A method of determining a position of a filament bundle and a method of adjusting a position of a filament bundle

Abstract

The application discloses a method for determining the position of a tow, adjusting a tow balancing machine to the lowest position; measuring the distance between the highest surface of a tow package and the ground, and dividing the distance from low to high into a first gradient to an Nth gradient, moving the tow package to the first gradient to the Nth gradient by using the tow balancing machine, sampling at each gradient, comparing the draw resistance index deviation values of the filter rod samples at each gradient, obtaining the gradient where the sample with the lowest draw resistance index deviation value is located, and determining the position of the tow. The application can more accurately find the optimal balancing position of the tow during opening, the draw resistance index deviation of the filter rod is the smallest at the position, and the stability of the smoke index is improved. The application also provides a method for adjusting the position of the tow, which can make the tow package be located at the above-mentioned position of the tow package by increasing the height of the opening machine swing arm and / or lowering the ground reference at the lower part of the balancing machine. The adjusting process is simple, the cost is low, and frequent adjustment is not needed.

Description

Technical Field

[0001] This invention relates to the field of cigarettes, and in particular to a method for determining the position of the cigarette bundle and a method for adjusting the position of the cigarette bundle. Background Technology

[0002] In the cigarette production process, filter rods are an extremely important raw material. After the filter rods are formed, under the condition that the average draw resistance is basically stable, the magnitude of the draw resistance deviation directly affects the draw resistance deviation of the cigarette, and also directly affects the stability of the cigarette smoke indicators, thus affecting the consumer's smoking experience.

[0003] According to the filter rod manufacturing process, as shown in the attached document Figure 1 As shown, when the opening machine 100 opens the filter bundle, the tension in the bundle inevitably causes it to sway as it is pulled out from the bundle 200 along the direction of the arrow, thus affecting the draw resistance deviation of the filter rod. The bundle balancing machine 300 can position the bundle at a certain height, making the bundle more stable at that position, thereby stabilizing the draw resistance deviation and achieving stable control of cigarette smoke indicators. However, currently, after installing the balancing machine, the photoelectric switch is defaulted to the highest position, which is the position when a new bundle of bundles is first used. This way, as the bundle decreases, the balancing machine rises continuously, ensuring that all bundles in the bundle are at the highest position to stabilize the bundle tension. However, practice has shown that when the bundle is opened at this position, the draw resistance deviation of the produced filter rod is large, making it difficult to achieve efficient control of the stability of cigarette smoke indicators.

[0004] Chinese patent CN103815544A discloses a device and method for controlling the opening height of a filament bundle in a forming machine. The main solution involves a height detection mechanism continuously detecting the height of the filament bundle during the opening process and transmitting the detected height signal to a control mechanism. The control mechanism then uses a drive mechanism to control a lifting mechanism, which in turn lifts the support mechanism upwards, keeping the filament bundle in a constant position and ensuring its height remains constant throughout the opening process. However, this patent only addresses how to maintain the filament bundle's position during the opening process; it does not address the impact of the filament bundle's position on the filter rod's suction resistance, nor does it provide a method for determining the optimal filament bundle position for the filter rod's performance. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that currently, the opening position of the fiber bundle is directly assumed to be the highest position during opening, resulting in a filter rod with an excessively high draw resistance, making it difficult to achieve efficient control of the stability of cigarette smoke indicators. This invention provides a method for determining the fiber bundle position and a method for adjusting the fiber bundle position to determine the optimal balance height of the fiber bundle, thereby reducing the deviation of the filter rod's draw resistance and achieving efficient control of the stability of cigarette smoke indicators.

