Method for comprehensively controlling cone falling tendency of cigarette
By adjusting indicators such as tobacco width, filling value, moisture content, structure, air permeability, ash content, and combustion aid content, combined with flexible tobacco breakage and online detection, the problems of cigarette combustion cone tilting and falling off were solved, and the stability and mechanical strength of the combustion cone were improved.
Patent Information
- Application Number
- CN202510997580.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-19
- Publication Date
- 2025-11-18
AI Technical Summary
Existing technologies cannot effectively control the tilting and detachment of the cigarette combustion cone, which affects the brand recognition of cigarettes, especially in slim and medium-sized cigarettes.
By adjusting multiple key indicators such as tobacco width, filling value, moisture content, structure, air permeability, ash content, combustion aid content, and cigarette density, combined with flexible tobacco breakage and online detection devices, comprehensive control of the cigarette combustion cone tendency can be achieved.
It effectively reduces the phenomenon of combustion cone detachment during cigarette smoking, improves product quality and brand recognition, and ensures the stability and mechanical strength of the combustion cone.
Smart Images
Figure CN120959449A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cigarette manufacturing technology, and more specifically, to a method for comprehensively controlling the tendency of cigarettes to fall into a cone. Background Technology
[0002] Cigarette tip loss refers to the phenomenon where the combustion cone of a cigarette detaches or becomes noticeably crooked during combustion or ash removal. This phenomenon reduces consumer recognition of the cigarette brand. In recent years, while the industry has experienced rapid growth in the production of slim and medium-sized cigarettes, the poorer holding power of the combustion cone has led to a more prominent issue of tip loss.
[0003] To address these issues, the industry has developed methods for measuring the tendency of cigarettes to fall into the combustion cone, providing a detection tool for controlling this tendency. In recent years, some scholars have conducted process research and achieved results in the following aspects: the influence of single cigarette weight, cigarette paper combustion aid content, tobacco moisture content, tobacco stem content, and leveling device specifications on the tendency of the combustion cone to fall in slim cigarettes; the influence of tobacco structure, processing technology, tobacco equilibrium humidity environment, and cigarette paper parameters on the tendency of the combustion cone to fall; and the relationship between tobacco structure distribution, cigarette density, combustion cone structure, and the tendency of the combustion cone to fall in slim cigarettes.
[0004] However, many factors influence the cigarette combustion cone tip. Although these studies have solved some of the problems, they are not systematic or comprehensive enough to effectively control the cigarette tip tip tendency.
[0005] Therefore, how to provide a comprehensive method for controlling the tendency of cigarettes to fall into cones has become a technical problem that urgently needs to be solved in this field. Summary of the Invention
[0006] The purpose of this invention is to provide a new technical solution for a comprehensive method to control the tendency of cigarettes to fall into cones.
[0007] This invention provides a method for comprehensively controlling the tendency of cigarettes to fall into a cone, comprising the following steps:
[0008] (1) Tobacco width control: Adjust the tobacco width according to the type of cigarette. The tobacco width of regular cigarettes is controlled at 0.95~1.05mm, the tobacco width of medium cigarettes is controlled at 0.85~0.95mm, and the tobacco width of slim cigarettes is controlled at 0.75~0.85mm.
[0009] (2) Control of tobacco filling value: By adjusting the moisture content of the material at the feeding outlet and the steam flow rate for heating and humidifying the tobacco leaves, the tobacco filling value is controlled to ≥4.1cm³ / g without changing the processing intensity;
[0010] (3) Control of tobacco moisture content: By adjusting the moisture content of the material at the feeding outlet or the flow rate of steam for heating and humidifying the tobacco leaves, the moisture content of the finished tobacco shreds is controlled at 12.5~13.2%;
[0011] (4) Tobacco structure adjustment: Adjust the characteristic length of the tobacco to the preset length according to the type of cigarette;
[0012] (5) Cigarette paper control: control the air permeability of cigarette paper to 30~80CU, control the ash content of cigarette paper to less than or equal to 18%, control the combustion aid content of cigarette paper to make the burning rate of cigarette paper synchronize with the burning rate of tobacco, and control the basis weight of cigarette paper to less than or equal to 28g / m².
[0013] (6) Cigarette density control: By adjusting the groove depth and arc length of the splitting disc, the rate of change of the axial distribution of cigarette density is ≥-4.0%.
