Method for predicting density of slim cigarettes and determining specifications of splitting discs

Abstract

The present invention relates to a method for predicting the density of slim cigarettes and a method for determining the specifications of a splitting disc. The prediction method comprises: collecting information on the specifications of the splitting disc and the corresponding cigarette density of the slim cigarette product; the splitting disc specifications include: arc length of the deep groove, arc length of the shallow groove, depth of the deep groove, and depth of the shallow groove; the cigarette density information includes: standard density of the compacted end and standard density of the non-compacted end; a first relationship model between the density of the compacted end and the specifications of the splitting disc, and a second relationship model between the standard density of the non-compacted end and the specifications of the splitting disc are established based on the specifications of the splitting disc and the corresponding cigarette density information; based on the known specifications of the splitting disc, the first relationship model, and the second relationship model, the cigarette density information of the slim cigarette product is predicted. The above-mentioned method for predicting the density of slim cigarettes and the method for determining the specifications of the splitting disc are both based on the relationship model between the specifications of the splitting disc and the cigarette density information, and thus can realize online operation, reduce the involvement of human subjective factors, and improve the objectivity of the results.

Description

Technical Field

[0001] The present invention relates to the technical field of slim cigarettes, and in particular to a method for predicting the density of slim cigarettes and a method for determining the specifications of a splitting disc. Background Art

[0002] Compared to conventional cigarettes, slim cigarettes feature smaller circumference, lower tar content, and longer lengths. These have become an international trend and are gaining increasing market acceptance. During the rolling process, the end of the tobacco segment, known as the compacted end, must be denser, while the remaining portion, known as the uncompacted end, has a relatively lower density. Due to their small diameter, slim cigarettes are prone to curling and clumping, leading to poor mixing uniformity during the rolling process. This can lead to problems such as a hollow, thin end and a prone-to-fall combustion cone, resulting in significant quality fluctuations.

[0003] For the above situation, the relevant art provides a variety of methods for evaluating cigarette density. For example, Chinese patent document No. CN111678841A discloses a method for evaluating cigarette density uniformity. This method matrixes cigarette density data and calculates the density uniformity of individual cigarettes and batches of cigarettes according to corresponding formulas. Another example is Chinese patent document No. CN104165822A, which discloses a method for quantitatively evaluating cigarette density uniformity. Based on the characteristic that cigarette density distribution generally exhibits a dense distribution at both ends, a cigarette density distribution curve is first created and the coefficient of variation method is used to quantitatively evaluate the uniformity of cigarette density distribution. The relevant art only involves evaluating the density uniformity of known cigarette products and does not mention how to regulate the density of slim cigarettes. Regulating the density of slim cigarettes to optimize cigarette density distribution, reduce end-face empty and thin ends, and alleviate the problem of cone drop in slim cigarettes has become a growing concern for those skilled in the art.

[0004] Compared to conventional cigarettes, slim cigarettes offer advantages such as lower tar content, lower tobacco consumption, and greater potential for development. However, due to their smaller diameter, the distribution of tobacco within the cigarette differs from that of conventional cigarettes, leading to tobacco curling and clumping, resulting in the burning cone falling off and excessively high density. Therefore, it is imperative to develop a model for rapidly predicting the density of slim cigarettes, optimize the density distribution, reduce the number of empty and thin ends, and mitigate the problem of cone falling in slim cigarettes. Summary of the Invention

[0005] To solve or partially solve the problems existing in the related art, the present invention provides a method for predicting the density of slim cigarettes, comprising the steps of:

[0006] S01), under the same rolling conditions, collecting the specifications of the splitting blade and the corresponding slim cigarette product density information; the splitting blade specifications include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density;

[0007] S02) establishing a first relationship model between the compacted end density and the splitting disc specifications, and a second relationship model between the non-compacted end standard density and the splitting disc specifications based on the splitting disc specifications and the corresponding cigarette density information;

[0008] S03) Predicting the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the first relationship model, and the second relationship model.

[0009] Furthermore, the step S01) specifically includes:

[0010] Under the same rolling conditions, different sizes of splitter discs were used for rolling, and several slim cigarettes corresponding to each splitter disc were taken as test samples;

[0011] The sample to be tested was pretreated according to the following conditions: balanced in a constant temperature and humidity environment at a temperature of 22° C. and a relative humidity of 60% for 48 h;

[0012] Use a microwave moisture density meter to measure the measured density and measured moisture content of the compacted end of the sample to be tested, and convert the measured density and measured moisture content into a standard density with a moisture content of 12%, that is, the standard density of the compacted end; calculate the standard density of the non-compacted end using the same method;

[0013] The specifications of the splitting disc and the corresponding cigarette density information of slim cigarette products are collected; the specifications of the splitting disc include: deep groove arc length, shallow groove arc length, deep groove depth and shallow groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density.

[0014] Furthermore, the step S02) is specifically as follows:

[0015] Using multiple regression analysis, a first relationship model between compacted end density and chopper disk specifications, and a second relationship model between non-compacted end standard density and chopper disk specifications were established based on chopper disk specifications and corresponding cigarette density information.

