A device and method for measuring folding forming parameters of paper and paper-based composite materials

Abstract

The present application relates to the technical field of paper measurement, and in particular to a device for measuring the folding and forming degree parameters of paper and paper-based composite materials, which comprises a transparent semi-enclosed chamber, a base and a measuring device body, wherein the measuring device body comprises a detection platform, a flattening mechanism, a bending mechanism and a forming mechanism; the detection platform surface is used to carry paper, the flattening mechanism is located above the detection platform for flattening the paper, the bending mechanism is installed above the bending line outside the detection platform, the bending mechanism comprises a vertical bending die, the forming mechanism is used for horizontally pressing the bent paper, a laser distance measuring device is arranged inside the detection platform, the laser distance measuring device is used to detect the vertical distance between the horizontal plane of the intersection point of the paper and the outer plate of the detection platform and the laser distance measuring device, and the laser distance measuring device is also used to detect the horizontal distance between the intersection point of the laser distance measuring device and the paper after rebounding in the horizontal direction.

Description

Technical Field

[0001] The present application relates to the technical field of paper measurement, and in particular to a device and method for measuring folding forming degree parameters of paper and paper-based composite materials. Background Art

[0002] General packaging materials such as paper or film usually have a certain degree of elasticity and plasticity, that is, when these materials are subjected to external forces such as bending and extrusion, they will deform accordingly with the external force, but this deformation is not permanent. Instead, under the action of the elasticity of the material, when the external force disappears, a certain degree of rebound and recovery will occur. This property is called the degree of forming of packaging materials in the packaging industry. The degree of forming refers to the rebound angle measured after the paper is folded into 90° under pressure and the pressure is released within a period of time. The smaller the rebound angle, the better the degree of forming. If the paper rebounds strongly after folding, the rebound angle will be too large, causing the folder and the edge of the paper to intersect incorrectly, which is prone to misalignment and slippage, unstable packaging quality and deformation, which is easy to hinder the operation of the packaging machine and cause paper waste. Therefore, it can be said that measuring the degree of forming of paper has become an indispensable inspection step before packaging. And with the continuous expansion and development of the packaging industry and the continuous improvement of people's consumption level, the packaging machine has higher and higher requirements for the degree of forming of paper.

[0003] In the related art, the invention patent with patent number CN2011103325904 discloses a paper forming degree measuring instrument, including a base 3, a bracket 7, a paper pressing mechanism and an angle measuring mechanism; the measuring instrument has a simple structure, is easy and convenient to operate, is suitable for measuring different folding forming rebound angle values, and has a fast measuring speed and high accuracy; by measuring the forming degree rebound angle of the paper through the measuring instrument, the material that does not meet the requirements can be returned for reprocessing in time, avoiding the situation of estimating the paper forming degree while packaging on the packaging machine, reducing material waste, increasing packaging speed, and greatly reducing material costs.

[0004] With respect to the above-mentioned related technologies, the applicant believes that the following problems exist: when existing material forming degree detection equipment detects the rebound angle of the packaging material after bending, it basically uses a camera to take photos or capture real-time images, and in the photo or real-time image, it connects the packaging material and marks the angle between the line and the vertical plane, and then uses auxiliary software to measure the angle. This measurement method has the problems of large errors and low measurement efficiency. Summary of the invention

[0005] In order to overcome the problems of single function and low measurement accuracy in existing measurement methods and measurement equipment, the present application provides a device and method for measuring folding forming degree parameters of paper and paper-based composite materials.

[0006] The present application provides a device and method for measuring the folding forming parameters of paper and paper-based composite materials using the following technical solutions:

[0007] A device for measuring the folding forming degree parameters of paper and paper-based composite materials, comprising a transparent semi-enclosed warehouse, a base and a measuring device body, wherein the measuring device body is mounted on the base and arranged inside the transparent semi-enclosed warehouse body, and the measuring device body comprises a detection platform, a flattening mechanism, a bending mechanism and a forming mechanism; the detection platform surface is used to carry paper, the flattening mechanism is located above the detection platform for flattening the paper, the bending mechanism is installed above the bending line outside the detection platform, the bending mechanism comprises a vertical bending mold, the forming mechanism is arranged on one side of the detection platform, the forming mechanism is used for horizontally pressing the bent paper, a laser distance measuring device is arranged inside the detection platform, the laser distance measuring device is used to detect the vertical distance between the horizontal plane of the intersection point of the paper and the outer plate of the detection platform and the laser distance measuring device, and the laser distance measuring device is also used to detect the horizontal distance between the intersection point of the laser distance measuring device and the paper after rebounding in the horizontal direction.

