A detection device for corrugated board

Abstract

The utility model discloses a detection device for corrugated paperboard, including work table, work table top is provided with the support installation box, and the support installation box longitudinal both sides inner surface between slide connection has the removal support board along the transverse, and the support installation box top inner surface slide connection has two opposite settings L type adsorption board along the longitudinal, and the support installation box top has the test openwork, and the support installation box top one end is provided with vacuum pump. The utility model has the beneficial effects that: the utility model fixes the corrugated paperboard between L type adsorption board through vacuum adsorption, avoids displacement, ensures the accurate test result, and the fixed mounting plate that installs the test pressure head and pressure sensor contact in the test process, and the accurate acquisition pressure sensor numerical change, thereby improves the test precision, and the linear transmission mechanism adjustable removal support board position can be realized in different position test, and replaces different specifications pressure head, and further improves the accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of paperboard testing equipment, specifically a testing device for corrugated paperboard. Background Technology

[0002] Corrugated cardboard is a material with a unique structure. Its corrugated waves resemble interconnected arches, arranged in a row to form a triangular structure. This structure gives corrugated cardboard good mechanical strength and cushioning properties, allowing it to maintain its shape under pressure. As a lightweight and durable packaging material, corrugated cardboard is widely used in many industries.

[0003] Chinese patent CN221351150U discloses a cardboard puncture strength testing device. Its movable component 6 includes a movable rod 61. Through holes are opened around the surface of the lifting seat 4. The surface of the movable rod 61 is inserted and slidably connected to the inner cavity of the through hole of the lifting seat 4. One end of the movable rod 61 is fixedly connected to the upper surface of the fixed seat 7, and the other end of the movable rod 61 is fixedly connected to the limiting block 62. When it comes into contact with the surface of the cardboard, the pressure generated is transmitted to the mounting seat 10 through the pressure-resistant column 11 or the needle column 12. The mounting seat 10 transmits the pressure to the fixed block 8 through the adjustment mechanism 9, so that the fixed block 8 pushes the fixed seat 7 to move. The fixed seat 7 moves towards the surface of the pressure sensor 5 through the movable rod 61, so that the fixed seat 7 squeezes the pressure sensor 5, thereby realizing the pressure resistance detection and puncture strength detection.

[0004] However, in the aforementioned patent, the testing device uses a pressure-resistant column or needle column to test the cardboard. During this process, the fixed base and the components mounted on it apply their own weight to the pressure-resistant column or needle column, pressing it against the cardboard. Since the movable rod is connected to the lifting base, the pressure applied to the cardboard cannot be detected when the pressure sensor is not in contact with the fixed base. This results in an error in the applied detection pressure, leading to inaccurate test results, which requires further development and improvement. Utility Model Content

[0005] The purpose of this invention is to provide a testing device for corrugated cardboard to solve the problem of inaccurate test results from existing corrugated cardboard compressive strength testing equipment.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: A testing device for corrugated cardboard, comprising a workbench, a support mounting box on the top of the workbench, a movable support plate slidably connected between the inner surfaces of the longitudinal sides of the support mounting box, two opposing L-shaped adsorption plates slidably connected along the longitudinal direction on the inner surface of the top of the support mounting box, a test cutout on the top of the support mounting box, a vacuum pump at one end of the top of the support mounting box, a linear transmission mechanism between one end of the movable support plate and the inner surface of the support mounting box, a lifting device at the bottom of the movable support plate, a lifting support plate installed above the movable support plate at the top output end of the lifting device, and a lifting support plate at the top of the lifting support plate. The device includes a pressure sensor, a fixed mounting plate above the pressure sensor, a test pressure head on the top of the fixed mounting plate, and guide rods on both sides of the bottom of the fixed mounting plate along the longitudinal direction of the lifting device. The movable support plate and the lifting support plate are both connected to the guide rods. An air box is located on the top of the L-shaped adsorption plate, and several air holes are equidistantly arranged at the bottom of the L-shaped adsorption plate, all of which are connected to the interior of the air box. An air duct is located at the output end of the vacuum pump, with one end of the duct connected to the interior of the air box. Telescopic devices are located at both ends of the support mounting box corresponding to the L-shaped adsorption plate, with the output end of the telescopic device extending into the inside of the support mounting box and connecting to the L-shaped adsorption plate.

