Corrugated board edge pressure strength testing device

Abstract

The invention relates to the technical field of packaging material detection, and discloses a corrugated board edge pressure strength testing device which comprises a bottom plate, U-shaped frames are connected to the two sides of the upper portion of the bottom plate through fixing mechanisms, L-shaped supporting legs are fixed to the two sides of the bottom of the bottom plate, and a lower plate is arranged on the lower portion in each U-shaped frame. A pressure detection system is arranged on the bottom plate under the lower plate, an upper plate is arranged over the lower plate, and telescopic mechanisms are arranged between the two sides of the two side walls above the lower plate and the upper plate. According to the pressure detection system, the high-precision pressure sensor and the special microcontroller are adopted, pressure signals are accurately collected and efficiently processed, the pressure detection precision is smaller than or equal to + / -1%, the edge pressure strength calculation error is smaller than or equal to + / -2%, and the problem that the dispersion degree of detection data of a traditional device is large is effectively solved; the parallelism of the upper plate and the lower plate is doubly guaranteed through the telescopic mechanism and the adjusting mechanism, the sample is uniformly stressed, and the authenticity and reliability of a detection result are further improved.

Description

Technical Field

[0001] This invention relates to the field of packaging material testing technology, and more specifically, to a corrugated cardboard edge crush strength testing device. Background Technology

[0002] Corrugated cardboard, as the most widely used core material in the packaging industry, directly determines the compression resistance, cushioning performance, and transportation stability of cartons through its edge crush strength. During the storage and transportation of goods, cartons need to withstand various loads such as stacking pressure and vibration impact. If the edge crush strength of the corrugated cardboard is insufficient, it can easily lead to deformation and collapse of the cartons, causing damage to the goods. Therefore, accurately testing the edge crush strength of corrugated cardboard is crucial.

[0003] Existing corrugated cardboard edge crush strength testing devices have many technical shortcomings in practical applications, making it difficult to meet the needs of efficient and accurate testing: Low detection accuracy and poor data reliability: Traditional testing devices lack a stable pressure detection and transmission mechanism. The pressure sensor is installed in an unreasonable position and is easily affected by external interference, resulting in distorted pressure signal acquisition. In addition, there is no dedicated signal processing module, which cannot accurately identify the pressure peak and edge crush strength. The test results have a large dispersion and an error of more than ±5%, making it difficult to reflect the true performance of corrugated cardboard.

[0004] The operation is cumbersome and the degree of automation is low: most devices require manual adjustment of the loading speed and loading stroke, and rely on the operator's experience to judge the test endpoint. This is not only labor-intensive, but also prone to poor consistency of test results due to differences in operation. At the same time, test data needs to be recorded and calculated manually, which is inefficient and poses a risk of data recording errors.

[0005] Lack of effective early warning and protection mechanisms: When the pressure exceeds the equipment's bearing capacity limit or the sample is abnormally crushed during the test, the device does not have timely alarm prompts or overload protection functions, which can easily lead to equipment damage or sample splashing, posing safety hazards; and there is no clear end prompt after the test is completed, making it difficult for operators to accurately control the test process.

[0006] Insufficient structural stability affects testing results: The frame and support structure of some devices are poorly designed, which can easily cause shaking and displacement during loading. This results in large deviations in the parallelism between the upper and lower plates, uneven stress on the sample, and local pressure or edge instability, which further exacerbates the error in the test results.

[0007] Low level of visualization and unintuitive testing process: Most existing devices lack real-time data display capabilities, making it impossible for operators to monitor pressure changes and test progress in real time. Key data such as test curves and peak pressures need to be exported and viewed through external devices after the test, which makes it difficult to detect test anomalies in a timely manner.