[0008] Preferably, the flattening mechanism includes a flattening cylinder and a flattening plate, the flattening cylinder is installed inside the transparent semi-closed warehouse body with the piston rod vertically facing the upper surface of the detection platform, the flattening plate is vertically fixed to the end of the piston rod of the flattening cylinder, and the surface of the flattening plate and the upper surface of the detection platform are both provided with a high-friction composite layer.

[0009] Preferably, the molding mechanism comprises a molding cylinder transversely mounted on the base and a transverse pressing plate connected to an end of the molding cylinder, and a pressure sensor is arranged between the molding cylinder and the transverse pressing plate.

[0010] Preferably, a left end plate is hinged on the upper edge of the outer side plate of the detection platform, and the inclination angle of the left end plate is adjusted by a controllable gas spring to achieve the angle between the left end plate and the top plate of the detection platform being positioned at any value.

[0011] Preferably, the portion where the lower end of the telescopic rod of the bending cylinder is connected to the vertical bending mold adopts a radial offset structure, and the vertical bending mold can be deflected at any angle along the bending direction of the paper and always maintains contact with the paper and the left end plate.

[0012] Preferably, the connection portion between the piston rod end of the forming cylinder and the transverse pressing plate adopts a radial offset structure, and the transverse pressing plate can be deflected at any angle in the vertical direction and always keeps in contact with the paper and the left end plate.

[0013] Preferably, an annular track is installed on the base, a bracket is slidably arranged on the annular track, a driving member for driving the bracket to move is arranged on the annular track, a laser reader and a gyro positioner are installed on the bracket, the laser reader is used to read a cursor added to the surface of the paper, and the bracket and the gyro positioner move following the movement of the paper.

[0014] Preferably, a lifting member is provided on the base, the laser ranging device is mounted on the lifting member, and the lifting member is used to adjust the position of the laser ranging device in the vertical direction.

[0015] A method for measuring folding degree parameters of paper and paper-based composite materials is implemented by using the above-mentioned device for measuring folding degree parameters of paper and paper-based composite materials, and comprises the following steps:

[0016] A1: Take the paper and paper-based composite material samples to be tested, make the samples according to the standard size, and place them on the testing platform, with the part to be bent suspended outside the testing platform and the fixed part attached to the testing platform as a whole;

[0017] A2: The fixed end of the paper and paper-based composite material sample is pressed by a pressing plate. At the same time, the vertical distance L between the horizontal plane of the intersection of the paper and paper-based composite material sample and the outer plate of the detection platform and the laser distance measuring device set under the detection platform is used as the detection reference value;

[0018] A3: According to the angle requirement of the measurement, adjust the inclination angle of the left end plate of the detection platform to the required degree, and adjust the angles of other corresponding components simultaneously, and then close and isolate interference;

[0019] A4: Through the operation of the bending mechanism, the vertical bending die bends the paper and paper-based composite material samples vertically along the contact line between them and the edge of the testing platform. During the bending process, the vertical bending die always keeps in contact with the left end plate of the testing platform;

[0020] A5: After the vertical bending mold is recovered, the forming mechanism works, and the transverse pressing plate on it extends toward the bent paper and paper-based composite material samples, pressing them tightly against the left end plate of the testing platform and maintaining a constant pressure for 5-10S, after which the transverse pressing plate is retracted;

[0021] A6: The bent and formed paper and paper-based composite samples rebound naturally. After the rebound stabilizes, the vertical laser distance measuring device first determines whether the vertical spacing L' between the horizontal plane of the intersection of the paper and paper-based composite sample and the outer plate of the detection platform after bending is equal to the vertical spacing L before bending. If not, the vertical position of the laser distance measuring device is adjusted until the two are equal. After confirming that L' is equal to L, the laser distance measuring device emits a distance measuring light perpendicular to the vertical spacing L' to measure the lateral spacing H between the intersection points of the laser distance measuring device and the bent part of the paper and paper-based composite sample on the same straight line. After confirming the two values ​​of L' and H, the degree of the angle α between the vertical spacing and the lateral spacing is calculated by trigonometric function, that is, the rebound angle of the paper and paper-based composite sample after bending, that is, its forming degree, and the value is presented on the output device.

