Bamboo joint filter stick detecting and removing method and forming machine

Abstract

The invention provides a bamboo joint filter stick detecting and removing method and a forming machine, and relates to the technical field of tobacco production. According to the bamboo joint filter stick detecting and removing method, the vehicle speed of a forming machine is converted into an adjusting value through a sub-controller, the opening and closing degree of a proportional valve is controlled according to the adjusting value till the adjusting value reaches a set value, a gas flow detector detects the gas flow at a conveying nozzle and serves as a comparison value, and the sub-controller converts the comparison value into the real-time gas flow of the conveying nozzle; the sub-controller is connected with the proportional valve, the difference value is obtained from the rated air flow of the proportional valve, whether the difference value is within a set range or not is judged, if yes, the current filter stick is marked as a qualified product and output, if not, the sub-controller conducts starting point phase marking on the filter stick with the difference value exceeding the set range and records the filter stick as a bamboo joint filter stick, and the main controller tracks the bamboo joint filter stick and removes the bamboo joint filter stick at the downstream of the forming machine. According to the bamboo joint filter stick detecting and removing method and the forming machine, the monitoring accuracy of the bamboo joint filter sticks can be improved, the bamboo joint filter sticks are removed in time, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of tobacco production technology, and in particular to a method for detecting and rejecting bamboo-joint filter rods and a forming machine. Background Technology

[0002] In tobacco processing, the filter rod forming machine is a core piece of equipment, undertaking the crucial task of filter rod manufacturing. However, during the operation of the forming machine, unstable air supply from the conveying nozzles can easily lead to the formation of bamboo-like filter rods. Because some sections of these bamboo-like filter rods exceed the hardness standard, they can cause abnormal cigarette smoke resistance and overall ventilation, thereby reducing the sensory evaluation effect and affecting product quality.

[0003] When bamboo-joint filter rods are formed, the filter rod filaments are pulsed and overfilled as they pass through the guide tongue, which vibrates noticeably. In existing technology, workers typically assess the formation of bamboo-joint filter rods by observing the stability of the air pressure gauge at the filament delivery nozzle and the vibration of the guide tongue. However, the vibration generated by the forming machine itself interferes with the pressure gauge readings and guide tongue vibration assessments, leading to inaccurate monitoring of the bamboo-joint filter rods. This increases the risk of bamboo-joint filter rods being mixed with qualified ones, raising the probability of batch scrapping of finished products and increasing production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a method and forming machine for detecting and rejecting bamboo-joint filter rods. This method and forming machine can improve the accuracy of monitoring bamboo-joint filter rods and remove them in a timely manner, thereby reducing production costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A method for detecting and rejecting bamboo-joint filter rods is applied to a forming machine, and the method detects and rejects bamboo-joint filter rods during the forming process. The method includes:

[0007] S1, Pre-processing: A gas flow detector is installed in the delivery nozzle of the molding machine, and the gas flow detector is connected to the sub-controller in the molding machine.

[0008] S2, set the opening and closing degree of the proportional valve in the main controller of the molding machine, and set the air flow rate corresponding to each opening and closing degree of the proportional valve;

[0009] S3, start the molding machine, the sub-controller converts the speed of the molding machine into an adjustment value, and controls the opening and closing degree of the proportional valve according to the adjustment value until the adjustment value of the molding machine speed reaches the set value. At this time, the proportional valve delivers airflow to the conveying nozzle at the rated airflow.

[0010] S4, the gas flow detector detects the gas flow at the delivery nozzle and transmits it to the sub-controller in the form of a comparison value. The sub-controller converts the comparison value into the real-time gas flow at the delivery nozzle.

[0011] S5, the sub-controller calculates the difference between the real-time air flow rate of the delivery nozzle and the rated air flow rate of the proportional valve, and determines whether the difference is within the set range. If it is, the current filter rod is marked as a qualified product and outputs the result. If not, proceed to S6.

[0012] S6, the sub-controller marks the starting phase of the filter rod whose difference exceeds the set range, records the marked filter rod as a bamboo joint filter rod, and transmits the marking information to the main controller. The main controller tracks the bamboo joint filter rod and removes the bamboo joint filter rod downstream of the forming machine.

