Cigar inner blank shaping time calculation method based on tobacco rheological characteristics

Abstract

The invention discloses a cigar inner blank shaping time calculation method based on tobacco rheological characteristics, which comprises the following steps: according to the viscoelasticity of a biomass polymer, quantifying the rheological characteristic parameter stress relaxation time of the cigar inner blank by detecting the change of stress along with time in the shaping process of the cigar inner blank, and calculating the shaping time of the cigar inner blank. And a mathematical model of stress relaxation time and shaping time is established, so that the shaping time of the inner blank of the cigar cigarette can be quickly, objectively and accurately calculated. Instrument detection is used for replacing manual experience, errors of subjective judgment are eliminated, and the quality of cigar products can be improved; the cigar inner blank shaping time can be quickly judged according to the characteristics of the raw materials, so that the production efficiency and the equipment turnover rate are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of handmade cigar processing technology, and in particular to a method for rapidly and accurately calculating the curing time of the inner body of a handmade cigar based on the rheological properties of tobacco. Background Technology

[0002] As a high-end cigarette product, the appearance quality of handmade whole-leaf cigars influences consumer psychology. Therefore, cigar shapers are commonly used to shape the inner blanks, thereby improving the appearance and shape of the cigar. The main process of inner blank shaping involves placing the inner blank in a shaper under specific temperature and humidity conditions. This allows the humidity and temperature of the inner blank to become more balanced, and the stress generated between the cigar leaves is gradually released due to the pressure from the shaper, thus achieving a stable physical structure.

[0003] Currently, the main methods used in the industry to determine the completion of cigar inner shaping rely on human experience and fixed time patterns. Experienced technicians usually judge by subjective means such as touch and pressing rebound, or simply set a fixed shaping time range for the inner shaping process. This has the disadvantages of being highly subjective, inefficient, and ignoring the differences in raw materials. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for calculating the curing time of cigar inner tubes based on the rheological properties of tobacco. This method objectively, quantitatively, and quickly calculates the optimal curing time required for curing the inner tubes of cigar inner tubes of different specifications, thereby improving the quality of handmade cigar products and increasing production efficiency. It also provides technical support for optimizing the curing process of handmade cigar inner tubes.

[0005] This invention is achieved through the following technical solution: The method for calculating the endoderm setting time of a cigar cigarette based on the rheological properties of tobacco, as described in this invention, is characterized by the following steps: Step 1, m The inner linings of cigar sticks of the same specification were placed in equilibrium under constant temperature conditions. Step 2: At the set compression rate, use a texture analyzer to separate the equilibrium-resting materials. m After compressing each cigar to the set compression distance, keep the indenter of the texture analyzer stationary and record the compression data simultaneously. m The stress {σ} inside a cigar varies over time. x ( t )| x =1,2,…, m}, where σ x ( t )express t Time of the first xStress in the inner lining of a cigar; Step 3, Calculation m The curing time of an individual cigar inner casing { t x | x =1,2,…, m},in, t x Indicates the first x The setting time for the inner endplate of a cigar: Step 3.1, with σ x ( t () as the ordinate, with t Using x as the x-axis, thus constructing the first... x σ of the endomorph of a cigar cigarette x ( t )- t curve; Step 3.2: Constructing the generalized Maxwell model n The Maxwell elements are connected in parallel, and equation (1) is used to process the first Maxwell element. x σ of the endomorph of a cigar cigarette x ( t )- t The curve is fitted to obtain the first... x Stress relaxation time series of the inner embryo of a cigar { T 1, T 2 ,…, T i ,…, T n},in, T i Indicates the first i Stress relaxation time of a Maxwell element; (1) In equation (1), s i Indicates the first i Maximum stress of a Maxwell element s e This represents the equilibrium stress of the parallel springs in the generalized Maxwell model; Step 3.3: Calculate the first step using equation (2). x The setting time of the inner endplate of a cigar. t x : (2) In equation (2), For safety factor; Step 4, using formula (3) to calculate the setting time of the same specification of cigar inner embryo H : (3) The electronic device of the present application comprises a memory and a processor, and is characterized in that the memory is used to store a program supporting the processor to execute the method for calculating the setting time of the cigar inner embryo based on the rheological properties of tobacco, and the processor is configured to execute the program stored in the memory.

[0006] The computer readable storage medium of the present application has a computer program stored thereon, and is characterized in that the computer program is executed by the processor to perform the steps of the method for calculating the setting time of the cigar inner embryo based on the rheological properties of tobacco.

