Bio-based lining cloth tensile test equipment

Abstract

The invention relates to the technical field of cloth detection, in particular to bio-based lining cloth tensile testing equipment which comprises a testing table, a first testing frame and a second testing frame and further comprises a clamping assembly, a flattening assembly, an air pipe and a stretching assembly. The two motors are connected with the corresponding sleeves respectively, the two clamping assemblies are arranged on the corresponding sleeves respectively, the flattening assembly is arranged between the first testing frame and the second testing frame and connected with the two clamping assemblies, and the flattening assembly comprises a flattening roller. The air pipe is arranged on the flattening assembly, used for conveying airflow and communicated with the flattening roller. According to the invention, through the arrangement of the clamping assembly and the flattening assembly, the effect of horizontally clamping the end part of the tested lining cloth can be realized, the conditions of slipping, loosening and breaking of the end part of the lining cloth during testing are avoided, and the accuracy of a test result is effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cloth detection, in particular to a bio-based lining cloth tensile test equipment. BACKGROUND

[0002] Bio-based lining cloth is a kind of lining cloth material made of renewable biomass resources. In order to meet the use requirements under different conditions, it is necessary to test the tensile resistance of the lining cloth by applying stable tension or pressure to its surface after production, so as to ensure the product quality in actual use.

[0003] Since the lining cloth needs to be woven in a horizontal and vertical interlacing manner during production, the horizontal and vertical tensile resistance of the lining cloth is different. However, the traditional tensile test equipment can only be used in single direction test in horizontal or vertical direction with the cooperation of mechanical sensor, which leads to a large deviation between the test result and the actual tensile resistance effect. In view of the above problems, there are good solutions in the prior art, such as a fabric tensile test equipment with publication number CN111707551B, which can meet the detection needs of single horizontal or vertical tensile resistance, and can also meet the detection needs of horizontal and vertical tensile resistance at the same time, effectively reducing the deviation between the test result and the actual tensile resistance effect of the lining cloth. However, there are still the following defects: since the lining cloth needs to be clamped and fixed at both ends in horizontal or vertical direction during tensile test to avoid slipping and loosening of the two ends of the lining cloth during test, in order to maintain the stability during test, a tooth groove is usually arranged on the clamp to increase the friction between the clamp and the surface of the lining cloth, but it will cause the clamped position of the lining cloth to break, which will also affect the test result.

[0004] Therefore, in order to solve the above problems, a bio-based lining cloth tensile test equipment is provided. SUMMARY

[0005] The present application aims to provide a bio-based lining cloth tensile test equipment, which solves the problem that the clamped part of the lining cloth end will break due to pulling during tensile test, thereby affecting the test result. The clamping assembly and flattening assembly provided can realize the effect of horizontally clamping the end of the tested lining cloth, avoid the end of the lining cloth from slipping, loosening and breaking during test, and effectively ensure the accuracy of the test result.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] The application discloses a kind of bio-based lining cloth tensile test equipment, including test table, test frame one and test frame two, still including clamping component, flattening component, air pipe and stretching component, motor and sleeve are provided on the test frame one and test frame two, two described motor are connected with corresponding sleeve respectively, the clamping component is provided with two and is respectively arranged in corresponding sleeve, the flattening component is arranged between test frame one and test frame two and is connected with two clamping components, the flattening component includes flattening roller, the air pipe is arranged on flattening component for conveying airflow and is communicated with flattening roller, the stretching component is arranged on test table and is connected with test frame two, airflow blows out when passing through clamping component, and the end of lining cloth is blown on clamping component, and when clamping component clamps lining cloth, airflow is discharged through flattening roller and drives flattening roller to continue rotating.

[0008] Preferably, the clamping component includes a placement roller, a pressing plate, a limiting rod and a limiting block, the placement roller is hollow and fixedly sleeved on the corresponding sleeve, the limiting rod is arranged on the sleeve, the limiting block is movably sleeved on the limiting rod, the pressing plate is arranged above the placement roller and fixedly connected with the limiting block, the open end of the sleeve is connected with the flattening component, the side wall of the sleeve is provided with an opening one, the surface of the placement roller is symmetrically arranged with two groups of air outlet holes one, each group of the air outlet holes one is provided with a plurality of air outlet holes one, and the outlet end of the air outlet hole one is inclined towards the end of the sleeve close to the air outlet hole one.

