A quality inspection device and method for white cardboard production

Abstract

The present application discloses a quality inspection device and method for white cardboard production, relating to the technical field of white cardboard production equipment, comprising a workbench, a driving wedge, a pressure supply mechanism, a second pressure gauge, and a control unit. The driving wedge is located above the workbench and can be raised and lowered vertically. A stripping wedge is vertically slidably connected to the bottom tip of the driving wedge. In the initial state, the bottom tip of the stripping wedge is used to contact the adhesive portion of the cigarette box. A contact switch is provided at the top position of the driving wedge corresponding to the stripping wedge. The pressure supply mechanism is used to apply vertical downward pressure to the driving wedge. A first pressure gauge is provided between the driving wedge and the pressure supply mechanism. A second pressure gauge is provided on the side of the stripping wedge away from the cigarette box. The second pressure gauge is used to detect the horizontal force applied by the stripping portion of the cigarette box. When the stripping wedge is disengaged from the contact switch, the first pressure gauge locks the current pressure value. The present application has the effect of improving the accuracy of quality inspection of white cardboard production.

Description

Technical Field

[0001] The present application relates to the technical field of white cardboard production equipment, and in particular to a quality inspection device and inspection method for white cardboard production. Background Art

[0002] The outer packaging of rigid cigarette boxes is typically made of white cardboard, as it offers excellent stiffness and printing quality, allowing for the perfect display of exquisite designs and text on the boxes. Furthermore, the cardboard's hardness and thickness make the boxes more durable, protecting cigarettes from environmental influences. To assess the quality of finished white cardboard during production, in addition to conventional testing methods, samples of the finished white cardboard can be made into cigarette box samples. Testing the sample boxes indirectly reflects the quality of the white cardboard production.

[0003] In the related art, a Chinese patent document with the authorization announcement number CN210982184U discloses a device for testing the adhesive strength of a soft-pack hardened cigarette box, comprising a contact portion that provides a lateral opening force at the adhesive portion of the cigarette box and a pressure device that provides pressure to the contact portion, wherein the contact portion comprises a connecting portion and a contact end portion having an inclined structure, and further comprises a limiting groove for fixing the position of the cigarette box. During the test, the cigarette box is first fixed in the limiting groove, and the bottom end of the contact portion is aligned with the adhesive portion of the side of the cigarette box and pressed down. The pressure device gradually applies pressure to the adhesive portion of the cigarette box through the contact portion until the adhesive portion of the cigarette box is opened. A part of the cigarette box at the adhesive portion tilts to the left and opens, which is recorded here as the peeling portion, that is, the peeling portion of the cigarette box is separated from the cigarette box body. The pressure applied by the pressure device at this time is recorded and defined as the adhesive strength of the cigarette box.

[0004] Whether the peeling part of the cigarette box is separated from the cigarette box body depends entirely on human observation, and the human eye cannot accurately observe the moment of separation. It is often necessary for the peeling part of the cigarette box to be separated to a certain extent before it can be observed. At this time, the pressure value recorded cannot accurately reflect the actual bonding strength of the cigarette box, and there is a large error, which affects the final white cardboard production quality inspection results. Summary of the Invention

[0005] In order to improve the situation where existing detection devices have large errors when detecting the adhesive strength of cigarette boxes, which affects the quality detection results of white cardboard production, the present application provides a quality detection device and detection method for white cardboard production.

[0006] On the one hand, the present application provides a quality inspection device for white cardboard production, which adopts the following technical solution:

[0007] A quality inspection device for white cardboard production, comprising

[0008] a workbench for placing cigarette boxes;

[0009] A driving wedge is located above the workbench and can be raised and lowered vertically. The bottom tip of the driving wedge is vertically slidably connected to a stripping wedge. In an initial state, the bottom tip of the stripping wedge is used to contact the adhesive portion of the cigarette case. A contact switch is provided at a position of the driving wedge corresponding to the top of the stripping wedge. A first return member is provided between the driving wedge and the stripping wedge.

[0010] a pressure supply mechanism for applying vertical downward pressure to the driving wedge, wherein a first pressure gauge is provided between the driving wedge and the pressure supply mechanism, and the first pressure gauge is capable of recording and displaying the pressure value applied by the pressure supply mechanism to the driving wedge;

[0011] a second pressure gauge, arranged on a side of the peeling wedge away from the cigarette box, the second pressure gauge being used to detect the horizontal force applied by the peeling portion of the cigarette box;

[0012] The control unit is electrically connected to the contact switch, and the control unit is electrically connected to the first pressure gauge. When the stripping wedge is disengaged from the contact switch, the first pressure gauge locks the current pressure value.

