Visual detection device and detection method for air permeability of pre-punched cigarette tipping paper

Abstract

The invention discloses a visual detection device and a detection method for air permeability of pre-punched cigarette tipping paper, the detection device comprises a closed transparent box, a sol air inlet at one end of the transparent box is connected to an atomizer through an aerosol air inlet pipe, the atomizer contains atomized liquid, the other end of the transparent box is provided with a cigarette holder, and the cigarette holder is provided with an air inlet. The clamping end of the cigarette holder is located in the transparent box and used for clamping cigarettes, the tail end of the cigarette holder is connected with the vacuum air inlet pipe, the vacuum air inlet pipe extends out of the transparent box and is connected with a vacuum opening of the negative pressure generator, and an air inlet of the negative pressure generator is connected with the compressed air inlet pipe through the air valve. And an exhaust port of the negative pressure generator is connected with a mixed gas exhaust pipe. Compared with the prior art, the method has the following advantages: the flow pattern of the air flow of the aerosol flowing through the ventilation area of the cigarette tipping paper in the detection process is visualized, so that the direct reason for the change of the air permeability of the cigarette tipping paper can be accurately identified and judged.

Description

Technical Field

[0001] The invention relates to a detection device and method for cigarette production, and in particular to a visual detection device and method for air permeability of pre-punched cigarette tipping paper. Background Art

[0002] With the advancement of tar reduction and harm reduction work in cigarettes, filter ventilation and dilution technology has been widely adopted because it is simple, reliable and has significant tar reduction effects. However, fluctuations in ventilation and dilution will have a significant impact on the release of tar, nicotine, carbon monoxide and sensory quality of cigarettes. Therefore, accurate control of the ventilation rate of cigarette filter segments is crucial. As an important component of the cigarette filter, the air permeability of the tipping paper is one of the key factors in regulating the ventilation rate of cigarettes. The air permeability of the tipping paper determines the smoothness of air circulation, which in turn affects the ventilation rate of cigarettes.

[0003] Pre-punched tipping paper, as the name implies, refers to tipping paper that is pre-punched with micro-holes as ventilation holes, which can form ventilation channels and achieve the purpose of diluting smoke. The ventilation rate of pre-punched cigarettes is mainly affected by the air permeability of the tipping paper, and the air permeability of the tipping paper is easily affected by the gluing effect during the cigarette tipping process. In the actual rolling process, if the non-glue area of ​​the pre-punched tipping paper is poorly controlled, the gluing area is offset, or glue overflow occurs, the air permeability of the ventilation area of ​​the tipping paper may decrease, thereby affecting the quality of the cigarette product. In addition, if the overlapping areas of the tipping paper are not firmly glued, there will be a very small amount of air leakage, which is manifested macroscopically as an increase in the air permeability of the tipping paper, which will also affect the sensory quality of the smoking process.

[0004] At present, for the sizing effect, colorants can be used to color the cigarette filter segment to evaluate the control effect of the glue-free area of ​​the pre-punched tipping paper. However, this method cannot judge the effect of sizing on the ventilation of the ventilation holes on the pre-punched tipping paper. If the glue control roller controls the glue unevenly, a very small amount of glue film may block some ventilation holes, but the colorant cannot be effectively identified. At this time, the use of colorants cannot determine the direct cause of the decrease in the air permeability of the tipping paper. In addition, the cigarette ventilation rate test can be used to indirectly judge the effect of the tipping process on the air permeability of the tipping paper, but it can only determine whether the air permeability decreases or increases, and it is also impossible to determine the direct cause of the change in air permeability. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a visual detection device and method for the air permeability of pre-perforated cigarette tipping paper, so as to accurately identify and determine the direct cause of the change in the air permeability of cigarette tipping paper, thereby providing technical support for optimizing and improving the processing technology of cigarette tipping process.

[0006] The present invention is achieved through the following technical solutions:

[0007] A visual detection device for the air permeability of pre-punched cigarette tipping paper includes a sealed transparent box, one end of the transparent box is provided with an aerosol inlet, the aerosol inlet of the transparent box is connected to an atomizer through an aerosol inlet pipe, the atomizer contains atomizing liquid, the other end of the transparent box is provided with a cigarette holder, the clamping end of the cigarette holder is located inside the transparent box, the clamping end of the cigarette holder is used to clamp the cigarette, the end of the cigarette holder is connected to a vacuum inlet pipe, the vacuum inlet pipe extends out of the transparent box and is connected to the vacuum port of a negative pressure generator, the air inlet of the negative pressure generator is connected to a compressed air inlet pipe through an air valve, and the exhaust port of the negative pressure generator is connected to a mixed gas exhaust pipe.