[0016] The first relationship model is shown in Formula 1:

[0017] ρ 实 =K1+α1×L1+α2×L2+β1×D1+β2×D2 Formula I

[0018] In formula I, ρ 实The standard density at the compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K1 is a constant, α1, α2, β1 and β2 are coefficients;

[0019] The second relationship model is shown in Formula II:

[0020] ρ 非实 =K2+γ1×L1+γ2×L2+ε1×D1+ε2×D2 Formula II

[0021] In formula II, ρ 非实 is the standard density of the non-compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K2 is a constant, γ1, γ2, ε1 and ε2 are coefficients.

[0022] Furthermore, the dimensions of the slim cigarettes are: cigarette length (90.0 mm to 97.0 mm) ± 0.5 mm, circumference (17.00 mm to 17.10 mm) ± 0.2 mm; in Formula I: K1 = 363.6, α1 = 1.905, α2 = -2.053, β1 = 39.65, β2 = -108.8; in Formula II: K2 = 343.8, γ1 = -0.08, γ2 = -2.078, ε1 = 0.99, ε2 = -43.90.

[0023] The present invention also provides a method for determining the specifications of a riving cutter disc, which comprises the steps of:

[0024] C01), under the same rolling conditions, collecting the specifications of the splitting blade and the corresponding slim cigarette product density information; the splitting blade specifications include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density;

[0025] C02) establishing a first relationship model between compacted end density and splitting disc specifications, and a second relationship model between non-compacted end standard density and splitting disc specifications based on splitting disc specifications and corresponding cigarette density information;

[0026] C03) Determine the specifications of the chopping disc according to the preset cigarette density information, the first relationship model and the second relationship model.

[0027] Furthermore, the method further comprises the steps of:

[0028] C04), according to the specifications of the splitting disc determined in step C03), use the corresponding splitting disc to roll the slim cigarette products, conduct a smoking test on the prepared slim cigarette products, and determine the optimized specifications of the splitting disc based on the smoking test results.

[0029] Furthermore, the step C01) specifically includes:

[0030] Under the same rolling conditions, a variety of different sizes of splitter discs were used for rolling, and several slim cigarettes corresponding to each splitter disc were taken as test samples;

[0031] The sample to be tested was pretreated according to the following conditions: balanced in a constant temperature and humidity environment at a temperature of 22° C. and a relative humidity of 60% for 48 h;

[0032] Use a microwave moisture density meter to measure the measured density and measured moisture content of the compacted end of the sample to be tested, and convert the measured density and measured moisture content into a standard density with a moisture content of 12%, that is, the standard density of the compacted end; calculate the standard density of the non-compacted end using the same method;

[0033] The specifications of the splitting disc and the corresponding cigarette density information of slim cigarette products are collected; the specifications of the splitting disc include: deep groove arc length, shallow groove arc length, deep groove depth and shallow groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density.

[0034] Furthermore, the step C02) is specifically as follows:

[0035] Using multiple regression analysis, a first relationship model between compacted end density and chopper disk specifications, and a second relationship model between non-compacted end standard density and chopper disk specifications were established based on chopper disk specifications and corresponding cigarette density information.

[0036] The first relationship model is shown in Formula 1:

[0037] ρ 实 =K1+α1×L1+α2×L2+β1×D1+β2×D2 Formula I

[0038] In formula I, ρ 实 The standard density at the compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K1 is a constant, α1, α2, β1 and β2 are coefficients;

[0039] The second relationship model is shown in Formula II:

[0040] ρ 非实 =K2+γ1×L1+γ2×L2+ε1×D1+ε2×D2 Formula II

[0041] In formula II, ρ 非实 is the standard density of the non-compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K2 is a constant, γ1, γ2, ε1 and ε2 are coefficients.

[0042] Furthermore, the dimensions of the slim cigarettes are: cigarette length (90.0 mm to 97.0 mm) ± 0.5 mm, circumference (17.00 mm to 17.10 mm) ± 0.2 mm; in Formula I: K1 = 363.6, α1 = 1.905, α2 = -2.053, β1 = 39.65, β2 = -108.8; in Formula II: K2 = 343.8, γ1 = -0.08, γ2 = -2.078, ε1 = 0.99, ε2 = -43.90.

[0043] The present invention also provides a device for automatically matching the density of slim cigarettes with the specifications of a splitting disc, which comprises:

[0044] An information collection unit is used to collect information on the specifications of the splitting disc and the corresponding density of slim cigarettes under the same rolling conditions; the specifications of the splitting disc include: arc length of the deep groove, arc length of the shallow groove, groove depth of the deep groove, and groove depth of the shallow groove; the cigarette density information includes: standard density of the compacted end and standard density of the non-compacted end;

[0045] a modeling unit for establishing a first relationship model between the density at the compacting end and the specifications of the splitting disc, and a second relationship model between the standard density at the non-compacting end and the specifications of the splitting disc, based on the specifications of the splitting disc and the corresponding cigarette density information;

[0046] The matching unit is used to predict the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the first relationship model and the second relationship model; or to determine the specifications of the splitting disc based on preset cigarette density information, the first relationship model and the second relationship model.