[0008] To address the above problems, this invention proposes a corrugated cardboard edge crush strength testing device. Summary of the Invention

[0009] In order to overcome the shortcomings of the prior art, the present invention provides a corrugated cardboard edge crush strength testing device to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a corrugated cardboard edge crush strength testing device, comprising a base plate, a U-shaped frame connected to the upper two sides of the base plate by a fixing mechanism, L-shaped supports fixed to the bottom two sides of the base plate, a lower plate disposed inside the U-shaped frame, a pressure detection system disposed on the base plate directly below the lower plate, an upper plate disposed directly above the lower plate, telescopic mechanisms disposed between the upper plate and the upper plate on both sides of the upper upper side wall, and an adjustment mechanism disposed between the upper plate and the U-shaped frame.

[0011] As a preferred embodiment of the present invention, mounting holes are provided on both sides of the bottom of the L-shaped support leg, and positioning bolts are provided in the mounting holes.

[0012] As a preferred embodiment of the present invention, the pressure detection system includes a pressure sensor, a microcontroller, a display screen, and an alarm light. The pressure sensor is fixedly installed on the top of the base plate directly below the lower plate. The microcontroller, the display screen, and the alarm light are fixed to the side wall of the base plate. The signal output terminal of the pressure sensor is connected to the signal input terminal of the microcontroller. The display output terminal of the microcontroller is electrically connected to the display screen, and the alarm output terminal of the microcontroller is electrically connected to the alarm light.

[0013] As a preferred embodiment of the present invention, the microcontroller is configured to acquire pressure sensor signals in real time, identify pressure peaks, calculate edge pressure intensity, and send the peak pressure, real-time pressure, and edge pressure intensity values ​​to the display screen for display.

[0014] As a preferred embodiment of the present invention, the fixing mechanism includes a mounting plate, which is fixed to both sides of the bottom of the U-shaped frame, and the mounting plate is fixedly connected to the base plate by bolts.

[0015] As a preferred embodiment of the present invention, the telescopic mechanism includes a sliding rod and a side plate. The side plate is fixed to the side wall of the upper plate. One end of the sliding rod is fixed above the lower plate, and the other end of the sliding rod passes through the side plate and is fixed with a rod limiting plate. A spring is sleeved on the sliding rod. One end of the spring is fixed above the lower plate, and the other end of the spring is fixed below the side plate.

[0016] As a preferred embodiment of the present invention, sliding holes are provided on both sides of the U-shaped frame, and support rods are fixed on both sides of the upper plate. One end of the support rod passes through the sliding hole and is fixed with a pointer. Scale marks are provided on both sides of the U-shaped frame sidewalls of the sliding hole.

[0017] As a preferred embodiment of the present invention, the adjustment mechanism includes a threaded rod and a nut. The nut is fixed above the U-shaped frame, and the threaded rod is connected to the nut by threads. One end of the threaded rod is rotatably connected above the upper plate, and the other end of the threaded rod extends upward and is fixed with a handle.

[0018] As a preferred embodiment of the present invention, the handle is provided with anti-slip texture.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The pressure detection system of this invention adopts a high-precision pressure sensor and a dedicated microcontroller, which can accurately acquire pressure signals and process them efficiently. The pressure detection accuracy is ≤±1%, and the edge pressure strength calculation error is ≤±2%, which effectively solves the problem of large data dispersion in traditional devices. The parallelism between the upper and lower plates is guaranteed by both the telescopic mechanism and the adjustment mechanism, and the sample is subjected to uniform force, which further improves the authenticity and reliability of the test results.

[0020] 2. This invention allows for precise control of loading speed and stroke through an adjustment mechanism, and the anti-slip design of the handle facilitates force application by the operator; the pressure detection system enables real-time acquisition, automatic processing, and data display of pressure signals, eliminating the need for manual recording and calculation, and promptly alerts the user through an alarm light after the test is completed, reducing the testing time for a single sample to 3-5 minutes, thus significantly improving testing efficiency.