[0008] As a preferred solution of the above-mentioned visual detection device for the air permeability of the pre-perforated cigarette tipping paper, a gas flow detector is provided on the vacuum air inlet pipe.

[0009] As a preferred solution of the above-mentioned visual detection device for air permeability of pre-punched cigarette tipping paper, the aerosol air inlet of the transparent box and the cigarette holder are arranged opposite to each other on the left and right inside the transparent box.

[0010] As a preferred solution of the above-mentioned visual detection device for air permeability of pre-perforated cigarette tipping paper, the transparent box includes a box body and a box cover arranged on the top of the box body.

[0011] As a preferred embodiment of the above-mentioned visual detection device for air permeability of pre-perforated cigarette tipping paper, the particle diameter of the aerosol formed by the atomizer is between 0.01 μm and 10 μm.

[0012] The present invention also discloses a visual detection method for the air permeability of pre-perforated cigarette tipping paper. The detection method is based on the above detection device and is performed in the following steps:

[0013] Step 1: Clamp the end of the filter segment of the cigarette at the clamping end of the cigarette clamp, and make the ventilation area of ​​the cigarette filter segment tipping paper completely exposed in the inner cavity of the transparent box. Suppose the number of ventilation holes in the ventilation area of ​​the cigarette filter segment tipping paper is N. 0 ;

[0014] Step 2: Start the atomizer and the negative pressure generator, open the air valve, form a vacuum negative pressure at the vacuum port of the negative pressure generator, and suck the gas in the inner cavity of the transparent box through the vacuum air inlet pipe; at the same time, the atomized liquid in the atomizer is atomized to form an aerosol, and under the action of negative pressure suction, the aerosol enters the inner cavity of the transparent box through the aerosol air inlet pipe, and enters the vacuum air inlet pipe through the smoke column section of the cigarette clamped on the cigarette holder and the ventilation area of ​​the filter section, enters the negative pressure generator through the vacuum air inlet pipe, and is mixed with the compressed air and discharged through the mixed gas exhaust pipe;

[0015] Step 3, observing the flow state of the aerosol in the inner cavity of the transparent box, when it is observed that the aerosol in the inner cavity of the transparent box continuously passes through the ventilation holes in the ventilation area of ​​the cigarette filter segment, counting the number of flow paths through which the aerosol flows through the ventilation holes in the ventilation area of ​​the cigarette filter segment, and recording it as N;

[0016] Step 4: Calculate the air permeability index A of the cigarette filter tipping paper by the following formula (1):

[0017]

[0018] Step 5: Determine the air permeability of the cigarette tipping paper according to the calculated characterization index A. The determination process is as follows:

[0019] When A=1, and it is observed that the aerosol enters the filter segment only through the ventilation holes of the tipping paper, the air permeability of the cigarette tipping paper is judged to be normal;

[0020] When A<1, and no aerosol is observed to flow into the filter segment from some ventilation holes of the tipping paper, the air permeability of the cigarette tipping paper is judged to be abnormal;

[0021] When A>1, and aerosol is observed to flow into the cigarette through the overlap of the tipping paper or the joint between the tipping paper and the cigarette paper, the air permeability of the cigarette tipping paper is judged to be abnormal.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The present invention provides a visual detection device and method for the air permeability of pre-punched cigarette tipping paper. The device and method utilize the light scattering effect of aerosols to intuitively display the spatial distribution and flow direction of gas flow by releasing visible aerosols, and visualize the airflow pattern of aerosols flowing through the ventilation area of ​​cigarette tipping paper during the detection process, thereby providing more direct evidence for evaluating the air permeability of finished cigarette tipping paper. In addition, the present invention uses a quantitative method to characterize the tipping effect of pre-punched finished cigarette tipping paper. According to the characterization index, the direct cause of the change in the air permeability of pre-punched finished cigarette tipping paper can be effectively identified, thereby providing technical support for optimizing and improving the processing technology of the cigarette tipping process. In addition, the device and method of the present invention have the advantages of easy operation and accurate results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the detection device of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the detection device of the present invention from another viewing angle.

[0026] Figure 3 It is a flattening diagram of the tipping paper of the present invention after it is unfolded.

