A cigarette packet top inner liner paper folding defect detection device

Abstract

The application discloses a cigarette packet top inner lining paper folding defect detection device applied to a FOCKE350 packaging machine. The device comprises a supporting unit and a signal acquisition unit. The supporting unit comprises a slide rail arranged on one side of a packaging machine mold wheel disc and first and second supports slidably arranged on the slide rail. The signal acquisition unit comprises a color mark sensor and an inductance sensor arranged on the two supports respectively. The signals of the two sensors are connected to the control system of the packaging machine. The control system determines the detection timing according to the trigger signal of the color mark sensor and collects the signal of the inductance sensor to determine whether the inner lining paper is folded defectively. In the use process, the adjustable supporting structure ensures accurate positioning of the sensors, the double sensors work cooperatively, direct and online detection of the folding quality in a compact space is realized, and the detection precision and efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of cigarette pack quality inspection technology, specifically a device for detecting folding defects in the inner lining paper at the top of a cigarette pack. Background Technology

[0002] The folding defect of the inner liner paper at the top of the cigarette pack is a key issue that directly affects the appearance quality of cigarette products. Currently, common quality inspection methods (such as machine vision and capacitive sensing) face engineering challenges due to the inherent structural characteristics of the FOCKE350 packaging machine: the space in the mold wheel area of ​​this model is extremely compact, and the inner liner paper is immediately obscured by the label cover after the top fold is completed. This results in the vision camera having neither sufficient installation space nor a direct field of view, making it impossible to effectively judge the folding state.

[0003] In actual production, either approximate judgments are made at indirect workstations (such as detecting paper jam displacement), or remedial inspections are performed in subsequent processes (such as cigarette bar elevators). Neither of these methods can directly, online, and quickly detect and judge defects at the folding and forming station. Their detection results are delayed, have a low signal-to-noise ratio, and are highly susceptible to interference from other factors, resulting in insufficient reliability. Therefore, the FOCKE350 packaging machine urgently needs a new direct detection principle and solution that can overcome space and field-of-view limitations, is suitable for this specific compact working condition, and matches the high-speed operation rhythm of the equipment.

[0004] Therefore, this application proposes a device for detecting folding defects in the top inner lining paper of cigarette packs, which can achieve direct and online detection under the compact space of the FOCKE350 equipment mold wheel and visual obstruction conditions, and accurately and stably identify the folding state of the top inner lining paper of cigarette packs. Utility Model Content

[0005] The main objective of this application is to provide a device for detecting folding defects in the inner lining paper of cigarette packs, which aims to solve the technical problem that direct, online, and stable detection cannot be achieved at this station due to the compact space and obstructed view in the mold wheel area of ​​the FOCKE350 packaging machine.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A device for detecting folding defects in the inner liner paper of cigarette packs, applied to a FOCKE350 packaging machine with a die disc, comprising:

[0008] The support unit includes a slide rail disposed on one circumferential side of the mold wheel, and a first bracket and a second bracket slidably mounted on the slide rail; the mounting end of the first bracket extends above one of the pause positions of the mold wheel, and the mounting end of the second bracket extends to the exposed end of the cigarette pack that is stopped at the same pause position.

[0009] The signal acquisition unit includes a color mark sensor and an inductor sensor; the color mark sensor is located at the mounting end of the first bracket and is used to detect passing cigarette packs and generate a position trigger signal; the inductor sensor is located at the mounting end of the second bracket and is used to output an electrical signal characterizing the folding state of the inner lining paper.

[0010] The signal output terminals of the color mark sensor and the inductance sensor are both connected to the control system of the packaging machine. The control system is used to determine whether the inner lining paper at the top of the cigarette pack has a folding defect based on the position trigger signal and the electrical signal.

[0011] As a further improvement of this application, the slide rail is an arc-shaped guide rail coaxial with the mold wheel; the top surface of the slide rail is provided with a first slide groove and a second slide groove coaxial with it; a first slider and a second slider are respectively provided in the first slide groove and the second slide groove, and the first bracket and the second bracket are respectively fixedly installed on the first slider and the second slider; after the position adjustment is completed, the first slider and the second slider are locked to the slide rail by the first fastener and the second fastener respectively.

[0012] As a further improvement of this application, the arc radius of the first slide groove is greater than that of the second slide groove; a first limiting groove communicating with the first slide groove is provided on the outer arc side of the slide rail along its extension direction, and a second limiting groove communicating with the second slide groove is provided on the inner arc side of the slide rail along its extension direction, and the extension paths of the first limiting groove and the second limiting groove are both coaxial with the slide rail.

