A paperboard composite tensile strength testing apparatus

Abstract

The equipment table of the application is fixedly installed with a slide rail, two sliding seats are slidably arranged on the slide rail, a clamp is fixedly installed on the sliding seat, the clamp is used for clamping one end of a paperboard sample, a fixing piece is fixedly installed on the slide rail, guide rods are fixedly installed on both sides of the fixing piece, the two guide rods respectively penetrate one of the sliding seats, and a second spring is fixed between the sliding seat and the fixing piece; since the two sliding seats are slidably arranged on the slide rail and are connected with the second spring, when the pulling block pulls the paperboard sample, the paperboard sample will be bent according to its own toughness, and the bending is completed before the pulling block pulls the paperboard sample to perform a tensile test, so that the experimental result is more in line with the actual situation, and the accuracy of the tensile test result is ensured.

Description

Technical Field

[0001] This invention relates to the field of new material testing, specifically to a device for testing the tensile strength of cardboard composite materials. Background Technology

[0002] Paperboard, as a paper-based composite material, is widely used in various industries. Corrugated paperboard is the most common type, usually used to make cardboard boxes. In addition to corrugated paperboard, various new composite paperboards have been developed to meet the different needs of different industries, such as sound-insulating paperboard, fire-resistant paperboard, electrically insulating paperboard, and asphalt-waterproof paperboard.

[0003] In the research and development of various new composite paperboards, tensile strength testing is a crucial step. Existing paperboard tensile strength testing equipment typically uses two clamps to hold the paperboard sample at both ends and then applies tension during testing. However, this test differs significantly from actual usage scenarios. In real-world applications, paperboard, due to its inherent toughness, often deforms before being stretched. Existing equipment cannot simulate this situation, leading to inaccurate test results. Summary of the Invention

[0004] The purpose of this invention is to provide a device for testing the tensile strength of cardboard composite materials to solve the above-mentioned problems.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a paperboard composite material tensile strength testing device, comprising a device platform, a column fixedly installed on the device platform, and an electric lifting platform installed on the column;

[0006] A housing is fixedly installed on the electric lifting platform, and a cylinder is fixedly installed inside the housing. A sliding groove is opened inside the cylinder, and a slider is slidably installed in the sliding groove. A first spring is fixed to the top of the slider, and a tension sensor is fixed to the other end of the first spring. A vertical rod passing through the sliding groove is fixed to the bottom of the slider, and a lifting block is fixed to the bottom of the vertical rod. The cardboard sample to be tested is placed on the lifting block. When the electric lifting platform rises, it drives the lifting block to rise, providing tension to the cardboard sample for tensile testing.

[0007] A slide rail is fixedly installed on the equipment platform, and two slide blocks are slidably arranged on the slide rail. A clamp is fixedly installed on the slide block. A fixing plate is fixed on the slide rail. Guide rods are fixed on both sides of the fixing plate. The two guide rods pass through one of the slide blocks respectively. A second spring is fixed between the slide block and the fixing plate.

[0008] Since the two slide blocks are slidably mounted on the slide rail and connected to the No. 2 spring, when the lifting block lifts the cardboard sample, the cardboard sample will bend according to its own toughness. Only after bending is completed will the lifting block lift it for the tensile test.

[0009] Preferably, the clamp includes a lower clamping block fixed on the slide, an upper clamping block is disposed on the lower clamping block, and a locking head is disposed between the lower clamping block and the upper clamping block. The locking head passes through the upper clamping block and is threadedly engaged with the lower clamping block.

[0010] Preferably, the upper surface of the lower clamping block and the lower surface of the upper clamping block have patterns.

[0011] Preferably, the data measured by the tension sensor is sent to an external control terminal for processing, and the transmission method can be wired, Bluetooth or wireless.

[0012] Preferably, a guide rail is fixedly installed on the column, two sliding blocks are slidably installed inside the guide rail, a screw is installed through the guide rail, the screw is rotatably connected to the guide rail, a knob is fixed to one end of the screw, two opposite threads are provided on the screw, the two threads are respectively threaded to one of the sliding blocks, and a baffle is fixed to one end of the sliding block, the baffle is in contact with the upper surface of the guide rail.

