Strength testing device for pressure-resistant composite paperboard

Abstract

The utility model relates to the technical field of printing equipment, in particular to a strength testing device for a pressure-resistant composite paperboard, which comprises a working platform, a detection box, a control panel, a clamping component, a mounting block, an electric heating wire and a detection component, clamping assemblies are mounted on the inner walls of the left side and the right side of the detection box in a matched mode, and a detection assembly is mounted between the top face and the bottom face of an inner cavity of the detection box in a matched mode; according to the strength testing device for the pressure-resistant composite paperboard, the clamping assembly is arranged in the strength testing device for the pressure-resistant composite paperboard, and all structures in the clamping assembly are matched with one another, so that the device can quickly stop applying pressure to the paperboard when touching the paperboard in the paperboard clamping process, and the paperboard is prevented from being excessively extruded when being clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a strength testing device for pressure-resistant composite cardboard. Background Technique

[0002] As a commonly used packaging material, the strength of cardboard is an important indicator to evaluate its performance; the strength test of cardboard mainly includes various parameters such as edge crush strength, bursting strength, and puncture strength; the core purpose of these test items is to evaluate the strength and stability of cardboard when it is subjected to pressure at the edge, as well as its ability to resist rupture and puncture; among them, the strength testing device for pressure-resistant composite cardboard is an instrument specifically used to detect the pressure-resistant performance of cardboard or other packaging materials, specifically a cardboard compressive strength testing machine;

[0003] In the existing utility model patent, a printing cardboard compressive strength tester (publication number: CN210221703U) is provided with gaskets on the side of the clamping plate away from the electric telescopic rod to increase the surface friction force, making the clamping more stable;

[0004] Although the existing scheme can improve the stability of the cardboard during processing, when clamping the cardboard through the hydraulic telescopic rod, only the staff can subjectively control the hydraulic telescopic rod to clamp the cardboard. However, when manually controlling the operation of the hydraulic telescopic rod, when clamping the cardboard, it is impossible to stop in time, which may cause excessive pressure on the cardboard when clamping the cardboard, and then lead to inaccurate test results. Therefore, a strength testing device for pressure-resistant composite cardboard is needed to improve the above problems. Content of the Utility Model

[0005] In order to solve the problem that when manually controlling the operation of the hydraulic telescopic rod of the existing device, when clamping the cardboard, it is impossible to stop in time, which may cause excessive pressure on the cardboard when clamping the cardboard, and then lead to inaccurate test results, the utility model provides a strength testing device for pressure-resistant composite cardboard to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A strength testing device for pressure-resistant composite cardboard includes a working platform, a detection box, a control panel, a clamping assembly, a mounting block, a heating wire, and a detection assembly. The detection box is installed on the top surface of the working platform, and the clamping assemblies are respectively installed on the left and right inner walls of the detection box in a matching manner. The detection assembly is installed between the top and bottom inner cavities of the detection box in a matching manner;

[0008] The clamping assembly includes a first hydraulic telescopic rod, and the first hydraulic telescopic rods are respectively installed on the left and right inner walls of the detection box cavity;

[0009] Mounting plates are respectively installed on the mutual telescopic axes of the two first hydraulic telescopic rods;

[0010] Connecting columns are respectively installed at the four corners of one side of the two mounting plates close to each other, and a clamping plate is slidably installed between the four connecting columns on the same mounting plate;

[0011] First springs are respectively installed at four corners of one side of the clamping plate close to the mounting plate, and one end of the four first springs away from the clamping plate is respectively connected to the side wall of the mounting plate;

[0012] The middle part of the upper and lower side walls of the mounting plate are respectively provided with mounting grooves, and sliding frames are respectively installed in the two mounting grooves. A circular plate is slidably installed in the inner cavity of the sliding frame, and a connecting rod is installed on the side of the circular plate close to the clamping plate, and the side of the connecting rod away from the circular plate is connected to the clamping plate;

[0013] A sliding rod is slidably mounted on one end of the sliding frame away from the connecting rod, a third pressure sensor is mounted on one end of the sliding rod located in the inner cavity of the sliding frame, a second spring is mounted on one side of the third pressure sensor away from the circular plate, and an end of the second spring away from the third pressure sensor is connected to the inner wall of the sliding frame;

[0014] Baffles are respectively installed on one side of the four connecting columns away from the mounting plate.