[0022] A method for measuring folding degree parameters of paper and paper-based composite materials is implemented by using the above-mentioned device for measuring folding degree parameters of paper and paper-based composite materials, and comprises the following steps:

[0023] B1: Take the paper and paper-based composite material samples to be tested, make the samples according to the standard size, and set a readable cursor on the longitudinal edge of the part to be bent of the sample, and then place the sample on the testing platform, wherein the part to be bent is suspended outside the testing platform, and the fixed part is integrally attached to the testing platform;

[0024] B2: The fixed end of the paper and paper-based composite material sample is pressed by a pressing plate. At the same time, the readable cursor on the sample is detected by a laser reader fixed on a bracket that can rotate around the detection platform, and the driving part and the sample are synchronized. At the same time, the gyro positioner connected to the bracket also rotates synchronously with it;

[0025] B3: According to the angle requirement of the measurement, adjust the inclination angle of the left end plate of the detection platform to the required degree, and adjust the angles of other corresponding components simultaneously, and then close and isolate interference;

[0026] B4: Through the operation of the bending mechanism, the vertical bending die bends the paper and paper-based composite material samples vertically along the contact line between them and the edge of the testing platform. During the bending process, the vertical bending die always keeps in contact with the left end plate of the testing platform; and the bracket and the gyro positioner rotate with the movement of the sample;

[0027] B5: After the vertical bending mold is recovered, the forming mechanism works, and the transverse pressing plate on it extends toward the bent paper and paper-based composite material samples, pressing them tightly against the left end plate of the testing platform and maintaining a constant pressure for 5-10S, after which the transverse pressing plate is retracted;

[0028] B6: The bent and formed paper and paper-based composite samples rebound naturally. After the rebound stabilizes, the laser reader locks the readable cursor on the sample and transmits the tilt state of the sample's bent part to the gyro positioner through the positioned bracket. The gyro positioner measures the exact angle and transmits the value to the output device for presentation.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. This application can realize the molding degree detection of paper and paper-based composite materials after bending at multiple angles or even at any angle. When applied to actual production, it can detect the rebound condition of packaging materials of various special-shaped packaging boxes after bending, including rectangular packaging, to promote the development of the packaging industry;

[0031] 2. When detecting the rebound angle of the packaging material after bending, the forming degree detection method and equipment of this application do not use a camera to take pictures or capture real-time images and then measure the angle. Instead, it uses laser ranging and then automatic conversion, or uses a gyro positioner combined with computer vision tracking technology to quickly and intuitively obtain the corresponding angle. The detection is fast, the accuracy is high, the operation is simple, and it has more advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of a device for measuring folding forming degree parameters of paper and paper-based composite materials in Example 2 of the present application.

[0033] Figure 2 It is a partial cross-sectional view of the left end plate and the detection platform of a device for measuring folding forming degree parameters of paper and paper-based composite materials in Example 2 of the present application.

[0034] Figure 3 It is a schematic diagram of the overall structure of a device for measuring folding forming degree parameters of paper and paper-based composite materials in Example 3 of the present application.

[0035] Explanation of the reference numerals in the accompanying drawings: 1. base; 1a. first bearing frame; 1b. second bearing frame; 1c. bearing plate; 2. transparent semi-enclosed warehouse body; 3. transparent enclosed flip cover; 4. electric control box; 5. operation panel; 6. detection platform; 7. flattening mechanism; 71. flattening cylinder; 72. flattening plate; 8. bending mechanism; 81. bending cylinder; 82. vertical bending mold; 9. forming mechanism; 91. forming cylinder; 92. horizontal pressing plate; 10. laser rangefinder; 101. vertical ranging sensor; 102. horizontal ranging sensor; 11. ring track; 12. bracket; 13. electric slide seat; 14. laser reader; 15. gyro positioner. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0037] Embodiment 1:

[0038] The embodiments of the present application disclose a device and method for measuring folding degree parameters of paper and paper-based composite materials.

[0039] Reference Figure 1 and Figure 2 A device for measuring the folding forming degree parameters of paper and paper-based composite materials comprises a base 1, a transparent semi-enclosed warehouse body 2, a transparent closed flip cover 3, a measuring device body, an electric control box 4 and an operation panel 5. The base 1 is erected on the ground and is arranged in a rectangular parallelepiped shape. The measuring device body, the electric control box 4 and the operation panel 5 are all installed on the base 1, and the measuring device body is arranged inside the transparent semi-enclosed warehouse body 2. The transparent semi-enclosed warehouse body 2 and the transparent closed flip cover 3 are connected and supported by a gas pressure spring.