[0047] The technical solution provided by the present invention can have the following beneficial effects:

[0048] 1. By adopting the method for predicting the density of slim cigarettes provided by the present invention, the density of the compacted end and the non-compacted end of the slim cigarette product can be quickly inferred by simply entering the specifications of the splitting disc; further, by using the difference between the two, it can also be determined whether the tobacco is evenly distributed in the cigarette. The cigarette density information thus obtained is of guiding significance for cigarette production. If the predicted cigarette density information meets the requirements, it means that the splitting disc is suitable for processing this brand of cigarettes; if the predicted cigarette density information does not meet the requirements, the predicted cigarette density information can be compared with the expected cigarette density information. According to the comparison results, the splitting disc can be directionally adjusted and replaced in combination with the above-mentioned relationship model, and the specifications of the replaced splitting disc can be entered to obtain the predicted cigarette density information until the cigarette density information meets the expected requirements. This method is simple to operate and highly accurate, and provides methodological support for reducing the empty rate of slim cigarettes and the problem of cigarette cone drop.

[0049] 2. The method for determining the specifications of the splitting disc provided by the present invention can quickly match the corresponding splitting disc specifications when the density information of the slim cigarette product is determined, thereby achieving controllable density of the slim cigarette product, and the operation is fast and simple.

[0050] 3. The slim cigarette density prediction method and splitter disk specification determination method provided by the present invention are both based on the relationship model between splitter disk specifications and cigarette density information. Therefore, online operation can be achieved, reducing the involvement of human subjective factors and improving the objectivity of the results.

[0051] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0053] Figure 1 This is a schematic diagram of the steps of the method for predicting density of slim cigarettes provided in Example 1 of the present invention;

[0054] Figure 2 This is a schematic diagram of the steps of the method for predicting the density of slim cigarettes provided in the second embodiment of the present invention;

[0055] Figure 3 is a diagram of the density of the compacted end and the density of the non-compacted end of each of the 70 groups of samples in the embodiment of the present invention;

[0056] Figure 4 This is a comparison diagram of the density of the inner and outer smoke exhaust branches before and after the chopping disc is adjusted in Example 2 of the present invention;

[0057] Figure 5 This is a schematic diagram of the structure of the device for automatically matching the density of slim cigarettes with the specifications of the splitting disc provided in the third embodiment. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0060] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0061] During the cigarette rolling process, the splitter discs are symmetrically arranged with the center of the tobacco bundle as the reference. Grooves are arranged around the discs to retain more tobacco in certain areas of the tobacco bundle. The cutter cuts in these areas, creating a tight end at the outer end of the produced cigarette. The number of grooves on the discs depends on the length of the tobacco rod. Different rod lengths correspond to different numbers of grooves on the discs. Conventional cigarettes generally have six grooves on the discs, while slim cigarettes have four grooves, including two deep grooves and two shallow grooves. The deep grooves correspond to the tight end of the cigarette, or the compacted end, and half the arc length of the deep grooves corresponds to the length of the compacted end. The arc length and depth of the splitting disc grooves affect the amount of tobacco retained. Therefore, the inventors of this application considered establishing a relationship between the density of slim cigarettes and the specifications of the splitting disc, thereby achieving density control of slim cigarettes. This density control is reflected in the following aspects: on the one hand, when the specifications of the splitting disc are determined, the density information of the slim cigarette products can be predicted, that is, the product density can be pre-judged before production. If the predicted result is unsatisfactory, it can be adjusted by changing the splitting disc specifications to other specifications; on the other hand, when the density information of the slim cigarette products is determined, the corresponding splitting disc specifications can be matched, so that the desired density product can be quickly and accurately controlled.

[0062] In view of this, the first embodiment of the present invention provides a method for predicting the density of slim cigarettes, see Figure 1 , which comprises the steps of:

[0063] S01), under the same rolling conditions, collecting the specifications of the splitting blade and the corresponding slim cigarette product density information; the splitting blade specifications include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density;

[0064] S02) establishing a first relationship model between the compacted end density and the splitting disc specifications, and a second relationship model between the non-compacted end standard density and the splitting disc specifications based on the splitting disc specifications and the corresponding cigarette density information;

[0065] S03) Predicting the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the first relationship model, and the second relationship model.

[0066] The above S01) is the process of collecting data, which may specifically include:

[0067] Under the same rolling conditions, different sizes of splitter discs were used for rolling, and several slim cigarettes corresponding to each splitter disc were taken as test samples;

[0068] The sample to be tested was pretreated according to the following conditions: balanced in a constant temperature and humidity environment at a temperature of 22° C. and a relative humidity of 60% for 48 h;

[0069] Use a microwave moisture density meter to measure the measured density and measured moisture content of the compacted end of the sample to be tested, and convert the measured density and measured moisture content into a standard density with a moisture content of 12%, that is, the standard density of the compacted end; calculate the standard density of the non-compacted end using the same method;

[0070] The specifications of the splitting disc and the corresponding cigarette density information of slim cigarette products are collected; the specifications of the splitting disc include: deep groove arc length, shallow groove arc length, deep groove depth and shallow groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density.