[0013] Optionally, a transmitting module is provided on the workbench on one side of the driving wedge for emitting horizontal laser light. The setting height of the transmitting module is lower than the height of the bottom tip of the stripping wedge in the initial state, and the transmitting module emits laser light toward the stripping wedge. A receiving module is fixed on the side of the stripping wedge away from the transmitting module. Both the transmitting module and the receiving module are electrically connected to the control unit. When the receiving module and the transmitting module are at the same height, the receiving module receives the laser signal from the transmitting module, and the pressure supply mechanism stops applying pressure.

[0014] Optionally, a signal optical fiber is passed through the stripping wedge, one end of the signal optical fiber is horizontally facing one side of the transmitting module, the other end of the signal optical fiber is at the same height as the receiving module and faces the receiving module, and the end of the signal optical fiber facing the transmitting module is movably connected to the stripping wedge.

[0015] Optionally, the second pressure gauge is placed horizontally, and the second pressure gauge includes a pressure probe facing the direction of the peeling wedge. The setting height of the pressure probe is lower than the height of the bottom tip of the peeling wedge in the initial state. The pressure probe is used to be placed close to the peeling part of the cigarette box to detect the force applied in the horizontal direction when the peeling part is separated.

[0016] Optionally, the stripping wedge includes a stripping bevel, which is arranged on a side of the stripping wedge close to the second pressure gauge, and the distance between the stripping bevel and the pressure probe gradually increases from top to bottom.

[0017] Optionally, a separation block is slidably connected inside the stripping wedge, and the separation block can slide out of the stripping wedge from the stripping slope. A suction component is provided inside the stripping wedge for controlling the separation block to extend or retract into the stripping wedge.

[0018] Optionally, the suction component includes a first suction member, a second suction member and a second return member, the first suction member is fixed in the stripping wedge and electrically connected to the control unit, the second suction member is fixed to the separation block, the first suction member and the second suction member correspond in position, one end of the second return member is connected to the stripping wedge, and the other end is connected to the separation block, the first suction member can be connected to an external power supply, and the first suction member is adsorbed together with the second suction member after being energized.

[0019] Optionally, the peeling wedge is provided with an anti-stick coating on the peeling inclined surface and the side wall surface away from the peeling inclined surface.

[0020] On the other hand, the present application provides a method for quality inspection of white cardboard production, which uses the above-mentioned quality inspection device for white cardboard production to inspect the production quality of white cardboard, including the following steps:

[0021] S1: Place the cigarette box to be tested on the workbench and fix it in position, align the bottom tip of the stripping wedge with the bonding part of the cigarette box, start the pressure supply mechanism, and the pressure supply mechanism applies downward pressure to the stripping wedge, and gradually increases the applied pressure. The first pressure gauge continuously detects the pressure value applied downward by the pressure supply mechanism. At the moment the bonding part of the cigarette box is separated, the first return member pushes the stripping wedge downward into the gap where the bonding part is separated, separating the bonding part of the cigarette box into a stripping part. At this time, the stripping wedge is disengaged from the contact switch, and the control unit sends a signal to the first pressure gauge. The first pressure gauge locks its currently detected pressure value and displays it externally. The laser emitted by the transmitting module is transmitted to the receiving module via the signal optical fiber. The receiving module sends a laser signal to the control unit. The control unit sends a signal to the pressure supply mechanism to stop applying pressure. Since the stripping wedge pushes the stripping part away from the cigarette box body, the stripping part contacts the second pressure gauge. The second pressure gauge detects the horizontal force applied by the stripping part, and the second pressure gauge sends a pressure signal to the control unit.

[0022] S2: The pressure value displayed by the first pressure gauge is defined as the adhesive strength of the cigarette box to be tested. If the adhesive strength is less than 28N, the cigarette box is judged to be unqualified. For cigarette box samples with unqualified adhesive strength, white cardboard produced in the same batch as the unqualified cigarette box samples is re-selected for quality inspection to determine whether the quality problem is common;

[0023] S3: During the test, the control unit must receive the laser signal and the pressure signal at the same time, and the test result will be considered valid. Otherwise, readjust and continue the test.