[0007] Furthermore, the workbench and the support mounting box are fixedly connected by welding.

[0008] Furthermore, the support mounting box is provided with observation ports both above and below the movable support plate.

[0009] Furthermore, the linear transmission mechanism includes a transmission motor disposed at the bottom of one end of the movable support plate, a transmission gear being installed at the top output end of the transmission motor extending into the upper part of the movable support plate, and a transmission rack being disposed on the inner surface of the longitudinal side of the support mounting box above the movable support plate, the transmission gear meshing with the transmission rack.

[0010] Furthermore, the fixed mounting plate is connected to the test pressure head by bolts.

[0011] Furthermore, at least two fixing nuts are installed at one end of the guide plug rod extending below the movable support plate.

[0012] Furthermore, a control device is provided at one longitudinal end of the worktable, and the vacuum pump, the transmission motor in the linear transmission mechanism, the lifting device, the pressure sensor, and the telescopic device are all electrically connected to the control device.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: This utility model has a reasonable design, simple and stable structure, and strong practicality. It uses vacuum adsorption to fix the corrugated cardboard between L-shaped adsorption plates, preventing displacement of the cardboard during testing and ensuring the accuracy of the test results. Simultaneously, the telescopic device allows adjustment of the spacing between the L-shaped adsorption plates to test corrugated cardboard of different sizes. Before and during testing, the fixed mounting plate with the test pressure head remains in contact with the pressure sensor, enabling precise measurement of the pressure sensor readings. Based on the difference in readings, the test results are obtained more accurately, improving the accuracy of the corrugated cardboard test results. Furthermore, the linear transmission mechanism allows the movable support plate to be moved to different positions, enabling testing of different locations on the corrugated cardboard. It also allows for the replacement of test pressure heads of different sizes, further improving the accuracy of the corrugated cardboard test results, making it suitable for widespread use. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the left view of the present invention; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 This is a schematic diagram of the cross-sectional structure of the L-shaped adsorption plate in this utility model.

[0015] In the diagram: 1-Workbench, 2-Support mounting box, 3-Moving support plate, 4-L-shaped adsorption plate, 5-Test cutout, 6-Vacuum pump, 7-Linear transmission mechanism, 8-Lifting device, 9-Lifting support plate, 10-Pressure sensor, 11-Fixed mounting plate, 12-Test pressure head, 13-Guide plug rod, 14-Blowbox, 15-Air hole, 16-Telescopic device, 17-Fixing nut, 18-Control device. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Combination Figures 1 to 4 The device shown is for testing corrugated cardboard, including a workbench 1, a support mounting box 2 on the top of the workbench 1, a movable support plate 3 slidably connected between the inner surfaces of the two longitudinal sides of the support mounting box 2, two opposing L-shaped adsorption plates 4 slidably connected along the longitudinal direction on the inner surface of the top of the support mounting box 2, a test cutout 5 on the top of the support mounting box 2, a vacuum pump 6 at one end of the top of the support mounting box 2, a linear transmission mechanism 7 between one end of the movable support plate 3 and the inner surface of the support mounting box 2, a lifting device 8 at the bottom of the movable support plate 3, a lifting support plate 9 installed above the movable support plate 3 at the top output end of the lifting device 8, and a pressure sensor 10 on the top of the lifting support plate 9. A fixed mounting plate 11 is provided above the sensor 10. A test pressure head 12 is provided on the top of the fixed mounting plate 11. Guide plug rods 13 are provided on both sides of the vertical direction of the lifting device 8 at the bottom of the fixed mounting plate 11. The movable support plate 3 and the lifting support plate 9 are plugged into the guide plug rods 13. A wind box 14 is provided on the top of the L-shaped adsorption plate 4. Several air holes 15 are provided at equal intervals at the bottom of the L-shaped adsorption plate 4. The air holes 15 are all connected to the inside of the wind box 14. An air duct is provided at the output end of the vacuum pump 6. One end of the air duct is connected to the inside of the wind box 14. Telescopic devices 16 are provided at both ends of the support mounting box 2 corresponding to the position of the L-shaped adsorption plate 4. The output end of the telescopic device 16 extends into the inside of the support mounting box 2 and connects to the L-shaped adsorption plate 4.