[0021] 3. The device of this invention has a compact and reasonable overall structure design, and the parts are easy to process and maintain. By changing the samples of different specifications, it can be adapted to the edge crush strength test of various types of corrugated cardboard, and can be widely used in various packaging material testing scenarios, making it highly practical. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the front view of a corrugated cardboard edge crush strength testing device according to the present invention; Figure 2 This is a side view of the edge crush strength testing device for corrugated cardboard according to the present invention; Figure 3 This is a side view of the edge crush strength testing device for corrugated cardboard according to the present invention; Figure 4 This is a schematic diagram of the telescopic mechanism of a corrugated cardboard edge crush strength testing device according to the present invention; Figure 5 This is a schematic diagram of the pressure detection system of the corrugated cardboard edge crush strength testing device of the present invention.

[0024] In the diagram: 1. Base plate; 2. L-shaped support leg; 3. Positioning bolt; 4. Mounting hole; 5. Pressure sensor; 6. Microcontroller; 7. Display screen; 8. Alarm light; 9. Telescopic mechanism; 91. Side plate; 92. Slide rod; 93. Spring; 94. Rod limit plate; 10. U-shaped frame; 11. Lower plate; 12. Upper plate; 13. Sliding hole; 14. Threaded rod; 15. Nut; 16. Handle; 17. Support rod; 18. Pointer; 19. Scale mark; 20. Mounting plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1 to 5 As shown, the present invention provides a corrugated cardboard edge crush strength testing device, including a base plate 1, with U-shaped frames 10 connected to the upper two sides of the base plate 1 by a fixing mechanism, and L-shaped legs 2 fixed to the bottom two sides of the base plate 1. The bottom two sides of the L-shaped legs 2 are provided with mounting holes 4, and positioning bolts 3 are provided in the mounting holes 4. The positioning bolts 3 can facilitate the fixing of the L-shaped legs 2. A lower plate 11 is provided at the bottom inside the U-shaped frame 10, and a pressure detection system is provided on the base plate 1 directly below the lower plate 11. An upper plate 12 is provided directly above the lower plate 11. Telescopic mechanisms are provided between the upper plate 12 and the two sides of the upper wall of the lower plate 11. An adjustment mechanism is provided between the upper plate 12 and the U-shaped frame 10.

[0027] The device has a compact and reasonable overall structure, and its parts are easy to process and maintain. By changing the samples of different specifications, it can be adapted to the edge crush strength test of various types of corrugated cardboard, and can be widely used in various packaging material testing scenarios, making it highly practical.

[0028] The pressure detection system includes a pressure sensor 5, a microcontroller 6, a display screen 7, and an alarm light 8. The pressure sensor 5 is fixedly installed on the base plate 1 directly below the lower plate 11. The microcontroller 6, display screen 7, and alarm light 8 are fixed to the side wall of the base plate 1. The signal output terminal of the pressure sensor 5 is connected to the signal input terminal of the microcontroller 6. The display output terminal of the microcontroller 6 is electrically connected to the display screen 7. The alarm output terminal of the microcontroller 6 is electrically connected to the alarm light 8. The microcontroller 6 is configured to acquire pressure sensor signals in real time, identify pressure peaks, calculate edge crush strength, and send the peak pressure, real-time pressure, and edge crush strength values ​​to the display screen 7 for display. The pressure sensor 5 is used to acquire pressure signals during the corrugated cardboard compression process in real time and transmit them to the microcontroller 6. The microcontroller 6 is used to process and calculate the pressure signals and output them to the display screen 7 for real-time display. When the detected pressure reaches a preset threshold or the test is completed, the microcontroller 6 drives the alarm light 8 to issue a warning signal. The microcontroller 6 is also used to trigger overload protection when the pressure exceeds the set upper limit and drive the alarm light 8 to issue an alarm signal.