[0015] As a preferred solution of the utility model, the four connecting columns are respectively located in the inner cavities of the corresponding first springs, and the sliding rod is located inside the second spring.

[0016] As a preferred solution of the utility model, the detection assembly includes a second hydraulic telescopic rod and a placement plate. The second hydraulic telescopic rod is installed at the center position of the top surface of the inner cavity of the detection box. A pressure plate is installed at the end of the telescopic shaft of the second hydraulic telescopic rod. A second pressure sensor is embedded in the middle of the side of the pressure plate away from the second hydraulic telescopic rod.

[0017] As a preferred solution of the utility model, a placement plate is installed in the middle of the bottom surface of the inner cavity of the detection box, and a first pressure sensor is embedded and installed in the center position of the top surface of the placement plate.

[0018] As a preferred solution of the present utility model, the perpendicular bisector of the first pressure sensor in the vertical direction coincides with the perpendicular bisector of the second pressure sensor in the vertical direction.

[0019] As a preferred solution of the utility model, a closing door is rotatably installed above the outer wall of the opening of the working platform through hinges, and an observation window is embedded in the side wall of the closing door.

[0020] As a preferred embodiment of the present utility model, mounting blocks are respectively installed at the four corners of the inner walls on the left and right sides of the detection box, and a plurality of heating wires are evenly distributed between two mutually corresponding upper and lower mounting blocks.

[0021] As a preferred embodiment of the present utility model, a control panel is installed on one side of the top surface of the working platform, and a humidity sensor is installed on the top surface of the inner cavity of the detection box.

[0022] Compared with the prior art, by providing a clamping assembly in a strength testing device for a pressure-resistant composite cardboard, when the device is in use, the first hydraulic expansion rod drives the mounting plate, the connecting column and the clamping plate to move towards the direction where the cardboard is located. When the clamping plate contacts the cardboard, first, the clamping plate will come into contact with the cardboard. At this time, when the clamping plate continues to move forward, the clamping plate will squeeze the connecting rod and the circular plate to contact the third pressure sensor. When the third pressure sensor is subjected to pressure, it will quickly transmit a signal to the control panel, and the control panel will control the first hydraulic expansion rod to stop working, achieving the advantage that when the device clamps the cardboard, it can quickly stop applying force to the cardboard when it touches the cardboard, avoiding over-squeezing the cardboard when clamping the cardboard. When the prior art device manually controls the operation of the hydraulic expansion rod, it cannot stop in time when clamping the cardboard, which may result in excessive pressure being applied to the cardboard when clamping the cardboard, thereby leading to inaccurate measurement results.

[0023] Compared with the prior art, by providing a detection box, a closing door, mounting blocks and heating wires in a strength testing device for a pressure-resistant composite cardboard, during the use of the device, it is convenient to provide a stable detection environment, and the humidity in the detection box can be reduced by the heating wires, providing an ideal dry environment for detecting the cardboard, avoiding the problem that the environmental humidity affects the detection data of the cardboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 is a schematic cross-sectional structure diagram of the present utility model;

[0026] Figure 3 is an exploded structure diagram of the clamping assembly of the present utility model;

[0027] Figure 4 is a schematic installation structure diagram of the third pressure sensor of the present utility model;

[0028] Figure 5 is a schematic top cross-sectional structure diagram of the present utility model.