[0013] As a further technical solution, the sub-controller records the number of marked bamboo filter rods per unit time. When the number of marked rods exceeds the stop setting value, the sub-controller sends a stop signal to the main controller, and the main controller controls the molding machine to stop.

[0014] As a further technical solution, the shutdown setting is set to 100 bamboo filter rods per minute.

[0015] As a further technical solution, the opening degree of the proportional valve is set from 0° to 180°, and the air flow rate corresponding to each opening degree of the proportional valve is from 0 ml / min to the preset maximum flow rate of the main controller.

[0016] As a further technical solution, the sub-controller outputs the speed of the molding machine in the form of an analog voltage, and uses it as the adjustment value. The range of the adjustment value is set to 0V to 10V. When the adjustment value is set to 10V, the rated air flow of the proportional valve is the maximum flow preset by the main controller.

[0017] As a further technical solution, the gas flow detector detects the gas flow at the delivery nozzle and outputs it in the form of analog voltage or current, and uses it as the comparison value. The range of the comparison value is set to 0V to 10V, or 4mA to 20mA. The range of the real-time gas flow at the delivery nozzle corresponding to the comparison value is from 0ml / min to the preset maximum flow of the total controller.

[0018] A forming machine is used to implement the above-mentioned bamboo-joint filter rod detection and rejection method, the forming machine comprising:

[0019] A forming module, wherein a conveying nozzle is provided in the forming module;

[0020] An air distribution module is disposed in the forming module. The output end of the proportional valve in the air distribution module is connected to the delivery nozzle. The air distribution module delivers airflow to the delivery nozzle.

[0021] A gas flow detector is installed at the front end of the delivery nozzle;

[0022] The control module includes a main controller, the gas flow detector is communicatively connected to the sub-controller, and the main controller is communicatively connected to the sub-controller, the proportional valve, and the rejection module downstream of the forming machine.

[0023] As a further technical solution, the valve distribution module also includes a valve distribution assembly and a regulating valve. The output end of the valve distribution assembly is connected to the proportional valve, and the regulating valve is disposed between the valve distribution assembly and the proportional valve.

[0024] As a further technical solution, the molding machine also includes a display component, which is disposed in the molding module and is simultaneously communicatively connected to the gas flow detector and the control module.

[0025] As a further technical solution, the molding machine also includes a prompting component, which is disposed in the molding module and is communicatively connected to both the gas flow detector and the control module.

[0026] Compared with the prior art, the bamboo-joint filter rod detection and rejection method and forming machine provided by the present invention have the following technical advantages:

[0027] 1. By installing a gas flow detector at the delivery nozzle, the gas flow detector can directly collect the gas flow data of the delivery nozzle in real time and transmit the data to the sub-controller in the form of a comparison value. The controller accurately converts this data into real-time gas flow, thus comparing the real-time gas flow at the delivery nozzle with the rated flow of the proportional valve to monitor the real-time gas flow at the delivery nozzle. Therefore, during the transmission of gas flow values, the gas flow is transmitted in the form of a converted comparison value, rather than directly transmitting the gas flow at the delivery nozzle. This minimizes the possibility of inaccurate detection results due to gas flow loss during transmission. Furthermore, the entire monitoring process requires no manual intervention, fundamentally avoiding the interference of vibration on the monitoring results, thereby improving the accuracy of the bamboo-joint filter rod judgment.

[0028] 2. The sub-controller adjusts the value according to the speed of the molding machine and controls the opening and closing of the proportional valve until the speed adjustment value reaches the set value, so as to ensure that the proportional valve supplies air to the conveying nozzle at the rated air flow rate. It can optimize the air flow rate of the proportional valve in real time according to the speed of the molding machine, so as to avoid the situation of pulsed overfilling of the filament bundle caused by the mismatch between the speed of the molding machine and the flow rate of the proportional valve. This reduces the probability of bamboo-shaped filter rods.

