Device and method for detecting stripping force of lap joint of filter stick paper for cigarettes

Abstract

The invention belongs to the technical field of cigarette filter stick detection equipment, and discloses a cigarette filter stick paper lap stripping force detection device and a detection method. The device for detecting the stripping force of the lap joint of the filter stick paper for the cigarettes comprises a stretching mechanism and an adsorption mechanism. The stretching mechanism comprises a tension detection assembly, a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece clamp the end of the first side face and the end of the second side face of the pre-stripped filter stick paper correspondingly, and the adsorption mechanism can adsorb the unstripped part of the filter stick paper and enable the unstripped part of the filter stick paper to extend in the second direction; the filter stick paper is always attached to the adsorption mechanism in the stripping process, the phenomenon that the unstripped part of the filter stick paper swings, warps or shakes is avoided, it is ensured that the stripping behavior of the filter stick paper is carried out along the lapping area, the filter stick paper in the non-lapping area is prevented from being accidentally torn, and the accuracy of the detection result is improved. The stripping force detection device for the lap joint of the filter stick paper for the cigarette can detect the firmness degree of the lap joint and also can detect the bonding uniformity of the lap joint.

Description

Technical Field

[0001] This invention relates to the technical field of cigarette filter rod testing equipment, and in particular to a device and method for testing the peel force of cigarette filter rod paper overlap. Background Technology

[0002] Cigarette filter rods are a crucial component of cigarette products, and their structural integrity directly impacts key physical indicators such as draw resistance and ventilation rate, as well as the final quality of the cigarette during rolling. During filter rod production, the forming paper is bonded together to form a tubular structure, and the bonding effect of this overlap is a key factor determining the structural stability of the filter rod. If the overlap bonding is weak or uneven, problems such as filter rod deformation, delamination, or even disintegration can easily occur during subsequent cigarette transport, cutting, and smoking, leading to product defects or affecting machine operating efficiency. Therefore, accurate and reliable testing of the forming paper overlap bonding quality is of paramount importance for process optimization and product quality control.

[0003] Currently, a tensile testing machine is commonly used to measure the peel force of the overlap of formed paper. The filter rod sample is cut open along the overlap at a certain distance and fixed on the tensile testing machine. The machine then gradually peels the filter rod sample along the adhesive interface, recording the mechanical parameters during the tensile process to evaluate the strength of the overlap. However, because the tensile force acts directly on the highly flexible formed paper, and the point of application is concentrated in the local area about to be peeled, the subsequent paper strip that has not yet been peeled experiences uneven and unstable stress during the peeling process. This stress distribution easily causes the paper strip to warp, sway, or shake upwards or downwards, making it impossible to maintain a stable and continuous peeling trajectory and stress state. This unstable peeling state interferes with the acquisition of real-time tensile data, resulting in drastic fluctuations in the measured force curve and reduced repeatability and reproducibility of the test results. Furthermore, swaying may cause stress concentration, preventing the peeling behavior from strictly following the adhesive interface. Sometimes, this can lead to accidental tearing of the paper matrix in non-overlap areas, thus distorting the test results and failing to accurately reflect the adhesive properties of the adhesive interface itself.

[0004] Furthermore, in actual production, the glue application at the filter rod joint may have localized defects, such as insufficient or complete glue application in a small section. Current detection methods typically only focus on the average peel force, making it difficult to effectively identify such localized defects in the calculation of the average value. However, this "weak link" is easily exposed due to stress during the high-speed cigarette rolling process, leading to quality problems such as "curling" or "reversal" of the forming paper, thus affecting the product qualification rate. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for detecting the peel force of cigarette filter paper overlap. The device can suppress problems such as wobbling and warping of the unpeeled portion of the filter paper during the test, improve the stability of the peel force measurement results, and avoid accidental tearing of the filter paper. The method can not only detect the firmness of the overlap, but also the uniformity of the overlap adhesion, thereby improving the pass rate of cigarette filter paper.