[0024] In summary, this application has at least one of the following beneficial effects:

[0025] 1. During the test, the stripping wedge is first moved to the bonding position of the corresponding cigarette box and stopped. In the initial state, the bottom tip of the stripping wedge contacts the bonding surface of the cigarette box, and then the pressure supply mechanism gradually applies pressure to the stripping wedge. During the pressure application process, since the stripping wedge is slidably connected to the driving wedge, the stripping wedge first abuts against the cigarette box and remains stationary, while the driving wedge gradually descends in height until the driving wedge descends to the point where the contact switch inside it abuts against the stripping wedge. At this time, the first return member is deformed under pressure, the first pressure gauge begins to detect the real-time pressure value, and the driving wedge begins to press down the bonding part of the cigarette box together with the stripping wedge. At the moment when the peeling part is separated from the bonding part of the cigarette box, the stripping wedge is pressed by the first return member. The restoring force generated by the restoring member pushes it downward and instantly inserts it into the gap at the bonding point. At this time, the top of the peeling wedge separates from the contact switch, and the control unit sends a locking signal to the first pressure gauge. The first pressure gauge locks the pressure value detected by itself at the moment of separation and displays it externally. Since the peeling wedge is inserted into the gap at the moment of separation at the bonding point, compared with direct observation by the human eye, the peeling wedge moves more quickly and can more accurately reflect the moment of separation. The pressure value data finally obtained by the first pressure gauge more accurately reflects the pressure value at the moment of separation at the bonding point, thereby greatly improving the accuracy of the bonding strength test of the cigarette box samples, and further improving the accuracy of the corresponding white cardboard quality test results;

[0026] 2. By adopting dual detection of laser signals and pressure signals, the laser signal is emitted by the transmitting module to the signal optical fiber that moves with the stripping wedge. After the signal optical fiber follows the stripping wedge and is inserted into the gap, it is at the same horizontal height as the transmitting module. The laser is transmitted along the signal optical fiber to the receiving module. The receiving module sends the laser signal to the control unit, and the pressure signal is detected by the second pressure gauge. As the stripping part separates from the cigarette box body, the stripping part will spread away from the cigarette box body at the moment of separation. Therefore, the stripping part will exert a horizontal force on the second pressure gauge. If the second pressure gauge detects this force, it will send a pressure signal to the control unit. If the control unit detects both the laser signal and the pressure signal, the reading displayed by the first pressure gauge is valid. Because if the control unit only receives the laser signal but the second pressure gauge does not detect the pressure signal, it may be because the stripping wedge is not pressing down on the bonding point. If the control unit does not receive the laser signal but the second pressure gauge detects a pressure signal, it may be because the position of the cigarette box shifted during the downward pressure process. In both cases, the detected pressure values ​​are invalid.

[0027] 3. A pop-up separation block is provided in the stripping wedge. When the stripping wedge is inserted into the gap at the bonding part, the first suction part is de-energized. At this time, the second suction part is pushed away from the first suction part by the second return part, and the separation block is instantly popped out of the stripping wedge from the stripping slope. The pop-up separation block applies a force on the already separated stripping part away from the cigarette box body, so that the stripping part is further spread outward. The further spread outward stripping part can apply a greater and more obvious pressure to the second pressure gauge, making the second pressure gauge easier to detect, thereby improving the detection sensitivity of the pressure signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram showing the overall structure of the detection device in Example 1 of the present application;

[0029] Figure 2 This is a partial schematic diagram showing the driving wedge in Example 1 of the present application;

[0030] Figure 3 is a partial cross-sectional schematic diagram showing a peeling wedge in Example 1 of the present application;

[0031] Figure 4 This is a schematic diagram showing the structure of the transmitting module and the receiving module in Example 1 of the present application;

[0032] Figure 5 This is a cross-sectional schematic diagram illustrating the working principle of a signal optical fiber according to Example 1 of the present application;

[0033] Figure 6 It is a partial cross-sectional schematic diagram showing the separation block structure of Example 1 of the present application.

[0034] Explanation of the accompanying drawings: 1. Workbench; 11. Support frame; 12. Support leg; 13. Screw rod; 14. Limit block; 15. Transmitter module; 2. Driving wedge; 21. Guide groove; 22. First return member; 23. Contact switch; 3. Pressure supply mechanism; 31. Fixed seat; 32. Pressure cylinder; 33. First pressure gauge; 4. Cigarette box; 41. Filling block; 42. Adhesion; 43. Peeling part; 5. Peeling wedge; 51. Peeling slope; 52. Guide block; 53. Receiving module; 54. Slide groove; 55. Separation block; 56. First suction member; 57. Second suction member; 58. Second return member; 6. Second pressure gauge; 7. Signal optical fiber. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail. Example 1

