Method and device for determining groove depth of a smoothing disc on a cigarette making machine

Abstract

The application discloses a method and device for determining groove depth of a leveling disc on a cigarette making machine. The method comprises: calculating the movable stroke of the leveling disc; obtaining the relationship between the position of the leveling disc and the average density of the cigarette under the condition of the preset filling value of the tobacco, and the preset length and diameter of the cigarette, by using the leveling disc without groove under the starting state of the cigarette making machine; determining the density of the two dense ends and the flat section between the two dense ends of the preset cigarette according to the target weight of the preset cigarette, the increment and length of the two dense ends; determining the position of the leveling disc corresponding to the density of the two dense ends and the flat section, and taking the difference between the position of the leveling disc corresponding to the two dense ends and the position of the leveling disc corresponding to the flat section as the groove depth of the two dense ends. The application can quickly calculate the groove depth of the applicable leveling disc according to the tobacco filling value and the filling amount information of the cigarette in the product research and development design stage, and greatly improves the product research and development efficiency and reduces the research and development cost.

Description

Technical Field

[0001] This application relates to the field of cigarette technology, and more specifically, to a method and apparatus for determining the groove depth of a flat disc on a cigarette rolling machine. Background Technology

[0002] The increase in the density of the cigarette's ends is a significant factor affecting its physicochemical properties and sensory quality. Its magnitude depends on the tobacco filling properties, the amount of tobacco packed into the cigarette, and the dimensions of the grooves on the flattening disc of the cigarette rolling machine. The flattening disc is a disc-shaped accessory that reduces excess tobacco and evenly feeds it into the cigarette rolling machine. The cigarette rolling machine has two flattening discs placed adjacent to each other on the same plane. The edges of the flattening discs have grooves. During rotation, corresponding grooves on the two flattening discs simultaneously reach their closest positions. These two opposing grooves can accommodate more tobacco, which will serve as the dense ends of the cigarette (i.e., the beginning or end section). The increased amount of tobacco allows for a more compact filling at both dense ends of the cigarette.

[0003] After the raw materials and auxiliary materials for cigarette products are designed, in the traditional model, various flat discs (with different groove sizes) need to be manufactured through trial and error according to the specific specifications of the designed cigarettes. Experiments are then conducted to achieve a close-end increment that matches the tobacco and filling amount. In each new product development process, it is costly to manufacture flat discs with various types of grooves and to determine the matching of the close-end increment through numerous experiments, consuming significant manpower and resources. Furthermore, during the switching of flat discs in the experimental stage, differences in cigarette machine operating conditions are inevitable, making it difficult to ensure that the flat disc groove is a single-factor condition, resulting in poor reproducibility. In practice, multiple experiments are required to determine the final size, making it impossible to accurately and efficiently complete the flat disc groove design in the product design and development process.

[0004] The leveling disc is crucial to cigarette quality. Tobacco manufacturers have conducted extensive research on leveling disc design, focusing primarily on the following two areas:

[0005] The first category involves the optimized design of the leveling disc and its control mechanism. For example, patent CN201620125575.0 discloses a leveling disc structure for the PROTOS2-2 ultra-high-speed cigarette making machine. This structure features three deep grooves and three shallow grooves evenly distributed on the disc body, increasing the tobacco density at the cigarette tip and reducing the occurrence of empty cigarette ends during high-speed production. Patent CN202211482495.7 discloses a leveling disc spacing adjustment mechanism that allows adjustment of the distance between two leveling discs, thereby adjusting the tobacco tightness at the cigarette tip, facilitating quick adjustment of the leveling disc spacing by operators. Patent CN202211120780.4 discloses a universal leveling disc for PT series cigarette making machines, which can reduce the proportion of cigarettes with bamboo joints and empty ends. This category mainly focuses on the optimized design of the leveling disc and its control mechanism, without addressing the design of the groove depth on the leveling disc.