[0071] To eliminate the potential impact of other process conditions on subsequent modeling, the only process variable during the rolling process was the blade disc specifications. All other process conditions (e.g., slim cigarette brand, cigarette making machine model, tobacco and auxiliary materials, production speed, and specific process parameters for each step) remained constant. The corresponding outcome variable was cigarette density. The number of samples tested for each blade disc was preferably no less than 500.

[0072] Cigarette density information includes: the standard density of the compacted end and the standard density of the non-compacted end. As is well known in the art, the standard density is the density with a moisture content of 12%. Using the standard density as the data collection target is conducive to pre-eliminating the influence of humidity and moisture content differences on density, thereby improving the accuracy of subsequent analysis. Furthermore, this embodiment also performs a pre-processing step according to the above steps before testing the density of slim cigarette products, and then uses a microwave moisture density meter to detect the measured density and measured moisture content of the compacted end and non-compacted end of the sample to be tested, and finally obtains the standard density through conversion based on the measured density and measured moisture content. Specifically, the conversion can be performed according to Formula III:

[0073] ρ 标 =(1-w%) / (1-12%)ρ 实测 Formula III

[0074] In formula III: w% is the measured density, ρ 实测 is the measured moisture content, ρ 标 It is the converted standard density data.

[0075] Furthermore, the above-mentioned standard density of the compacted end can be obtained according to the following method: dividing the compacted end into several compacted end detection segments with a length of 1 mm, and taking the average of the standard densities of several compacted end detection segments; similarly, the standard density of the non-compacted end can be obtained according to the following method: dividing the non-compacted end into several non-compacted end detection segments with a length of 1 mm, and taking the average of the standard densities of several non-compacted end detection segments.

[0076] Step S02) is a modeling step based on the information collected in step S01), thereby establishing a first relationship model between the density at the compacted end and the specifications of the splitting disc, and a second relationship model between the standard density at the non-compacted end and the specifications of the splitting disc. Specifically, this step can utilize multiple regression analysis to establish the first relationship model between the density at the compacted end and the specifications of the splitting disc, and the second relationship model between the standard density at the non-compacted end and the specifications of the splitting disc, based on the splitting disc specifications and the corresponding cigarette density information.

[0077] The first relationship model is shown in Formula I:

[0078] ρ 实 =K1+α1×L1+α2×L2+β1×D1+β2×D2 Formula I

[0079] In formula I, ρ 实 The standard density at the compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K1 is a constant, α1, α2, β1 and β2 are coefficients;

[0080] The second relationship model is shown in Formula II:

[0081] ρ 非实 =K2+γ1×L1+γ2×L2+ε1×D1+ε2×D2 Formula II

[0082] In formula II, ρ 非实 is the standard density of the non-compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K2 is a constant, γ1, γ2, ε1 and ε2 are coefficients.

[0083] Preferably, for slim cigarettes having dimensions of: cigarette length (90.0 mm to 97.0 mm) ± 0.5 mm, circumference (17.00 mm to 17.10 mm) ± 0.2 mm; in Formula I: K1 = 363.6, α1 = 1.905, α2 = -2.053, β1 = 39.65, β2 = -108.8; in Formula II: K2 = 343.8, γ1 = -0.08, γ2 = -2.078, ε1 = 0.99, ε2 = -43.90.

[0084] Furthermore, the density deviation (i.e., ρ 实 -ρ 非实 ) and the third relationship model of the blade disc specifications, the third relationship model is shown in Formula IV: Δρ=(K1-K2)+(α1-γ1)×L1+(α2-γ2)×L2+(β1-ε1)×D1+(β2-ε2)×D2 Formula IV

[0085] In Formula IV, Δρ is the density deviation. In this case, the above-mentioned cigarette density information also includes the density deviation.

[0086] This step can obtain the relationship between the specifications of the splitting disc and the cigarette density information, and then proceed to step S03), predicting the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the above-mentioned first relationship model and the second relationship model. Therefore, it is only necessary to enter the specifications of the splitting disc to quickly infer the density of the compacted end and the non-compacted end of the slim cigarette product; further, through the difference between the two, that is, the above-mentioned density deviation, it can also be determined whether the tobacco is evenly distributed in the cigarette. The cigarette density information thus obtained is of guiding significance for cigarette production. If the predicted cigarette density information meets the requirements, it means that the splitting disc is suitable for processing this brand of cigarettes; if the predicted cigarette density information does not meet the requirements, the predicted cigarette density information can be compared with the expected cigarette density information. According to the comparison results, the splitting disc can be directionally adjusted and replaced in combination with the above-mentioned relationship model, and the specifications of the replaced splitting disc are entered to obtain the predicted cigarette density information until the cigarette density information meets the expected requirements. This method is simple to operate and highly accurate, and provides methodological support for reducing the empty end rate and cone drop problems of slim cigarettes.