[0036] Example 1 of the present application discloses a quality inspection device for white cardboard production, referring to Figure 1 and Figure 2The quality inspection device for white cardboard production includes a workbench 1, a support frame 11, and a driving wedge 2. The workbench 1 is placed horizontally and is used to place cigarette boxes 4. Four vertical legs 12 are fixed to the bottom of the workbench 1. The workbench 1 is stably placed on the ground or other workbench surfaces by the legs 12. The support frame 11 is vertically fixed to the top surface of the workbench 1. There are two support frames 11, which are spaced apart. A horizontal screw rod 13 is provided between the support frames 11. The two ends of the screw rod 13 are rotatably connected to the top positions of the two support frames 11 through bearings. A pressure supply mechanism 3 is provided on the screw rod 13. The driving wedge 2 is provided at the bottom of the pressure supply mechanism 3 and moves on the screw rod 13 following the pressure supply mechanism 3.

[0037] Specifically, the pressure supply mechanism 3 includes a fixed seat 31 and a pressure cylinder 32, wherein the pressure cylinder 32 is placed vertically with its output shaft pointing vertically downward. The screw 13 is passed through and threadedly connected to the fixed seat 31. A drive motor is fixed to one end of the screw 13 on the side wall of one of the support frames 11. The output shaft of the drive motor is coaxially fixed to one end of the screw 13. The output shaft of the drive motor drives the screw 13 to rotate, thereby driving the fixed seat 31 to move horizontally back and forth along the length of the screw 13, ultimately driving the pressure cylinder 32 to move back and forth in the horizontal direction. The driving wedge 2 is arranged at the bottom of the pressure cylinder 32, so that the driving wedge 2 can move back and forth with the pressure cylinder 32, thereby facilitating the position of the driving wedge 2. A first pressure gauge 33 is fixed between the driving wedge 2 and the output shaft of the pressure cylinder 32. The first pressure gauge 33 includes a pressure sensor and a display screen. The first pressure gauge 33 can detect the pressure value applied by the pressure cylinder 32 to the driving wedge 2 in real time and display the corresponding pressure value on the display screen. In the first embodiment of the present application, the pressure cylinder 32 may be a small electric cylinder or a hydraulic cylinder, as long as it can stably drive the driving wedge block 2 to move up and down in the vertical direction.

[0038] The top surface of the workbench 1 is provided with a horizontally placed limit block 14 and a transmitting module 15 for emitting laser light. A vertical rod is fixed to the top surface of the workbench 1 at the position corresponding to the limit block 14. The vertical rod is inserted into the limit block 14, and the limit block 14 can slide up and down along the vertical rod. The limit block 14 is also provided with a horizontal locking screw, which is threadedly connected to the limit block 14. One end of the locking screw can abut against the side wall of the vertical rod after being rotated, thereby locking the height position of the limit block 14. The transmitting module 15 is located on one side of the limit block 14 and is arranged close to the limit block 14. The bottom of the transmitting module 15 is fixed in position by a vertical rod vertically inserted into the workbench 1. The vertical rod corresponding to the transmitting module 15 can be raised and lowered to adjust the position of the transmitting module 15. The method of locking the transmitting module 15 is the same as the method of locking the limit block 14, which will not be repeated here.

[0039] The sample of the cigarette box 4 to be tested is placed under the limit block 14. A filling block 41 that matches the internal space of the cigarette box 4 is inserted into the cigarette box 4. The top surface of the filling block 41 is a magnetic block, and the limit block 14 is made of iron material. When it is necessary to fix the position of the cigarette box 4, the filling block 41 of the appropriate size is first inserted into the cigarette box 4. Then, the cigarette box 4 and the filling block 41 are placed together at the appropriate position at the bottom of the limit block 14. It should be noted that when the cigarette box 4 is placed, the adhesive portion 42 of the cigarette box 4 cannot be blocked by the limit block 14. The adhesive portion 42 is exposed outside the limit block 14, and the exposed area should not be too much. Then, the limit block 14 is lowered until it slightly touches the surface of the cigarette box 4. Finally, the position of the limit block 14 is locked by the locking screw. At this time, the filling block 41 and the limit block 14 are attracted together to clamp the cigarette box 4 together.