[0006] The second category is the matching method for the leveling groove specifications of the cigarette machine leveling plate. For example, patents CN201811232389.7 and CN201811231442.1 disclose a method for quickly matching the leveling groove specifications of the leveling plate of a cigarette machine for slim cigarettes. This method measures the average density of the ends of multiple cigarette samples and the average density of the non-compacted sections based on the cigarette density, and then calculates the density distribution characteristic value to obtain the matching degree. However, this method has the following drawbacks: First, this method is an evaluation method. It uses a known leveling plate to conduct experimental production of cigarettes, and then evaluates the matching degree by testing sampled cigarettes and using a certain algorithm to determine the direction of leveling groove depth adjustment. It cannot directly obtain the specific leveling groove depth dimension. Second, this method has a narrow scope of application. It only considers the single dimension of cigarette density and does not take into account the two important factors of tobacco filling quality and filling amount difference, so it cannot accurately obtain the specific size of the required leveling groove. Summary of the Invention

[0007] This application provides a method and apparatus for determining the groove depth of a flattening disc on a cigarette making machine. During the product development and design stage, the appropriate groove depth of the flattening disc can be quickly calculated based on the tobacco filling value and the filling amount of the cigarette, thereby quickly determining the specifications of the flattening disc, which greatly improves product development efficiency and reduces development costs.

[0008] This application provides a method for determining the groove depth of a flat disc on a cigarette rolling machine, including:

[0009] Calculate the movable stroke of the leveling plate;

[0010] When the cigarette machine is running, the relationship between the position of the flat plate and the average density of the cigarette is obtained by using a flat plate without grooves to obtain the preset filling value of tobacco and the preset length and diameter of the cigarette.

[0011] The density of the two dense ends and the flat section between the two dense ends of the preset cigarette are determined based on the target weight of the preset cigarette, the increment of the two dense ends, and the length.

[0012] Based on the relationship between the position of the flat plate and the average density of the cigarette, the position of the flat plate corresponding to the density of the two dense ends and the flat section is determined, and the difference between the position of the flat plate corresponding to the two dense ends and the position of the flat plate corresponding to the flat section is taken as the groove depth of the two dense ends.

[0013] Preferably, before obtaining the relationship between the position of the flat plate and the average density of the cigarettes, the weight control system of the cigarette rolling machine is calibrated.

[0014] Preferably, calculating the movable stroke of the leveling disc specifically includes:

[0015] With the cigarette machine stopped, manually move the leveling disc to its upper limit position and measure the first distance between the leveling disc and the suction guide rail.

[0016] Manually move the leveling disc to the lower limit position and measure the second distance between the leveling disc and the wire suction guide;

[0017] The difference between the first distance and the second distance is used as the movable stroke of the leveling plate.

[0018] Preferably, the weight control system for calibrating the cigarette machine specifically includes:

[0019] Under the "target weight sampling" setting mode of the cigarette machine, a preset number of cigarettes without nozzles are extracted from the front and rear rails of the cigarette machine, and the target weight value displayed by the weight control system is recorded.

[0020] Use a balance to weigh the preset number of cigarettes without nozzles extracted from the front and rear rails, and calculate the average weight.

[0021] If the absolute value of the difference between the average weight and the target weight is less than the first set value, then the weight center value calibration is complete.

[0022] Preferably, the weight control system for calibrating the cigarette machine further includes:

[0023] Under the "random weight sampling" setting mode of the cigarette machine, a preset number of cigarettes without nozzles are extracted from the front and rear rails of the cigarette machine, and the theoretical offset values ​​of the cigarettes without nozzles on the front and rear rails displayed by the weight control system are recorded.

[0024] Use a balance to weigh each cigarette without a mouthpiece extracted from the front and rear rails, and calculate the actual offset values ​​of the cigarettes without mouthpieces on the front and rear rails respectively.

[0025] If the absolute value of the difference between the theoretical and actual deviation values ​​of the front and rear rails is less than the second set value, then the random weight calibration is complete.

[0026] This application also provides a device for determining the groove depth of a flat disc on a cigarette machine, including a stroke calculation module, a relationship acquisition module, a density determination module, and a depth calculation module;

[0027] The stroke calculation module is used to calculate the movable stroke of the leveling plate;

[0028] The relationship acquisition module is used to obtain the relationship between the position of the flat plate and the average density of the cigarettes when the cigarette machine is in the start state, using a flat plate without grooves. This is done with a preset filling value of tobacco and a preset length and diameter of cigarettes.

[0029] The density determination module is used to determine the density of the two dense ends and the flat section between the two dense ends of the preset cigarette based on the target weight of the preset cigarette, the increment of the two dense ends, and the length.