[0029] In the figure: 1, working platform; 3, detection box; 4, control panel; 5, closing door; 6, clamping assembly; 601, first hydraulic telescopic rod; 602, mounting plate; 603, connecting column; 604, first spring; 605, mounting groove; 606, clamping plate; 607, baffle; 608, sliding frame; 609, second spring; 6010, sliding rod; 6011, third pressure sensor; 6012, connecting rod; 6013, circular plate; 7, detection assembly; 701, second hydraulic telescopic rod; 702, pressing plate; 703, second pressure sensor; 704, placing plate; 705, first pressure sensor; 8, humidity sensor; 9, mounting block; 10, heating wire; 11, observation window. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment: Please refer to Figures 1 - 5 A strength testing device for a pressure-resistant composite cardboard as shown, including a working platform 1, a detection box 3, a control panel 4, a clamping assembly 6, a mounting block 9, a heating wire 10, and a detection assembly 7. A detection box 3 is installed on the top surface of the working platform 1. Clamping assemblies 6 are respectively and cooperatively installed on the left and right inner side walls of the detection box 3. A detection assembly 7 is cooperatively installed between the top and bottom inner cavities of the detection box 3;

[0032] The clamping assembly 6 includes a first hydraulic telescopic rod 601. First hydraulic telescopic rods 601 are respectively installed on the left and right inner side walls of the inner cavity of the detection box 3;

[0033] Mounting plates 602 are respectively installed on the telescopic shafts of the two first hydraulic telescopic rods 601 that extend and contract with each other;

[0034] Connecting columns 603 are respectively installed at the four corners of the sides of the two mounting plates 602 that are close to each other. A clamping plate 606 is slidably installed between the four connecting columns 603 on the same mounting plate 602;

[0035] First springs 604 are respectively installed at the four corners of the side of the clamping plate 606 close to the mounting plate 602. The ends of the four first springs 604 far from the clamping plate 606 are respectively connected to the side walls of the mounting plate 602;

[0036] The first spring 604 is used to play a buffering role when the clamping plate 606 touches the paperboard, and drives the connecting rod 6012 and the circular plate 6013 to touch the third pressure sensor 6011 to prevent the clamping plate 606 from over-pressing the paperboard;

[0037] The middle part of the upper and lower side walls of the mounting plate 602 are respectively provided with mounting grooves 605, and sliding frames 608 are respectively installed in the two mounting grooves 605. A circular plate 6013 is slidably installed in the inner cavity of the sliding frame 608. A connecting rod 6012 is installed on the side of the circular plate 6013 close to the clamping plate 606, and the side of the connecting rod 6012 away from the circular plate 6013 is connected to the clamping plate 606;

[0038] A sliding rod 6010 is slidably mounted on one end of the sliding frame 608 away from the connecting rod 6012, a third pressure sensor 6011 is mounted on one end of the sliding rod 6010 located in the inner cavity of the sliding frame 608, a second spring 609 is mounted on one side of the third pressure sensor 6011 away from the circular plate 6013, and one end of the second spring 609 away from the third pressure sensor 6011 is connected to the inner wall of the sliding frame 608;

[0039] Baffles 607 are respectively installed on one side of the four connecting columns 603 away from the mounting plate 602;

[0040] The baffle 607 is used to limit the position of the clamping plate 606 to prevent the clamping plate 606 from falling off the outer wall of the connecting column 603 .

[0041] In this embodiment, specific reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The four connecting columns 603 are respectively located in the inner cavities of the corresponding first springs 604 , and the sliding rod 6010 is located inside the second spring 609 .

[0042] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 5 The detection assembly 7 includes a second hydraulic telescopic rod 701 and a placement plate 704. The second hydraulic telescopic rod 701 is installed at the center of the top surface of the inner cavity of the detection box 3. A pressure plate 702 is installed at the end of the telescopic shaft of the second hydraulic telescopic rod 701. A second pressure sensor 703 is embedded and installed in the middle of the side of the pressure plate 702 away from the second hydraulic telescopic rod 701;

[0043] A placement plate 704 is installed in the middle of the bottom surface of the inner cavity of the detection box 3, and a first pressure sensor 705 is embedded and installed in the center of the top surface of the placement plate 704.