[0019] The workbench 1 and the support mounting box 2 are fixedly connected by welding. This welding connection method features high structural rigidity and strong vibration resistance, ensuring the stability between the workbench and the support mounting box, preventing displacement deviations caused by mechanical stress during testing, and improving the overall stability of the equipment. The support mounting box 2 has observation ports located above and below the movable support plate 3. This double-sided observation port design enables visual monitoring of the equipment's operating status, allowing operators to observe the coordination between the internal transmission mechanism and the test components in real time. This facilitates the rapid detection of abnormalities such as jamming and wear, shortening troubleshooting time. The linear transmission mechanism 7 includes a transmission motor located at the bottom of one end of the movable support plate 3. The top output end of the transmission motor extends into the upper part of the movable support plate 3 and is equipped with a transmission gear. A transmission rack is located on the inner surface of the longitudinal side of the support mounting box 2 above the movable support plate 3. The transmission gear meshes with the transmission rack to move the movable support plate 3 to different lateral positions. Position; The fixed mounting plate 11 and the test head 12 are connected by bolts. The modular bolt connection design enables the test head to be quickly replaced. Different test requirements can be met by interchangeing different specifications of test heads. The replacement time can be controlled within 5 minutes, which significantly improves the equipment utilization rate. One end of the guide plug rod 13 extends into the lower part of the movable support plate 3 and is equipped with at least two fixing nuts 17 to prevent the guide plug rod 13 from detaching from the lifting support plate 9 and the fixed mounting plate 11. A control device 18 is set at one longitudinal end of the worktable 1. The vacuum pump 6, the transmission motor in the linear transmission mechanism 7, the lifting device 8, the pressure sensor 10 and the telescopic device 16 are all electrically connected to the control device 18. A centralized control system is adopted to realize the coordinated control of multiple parameters such as pressure, displacement and vacuum. The pressure control accuracy can be improved to ±0.5%FS through PID algorithm. At the same time, it has overload protection (response time <10ms) and automatic emergency stop function to ensure the safety and reliability of the test process.