[0030] The depth calculation module is used to determine the position of the flat plate corresponding to the density of the two dense ends and the flat section based on the relationship between the position of the flat plate and the average density of the cigarette. The difference between the position of the flat plate corresponding to the two dense ends and the position of the flat plate corresponding to the flat section is used as the groove depth of the two dense ends.

[0031] Preferably, the device for determining the groove depth of the flat disc on the cigarette rolling machine further includes a calibration module.

[0032] Preferably, the travel calculation module includes a first distance measurement module, a second distance measurement module, and a difference calculation module;

[0033] The first distance measurement module is used to manually move the leveling plate to the upper limit position when the cigarette machine is stopped, and to measure the first distance between the leveling plate and the suction guide rail.

[0034] The second distance measurement module is used to manually move the leveling disc to the lower limit position and measure the second distance between the leveling disc and the wire suction guide.

[0035] The difference calculation module is used to use the difference between the first distance and the second distance as the movable stroke of the leveling disk.

[0036] Preferably, the calibration module includes a target weight recording module, an average weight calculation module, and a first judgment module;

[0037] The target weight recording module is used to extract a preset number of cigarettes without nozzles from the front and rear rails of the cigarette machine under the "target weight sampling" setting mode, and record the target weight value displayed by the weight control system.

[0038] The average weight calculation module is used to weigh a preset number of cigarettes without nozzles extracted from the front and rear rails using a balance, and calculate the average weight.

[0039] The first judgment module is used to determine that the weight center value calibration is complete when the absolute value of the difference between the average weight and the target weight is less than a first set value.

[0040] Preferably, the calibration module further includes a theoretical calibration recording module, an actual calibration calculation module, and a second judgment module;

[0041] The theoretical calibration recording module is used to extract a preset number of cigarettes without nozzles from the front and rear rails of the cigarette machine under the "random weight sampling" setting mode, and record the theoretical calibration values ​​of the cigarettes without nozzles on the front and rear rails displayed by the weight control system.

[0042] The actual calibration calculation module is used to weigh each cigarette without a mouthpiece extracted from the front and rear rails using a balance, and to calculate the actual calibration value of the cigarette without a mouthpiece from the front and rear rails respectively.

[0043] The second judgment module is used to determine that the weight random calibration is complete when the absolute value of the difference between the theoretical and actual calibration values ​​of the front and rear rails is less than the second set value.

[0044] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0046] Figure 1 A flowchart illustrating the method for determining the groove depth of the flat disc on the cigarette machine provided in this application;

[0047] Figure 2 A schematic diagram showing the correspondence between the position of the flat plate for each gradient and the average density of the cigarettes in one example provided in this application;

[0048] Figure 3 A schematic diagram illustrating the relationship between the position of the flat plate and the average density of the cigarettes in one example provided in this application;

[0049] Figure 4 A schematic diagram of the device for determining the groove depth of the flat disc on the cigarette machine provided in this application. Detailed Implementation

[0050] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0051] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0052] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0053] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0054] This application provides a method and apparatus for determining the groove depth of a flattening disc on a cigarette making machine. During the product development and design stage, the appropriate groove depth of the flattening disc can be quickly calculated based on the tobacco filling value and the filling amount of the cigarette, thereby quickly determining the specifications of the flattening disc, which greatly improves product development efficiency and reduces development costs.

[0055] like Figure 1 As shown, the method for determining the groove depth of the flat disc on the cigarette machine provided in this application includes:

[0056] S110: Calculate the movable stroke of the leveling plate.

[0057] As one example, calculating the movable stroke of the leveling disk specifically includes:

[0058] S1101: With the cigarette machine stopped, manually move the leveling disc to the upper limit position and measure the first distance between the leveling disc and the suction guide rail.

[0059] S1102: Manually move the leveling disc to the lower limit position and measure the second distance between the leveling disc and the wire suction guide.

[0060] S1103: The difference between the first distance and the second distance is used as the movable stroke of the leveling plate.

[0061] In this example, the voltage (V) of the suction ribbon at the flattening disc position on the cigarette rolling machine is calibrated. As an example, the upper limit position is -7V, and the lower limit position is 7V. In this example, the first distance is denoted as L. a (mm), the second distance is denoted as L b (mm), thus obtaining the movable stroke L of the flat disc. a -Lb It can also determine the conversion relationship between the volts and millimeters of the absorbent ribbon (L). a -L b ) / 14(mm / V).