[0013] As a further improvement of this application, both the first fastener and the second fastener are bolts; after the screw end of the first fastener extends into the first limiting groove, the thread passes through the first slider, and its end abuts against the inner wall of the first slide groove near the second slide groove; after the screw end of the second fastener extends into the second limiting groove, the thread passes through the second slider, and its end abuts against the inner wall of the second slide groove near the first slide groove.

[0014] As a further improvement of this application, the first bracket includes a vertical rod erected on the first slider, and a horizontal rod with one end vertically connected to the top of the vertical rod; the other end of the horizontal rod extends above the pause station of the mold wheel and is connected to one end of a horizontally set first mounting plate, and the color mark sensor is mounted on the first mounting plate.

[0015] As a further improvement of this application, the second bracket includes a horizontally arranged connecting plate, one end of which is fixedly mounted on the second slider, and the other end of which extends toward the exposed end of the cigarette pack that is stopped at the same pause position and is vertically connected to the bottom end of a vertically arranged second mounting plate, and the inductive sensor is mounted on the second mounting plate.

[0016] The technical solution provided in this application may include the following beneficial effects:

[0017] In this application, a color mark sensor and an inductive sensor are collaboratively placed near the die plate station and integrated into the existing control system of the packaging machine. The color mark sensor generates a precise trigger signal by detecting the position of the cigarette pack, providing a timing reference for the system. The inductive sensor, within the effective window of the trigger signal, acquires the position information of the inner aluminum foil lining at the top of the cigarette pack in real time and converts it into an electrical signal. The control system receives and compares these two signals to accurately determine whether the inner lining paper has folding defects. Utilizing the existing control resources of the equipment, without changing the core logic of the host machine, it achieves effective coverage of the original detection blind spots within a compact space, overcoming the shortcomings of traditional visual inspection, which is impossible to implement, and the low reliability of indirect inspection. While achieving online real-time identification, it can also cooperate with rejection equipment to perform precise rejection, reducing downtime and manual intervention caused by defects, and improving production efficiency and the level of automation in quality control. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of a device for detecting folding defects in the inner lining paper of a cigarette pack. Figure 1 ;

[0020] Figure 2 yes Figure 1 A three-dimensional structural diagram of the middle slide rail;

[0021] Figure 3 A three-dimensional structural diagram of a device for detecting folding defects in the inner lining paper of a cigarette pack. Figure 2 ;

[0022] Figure label:

[0023] 1. Support unit; 11. Slide rail; 111. First slide groove; 112. Second slide groove; 113. First limiting groove; 114. Second limiting groove; 12. First bracket; 121. Upright pole; 122. Crossbar; 123. First mounting plate; 13. Second bracket; 131. Connecting plate; 132. Second mounting plate; 14. First slider; 15. Second slider; 17. First fastener; 18. Second fastener; 2. Signal acquisition unit; 21. Color mark sensor; 22. Inductive sensor; Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] Figure 1 An embodiment of a device for detecting folding defects in the inner lining paper of a cigarette pack, as described in this application, is shown below. Figure 1 In this embodiment, the device for detecting folding defects in the inner lining paper at the top of the cigarette pack includes a support unit 1 and a signal acquisition unit 2, which is applied to a FOCKE350 packaging machine with a mold wheel.

[0026] Among them, see Figure 1The support unit 1 includes a slide rail 11 located on one side of the mold wheel, and a first bracket 12 and a second bracket 13 slidably mounted on it. The mounting end of the first bracket 12 extends above a certain pause position of the mold wheel, while the mounting end of the second bracket 13 is arranged corresponding to the exposed end of the cigarette pack at the same position. The signal acquisition unit 2 includes a color mark sensor 21 and an inductor sensor 22 respectively mounted on the mounting ends of the two brackets. The color mark sensor 21 is used to detect the passage of the cigarette pack and generate a position trigger signal, while the inductor sensor 22 is used to collect electrical signals reflecting the folding state of the inner lining paper. The signal output ends of both sensors are connected to the original control system of the packaging machine. In actual operation, the trigger signal provided by the color mark sensor 21 establishes the detection timing reference, and the inductor sensor 22 acquires the position information of the aluminum foil paper on the top of the cigarette pack within the effective time window. The control system achieves accurate judgment of poor folding of the inner lining paper by comprehensively comparing the two types of signals. By making full use of the existing control resources of the equipment, without changing the core logic of the host, it can effectively cover the original blind spots of the mold wheel station, overcome the shortcomings of traditional visual inspection which cannot be implemented and the low reliability of indirect inspection, and complete online real-time identification. At the same time, it can cooperate with rejection equipment to complete accurate rejection, reduce downtime and manual intervention caused by defects, and improve production efficiency and the level of automation of quality control.