[0006] To solve the above technical problems, the embodiment of the present application discloses a method for determining the position of a tow, wherein a tow package containing a tow is placed on a tow balancing machine, and the method comprises the following steps:

[0007] An adjusting step of adjusting the tow balancing machine to the lowest position;

[0008] A gradient dividing step of measuring the distance between the highest surface of the tow in the tow package and the ground and dividing the distance into a plurality of gradients, recording the gradient values, and sequentially recording the gradient values from low to high as a first gradient, a second gradient,..., and an Nth gradient;

[0009] A sample selecting step of adjusting the tow balancing machine when the remaining amount of the tow in the tow package reaches a preset value, so that the first distance between the highest surface of the tow in the tow package and the ground is the first gradient, the second gradient,..., and the Nth gradient, respectively, selecting a filter rod produced when the first distance is the first gradient as a first detection sample, selecting a filter rod produced when the first distance is the second gradient as a second detection sample, and selecting a filter rod produced when the first distance is the Nth gradient as an Nth detection sample;

[0010] A position determining step of measuring the draw resistance index of the first detection sample to the Nth detection sample, comparing the draw resistance indexes of the first detection sample to the Nth detection sample, determining the detection sample with the lowest draw resistance index, and taking the gradient value corresponding to the detection sample with the lowest draw resistance index as the height value of the position of the tow.

[0011] By adopting the above technical solution, the distance between the highest surface of the tow in the tow package and the ground is divided into a plurality of gradients from low to high by lowering the balancing machine to the lowest position. When the remaining amount of the tow in the tow package reaches a preset value, the filter rods produced when the tow is located at each gradient are sampled, the draw resistance index of the filter rod when the tow is located at each gradient is compared, the gradient with the smallest draw resistance index is found, which is the height value of the position of the tow, and the draw resistance index of the filter rod produced when the tow is located at the height is the smallest. The method can more accurately find the optimal balancing position of the tow package, can maintain the tow at the position during the opening process, and thus reduces the draw resistance index of the filter rod and improves the stability of smoke indicators.

[0012] As a specific embodiment, in the sample selecting step, the first distance is sequentially the first gradient, the second gradient,..., and the Nth gradient from low to high by adjusting the tow balancing machine, and the first detection sample, the second detection sample,..., and the Nth detection sample are sequentially obtained.

[0013] As a specific embodiment, in the gradient dividing step, the distance between the highest surface of the tow in the tow package and the ground is equally divided into at least 5 gradients.

[0014] As a specific embodiment, in the sample selection step, the ratio of the preset value to the initial amount of the tows in the tow package is 1 / total number of gradients.

[0015] As a specific embodiment, in the sample selection step, after the tow balancing machine moves the tows to each gradient, it stabilizes for 1 minute before sampling the detection sample.

[0016] Another embodiment of the present application also discloses a method for adjusting the position of tows, which is used in the opening process of tows, and uses an opener to open the tows, and the position of the tows is determined according to the above method.

[0017] When the tow balancing machine is at the lowest position, the second distance between the highest surface of the tows in the tow package and the ground is compared with the height value of the determined tow position in the previous step. If the second distance is greater than the height value of the determined tow position, the height of the swing arm of the opener is adjusted and / or the ground reference at the bottom end of the tow balancing machine is lowered, so that the tows in the tow package are located at the determined tow position.

[0018] By using the above technical solution, after the height value of the determined tow position is determined, when the tow balancing machine is at the lowest position, if the second distance between the highest surface of the tows in the tow package and the ground is greater than the height value of the determined tow position, the tows in the tow package cannot be simply located at the determined tow position during the opening process by adjusting the height of the balancing machine. At this time, by increasing the height of the swing arm of the opener and / or lowering the ground reference at the bottom end of the balancing machine, it is ensured that all tows in the tow package can be located at the determined tow position, and by setting the photoelectric switch at the determined tow position, it is ensured that the tows in the entire tow package can be at the optimal balancing height of the tows during the opening process, so as to stabilize the tension of the tow extraction and reduce the filter rod suction resistance mark deviation. The method for adjusting the position of the tows is not affected by other parameters, does not need to be adjusted in linkage, the adjustment process is simple, the cost is low, and after adjustment, it can be continuously used without changing the brand and specifications of the tows, frequent adjustment is not needed, a new reference scheme is provided for the ground reference of the tow balancing machine and the optimization of the equipment manufacturing of a newly built plant.

[0019] Further, the height of the swing arm of the opener is increased, and the increased height of the swing arm is the difference between the height value of the determined tow position and the second distance.