[0062] S120: When the cigarette making machine is running, the relationship between the position of the flat disc and the average density of the cigarette is obtained by using a flat disc without grooves to obtain a preset filling value of tobacco and a preset length and diameter of cigarette.

[0063] As an example, by blending a certain brand of tobacco leaves with a corresponding proportion of expanded tobacco leaves, a tobacco leaf with a preset filling value can be obtained. For instance, using a certain brand of tobacco leaves, a filling value tester (under 2kg testing conditions) yields a filling value of 5.0cm. 3 / g, by blending 7.0%, 13.0%, and 18.0% expanded tobacco shreds, 5.2cm was obtained. 3 / g, 5.4cm 3 / g, 5.6cm 3 / g Three different types of finished tobacco with different filling properties.

[0064] As an example, when the cigarette rolling machine is running, using a flat disc without grooves, the relationship between the position of the flat disc and the average density of the cigarettes, given a preset filling value of tobacco and a preset length and diameter of cigarettes, specifically includes:

[0065] S1201: Turn off the weight control system of the cigarette machine (used to adjust the position of the flat plate according to the target weight). After starting the cigarette machine, fix the position of the flat plate without grooves at the upper limit position, feed the cigarette machine with the preset filling value of tobacco, obtain the first weight value detected by the weight control system, and use the first weight value as the average weight value of the flat plate at the upper limit position.

[0066] Specifically, first, set the negative pressure of the air chamber to a suitable parameter value for this type of cigarette machine, and set the needle roller feed rate coefficient to ensure that the return rate is between 30-40%. Set the starting position of the leveling disc to the upper limit position (if the relative position of the leveling disc is adjusted by the position of the suction ribbon, then the starting position of the leveling disc is the lower limit position), and then turn off the weight control system of the cigarette machine, so that the position of the leveling disc (or suction ribbon) after the cigarette machine starts is fixed at the limit position.

[0067] S1202: Turn on the weight control system and gradually increase the target weight of the cigarettes, so that the flat plate moves towards the lower limit position of the flat plate in a gradient of preset distance intervals, and record the average weight value corresponding to each gradient until the flat plate moves to the lower limit position.

[0068] After turning on the cigarette machine weight control system, the leveling plate position or target weight (corresponding to the leveling plate position) is used as the gradient. Under each gradient, when the leveling plate position is within the preset difference range (e.g., ±1.5V) of the center value of the gradient, the weight continues to increase to the next gradient, and the target weight of the cigarette machine is increased in sequence until the leveling plate reaches the lower limit position (or the suction ribbon reaches the upper limit position).

[0069] S1203: Calculate the volume of the preset cigarette based on the preset length and diameter, and calculate the average density of the gradient based on the average weight of each gradient.

[0070] S1204: Fit the relationship between the position of the flat plate and the average density of the cigarette based on the flat plate position and average density corresponding to each gradient.

[0071] As an example, based on the transformation relationship obtained in S110, the position of the flat disk in volts is converted into the distance between the flat disk and the upper limit position (in mm). This yields the correspondence between the distance of each gradient and the average density, and these discrete data pairs are then fitted to obtain the relationship formula or curve between them.

[0072] With a fill value of 5.6cm 3 Taking / g of tobacco as an example. As a case study, obtaining the relationship between the position of the flattened disc and the average density of the cigarettes involves the following steps:

[0073] Feed 5.6cm into the cigarette rolling machine 3 With / g of tobacco, set the negative pressure of the air chamber to 100mbar, adjust the needle roller feed coefficient to make the return amount within [35, 40]%, set the flattening disc start position to -7V, turn off the cigarette machine weight control system, and fix the flattening disc position at the upper limit position -7V after the cigarette machine starts.

[0074] Start the cigarette rolling machine. With the machine running stably and the leveling disc continuously at its upper limit position (-7V), the weight control system detects a weight value of 547mg. Set the target weight for the upper limit position to 547mg (as the average weight at that position). Then, turn on the weight control system again. Divide the 14V travel range into 7 gradients with a 2V interval between the leveling disc positions. Increase the target weight sequentially until the leveling disc position fluctuates within ±1.5V of the gradient's center value. Continue increasing the target weight of the cigarette rolling machine until the leveling disc reaches the lower limit position (7V). In the above steps, collect the average weight value M and the leveling disc position value P for each gradient. Based on the conversion relationship 0.32mm / V, convert the leveling disc position into the distance between the leveling disc and the upper limit position.

