality of calendering roller groups which are spaced apart and have parallel axes. Each calendering unit performs a group of calendering on the tobacco material, and each group of calendering includes calendering the tobacco material multiple times in the same extension direction.

[0109] In another embodiment of the present invention, multiple calendering units and multiple folding units can be set, and calendering unit-folding unit-calendering unit-folding unit... calendering units are sequentially set along the moving line of the transmission direction of the entire calendering system, including N groups of calendering units and N-1 groups of folding units. Figure 6 As shown, after the tobacco material 30 is mixed and extruded, it passes through the calendering unit 101, the folding unit 201, the calendering unit 102, the folding unit 202, the calendering unit 103, the folding unit 203, the calendering unit 104, the folding unit 204, and the calendering unit 105 in sequence according to the transmission direction G of the entire calendering system. After multiple calendering and folding, the transverse and longitudinal tensile strengths are fully enhanced, and the raw materials of the tobacco sheets can also be fully mixed.

[0110] Similarly, in order to realize the automation of blanking and incoming materials, a certain height difference can be set between the units, and the transmission platform of each unit can be set as an inclined plane to reduce the space occupied by the system in the vertical direction.

[0111] The folding machine is used to fold the tobacco material calendered by the previous calendering unit along the previous extension direction, and the previous extension direction is the direction in which the tobacco material is extended after being calendered by the previous calendering unit.

[0112] The present invention also proposes a calendering method for tobacco sheets, which uses the calendering systems of the above-mentioned embodiments to calender the tobacco sheets, including the following steps: a group of calendering: calendering the tobacco material along a first extension direction; folding: folding the tobacco material; a second group of calendering: calendering the folded tobacco material along a second extension direction; wherein the first extension direction and the second extension direction intersect.

[0113] Before one set of calendering steps, the method further includes uniformly mixing the raw materials of the tobacco slices to form the material to be calendered. After the second set of calendering steps, the method further includes drying, shredding and packing the slices. The first set of calendering steps may include calendering the tobacco material multiple times along the first extension direction, and the second set of calendering steps may also be arranged to calender multiple times along the second extension direction.

[0114] In the method, the folding step is performed by a folding unit, and the tobacco material is lifted after a first calendering step and falls into the folding unit before the folding step. In particular, the folding step can be a back-and-forth folding step. Then, the second calendering step is performed by a second calendering unit, and the tobacco material is lifted after the folding step and falls into the second calendering unit before the second calendering step.

[0115] Preferably, the folding step further comprises pressing and flattening the folded tobacco material at both ends perpendicular to the folding direction.

[0116] In addition, the calendering method further includes performing N groups of calendering on the tobacco material, wherein N is a positive integer greater than or equal to 3; the N groups of calendering are to alternately calender the tobacco material along the first extension direction and the second extension direction; and a folding step is further included between two adjacent groups of calendering. Each group of calendering may also include multiple calendering along the first extension direction or the second extension direction.

[0117] The folding unit folds the previous group of calendered tobacco materials along the previous extension direction, where the previous extension direction is the direction in which the previous group of calendered tobacco materials are extended.

[0118] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A tobacco sheet calendering system, characterized in that: Used to calender and transfer tobacco material to form tobacco sheets, the tobacco material has a first extension direction and a second extension direction, the calendering system includes a calendering unit and a folding unit, the calendering unit includes a first calendering unit and a second calendering unit, the folding unit includes a folding unit, the first calendering unit is used to calender the tobacco material along the first extension direction; the folding unit is used to receive the tobacco material transferred from the first calendering unit and fold the tobacco material; the second calendering unit is used to receive the tobacco material folded by the folding unit and calender the tobacco material along the second extension direction; The first extension direction and the second extension direction intersect.

2. The calendering system according to claim 1, characterized in that: The first extension direction and the second extension direction intersect to form a first angle, and the first angle is 60-90 degrees.

3. The calendering system according to claim 1, characterized in that: The first extension direction and the second extension direction intersect to form a first angle, the first calendering unit includes a first calendering roller group for rolling, the second calendering unit includes a second calendering roller group for rolling, the axis of the first calendering roller group and the axis of the second calendering roller group intersect to form a second angle, and the first angle is equal to the second angle.

4. The calendering system according to claim 1, characterized in that: The first calendering unit includes a plurality of calendering roller groups arranged at intervals, the axes of the plurality of calendering roller groups arranged at intervals are parallel to each other, and are used to perform multiple calendering on the tobacco material along the first extension direction. The second calendering unit includes a plurality of calendering roller groups arranged at intervals, the axes of the plurality of calendering roller groups arranged at intervals are parallel to each other, and are used to perform multiple calendering on the tobacco material along the second extension direction.

5. The calendering system according to claim 1, characterized in that: The first calendering unit includes a first calendering roller group and a first conveying platform. The first conveying platform is used to receive and convey the tobacco material calendered by the first calendering roller group. The tobacco material falls into the folding unit from the end of the first conveying platform. The first conveying platform includes at least one first inclined conveying surface. The height of the inclined conveying surface relative to the horizontal plane gradually increases along the conveying direction, so as to lift the tobacco material and let it fall into the folding unit.

6. The calendering system according to claim 5, characterized in that: The tobacco material calendered by the first calendering roller group falls onto the first inclined conveying surface, and the first inclined conveying surface extends to the end of the first conveying platform along the conveying direction.

7. The calendaring system according to claim 5, characterized in that: The first transmission platform is the first inclined transmission surface.