[0029] 3. When the sub-controller determines that the difference between the real-time airflow of the delivery nozzle and the rated airflow of the proportional valve exceeds the set range, it will mark the starting phase of the corresponding filter rod and synchronize the marking information to the main controller. Therefore, by monitoring the airflow in real time and marking the specific location of the bamboo-shaped filter rod, the main controller can track the bamboo-shaped filter rod based on the marking information. Downstream of the forming machine, the bamboo-shaped filter rod can be accurately removed based on the marking information from the main controller, thereby effectively preventing the bamboo-shaped filter rod from entering subsequent processes, reducing the risk of batch scrap of finished products, and thus reducing production costs. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0031] Figure 1 This is a flowchart of the bamboo-joint filter rod detection and rejection method provided in the embodiments of the present invention;

[0032] Figure 2 This is a simplified schematic diagram of the molding module in the molding machine of the present invention;

[0033] Figure 3 This is a simplified schematic diagram of part of the molding machine of the present invention;

[0034] Figure 4 A cross-sectional view of a qualified filter rod;

[0035] Figure 5 This is a cross-sectional view of a bamboo-joint filter rod.

[0036] In the picture:

[0037] 100. Gas flow detector;

[0038] 210. Proportional valve; 220. Valve distribution assembly; 230. Control valve;

[0039] 310. Conveying nozzle; 320. Fiber bundle input module; 330. Filter paper feeding module; 340. Forming module. Detailed Implementation

[0040] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0041] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0042] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0043] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0044] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0045] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0046] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0047] Combination Figure 1 As shown, this embodiment provides a method for detecting and removing bamboo-joint filter rods. This method is applied to a molding machine and detects and removes bamboo-joint filter rods during the molding process, thereby improving the accuracy of monitoring the bamboo-joint filter rods and removing them in a timely manner, thus reducing production costs. Specifically, the first step is pretreatment, in which a gas flow detector 100 is installed in the conveying nozzle 310 of the molding machine, and the gas flow detector 100 is connected to the sub-controller in the molding machine.

[0048] The second step is to set the opening and closing degree of the proportional valve 210 in the main controller of the molding machine, and set the air flow rate corresponding to each opening and closing degree of the proportional valve 210.

[0049] The third step is to start the molding machine. The sub-controller converts the speed of the molding machine into an adjustable value and controls the opening and closing degree of the proportional valve 210 according to the adjustable value until the adjustable value of the molding machine speed reaches the set value. At this time, the proportional valve 210 delivers airflow to the conveying nozzle 310 at the rated airflow rate.

[0050] Fourth, the gas flow detector 100 detects the gas flow at the delivery nozzle 310 and transmits it to the sub-controller in the form of a comparison value. The sub-controller converts the comparison value into the real-time gas flow of the delivery nozzle 310.

[0051] The fifth step involves the sub-controller calculating the difference between the real-time airflow of the delivery nozzle 310 and the rated airflow of the proportional valve 210, and determining whether the difference is within the set range. If it is, the current filter rod is marked as a qualified product and output; otherwise, the sixth step is performed.

[0052] The sixth step involves the sub-controller marking the starting phase of filter rods whose difference exceeds the set range, designating the marked filter rods as bamboo-joint filter rods, and transmitting the marking information to the main controller. The main controller then tracks the bamboo-joint filter rods and removes them downstream of the forming machine.

[0053] For ease of understanding, this embodiment provides simplified cross-sectional views of qualified filter rods and bamboo-joint filter rods. Specifically, the simplified cross-sectional view of a qualified filter rod is as follows: Figure 4 As shown, a cross-sectional view of the bamboo-joint filter rod. Figure 5 As shown.

[0054] Because a gas flow detector 100 is installed at the delivery nozzle 310, the gas flow detector 100 can directly collect the gas flow data of the delivery nozzle 310 in real time and transmit the data to the sub-controller in the form of a comparison value. The controller accurately converts the data into real-time gas flow, thereby comparing the real-time gas flow at the delivery nozzle 310 with the rated flow of the proportional valve 210 to monitor the real-time gas flow at the delivery nozzle 310. Therefore, in the process of transmitting the gas flow value, the gas flow is transmitted in the form of a converted comparison value, rather than directly transmitting the gas flow at the delivery nozzle 310. This minimizes the possibility of inaccurate detection results due to gas flow loss during transmission. Furthermore, the entire monitoring process requires no manual intervention, fundamentally avoiding the interference of vibration on the monitoring results, thus improving the accuracy of the bamboo filter rod judgment.