[0027] Numbers in the figure: 1 transparent box, 2 box body, 3 box cover, 4 aerosol air inlet pipe, 5 atomizer, 6 cigarette holder, 7 cigarette, 8 vacuum air inlet pipe, 9 gas flow detector, 10 negative pressure generator, 11 vacuum port, 12 air inlet, 13 air valve, 14 compressed air inlet pipe, 15 exhaust port, 16 mixed gas exhaust pipe, 17 tipping paper, 18 ventilation area, 19 ventilation holes. DETAILED DESCRIPTION

[0028] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0029] See also Figures 1 to 3 The present embodiment discloses a visual detection device for the air permeability of pre-perforated cigarette tipping paper, comprising a sealed transparent box 1, which can be an acrylic box, and comprises a box body 2 and a box cover 3 which is arranged on the top of the box body 2 and can be opened and closed. An aerosol inlet is provided at one end of the transparent box 1, and the aerosol inlet of the transparent box 1 is connected to an atomizer 5 through an aerosol inlet pipe 4, and the atomizer 5 contains an atomized liquid. A cigarette holder 6 is provided at the other end of the transparent box 1, and the aerosol inlet of the transparent box 1 and the cigarette holder 6 are arranged opposite to each other on the left and right inside the transparent box 1. The clamping end of the cigarette holder 6 is located inside the transparent box 1, and the clamping end of the cigarette holder 6 is used to clamp a cigarette 7. The end of the cigarette holder 6 is connected to a vacuum inlet pipe 8, and a gas flow detector 9 is provided on the vacuum inlet pipe 8, which can detect the gas flow through the vacuum inlet pipe 8 in real time. The vacuum air inlet pipe 8 extends out of the transparent box 1 and is connected to the vacuum port 11 of the negative pressure generator 10. The air inlet 12 of the negative pressure generator 10 is connected to the compressed air inlet pipe 14 through the air valve 13. The compressed air inlet pipe 14 is connected to an external compressed air source. The exhaust port 15 of the negative pressure generator 10 is connected to the mixed gas exhaust pipe 16. The air valve 13 can be a ball valve, and the flow rate of compressed air in the compressed air inlet pipe 14 can be controlled by controlling the opening of the air valve 13.

[0030] Among them, the atomizing liquid can be propylene glycol or propylene glycol liquid. The liquid particles formed after atomization by the atomizer 5 are suspended in the air medium to form an aerosol. The particle diameter of the aerosol is between 0.01μm and 10μm. The light scattering effect of the aerosol is used to make the aerosol appear visible white. When the visible aerosol flows with the airflow, its flow path can be identified and counted by the naked eye.

[0031] This embodiment also discloses a visual detection method for the air permeability of pre-perforated cigarette tipping paper. The detection method is based on the above-mentioned detection device and is performed in the following steps:

[0032] Step 1: Clamp the filter tip end of the cigarette 7 at the clamping end of the cigarette holder 6, and make the ventilation area 18 of the tipping paper 17 of the filter tip of the cigarette 7 completely exposed in the inner cavity of the transparent box 1. The cigarette column of the cigarette 7 is suspended in the inner cavity of the transparent box 1. The number of ventilation holes 19 in the ventilation area 18 of the tipping paper 17 of the filter tip of the cigarette 7 is N. 0 ;

[0033] Step 2: Start the atomizer 5 and the negative pressure generator 10, open the air valve 13, and the vacuum port 11 of the negative pressure generator 10 forms a vacuum negative pressure, and the gas in the inner cavity of the transparent box 1 is sucked through the vacuum air inlet pipe 8; at the same time, the atomized liquid in the atomizer 5 is atomized to form an aerosol. Under the action of negative pressure suction, the aerosol enters the inner cavity of the transparent box 1 through the aerosol air inlet pipe 4, and enters the vacuum air inlet pipe 8 through the smoke column section of the cigarette 7 clamped on the cigarette holder 6 and the ventilation area 18 of the filter section, and enters the negative pressure generator 10 through the vacuum air inlet pipe 8, and is mixed with the compressed air and discharged through the mixed gas exhaust pipe 16;

[0034] Step 3, observing the flow state of the aerosol in the inner cavity of the transparent box 1. When it is observed that the aerosol in the inner cavity of the transparent box 1 continuously passes through the ventilation holes 19 of the ventilation area 18 of the filter segment of the cigarette 7, the number of flow paths through which the aerosol flows through the ventilation holes 19 of the ventilation area 18 of the filter segment of the cigarette 7 is counted, and recorded as N;

[0035] Step 4: Calculate the air permeability index A of the tipping paper 17 of the filter segment of the cigarette 7 by the following formula (1):