[0014] Optionally, in step (4), after the tobacco leaves are dried, a flexible tobacco cutting device is added in combination with a flexible air separation device to adjust the characteristic length of tobacco leaves of conventional cigarettes and short cigarettes to 4.0~4.5mm, the characteristic length of tobacco leaves of medium cigarettes to 3.8~4.3mm, and the characteristic length of tobacco leaves of slim cigarettes to 3.5~4.0mm.
[0015] Optionally, the flexible air separation device includes: a multi-stage air separation channel with an air velocity gradient of 5~15m / s;
[0016] The photoelectric detection unit removes non-smoking substances ≥5mm from the tobacco shreds;
[0017] The negative pressure of the recovery chamber is controlled at -20~-10kPa.
[0018] Optionally, in step (5), the air permeability of the cigarette paper is further limited to 25~40 CU.
[0019] Optionally, in step (5), the ash content of the cigarette paper is further limited to 15% to 18%.
[0020] Optionally, in step (5), the content of the combustion aid in the cigarette paper is determined by a laboratory combustion rate matching test to ensure that the difference between the combustion rate of the cigarette paper and the combustion rate of the tobacco is ≤0.5s / mm.
[0021] Optionally, the method for comprehensively controlling the tendency of cigarettes to fall into a cone further includes:
[0022] After step (4), an online laser detection device is added to monitor the characteristic length of the tobacco shreds in real time. When the characteristic length of the tobacco shreds is not equal to the preset length, the online laser detection device is controlled to issue an alarm.
[0023] Optionally, the method for comprehensively controlling the tendency of cigarettes to fall into cones further includes: in step (5), the quantitative detection of cigarette paper adopts an online weighing method with an accuracy of ±0.5g / m².
[0024] The beneficial effects of this invention are as follows:
[0025] This invention first adjusts the width of the tobacco shreds according to the cigarette type. Then, by adjusting the moisture content of the material at the feeding outlet and the flow rate of the steam for heating and humidifying the tobacco shreds, the filling value of the tobacco shreds is controlled to ≥4.1 cm³ / g without changing the processing strength. Simultaneously, by adjusting the moisture content of the material at the feeding outlet or the flow rate of the steam for heating and humidifying the tobacco shreds, the moisture content of the finished tobacco shreds is controlled to 12.5~13.2%. At the same time, the characteristic length of the tobacco shreds is adjusted to a preset length according to the cigarette type. Next, the air permeability of the cigarette paper is controlled to 30~80 CU, the ash content of the cigarette paper is controlled to be less than or equal to 18%, the combustion aid content of the cigarette paper is controlled to synchronize the burning rate of the cigarette paper with the burning rate of the tobacco shreds, and the basis weight of the cigarette paper is controlled to be less than or equal to 28 g / m². Finally, by adjusting the groove depth and arc length of the cutting disc, the rate of change of the axial distribution of the cigarette density is ≥-4.0%. This invention effectively reduces the phenomenon of cigarette falling during smoking by comprehensively regulating key indicators that affect the tendency of cigarettes to fall into the cone, providing technical support for the control of cigarette falling into the cone and providing strong support for improving product quality.
[0026] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description
[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.
[0028] Figure 1 This is a structural diagram of the method for comprehensively controlling the tendency of cigarettes to fall into a cone according to the present invention. Detailed Implementation
[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the invention.
[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.
[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0032] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0033] like Figure 1 As shown, this embodiment of the invention provides a method for comprehensively controlling the tendency of cigarettes to fall into a cone, including the following steps:
[0034] Step (1) Tobacco width adjustment: Adjust the tobacco width according to the type of cigarette. The tobacco width of regular cigarettes is controlled at 0.95~1.05mm, the tobacco width of medium cigarettes is controlled at 0.85~0.95mm, and the tobacco width of slim cigarettes is controlled at 0.75~0.85mm.
[0035] The width of the tobacco shreds determines the contact area for the oxidation reaction during combustion. Too wide a shred can lead to excessively rapid localized combustion, concentrated heat, and excessively high temperatures at the base of the combustion cone, potentially causing premature charring or uneven combustion. Too narrow a shred can result in incomplete combustion due to insufficient oxygen supply, producing carbon deposits and reducing the mechanical strength of the combustion cone. Controlling the tobacco shred width of slim cigarettes to 0.75~0.85mm aims to reduce the combustion area to accommodate the lower air permeability and combustion speed of slim cigarettes, preventing the combustion cone from collapsing due to excessively rapid combustion.