[0075] Based on the cigarette specifications (54mm in length and 3.85mm in diameter without a filter), the cigarette volume V = 3.14 × 3.85² × 54 × 10⁻⁶. -3 (cm 3 ) = 2.51 (cm) 3 This allows for the calculation of the average cigarette density D corresponding to each gradient within the travel range of the flat plate. avg The data is shown in Table 1 below: (See diagram below) Figure 2 ):

[0076]

[0077] Finally, based on Table 1 or... Figure 2 By performing linear fitting, the relationship between the position of the flat plate and the average density of the cigarettes is obtained, as follows: Figure 3 As shown.

[0078] S130: Determine the density of the two dense ends and the flat section between the two dense ends of the preset cigarette based on the target weight of the preset cigarette, the increment of the two dense ends and the length.

[0079] Assuming the tobacco filling value in the cigarette product design is the aforementioned tobacco filling value F. n The weight of the filterless cigarette (i.e., the target weight) is M. 无 The cigarette has a length of L0 and a diameter of C. The increment and length of the closed end of the lit section are Z1 and L1, respectively, and the increment and length of the closed end of the mouthpiece are Z2 and L2, respectively. Then, the length of the flat section L3 = L0 - L1 - L2. Therefore, the weight per millimeter of the flat section is...

[0080] Based on the length, increment, and weight per millimeter of each segment of the cigarette, the weights of the ignition segment, flat segment, and filter tip segment are (1+Z1)×L1×S (mg), L3×S (mg), and (1+Z2)×L2×S (mg), respectively. Therefore, the densities D1 of the ignition segment, D3 of the flat segment, and D2 of the filter tip segment are respectively...

[0081] S140: Determine the position of the flattened disc (i.e., the distance between the flattened disc and the upper limit position) K corresponding to the density of the two dense ends and the flat section based on the relationship between the position of the flattened disc and the average density of the cigarette. a K b K C And respectively, the difference K between the position of the flat plate corresponding to the two close ends and the position of the flat plate corresponding to the flat section is calculated. a -K b K c -K b The groove depth at the two close ends.

[0082] As an example, when designing a cigarette product, a fill value of 5.6cm might be used. 3 The tobacco shreds are 605mg in weight and 54mm in length without a mouthpiece. If the requirements are 8% increase in the density of the burning section, 11mm in length of the burning section, 6% increase in the density of the mouthpiece, and 10mm in length of the mouthpiece, then the following conditions apply.

[0083] The weight per millimeter of the flat section is calculated based on the increment and length of each segment. The weights of the ignition section, flat section, and mouthpiece section were then calculated to be 129.55 mg, 359.86 mg, and 115.59 mg, respectively. Based on the cigarette diameter and the lengths of the three sections, the corresponding volumes were calculated to be 0.51 cm³. 3 1.54cm 3 0.47cm 3 Therefore, the densities of the ignition section, the flat section, and the nozzle section were found to be 253.04 mg / cm³. 3 234.30 mg / cm 3 248.36 mg / cm 3 .

[0084] Based on the relationship obtained from S120, and according to the density of the ignition section, flat section, and nozzle section, the distances between the flat plate and the upper limit position corresponding to the ignition section, flat section, and nozzle section are determined to be 3.71mm, 1.53mm, and 3.16mm, respectively. Therefore, the groove depth of the ignition section should be 3.71-1.53=2.18mm, and the groove depth of the nozzle section should be 3.16mm-1.53mm=1.63mm.

[0085] Preferably, the weight control system of the cigarette rolling machine is calibrated before the relationship between the position of the flat plate and the average density of the cigarettes is obtained.

[0086] As one example, calibrating the weight control system of a cigarette rolling machine specifically includes:

[0087] P1: Under the "target weight sampling" setting mode of the cigarette machine, extract a preset number of cigarettes without nozzles from the front rail and the rear rail of the cigarette machine respectively, and record the target weight value displayed by the weight control system.