[0036]

[0037] Step 5: Determine the air permeability of the cigarette tipping paper according to the calculated characterization index A. The determination process is as follows:

[0038] When A=1, and it is observed that the aerosol enters the filter segment only through the ventilation holes 19 of the tipping paper 17, the air permeability of the tipping paper of the cigarette is determined to be normal; this indicates that the glue-free area is accurately controlled during the cigarette tipping process, there is no glue overflow and clogging of the holes, and the various areas of the tipping paper 17 are firmly glued;

[0039] When A<1, and no aerosol is observed to flow into the filter segment from some of the ventilation holes 19 of the tipping paper 17, the air permeability of the cigarette tipping paper is determined to be abnormal; this indicates that some of the ventilation holes 19 in the ventilation area 18 of the tipping paper 17 are blocked and cannot play a ventilation role; the smaller the A value, the more the number of blocked ventilation holes 19 of the tipping paper 17, and the lower the air permeability of the cigarette tipping paper 17;

[0040] When A>1, and aerosol is observed to flow into the interior of the cigarette 7 through the overlap of the tipping paper 17 or the joint between the tipping paper 17 and the cigarette paper, the air permeability of the cigarette tipping paper is determined to be abnormal; this indicates that some areas of the tipping paper 17 are not firmly adhered during the bonding process, and there is a very small amount of air leakage, which is manifested macroscopically as an increase in the air permeability of the tipping paper 17; the larger the A value, the more areas where the tipping paper 17 is not firmly adhered, which is manifested macroscopically as a greater air permeability of the cigarette tipping paper 17.

[0041] The applicant uses the above detection device and detection method to detect experimental cigarettes 7 of the same specification with a circumference of 24.4 mm. The tipping paper 17 wrapped with the filter segment of the cigarette 7 is a rectangular shape after unfolding. The unfolded tipping paper 17 has an overall length of 30 mm and a width of 27 mm. The rectangular non-glue area in the middle is the ventilation area 18. The non-glue ventilation area 18 has a length of 22 mm and a width of 8 mm. Double rows of ventilation holes 19 are arranged in the ventilation area 18 of the tipping paper 17. The total number of ventilation holes 19 in the double rows of ventilation holes 19 is N. 0 20. During the test, the gas flow rate in the vacuum air inlet pipe 8 of the negative pressure generator 10 is controlled at 17.5 mL / s by adjusting the opening of the air valve 13, which is consistent with the air flow rate of ventilation rate test in the national standard of "Cigarettes" to ensure the comparability of the data.

[0042] Example 1

[0043] One of the experimental cigarettes 7 is selected and tested according to the above-mentioned testing method. The number of flow paths N for aerosol flow through the ventilation holes 19 of the ventilation area 18 of the filter segment of the cigarette 7 is statistically obtained to be 20. Then, according to formula (1), the characterization index A=1 of the air permeability of the tipping paper 17 of the filter segment of the cigarette 7 is calculated, and it is observed that the aerosol enters the interior of the filter segment only through the ventilation holes 19 of the tipping paper 17. Based on this, it can be determined that the air permeability of the pre-punched cigarette tipping paper 17 is normal, indicating that the non-glue area is accurately controlled during the cigarette tipping process, there is no overflow of glue to block the holes, and the various areas of the tipping paper 17 are firmly glued.

[0044] Example 2

[0045] A second experimental cigarette 7 is selected and tested according to the above-mentioned testing method. The number of flow paths N through which the aerosol flows through the ventilation holes 19 in the ventilation area 18 of the filter segment of the cigarette 7 is statistically obtained to be 18. Then, according to formula (1), the characterization index A=0.9 of the air permeability of the tipping paper 17 of the filter segment of the cigarette 7 is calculated, that is, A<1. Moreover, it is observed that no aerosol flows into the interior of the filter segment through some of the ventilation holes 19 of the tipping paper 17. Based on this, it can be determined that the air permeability of the tipping paper of the cigarette is abnormal, and some of the ventilation holes 19 are blocked and cannot play a ventilation and dilution role, which will affect the tar content, nicotine, carbon monoxide release and sensory quality of the cigarette.