[0020] In operation, the spacing between the L-shaped suction plates is adjusted according to the size of the corrugated cardboard to be tested via a telescopic device. A vacuum pump then creates negative pressure within the air box, which is transmitted through ducts to the air vents on the L-shaped suction plates, thus adsorbing and fixing the corrugated cardboard between them. A drive motor engages a transmission gear and rack, causing a moving support plate to slide laterally, adjusting the position of the corrugated cardboard in the testing area. A lifting device adjusts the position of the lifting support plate to ensure the test pressure head is always at the predetermined height and can apply pressure precisely. A pressure sensor on top of the lifting support plate senses changes in pressure applied to the corrugated cardboard in real time and feeds the values ​​back to the control device. Based on these changes, the control system accurately records the compressive strength of the corrugated cardboard and determines its quality. During testing, the pressure sensor monitors the pressure applied by the pressure head in real time. The control device, based on the pressure data from the sensor and changes in the lifting device, precisely adjusts the applied force of the pressure head and controls pressure changes accurately, ensuring accurate pressure variations during the test. Through PID algorithm adjustment, pressure control accuracy can reach ±0.5%FS. If the system detects overload or other abnormalities, the control device can immediately stop the test via emergency stop function to ensure safety. Test results will be summarized and displayed by the control device. Operators can view the test results in real time through the control device and further analyze the compressive strength of the corrugated cardboard as needed. For different specifications of corrugated cardboard, the test pressure head can be replaced as needed to meet diverse testing requirements. Observation ports are set on both sides of the support mounting box, allowing operators to intuitively observe the mechanical movements and testing progress during the test, promptly identify abnormalities, and facilitate maintenance and adjustment. At the same time, the equipment is equipped with overload protection function with a response time of less than 10ms, ensuring the stability and safety of the equipment during testing.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A testing device for corrugated cardboard, comprising a workbench (1), characterized in that: The workbench (1) is provided with a support mounting box (2) on top. A movable support plate (3) is slidably connected between the inner surfaces of the two longitudinal sides of the support mounting box (2) along the transverse direction. Two L-shaped adsorption plates (4) are slidably connected to the inner surface of the top of the support mounting box (2) along the longitudinal direction. The support mounting box (2) has a test cutout (5) on top. A vacuum pump (6) is provided at one end of the top of the support mounting box (2). A linear transmission mechanism (7) is provided between one end of the movable support plate (3) and the inner surface of the support mounting box (2). A lifting device (8) is provided at the bottom of the movable support plate (3). A lifting support plate (9) is installed above the movable support plate (3) at the top output end of the lifting device (8). A pressure sensor (10) is provided at the top of the lifting support plate (9). A fixed mounting plate (11) is provided above the pressure sensor (10). The fixed mounting plate (11) is provided with a test pressure head (12) on the top. The bottom of the fixed mounting plate (11) is provided with guide plug rods (13) on both sides of the vertical direction of the lifting device (8). The movable support plate (3) and the lifting support plate (9) are both plugged into the guide plug rods (13). The L-shaped adsorption plate (4) is provided with a wind box (14) on the top. The bottom of the L-shaped adsorption plate (4) is provided with several air holes (15) at equal intervals. The air holes (15) are all connected to the inside of the wind box (14). The output end of the vacuum pump (6) is provided with an air duct. One end of the air duct is connected to the inside of the wind box (14). The support mounting box (2) is provided with telescopic devices (16) at both ends of the vertical direction corresponding to the position of the L-shaped adsorption plate (4). The output end of the telescopic device (16) extends into the inside of the support mounting box (2) and connects to the L-shaped adsorption plate (4).

2. The detection device for corrugated cardboard according to claim 1, characterized in that: The workbench (1) and the support mounting box (2) are fixedly connected by welding.

3. The detection device for corrugated cardboard according to claim 1, characterized in that: The support mounting box (2) is provided with observation ports both above and below the movable support plate (3).

4. The detection device for corrugated cardboard according to claim 1, characterized in that: The linear transmission mechanism (7) includes a transmission motor located at the bottom of one end of the movable support plate (3). The top output end of the transmission motor extends into the upper part of the movable support plate (3) and is equipped with a transmission gear. The inner surface of the longitudinal side of the support mounting box (2) is provided with a transmission rack located above the movable support plate (3). The transmission gear meshes with the transmission rack.

5. The detection device for corrugated cardboard according to claim 1, characterized in that: The fixed mounting plate (11) and the test head (12) are connected by bolts.

6. The detection device for corrugated cardboard according to claim 1, characterized in that: One end of the guide plug rod (13) extends into the lower part of the movable support plate (3) and is fitted with at least two fixing nuts (17).

7. The detection device for corrugated cardboard according to claim 1, characterized in that: The workbench (1) is equipped with a control device (18) at one longitudinal end. The vacuum pump (6), the transmission motor in the linear transmission mechanism (7), the lifting device (8), the pressure sensor (10) and the telescopic device (16) are all electrically connected to the control device (18).

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