[0087] Based on the same inventive concept, the second embodiment of the present invention provides a method for determining the specifications of the riving cutter disc, see Figure 2 , which comprises the steps of:

[0088] C01), under the same rolling conditions, collecting the specifications of the splitting blade and the corresponding slim cigarette product density information; the splitting blade specifications include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density;

[0089] C02) establishing a first relationship model between compacted end density and splitting disc specifications, and a second relationship model between non-compacted end standard density and splitting disc specifications based on splitting disc specifications and corresponding cigarette density information;

[0090] C03) Determine the specifications of the chopping disc according to the preset cigarette density information, the first relationship model and the second relationship model.

[0091] Steps C01) and C02) in this method are the same as steps S01) and S02) in the embodiment, and are both processes of collecting data and modeling based on the collected data. The preferred embodiments of steps C01) and C02) are also the same as steps S01) and S02) and are not described in detail here. Step C03) in the method of this embodiment is a step of determining the specifications of the splitting disc based on the preset cigarette density information. According to step C02), the relationship between the cigarette density information and the splitting disc specifications has been established. Therefore, it is only necessary to determine the preset cigarette density information to infer the corresponding one or several groups of splitting disc specifications. Therefore, when the density information of the thin cigarette product is determined, the corresponding splitting disc specifications can be quickly matched, and the controllability of the density of the thin cigarette product can be achieved, and the operation is quick and easy.

[0092] Furthermore, the method preferably includes step C04): rolling the cigarette using the corresponding splitting disc according to the splitting disc specifications determined in step C03), subjecting the resulting slim cigarette product to a puff test, and determining optimized splitting disc specifications based on the puff test results. If multiple splitting disc specifications are determined in step C03), step C04 can be continued to optimize the solution, ensuring that the final slim cigarette product not only meets the density requirements but also has an optimal smoking experience.

[0093] It should be noted that the groove depth of the deep groove in the riving cutter disc in the present application is not less than the groove depth of the shallow groove, that is, the groove depth of the deep groove can be greater than the groove depth of the shallow groove, or can be equal to the groove depth of the shallow groove.

[0094] The technical solution of the present invention will be further described below in conjunction with specific embodiments:

[0095] Example 1

[0096] Based on a certain brand A slim cigarette from Zhangjiakou Cigarette Factory (cigarette length 97.0 mm, circumference 17.00 mm, filter length 30.0 mm), the cigarettes were rolled using the same cut tobacco and auxiliary materials on the same ZJ17 cigarette-making locomotive under normal production conditions, on the same shift, at the same production speed, using seven different sizes of splitter discs (all with two deep grooves and two shallow grooves). The specifications of the splitter discs are listed in Table 1. After the equipment was running smoothly, each splitter disc was used for normal production for 15 minutes. 500 cigarettes were sampled for each sample. The samples were equilibrated in a constant temperature and humidity chamber at 22°C and 60% relative humidity for 48 hours. After that, they were sorted according to the weight of (560±5) mg / cigarette for later use.

[0097] Table 1 Different parameter specifications of the splitting disc

[0098] Chopper disc model Deep groove arc length (mm) Shallow groove arc length (mm) Depth of groove (mm) Shallow groove mm 1410-2818 14 10 2.8 1.8 20-2515 20 20 2.5 1.5 17-2515 17 17 2.5 1.5 2017-2515 20 17 2.5 1.5 20-2015 20 20 2.0 1.5 17-2015 17 17 2.0 1.5 2017-2015 20 17 2.0 1.5

[0099] Cigarette density segmentation: The 7mm section at the intersection of the tipping paper and cigarette paper features a metal ring and metal lettering related to the cigarette brand. For 97mm slim cigarettes, excluding the 30mm filter rod and the 7mm interference section caused by the metal ring, the remaining 60mm represents the effective density segment. The effective density segment is further divided into the compacted end and the non-compacted end. The compacted end is defined as the section half the arc length of the groove from the end, while the remainder is the non-compacted end.

[0100] The compacted and non-compacted ends of the sample cigarettes were tested using an MW4420 microwave moisture density meter, and the average value was taken as the test result. The standard density of the cigarettes was calculated as follows: the density data obtained by the MW4420 microwave moisture density meter was converted to the standard density data with a moisture content of 12%, where the conversion formula is:

[0101] ρ 标 =(1-w%) / (1-12%)ρ 实测

[0102] Where w% is the measured density, ρ 实测 is the measured moisture content, ρ 标 It is the converted standard density data.

[0103] The 500 cigarette samples corresponding to each splitting disc were evenly divided into 10 groups, that is, each splitting disc corresponded to 10 groups of samples, and the 7 splitting discs had a total of 70 groups of samples. The 70 groups of samples were numbered 1, 2, 3, ... 70. The average of the standard density at the compacted end and the average of the standard density at the non-compacted end of each group of samples were calculated according to the above method. The density at the compacted end (the average of the standard density at the compacted end) and the density at the non-compacted end (the average of the standard density at the non-compacted end) of each group of samples can be found in Figure 3 , Figure 3The corresponding cleaver disc models for numbers 1-10 are 20-2015, 11-20 are 17-2015, 21-30 are 2017-2015, 31-40 are 1410-2818, 41-50 are 20-2515, 51-60 are 17-2515, and 61-70 are 2017-2515. Of the two density values corresponding to the same number, the larger one is the density at the compacted end, and the smaller one is the density at the uncompacted end.