[0006] To achieve this objective, the present invention adopts the following technical solution: On the one hand, a device for detecting the peel force of cigarette filter paper overlap is provided, comprising: A stretching mechanism includes a tensile force detection component, a first clamping member, and a second clamping member. The first clamping member and the second clamping member are spaced apart along a first direction. The first clamping member and the second clamping member respectively clamp the ends of the first side and the second side of the filter rod paper after pre-peeling along the overlap. The first clamping member and the second clamping member can move away from each other to peel the filter rod paper. The tensile force detection component can detect the peeling force of the filter rod paper. An adsorption mechanism is provided on one side of the stretching mechanism along the second direction. The adsorption mechanism can adsorb the unpeeled portion of the filter paper and extend the unpeeled portion of the filter paper along the second direction. During the peeling process of the filter paper, the filter paper always adheres to the adsorption mechanism.

[0007] Optionally, the adsorption mechanism includes a baffle and a vacuum pump. The baffle is located at the center of the line connecting the first clamping member and the second clamping member and extends along the second direction. A negative pressure chamber is provided inside the baffle. An adsorption hole communicating with the negative pressure chamber is provided on the baffle. The vacuum pump is connected to the negative pressure chamber. The filter paper is attached to the baffle and blocks the adsorption hole.

[0008] Optionally, the adsorption mechanism further includes a pulley, which is disposed at one end of the baffle facing the stretching mechanism and rotatably connected to the baffle along the second direction, and the filter paper abuts against the pulley.

[0009] Optionally, the stretching mechanism further includes a first driving component, which is driven to connect to the first clamping member and is capable of driving the first clamping member to move along the first direction.

[0010] Optionally, the first clamping member moves in the same direction as the adsorption mechanism, and the moving speed of the first clamping member is twice the moving speed of the adsorption mechanism.

[0011] Optionally, the stretching mechanism further includes a second driving component, which is driven and connected to the adsorption mechanism, and the second driving component is capable of driving the adsorption mechanism to move along the first direction.

[0012] Optionally, the cigarette filter paper overlap peel force detection device further includes a base, and the stretching mechanism and the adsorption mechanism are both connected to the base.

[0013] On the other hand, a method for testing the peel force of cigarette filter paper overlap is provided, which uses the aforementioned cigarette filter paper overlap peel force testing device and specifically includes the following steps: S1: Pre-peel a certain length of filter paper from the overlap to form a first side and a second side, and have the first clamping member and the second clamping member respectively clamp the ends of the first side and the second side of the filter paper after pre-peeling. S2: Activate the adsorption mechanism to ensure that the unpeeled portion of the filter paper remains in contact with the adsorption mechanism. S3: Move the first clamping member and the second clamping member away from each other to completely peel off the filter rod paper; S4: During the process of completely peeling off the filter paper, record the peeling force data, and calculate the average value, minimum value and coefficient of variation of the peeling force based on the data.

[0014] Optionally, the negative pressure range of the adsorption mechanism is -0.01MPa to 0.05MPa.

[0015] Optionally, the evaluation method for the adhesion and uniformity of the cigarette filter paper overlap is as follows: if the average peel force is ≥20gf, the minimum peel force is ≥15gf, and the peel force variation coefficient is ≤0.3, then the 100mm overlap of the filter paper is firmly and uniformly bonded.