[0055] Because the sub-controller adjusts the value according to the speed of the molding machine and controls the opening and closing of the proportional valve 210 until the speed adjustment value reaches the set value, it ensures that the proportional valve 210 supplies air to the conveying nozzle 310 at the rated air flow rate. It can optimize the air flow rate of the proportional valve 210 in real time according to the speed of the molding machine, avoiding the situation where the air supply fluctuation at the proportional valve 210 causes pulse-type overfilling of the filament bundle due to the mismatch between the speed of the molding machine and the flow rate of the proportional valve 210, thereby reducing the probability of bamboo-joint filter rods being generated.

[0056] When the sub-controller determines that the difference between the real-time airflow of the conveying nozzle 310 and the rated airflow of the proportional valve 210 exceeds the set range, it marks the starting phase of the corresponding filter rod and synchronizes the marking information to the main controller. Therefore, by monitoring the airflow in real time and marking the specific location of the bamboo-shaped filter rod, the main controller can track the bamboo-shaped filter rod based on the marking information. Downstream of the molding machine, the main controller can accurately remove the bamboo-shaped filter rod based on the marking information, thereby effectively preventing the bamboo-shaped filter rod from entering subsequent processes, reducing the risk of batch scrap of finished products, and thus reducing production costs.

[0057] Furthermore, the sub-controller records the number of marked bamboo-joint filter rods per unit time. When the number of marked rods exceeds the stop setting value, the sub-controller sends a stop signal to the main controller, which then stops the molding machine. This prevents the molding machine from continuing production while in a faulty state, allows for timely identification of faulty points, and enables prompt shutdown and repair, thereby minimizing the production of bamboo-joint filter rods and further reducing the risk of batch scrap of finished products.

[0058] The number of filter nozzles formed per minute varies depending on the specific model of the forming machine. For example, the KDF3 filter rod forming machine, ZL29 forming unit, and KDF-5MF fine composite rod filter rod forming machine can all form 6,000 filter nozzles per minute at normal production speed. The KDF-M (NWT) hollow rod forming machine forms 5,000 filter nozzles per minute at normal production speed, and the ZL26C fine rod forming unit forms 4,000 filter nozzles per minute at normal production speed. In this embodiment, the model that forms 6,000 filter nozzles per minute at normal production speed is used as an example to explain the shutdown setting. When the normal production speed is 6000 filter tips per minute, the shutdown setting is set to 100 bamboo-joint filter rods per minute. This setting avoids the situation where the forming machine stops due to individual bamboo-joint filter rods, reduces unnecessary production interruptions, and ensures production continuity. At the same time, it effectively limits the proportion of bamboo-joint filter rods per unit time, preventing the mass production of bamboo-joint filter rods due to the forming machine's own malfunction, thus ensuring the filter rod qualification rate of the forming machine.

[0059] In other embodiments, the shutdown setting can also be set to 90, 75, or 68 cigarettes per minute, and is not limited to 100 cigarettes per minute as in this embodiment.

[0060] Preferably, the opening and closing angle of the proportional valve 210 is set from 0° to 180°, and the air flow rate corresponding to each opening and closing angle of the proportional valve 210 is from 0 ml / min to the maximum flow rate preset by the main controller. In this way, the air flow rate delivered to the delivery nozzle 310 can be precisely controlled through the structure of the proportional valve 210 itself, thereby ensuring the stability of the airflow at the delivery nozzle 310.

[0061] Depending on the specific model of the forming machine, the maximum air flow rate of the proportional valve 210 varies. Taking the KDF3E fiber filter rod forming machine as an example, the maximum air flow rate is set to 36%. When the production speed reaches 6000 pieces per minute, the opening degree of the proportional valve 210 is 64.8°, corresponding to an air consumption of 508L per minute. Assuming that the proportional valve 210 needs to supply at least 508L of gas to the conveying nozzle 310 per minute, the air flow rate supplied by the proportional valve 210 to the conveying nozzle 310 can be controlled by controlling the opening degree of the proportional valve 210. For example, when the production speed is 5000 pieces per minute, the opening degree of the proportional valve 210 is 54°, supplying 424L of air to the conveying nozzle 310 per minute; when the opening degree of the proportional valve 210 is 180°, it supplies 1411L of air to the conveying nozzle 310 per minute.