[0020] Further, the ground reference at the bottom end of the tow balancing machine is lowered, and the lowered height of the ground reference is the difference between the height value of the determined tow position and the second distance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural schematic diagram of a tow opening device related to the prior art is shown;

[0022] Figure 2A method of adjusting the position of a tow according to an embodiment of the present application;

[0023] Figure 3 Another method of adjusting the position of a tow according to an embodiment of the present application;

[0024] In the figure, 100 - opener, 110 - swing arm, 200 - tow package, 300 - tow balancer. DETAILED DESCRIPTION

[0025] The specific embodiments of the present application will be described hereinafter with reference to the drawings, but the advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure made herein. Although the description of the present application will be introduced in connection with preferred embodiments, it is not intended to represent that the present application is limited to such embodiments. On the contrary, the description of the present application is intended to cover all possible embodiments and modifications that can be made within the scope of the present application, based on the written disclosure and the concepts of the present application. In order to provide a thorough understanding of the present application, numerous specific details are described in the following description. The present application can be practiced without these specific details. In addition, well-known or conventional details are not described in order to avoid obscuring the present application. Furthermore, in order to avoid cluttering the present application with unnecessary detail, some aspects of the embodiments may, but do not necessarily, have to be described with a certain degree of abstraction.

[0026] It should be noted that in this specification, like numbers and letters indicate like items throughout the drawings, and some items may be shown not to scale. In cases where the term "proximate" or "proximity" is used, it is intended to mean that the items are in close enough proximity to one another to be considered as being in contact with one another.

[0027] In the description of the present embodiments, it should be noted that the terms "upper", "lower", and the like, indicate relative positions or orientation relationships based on the positions or orientation relationships shown in the drawings, or the positions or orientation relationships in which the products of the present application are usually placed, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0029] An embodiment of the present application discloses a method for determining the position of a tow, wherein a tow package containing a tow is placed on a tow balancer, and the method comprises the following steps:

[0030] Adjusting step: adjusting the tow balancer to the lowest position;

[0031] Gradient division step: measure the distance between the highest surface of the tow in the tow package and the ground, and divide the distance into multiple gradients, record the gradient values, and the gradient values from low to high are recorded as the first gradient, the second gradient, …, and the Nth gradient;

[0032] Sample selection step: when the remaining amount of the tow in the tow package reaches a preset value, adjust the tow balancing machine so that the first distance from the highest surface of the tow in the tow package to the ground is the first gradient, the second gradient, …, and the Nth gradient. When the first distance is the first gradient, select the produced filter rod as the first detection sample. When the first distance is the second gradient, select the produced filter rod as the second detection sample. When the first distance is the Nth gradient, select the produced filter rod as the Nth detection sample.

[0033] Step of determining the position of the tow: measure the draw resistance index of the first detection sample to the Nth detection sample; compare the draw resistance indexes of the first detection sample to the Nth detection sample to determine the detection sample with the lowest draw resistance index, and take the gradient value corresponding to the detection sample with the lowest draw resistance index as the height value of the position of the tow.

[0034] By using the above technical solution, the balancing machine is lowered to the lowest position, the distance between the highest surface of the tow in the tow package and the ground is divided into multiple gradients from low to high. When the remaining amount of the tow in the tow package reaches a preset value, the filter rods produced when the tow is located at each gradient are sampled. By comparing the draw resistance indexes of the filter rods produced when the tow is located at each gradient, the gradient with the smallest draw resistance index is found as the height value of the position of the tow. The position of the tow is the optimal balancing position during processing of the tow, that is, when the tow is located at the position, the draw resistance index of the produced filter rod is the smallest. The method can more accurately find the optimal balancing position of the tow package, and can maintain the tow at the position during opening process, thereby reducing the draw resistance index of the filter rod and improving the stability of smoke indicators.

[0035] As a specific embodiment, in the gradient division step, the distance between the highest surface of the tow package and the ground is divided into at least 5 gradients. The specific number of gradient division is not limited, and the more the number of gradients is set, the closer the measured position is to the actual optimal balancing position.