[0009] It can be known that the two ends of the lining cloth need to be clamped and fixed before testing, so as to stretch the lining cloth from the two ends, and in order to avoid the phenomenon that the two ends of the lining cloth slip during the stretching test, the friction of the clamping position needs to be increased, including but not limited to the way of opening a tooth groove on the surface of the clamp, but this will cause the end of the lining cloth to break due to the tooth groove during stretching, thereby affecting the normal progress of the test process, so the present application is adopted. By the placement roller and the pressing plate, the ends of the lining cloth can be clamped between the placement roller and the pressing plate, by the way of conveying air to the inside of the sleeve, the ends of the lining cloth are blown to both ends in the process of flowing out of the air outlet hole, so that the ends of the lining cloth are laid on the placement roller; meanwhile, the placement roller and the pressing plate are driven to rotate by the corresponding motor and sleeve after clamping, the ends of the lining cloth are wound by the placement roller and the pressing plate, which can avoid the phenomenon that the end position of the lining cloth slips during testing, and also can avoid the situation that the clamped position of the lining cloth breaks due to friction, so as to ensure the accuracy of the measurement result on the basis of ensuring the normal progress of the measurement process.

[0010] Preferably, the flattening assembly further comprises a support plate, a support pipe, a four-way pipe and two hoses, the support plate is fixedly arranged on the test table, the support pipe is fixedly arranged on the support plate and one end is closed, the flattening roller is hollow and rotatably arranged on the support pipe, the surface of the support pipe is provided with openings two inside the flattening roller, the four-way pipe is fixedly connected with the opening end of the support pipe, the air pipe and the two hoses are fixedly connected with the four-way pipe, the other ends of the two hoses respectively penetrate into the corresponding sleeves, the end of the flattening roller is circumferentially provided with a plurality of air outlet holes two, the distance between the input end of the air outlet hole two and the edge of the flattening roller is less than the distance between the output end of the air outlet hole two and the edge of the flattening roller.

[0011] It can be known that, due to the soft texture of the lining cloth, the middle position of the lining cloth will drop under the action of its own gravity during clamping of the two ends, resulting in the phenomenon that the lining cloth gathers in the direction perpendicular to the stretching direction during clamping of the two ends, that is, the lining cloth is in an uneven state during stretching, thereby affecting the accuracy of the test result, so the scheme is adopted. By arranging the flattening roller and the support pipe, the flattening roller can support the middle position of the lining cloth when winding the two ends of the lining cloth, so as to avoid the middle position of the lining cloth from dropping under the action of its own gravity; at the same time, when the placing plate and the placing roller are in contact, the air flow conveyed by the air pipe can be discharged through the openings two on the surface of the support pipe and the air outlet holes two at the end of the flattening roller, and the flattening roller can be driven to rotate by the reaction force during discharge, so that the two ends of the lining cloth can be wound while the middle position of the lining cloth is flattened, thereby further ensuring the accuracy of the measurement result.

[0012] Preferably, the stretching assembly comprises an adjustable base, a guide rod, a guide block, a mounting frame, an electric push rod and a U-shaped plate, the adjustable base is arranged on the test table, the guide rod is fixedly arranged on the adjustable base, the guide block is slidingly arranged on the guide rod, the test frame two is fixedly arranged on the guide block, the mounting frame is fixedly arranged on the adjustable base, the electric push rod is fixedly arranged on the mounting frame, and the U-shaped plate is fixedly arranged on the test frame two and connected with the output end of the electric push rod. The adjustable base comprises an electric guide rail, an electric sliding block and a mounting plate, the electric guide rail is fixedly arranged on the test table, the electric sliding block is arranged in cooperation with the electric guide rail, and the mounting plate is fixedly arranged on the electric sliding block. The test frame two and the mounting frame are fixedly arranged on the mounting plate.

[0013] By adopting the above scheme, the position of the test frame two can be adjusted by the adjustable base, so that the tensile resistance effect at different clamping distances can be tested.

[0014] Preferably, the hole diameter of the air outlet hole two decreases linearly from the inside to the outside of the flattening roller.

[0015] By adopting the above scheme, the wind pressure generated at the outlet end of the second air outlet hole can be increased when the airflow flows out through the second air outlet hole, so as to react on the flattening roller under the action of the wind pressure, so that the flattening roller rotates continuously, and the thread on the flattening roller is used as a guide during the rotation of the flattening roller, so as to push the cloth from the middle position to both sides, so as to avoid wrinkles on the surface of the cloth and affect the test results.