[0062] Preferably, the sub-controller outputs the molding machine speed as an analog voltage value, which is used as the adjustment value. The adjustment value range is set to 0V to 10V, and the set value is 10V. The rated air flow of the proportional valve 210 is the maximum flow preset by the main controller. The analog voltage signal has a continuously changing characteristic; therefore, by observing the changes in the analog voltage, subtle fluctuations in the molding machine speed can be accurately reflected, thereby precisely controlling the opening and closing degree of the proportional valve 210. This ensures that the air flow adjustment of the proportional valve 210 matches the real-time machine speed, further reducing the generation of bamboo-like filter rods. Furthermore, the analog voltage signal does not require complex digital encoding and decoding processes. When it is output from the sub-controller to the proportional valve 210, the transmission delay can be minimized, allowing for the fastest possible synchronous adjustment of the proportional valve 210's opening and closing degree according to changes in the molding machine speed. This reduces the probability of short-term unstable air supply due to signal delay. In this embodiment, the adjustment value range is set to 0V to 10V, and the set value is set to 10V. Other embodiments can be adapted accordingly and are not limited to this embodiment.

[0063] Preferably, the gas flow detector 100 detects the gas flow at the delivery nozzle 310 and outputs it as an analog voltage or current as a comparison value. The range of the comparison value is set to 0V to 10V, or 4mA to 20mA. The range of the real-time gas flow at the delivery nozzle 310 corresponding to the comparison value is from 0mL / min to the maximum flow preset by the main controller. When the real-time gas flow at the delivery nozzle 310 fluctuates slightly, the analog voltage or current accurately captures the subtle changes in airflow and outputs the comparison value as a corresponding change in signal strength, ensuring the continuity of the output comparison value and improving the monitoring sensitivity of the bamboo filter rod. At the same time, both the analog voltage signal and the current signal have strong anti-interference capabilities. During signal transmission, they can avoid the influence of mechanical vibration, electromagnetic interference, etc., thereby avoiding misjudgment of the gas flow difference by the sub-controller due to signal interference, and further improving the accuracy of the bamboo filter rod judgment. In this embodiment, when the comparison value is output as an analog voltage, the range is set to 0V to 10V, and when it is output as a current, the range is 4mA to 20mA. Other embodiments can be adapted and are not limited to this embodiment.

[0064] Combination Figure 2 and Figure 3As shown, this embodiment also provides a molding machine. The molding machine adopts the above-mentioned bamboo-joint filter rod detection and rejection method. The molding machine includes a molding module, a gas distribution module, a gas flow detector 100, and a control module. A conveying nozzle 310 is provided in the molding module. The gas distribution module is located in the molding module. The output end of the proportional valve 210 in the gas distribution module is connected to the conveying nozzle 310, and the gas distribution module conveys airflow to the conveying nozzle 310. The gas flow detector 100 is located at the front end of the conveying nozzle 310. The control module includes a main controller. The gas flow detector 100 is communicatively connected to the sub-controller. The main controller is communicatively connected to the sub-controller, the proportional valve 210, and the rejection module downstream of the molding machine.