[0040] Reference Figure 2 and Figure 3 The bottom tip of the driving wedge 2 is vertically slidably connected to a stripping wedge 5. The stripping wedge 5 is positioned on the side of the adhesive 42 near the cigarette box 4. The stripping wedge 5 includes a stripping bevel 51, which is located on the side of the stripping wedge 5 away from the cigarette box 4. The side of the stripping wedge 5 near the cigarette box 4 is a vertical surface. A second pressure gauge 6 is also fixed to the workbench 1. The second pressure gauge 6 is located on the side of the stripping wedge 5 away from the cigarette box 4. The second pressure gauge 6 also includes a horizontal pressure probe facing the cigarette box 4. The distance between the stripping bevel 51 and the pressure probe gradually increases from top to bottom. The driving wedge 2 also includes a bevel, and the bevel of the driving wedge 2 and the stripping bevel 51 of the stripping wedge 5 are located on the same side. When the adhesive strength of the adhesive 42 needs to be tested, the stripping wedge 5 is first adjusted until the bottom tip is aligned with the adhesive 42. Then, the pressure cylinder 32 drives the driving wedge 2 and the stripping wedge 5 to descend together until the cigarette box 4 is separated to the left, thus separating the stripping portion 43. In the initial state, the bottom tip of the peeling wedge 5 contacts the adhesive portion 42 of the cigarette box 4 .

[0041] Furthermore, in the initial state, the stripping wedge 5 is in a drooping state, and the top of the stripping wedge 5 does not contact the driving wedge 2. The top of the stripping wedge 5 is separated from the driving wedge 2. A vertical guide block 52 is fixed to the top of the stripping wedge 5. A vertical guide groove 21 is provided inside the driving wedge 2 at a position corresponding to the guide block 52. The guide block 52 is slidably connected within the guide groove 21. First return members 22 are provided on both sides of the guide block 52. The first return members 22 can be compression springs. The top end of the first return member 22 is fixed to the inner wall of the driving wedge 2, and the bottom end is fixed to the stripping wedge 5, thereby connecting the stripping wedge 5 and the driving wedge 2 together. A contact switch 23 is fixed to the inner top wall of the driving wedge 2 corresponding to the guide groove 21. The guide block 52 triggers the contact switch 23 during its upward movement.

[0042] The detection device further includes an external control unit (not shown). The contact switch 23 is electrically connected to the control unit, and the control unit is electrically connected to both the first pressure gauge 33 and the second pressure gauge 6 .

[0043] During testing, the stripping wedge 5 is first moved to the position corresponding to the adhesive portion 42 of the cigarette case 4 and stopped. Initially, the bottom tip of the stripping wedge 5 contacts the surface of the adhesive portion 42 of the cigarette case 4. Then, the pressure cylinder 32 drives the driving wedge 2 to gradually descend. During the pressure application process, because the stripping wedge 5 and the driving wedge 2 are slidingly connected and initially non-contacting, the stripping wedge 5 first abuts against the cigarette case 4 and remains stationary, while the driving wedge 2 gradually descends. Until the driving wedge 2 descends to the point where its internal contact switch 23 abuts the guide block 52, the first pressure gauge 33 begins to detect the real-time pressure value. At this time, the first return member 22 is compressed and deformed, generating a restoring force. However, because the driving wedge 2 and the stripping wedge 5 are integrated and descend synchronously, the first pressure gauge 33 still only detects the pressure applied by the pressure cylinder 32 on the driving wedge 2. The driving wedge 2 begins to press down on the adhesive portion 42 of the cigarette box 4 together with the stripping wedge 5. At the moment when the adhesive portion 42 of the cigarette box 4 separates to form the stripping portion 43, the stripping wedge 5 is pushed downward by the restoring force generated by the first restoring member 22 and instantly inserted into the gap separated by the adhesive portion 42. At this time, the top of the stripping wedge 5 separates from the contact switch 23, and the contact switch 23 sends a separation signal to the control unit. At this time, the control unit sends a lock signal to the first pressure gauge 33, and the first pressure gauge 33 locks the pressure value detected at the moment of separation and displays it externally via the display screen. Because the stripping wedge 5 is inserted into the gap at the moment of separation of the adhesive portion 42, compared to direct observation by the human eye, the stripping wedge 5 moves more quickly and can more accurately reflect the moment of separation. The pressure value data ultimately obtained by the first pressure gauge 33 more accurately reflects the pressure value at the moment of separation of the adhesive portion 42, thereby greatly improving the accuracy of the adhesive strength test of the cigarette box 4 sample, and indirectly improving the accuracy of the white cardboard quality test results.

[0044] To further improve the accuracy of the test, refer to Figures 3 to 5 Transmitter module 15 is capable of emitting horizontal laser light. Before testing begins, the vertical height of transmitter module 15 is lower than the initial height of the bottom tip of peeling wedge 5, and transmitter module 15 emits laser light toward peeling wedge 5. The specific height of transmitter module 15 can be adjusted based on actual conditions, as long as it is slightly lower than the initial height of the bottom tip of peeling wedge 5. A receiving module 53 is fixed to the side of peeling wedge 5 away from transmitter module 15. Both transmitter module 15 and receiver module 53 are electrically connected to a control unit, and receiver module 53 is capable of receiving laser signals emitted by transmitter module 15.