[0027] It should be noted that the mold roller, as the core component of the FOCKE350 packaging machine, has eight box molds evenly distributed around its circumference to support the cigarette packs. During the packaging process, the mold roller rotates intermittently according to a set rhythm, pausing after each rotation (45 degrees), allowing each cigarette pack in the box mold to complete the corresponding folding and packaging actions at eight different pause positions. It is this periodic "motion-pause" rhythm that provides a possible time window for online detection. The detection station involved in this application is a specific location among these eight pause positions. During the pause at this station, the inner lining paper at the top of the cigarette pack has been folded but not yet completely covered by the label paper, and its aluminum foil portion still has an exposed area available for detection. Therefore, precisely mounting the color mark sensor 21 above and the inductive sensor 22 to the side front of this station, respectively, is precisely to utilize the moment when the cigarette pack is stationary to synchronously and directly sample and detect the folding state of its inner lining paper. This installation method ensures precise synchronization between the detection action and the equipment rhythm, which is the structural basis for realizing online, real-time detection.

[0028] Optionally, the detection end of the color mark sensor 21 faces the upper surface of the cigarette pack on the mold wheel, so that the light spot formed by it can cover the aluminum foil area of ​​the inner lining paper at the top of the cigarette pack.

[0029] Optionally, the detection end of the inductive sensor 22 is perpendicular to the plane of the aluminum foil at the exposed end of the cigarette pack, and its detection surface is kept parallel to the surface of the aluminum foil to obtain the optimal detection signal.

[0030] In a preferred embodiment, the color mark sensor 21 is a photoelectric sensor that can emit red visible light laser, and its spot diameter can be adjusted to 3mm; the inductive sensor 22 is an eddy current proximity sensor, and its detection distance can be precisely adjusted, with a range covering 0-5mm.

[0031] Further, see Figure 2 The slide rail 11 is an arc-shaped guide rail coaxial with the mold wheel. The top surface of the slide rail 11 has a first groove 111 and a second groove 112 coaxial with it. A first slider 14 and a second slider 15, which can slide along the groove, are respectively provided in the first groove 111 and the second groove 112. The bottoms of the first bracket 12 and the second bracket 13 are respectively fixedly installed on the first slider 14 and the second slider 15. When the first slider 14 and the second slider 15 slide to a predetermined position in their respective grooves, they can be locked onto the slide rail 11 by the first fastener 17 and the second fastener 18, thereby achieving fine adjustment and fixation of the sensor position.

[0032] Optionally, the slide rail 11 can be fixed to the body of the packaging machine or other stable support equipment by standard connecting components such as connecting frames, so that it can be reliably suspended and positioned on one side of the mold wheel disk in the circumferential direction, which will not interfere with the normal operation of the equipment and can provide a stable mounting base for the sensor.

[0033] Optionally, an interference fit can be used between the first slider 14 and the first slide groove 111, and between the second slider 15 and the second slide groove 112. This provides initial damping for the movement of the slider within the slide groove, preventing it from sliding due to gravity or equipment vibration during initial coarse positioning, thus facilitating subsequent fine position adjustments. Before final locking, the slider can be moved by using a slight external force to overcome the friction of the interference fit; after adjustment to the optimal position, the corresponding fasteners are tightened, working together with the interference fit to achieve double locking of the slider on the slide rail 11, further enhancing the rigidity and stability of the entire support unit 1 under high-speed operating conditions.

[0034] Further, see Figure 2 The radius of the arc of the first slide groove 111 is designed to be larger than the radius of the arc of the second slide groove 112. A first limiting groove 113 communicating with the first slide groove 111 is formed on the outer arc side of the slide rail 11 along its extension direction, while a second limiting groove 114 communicating with the second slide groove 112 is formed on the inner arc side of the slide rail 11. The extension paths of both the first limiting groove 113 and the second limiting groove 114 are coaxial with the slide rail 11.