[0065] Specifically, after the molding machine is started, the sub-controller outputs the molding machine speed as an analog voltage, which is used as an adjustment value. Based on this adjustment value, the sub-controller controls the opening and closing of the proportional valve 210 until the molding machine speed adjustment value reaches the set value. The adjustment value ranges from 0V to 10V, and the set value is 10V. At this point, the proportional valve 210 delivers airflow to the delivery nozzle 310 at the rated airflow rate. Afterward, the gas flow detector 100 detects the gas flow rate at the delivery nozzle 310. The gas flow rate at the delivery nozzle 310 is output as an analog voltage or current, and this is used as a comparison value transmitted to the sub-controller. The sub-controller converts the comparison value into the real-time gas flow rate of the delivery nozzle 310. The comparison value ranges from 0V to 10V, or 4mA to 20mA. The range of the real-time gas flow rate of the delivery nozzle 310 corresponding to the comparison value is from 0ml / min to the maximum flow rate preset by the main controller. The sub-controller then calculates the difference between the real-time airflow of the conveying nozzle 310 and the rated airflow of the proportional valve 210, and determines whether the difference is within the set range. If it is, the current filter rod is marked as a qualified product and output. If not, the sub-controller marks the filter rod with a starting phase for the difference exceeding the set range, records the marked filter rod as a bamboo-joint filter rod, and transmits the marking information to the main controller. The main controller tracks the marked bamboo-joint filter rods and removes them downstream of the molding machine, thus preventing them from entering subsequent processes and reducing the risk of batch scrapping of finished products, thereby reducing production costs. Furthermore, when the sub-controller records the number of marked bamboo-joint filter rods per unit time, if the number of marked rods exceeds the stop setting value, the sub-controller sends a stop signal to the main controller. The main controller then stops the molding machine, preventing the molding machine from continuing production under fault conditions. This allows for timely detection of molding machine malfunctions, prompt shutdown and repair, minimizing the production of bamboo-joint filter rods and further reducing the risk of batch scrapping of finished products.

[0066] The forming module also includes a filament input module 320, a filter paper feeding module 330, and a forming module 340. The conveying nozzle 310 is located downstream of the filament input module 320. After the filament is gathered and blown by the conveying nozzle 310, it enters the forming module 340 through the guide tongue. At the same time, the filter paper is coated with adhesive and then wrapped around the filament that has passed through the conveying nozzle 310 before being formed in the forming module 340.

[0067] Preferably, the air distribution module further includes an air distribution assembly 220 and a regulating valve 230. The output end of the air distribution assembly 220 is connected to the proportional valve 210, and the regulating valve 230 is located between the air distribution assembly 220 and the proportional valve 210. The air distribution assembly 220 provides the basic airflow for the subsequent air path of the molding machine. The proportional valve 210 needs to dynamically output the rated airflow according to the speed of the molding machine. By setting the regulating valve 230 between the two, the airflow output by the air distribution assembly 220 can be initially adjusted by the regulating valve 230, and then the airflow can be adjusted a second time according to the speed of the molding machine, finally outputting a precise rated airflow. This avoids the situation where the proportional valve 210 directly receives the air distribution assembly 220, which may cause large fluctuations in airflow due to instantaneous changes in air source pressure, reduces the adjustment load of the proportional valve 210, and further improves the stability of airflow at the delivery nozzle 310.

[0068] To further monitor the real-time airflow at the conveying nozzle 310 and the operating status of the molding machine, this embodiment also includes a display unit. The display unit is located in the molding module and is communicatively connected to both the gas flow detector 100 and the control module. When the gas flow detector 100 detects abnormal fluctuations in the real-time airflow at the conveying nozzle 310, it displays this information on the display. Simultaneously, the display also shows parameters indicating abnormal fluctuations in the real-time airflow, the shutdown setting value, the status of the bamboo filter rod markings, the bamboo filter rod rejection status, the total number of bamboo filter rods produced, and the number of bamboo filter rods produced per unit time. This enhances the operator's ability to monitor various conditions of the molding machine.