[0040] Furthermore, the main body of the measuring device includes a detection platform 6, a flattening mechanism 7, a bending mechanism 8 and a forming mechanism 9; the flattening mechanism 7 is located above the detection platform 6 for flattening the paper, and the bending mechanism 8 is installed above the bending line on the outer side of the detection platform 6. Among them, the detection platform 6, the flattening mechanism 7 and the bending mechanism 8 are installed at one end of the transparent semi-enclosed warehouse 2 close to the electric control box 4 and the operation panel 5. At the same time, a first carrier frame 1a is provided at a position close to the back plate of the transparent semi-enclosed warehouse 2, and the flattening mechanism 7 and the bending mechanism 8 are respectively installed on both sides of the first carrier frame 1a. In addition, a second carrier frame 1b is fixed to the upper surface of the base 1, and the second carrier frame 1b is located on one side of the detection platform 6, and the forming mechanism 9 is correspondingly installed on the second carrier frame 1b.

[0041] Correspondingly, the surface of the detection platform 6 is used to support the paper, and the flattening mechanism 7 includes a flattening cylinder 71 and a flattening plate 72. The flattening cylinder 71 is installed inside the transparent semi-enclosed warehouse body 2 and the piston rod is vertically facing the upper surface of the detection platform 6. The flattening plate 72 is vertically fixed to the end of the piston rod of the flattening cylinder 71. The flattening plate 72 is horizontally arranged. When the piston rod of the flattening cylinder 71 is extended, it drives the flattening plate 72 to move downward, thereby pressing a partial area of ​​the paper located on the upper surface of the detection platform 6.

[0042] Furthermore, the surface of the pressing plate 72 and the upper surface of the detection platform 6 are both provided with a high friction composite layer, thereby increasing the friction force when in contact with the surface of the paper and improving the stability of the paper.

[0043] In addition, the bending mechanism 8 is installed above the bending line on the outer side of the detection platform 6. The bending mechanism 8 includes a bending cylinder 81 and a vertical bending mold 82. The piston rod of the bending cylinder 81 is arranged vertically downward. The bending cylinder 81 is fixed to the side wall of the first carrier frame 1a. The vertical bending mold 82 is vertically fixed to the end of the piston rod of the bending cylinder 81. The cross-section of the vertical bending mold 82 is L-shaped. The vertical bending mold 82 is located on one side of the vertical plane where the outer plate of the detection platform 6 is located. When the bending cylinder 81 is started, the piston rod of the bending cylinder 81 drives the vertical bending mold 82 to move downward. Since the angle between the outer plate and the top plate of the detection platform 6 is a right angle, under the stamping of the vertical bending mold 82, a partial area of ​​the paper located on the outer side of the top plate of the detection platform 6 is bent downward.

[0044] Furthermore, the forming mechanism 9 includes a forming cylinder 91 installed horizontally on the base 1 and a horizontal pressure plate 92 connected to the end of the forming cylinder 91. Specifically, a second carrier frame 1b is installed on the upper surface of the base 1, and the forming cylinder 91 is installed on the second carrier frame 1b. The piston rod of the forming cylinder 91 is facing the outer plate of the detection platform 6, and the horizontal pressure plate 92 is vertically fixed to the end of the piston rod of the forming cylinder 91. When the forming cylinder 91 is started, the piston rod of the bending cylinder 81 retracts the vertical bending mold 82, and the horizontal pressure plate 92 moves toward the detection platform 6 to further press the folded paper so that the paper can fit the outer plate of the detection platform 6 so that the paper forms a 90° angle.

[0045] On the other hand, the detection platform 6 is arranged in a rectangular shape, and the interior of the detection platform 6 is hollow. A laser distance measuring device is arranged inside the detection platform 6. The laser distance measuring device is used to detect the vertical distance between the horizontal plane of the intersection point of the paper and the outer plate of the detection platform 6 and the laser distance measuring device. The laser distance measuring device is also used to detect the horizontal distance between it and the intersection point of the paper after rebounding in the horizontal direction.

[0046] Specifically, a vertical distance measuring sensor 101 and a horizontal distance measuring sensor 102 perpendicular to each other are respectively installed on the top and side surfaces of the laser distance measuring device; the vertical distance measuring sensor 101 detects the vertical distance between the horizontal plane of the intersection of the paper and paper-based composite material sample and the outer plate of the detection platform 6 and the vertical distance measuring sensor 101; the horizontal distance measuring sensor 102 detects the horizontal distance between it and the intersection point of the paper and paper-based composite material sample after rebounding in the horizontal direction.

[0047] Furthermore, by calculating the values ​​of the vertical spacing and the horizontal spacing through trigonometric functions, the value of the angle formed between the vertical spacing and the horizontal spacing can be obtained, so that the rebound angle of the paper and paper-based composite material sample after bending can be measured.