[0016] Preferably, the side close to the pressing plate of the placing roller is flat, and the circumferential side of the placing roller when contacting the pressing plate is circular, the limiting rod comprises a rod portion connected with the sleeve and a magnetic block away from the sleeve, the limiting block is a iron block and is sleeved on the rod portion, the first air outlet hole is arranged on the flat surface of the placing roller, and the flat surface of the placing roller is arranged in a frosted manner.

[0017] By adopting the above scheme, the pressing plate can be separated from the placing roller by the magnetic attraction between the magnetic block and the sliding block before the end of the cloth is placed on the placing roller, so as to facilitate the placement of the end of the cloth, and the contact area between the cloth and the placing roller can be increased when the end of the cloth is placed on the flat surface of the placing roller, so as to increase the clamping stability of the placing plate and the placing roller to the cloth, and prevent the cloth from slipping and loosening between the placing roller and the pressing plate during the test.

[0018] Preferably, the sum of the radial cross-sectional areas of the outlet ends of the plurality of second air outlet holes is less than the sum of the radial cross-sectional areas of the two hoses, and the sum of the radial cross-sectional areas of the two hoses is greater than the radial cross-sectional area of the air pipe.

[0019] By adopting the above scheme, before the pressing plate contacts the placing roller, a large amount of airflow is divided into the interiors of the corresponding placing rollers through the two sleeves and finally flows out from the corresponding first air outlet holes, so as to ensure that there is sufficient airflow for the flat laying of the end of the cloth.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1. By arranging the flattening assembly and the clamping assembly, the end of the cloth is pressed tightly by the frosted flat surface of the placing roller and the pressing plate, and is wound and clamped by the motor drive, the combination of flat pressing and winding friction avoids damage to the cloth caused by sharp teeth and grooves under the premise of ensuring that the end of the cloth does not slip and loosen; at the same time, the airflow in the interior of the placing roller blows out from the first air outlet hole, which can actively blow the end of the cloth flat before clamping, further preventing test errors caused by wrinkles on the end.

[0022] 2. The flattening component not only provides physical support for the suspended middle part of the lining during the test, preventing it from falling due to its own weight, but also uses the spiral guide structure on the surface of the flattening roller to continuously push the lining from the middle to both sides when it rotates. This effectively resists the "necking" phenomenon that naturally occurs when the lining is stretched, ensuring that the lining is always in a flat and stretched state for the tensile test, thereby greatly improving the accuracy of the stress test results.

[0023] 3. With the flattening component, after the airflow completes the smoothing assistance to the end of the lining, the obstructed airflow will converge into the interior of the flattening roller and be ejected through the second air outlet. This not only uses the ejected airflow to form an air cushion between the lining and the flattening roller to reduce frictional resistance, but also uses the airflow back force to directly drive the flattening roller to rotate automatically. This ensures that the lining can always avoid wrinkles before separating from the flattening roller, further guaranteeing the accuracy of the test results. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a partial cross-sectional view of the connection structure between the test frame and the corresponding clamping assembly of the present invention;

[0026] Figure 3 This is a schematic diagram of the connection structure between the test platform and the flattening component of the present invention;

[0027] Figure 4 This is an exploded view of the stretching assembly of the present invention;

[0028] Figure 5 This is an exploded view of the clamping assembly of the present invention;

[0029] Figure 6 This is a schematic diagram of a partial connection structure between the flattening roller and the sleeve of the present invention.

[0030] In the diagram: 1. Test bench; 2. Test rack one; 3. Test rack two; 4. Clamping assembly; 41. Placement roller; 411. Air outlet one; 42. Pressure plate; 43. Limiting rod; 431. Rod part; 432. Magnetic block; 44. Limiting block; 5. Flattening assembly; 51. Flattening roller; 511. Air outlet two; 52. Support plate; 53. Support tube; 531. Opening two; 54. Four-way tube; 55. Flexible hose; 6. Air pipe; 7. Tensioning assembly; 71. Adjustable base; 711. Electric guide rail; 712. Electric slider; 713. Mounting plate; 72. Guide rod; 73. Guide block; 74. Mounting frame; 75. Electric push rod; 76. U-shaped plate; 8. Motor; 9. Sleeve; 91. Opening one. Detailed Implementation