[0088] P2: Use a balance to weigh the preset number of cigarettes without nozzles extracted from the front and rear rails, and calculate the average weight;

[0089] P3: If the absolute value of the difference between the average weight and the target weight is less than the first set value, then the weight center value calibration is complete.

[0090] As an example, using the "target weight sampling" setting of the cigarette rolling machine, 100 cigarettes without nozzles were sampled from both the front and rear rails, and the target weight value W0 = 600mg displayed by the cigarette rolling machine's weight control system was recorded. The average weight of the 200 cigarettes from both the front and rear rails was then measured using a balance, resulting in W1 = 598mg. The value |W1 - W0| was calculated to be 2mg, thus satisfying the requirement of "|W1 - W0| ≤ 3mg," indicating that the weight center value calibration was complete.

[0091] Preferably, the weight control system for calibrating the cigarette machine further includes:

[0092] P4: Under the "random weight sampling" setting mode of the cigarette machine, extract a preset number of cigarettes without nozzles from the front rail and the rear rail of the cigarette machine, and record the theoretical offset values ​​of the cigarettes without nozzles on the front rail and the rear rail displayed by the weight control system.

[0093] P5: Use a balance to weigh each cigarette without a mouthpiece extracted from the front and rear rails, and calculate the actual offset values ​​of the cigarettes without mouthpieces on the front and rear rails respectively.

[0094] P6: If the absolute value of the difference between the theoretical and actual deviation values ​​of the front and rear rails is less than the second set value, then the weight random calibration is complete.

[0095] As an example, using the "random weight sampling" setting of the cigarette machine, 100 cigarettes without nozzles are sampled from both the front and rear rails. The weight deviation values ​​of the cigarettes without nozzles on the front and rear rails, as displayed by the cigarette machine's weight control system, are recorded as SD0 = 16.1 mg and SD1 = 15.8 mg. For the 100 cigarettes without nozzles taken from the front and rear rails of the cigarette machine, the weight of each cigarette without nozzles is first measured using a balance, and the deviation values ​​of the front and rear rails are calculated as SD2 = 16.3 mg and SD3 = 16.4 mg. Since the requirement of "|SD0-SD2|≤1mg and |SD1-SD3|≤1mg" is met, the random weight calibration is completed.

[0096] Based on the above-mentioned method for determining the groove depth of the leveling disc on a cigarette machine, this application also provides a device for determining the groove depth of the leveling disc on a cigarette machine. For example... Figure 4 As shown, the device for determining the groove depth of the flat disc on the cigarette rolling machine includes a stroke calculation module 410, a relationship acquisition module 420, a density determination module 430, and a depth calculation module 440.

[0097] The travel calculation module 410 is used to calculate the movable travel of the leveling plate.

[0098] The relationship acquisition module 420 is used to obtain the relationship between the position of the flat plate and the average density of the cigarette when the cigarette machine is in the start state, using a flat plate without grooves, with a preset filling value of tobacco and a preset length and diameter of cigarette.

[0099] The density determination module 430 is used to determine the density of the two dense ends and the flat section between the two dense ends of the preset cigarette based on the target weight of the preset cigarette, the increment of the two dense ends and the length.

[0100] The depth calculation module 440 is used to determine the position of the flat plate corresponding to the density of the two dense ends and the flat section based on the relationship between the position of the flat plate and the average density of the cigarette, and to take the difference between the position of the flat plate corresponding to the two dense ends and the position of the flat plate corresponding to the flat section as the groove depth of the two dense ends.

[0101] Preferably, the relationship acquisition module 420 includes a first weight acquisition module 4201, a second weight acquisition module 4202, a density calculation module 4203, and a fitting module 4204.

[0102] The first weight acquisition module 4201 is used to shut down the weight control system of the cigarette machine, and after starting the cigarette machine, fix the position of the leveling plate at the upper limit position, feed the cigarette machine with a preset filling value of tobacco, obtain the weight value detected by the weight control system, and use the weight value as the average weight value of the leveling plate at the upper limit position.

[0103] The second weight acquisition module 4202 is used to open the weight control system, gradually increase the target weight of the cigarette, so that the flat plate moves towards the lower limit position of the flat plate in a gradient of preset distance intervals, and records the average weight value corresponding to each gradient until the flat plate moves to the lower limit position.