[0044] The vertical midline of the first pressure sensor 705 and the vertical midline of the second pressure sensor 703 coincide with each other;

[0045] The detection component 7 is the same as the detection component in the existing utility model patent "A Printing Cardboard Compression Strength Tester Publication No.: CN210221703U", and will not be described in detail here.

[0046] In this embodiment, specific reference Figure 1 A closing door 5 is installed on the upper outer wall of the opening of the working platform 1 through a hinge, and an observation window 11 is embedded in the side wall of the closing door 5;

[0047] The observation window 11 is convenient for the staff to observe the detection process of the detection box 3 .

[0048] In this embodiment, specific reference Figure 1 , Figure 2 and Figure 5 , the four corners of the inner wall on the left and right sides of the detection box 3 are respectively installed with mounting blocks 9, and a plurality of heating wires 10 are evenly distributed between the two mounting blocks 9 corresponding to each other above and below;

[0049] A control panel 4 is installed on one side of the top surface of the working platform 1, and a humidity sensor 8 is installed on the top surface of the inner cavity of the detection box 3;

[0050] The control panel 4 is electrically connected to the heating wire 10, the second hydraulic telescopic rod 701, the first pressure sensor 705, the second pressure sensor 703, the third pressure sensor 6011 and the first hydraulic telescopic rod 601, and processes the data of the second pressure sensor 703, the first pressure sensor 705 and the third pressure sensor 6011, and controls the start and stop of the first hydraulic telescopic rod 601 and the second hydraulic telescopic rod 701;

[0051] The air humidity in the testing box 3 is detected. When the humidity is too high, the electric heating wire 10 is started through the control panel 4 to heat the inside of the testing box 3, providing an ideal dry environment for testing the cardboard, thereby avoiding the problem that the high humidity of the environment affects the cardboard testing data.

[0052] When a strength test device for pressure-resistant composite paperboard is in operation, firstly, all electrical devices in the device are powered on;

[0053] When the device is used, first, the closed door 5 is flipped to open the inner cavity of the detection box 3, and the cardboard to be detected is placed on the top surface of the placement plate 704, and then the clamping assembly 6 is started;

[0054] When the device uses the first hydraulic telescopic rod 601 to drive the mounting plate 602, the connecting column 603 and the clamping plate 606 to move towards the direction where the cardboard is located, when the clamping plate 606 contacts the cardboard, first, the clamping plate 606 will come into contact with the cardboard. At this time, when the clamping plate 606 continues to move forward, the clamping plate 606 will squeeze the connecting rod 6012 and the circular plate 6013 to contact the third pressure sensor 6011. When the third pressure sensor 6011 is under pressure, it will quickly transmit a signal to the control panel 4, and the control panel 4 will control the first hydraulic telescopic rod 601 to stop working. This realizes the advantage that when the device clamps the cardboard and touches the cardboard, it can quickly stop exerting force on the cardboard, avoiding excessive squeezing of the cardboard when clamping the cardboard;

[0055] The humidity sensor 8 detects the air humidity in the detection box 3. When the humidity is too high, the heating wire 10 is started through the control panel 4 to heat the inside of the detection box 3, providing an ideal dry environment for detecting the cardboard, avoiding the problem that the environmental humidity has an impact on the cardboard detection data. Then, the closing door 5 is closed to seal the detection box 3;