[0045] A signal optical fiber 7 is inserted into the stripping wedge 5. One end of the signal optical fiber 7 is horizontally oriented toward the transmitting module 15, while the other end of the signal optical fiber 7 is aligned at the same height as and faces the receiving module 53. The end of the signal optical fiber 7 facing the transmitting module 15 is movably connected to the stripping wedge 5. Specifically, the stripping wedge 5 has a vertical slot 54 corresponding to the end of the signal optical fiber 7 near the transmitting module 15. This allows the height of the end of the signal optical fiber 7 near the transmitting module 15 to be adjusted according to actual conditions, thereby better matching the height of the transmitting module 15. During the process of inserting the stripping wedge 5 into the gap at the adhesive joint 42, when the stripping wedge 5 drives the signal optical fiber 7 down until its end is at the same height as the transmitting module 15, laser light emitted by the transmitting module 15 is transmitted along the signal optical fiber 7 to the receiving module 53. After receiving the laser signal, the receiving module 53 sends a laser signal to the control unit, which then sends a stop pressure signal to the pressure cylinder 32, causing the pressure cylinder 32 to stop applying pressure to the driving wedge 2.

[0046] As the peeling portion 43 separates from the cigarette case 4, it expands away from the cigarette case 4 at the moment of separation. This forces the peeling portion 43 to exert a horizontal force on the pressure probe of the second pressure gauge 6. If the second pressure gauge 6 detects this force, it sends a pressure signal to the control unit. If the control unit detects both the laser signal and the pressure signal, the reading displayed by the first pressure gauge 33 is valid. If the control unit only receives the laser signal but the second pressure gauge 6 does not detect a pressure signal, this may be because the peeling wedge 5 did not press down on the adhesive 42. If the control unit does not receive the laser signal but the second pressure gauge 6 detects a pressure signal, this may be because the cigarette case 4 shifted during the downward pressure process. In either case, the pressure values ​​detected are invalid and require retesting.

[0047] To further improve the accuracy of the test, refer to Figure 6, a separation block 55 is slidably connected inside the stripping wedge 5, and the sliding direction of the separation block 55 is perpendicular to the stripping inclined surface 51, and it can slide out of the stripping wedge 5 from the stripping inclined surface 51, and the side of the separation block 55 close to the stripping inclined surface 51 is an arc surface. A first suction member 56, a second suction member 57 and a second return member 58 are provided in the stripping wedge 5, wherein the first suction member 56 is an electromagnet, the first suction member 56 is fixed in the stripping wedge 5, and is electrically connected to the control unit. The second suction member 57 is made of iron material, and the second suction member 57 is fixed to the end of the separation block 55 away from the stripping inclined surface 51, and the first suction member 56 and the second suction member 57 correspond in position. The second return member 58 can be a compression spring, one end of the second return member 58 is fixed to the inner wall of the stripping wedge 5, and the other end is fixed to the separation block 55. The first attraction member 56 can be connected to an external power supply, and when energized, the first attraction member 56 generates magnetism and is attracted to the second attraction member 57 , and the second restoring member 58 is compressed.

[0048] When the stripping wedge 5 is inserted into the gap at the adhesive portion 42, the contact switch 23 sends a separation signal to the control unit, which in turn sends a power-off command to the first engaging member 56. At this point, the first engaging member 56 is de-energized and loses its magnetism. At this point, the second engaging member 57 is pushed away from the first engaging member 56 by the restoring force generated by the deformation of the second restoring member 58, instantly ejecting the separation block 55 from the stripping slope 51 out of the stripping wedge 5. The ejected separation block 55 exerts a force on the already separated stripping portion 43 away from the cigarette box 4 body, causing the stripping portion 43 to further spread outward. The further spread outward stripping portion 43 can exert a greater and more significant pressure on the second pressure gauge 6, making it easier for the second pressure gauge 6 to detect, thereby improving the detection sensitivity of the pressure signal. At the same time, when the separation gap is opened wider, it is also easier for the stripping wedge 5 to be inserted into the gap, and it helps to separate the residual glue in the gap, making it easier for the stripping wedge 5 to fall.

[0049] In order to prevent the peeling wedge 5 from adhering to the residual glue at the bonding point 42, the peeling inclined surface 51 of the peeling wedge 5 and the side wall surface away from the peeling inclined surface 51 are coated with an anti-stick coating. The anti-stick coating can be made of polytetrafluoroethylene or fluorocarbon coating, which can effectively prevent the surface of the peeling wedge 5 from adhering to the residual glue.