[0016] The beneficial effects of this invention are: This invention provides a device and method for detecting the peel force of cigarette filter paper overlap. The device for detecting the peel force of cigarette filter paper overlap includes a tensioning mechanism and an adsorption mechanism. The tensioning mechanism includes a tension detection component, a first clamping member, and a second clamping member. The first and second clamping members are spaced apart along a first direction and respectively clamp the ends of the first and second sides of the pre-peeled filter paper. The first and second clamping members can move away from each other to peel the filter paper. The tension detection component can detect the peel force of the filter paper. The adsorption mechanism is located on one side of the tensioning mechanism along a second direction. The adsorption mechanism can adsorb the unpeeled portion of the filter paper and extend the unpeeled portion along the second direction. During the peeling process, the filter paper remains in contact with the adsorption mechanism. Because the filter paper remains in contact with the adsorption mechanism during the peeling process, the unpeeled portion of the filter paper is prevented from swinging, warping, or shaking, ensuring that the filter paper maintains a stable and continuous peeling trajectory and stress state, thus improving the stability of the peel force measurement results. The peeled and unpeeled portions of the filter paper remain perpendicular, further improving the stability of peel force measurement results. The filter paper is also adsorbed by the adsorption mechanism, allowing it to move relative to the adsorption mechanism towards the stretching mechanism, facilitating smooth peeling. Simultaneously, the peeling process is ensured to occur along the overlap area, preventing accidental tearing of the filter paper in non-overlap areas that could distort test results and improve accuracy. Furthermore, the peel force measured by the tensile testing component can detect both the strength of the overlap and the uniformity of the adhesion, identifying any unbonded or poorly bonded areas, thus improving the pass rate of cigarette filter paper. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the cigarette filter paper overlap peel force detection device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0018] In the picture: 1. Stretching mechanism; 11. First clamping member; 12. Second clamping member; 13. First driving assembly; 14. Second driving assembly; 2. Adsorption mechanism; 21. Baffle; 211. Adsorption hole; 22. Pulley; 3. Base; 100. Filter paper; 101. First side; 102. Second side. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 and Figure 2As shown, this embodiment provides a device for detecting the peel force of cigarette filter paper overlap. The device includes a tensioning mechanism 1 and an adsorption mechanism 2. The tensioning mechanism 1 includes a tension detection component, a first clamping member 11, and a second clamping member 12. The first clamping member 11 and the second clamping member 12 are spaced apart along a first direction. The first clamping member 11 and the second clamping member 12 respectively clamp the end of the first side 101 and the end of the second side 102 of the pre-peeled filter paper 100. The first clamping member 11 and the second clamping member 12 can move away from each other to peel the filter paper 100. The tension detection component can detect the peel force of the filter paper 100. The adsorption mechanism 2 is disposed on one side of the tensioning mechanism 1 along a second direction. The adsorption mechanism 2 can adsorb the unpeeled portion of the filter paper 100 and extend the unpeeled portion of the filter paper 100 along the second direction. During the peeling process, the filter paper 100 remains attached to the adsorption mechanism 2. During the peeling process, the filter paper 100 remains in contact with the adsorption mechanism 2, preventing the unpeeled portion from swinging, warping, or shaking. This ensures the filter paper 100 maintains a stable and continuous peeling trajectory and stress state, improving the stability of the peeling force measurement results. The peeled and unpeeled portions of the filter paper 100 remain perpendicular, further enhancing the stability of the peeling force measurement results. Furthermore, the adsorption mechanism 2 allows the filter paper 100 to move relative to the adsorption mechanism 2 towards the stretching mechanism 1, facilitating smooth peeling. Simultaneously, the peeling action of the filter paper 100 is ensured to occur along the overlap area, preventing accidental tearing of the filter paper 100 in non-overlap areas and thus improving the accuracy of the test results. In addition, the peel force of the filter paper 100 detected by the tensile testing component can not only detect the firmness of the overlap, but also the uniformity of the overlap adhesion, and detect whether there are unbonded or poorly bonded areas in the overlap adhesion, thereby improving the pass rate of the cigarette filter paper 100.

[0024] Specifically, the first direction is Figure 1 The top and bottom directions, the second direction is Figure 1 The first direction is perpendicular to the second direction. In other embodiments, the first direction is left-right and the second direction is up-down, as long as the first direction is perpendicular to the second direction, it is not limited to this embodiment. The tension detection component can be a tension sensor or a tension gauge. The tension detection component is communicatively connected to a data processing computer, which can process the data detected by the tension detection component, facilitating observation and calculation by the operator. The first clamping member 11 and the second clamping member 12 are both mature technologies in the field, and will not be described in detail here.