[0048] It should be noted that, in the embodiment of the present application, through holes are opened on the outer plate and the top of the detection platform 6 to provide conditions for the laser penetration of the vertical ranging sensor 101 and the horizontal ranging sensor 102 .

[0049] Furthermore, a lifting cylinder is installed on the upper surface of the base 1, and the piston rod of the lifting cylinder is arranged vertically upward. The end of the piston rod of the lifting cylinder is vertically fixed with a supporting plate 1c, and the laser ranging device is installed on the upper surface of the supporting plate 1c. Through the action of the lifting cylinder, the position of the laser ranging device in the vertical direction can be adjusted.

[0050] The implementation principle of the device for measuring the folding degree parameters of paper and paper-based composite materials in the embodiment of the present application is as follows:

[0051] By precisely controlling the fixing, bending, forming and rebounding processes of the sample, combined with the high-precision measurement of the laser distance measuring device, the flexibility and rebound performance of the material at a specific bending angle are systematically evaluated. First, the sample is fixed on the detection platform 6, and the reference value L is set by the laser distance measuring device; then, the sample is bent and formed under controlled conditions through the operation of the bending mechanism 8 and the forming mechanism 9; finally, the distance L' and the lateral distance H between the sample and the platform after rebound are measured by the laser distance measuring device, and the rebound angle α, that is, the degree of forming, is calculated by trigonometric functions, so as to quantitatively evaluate the bending performance and rebound characteristics of the material. This series of steps ensures the accuracy and repeatability of the test, and provides a scientific basis for the performance evaluation of paper and paper-based composite materials.

[0052] Embodiment 2:

[0053] The difference from Example 1 is that the upper edge of the outer plate of the detection platform 6 is hinged with a left end plate, and the inclination angle of the left end plate is adjusted by a controllable gas spring to achieve the angle between it and the top plate of the detection platform being positioned at any value.

[0054] Furthermore, the portion where the lower end of the telescopic rod of the bending cylinder 81 is connected to the vertical bending mold 82 adopts a radial offset structure, and the vertical bending mold 82 can be deflected at any angle along the bending direction of the paper and always keep in contact with the paper and the left end plate.

[0055] At the same time, the connection between the piston rod end of the forming cylinder 91 and the transverse pressing plate 92 adopts a radial offset structure, and the transverse pressing plate 92 can deflect to any angle in the vertical direction and always keep in contact with the paper and the left end plate.

[0056] In summary, by adjusting the angles of the left end plate, the vertical bending mold and the transverse pressing plate 92, it is possible to adapt to the test of different bending angles of paper.

[0057] In addition, the embodiment of the present application also discloses a method for measuring the folding degree parameters of paper and paper-based composite materials, which is performed using the above-mentioned device for measuring the folding degree parameters of paper and paper-based composite materials, and includes the following steps:

[0058] A1: Take the paper and paper-based composite material samples to be tested, make the samples according to the standard size, and place them on the testing platform 6, wherein the part to be bent is suspended outside the testing platform 6, and the fixed part is integrally attached to the testing platform 6;

[0059] A2: The fixed end of the paper and paper-based composite material sample is pressed by the pressing plate 72. At the same time, the vertical distance L between the horizontal plane of the intersection of the paper and paper-based composite material sample and the outer plate of the detection platform 6 and the laser distance measuring device is used as the detection reference value by the laser distance measuring device arranged below the detection platform 6;

[0060] A3: According to the angle requirement of the measurement, the inclination angle value of the left end plate of the detection platform 6 is adjusted to the required degree, and the angles of other corresponding components are also adjusted synchronously, and then closed to isolate interference;

[0061] A4: The bending mechanism 8 works, and the vertical bending die 82 vertically bends the paper and paper-based composite material sample along the contact line between the paper and the edge of the testing platform 6. During the bending process, the vertical bending die 82 always keeps in contact with the left end plate of the testing platform 6.