[0036] Further, in the sample selection step, the ratio of the preset value to the initial amount of the tow in the tow package is 1 / total number of gradients. For example, when 5 gradients are set, sampling is performed when the remaining amount of the tow in the tow package is about 1 / 5, so as to achieve the purpose of raising or lowering the height of the tow balancing machine to enable the tow to be at all height gradients required by the test. In the sampling, the embodiment of the present application does not limit the order of the gradients of the tow test, i.e., the first distance from the highest surface of the tow to the ground does not necessarily move from the first gradient to the Nth gradient, and the order can be disturbed. Of course, the optimal way in the test is that the tow is sequentially located at the first gradient to the Nth gradient from low to high for sampling.

[0037] As a specific embodiment, in the sample selection step, after the tow balancing machine moves the tow to each gradient, the sampling of the test sample is performed after 1 minute of stabilization. When the tow is just lifted to a new gradient, it is not appropriate to sample immediately, and the device needs to be stabilized, so that the sample taken can represent the state of the tow at the new gradient. Specifically, after sampling at a gradient is completed, the tow is immediately moved to the next gradient to avoid the influence of the raw material of the tow on the test time.

[0038] Specifically, the frequency of sampling and the number of tests affect the accuracy of the test results. A specific sampling method is that 6 sets of mean value tests are performed on each gradient sample, i.e., 6 sets are taken for each of the first test sample to the Nth test sample, and each set has 30 samples, so the number of filter rods sampled for each gradient is not less than 180. Alternatively, 10 sets of mean value tests can be performed on each gradient, i.e., 10 sets are taken for each of the first test sample to the Nth test sample, and the number of filter rods sampled for each gradient is not less than 300. The number of samples and the frequency can be adjusted according to actual conditions. Further, after multiple sets of sampling are performed, the draw resistance marker bias of each of the first test sample to the Nth test sample is measured, and the mean value of the draw resistance marker bias of the multiple sets of the first test sample to the Nth test sample is calculated. The draw resistance marker bias of the first test sample to the Nth test sample is compared by taking the mean value, and the test sample with the lowest draw resistance marker bias mean value is obtained, and then the gradient value corresponding to the test sample with the lowest draw resistance marker bias mean value is determined, i.e., the height value of the position of the tow. Specifically, when the first test sample to the Nth test sample is detected, the comprehensive test table is calibrated, each test sample is directly placed into the comprehensive test table to measure the draw resistance marker bias, and then the mean value of the draw resistance marker bias of each set of each sample is obtained.

[0039] Specifically, in the entire sampling process, the same tow package is used for the test, the equipment does not stop, and the equipment parameters do not change, so as to avoid the influence of the instability of the equipment when it is started and stopped and the change of the parameters on the draw resistance stability of the filter rod.

[0040] Another embodiment of the present application also discloses a method for adjusting the position of a tow, in particular, the method is used in the opening process of the tow, and an opener is used to open the tow. The position of the tow is determined according to the above method; and the position of the tow package 200 is adjusted, and there are two cases:

[0041] If the second distance (denoted as H2) between the highest surface of the tow in the tow package 200 and the ground is less than the height value (denoted as H1) of the determined position of the tow when the tow balancing machine 300 is located at the lowest position, the height of the tow balancing machine 300 is directly adjusted, the distance between the highest surface of the tow package 200 and the ground is H1, and the photoelectric switch of the tow balancing machine 300 is adjusted to the position of H1. In the subsequent opening process, the position of the tow is detected by the photoelectric switch and fed back to the tow balancing machine 300, and the position of the tow package 200 is adjusted by the tow balancing machine 300, so that the tow in the tow package 200 is located at H1 during opening.

[0042] If the second distance H2 between the highest surface of the tow in the tow package 200 and the ground is greater than the height value H1 of the determined position of the tow when the tow balancing machine 300 is located at the lowest position, the height of the tow balancing machine 300 cannot be further reduced, and the height of the swing arm 110 of the opener 100 and / or the ground reference at the bottom end of the tow balancing machine 300 is adjusted, so that the tow in the tow package is located at the confirmed position of the tow.

