Coating roller for coating tobacco sheets and reconstituted tobacco coating machine

Abstract

The coating roller for coating the tobacco sheets comprises a roller body, the surface of the roller body is wrapped with a covering layer, micropores are evenly formed in the covering layer, and the diameter of each micropore is 0.2 mm-0. 8 mm. A large number of micropores are evenly formed in the surface of the coating roller, coating liquid can be temporarily stored in the micropores in the coating process, when the content of the coating liquid on a tobacco substrate is higher than a target value, the micropores can absorb redundant coating liquid, and when the content of the coating liquid on the substrate is lower than the target value, the coating liquid in the micropores can be supplemented to the substrate. Therefore, the content of the coating liquid on the tobacco substrate is adjusted, the coating liquid on the substrate is stabilized within a certain range all the time, the coating uniformity of the reconstituted tobacco can be effectively improved, the adhesion and caking risk of the reconstituted tobacco is reduced, and the water absorption uniformity and the shredding efficiency of the reconstituted tobacco in the cigarette processing process are improved. The utility model further provides a reconstituted tobacco coating machine, and the reconstituted tobacco coating machine also has the above beneficial effects.

Description

Technical Field

[0001] The present application relates to the technical field of coating equipment for reconstituted tobacco by the papermaking method, and particularly to a coating roller for coating tobacco sheet and a reconstituted tobacco coater. Background Art

[0002] Reconstituted tobacco is an advanced tobacco production process that makes tobacco sheet from tobacco fragments, tobacco dust, tobacco stems, etc. Therefore, reconstituted tobacco is also called tobacco sheet. The manufacturing methods of reconstituted tobacco mainly include the roll pressing method, the thick slurry method, and the papermaking method. Among them, the papermaking method for reconstituted tobacco can improve the utilization rate of tobacco, change the chemical components in tobacco during the processing, reasonably allocate and control the chemical components of tobacco, reduce the harmful components in tobacco, thereby reducing the tar content in cigarettes and improving the internal quality of cigarettes. At the same time, tobacco sheet has the advantages of being easy to transport and store for a long time. Therefore, the technology of processing tobacco sheet by the papermaking method has been widely used.

[0003] The production process of reconstituted tobacco by the papermaking method utilizes the physical properties of tobacco raw materials. First, formulation, extraction, and solid-liquid separation are carried out; then, the soluble liquid is further evaporated and concentrated to extract tobacco components to make a coating liquid, and for the insoluble tobacco raw materials, they are disintegrated and ground into pulp, and then dehydrated, dried, and made into sheets by papermaking technology to obtain a tobacco base sheet; finally, the prepared coating liquid is coated on the tobacco base sheet, and after drying and tearing, it is made into tobacco sheet according to technical requirements.

[0004] It can be seen that the papermaking method for reconstituted tobacco process generally includes processes such as extraction, pulping, coating, etc. Among them, the role of the coating process is to make the coating liquid containing tobacco substances fully infiltrate the tobacco base sheet, and the infiltration effect directly affects the quality of the product. An important parameter affecting the infiltration effect of the tobacco base sheet is the coating uniformity of the coating liquid on the tobacco base sheet. The coating uniformity directly determines the ratio of tobacco effective components in the reconstituted tobacco. Generally, the more uniform the coating, the more tobacco aroma components; at the same time, higher coating uniformity can reduce the production cost of enterprises, thereby improving the economic benefits of enterprises.

[0005] Therefore, how to improve the coating uniformity of the coating liquid on the tobacco base sheet is a technical problem that those skilled in the art need to solve urgently. Utility Model Content

[0006] To solve the above technical problems, the present application provides a coating roller for coating tobacco sheet and a reconstituted tobacco coater, which can adjust the amount of the coating liquid on the tobacco base sheet during the coating process, thereby improving the coating uniformity of the coating liquid on the tobacco base sheet, and further helping to reduce the risk of mutual adhesion and caking during the storage of reconstituted tobacco, and also being beneficial to stabilizing the water absorption uniformity of reconstituted tobacco during the cigarette production process and improving the cutting efficiency of reconstituted tobacco.

[0007] The technical solution provided by this application is as follows:

[0008] A coating roller for coating tobacco sheet, comprising a roller body, the surface of the roller body is wrapped with a covering layer, and micropores are uniformly arranged on the covering layer, and the diameter of the micropores is 0.2 mm to 0.8 mm.

[0009] Further, the depth of the micropores is 1 mm to 5 mm.

[0010] Further, the distance between adjacent micropores is 0.1 mm to 1 mm.

[0011] Further, the thickness of the covering layer is 3 mm to 10 mm.

[0012] Further, the covering layer is made of hard rubber.

[0013] Further, the micropores on the covering layer are arranged in rows or columns, and the micropores in adjacent two rows or two columns are arranged in a staggered manner.

[0014] Further, the roller body includes a central shaft and a roller tube fixedly sleeved on the central shaft, and the covering layer is wrapped on the surface of the roller tube.

[0015] Further, the central shaft and the roller tube are integrally formed.