[0062] A5: After the vertical bending mold 82 is recovered, the forming mechanism 9 works, and the transverse pressing plate 92 thereon extends toward the bent paper and paper-based composite material sample, pressing it against the left end plate of the testing platform 6, and maintaining a constant pressure for 5-10 seconds, after which the transverse pressing plate 92 is retracted;

[0063] A6: The bent and formed paper and paper-based composite material samples rebound naturally. After the rebound stabilizes, the vertical laser distance measuring device first determines whether the vertical spacing L' between the horizontal plane of the intersection of the paper and paper-based composite material sample and the outer plate of the detection platform 6 after bending is equal to the vertical spacing L before bending. If not, the vertical position of the laser distance measuring device is adjusted until the two are equal. After confirming that L' is equal to L, the laser distance measuring device emits a distance measuring light perpendicular to the vertical spacing L' to measure the lateral spacing H between the intersection points of the laser distance measuring device and the bent part of the paper and paper-based composite material sample on the same straight line. After confirming the two values ​​of L' and H, the degree of the angle α between the vertical spacing and the lateral spacing is calculated by trigonometric function, that is, the rebound angle of the paper and paper-based composite material sample after bending, that is, its forming degree, and the value is presented on the output device.

[0064] Embodiment 3:

[0065] Reference Figure 3 , which is different from Example 2, is that a ring-shaped track 11 is installed on the base 1, a bracket 12 is slidably arranged on the ring-shaped track 11, a driving member for driving the bracket 12 to move is arranged on the ring-shaped track 11, and the driving member is correspondingly arranged as an electric slide 13. In addition, the electric slide 13 has a built-in motor, which can control the bracket 12 to move along the ring-shaped track 11 and drive the bracket 12 to rotate. A laser reader 14 and a gyro positioner 15 are installed on the bracket 12. The laser reader 14 is used to read a cursor added to the surface of the paper, and the bracket 12 and the gyro positioner 15 move with the movement of the paper.

[0066] Specifically, the annular track 11 on the base 1 provides a sliding path for the bracket 12, ensuring that the bracket 12 can perform precise circular motion around the detection platform 6. The electric slide 13, as a driving component, has a built-in motor, which not only controls the linear motion of the bracket 12 along the annular track 11, but also realizes the rotation of the bracket 12, ensuring that the bracket 12 can follow the bending action of the paper and paper-based composite material sample and rotate synchronously to maintain the continuous monitoring of the sample by the laser reader 14 and the gyro positioner 15.

[0067] The laser reader 14 is mounted on the bracket 12 and is used to read the cursor pre-set on the paper surface. This cursor is used as a positioning reference during the detection process to help the system track the position and movement state of the sample in real time. The gyro positioner 15 is also mounted on the bracket 12, which can measure the rotation angle of the bracket 12 and thus reflect the bending angle of the sample. During the detection process, when the sample is bent, the bracket 12 and the gyro positioner 15 move with the movement of the sample, and the bending angle data measured by the gyro positioner 15 is transmitted to the output device in real time for presentation and recording.

[0068] The coordinated work of this series of structures, combined with precise mechanical motion control and high-precision optical and electronic measurement technology, realizes the precise detection of the bending properties of paper and paper-based composite materials. From sample fixation, bending to rebound measurement, the entire detection process not only ensures the accuracy and reliability of the detection, but also provides a scientific basis for material performance evaluation and quality control, reflecting the efficiency and precision of modern detection technology.

[0069] Correspondingly, the embodiment of the present application further discloses a method for measuring the folding degree parameters of paper and paper-based composite materials, which is performed using the above-mentioned device for measuring the folding degree parameters of paper and paper-based composite materials, and includes the following steps:

[0070] B1: Take the paper and paper-based composite material samples to be tested, make the samples according to the standard size, and set a readable cursor on the longitudinal edge of the part to be bent of the sample, and then place the sample on the testing platform 6, wherein the part to be bent is suspended outside the testing platform 6, and the fixed part is integrally attached to the testing platform 6;

[0071] B2: The fixed end of the paper and paper-based composite material sample is pressed by the pressing plate 72. At the same time, the laser reader 14 fixed on the bracket 12 that can rotate around the detection platform 6 detects the readable cursor on the sample, and the driving member and the sample are synchronized. At the same time, the gyro positioner 15 connected to the bracket 12 also rotates synchronously with it;

[0072] B3: According to the angle requirement of the measurement, the inclination angle value of the left end plate of the detection platform 6 is adjusted to the required degree, and the angles of other corresponding components are also adjusted synchronously, and then closed to isolate interference;

[0073] B4: The bending mechanism 8 works, and the vertical bending die 82 vertically bends the paper and paper-based composite material sample along the contact line with the edge of the detection platform 6. During the bending process, the vertical bending die 82 always keeps in contact with the left end plate of the detection platform 6; and the bracket 12 and the gyro positioner 15 rotate along with the movement of the sample;

[0074] B5: After the vertical bending mold 82 is recovered, the forming mechanism 9 works, and the transverse pressing plate 92 thereon extends toward the bent paper and paper-based composite material sample, pressing it tightly against the left end plate of the detection platform 6, and maintaining a constant pressure for 5-10S, after which the transverse pressing plate 92 is retracted;

[0075] B6: The bent and formed paper and paper-based composite material samples rebound naturally. After the rebound stabilizes, the laser reader 14 locks the readable cursor on the sample and transmits the tilt state of the bent portion of the sample to the gyro positioner 15 through the positioned bracket 12, which measures the accurate angle and transmits the value to the output device for presentation.