[0025] Optionally, the adsorption mechanism 2 includes a baffle 21 and a vacuum pump. The baffle 21 is located at the center of the line connecting the first clamping member 11 and the second clamping member 12 and extends along the second direction to ensure that the stress on the first side 101 and the second side 102 is consistent during the peeling process. A negative pressure chamber is provided inside the baffle 21, and adsorption holes 211 communicating with the negative pressure chamber are provided on the baffle 21. The vacuum pump is connected to the negative pressure chamber, and the filter paper 100 is attached to the baffle 21 and the adsorption holes 211 are sealed. This arrangement facilitates the adsorption of the filter paper 100, resulting in a better adhesion between the filter paper 100 and the baffle 21, and improving the stability of the peeling force measurement results. Specifically, the baffle 21 is elongated, and the length of the baffle 21 is greater than or equal to the length of the filter paper 100, ensuring that the filter paper 100 is completely attached to the baffle 21. Multiple adsorption holes 211 are spaced apart along the second direction, and all adsorption holes 211 are connected to the negative pressure chamber. By setting multiple adsorption holes 211, the adsorption strength and adsorption area of ​​the baffle 21 on the filter paper 100 are increased, thereby improving the stability of adsorption; it can also ensure that the filter paper 100 is always in contact with the baffle 21 during the peeling process.

[0026] Optionally, the adsorption mechanism 2 further includes a pulley 22. Along the second direction, the pulley 22 is disposed at the end of the baffle 21 facing the stretching mechanism 1 and rotatably connected to the baffle 21, with the filter paper 100 abutting against the pulley 22. By providing the pulley 22, the sliding friction between the filter paper 100 and the end of the baffle 21 can be transformed into rolling friction, making the peeling process of the filter paper 100 smoother. Specifically, the adsorption mechanism 2 also includes a rotating shaft, which is connected to the baffle 21 and extends along a third direction, with the pulley 22 rotatably connected to the rotating shaft. The third direction is a direction perpendicular to both the first and second directions.

[0027] Optionally, the stretching mechanism 1 further includes a first drive assembly 13, which is drivenly connected to the first clamping member 11. The first drive assembly 13 can drive the first clamping member 11 to move along a first direction to peel off the filter paper 100. Specifically, the first drive assembly 13 can be a structure of a motor, a lead screw, and a lead screw nut; the first drive assembly 13 can also be a structure of a motor, a gear, and a rack. This embodiment does not limit this.

[0028] Furthermore, the first clamping member 11 moves in the same direction as the adsorption mechanism 2, and the moving speed of the first clamping member 11 is twice the moving speed of the adsorption mechanism 2. This arrangement ensures that the unpeeled portion of the filter paper 100 is always located at the center of the line connecting the first clamping member 11 and the second clamping member 12, and ensures that the first side 101 and the second side 102 always remain symmetrical.

[0029] Furthermore, the stretching mechanism 1 also includes a second driving component 14, which is driven and connected to the adsorption mechanism 2. The second driving component 14 can drive the adsorption mechanism 2 to move along a first direction so that the unpeeled portion of the filter paper 100 moves synchronously with the first side surface 101. Specifically, the second driving component 14 can be a structure of a motor, a lead screw, and a lead screw nut; the second driving component 14 can also be a structure of a motor, gears, and racks, which is not limited in this embodiment. In other embodiments, the second driving component 14 is driven and connected to the second clamping member 12, the adsorption mechanism 2 is fixed, and the first driving component 13 and the second driving component 14 respectively drive the first clamping member 11 and the second clamping member 12 to move in opposite directions at the same speed to peel off the filter paper 100. At the same time, it can also ensure that the first side surface 101 and the second side surface 102 always remain symmetrical.