[0046] Example 3

[0047] The third experimental cigarette 7 was selected and tested according to the above-mentioned testing method. The number of flow paths N for aerosol flow through the ventilation holes 19 of the ventilation area 18 of the filter segment of the cigarette 7 was found to be 22. According to formula (1), the characterization index A=1.1 of the air permeability of the tipping paper 17 of the filter segment of the cigarette 7 was calculated, that is, A>1. It was observed that the aerosol flowed into the interior of the cigarette 7 through the overlap of the tipping paper 17 or the joint between the tipping paper 17 and the cigarette paper. Based on this, it can be determined that the air permeability of the tipping paper of the cigarette is abnormal, and some areas of the overlapping part of the tipping paper 17 are not firmly adhered, and there is a very small amount of air leakage; this indicates that during the cigarette tipping process, the amount of glue applied to some glued areas of the tipping paper 17 is small, and the gluing effect of the tipping paper 17 is poor.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A visual detection device for the air permeability of pre-perforated cigarette tipping paper, characterized in that: It includes a sealed transparent box, one end of which is provided with an aerosol inlet, the aerosol inlet of the transparent box is connected to the atomizer through an aerosol inlet pipe, the atomizer is filled with atomizing liquid, and the other end of the transparent box is provided with a cigarette holder, the clamping end of the cigarette holder is located inside the transparent box, the clamping end of the cigarette holder is used to clamp the cigarette, the end of the cigarette holder is connected to a vacuum inlet pipe, the vacuum inlet pipe extends out of the transparent box and is connected to the vacuum port of a negative pressure generator, the inlet of the negative pressure generator is connected to the compressed air inlet pipe through an air valve, and the exhaust port of the negative pressure generator is connected to a mixed gas exhaust pipe.

2. The visual detection device for air permeability of pre-perforated cigarette tipping paper according to claim 1, characterized in that: A gas flow detector is provided on the vacuum air inlet pipe.

3. The visual detection device for air permeability of pre-perforated cigarette tipping paper according to claim 1, characterized in that: The aerosol air inlet of the transparent box and the cigarette holder are arranged opposite to each other on the left and right sides in the transparent box.

4. The visual detection device for air permeability of pre-perforated cigarette tipping paper according to claim 1, characterized in that: The transparent box comprises a box body and a box cover which is arranged on the top of the box body.

5. The visual detection device for air permeability of pre-perforated cigarette tipping paper according to claim 1, characterized in that: The particle diameter of the aerosol formed by the atomizer is between 0.01 μm and 10 μm.

6. A visual detection method for the air permeability of pre-perforated cigarette tipping paper, characterized in that: The detection method is based on the detection device according to any one of claims 1 to 5, and the detection method is carried out in sequence according to the following steps: Step 1: Clamp the end of the filter segment of the cigarette at the clamping end of the cigarette clamp, and make the ventilation area of ​​the cigarette filter segment tipping paper completely exposed in the inner cavity of the transparent box, and assume that the number of ventilation holes in the ventilation area of ​​the cigarette filter segment tipping paper is N0; Step 2: Start the atomizer and the negative pressure generator, open the air valve, form a vacuum negative pressure at the vacuum port of the negative pressure generator, and suck the gas in the inner cavity of the transparent box through the vacuum air inlet pipe; at the same time, the atomized liquid in the atomizer is atomized to form an aerosol, and under the action of negative pressure suction, the aerosol enters the inner cavity of the transparent box through the aerosol air inlet pipe, and enters the vacuum air inlet pipe through the smoke column section of the cigarette clamped on the cigarette holder and the ventilation area of ​​the filter section, enters the negative pressure generator through the vacuum air inlet pipe, and is mixed with the compressed air and discharged through the mixed gas exhaust pipe; Step 3, observing the flow state of the aerosol in the inner cavity of the transparent box, when it is observed that the aerosol in the inner cavity of the transparent box continuously passes through the ventilation holes in the ventilation area of ​​the cigarette filter segment, counting the number of flow paths through which the aerosol flows through the ventilation holes in the ventilation area of ​​the cigarette filter segment, and recording it as N; Step 4: Calculate the air permeability index A of the cigarette filter tipping paper by the following formula (1): Step 5: Determine the air permeability of the cigarette tipping paper according to the calculated characterization index A. The determination process is as follows: When A=1, and it is observed that the aerosol enters the filter segment only through the ventilation holes of the tipping paper, the air permeability of the cigarette tipping paper is judged to be normal; When A<1, and no aerosol is observed to flow into the filter segment from some ventilation holes of the tipping paper, the air permeability of the cigarette tipping paper is judged to be abnormal; When A>1, and aerosol is observed to flow into the cigarette through the overlap of the tipping paper or the joint between the tipping paper and the cigarette paper, the air permeability of the cigarette tipping paper is judged to be abnormal.

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