[0104] The density calculation module 4203 is used to calculate the volume of the preset cigarette based on the length and diameter of the preset cigarette, and to calculate the average density of the gradient based on the average weight of each gradient.

[0105] The fitting module 4204 is used to fit the relationship between the position of the flat plate and the average density of the cigarette based on the flat plate position and average density corresponding to each gradient.

[0106] Preferably, the device for determining the groove depth of the flat plate on the cigarette rolling machine further includes a calibration module 450.

[0107] Preferably, the travel calculation module 410 includes a first distance measurement module 4101, a second distance measurement module 4102, and a difference calculation module 4103.

[0108] The first distance measurement module 4101 is used to manually move the leveling plate to the upper limit position when the cigarette machine is stopped, and to measure the first distance between the leveling plate and the suction guide rail.

[0109] The second distance measurement module 4102 is used to manually move the leveling plate to the lower limit position and measure the second distance between the leveling plate and the wire suction guide.

[0110] The difference calculation module 4103 is used to use the difference between the first distance and the second distance as the movable stroke of the leveling disk.

[0111] Preferably, the calibration module 450 includes a target weight recording module 4501, an average weight calculation module 4502, and a first judgment module 4503.

[0112] The target weight recording module 4501 is used to extract a preset number of cigarettes without nozzles from the front and rear rails of the cigarette machine in the "target weight sampling" setting mode, and record the target weight value displayed by the weight control system.

[0113] The average weight calculation module 4502 is used to weigh a preset number of cigarettes without nozzles extracted from the front and rear rails using a balance, and calculate the average weight.

[0114] The first judgment module 4503 is used to determine that the weight center value calibration is complete when the absolute value of the difference between the average weight and the target weight is less than a first set value.

[0115] Preferably, the calibration module 450 further includes a theoretical deviation recording module 4504, an actual deviation calculation module 4505, and a second judgment module 4506.

[0116] The theoretical calibration recording module 4504 is used to extract a preset number of cigarettes without nozzles from the front and rear rails of the cigarette machine under the "random weight sampling" setting mode, and record the theoretical calibration values ​​of the cigarettes without nozzles on the front and rear rails displayed by the weight control system.

[0117] The actual calibration calculation module 4505 is used to weigh each cigarette without a mouthpiece extracted from the front and rear rails using a balance, and to calculate the actual calibration value of the cigarette without a mouthpiece on the front and rear rails respectively.

[0118] The second judgment module 4506 is used to determine that the weight random calibration is completed when the absolute value of the difference between the theoretical and actual calibration values ​​of the front and rear rails is less than the second set value.

[0119] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A method for determining the groove depth of a flat disc on a cigarette rolling machine, characterized in that, include: Calculate the movable stroke of the leveling plate; When the cigarette machine is running, the relationship between the position of the flat plate and the average density of the cigarette is obtained by using a flat plate without grooves to obtain the preset filling value of tobacco and the preset length and diameter of the cigarette. The density of the two dense ends and the flat section between the two dense ends of the preset cigarette are determined based on the target weight of the preset cigarette, the increment of the two dense ends, and the length. Based on the relationship between the position of the flattening disc and the average density of the cigarette, the position of the flattening disc corresponding to the density of the two dense ends and the flat section is determined, and the difference between the position of the flattening disc corresponding to the two dense ends and the position of the flattening disc corresponding to the flat section is taken as the groove depth of the two dense ends.

2. The method for determining the groove depth of the flat disc on the cigarette rolling machine according to claim 1, characterized in that, Before obtaining the relationship between the position of the flat plate and the average density of the cigarettes, the weight control system of the cigarette rolling machine must also be calibrated.

3. The method for determining the groove depth of the flat disc on the cigarette rolling machine according to claim 1, characterized in that, Calculate the movable stroke of the leveling disc, specifically including: With the cigarette machine stopped, manually move the leveling disc to its upper limit position and measure the first distance between the leveling disc and the suction guide rail. Manually move the leveling disc to the lower limit position and measure the second distance between the leveling disc and the wire suction guide; The difference between the first distance and the second distance is used as the movable stroke of the leveling plate.