[0029] The pressure detection system uses a high-precision pressure sensor and a dedicated microcontroller, which ensures accurate pressure signal acquisition and efficient processing. The pressure detection accuracy is ≤±1%, and the edge pressure strength calculation error is ≤±2%, effectively solving the problem of large data dispersion in traditional devices. The parallelism between the upper and lower plates is ensured by both the telescopic and adjustment mechanisms, and the sample is subjected to uniform force, further improving the authenticity and reliability of the test results.

[0030] The fixing mechanism includes a mounting plate 20, which is fixed to both sides of the bottom of the U-shaped frame 10, and the mounting plate 20 is fixedly connected to the base plate 1 by bolts.

[0031] The telescopic mechanism 9 includes a slide rod 92 and a side plate 91. The side plate 91 is fixed to the side wall of the upper plate 12. One end of the slide rod 92 is fixed above the lower plate 11, and the other end of the slide rod 92 passes through the side plate 91 and is fixed with a rod limiting plate 94. A spring 93 is sleeved on the slide rod 92. One end of the spring 93 is fixed above the lower plate 11, and the other end of the spring 93 is fixed below the side plate 91. This telescopic mechanism 9 provides guidance and buffering for the vertical movement of the upper plate 12. The cooperation between the slide rod 92 and the side plate 91 ensures that the upper plate 12 always moves in the vertical direction, avoiding loading. During the process, tilting occurs, ensuring that the parallelism deviation between the upper plate 12 and the lower plate 11 is ≤0.02mm / m, so that the sample is subjected to uniform force. The spring 93 undergoes compression deformation during loading, which can buffer the loading impact force and avoid local damage to the sample due to excessive instantaneous force. After the test, the elastic restoring force of the spring 93 can push the upper plate 12 to automatically reset without manual operation, which improves the ease of use of the device. The rod limit plate 94 can limit the maximum upward stroke of the upper plate 12, prevent the upper plate 12 from disengaging from the adjustment mechanism, and ensure the structural integrity of the device.

[0032] The U-shaped frame 10 has sliding holes 13 on both sides, and the upper plate 12 has support rods 17 fixed on both sides. One end of the support rod 17 passes through the sliding hole 13 and is fixed with a pointer 18. The side walls of the U-shaped frame 10 on both sides of the sliding hole 13 have scale marks 19. This structure is used to display the lifting stroke of the upper plate 12 in real time: when the upper plate 12 moves, it drives the support rod 17 to move synchronously along the sliding hole 13, and the pointer 18 points to the corresponding value on the scale mark 19. The operator can intuitively read the displacement of the upper plate 12 and accurately control the loading stroke. The scale mark 19 has a graduation value of 0.1mm and a measurement range of 0-100mm, ensuring the accuracy of stroke measurement and providing a reference for adjusting test parameters. The sliding hole 13 also provides guidance for the movement of the support rod 17, further enhancing the stability of the movement of the upper plate 12.

[0033] The adjustment mechanism includes a threaded rod 14 and a nut 15. The nut 15 is fixed above the U-shaped frame 10. The threaded rod 14 is connected to the nut 15 by threads. One end of the threaded rod 14 is rotatably connected to the upper plate 12, and the other end of the threaded rod 14 extends upward and is fixed with a handle 16. The handle 16 has anti-slip texture. The adjustment mechanism is used to control the lifting and lowering of the upper plate 12 and the loading pressure. The operator rotates the handle 16 to drive the threaded rod 14 to rotate. By utilizing the threaded engagement between the threaded rod 14 and the nut 15, the rotational motion is converted into a vertical linear motion of the upper plate 12. The rotating handle 16 allows for precise control of the loading process. The anti-slip texture on the handle 16 increases the friction between the hand and the handle, making it easier for the operator to apply force and preventing slippage during rotation. By controlling the rotation speed and number of rotations of the handle 16, the loading speed of the upper plate 12 can be adjusted within the range of 5-20 mm / min, and the loading stroke can be adjusted to meet the testing requirements of different thicknesses and types of corrugated cardboard. The rotating connection between the threaded rod 14 and the upper plate 12 prevents the upper plate 12 from rotating synchronously when the threaded rod 14 rotates, ensuring the stability of the loading direction.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrugated cardboard edge crush strength testing device, comprising a base plate (1), characterized in that: The base plate (1) is connected to the U-shaped frame (10) on both sides above by a fixing mechanism. The base plate (1) is fixed with L-shaped support legs (2) on both sides of the bottom. The U-shaped frame (10) is provided with a lower plate (11) at the bottom. The base plate (1) is provided with a pressure detection system directly below the lower plate (11). The upper plate (12) is provided directly above the lower plate (11). The upper side walls of the lower plate (11) are provided with telescopic mechanisms between the upper plate (12) and the upper plate (12). The upper plate (12) is provided with an adjustment mechanism between the upper U-shaped frame (10) and the upper U-shaped frame (10).