[0036] Step (2) Tobacco Filling Value Control: By adjusting the moisture content of the material at the feeding outlet and the steam flow rate for heating and humidifying the tobacco leaves, the tobacco filling value is controlled to ≥4.1 cm³ / g without changing the processing intensity. The filling value reflects the degree of bulkiness of the tobacco. The higher the filling value, the greater the porosity between the tobacco leaves, and the looser the internal structure of the rolled cigarette. This structure weakens the adhesion between the combustion cone and the unburned tobacco leaves, making the combustion cone more prone to breakage and detachment under gravity or airflow. Conversely, tobacco leaves with a lower filling value have a denser structure, stronger combustion cone support, and a reduced tendency to fall off.
[0037] Step (3) Moisture content control of tobacco shreds: By adjusting the moisture content of the material at the feeding outlet or the steam flow rate for heating and humidifying the tobacco shreds, the moisture content of the finished tobacco shreds is controlled at 12.5~13.2%. The moisture content of tobacco shreds directly affects the chemical reaction kinetics during combustion. When the moisture content is too low (<12.5%), the tobacco shreds are too dry, the combustion speed is too fast, and the temperature at the root of the combustion cone rises sharply, which may lead to premature carbonization or incomplete combustion of the tobacco shreds, forming a local high-temperature area and weakening the mechanical strength of the combustion cone. When the moisture content is too high (>13.2%), the tobacco shreds burn too slowly, the heat at the front end of the combustion cone is insufficient, and a stable combustion interface cannot be maintained, resulting in a loose structure of the combustion cone, which is prone to collapse or detachment.
[0038] Step (4) Tobacco structure adjustment: Adjust the characteristic length of the tobacco to the preset length according to the type of cigarette;
[0039] Step (5) Cigarette paper control: control the air permeability of cigarette paper to 30~80CU, control the ash content of cigarette paper to less than or equal to 18%, control the combustion aid content of cigarette paper to make the burning rate of cigarette paper synchronize with the burning rate of tobacco, and control the quantitative amount of cigarette paper to less than or equal to 28g / m².
[0040] Specifically, the width of the tobacco shreds needs to be optimized in conjunction with air permeability. When the tobacco shreds are wide and the air permeability is high, the combustion speed is fast, which can easily cause the combustion cone to detach prematurely. When the tobacco shreds are narrow and the air permeability is low, the combustion speed is controllable and the combustion cone is more stable (especially suitable for slim cigarettes).
[0041] The ash content and combustion aid content of cigarette paper need to be matched with the burning rate of tobacco. If the tobacco is too wide and the combustion aid in the cigarette paper is insufficient, it may cause the front end of the combustion cone to overheat and accelerate the falling of the cone.
[0042] Step (6) Cigarette density control: By adjusting the groove depth and arc length of the split disc, the rate of change of the axial distribution of cigarette density is made ≥-4.0%. If the tobacco is too wide and the filling is too loose, the tobacco is prone to structural loosening due to thermal expansion during combustion, and the combustion cone loses its support. If the tobacco is too thin and the filling is too tight, insufficient air permeability may lead to incomplete combustion, which also weakens the stability of the combustion cone. By controlling the axial change rate of cigarette density, it is possible to ensure that the density decrease of the combustion cone from the smoking end to the mouth end is gradual.
[0043] It should be noted that the width of the tobacco shreds must match the density of the cigarette. For example, the characteristic length of medium-sized cigarette tobacco shreds (3.8~4.3mm) needs to be matched with a lower filling density to accommodate the longer combustion path of medium-sized cigarettes.
[0044] This invention first adjusts the width of the tobacco shreds according to the cigarette type. Then, by adjusting the moisture content of the material at the feeding outlet and the flow rate of the steam for heating and humidifying the tobacco shreds, the filling value of the tobacco shreds is controlled to ≥4.1 cm³ / g without changing the processing strength. Next, by adjusting the moisture content of the material at the feeding outlet or the flow rate of the steam for heating and humidifying the tobacco shreds, the moisture content of the finished tobacco shreds is controlled to 12.5~13.2%. Next, the characteristic length of the tobacco shreds is adjusted to a preset length according to the cigarette type. Next, the air permeability of the cigarette paper is controlled to 30~80 CU, the ash content of the cigarette paper is controlled to be less than or equal to 18%, the combustion aid content of the cigarette paper is controlled to synchronize the burning rate of the cigarette paper with the burning rate of the tobacco shreds, and the basis weight of the cigarette paper is controlled to be less than or equal to 28 g / m². Finally, by adjusting the groove depth and arc length of the splitting disc, the rate of change of the axial distribution of the cigarette density is ≥-4.0%. This invention effectively reduces the phenomenon of cigarette falling during smoking by comprehensively regulating key indicators that affect the tendency of cigarettes to fall into the cone, providing technical support for the control of cigarette falling into the cone and providing strong support for improving product quality.