[0013] Preferably, the baffle is on the movement path of the slide. When the slide moves toward the baffle, it will be blocked by the baffle. Since the degree of bending of the cardboard sample is determined by the movement trajectory of the slide, the degree of bending of the cardboard sample after being lifted can be controlled.

[0014] Preferably, a power assembly is installed on the upper part to drive the lifting and lowering movement.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The present invention has a slide rail fixedly installed on the equipment platform, two slide seats are slidably arranged on the slide rail, and a clamp is fixedly installed on the slide seats. The clamp is used to clamp one end of the cardboard sample. A fixing plate is fixed on the slide rail, and guide rods are fixed on both sides of the fixing plate. The two guide rods pass through one of the slide seats respectively. A second spring is fixed between the slide seat and the fixing plate.

[0017] Since the two slide blocks are slidably set on the slide rail and connected to the No. 2 spring, when the lifting block lifts the cardboard sample, the cardboard sample will bend according to its own toughness. Only after bending is completed will the lifting block lift it to conduct the tensile test, making the test results more in line with the actual situation and ensuring the accuracy of the tensile test results.

[0018] 2. A guide rail is fixedly installed on the column. Two sliding blocks are slidably installed inside the guide rail. A screw rod is installed through the guide rail and is rotatably connected to the guide rail. A knob is fixed to one end of the screw rod. Two opposite threads are set on the screw rod. The two threads are respectively threaded to one of the sliding blocks. A baffle is fixed to one end of the sliding block and the baffle is attached to the upper surface of the guide rail.

[0019] The baffle is on the movement path of the slide. When the slide moves toward the baffle, it will be blocked by the baffle. Since the degree of bending of the cardboard sample is determined by the movement trajectory of the slide, the degree of bending of the cardboard sample after being lifted can be controlled.

[0020] 3. Turn the knob to rotate the screw. Due to the threaded connection between the screw and the sliding block, the sliding block moves closer or further apart, thereby causing the baffles to move closer or further apart. This adjusts the distance between the baffles, thus adjusting the degree of curvature of the cardboard sample after it is lifted. This allows for testing experiments with different degrees of curvature, making the experimental samples more comprehensive. Attached Figure Description

[0021] Figure 1 is a first appearance schematic diagram of an embodiment of this application;

[0022] Figure 2 is an enlarged view of point A in Figure 1;

[0023] Figure 3 is a second appearance schematic diagram of an embodiment of this application;

[0024] Figure 4 is a schematic diagram of the slide rail structure;

[0025] Figure 5 is a cross-sectional view of an embodiment of this application.

[0026] In the diagram: 11. Equipment platform; 12. Column; 13. Electric lifting platform; 14. Housing; 15. Slide block; 17. Slide rail; 18. Lower clamping block; 19. Upper clamping block; 20. Locking head; 21. Guide rail; 22. Baffle plate; 23. Vertical rod; 24. Lifting block; 25. Sliding block; 26. Screw; 27. Fixing plate; 28. Guide rod; 29. ​​No. 2 spring; 30. Knob; 31. Slide groove; 32. Slider; 33. No. 1 spring; 34. Tension sensor; 35. Cylinder; 40. Clamp. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments:

[0028] Example 1:

[0029] Referring to Figure 1- Figure 5The aforementioned cardboard composite material tensile strength testing equipment includes a platform 11, a column 12 fixedly installed on the platform 11, and an electric lifting platform 13 installed on the column 12. The electric lifting platform 13 is driven to move up and down by a power component on the column 12.

[0030] A housing 14 is fixedly installed on the electric lifting platform 13. A cylinder 35 is fixedly installed inside the housing 14. A sliding groove 31 is opened inside the cylinder 35. A slider 32 is slidably installed in the sliding groove 31. A first spring 33 is fixed at the top of the slider 32. A tension sensor 34 is fixed at the other end of the first spring 33. A vertical rod 23 that passes through the sliding groove 31 is fixed at the bottom of the slider 32. A lifting block 24 is fixed at the bottom of the vertical rod 23.