[0050] The implementation principle of a quality inspection device for white cardboard production in Example 1 of the present application is as follows: at the moment when the peeling part 43 is separated from the bonding part 42 of the cigarette box 4, the peeling wedge 5 is pushed by the restoring force generated by the first restoring member 22, and is instantly inserted downward into the gap separated by the bonding part 42. At this time, the top of the peeling wedge 5 is separated from the contact switch 23, and the contact switch 23 sends a separation signal to the control unit. At this time, the control unit sends a locking signal to the first pressure gauge 33, and the first pressure gauge 33 locks the pressure value detected by itself at the moment of separation and displays it outward through the display screen, which can more accurately reflect the pressure value at the moment of separation of the bonding part 42. At the same time, a dual feedback mechanism of pressure signal and laser signal is adopted. If both feedbacks are obtained, the detection result is valid. If only one of the feedbacks is obtained, the detection result is invalid, which further improves the accuracy of the detection of the cigarette box 4 sample to be detected, so that the accuracy of the quality inspection result of the final white cardboard product is improved. Example 2

[0051] Example 2 of the present application discloses a method for quality inspection of white cardboard production, which uses the quality inspection device for white cardboard production as in Example 1 to inspect the final production quality of white cardboard, including the following steps:

[0052] S1: Place the cigarette box 4 to be tested on the workbench 1 and fix it in position, align the bottom tip of the stripping wedge 5 with the adhesive portion 42 of the cigarette box 4, start the pressure cylinder 32, and the pressure cylinder 32 drives the wedge 2 to apply downward pressure to the stripping wedge 5, and gradually increases the applied pressure. The first pressure gauge 33 continuously detects the downward pressure value applied by the pressure supply mechanism 3. At the moment when the adhesive portion 42 of the cigarette box 4 is separated, the first return member 22 pushes the stripping wedge 5 downward into the gap between the adhesive portion 42, separating the adhesive portion 42 of the cigarette box 4 to form a stripping portion 43. At this time, the stripping wedge 5 and the contact switch 23 are in contact. Disengagement, the control unit sends a signal to the first pressure gauge 33, the first pressure gauge 33 locks its currently detected pressure value and displays it externally, the laser emitted by the transmitting module 15 is transmitted to the receiving module 53 via the signal optical fiber 7, the receiving module 53 sends a laser signal to the control unit, the control unit sends a signal to the pressure supply mechanism 3 to stop applying pressure, and because the peeling wedge 5 pushes the peeling portion 43 away from the main body of the cigarette box 4, the peeling portion 43 contacts the second pressure gauge 6, the second pressure gauge 6 detects the horizontal force applied by the peeling portion 43, and the second pressure gauge 6 sends a pressure signal to the control unit;

[0053] S2: The pressure value displayed by the first pressure gauge 33 is defined as the adhesive strength of the cigarette box to be tested. If the adhesive strength is less than 28N, the cigarette box is judged to be unqualified. For the cigarette box samples 4 with unqualified adhesive strength, white cardboard produced in the same batch as the unqualified cigarette box samples 4 is reselected and quality tests on other strength indicators are performed to determine whether it is a common quality problem. The amount of white cardboard reselected for quality testing needs to be increased accordingly;

[0054] S3: During the test, the control unit must receive the laser signal and the pressure signal at the same time, and the test result will be considered valid. Otherwise, readjust and continue the test.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A quality inspection device for white cardboard production, characterized by: include a workbench for placing cigarette boxes; A driving wedge is located above the workbench and can be raised and lowered vertically. The bottom tip of the driving wedge is vertically slidably connected to a stripping wedge. In an initial state, the bottom tip of the stripping wedge is used to contact the adhesive portion of the cigarette case. A contact switch is provided at a position of the driving wedge corresponding to the top of the stripping wedge. A first return member is provided between the driving wedge and the stripping wedge. a pressure supply mechanism for applying vertical downward pressure to the driving wedge, wherein a first pressure gauge is provided between the driving wedge and the pressure supply mechanism, and the first pressure gauge is capable of recording and displaying the pressure value applied by the pressure supply mechanism to the driving wedge; a second pressure gauge, arranged on a side of the peeling wedge away from the cigarette box, for detecting the force applied in the horizontal direction when the peeling portion is separated; The control unit is electrically connected to the contact switch, and the control unit is electrically connected to the first pressure gauge. During detection, the top of the wedge is driven to contact the contact switch. At the moment when the peeling part of the cigarette box is separated, the first return member pushes the peeling wedge to separate from the contact switch. When the peeling wedge is separated from the contact switch, the first pressure gauge locks the current pressure value.