8. The calendaring system according to claim 1, characterized in that: The folding unit includes a folding machine and a folding transmission platform, the folding machine is used to fold the tobacco material from the first calendering unit, the folding transmission platform is used to receive and transmit the tobacco material from the folding machine, the tobacco material falls from the end of the folding transmission platform into the second calendering unit, the folding transmission platform includes at least one inclined folding transmission surface, and the height of the inclined folding transmission surface relative to the horizontal plane gradually increases along the transmission direction, so as to lift the tobacco material and then let it fall into the second calendering unit.

9. The calendaring system according to claim 8, characterized in that The tobacco material after passing through the folding machine falls onto the inclined folding conveying surface, and the inclined folding conveying surface extends along the conveying direction to the end of the folding conveying platform.

10. The calendaring system according to claim 8, characterized in that The folding transmission platform is the inclined folding transmission surface.

11. The calendaring system according to claim 1, characterized in that: The folding unit includes a folding machine and a folding transmission platform. The folding machine is used to fold the tobacco material from the first calendering unit, and includes a double material guiding rod and a push-pull mechanism. The double material guiding rod has a first rod and a second rod that are relatively spaced apart along the width direction. The tobacco material transmitted from the first calendering unit passes through the space between the first rod and the second rod and is guided to the folding transmission platform. The push-pull mechanism is used to drive the double material guiding rod to move back and forth along the width direction to fold the tobacco material.

12. The calendaring system according to claim 11, characterized in that The tobacco material from the first calendering unit falls into the gap between the first rod and the second rod, and the folding is a reciprocating folding.

13. The calendaring system according to claim 11, characterized in that The first rod and the second rod are respectively provided with photoelectric sensing devices arranged relatively along the width direction, and the photoelectric sensing devices are located at the material guiding entrance of the double material guiding rods. When the photoelectric sensing devices sense that the tobacco material falls in, the first rod and the second rod approach from an initial state along the width direction to form a clamping space, and move back and forth along the width direction; when the photoelectric sensing devices cannot sense the tobacco material, the first rod and the second rod move away from each other along the width direction and return to the initial state, and stop moving back and forth.

14. The calendaring system according to claim 1, characterized in that: The folding unit comprises a shaping roller, which is used to squeeze and flatten the folded tobacco material along two ends perpendicular to the folding direction.

15. The calendaring system according to claim 1, characterized in that: The first calendering unit includes a first calendering roller group and a first transmission platform, the first transmission platform is used to receive and transmit the tobacco material calendered by the first calendering roller group, the second calendering unit includes a second calendering roller group and a second transmission platform, the second transmission platform is used to receive and transmit the tobacco material calendered by the second calendering roller group, the transmission direction of the first transmission platform is consistent with the calendering direction of the first calendering roller group, and the transmission direction of the second transmission platform is consistent with the calendering direction of the second calendering roller group.

16. The calendering system according to any one of claims 1 to 15, characterized in that: The calendering unit includes N groups of calendering groups, including the first calendering group, the second calendering group to the Nth calendering group, wherein N is a positive integer greater than or equal to 3; the first calendering group to the Nth calendering group are arranged in sequence along the transmission direction of the entire calendering system, and are used to perform N groups of calendering on the tobacco material, and alternately calender the tobacco material along the first extension direction and the second extension direction; the folding unit includes a plurality of folding groups, and the folding groups are respectively arranged between two adjacent calendering groups along the transmission direction of the entire calendering system, and are used to fold the tobacco material transmitted from the previous calendering group and transmit it to the next calendering group.

17. The calendaring system according to claim 16, characterized in that The folding machine is used to fold the tobacco material calendered by the previous calendering unit along the previous extension direction, and the previous extension direction is the direction in which the tobacco material is extended after being calendered by the previous calendering unit.

18. A method for calendering tobacco sheets, characterized in that: The steps include: A group of calendering: calendering the tobacco material along a first extension direction; Folding: folding the tobacco material; Second group calendering: calendering the folded tobacco material along the second extension direction; Wherein, the first extension direction and the second extension direction intersect.

19. The calendering method according to claim 18, characterized in that The first set of calendering steps includes calendering the tobacco material multiple times along the first extension direction, and the second set of calendering steps includes calendering the tobacco material multiple times along the second extension direction.

20. The calendering method according to claim 18, characterized in that The folding step is performed by a folding unit, and the tobacco material is lifted after the group of calendering steps and falls into the folding unit to perform the folding step.

21. The calendering method according to claim 18, characterized in that The two calendering steps are performed by a second calendering unit, and the tobacco material is lifted after the folding step and falls into the second calendering unit to perform the two calendering steps.

22. The calendering method according to claim 18, characterized in that The folding step is to fold the tobacco material back and forth.

23. The calendering method according to claim 18, characterized in that The folding step also includes squeezing and flattening the folded tobacco material at both ends perpendicular to the folding direction.

24. The calendering method according to claim 18, characterized in that It also includes N groups of calendering on the tobacco material, wherein N is a positive integer greater than or equal to 3; the N groups of calendering are to alternately calender the tobacco material along the first extension direction and the second extension direction; and the folding step is also included between two adjacent groups of calendering.

25. The calendering method according to claim 24, characterized in that The folding step folds the tobacco material after the previous group of calendering along the previous extension direction, and the previous extension direction is the direction in which the tobacco material is extended after the previous group of calendering.

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