[0016] Further, the covering layer is fixed on the surface of the roller tube by an adhesive bonding method.

[0017] A reconstituted tobacco coating machine, comprising two coating rollers for coating tobacco sheet as described above, which are arranged parallel and opposite to each other.

[0018] For the coating roller and the reconstituted tobacco coating machine for coating tobacco sheet provided by the present utility model, during use, the two coating rollers are arranged in parallel, and the substrate to be coated passes through between the two coating rollers. By adjusting the distance between the two pressure rollers, the extrusion force of the coating roller on the substrate to be coated can be adjusted, so as to determine the target value of the coating liquid content on the substrate. During the actual coating process, the coating liquid content at each part of the substrate may be uneven. Since a large number of micropores are uniformly arranged on the surface of the coating roller, the micropores can temporarily store the coating liquid during the coating process. When the coating liquid content on the tobacco substrate is higher than the target value, the micropores can absorb the excess coating liquid, and when the coating liquid content on the substrate is lower than the target value, the coating liquid in the micropores can be supplemented to the substrate, so as to realize the adjustment of the coating liquid content on the tobacco substrate, make the coating liquid on the substrate always stable within a certain range, effectively improve the uniformity of the reconstituted tobacco coating, reduce the risk of adhesion and caking of the reconstituted tobacco, and improve the water absorption uniformity and cutting efficiency of the reconstituted tobacco during the cigarette processing process. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural view of a coating roller for coating tobacco sheet in an embodiment of the present application;

[0021] Figure 2 It is a schematic structural view of the covering layer of the coating roller for coating tobacco sheet in an embodiment of the present application after being unfolded.

[0022] Reference numerals: covering layer 1, micropores 2, central shaft 3, roller barrel 4. Detailed Description of the Embodiments

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0026] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more such features. In the description of this application, the meanings of "a plurality of" and "several" are two or more, unless otherwise specifically defined.

[0027] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementable conditions of this application. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0028] As Figure 1 and Figure 2 shown, an embodiment of this application provides a coating roller for coating tobacco sheet, which includes a roller body. A covering layer 1 is wrapped on the surface of the roller body. Micropores 2 are uniformly arranged on the covering layer 1, and the diameter of the micropores 2 is 0.2 mm to 0.8 mm.

[0029] The coating roller for coating tobacco sheet provided in this embodiment is in a cylindrical shape. The covering layer 1 on the surface of the roller body is made of a material with high hardness and stable chemical properties. A large number of micropores 2 are uniformly arranged on the surface of the coating roller. During the coating operation, the tobacco substrate to be coated passes through between two coating rollers. The circumferential surfaces of the two coating rollers respectively exert extrusion on the substrate, so that the coating liquid covering the circumferential surfaces of the two coating rollers fully penetrates into the interior of the substrate under the action of external force, improving the penetration efficiency and effect of the coating liquid. The micropores 2 can temporarily store a certain amount of coating liquid during the coating extrusion process. When the content of the coating liquid on the tobacco substrate is higher than the target value, the micropores 2 can absorb the excess coating liquid. When the content of the coating liquid on the substrate is lower than the target value, the coating liquid in the micropores 2 can be supplemented to the substrate, thereby realizing the adjustment of the content of the coating liquid on the tobacco substrate, making the coating liquid on the substrate always stable within a certain range, and effectively improving the uniformity of the coating of the coating liquid on the reconstituted tobacco leaves. When the coating of the coating liquid on the substrate is uneven, there is also an easy problem of adhesion and caking in the places where the content of the coating liquid on the substrate is relatively high. Therefore, this embodiment can effectively improve the coating uniformity of the coating liquid on the tobacco substrate, and further reduce the risk of adhesion and caking of the reconstituted tobacco leaves, improving the water absorption uniformity and cutting efficiency of the reconstituted tobacco leaves during the cigarette processing process.

[0030] In order to better adjust the coating liquid content on the tobacco substrate by the micro-holes 2, in this embodiment, the depth of the micro-holes 2 is 1 mm to 5 mm. The micro-holes 2 have an appropriate depth so that the micro-holes 2 can both absorb and temporarily store the coating liquid, and it is also convenient for the coating liquid in the micro-holes 2 to be replenished and coated onto the substrate. Preferably, the distance between adjacent micro-holes 2 is 0.1 mm to 1 mm. A plurality of micro-holes 2 are evenly arranged on the coating roller, and there is an appropriate distance between the micro-holes 2, which helps to evenly adjust the content of the coating liquid on the substrate, enables the coating liquid to be evenly distributed on the substrate, and improves the uniformity of substrate coating. More preferably, the micro-holes 2 on the covering layer 1 are arranged in rows or columns, and the adjacent two rows or two columns of micro-holes 2 are arranged in a staggered manner.

[0031] Preferably in this embodiment, the thickness of the covering layer 1 is 3 mm to 10 mm. The thickness of the covering layer 1 not only meets the depth of the micro-holes 2 but also enables the covering layer 1 to have a certain strength so that the covering layer 1 will not be damaged when pressing the substrate.