[0035] Further, see Figure 2Both the first fastener 17 and the second fastener 18 are bolts. The screw end of the first fastener 17 extends into the first limiting groove 113, and its thread passes through the first slider 14. By tightening, its end firmly abuts against the inner wall of the first sliding groove 111 near the second sliding groove 112, achieving locking through friction. Similarly, the screw end of the second fastener 18 extends into the second limiting groove 114, and its thread passes through the second slider 15. Its end abuts against the inner wall of the second sliding groove 112 near the first sliding groove 111, thus locking the second slider 15.

[0036] Optionally, the width of the first limiting groove 113 and the second limiting groove 114 are the same and slightly larger than the outer diameter of the screw of the first fastener 17 and the second fastener 18, so that the screw of the bolt can move and be positioned smoothly in the limiting groove.

[0037] Optionally, the ends of both the first fastener 17 and the second fastener 18 can be provided with structures that facilitate manual operation, such as wing nuts, knurled nuts, or prism heads that are easy to hold with a wrench, so as to facilitate manual adjustment and tightening by the commissioning personnel without tools or with simple tools.

[0038] Further, see Figure 3 The first support 12 includes a vertical rod 121 erected and fixed to the first slider 14, and a horizontal rod 122 with one end vertically connected to the top of the vertical rod 121. The other end of the horizontal rod 122 extends horizontally above the pause position of the mold wheel, and its end is connected to one end of a horizontally set first mounting plate 123. The color mark sensor 21 is mounted on the first mounting plate 123 by standard fasteners or snap-fit ​​structures.

[0039] Optionally, the upright 121 and / or the crossbar 122 can be designed as a manually adjustable telescopic rod structure, for example, using a sleeve design with locking screws. This allows operators to fine-tune the precise position of the color mark sensor 21 in both height and horizontal directions according to actual site conditions, thereby ensuring that the light spot is accurately projected onto the effective detection area at the top of the cigarette pack.

[0040] Further, see Figure 3 The second bracket 13 includes a horizontally arranged connecting plate 131, one end of which is fixedly mounted on the second slider 15, and the other end extends horizontally toward the exposed end of the cigarette pack stopped at the same pause position. The extended end of the connecting plate 131 is vertically connected to the bottom end of an upright second mounting plate 132, on which the inductive sensor 22 is mounted.

[0041] Optionally, the second bracket 13 can adopt a one-piece molded right-angle plate structure. That is, the connecting plate 131 and the second mounting plate 132 are bent from the same piece of material to form a robust L-shaped right-angle structure. The horizontal part of this right-angle plate is fixed to the second slider 15 as the connecting plate 131, and its vertical part serves as the second mounting plate 132 for fixing the inductor sensor 22. This enhances the overall rigidity and stability of the second bracket 13, suppresses vibrations generated during equipment operation, and thus ensures the accuracy of the detection position and the consistency of the readings of the inductor sensor 22.

[0042] For example, the working principle of a device for detecting folding defects in the inner lining paper at the top of a cigarette pack:

[0043] During the initial debugging phase, the operator can loosen the first and second fasteners 18 and slide the first slider 14 and the second slider 15 within their respective arc-shaped grooves, causing the first bracket 12 and the second bracket 13 to move along an arc trajectory coaxial with the mold wheel. This ensures that the movement trajectory of the sensor bracket matches the circular motion of the mold wheel. Simultaneously, the final spatial orientation of the color mark sensor 21 and the inductive sensor 22 is fine-tuned until the light spot of the color mark sensor 21 accurately covers the preset area of ​​the aluminum foil on the top of the cigarette pack, and the probe of the inductive sensor 22 is directly facing and at the optimal detection distance from the exposed aluminum foil surface of the cigarette pack. After adjustment, tighten all fasteners.

[0044] When the cigarette pack intermittently moves to the designated detection station and pauses along with the mold wheel, the color mark sensor 21 mounted on the first bracket 12 first detects that the cigarette pack is in place, generating a high-level position trigger signal sent to the packaging machine control system, indicating that the valid detection window is open. Almost simultaneously, the inductive sensor 22, which is precisely aligned with the target, measures the distance to the aluminum foil on the top of the cigarette pack and outputs an electrical signal characterizing its position in real time. The control system collects the inductive signal within the validity period of the trigger signal and compares it with a preset threshold. If it exceeds the range, it is determined to be a folding defect. Subsequently, the system tracks the defective cigarette pack through an internal shift register, and when it reaches the downstream rejection station, it controls the rejection mechanism to reject it.