[0030] Optionally, the cigarette filter paper overlap peel force detection device further includes a base 3, to which both the stretching mechanism 1 and the adsorption mechanism 2 are connected. The base 3 facilitates the fixing of the stretching mechanism 1 and the adsorption mechanism 2. Specifically, the second clamping member 12, the first driving assembly 13, and the second driving assembly 14 are all fixedly connected to the base 3.

[0031] This embodiment also provides a method for detecting the peel force of cigarette filter paper overlap, using the aforementioned cigarette filter paper overlap peel force detection device, specifically including the following steps: S1: The filter paper 100 is pre-peeled from the overlap by a certain length, so that the filter paper 100 forms a first side 101 and a second side 102, and the first clamping member 11 and the second clamping member 12 respectively clamp the ends of the first side 101 and the second side 102 of the filter paper 100 after pre-peeling. S2: Start the adsorption mechanism 2 so that the unpeeled part of the filter paper 100 always adheres to the adsorption mechanism 2; S3: Move the first clamping member 11 and the second clamping member 12 away from each other so as to completely peel off the filter rod paper 100; S4: During the process of completely peeling off the filter paper 100, record the peeling force data, and calculate the average, minimum and coefficient of variation of the peeling force based on the data.

[0032] This method for testing the peel force of the filter paper 100 at the seam avoids swaying, warping, or shaking of the unpeeled portion of the filter paper 100, ensuring a stable and continuous peeling trajectory and stress state, thus improving the stability of the peel force measurement results. Furthermore, by adsorbing the filter paper 100 through the adsorption mechanism 2, the filter paper 100 can move relative to the adsorption mechanism 2 towards the side closer to the stretching mechanism 1, allowing for smooth peeling. Simultaneously, it ensures that the peeling behavior of the filter paper 100 occurs along the seam area, preventing accidental tearing of the filter paper 100 in non-seam areas that could distort the test results, thereby improving the accuracy of the test results. In addition, this method for testing the peel force of the filter paper 100 at the seam can detect not only the strength of the seam but also the uniformity of the seam adhesion, identifying any unbonded or poorly bonded areas, thus improving the pass rate of cigarette filter paper 100.

[0033] Specifically, before step S1, the filter rod is placed in a constant temperature and humidity environment for 24 hours. The temperature is 22°C, the humidity is 60% RH, and the standing time is 24 hours. Then, the filter rod paper 100 is peeled away from the filter rod body along the opposite direction of the overlap. In step S1, the pre-peeled length of the filter rod paper 100 from the overlap ranges from 15-25 mm. In step S3, the first clamping member 11 and the adsorption mechanism 2 move synchronously. The moving speed of the first clamping member 11 is 40 mm / min, and the moving speed of the adsorption mechanism 2 is 20 mm / min. The moving distance of the first clamping member 11 is 80 mm.

[0034] Optionally, the negative pressure range of the adsorption mechanism 2 is -0.01 MPa to 0.05 MPa. Within this negative pressure range, it can be ensured that the adsorption mechanism 2 can firmly adsorb the filter paper 100, preventing the filter paper 100 from falling off, and also ensuring that the filter paper 100 can move in the second direction during the peeling process. In this embodiment, the negative pressure of the adsorption mechanism 2 is set to -0.03 MPa.

[0035] Optionally, the evaluation method for the adhesion and uniformity of the cigarette filter paper overlap is as follows: when the average peel force is ≥20gf, the minimum peel force is ≥15gf, and the peel force variation coefficient is ≤0.3, the 100 overlap of the filter paper is firmly and uniformly bonded.