[0045] In one embodiment of the method for comprehensively controlling the tendency of cigarettes to fall into cones according to the present invention, in step (4), after the tobacco leaves are dried, a flexible tobacco breaking device is added in combination with a flexible air separation device to adjust the characteristic length of tobacco leaves of conventional cigarettes and short cigarettes to 4.0~4.5mm, the characteristic length of tobacco leaves of medium cigarettes to 3.8~4.3mm, and the characteristic length of tobacco leaves of slim cigarettes to 3.5~4.0mm.
[0046] The length of the tobacco directly affects the contact area for the oxidation reaction during combustion. Excessively long tobacco can lead to uneven combustion, excessively rapid localized combustion, concentrated heat, and excessively high temperatures at the base of the combustion cone, causing carbonization or structural loosening. Conversely, excessively short tobacco may result in incomplete combustion due to insufficient oxygen supply, producing carbon deposits and reducing the mechanical strength of the combustion cone. Controlling the characteristic length of tobacco in slim cigarettes to 3.5–4.0 mm (shorter than conventional cigarettes) aims to shorten the combustion path to accommodate the lower permeability and combustion speed of slim cigarettes, preventing combustion cone collapse due to excessively rapid combustion.
[0047] Furthermore, the flexible air separation device includes: a multi-stage air separation channel with an air velocity gradient of 5~15m / s;
[0048] The photoelectric detection unit removes non-smoking substances ≥5mm from the tobacco shreds;
[0049] The negative pressure of the recovery chamber is controlled at -20~-10kPa.
[0050] In one embodiment of the method for comprehensively controlling the tendency of cigarettes to fall into a cone according to the present invention, in step (5), the air permeability of the cigarette paper is further limited to 25~40 CU. The lower the air permeability, the smaller the porosity of the cigarette paper, the greater the resistance to air entering the combustion zone, and the lower the combustion speed.
[0051] This invention limits the air permeability of cigarette paper to 25~40CU, which can effectively slow down the combustion rate and avoid local overheating, carbonization or loosening of the combustion cone due to excessively fast combustion, thereby reducing the risk of the cone falling off.
[0052] Excessive air permeability (e.g., >80CU) leads to excessive air entering the combustion zone, resulting in excessively fast and uneven combustion. This can easily create localized high temperatures and oxygen-deficient areas, making the combustion cone structure fragile. Limiting the air permeability of cigarette paper to 25~40CU can balance oxygen supply and combustion rate, ensure a stable combustion interface, and reduce cone drop caused by uneven combustion.
[0053] In one embodiment of the method for comprehensively controlling the tendency of cigarettes to fall into cones according to the present invention, in step (5), the ash content of the cigarette paper is further limited to 15% to 18%.
[0054] Ash content is the residue left after cigarette paper burns, and its content directly affects the combustion characteristics of cigarette paper. When the ash content is too low, the cigarette paper burns too quickly, which may cause heat concentration at the front of the combustion cone, resulting in excessively high local temperatures and causing the tobacco to carbonize or become loose. When the ash content is too high, the combustion speed is too slow, and the oxygen supply to the rear of the combustion cone is insufficient, which can easily lead to incomplete combustion, carbon buildup, and reduced mechanical strength of the combustion cone.
[0055] An ash content range of 15% to 18% can balance the combustion rate, synchronize the combustion speed of cigarette paper and tobacco, and maintain the axial stability of the combustion cone.
[0056] In one embodiment of the method for comprehensively controlling the tendency of cigarettes to fall into cones according to the present invention, in step (5), the content of the combustion aid in the cigarette paper is determined by a laboratory combustion rate matching test to ensure that the difference between the combustion rate of the cigarette paper and the combustion rate of the tobacco is ≤0.5s / mm.
[0057] The burning rates of tobacco and cigarette paper must be matched. If the difference between the two is too large (such as the cigarette paper burning too fast or too slow), it will cause "disconnection" or "accumulation" at the combustion interface (the front of the oxidation reaction).
[0058] During cigarette combustion, the combustion cone needs to maintain a uniform heat distribution from the inhalation end to the mouthpiece. If the cigarette paper burns significantly faster than the tobacco (e.g., the difference > 0.5 s / mm), the base of the combustion cone may collapse prematurely due to excessive heat accumulation; conversely, if the tobacco burns faster, the rear of the combustion cone may break due to lack of oxygen.