2. The quality inspection device for white cardboard production according to claim 1, characterized in that: A transmitting module is provided on the workbench on one side of the driving wedge, for emitting horizontal laser light. The setting height of the transmitting module is lower than the height of the bottom tip of the stripping wedge in the initial state, and the transmitting module emits laser light toward the stripping wedge. A receiving module is fixed on the side of the stripping wedge away from the transmitting module. Both the transmitting module and the receiving module are electrically connected to the control unit. When the receiving module and the transmitting module are at the same height, the receiving module receives the laser signal from the transmitting module, and the pressure supply mechanism stops applying pressure.

3. The quality inspection device for white cardboard production according to claim 2, characterized in that: A signal optical fiber is passed through the stripping wedge, one end of the signal optical fiber is horizontally facing one side of the transmitting module, and the other end of the signal optical fiber is at the same height as the receiving module and faces the receiving module. The end of the signal optical fiber facing the transmitting module is movably connected to the stripping wedge.

4. The quality inspection device for white cardboard production according to claim 1, characterized in that: The second pressure gauge is placed horizontally and includes a pressure probe facing the stripping wedge. The setting height of the pressure probe is lower than the height of the bottom tip of the stripping wedge in the initial state. The pressure probe is used to be placed close to the stripping part of the cigarette box.

5. The quality inspection device for white cardboard production according to claim 4, characterized in that: The stripping wedge includes a stripping slope, which is arranged on a side of the stripping wedge close to the second pressure gauge. The distance between the stripping slope and the pressure probe gradually increases from top to bottom.

6. The quality inspection device for white cardboard production according to claim 5, characterized in that: The stripping wedge is internally slidably connected with a separation block, and the separation block can slide out of the stripping wedge from the stripping slope. The stripping wedge is provided with a suction component for controlling the separation block to extend or retract into the stripping wedge.

7. The quality inspection device for white cardboard production according to claim 6, characterized in that: The suction component includes a first suction member, a second suction member and a second return member. The first suction member is fixed in the stripping wedge and electrically connected to the control unit. The second suction member is fixed to the separation block. The first suction member and the second suction member correspond in position. One end of the second return member is connected to the stripping wedge and the other end is connected to the separation block. The first suction member can be connected to an external power supply, and the first suction member is adsorbed together with the second suction member after being energized.

8. The quality inspection device for white cardboard production according to claim 4, characterized in that: The peeling wedge is provided with an anti-stick coating on the peeling inclined surface and the side wall surface away from the peeling inclined surface.

9. A quality inspection method for white cardboard production, characterized by: The quality inspection device for white cardboard production according to any one of claims 1 to 8 is used to inspect the quality of white cardboard production, comprising the following steps: S1: Select a finished white cardboard sample and make it into a cigarette box sample to be tested. Place the cigarette box sample to be tested on a workbench and fix it in place. Align the bottom tip of the peeling wedge with the adhesive portion of the cigarette box. Start the pressure supply mechanism, which applies downward pressure to the peeling wedge and gradually increases the applied pressure. The first pressure gauge continuously detects the downward pressure value applied by the pressure supply mechanism. At the moment the adhesive portion of the cigarette box separates, the first return member pushes the peeling wedge downward into the gap where the adhesive portion separates, separating the adhesive portion of the cigarette box to form a peeling portion. At this time, the peeling wedge disengages from the contact switch, and the control unit sends a signal to the first pressure gauge. The first pressure gauge locks its currently detected pressure value and displays it externally. The laser emitted by the transmitting module is transmitted to the receiving module via the signal optical fiber. The receiving module sends a laser signal to the control unit. The control unit sends a signal to the pressure supply mechanism to stop applying pressure. Since the peeling wedge pushes the peeling portion away from the cigarette box body, the peeling portion contacts the second pressure gauge. The second pressure gauge detects the horizontal force applied by the peeling portion, and the second pressure gauge sends a pressure signal to the control unit. S2: The pressure value displayed by the first pressure gauge is defined as the adhesive strength of the cigarette case sample to be tested. If the adhesive strength is less than 28N, the sample is judged to be unqualified. For cigarette case samples with unqualified adhesive strength, white cardboard produced in the same batch as the unqualified cigarette case samples is re-selected for quality inspection to determine whether the problem is common. S3: During the test, the control unit must receive the laser signal and the pressure signal at the same time, and the test result will be considered valid. Otherwise, readjust and continue the test.

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