2. The corrugated cardboard edge crush strength testing device according to claim 1, characterized in that: The L-shaped support (2) has mounting holes (4) on both sides of its bottom, and a positioning bolt (3) is installed in the mounting hole (4).

3. The corrugated cardboard edge crush strength testing device according to claim 1, characterized in that: The pressure detection system includes a pressure sensor (5), a microcontroller (6), a display screen (7), and an alarm light (8). The pressure sensor (5) is fixedly installed on the bottom plate (1) directly below the lower plate (11). The microcontroller (6), the display screen (7), and the alarm light (8) are fixed on the side wall of the bottom plate (1). The signal output terminal of the pressure sensor (5) is connected to the signal input terminal of the microcontroller (6). The display output terminal of the microcontroller (6) is electrically connected to the display screen (7). The alarm output terminal of the microcontroller (6) is electrically connected to the alarm light (8).

4. The corrugated cardboard edge crush strength testing device according to claim 3, characterized in that: The microcontroller (6) is configured to acquire pressure sensor signals in real time, identify pressure peaks, calculate edge pressure strength, and send the peak pressure, real-time pressure, and edge pressure strength values ​​to the display screen (7) for display.

5. The corrugated cardboard edge crush strength testing device according to claim 1, characterized in that: The fixing mechanism includes a mounting plate (20), which is fixed on both sides of the bottom of the U-shaped frame (10), and the mounting plate (20) is fixedly connected to the base plate (1) by bolts.

6. The corrugated cardboard edge crush strength testing device according to claim 1, characterized in that: The telescopic mechanism (9) includes a slide rod (92) and a side plate (91). The side plate (91) is fixed to the side wall of the upper plate (12). One end of the slide rod (92) is fixed above the lower plate (11). The other end of the slide rod (92) passes through the side plate (91) and is fixed with a rod limiting plate (94). A spring (93) is provided on the slide rod (92). One end of the spring (93) is fixed above the lower plate (11), and the other end of the spring (93) is fixed below the side plate (91).

7. The corrugated cardboard edge crush strength testing device according to claim 1, characterized in that: The U-shaped frame (10) has sliding holes (13) on both sides of its side walls. The upper plate (12) has support rods (17) fixed on both sides of its side walls. One end of the support rod (17) passes through the sliding hole (13) and is fixed with a pointer (18). The side walls of the U-shaped frame (10) on both sides of the sliding hole (13) have scale marks (19).

8. The corrugated cardboard edge crush strength testing device according to claim 1, characterized in that: The adjustment mechanism includes a threaded rod (14) and a nut (15). The nut (15) is fixed above the U-shaped frame (10). The threaded rod (14) is connected to the nut (15) by threads. One end of the threaded rod (14) is rotatably connected above the upper plate (12). The other end of the threaded rod (14) extends upward and is fixed with a handle (16).

9. The corrugated cardboard edge crush strength testing device according to claim 8, characterized in that: The handle (16) has anti-slip texture on the outside.

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