[0059] Furthermore, if the cigarette paper burns too slowly, the rear of the combustion cone may form a reducing environment due to insufficient oxygen, leading to an increase in the generation of harmful substances such as tar and CO.
[0060] In one embodiment of the method for comprehensively controlling the tendency of cigarettes to fall into a cone according to the present invention, the method further includes:
[0061] After step (4), an online laser detection device is added to monitor the characteristic length of the tobacco shreds in real time. When the characteristic length of the tobacco shreds is not equal to the preset length, the online laser detection device is controlled to issue an alarm.
[0062] This invention, by adding an online laser detection device, can monitor the characteristic length of tobacco shreds in real time, thereby facilitating the detection and observation by operators.
[0063] In one embodiment of the method for comprehensively controlling the tendency of cigarettes to fall into a cone according to the present invention, the method further includes: in step (5), the quantitative detection of cigarette paper adopts the online weighing method with an accuracy of ±0.5g / m², which ensures accuracy.
[0064] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims
1. A method of comprehensively controlling the tendency of a cigarette to fall out of a cone, characterized by, The method comprises the following steps: (1) Tobacco width control: adjusting the tobacco width according to the cigarette type, wherein the tobacco width of regular cigarettes is controlled to be 0.95-1.05 mm, the tobacco width of medium cigarettes is controlled to be 0.85-0.95 mm, and the tobacco width of slim cigarettes is controlled to be 0.75-0.85 mm; (2) Tobacco filling value control: adjusting the moisture content of the material at the feeding outlet and the steam flow of the tobacco warming and humidifying device to control the tobacco filling value to be greater than or equal to 4.1 cm³ / g without changing the processing intensity; (3) Tobacco moisture content control: adjusting the moisture content of the material at the feeding outlet or the steam flow of the tobacco warming and humidifying device to control the moisture content of the finished tobacco to be 12.5-13.2%; (4) Tobacco structure control: adjusting the characteristic length of the tobacco to a preset length according to the cigarette type; (5) Cigarette paper control: controlling the permeability of the cigarette paper to be 30-80 CU, controlling the ash content of the cigarette paper to be less than or equal to 18%, controlling the combustion-supporting agent content of the cigarette paper to make the burning rate of the cigarette paper synchronous with the burning rate of the tobacco, and controlling the basis weight of the cigarette paper to be less than or equal to 28 g / m²; (6) Cigarette density control: adjusting the groove depth and arc length of the cutting disc to make the change rate of the axial distribution of the cigarette density be greater than or equal to -4.0%.
2. The method of claim 1, wherein the method further comprises: In step (4), a flexible filament breaking device and a flexible air separation device are added after the drying of the tobacco to control the characteristic length of the tobacco of regular cigarettes and short cigarettes to be 4.0-4.5 mm, the characteristic length of the tobacco of medium cigarettes to be 3.8-4.3 mm, and the characteristic length of the tobacco of slim cigarettes to be 3.5-4.0 mm.
3. The method of claim 2, wherein the method further comprises: The flexible air separation device comprises: a multi-stage air separation channel with a wind speed gradient of 5-15 m / s; A photoelectric detection unit is arranged to remove non-tobacco substances greater than or equal to 5 mm from the tobacco; The negative pressure of the recovery bin is controlled to be -20 to -10 kPa.
4. The method of claim 1, wherein the method further comprises: In step (5), the permeability of the cigarette paper is further limited to 25-40 CU.
5. The method of claim 1, wherein the method further comprises: In step (5), the ash content of the cigarette paper is further limited to 15%-18%.
6. The method of claim 1, wherein the method further comprises: In step (5), the combustion-supporting agent content of the cigarette paper is determined through a laboratory burning rate matching test to ensure that the difference between the burning rate of the cigarette paper and the burning rate of the tobacco is less than or equal to 0.5 s / mm.
7. The method of claim 1, wherein the method further comprises: The method for comprehensively controlling the falling cone tendency of cigarettes further comprises: An online laser detection device is added after step (4) to monitor the characteristic length of the tobacco in real time, and the online laser detection device sends an alarm when the characteristic length of the tobacco is not equal to the preset length.
8. The method of claim 1, wherein the method further comprises: In step (5), the basis weight of the cigarette paper is detected by an online weighing method with an accuracy of ±0.5 g / m².