[0036] 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 can make other variations or modifications based on the above description. 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 device for detecting the peel force of cigarette filter paper overlap, characterized in that, include: The stretching mechanism (1) includes a tension detection component, a first clamping member (11) and a second clamping member (12). The first clamping member (11) and the second clamping member (12) are spaced apart along a first direction. The first clamping member (11) and the second clamping member (12) respectively clamp the end of the first side (101) and the end of the second side (102) of the filter rod paper (100) after pre-peeling along the overlap. The first clamping member (11) and the second clamping member (12) can move away from each other to peel the filter rod paper (100). The tension detection component can detect the peeling force of the filter rod paper (100). Adsorption mechanism (2) is disposed on one side of the stretching mechanism (1) along the second direction. The adsorption mechanism (2) can adsorb the unpeeled portion of the filter rod paper (100) and make the unpeeled portion of the filter rod paper (100) extend along the second direction. During the peeling process of the filter rod paper (100), the filter rod paper (100) always adheres to the adsorption mechanism (2).

2. The cigarette filter paper overlap peel force detection device according to claim 1, characterized in that, The adsorption mechanism (2) includes a baffle (21) and a vacuum pump. The baffle (21) is located at the center of the line connecting the first clamping member (11) and the second clamping member (12) and extends along the second direction. A negative pressure chamber is provided inside the baffle (21). An adsorption hole (211) communicating with the negative pressure chamber is provided on the baffle (21). The vacuum pump is connected to the negative pressure chamber. The filter paper (100) is attached to the baffle (21) and blocks the adsorption hole (211).

3. The cigarette filter paper overlap peel force detection device according to claim 2, characterized in that, The adsorption mechanism (2) further includes a pulley (22). Along the second direction, the pulley (22) is disposed at one end of the baffle (21) facing the stretching mechanism (1) and is rotatably connected to the baffle (21). The filter paper (100) abuts against the pulley (22).

4. The cigarette filter paper overlap peel force detection device according to claim 1, characterized in that, The stretching mechanism (1) further includes a first drive component (13), which is driven to be connected to the first clamping member (11) and is capable of driving the first clamping member (11) to move along the first direction.

5. The cigarette filter paper overlap peel force detection device according to claim 4, characterized in that, The first clamping member (11) moves in the same direction as the adsorption mechanism (2), and the moving speed of the first clamping member (11) is twice the moving speed of the adsorption mechanism (2).

6. The cigarette filter paper overlap peel force detection device according to claim 5, characterized in that, The stretching mechanism (1) further includes a second driving component (14), which is connected to the adsorption mechanism (2) and can drive the adsorption mechanism (2) to move along the first direction.

7. The cigarette filter paper overlap peel force detection device according to any one of claims 1-6, characterized in that, The cigarette filter paper overlap peel force detection device also includes a base (3), and the stretching mechanism (1) and the adsorption mechanism (2) are both connected to the base (3).

8. A method for testing the peel strength of the overlap of filter paper for cigarettes, characterized in that, The detection is performed using the cigarette filter paper overlap peel force testing device as described in any one of claims 1-7, specifically including the following steps: S1: Peel a certain length of filter paper (100) from the overlap to form a first side (101) and a second side (102) of the filter paper (100), and make the first clamping member (11) and the second clamping member (12) clamp the ends of the first side (101) and the second side (102) of the filter paper (100) after pre-peeling, respectively; S2: Activate the adsorption mechanism (2) so that the unpeeled portion of the filter paper (100) remains attached to the adsorption mechanism (2). S3: Move the first clamping member (11) and the second clamping member (12) away from each other to completely peel off the filter rod paper (100); S4: During the process of completely peeling off the filter paper (100), record the peeling force data, and calculate the average value, minimum value and coefficient of variation of the peeling force based on the data.

9. The method for detecting the peel force of the overlap of cigarette filter paper according to claim 8, characterized in that, The negative pressure range of the adsorption mechanism (2) is -0.01MPa to 0.05MPa.

10. The method for detecting the peel force of the overlap of cigarette filter paper according to claim 8, characterized in that, The evaluation method for the adhesion and uniformity of the cigarette filter paper overlap is as follows: if the average peel force is ≥20gf, the minimum peel force is ≥15gf, and the coefficient of variation of peel force is ≤0.3, then the 100mm overlap of the filter paper is firmly and uniformly bonded.

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