[0069] Preferably, the molding machine also includes a warning device, which is installed in the molding module and communicates with both the gas flow detector 100 and the control module. The warning device can directly issue an alarm based on the detection results of the gas flow detector 100. For example, when the gas flow fluctuates beyond the normal range, the warning device issues a first light or sound warning; when the control module detects that the amount of bamboo-shaped filter rods produced per unit time is approaching the stop setting value, the warning device issues a second light or sound warning; when the control module detects that the amount of bamboo-shaped filter rods produced per unit time exceeds the stop setting value, the warning device issues a third light or sound warning. Through the different warning effects of the warning device, the convenience and timeliness of operators in understanding various conditions of the molding machine are improved.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for detecting and rejecting bamboo-joint filter rods, applied to a forming machine, for detecting and rejecting bamboo-joint filter rods during the forming process of filter rods in the forming machine, characterized in that... The method for detecting and removing bamboo-joint filter rods includes: S1, Pre-processing: A gas flow detector (100) is placed in the conveying nozzle (310) of the molding machine, and the gas flow detector (100) is connected to the sub-controller in the molding machine for communication. S2, set the opening degree of the proportional valve (210) in the main controller of the molding machine, and set the air flow rate corresponding to each opening degree of the proportional valve (210); S3, start the molding machine, the sub-controller converts the speed of the molding machine into an adjustment value, and controls the opening and closing degree of the proportional valve (210) according to the adjustment value until the adjustment value of the speed of the molding machine reaches the set value. At this time, the proportional valve (210) delivers airflow to the conveying nozzle (310) with the rated airflow. S4, the gas flow detector (100) detects the gas flow at the delivery nozzle (310) and transmits it to the sub-controller in the form of a comparison value. The sub-controller converts the comparison value into the real-time gas flow of the delivery nozzle (310). S5, the sub-controller calculates the difference between the real-time air flow rate of the delivery nozzle (310) and the rated air flow rate of the proportional valve (210), and determines whether the difference is within the set range. If it is, the current filter rod is marked as a qualified product and outputs the result. If not, proceed to S6. S6, the sub-controller marks the starting phase of the filter rod whose difference exceeds the set range, records the marked filter rod as a bamboo joint filter rod, and transmits the marking information to the main controller. The main controller tracks the bamboo joint filter rod and removes the bamboo joint filter rod downstream of the forming machine.

2. The method for detecting and rejecting bamboo-joint filter rods according to claim 1, characterized in that, The sub-controller records the number of marked bamboo filter rods per unit time and determines whether the number of marks exceeds the stop setting value. If so, the sub-controller sends a stop signal to the main controller, and the main controller controls the molding machine to stop. If not, the molding machine continues to operate.

3. The method for detecting and removing bamboo-joint filter rods according to claim 2, characterized in that, The shutdown setting is set to 100 bamboo filter rods per minute.

4. The method for detecting and rejecting bamboo-joint filter rods according to claim 1, characterized in that, The opening and closing degree of the proportional valve (210) is set from 0° to 180°, and the air flow rate corresponding to each opening and closing degree of the proportional valve (210) is from 0 ml / min to the maximum flow rate preset by the total controller.

5. The method for detecting and rejecting bamboo-joint filter rods according to claim 1, characterized in that, The sub-controller outputs the speed of the molding machine in the form of an analog voltage and uses it as the adjustment value. The range of the adjustment value is set to 0V to 10V. When the adjustment value is set to 10V, the rated air flow of the proportional valve (210) is the maximum flow preset by the main controller.

6. The method for detecting and rejecting bamboo-joint filter rods according to claim 5, characterized in that, The gas flow detector (100) detects the gas flow at the delivery nozzle (310) and outputs it in the form of analog voltage or current, and uses it as the comparison value. The range of the comparison value is set to 0V to 10V, or 4mA to 20mA. The range of the real-time gas flow at the delivery nozzle (310) corresponding to the comparison value is from 0ml / min to the maximum flow preset by the total controller.

7. A molding machine, characterized in that, The forming machine is used to implement the bamboo-joint filter rod detection and rejection method according to any one of claims 1-6, and the forming machine includes: A molding module, wherein a conveying nozzle (310) is provided in the molding module. An air distribution module is provided in the forming module. The output end of the proportional valve (210) in the air distribution module is connected to the delivery nozzle (310). The air distribution module delivers airflow to the delivery nozzle (310). A gas flow detector (100) is disposed at the front end of the delivery nozzle (310); The control module includes a sub-controller and a main controller. The gas flow detector (100) is communicatively connected to the sub-controller. The main controller is communicatively connected to the sub-controller, the proportional valve (210), and the rejection module downstream of the molding machine.

8. The molding machine according to claim 7, characterized in that, The gas distribution module also includes a gas distribution assembly (220) and a regulating valve (230). The output end of the gas distribution assembly (220) is connected to the proportional valve (210), and the regulating valve (230) is disposed between the gas distribution assembly (220) and the proportional valve (210).

9. The molding machine according to claim 7, characterized in that, The molding machine also includes a display unit, which is disposed in the molding module and is communicatively connected to the gas flow detector (100) and the control module.

10. The molding machine according to claim 7, characterized in that, The molding machine also includes a prompting component, which is disposed on the molding module and is communicatively connected to both the gas flow detector (100) and the control module.

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