[0104] The information of the specifications of the splitting disc and the density of the corresponding slim cigarette products was collected, and the relationship model between the compaction end density and the specifications of the splitting disc was analyzed by multiple regression. The first relationship model (R 2 >0.799):

[0105] ρ 实 =363.6+1.905 L1-2.053 L2+39.65 D1-108.8 D2 Formula 1

[0106] And the second relationship model between the standard density of the non-compacted end and the specifications of the splitting disc (R 2 >0.892):

[0107] ρ 非实 =343.8-0.088 L1-2.078 L2+0.99 D1-43.90 D2 Formula 2

[0108] ρ 实 is the standard density of the compacted end, in mg / cm 3 ,ρ 非实 is the standard density of the non-compacted end, in mg / cm 3 , L1 is the arc length of the deep groove, unit is mm, L2 is the arc length of the shallow groove, unit is mm, D1 is the depth of the deep groove, unit is mm, D2 is the depth of the shallow groove, unit is mm.

[0109] Because the deep groove corresponds to the compacted end of the cigarette, it is easy to assume that the density of the compacted end is only affected by the deep groove size. However, according to Formula 1, the density of the compacted end is not only related to the deep groove size, but also to the shallow groove size. Combined with the correlation coefficient, it can be assumed that the influence of the shallow groove size on the compacted end density even exceeds that of the deep groove size.

[0110] Specifically, according to Equation 1, the compaction end density is significantly correlated with the deep groove arc length, shallow groove arc length, deep groove depth, and shallow groove depth of the cutterhead. With an increase in the deep groove arc length, the compaction end density increases, while with an increase in the shallow groove arc length, the compaction end density decreases. With other conditions remaining unchanged, a change in the shallow groove arc length of the same magnitude has a greater impact on the compaction end density than a change in the deep groove arc length. With an increase in the compaction end groove depth, the compaction end density increases, while with an increase in the shallow groove depth, the compaction end density decreases. With other conditions remaining unchanged, a change in the shallow groove depth of the same magnitude has a greater impact on the compaction end density than a change in the deep groove depth.

[0111] Equation 2 shows that the density of the non-compacted end is significantly affected by the size of the shallow groove and less so by the size of the deep groove. The density of the non-compacted end decreases with increasing shallow groove arc length, and decreases with increasing shallow groove depth.

[0112] While testing density, all samples were grouped and smoked for sensory evaluation. The consensus was that variations in the arc length of the chopper disc's grooves significantly impacted the cigarette's sensory properties, particularly when the arc lengths of the deep and shallow grooves were unequal. This resulted in significant sensory differences, with noticeable changes in both smoke and aroma. Increasing the depth of the deep grooves increased sensory differences, while changes in the shallow groove depth did not cause any sensory changes.

[0113] Example 2

[0114] The two relationship models obtained in Example 1 (i.e., the above-mentioned equations 1 and 2) were applied to a certain B-brand slim cigarette (cigarette circumference 17.10 mm ± 0.2 mm, length (30.0 mm + 60.0 mm) ± 0.5 mm) from Zhangjiakou Cigarette Factory for range expansion verification.

[0115] Randomly sampled B-brand cigarettes with a circumference of 17.10 mm ± 0.2 mm and a length of (30.0 mm + 60.0 mm) ± 0.5 mm. Based on the brand weight requirements and expected density standards (standard density at the compaction point and standard density at the non-compaction end), and using the two prediction models described above, we quickly inferred that the following specifications for the chopping disc with relatively good performance were as follows: deep groove arc length 20 mm, shallow groove arc length 20 mm, deep groove depth 2.5 mm, and shallow groove depth 2.0 mm. After replacing the chopping disc, samples were taken for physical performance testing. The test results are listed in Table 2:

[0116] Table 2 Comparison of specifications of brand B cigarette splitter discs

[0117] project Short Rate % Compacted end density Uncompacted end density Density difference Before adjustment 0.27 278.07 258.27 19.8 After adjustment 0.13 244.1 229.9 14.2

[0118] Comparing the characteristics of the empty head rate and density difference before and after the adjustment in Table 2, it can be seen that the specifications of the splitting disc after this adjustment are better matched, the empty head rate and density difference are smaller, and the overall quality of the cigarettes is better, indicating that the results of this model are accurate and reliable.

[0119] Density differences between the inner and outer rows of cigarettes were analyzed before and after the blade adjustment. The results showed that the density difference between the inner and outer rows was large before the adjustment, especially the density at the compaction end showed obvious fluctuations. After the adjustment, the density of the inner and outer rows matched well, indicating that the results of this model are accurate and reliable. Figure 4 , Figure 4 Numbers 1-60 are the comparison of the density of internal and external smoke exhaust branches before the chopping disc was adjusted (original 17-2015), and numbers 61-120 are the comparison of the density of internal and external smoke exhaust branches after the chopping disc was adjusted (new 20-2520).

[0120] The above results show that the above two relationship models are equally applicable to slim cigarettes of this size, and the results are accurate and reliable.