[0032] In this embodiment, the covering layer 1 is made of hard rubber. The hard rubber covering layer 1 has the characteristics of high density, large hardness, heat resistance, and chemical corrosion resistance.

[0033] Specifically in this embodiment, the roller body includes a central shaft 3 and a roller barrel 4 fixedly sleeved on the central shaft 3, and the covering layer 1 is wrapped on the surface of the roller barrel 4. The two ends of the central shaft 3 of the roller body are convenient for installation on the machine frame, and the roller barrel 4 is fixedly sleeved outside the central shaft 3 so that the roller barrel 4 can press the substrate. Preferably, the central shaft 3 and the roller barrel 4 are integrally formed.

[0034] In order to fixedly wrap the covering layer 1 on the outer surface of the roller body, in this embodiment, the covering layer 1 is fixed on the surface of the roller barrel 4 by an adhesive bonding method. A viscous substance such as an adhesive is used between the covering layer 1 and the surface of the roller barrel 4 to tightly bond the covering layer 1 to the surface of the roller barrel 4, and during use, the covering layer 1 can be prevented from peeling off from the roller barrel 4.

[0035] The covering layer 1 can also be fixed on the surface of the roller barrel 4 by other means. Fixing members (not shown in the figure) are respectively arranged at both ends of the roller barrel 4, and the fixing members are used to fix both ends of the covering layer 1 on the roller barrel 4. Specifically, the circumferential direction of the covering layer 1 along the roller barrel 4 is the length of the covering layer 1, and the axial direction of the covering layer 1 along the roller barrel 4 is the width of the covering layer 1. The covering layer 1 is wound and wrapped on the roller barrel 4, the width of the covering layer 1 is slightly larger than the length of the roller barrel 4, the covering layer 1 is folded in the radial direction of the roller barrel 4 at the end of the roller barrel 4, and the fixing members are detachably installed at the end of the roller barrel 4 to fix the covering layer 1, thereby fixing the covering layer 1 at both ends of the roller barrel 4 on the end of the roller barrel.

[0036] This embodiment also provides a reconstituted tobacco coater, which includes two coating rollers for coating tobacco sheets as described above and arranged parallel to each other. The coater further includes a frame, and the two coating rollers are installed on the frame with their axes arranged parallel to each other. There is a certain gap between the circumferential surfaces of the two coating rollers, and the gap is slightly smaller than the thickness of the substrate to be coated, so that when the substrate passes through the gap between the coating rollers, the circumferential surfaces of the two coating rollers can respectively form extrusion on the substrate. This reconstituted tobacco coater can be used to coat a coating liquid on the surface of an article, such as coating a coating liquid on the surface of paper products, fabric products, etc., for example, coating a coating liquid containing active ingredients extracted from tobacco stems and tobacco dust on the reconstituted tobacco substrate in the production process of reconstituted tobacco by the papermaking method. This reconstituted tobacco coater includes the coating rollers for coating tobacco sheets as described above, and also has the above beneficial effects of the coating rollers for coating tobacco sheets. It can adjust the content of the coating liquid on the tobacco substrate during the coating process, thereby improving the uniformity of the coating of the coating liquid on the tobacco substrate, further helping to reduce the risk of mutual adhesion and caking during the storage of reconstituted tobacco, and also being beneficial to stabilizing the water absorption uniformity of reconstituted tobacco during the cigarette production process and improving the cutting efficiency of reconstituted tobacco.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coating roller for coating tobacco sheets, characterized in that: It comprises a roller body, the surface of which is wrapped with a covering layer, micropores are evenly arranged on the covering layer, and the diameter of the micropores is 0.2mm-0.8mm.

2. The coating roller for coating tobacco sheets according to claim 1, characterized in that: The depth of the micropores is 1 mm to 5 mm.

3. The coating roller for coating tobacco sheets according to claim 1, characterized in that: The distance between adjacent microholes is 0.1 mm to 1 mm.

4. The coating roller for coating tobacco sheets according to claim 1, characterized in that: The thickness of the covering layer is 3 mm to 10 mm.

5. The coating roller for coating tobacco sheets according to claim 4, characterized in that: The cover layer is made of hard rubber.

6. The coating roller for coating tobacco sheets according to claim 3, characterized in that: The micropores on the cover layer are arranged in rows or columns, and the micropores in two adjacent rows or columns are staggered.

7. The coating roller for coating tobacco sheets according to any one of claims 1 to 6, characterized in that: The roller body comprises a central axis and a roller fixedly sleeved on the central axis, and the covering layer is wrapped around the surface of the roller.

8. The coating roller for coating tobacco sheets according to claim 7, characterized in that: The central shaft and the roller are integrally formed.

9. The coating roller for coating tobacco sheets according to claim 7, characterized in that: The covering layer is fixed on the surface of the roller by gluing.

10. A reconstituted tobacco leaf coating machine, characterized in that: The invention comprises two coating rollers for coating tobacco sheets as claimed in any one of claims 1 to 9 which are arranged in parallel and opposite to each other.

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