[0056] Finally, the cardboard is detected by the detection component 7.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intensity testing device for a pressure-resistant composite cardboard, comprising a working platform (1), a detection box (3), a control panel (4), a clamping assembly (6), a mounting block (9), a heating wire (10) and a detection assembly (7), characterized in that: A detection box (3) is installed on the top surface of the working platform (1), and clamping components (6) are respectively installed on the inner walls on the left and right sides of the detection box (3), and a detection component (7) is installed between the top surface and the bottom surface of the inner cavity of the detection box (3); The clamping assembly (6) comprises a first hydraulic telescopic rod (601), and the first hydraulic telescopic rod (601) is respectively installed on the inner walls on the left and right sides of the inner cavity of the detection box (3); Mounting plates (602) are respectively mounted on the mutually telescopic axes of the two first hydraulic telescopic rods (601); Connecting columns (603) are respectively installed at the four corners of one side close to each other of the two mounting plates (602), and a clamping plate (606) is slidably installed between the four connecting columns (603) on the same mounting plate (602); First springs (604) are respectively installed at four corners of one side of the clamping plate (606) close to the mounting plate (602), and one end of the four first springs (604) away from the clamping plate (606) is respectively connected to the side wall of the mounting plate (602); The middle part of the upper and lower side walls of the mounting plate (602) are respectively provided with mounting grooves (605), a sliding frame (608) is respectively installed in the two mounting grooves (605), a circular plate (6013) is slidably installed in the inner cavity of the sliding frame (608), a connecting rod (6012) is installed on the side of the circular plate (6013) close to the clamping plate (606), and the side of the connecting rod (6012) away from the circular plate (6013) is connected to the clamping plate (606); A sliding rod (6010) is slidably mounted on one end of the sliding frame (608) away from the connecting rod (6012); a third pressure sensor (6011) is mounted on one end of the sliding rod (6010) located in the inner cavity of the sliding frame (608); a second spring (609) is mounted on a side of the third pressure sensor (6011) away from the circular plate (6013); and an end of the second spring (609) away from the third pressure sensor (6011) is connected to the inner wall of the sliding frame (608); Baffles (607) are respectively installed on one side of the four connecting columns (603) away from the mounting plate (602).

2. The strength testing device for a pressure-resistant composite cardboard according to claim 1, characterized in that: The four connecting columns (603) are respectively located in the inner cavities of the corresponding first springs (604), and the sliding rod (6010) is located inside the second spring (609).

3. The strength testing device for a pressure-resistant composite cardboard according to claim 1, characterized in that: The detection assembly (7) comprises a second hydraulic telescopic rod (701) and a placement plate (704); the second hydraulic telescopic rod (701) is installed at the center of the top surface of the inner cavity of the detection box (3); a pressure plate (702) is installed at the end of the telescopic shaft of the second hydraulic telescopic rod (701); and a second pressure sensor (703) is embedded and installed in the middle of a side of the pressure plate (702) away from the second hydraulic telescopic rod (701).

4. The strength testing device for a pressure-resistant composite cardboard according to claim 3, wherein: A placement plate (704) is installed in the middle of the bottom surface of the inner cavity of the detection box (3), and a first pressure sensor (705) is embedded and installed in the center position of the top surface of the placement plate (704).

5. The strength testing device for a pressure-resistant composite cardboard according to claim 4, characterized in that: The perpendicular bisector of the first pressure sensor (705) in the vertical direction coincides with the perpendicular bisector of the second pressure sensor (703) in the vertical direction.

6. The strength testing device for a pressure-resistant composite cardboard according to claim 1, characterized in that: A closing door (5) is rotatably mounted on the upper side of the outer wall of the opening of the working platform (1) via hinges, and an observation window (11) is embedded in the side wall of the closing door (5).

7. The strength testing device for a pressure-resistant composite cardboard according to claim 1, wherein: Mounting blocks (9) are respectively installed at the four corners of the inner walls on the left and right sides of the detection box (3), and a plurality of heating wires (10) are evenly distributed between two mounting blocks (9) corresponding to each other in the upper and lower directions.

8. The strength testing device for a pressure-resistant composite cardboard according to claim 1, characterized in that: A control panel (4) is installed on one side of the top surface of the working platform (1), and a humidity sensor (8) is installed on the top surface of the inner cavity of the detection box (3).

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