[0045] This application focuses on the installation position, collaborative working logic, and signal interaction relationship between the color mark sensor 21 and the inductor sensor 22 in the specific scenario of the FOCKE350 packaging machine mold wheel, aiming to solve the technical problem of achieving direct online detection in a compact space. The color mark sensor 21 and the inductor sensor 22 are mature components in the prior art, and their specific internal structures (such as optical components, coil winding methods, etc.) are not the inventive point of this application. Therefore, as long as the trigger signal generation and position signal detection functions described in this application can be achieved, those skilled in the art can select commercially available standard model sensors according to actual needs. The installation position and detection area of ​​the sensors have been clearly shown in this embodiment and the accompanying drawings, so their specific internal structures will not be described in detail.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for detecting folding defects in the inner lining paper of cigarette packs, applied to a FOCKE350 packaging machine with a die disc, characterized in that, include: The support unit (1) includes a slide rail (11) disposed on one side of the mold wheel disk in the circumferential direction, and a first bracket (12) and a second bracket (13) slidably mounted on the slide rail (11); the mounting end of the first bracket (12) extends above one of the pause positions of the mold wheel disk, and the mounting end of the second bracket (13) extends to the exposed end of the cigarette pack that is stopped at the same pause position; The signal acquisition unit (2) includes a color mark sensor (21) and an inductance sensor (22); the color mark sensor (21) is located at the mounting end of the first bracket (12) and is used to detect passing cigarette packs and generate a position trigger signal; the inductance sensor (22) is located at the mounting end of the second bracket (13) and is used to output an electrical signal characterizing the folding state of the inner lining paper. The signal output terminals of the color mark sensor (21) and the inductance sensor (22) are both connected to the control system of the packaging machine. The control system is used to determine whether the inner lining paper at the top of the cigarette pack has a folding defect based on the position trigger signal and the electrical signal.

2. The device for detecting folding defects in the inner lining paper of a cigarette pack according to claim 1, characterized in that, The slide rail (11) is an arc-shaped guide rail coaxial with the mold wheel disk; the top surface of the slide rail (11) is provided with a first slide groove (111) and a second slide groove (112) coaxial with it; a first slider (14) and a second slider (15) are respectively provided in the first slide groove (111) and the second slide groove (112); the first bracket (12) and the second bracket (13) are respectively fixedly installed on the first slider (14) and the second slider (15); after the position adjustment is completed, the first slider (14) and the second slider (15) are locked to the slide rail (11) by the first fastener (17) and the second fastener (18) respectively.

3. The device for detecting folding defects in the inner lining paper of a cigarette pack according to claim 2, characterized in that, The radius of the arc of the first slide groove (111) is greater than the radius of the arc of the second slide groove (112); the outer arc side of the slide rail (11) is provided with a first limiting groove (113) communicating with the first slide groove (111) along its extension direction, and the inner arc side of the slide rail (11) is provided with a second limiting groove (114) communicating with the second slide groove (112) along its extension direction. The extension paths of the first limiting groove (113) and the second limiting groove (114) are both coaxial with the slide rail (11).

4. The device for detecting folding defects in the inner lining paper of a cigarette pack according to claim 3, characterized in that, Both the first fastener (17) and the second fastener (18) are bolts; after the screw end of the first fastener (17) extends into the first limiting groove (113), the thread passes through the first slider (14), and its end abuts against the inner wall of the first slide groove (111) near the second slide groove (112); after the screw end of the second fastener (18) extends into the second limiting groove (114), the thread passes through the second slider (15), and its end abuts against the inner wall of the second slide groove (112) near the first slide groove (111).

5. The device for detecting folding defects in the inner lining paper of a cigarette pack according to claim 2, characterized in that, The first bracket (12) includes a vertical rod (121) erected on the first slider (14) and a horizontal rod (122) with one end vertically connected to the top of the vertical rod (121); the other end of the horizontal rod (122) extends above the pause station of the mold wheel and is connected to one end of a horizontally set first mounting plate (123), and the color mark sensor (21) is mounted on the first mounting plate (123).

6. The device for detecting folding defects in the inner lining paper of a cigarette pack according to claim 2, characterized in that, The second bracket (13) includes a horizontally arranged connecting plate (131), one end of which is fixedly mounted on the second slider (15), and the other end extends toward the exposed end of the cigarette pack that is stopped at the same pause position, and is vertically connected to the bottom end of a vertically arranged second mounting plate (132). The inductive sensor (22) is mounted on the second mounting plate (132).

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