[0043] Specifically, one embodiment is shown in Figure 2 by increasing the height of the swing arm 110 of the opener 100, the distance between the tow in the tow package 200 and the swing arm 110 of the opener 100 is increased, and is equal to the distance between the tow at H1 and the swing arm 110 of the opener 100. Specifically, the height of the swing arm 110 is increased by the difference between H2 and H1.

[0044] Another embodiment is shown in Figure 3 by constructing the ground at the bottom end of the tow balancing machine 300, the ground reference at the bottom end of the tow balancing machine 300 is lowered, the tow balancing machine 300 is placed in the lowered ground, and the highest surface position of the tow package 200 is lowered at the beginning, so that the distance between the tow and the ground is H1. The ground is lowered by the difference between H2 and H1. Specifically, as shown in Figure 3 the distance between the upper surface of the tow package 200 and the ground is set to H1, and the ground reference height h to be lowered is H2-H1, so that the tow in the new tow package 200 can be completely at the optimal height H1. In specific implementation, the distance h of the lowered ground can be increased by about 100 mm.

[0045] After the optimal tow balance height H1 is determined, the photoelectric switch position of the tow balance machine 300 is adjusted so that the photoelectric switch is at the height value H1 of the determined tow position, to ensure that when the tow in the tow pack 200 is opened, all the tow planes are always at H1, i.e., at the optimal balance height of the tow opening, so that the produced filter rod has the minimum draw resistance index deviation.

[0046] With the above technical solution, when the distance H2 between the highest plane of the tow in the tow pack 200 and the ground is greater than the height value H1 of the determined tow position, the tow pack 200 cannot be simply positioned at the optimal balance position by adjusting the height of the tow balance machine 300, the inventor increases the height of the swing arm 110 of the opening machine 100 and / or lowers the ground reference of the lower end of the tow balance machine 300 to make the tow in the tow pack 200 be at the optimal balance height of the tow opening during the processing, stabilize the tension of the tow extraction, and reduce the draw resistance index deviation of the filter rod. The tow pack position adjustment method of this embodiment is not affected by other parameters, does not need to be adjusted in linkage, the adjustment process is simple, the cost is low, and after the adjustment, the method can be continuously used without changing the tow brand and specification, and frequent adjustment is not needed.

[0047] According to the method for determining the tow position disclosed in the embodiments of the present application, a test is performed on an opening device:

[0048] The test results are shown in Table 1 below:

[0049]

[0050]

[0051] As described above, the height value H1 of the tow position of the test machine (i.e., the height of the optimal balance position of the tow) is determined to be 1070 mm by using the method of the embodiments of the present application.

[0052] During the test, the distance between the highest plane of the tow in the tow pack and the ground (including the height of the balance machine) is 1250 mm, and when the photoelectric switch is adjusted to about 1070 mm, about 180 mm of the tow is not at the optimal height position. Therefore, when the position of the tow pack 200 is adjusted, the ground base can be dug to make the tow balance machine 300 move downward by 180 mm, so that the tow in the new tow pack 200 can be at 1070 mm during the tow opening process.

[0053] After the test machine is adjusted as described above, actual operation is performed, and ordinary filter rods with a size of 23.9 mm*100 mm*3000 Pa are taken as test objects for testing. After the tow is adjusted to the determined tow position, the draw resistance index deviation of the produced filter rod is compared with that of the filter rod produced at the original highest position, and the data is shown in Table 2 below:

[0054] Table 2: Comparison table of the filter rod produced by the tow at the highest position and the filter rod produced by the tow at the position of the present application

[0055]

[0056]

[0057]

[0058]

[0059] According to the data of the above running process, the average draw resistance deviation of the filter rod produced by adjusting the tow position according to the embodiment of the present application can be reduced by about 7 Pa compared with the average draw resistance deviation of the filter rod produced by the original highest position.