[0121] Example 3

[0122] Randomly sample C brand cigarettes with a circumference of 17.00 mm ± 0.2 mm and a length of (30.0 mm + 67.0 mm) ± 0.5 mm. Based on the brand weight requirements and expected density standards (standard density at the compaction point and standard density at the non-compacted end), two prediction models (i.e., Equations 1 and 2 above) were used to quickly infer a series of relatively good splitting disc specifications. Based on the density difference, the splitting disc specifications and their corresponding cigarette density information are listed in Table 3:

[0123] Table 3 Model prediction of splitting disc specifications and corresponding cigarette density information

[0124]

[0125] After the splitting disc was replaced, samples were taken for standard testing. The test results are listed in Table 4:

[0126] Table 4 Comparison of specifications of brand C cigarette splitter discs

[0127] project Short Rate % Compacted end density Uncompacted end density Density difference Before adjustment 0.43 282.13 243.54 38.59 After adjustment 0.18 188.72 187.43 1.29

[0128] Comparing the characteristics of the empty head rate and density difference before and after the adjustment in Table 4, it can be seen that the specifications of the splitting disc after this adjustment are better matched, the empty head rate and density difference are smaller, and the overall quality of the cigarettes is better, indicating that the results of this model are accurate and reliable.

[0129] Corresponding to the method embodiments of the above-mentioned embodiment 1 and embodiment 2, in embodiment 3 of the present invention, a device for automatically matching the density of slim cigarettes with the specifications of the splitting blade is also provided, such as Figure 5 The device is Figure 1 and Figure 2 The device corresponding to the prediction method and the determination method in the corresponding embodiment, that is, the device is implemented by means of a virtual device. Figure 1 The slim cigarette density prediction method and Figure 2 The slim cigarette density prediction method in the corresponding embodiment and the various virtual modules constituting the automatic matching device for slim cigarette density and splitting disc specifications can be executed by electronic devices, such as network devices, terminal devices, or servers. Specifically, the automatic matching device for slim cigarette density and splitting disc specifications in the embodiment of the present invention includes:

[0130] The information collection unit 01 is used to collect information on the specifications of the splitting disc and the corresponding density of slim cigarettes under the same rolling conditions; the specifications of the splitting disc include: arc length of deep groove, arc length of shallow groove, groove depth of deep groove, and groove depth of shallow groove; the cigarette density information includes: standard density of the compacted end and standard density of the non-compacted end;

[0131] Modeling unit 02, for establishing a first relationship model between compaction end density and chopping disc specifications, and a second relationship model between non-compaction end standard density and chopping disc specifications based on chopping disc specifications and corresponding cigarette density information;

[0132] The matching unit 03 is configured to predict the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the first relationship model and the second relationship model; or to determine the specifications of the splitting disc based on the preset cigarette density information, the first relationship model and the second relationship model.

[0133] It should be noted that the specific implementation and technical effects of the embodiments of the present invention can be referred to Figure 1 and Figure 2 The corresponding methods will not be described in detail here.

[0134] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the methods provided by other embodiments of the present invention.

[0135] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0136] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0137] In the several embodiments provided herein, it should be understood that the disclosed devices and methods may be implemented in other ways. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units via some interface, which may be electrical, mechanical, or other forms.

[0138] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0139] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0140] It should be understood that in the embodiments of the present application, the various embodiments and features can be combined with each other to solve the aforementioned technical problems.

[0141] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0142] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for predicting density of slim cigarettes, characterized in that: Including steps: S01) Under the same rolling conditions, using a variety of splitting discs of different specifications for rolling, and taking a number of slim cigarettes corresponding to each splitting disc as test samples; pre-treating the test samples according to the following conditions: equilibrating in a constant temperature and humidity environment at 22°C and 60% relative humidity for 48 hours; using a microwave moisture density meter to measure the measured density and measured moisture content of the compacted end of the test samples, and converting the measured measured density and measured moisture content into a standard density with a moisture content of 12%, that is, obtaining the standard density of the compacted end; and calculating the standard density of the non-compacted end using the same method; Collect information on the specifications of the splitting disc and the corresponding density of slim cigarettes; The specifications of the splitting blade include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density; S02), using a multiple regression analysis method, establishing a first relationship model between the density at the compacted end and the specifications of the splitting disc, and a second relationship model between the standard density at the non-compacted end and the specifications of the splitting disc based on the specifications of the splitting disc and the corresponding cigarette density information; The first relationship model is shown in Formula 1: ρ 实 = K1 + α1×L1 + α2×L2 + β1×D1 + β2×D2 Equation I In formula I, 实 is the standard density at the compaction end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K1 is a constant, α1, α2, β1 and β2 are coefficients; The second relationship model is shown in Formula II: ρ 非实 = K2 + γ1 × L1 + γ2 × L2 + ε1 × D1 + ε2 × D2 Equation II In formula II, ρ 非实 is the standard density of the non-compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K2 is a constant, γ1, γ2, ε1 and ε2 are coefficients; S03) Predicting the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the first relationship model, and the second relationship model.