[0007] Compared with the prior art, the present application has the following beneficial effects: The present application detects the change of stress with time during the setting process of the cigar inner embryo by using a texture analyzer device according to the viscoelasticity of biomass polymers, obtains the rheological property parameter stress relaxation time by physical model fitting, and establishes a mathematical model of stress relaxation time and setting time, so as to objectively, quantitatively and quickly calculate the setting time of the cigar inner embryo. The method uses instrument detection to replace manual experience, eliminates the error of subjective judgment, realizes the standardization of the setting time of the cigar inner embryo, and can improve the quality of the cigar product. The setting time of the cigar inner embryo can be calculated according to the characteristics of the raw material, which can ensure sufficient setting of the inner embryo and prevent loose structure caused by insufficient setting, and can also prevent over-setting of the inner embryo, thereby significantly improving the production efficiency and equipment turnover rate. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a stress change curve with time during the compression test process of the present application; Figure 2 is a stress change curve with time during the stress relaxation stage and a fitting curve of the present application. DETAILED DESCRIPTION

[0009] In this embodiment, a method for calculating the setting time of the cigar inner embryo based on the rheological properties of tobacco, by detecting the change of stress with time during the setting process of the cigar inner embryo, using a generalized Maxwell model to quantitatively fit the rheological property parameter stress relaxation time, and establishing a mathematical model of stress relaxation time and optimal setting time, thereby calculating the setting time of the cigar inner embryo H The calculation steps are as follows: Step 1, place m cigar inner embryos of the same specification in a constant temperature and humidity condition of 25℃ and RH60% for equilibrium and static placement; Step 2: Set the compression speed, trigger force (i.e., when the probe senses this minimum force to start recording data), compression time, and compression distance according to the cigar inner fabric specifications. The compression distance should be set so that the press head does not contact the test platform fixture when it reaches the compression distance; otherwise, the test data will be distorted. At the set compression speed, use a texture analyzer to separate the balanced and stationary cigars... m After compressing each cigar to the set compression distance, keep the indenter of the texture analyzer stationary and record the compression data simultaneously. m The stress {σ} inside a cigar varies over time. x ( t )| x =1,2,…, m}, where σ x ( t )express t Time of the first x The stress inside a cigar cigarette blank. The compression process is divided into two stages. The initial stage is when the unshaped cigarette blank is compressed to the set compression distance, which is the compression stage. The second stage is when the compression distance remains unchanged and the stress inside the cigarette blank gradually relaxes, which is the stress relaxation stage.

[0010] Step 3, Calculation m The curing time of an individual cigar inner casing { t x | x =1,2,…, m},in, t x Indicates the first x The setting time for the inner endplate of a cigar: Step 3.1, with σ x ( t () as the ordinate, with t Using x as the x-axis, thus constructing the first... x σ of the endomorph of a cigar cigarette x ( t )- t curve; Step 3.2: Constructing the generalized Maxwell model n The Maxwell elements are connected in parallel, and equation (1) is used to process the first Maxwell element. x σ of the endomorph of a cigar cigarette x ( t )- t The curve is fitted to obtain the first... x Stress relaxation time series of the inner embryo of a cigar { T 1, T 2 ,…, Ti ,…, T n},in, T i Indicates the first i Stress relaxation time of a Maxwell element T i The larger the value, the slower the stress relaxation of the corresponding model.

[0011] (1) In equation (1), s i Indicates the first i Maximum stress of a Maxwell element s e This represents the equilibrium stress of the parallel springs in the generalized Maxwell model; Step 3.3: Calculate the first step using equation (2). x The setting time of the inner endplate of a cigar. t x : (2) In equation (2), For safety factors, the value should be greater than or equal to 5; when δ is 100, except for the equilibrium stress... s e In addition, the residual stress inside the cigarette inner blank has been almost completely relaxed, which can ensure that the cigarette inner blank will not deform after the pressure head is removed.

[0012] Step 4: Calculate the setting time of the inner blank of a cigar of the same specification using formula (3). H : (3) In this embodiment, an electronic device includes a memory and a processor. The memory stores a program that supports the processor in executing the above-described method for calculating the endofibril setting time of cigars based on tobacco rheological properties. The processor is configured to execute the program stored in the memory.

[0013] In this embodiment, a computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the above-described method for calculating the endoderm setting time of cigars based on tobacco rheological properties.

[0014] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Example 1 Taking the shaping process of a certain specification of cigar inner blank as an example, the diameter of the inner blank is 20mm. After wrapping the filler with a binder, it is rolled into an inner blank. With even pressure and repeated rolling, its outer diameter is approximately 24mm. According to the specifications of the cigar inner blank, a clamp and an inner blank shaping pressure head are selected, both with an inscribed circle radius of 10mm, to ensure that the inner blank is pressed and shaped to the standard specified diameter.