[0031] The cardboard sample to be tested is placed on the lifting block 24. When the electric lifting platform 13 rises, it drives the housing 14 to rise, thereby driving the lifting block 24 to rise. The rising of the lifting block 24 provides tension to the cardboard sample, thereby conducting a tensile test. During the rising process of the electric lifting platform 13, the first spring 33 will be stretched. The first spring 33 provides tension to the tension sensor 34. When the tension suddenly decreases, it represents the tension when the cardboard breaks. At this time, the experiment ends.

[0032] A slide rail 17 is fixedly installed on the equipment platform 11. Two slide blocks 15 are slidably arranged on the slide rail 17. A clamp 40 is fixedly installed on the slide block 15. The clamp 40 is used to clamp one end of the cardboard sample. A fixing piece 27 is fixed on the slide rail 17. Guide rods 28 are fixed on both sides of the fixing piece 27. The two guide rods 28 pass through one of the slide blocks 15 respectively. A second spring 29 is fixed between the slide block 15 and the fixing piece 27.

[0033] Since the two slide blocks 15 are slidably mounted on the slide rail 17 and connected to the second spring 29, when the lifting block 24 lifts the cardboard sample, the cardboard sample will bend according to its own toughness. After bending, the lifting block 24 will lift it to conduct the tensile test, making the test results more in line with the actual situation and ensuring the accuracy of the tensile test results.

[0034] The clamp 40 includes a lower clamping block 18 fixed on the slide block 15, an upper clamping block 19 is provided on the lower clamping block 18, and a locking head 20 is provided between the lower clamping block 18 and the upper clamping block 19. The locking head 20 passes through the upper clamping block 19 and is threadedly engaged with the lower clamping block 18.

[0035] In use, unscrew the locking head 20 a certain distance, pull up the upper clamping block 19, insert one end of the cardboard sample between the lower clamping block 18 and the upper clamping block 19, and then tighten the locking head 20 to clamp one end of the cardboard sample through the upper clamping block 19.

[0036] It should be noted that, in order to strengthen the clamping force on the cardboard sample, patterns can be made on the upper surface of the lower clamping block 18 and the lower surface of the upper clamping block 19.

[0037] It should be noted that this application requires an external control terminal for use. The data measured by the tension sensor 34 are all sent to the control terminal for processing. The transmission method can be wired, Bluetooth or wireless.

[0038] Example 2:

[0039] The difference between this embodiment and embodiment one is that a guide rail 21 is fixedly installed on the column 12, two sliding blocks 25 are slidably installed inside the guide rail 21, a screw 26 is installed through the guide rail 21, the screw 26 is rotatably connected to the guide rail 21, a knob 30 is fixed to one end of the screw 26, two opposite threads are provided on the screw 26, the two threads are respectively threaded to one of the sliding blocks 25, and a baffle 22 is fixed to one end of the sliding block 25, the baffle 22 is attached to the upper surface of the slide rail 17;

[0040] The baffle 22 is on the movement path of the slide 15. When the slide 15 moves toward the baffle 22, it will be blocked by the baffle 22. Since the degree of bending of the cardboard sample is determined by the movement trajectory of the slide 15, the degree of bending of the cardboard sample after being lifted can be controlled.

[0041] Furthermore, rotating the knob 30 causes the screw 26 to rotate. Due to the threaded connection between the screw 26 and the sliding block 25, the sliding blocks 25 move closer or further apart, thereby causing the baffles 22 to move closer or further apart, thus adjusting the distance between the baffles 22. This allows for adjustment of the degree of curvature of the cardboard sample after it is lifted, enabling testing experiments with different degrees of curvature and making the experimental samples more comprehensive.