2. The method for predicting density of slim cigarettes according to claim 1, wherein: The dimensions of the slim cigarettes are: cigarette length (90.0 mm to 97.0 mm) ± 0.5 mm, circumference (17.00 mm to 17.10 mm) ± 0.2 mm; in formula I: K1 = 363.6, α1 = 1.905, α2 = -2.053, β1 = 39.65, β2 = -108.8; in formula II: K2 = 343.8, γ1 = -0.08, γ2 = -2.078, ε1 = 0.99, ε2 = -43.

90.

3. A method for determining the specifications of a riving disc, characterized in that: Including steps: C01) Under the same rolling conditions, using a variety of splitting discs of different specifications for rolling, several slim cigarettes corresponding to each splitting disc were taken as test samples; the test samples were pretreated according to the following conditions: equilibrated in a constant temperature and humidity environment at 22°C and 60% relative humidity for 48 hours; using a microwave moisture density meter to measure the measured density and measured moisture content of the compacted end of the test sample, and converting the measured density and measured moisture content into a standard density with a moisture content of 12%, that is, the standard density of the compacted end; and calculating the standard density of the non-compacted end using the same method; Collect information on the specifications of the splitting disc and the corresponding density of slim cigarettes; The specifications of the splitting blade include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density; C02) using a multiple regression analysis method to establish a first relationship model between the density at the compacted end and the specifications of the splitting disc, and a second relationship model between the standard density at the non-compacted end and the specifications of the splitting disc based on the specifications of the splitting disc and the corresponding cigarette density information; The first relationship model is shown in Formula 1: ρ 实 = K1 + α1×L1 + α2×L2 + β1×D1 + β2×D2 Equation I In formula I, 实 is the standard density at the compaction end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K1 is a constant, α1, α2, β1 and β2 are coefficients; The second relationship model is shown in Formula II: ρ 非实 = K2 + γ1 × L1 + γ2 × L2 + ε1 × D1 + ε2 × D2 Equation II In formula II, ρ 非实 is the standard density of the non-compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K2 is a constant, γ1, γ2, ε1 and ε2 are coefficients; C03), according to the preset cigarette density information, the first relationship model and the second relationship model, determine the specifications of the chopping knife disk; C04), according to the specifications of the splitting disc determined in step C03), use the corresponding splitting disc to roll the slim cigarette products, conduct a smoking test on the prepared slim cigarette products, and determine the optimized specifications of the splitting disc based on the smoking test results.

4. The determination method according to claim 3, characterized in that: The dimensions of the slim cigarettes are: cigarette length (90.0 mm to 97.0 mm) ± 0.5 mm, circumference (17.00 mm to 17.10 mm) ± 0.2 mm; in formula I: K1 = 363.6, α1 = 1.905, α2 = -2.053, β1 = 39.65, β2 = -108.8; in formula II: K2 = 343.8, γ1 = -0.08, γ2 = -2.078, ε1 = 0.99, ε2 = -43.

90.

5. A device for automatically matching the density of slim cigarettes with the specifications of the splitting disc, characterized in that: include: The information collection unit is configured to roll cigarettes using a plurality of different sizes of splitting discs under the same rolling conditions, and to select a plurality of slim cigarettes corresponding to each splitting disc as test samples; the test samples are pre-treated according to the following conditions: the cigarettes are equilibrated in a constant temperature and humidity environment at 22° C. and 60% relative humidity for 48 hours; the measured density and moisture content of the compacted end of the test samples are measured using a microwave moisture density meter; the standard density of the compacted end is converted based on the measured density and moisture content to a standard density of 12% moisture content, thereby obtaining the standard density of the compacted end; and the standard density of the non-compacted end is calculated using the same method; Collect information on the specifications of the splitting disc and the corresponding density of slim cigarettes; The specifications of the splitting blade include: deep groove arc length, shallow groove arc length, deep groove groove depth and shallow groove groove depth; the cigarette density information includes: compacted end standard density and non-compacted end standard density; a modeling unit for establishing, by a multiple regression analysis method, a first relationship model between the density at the compacted end and the specifications of the splitting disc and corresponding cigarette density information, and a second relationship model between the standard density at the non-compacted end and the specifications of the splitting disc; The first relationship model is shown in Formula 1: ρ 实 = K1 + α1×L1 + α2×L2 + β1×D1 + β2×D2 Equation I In formula I, 实 is the standard density at the compaction end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K1 is a constant, α1, α2, β1 and β2 are coefficients; The second relationship model is shown in Formula II: ρ 非实 = K2 + γ1×L1 + γ2×L2 + ε1×D1 + ε2×D2 Equation II In formula II, ρ 非实 is the standard density of the non-compacted end, L1 is the arc length of the deep groove, L2 is the arc length of the shallow groove, D1 is the groove depth of the deep groove, D2 is the groove depth of the shallow groove, K2 is a constant, γ1, γ2, ε1 and ε2 are coefficients; The matching unit is used to predict the cigarette density information of the slim cigarette product based on the known specifications of the splitting disc, the first relationship model and the second relationship model; or to determine the specifications of the splitting disc based on preset cigarette density information, the first relationship model and the second relationship model.

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