4. The method for determining the groove depth of the flat disc on the cigarette rolling machine according to claim 2, characterized in that, The weight control system for calibrating cigarette rolling machines specifically includes: Under the "target weight sampling" setting mode of the cigarette machine, a preset number of cigarettes without nozzles are extracted from the front rail and the rear rail of the cigarette machine, and the target weight value displayed by the weight control system is recorded. Use a balance to weigh the preset number of cigarettes without nozzles extracted from the front and rear rails, and calculate the average weight. If the absolute value of the difference between the average weight and the target weight is less than the first set value, then the weight center value calibration is complete.

5. The method for determining the groove depth of the flat disc on the cigarette rolling machine according to claim 4, characterized in that, The weight control system for calibrating cigarette machines also includes: Under the "random weight sampling" setting mode of the cigarette machine, a preset number of cigarettes without nozzles are extracted from the front and rear rails of the cigarette machine, and the theoretical offset values ​​of the cigarettes without nozzles on the front and rear rails displayed by the weight control system are recorded. Use a balance to weigh each cigarette without a mouthpiece extracted from the front and rear rails, and calculate the actual offset values ​​of the cigarettes without mouthpieces on the front and rear rails respectively. If the absolute value of the difference between the theoretical and actual deviation values ​​of the front and rear rails is less than the second set value, then the random weight calibration is complete.

6. A device for determining the groove depth of a flat disc on a cigarette rolling machine, characterized in that, It includes a travel calculation module, a relationship acquisition module, a density determination module, and a depth calculation module; The travel calculation module is used to calculate the movable travel of the leveling plate; The relationship acquisition module is used to obtain the relationship between the position of the flat plate and the average density of the cigarette when the cigarette machine is in the start state, using a flat plate without grooves, with a preset filling value of tobacco and a preset length and diameter of cigarette. The density determination module is used to determine the density of the two dense ends and the flat section between the two dense ends of the preset cigarette based on the target weight of the preset cigarette, the increment of the two dense ends, and the length. The depth calculation module is used to determine the position of the flat plate corresponding to the density of the two dense ends and the flat section based on the relationship between the position of the flat plate and the average density of the cigarette, and to take the difference between the position of the flat plate corresponding to the two dense ends and the position of the flat plate corresponding to the flat section as the groove depth of the two dense ends.

7. The device for determining the groove depth of the flat disc on a cigarette rolling machine according to claim 6, characterized in that, It also includes a calibration module.

8. The device for determining the groove depth of the flat disc on a cigarette rolling machine according to claim 6, characterized in that, The travel calculation module includes a first distance measurement module, a second distance measurement module, and a difference calculation module; The first distance measurement module is used to manually move the leveling plate to the upper limit position when the cigarette machine is stopped, and to measure the first distance between the leveling plate and the suction guide rail. The second distance measurement module is used to manually move the leveling disc to the lower limit position and measure the second distance between the leveling disc and the wire suction guide rail; The difference calculation module is used to take the difference between the first distance and the second distance as the movable stroke of the leveling disk.

9. The device for determining the groove depth of the flat disc on a cigarette rolling machine according to claim 7, characterized in that, The calibration module includes a target weight recording module, an average weight calculation module, and a first judgment module; The target weight recording module is used to extract a preset number of cigarettes without nozzles from the front and rear rails of the cigarette machine under the "target weight sampling" setting mode, and record the target weight value displayed by the weight control system. The average weight calculation module is used to weigh a preset number of cigarettes without nozzles extracted from the front and rear rails using a balance, and calculate the average weight. The first judgment module is used to determine that the weight center value calibration is complete when the absolute value of the difference between the average weight and the target weight is less than a first set value.

10. The device for determining the groove depth of the flat disc on a cigarette rolling machine according to claim 9, characterized in that, The calibration module also includes a theoretical calibration recording module, an actual calibration calculation module, and a second judgment module; The theoretical calibration recording module is used to extract a preset number of cigarettes without nozzles from the front and rear rails of the cigarette machine under the "random weight sampling" setting mode, and record the theoretical calibration values ​​of the cigarettes without nozzles on the front and rear rails displayed by the weight control system. The actual calibration calculation module is used to weigh each cigarette without a mouthpiece extracted from the front and rear rails using a balance, and to calculate the actual calibration value of the cigarette without a mouthpiece on the front and rear rails respectively. The second judgment module is used to determine that the weight random calibration is completed when the absolute value of the difference between the theoretical and actual deviation values ​​of the front and rear rails is less than the second set value.

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