[0060] In summary, according to the embodiment of the present application, the average draw resistance deviation of the filter rod at different height gradients is calculated to determine the optimal balance height of the tow, and when the optimal balance height of the tow exceeds the adjustment range of the balance machine, the ground of the balance machine placing station can be constructed or the support swing arm height of the filter rod opening machine can be increased to achieve adjustment, so that the tow of the entire tow package can be opened at the optimal balance position. The adjustment method adopted in the embodiment does not need to adjust the parameters of other opening positions, only excavates the foundation to adjust the height of the balance machine or increases the swing arm height to achieve the purpose of overall balance of the tow. The adjustment method involves few parameters, the scheme is simple, and the operability is strong. In the case of unchanged tow package, the adjustment method does not need to be adjusted frequently, provides a new reference scheme for the ground reference of the balance machine of the newly built plant and the optimized manufacturing of equipment.

[0061] If a different tow package is produced, it is relatively simple and easy to determine the position of the new tow package and adjust the position of the tow package through the swing arm or the foundation. At the same time, it has been proved in practice that the method of the embodiment of the present application has very good effect on reducing the draw resistance deviation of the filter rod.

[0062] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the foregoing is a further detailed description of the present application in connection with specific embodiments thereof, and is not intended to limit the specific embodiments of the present application. Those skilled in the art can make various changes in form and details without departing from the spirit and scope of the present application, including making a number of simple deductions or substitutions.

Claims

1. A method of determining the position of a tow for a tow package containing a tow placed on a tow balancing machine, characterized in that, The method comprises the following steps: an adjusting step of adjusting the tow balance machine to the lowest position; a gradient dividing step of measuring the distance between the highest surface of the tow in the tow package and the ground and dividing the distance into a plurality of gradients, N, and recording the gradient values, which are sequentially recorded as the first gradient, the second gradient,..., and the Nth gradient from low to high; a sample selecting step of adjusting the tow balance machine when the remaining amount of the tow in the tow package reaches a preset value, so that the first distance between the highest surface of the tow in the tow package and the ground is the first gradient, the second gradient,..., and the Nth gradient, respectively, selecting the produced filter rod as the first detection sample when the first distance is the first gradient, selecting the produced filter rod as the second detection sample when the first distance is the second gradient, and selecting the produced filter rod as the Nth detection sample when the first distance is the Nth gradient, wherein the ratio of the preset value to the initial amount of the tow in the tow package is 1 / total number of gradients; a position determining step of measuring the draw resistance index of the first detection sample to the Nth detection sample, comparing the draw resistance indexes of the first detection sample to the Nth detection sample, determining the detection sample with the lowest draw resistance index, and taking the gradient value corresponding to the detection sample with the lowest draw resistance index as the height value of the position of the tow.

2. The method of claim 1, wherein, In the sample selecting step, the first distance is sequentially adjusted to be the first gradient, the second gradient,..., and the Nth gradient from low to high, and the first detection sample, the second detection sample,..., and the Nth detection sample are sequentially obtained.

3. The method of claim 1, wherein, In the gradient dividing step, the distance between the highest surface of the tow in the tow package and the ground is equally divided into at least 5 gradients.

4. The method of claim 1, wherein, In the sample selecting step, the tow balance machine moves the tow to each gradient, and then stabilizes for 1 minute before sampling the detection sample.

5. A method for adjusting the position of a fiber bundle, which is used in an opening process of a fiber bundle, and in which an opener is used to open the fiber bundle, characterized by ， The position of the tow is determined according to the method of any one of claims 1-4; When the tow balance machine is at the lowest position, the second distance between the highest surface of the tow in the tow package and the ground is compared with the height value of the position of the tow confirmed in the previous step. If the second distance is greater than the height value of the position of the tow, the height of the swing arm of the opening machine is adjusted and / or the ground reference at the bottom end of the tow balance machine is lowered, so that the tow in the tow package is located at the confirmed position of the tow.

6. The method of claim 5, wherein the step of adjusting the position of the tow comprises the step of: The height of the swing arm of the opening machine is increased, and the increased height of the swing arm is the difference between the height value of the confirmed position of the tow and the second distance.

7. The method of claim 5, wherein the step of adjusting the position of the tow comprises the step of: The ground reference at the bottom end of the tow balance machine is lowered, and the lowered height of the ground reference is the difference between the second distance and the height value of the confirmed position of the tow. The ground reference at the bottom end of the tow balance machine is lowered, and the lowered height of the ground reference is the difference between the second distance and the height value of the confirmed position of the tow. ​

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