[0016] The fixture is fixed on the test platform. The indenter shaping head is connected to the pressure sensor of the texture analyzer via a rigid connecting rod. The pressure sensor has a range of 0~500N. The unshaped cigarette indenter is placed on the fixture. The pre-test speed is set to 5mm / s, the trigger force to 0.01N, the test speed to 1mm / s, and the maximum compression distance to the outer diameter of the indenter as specified in the technical standard for this specification of handmade cigar, which is 20mm. The indenter shaping head stops moving when it reaches the maximum compression distance and is held for 600s. The rebound speed is 5mm / s. The texture analyzer is started to perform a compression test on the cigarette indenter. The equipment automatically records the stress data over time. The results are as follows: Figure 1 As shown, the test process includes two parts: a compression stage and a stress relaxation stage. As the inner preform shaping head is slowly compressed to the maximum compression distance, the stress gradually increases to the maximum value. Subsequently, the position of the inner preform shaping head remains unchanged at the set compression distance, and the stress in the inner preform of the cigarette is gradually released to the equilibrium stress.

[0017] Extract the stress relaxation stage test data, subtract the t1 value from all data in this time period, i.e., the compression stage time; then use σ x ( t () as the ordinate, with t Using the x-axis as the constitutive equation of the five-element Maxwell model, the first element is used to... x σ x ( t )- t Curve expansion and data fitting were used to obtain its rheological property parameters—stress relaxation time. T 1 , T 2 Its expression is:

[0018] The fitting results are as follows Figure 2 As shown, the constitutive equations of the five-element Maxwell model fit well. Five parallel experiments were conducted on the cigar preform of this specification, and the data were fitted. The stress relaxation time of the five parallel experiments was... T 1 , T 2 Parameter fitting results and endoderm setting time of each cigar. tx The calculation results are shown in Table 1, where The value is 100, the remaining stress in the inner embryo of the cigarette has been almost completely relaxed, and it can be ensured that the inner embryo of the cigarette will not be deformed after the removal of the pressure head, so the setting time of the inner embryo of the cigar cigarette of the specification H is:

[0019] According to the calculated setting time of the inner embryo of the cigar cigarette H , the setting time of the inner embryo of the batch of cigar cigarettes is set to 2 hours, the compression setting effect of the inner embryo of the cigarette is good, and the accuracy of the prediction result of the technical method for quickly determining the setting time required by the inner embryo of the cigar cigarette is verified. Compared with the previous fixed range of 4-16 hours for cigarette setting, at least 2 hours is saved in this production.

[0020] Table 1: Fitting results of stress relaxation time parameters and calculation results of inner embryo setting time of cigarette

[0021] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for calculating the internal embryo setting time in a cigar based on the rheological properties of the tobacco, characterized by, are calculated as follows: Step 1, equilibrate m cigar inner embryo of the same specification under constant temperature and constant temperature conditions. Step 2: At the set compression rate, use a texture analyzer to separate the equilibrium-resting materials. m After compressing each cigar to the set compression distance, keep the indenter of the texture analyzer stationary and record the compression data simultaneously. m The stress {σ} inside a cigar varies over time. x ( t )| x =1,2,…, m }, where σ x ( t )express t Time of the first x Stress in the inner lining of a cigar; Step 3, Calculation m The curing time of an individual cigar cigarette inner embryo τ x | x =1,2,…, m },in, τ x Indicates the first x The setting time for the inner endplate of a cigar: Step 3.1, with σ x ( t ) as the ordinate and with t as the abscissa, a σ x curve of the inner embryo of the first cigar is constructed; Step 3.2, with σ x ( t ) as the ordinate and with t as the abscissa, a σ x curve of the inner embryo of the second cigar is constructed; Step 3.3, with σ x ( t ) as the ordinate and with t as the abscissa, a σ x curve Step 3.2: Constructing the generalized Maxwell model n The Maxwell elements are connected in parallel, and equation (1) is used to process the first Maxwell element. x σ of the endomorph of a cigar cigarette x ( t )- t The curve is fitted to obtain the first... x Stress relaxation time series of the inner embryo of a cigar { T 1, T 2 ,…, T i ,…, T n },in, T i Indicates the first i Stress relaxation time of a Maxwell element; (1) In formula (1), σ i denotes the maximum stress of the i Maxwell unit, σ e denotes the equilibrium stress of the parallel spring in the generalized Maxwell model; Step 3.3, calculating the time to size of the inner embryo of the cigar from the value of formula (2) x τ x :​ (2) In formula (2), is a safety factor; Step 4, Calculate the setting time of the same gauge of cigar inner embryo by using formula (3) H : (3)。 2. An electronic device comprising a memory and a processor, characterized in that The memory is for storing a program supporting the processor to perform the method of calculating the setting time of the embryo in a cigar according to any one of claims 1 based on the rheological properties of the tobacco.

3. A computer-readable storage medium having stored thereon a computer program, characterized in that The computer program, when run by the processor, performs the steps of the method of calculating the setting time of the embryo in a cigar based on the rheological properties of the tobacco according to any one of claims 1.

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