[0076] It should be noted that the gyro positioner 15 is combined with computer vision tracking technology; in addition, in other embodiments, the laser reader 14 on the bracket 12 can also be replaced with a single-transmitting and single-receiving ultrasonic module to detect the distance between it and the fixed point on the sample bending portion in real time, and feed back to the driving device of the bracket 12 for real-time adjustment, and can also realize the synchronous rotation of the bracket 12 and the sample bending portion, thereby realizing the synchronous action of the gyro positioner 15 and obtaining the sample rebound angle.

[0077] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for measuring folding forming parameters of paper and paper-based composite materials, characterized in that: The device comprises a transparent semi-enclosed chamber (2), a base (1) and a measuring device body, wherein the measuring device body is mounted on the base (1) and arranged inside the transparent semi-enclosed chamber (2), and the measuring device body comprises a detection platform (6), a flattening mechanism (7), a bending mechanism (8) and a shaping mechanism (9); the surface of the detection platform (6) is used to carry paper, the flattening mechanism (7) is located above the detection platform (6) for flattening the paper, and the bending mechanism (8) is mounted on the outside of the detection platform (6). Above the bending line, the bending mechanism (8) comprises a vertical bending die (82), the forming mechanism (9) is arranged on one side of the detection platform (6), the forming mechanism (9) is used for horizontally pressing the bent paper, the detection platform (6) is provided with a laser distance measuring device inside, the laser distance measuring device is used for detecting the vertical distance between the horizontal plane of the intersection point of the paper and the outer plate of the detection platform (6) and the laser distance measuring device, and the laser distance measuring device is also used for detecting the horizontal distance between the intersection point of the paper and the rebounded paper in the horizontal direction; The flattening mechanism (7) comprises a flattening cylinder (71) and a flattening plate (72); the flattening cylinder (71) is installed inside the transparent semi-enclosed chamber (2) with its piston rod vertically facing the upper surface of the detection platform (6); the flattening plate (72) is vertically fixed to the end of the piston rod of the flattening cylinder (71); and the surface of the flattening plate (72) and the upper surface of the detection platform (6) are both provided with a high-friction composite layer; The molding mechanism (9) comprises a molding cylinder (91) installed transversely on the base (1) and a transverse pressing plate (92) connected to the end of the molding cylinder (91), and a pressure sensor is provided between the molding cylinder (91) and the transverse pressing plate (92); The upper edge of the outer plate of the detection platform (6) is hinged with a left end plate, and the inclination angle of the left end plate is adjusted by a controllable gas spring to achieve the angle between the left end plate and the top plate of the detection platform being positioned at any value; The base (1) is provided with an annular track (11), a bracket (12) is slidably provided on the annular track (11), a driving member for driving the bracket (12) to move is provided on the annular track (11), a laser reader (14) and a gyro position finder (15) are provided on the bracket (12), the laser reader (14) is used to read a cursor added to the surface of a paper, and the bracket (12) and the gyro position finder (15) move in accordance with the movement of the paper.

2. A device for measuring folding degree parameters of paper and paper-based composite materials according to claim 1, characterized in that: The portion where the lower end of the telescopic rod of the bending cylinder (81) is connected to the vertical bending mold (82) adopts a radial offset structure, and the vertical bending mold (82) can be deflected at any angle along the bending direction of the paper and always keep in contact with the paper and the left end plate.

3. A device for measuring folding forming parameters of paper and paper-based composite materials according to claim 1, characterized in that: The connection portion between the piston rod end of the forming cylinder (91) and the transverse pressing plate (92) adopts a radial offset structure, and the transverse pressing plate (92) can be deflected at any angle in the vertical direction and always keeps in contact with the paper and the left end plate.

4. The device for measuring folding forming parameters of paper and paper-based composite materials according to claim 1, characterized in that: The base (1) is provided with a lifting member, the laser distance measuring device is mounted on the lifting member, and the lifting member is used to adjust the position of the laser distance measuring device in the vertical direction.