[0042] How to use:

[0043] Manually unscrew the locking head 20, clamp the two ends of the cardboard between the two lower clamping blocks 18 and the upper clamping block 19 respectively, and tighten the locking head 20 to achieve clamping;

[0044] After clamping, manually turn the knob 30 to rotate the screw 26. Due to the threaded connection between the screw 26 and the sliding block 25, the sliding blocks 25 move closer or further apart, thereby causing the baffles 22 to move closer or further apart, thus adjusting the distance between the baffles 22, which in turn adjusts the degree of bending of the cardboard sample after being lifted.

[0045] After adjustment, the electric lifting platform 13 is raised. When the electric lifting platform 13 rises, it drives the housing 14 to rise, thereby driving the lifting block 24 to rise. The lifting block 24 provides tension to the cardboard sample, thereby conducting a tensile test.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the tensile strength of cardboard composite materials, comprising a device platform (11), a column (12) fixedly installed on the device platform (11), and an electric lifting platform (13) installed on the column (12), characterized in that: A housing (14) is fixedly installed on the electric lifting platform (13). A cylinder (35) is fixedly installed inside the housing (14). A groove (31) is opened inside the cylinder (35). A slider (32) is slidably installed inside the groove (31). A first spring (33) is fixed at the top of the slider (32). A tension sensor (34) is fixed at the other end of the first spring (33). A vertical rod (23) that passes through the groove (31) is fixed at the bottom of the slider (32). A lifting block (24) is fixed at the bottom of the vertical rod (23). The cardboard sample to be tested is placed on the lifting block (24). When the electric lifting platform (13) rises, it drives the lifting block (24) to rise, providing tension to the cardboard sample for tensile testing. A slide rail (17) is fixedly installed on the equipment platform (11). Two slide blocks (15) are slidably arranged on the slide rail (17). A clamp (40) is fixedly installed on the slide block (15). A fixing plate (27) is fixed on the slide rail (17). Guide rods (28) are fixed on both sides of the fixing plate (27). The two guide rods (28) pass through one of the slide blocks (15). A second spring (29) is fixed between the slide block (15) and the fixing plate (27). Since the two slide blocks (15) are slidably mounted on the slide rail (17) and connected to the second spring (29), when the lifting block (24) lifts the cardboard sample, the cardboard sample will bend according to its own toughness. After bending, the lifting block (24) will lift it to conduct the tensile test.

2. The tensile strength testing device for cardboard composite materials according to claim 1, characterized in that: The clamp (40) includes a lower clamping block (18) fixed on the slide (15), an upper clamping block (19) is provided on the lower clamping block (18), and a locking head (20) is provided between the lower clamping block (18) and the upper clamping block (19). The locking head (20) passes through the upper clamping block (19) and is threadedly engaged with the lower clamping block (18).

3. The tensile strength testing device for cardboard composite materials according to claim 2, characterized in that: The upper surface of the lower clamping block (18) and the lower surface of the upper clamping block (19) are patterned.

4. The tensile strength testing device for cardboard composite materials according to claim 1, characterized in that: The data measured by the tension sensor (34) are all sent to an external control terminal for processing. The transmission method can be wired, Bluetooth or wireless.

5. The tensile strength testing device for cardboard composite materials according to claim 4, characterized in that: A guide rail (21) is fixedly installed on the column (12). Two sliding blocks (25) are slidably installed inside the guide rail (21). A screw (26) is installed through the guide rail (21). The screw (26) is rotatably connected to the guide rail (21). A knob (30) is fixed at one end of the screw (26). Two opposite threads are provided on the screw (26). The two threads are respectively threaded to one of the sliding blocks (25). A baffle (22) is fixed at one end of the sliding block (25). The baffle (22) fits against the upper surface of the slide rail (17).

6. The tensile strength testing device for cardboard composite materials according to claim 5, characterized in that: The baffle (22) is on the movement path of the slide (15). When the slide (15) moves toward the baffle (22), it will be blocked by the baffle (22).

7. The tensile strength testing device for cardboard composite materials according to claim 6, characterized in that: A power assembly is installed on the (12) to drive the (13) to perform lifting and lowering movements.

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