5. A method for measuring folding degree parameters of paper and paper-based composite materials, which is performed by using the device for measuring folding degree parameters of paper and paper-based composite materials as claimed in claim 3, characterized in that: The following steps are involved: A1: Take a sample of paper or paper-based composite material to be tested, make the sample according to the standard size, and place it on the testing platform (6), wherein the portion to be bent is suspended outside the testing platform (6), and the fixed portion is integrally attached to the testing platform (6); A2: The fixed end of the paper or paper-based composite material sample is pressed tightly by a pressing plate (72), and at the same time, a laser distance measuring device arranged below the detection platform (6) is used to measure the vertical distance L between the horizontal plane of the intersection of the paper or paper-based composite material sample and the outer plate of the detection platform (6) and the laser distance measuring device as a detection reference value; A3: According to the angle requirement of the measurement, the inclination angle value of the left end plate of the detection platform (6) is adjusted to the required degree, and the angles of other corresponding components are also adjusted synchronously, and then closed to isolate interference; A4: The bending mechanism (8) works so that the vertical bending die (82) vertically bends the paper or paper-based composite material sample along the contact line between the paper or paper-based composite material sample and the edge of the testing platform (6). During the bending process, the vertical bending die (82) always keeps in contact with the left end plate of the testing platform (6); A5: After the vertical bending mold (82) is recovered, the forming mechanism (9) works, and the transverse pressing plate (92) thereon extends toward the bent paper and paper-based composite material sample, pressing it against the left end plate of the detection platform (6) and maintaining a constant pressure for 5-10 seconds, after which the transverse pressing plate (92) is retracted; A6: The bent and formed paper and paper-based composite material sample rebounds naturally. After the rebound stabilizes, the vertical laser distance measuring device first determines whether the vertical distance L' between the horizontal plane of the intersection point of the paper and paper-based composite material sample and the outer plate of the detection platform (6) after bending is equal to the vertical distance L before bending. If they are not equal, the vertical position of the laser distance measuring device is adjusted until the two are equal. After confirming that L' is equal to L, the laser distance measuring device emits a distance measuring light perpendicular to the vertical distance L' to measure the horizontal distance H between the intersection points of the laser distance measuring device and the bent part of the paper and paper-based composite material sample on the same straight line. After confirming the two values ​​of L' and H, the degree of the angle α between the vertical distance and the horizontal distance is calculated by trigonometric function, that is, the rebound angle of the paper and paper-based composite material sample after bending, that is, its degree of forming, and the value is presented on the output device.

6. A method for determining folding forming parameters of paper and paper-based composite materials, characterized in that: The method is implemented by using the device for measuring the folding forming degree parameters of paper and paper-based composite materials as described in claim 3, and comprises the following steps: B1: Take a sample of paper or paper-based composite material to be tested, make the sample according to the standard size, and set a readable cursor on the longitudinal edge of the portion to be bent of the sample, and then place the sample on the testing platform (6), wherein the portion to be bent is suspended outside the testing platform (6), and the fixed portion is integrally attached to the testing platform (6); B2: The fixed end of the paper or paper-based composite material sample is pressed by a pressing plate (72), and at the same time, a laser reader (14) fixed on a bracket (12) that can rotate around the detection platform (6) detects a readable cursor on the sample, and synchronizes the movement of the driving member and the sample. At the same time, a gyro positioner (15) connected to the bracket (12) also rotates synchronously with the bracket (12); B3: According to the angle requirement of the measurement, the inclination angle value of the left end plate of the detection platform (6) is adjusted to the required degree, and the angles of other corresponding components are also adjusted synchronously, and then closed to isolate interference; B4: The bending mechanism (8) works to vertically bend the paper or paper-based composite material sample along the contact line between the paper and the edge of the detection platform (6) by the vertical bending mold (82). During the bending process, the vertical bending mold (82) always keeps in contact with the left end plate of the detection platform (6); and the bracket (12) and the gyro positioner (15) rotate along with the movement of the sample; B5: After the vertical bending mold (82) is recovered, the forming mechanism (9) works, and the transverse pressing plate (92) thereon extends toward the bent paper and paper-based composite material sample, pressing it against the left end plate of the detection platform (6) and maintaining a constant pressure for 5-10 seconds, after which the transverse pressing plate (92) is retracted; B6: The bent and formed paper and paper-based composite material samples rebound naturally. After the rebound stabilizes, the laser reader (14) locks the readable cursor on the sample and transmits the tilt state of the bent portion of the sample to the gyro positioner (15) through the positioned bracket (12), which measures the accurate angle and transmits the value to the output device for presentation.

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