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0032] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Figures 1 to 6 The present application provides a kind of bio-based lining cloth tensile test equipment, technical scheme is as follows:

[0033] Specifically, please refer to Figure 1 、 Figure 2 And Figure 5 A kind of bio-based lining cloth tensile test equipment, including test table 1, test frame one 2 and test frame two 3, wherein test frame one 2 is fixedly arranged on test table 1, further include clamping assembly 4, flattening assembly 5, air pipe 6 and stretching assembly 7, motor 8 and sleeve 9 are arranged on test frame one 2 and test frame two 3, two motors 8 are connected with corresponding sleeve 9 respectively, clamping assembly 4 is provided with two and is arranged on corresponding sleeve 9 respectively, clamping assembly 4 includes placing roller 41, pressing plate 42, limiting rod 43 and limiting block 44, placing roller 41 is hollowly arranged and fixedly sleeved on corresponding sleeve 9, limiting rod 43 is arranged on sleeve 9, limiting block 44 is movably sleeved on limiting rod 43, pressing plate 42 is arranged above placing roller 41 and is fixedly connected with limiting block 44, the opening end of sleeve 9 is connected with flattening assembly 5, the side wall of sleeve 9 is provided with opening one 91, the surface of placing roller 41 is symmetrically arrayed with two groups of air outlet holes one 411, each group of air outlet holes one 411 is provided with multiple, the outlet end of air outlet hole one 411 is inclined towards the end of sleeve 9 close to the air outlet hole one 411, the side close to pressing plate 42 of placing roller 41 is arranged in plane, the circumferential side of placing roller 41 and pressing plate 42 when contact is circular, limiting rod 43 includes rod part 431 connected with sleeve 9 and magnetic block 432 away from sleeve 9, limiting block 44 is sleeved on rod part 431 and is iron block, air outlet hole one 411 is arranged on the plane of the surface of placing roller 41, the plane of the surface of placing roller 41 is arranged in frosted form.

[0034] Under the above setting conditions, before testing, pull the two pressing plates 42 upward to be adsorbed with the corresponding limiting blocks 44, so that the two pressing plates 42 are in a state of separation from the corresponding placement rollers 41 in a natural state, place the two ends of the liner cloth to be tested on the surface of the corresponding placement rollers 41, and after laying the two ends of the liner cloth, press the two pressing plates 42 downward to be attached to the corresponding placement rollers 41, start the two motors 8 (both of which are controlled by the PLC controller, so that the two motors 8 can be started and stopped synchronously and the rotation directions of the output shafts are opposite), the output ends of the two motors 8 drive the corresponding sleeves 9 to rotate, since the placement rollers 41 are fixedly sleeved on the sleeves 9, the sleeves 9 will drive the placement rollers 41 to rotate in the process of rotating, and then drive the pressing plates 42 connected with the sleeves 9 through the limiting blocks 44 and the limiting rods 43 to rotate, so as to achieve the effect of simultaneously winding the two ends of the liner cloth, avoiding the situation that the two ends of the liner cloth slip off during the stretching test.

[0035] As an embodiment of the present application, referring to Figure 1 、 Figure 3 and Figure 6 , the flattening assembly 5 is arranged between the test frame one 2 and the test frame two 3, the flattening assembly 5 includes a flattening roller 51, the air pipe 6 is arranged on the flattening assembly 5 for conveying airflow and is in communication with the flattening roller 51, the flattening assembly 5 further includes a support plate 52, a support pipe 53, a four-way pipe 54 and two hoses 55, the support plate 52 is fixedly arranged on the test bench 1, the support pipe 53 is fixedly arranged on the support plate 52 and has a closed end, the flattening roller 51 is hollowly arranged and rotatably sleeved on the support pipe 53, the outer edge height of the flattening roller 51 is less than the outer edge height of the placement roller 41, the two placement rollers 41 are arranged at the same height to avoid the flattening roller 51 from blocking the surface of the liner cloth during the stretching test, the surface of the support pipe 53 is provided with an opening two 531 located inside the flattening roller 51, the four-way pipe 54 is fixedly connected with the opening end of the support pipe 53, the air pipe 6 and the two hoses 55 are fixedly connected with the four-way pipe 54, the other ends of the two hoses 55 are respectively penetrated into the corresponding sleeves 9, the end of the flattening roller 51 is circumferentially provided with a plurality of air outlet holes two 511, the distance between the input end of the air outlet hole two 511 and the edge of the flattening roller 51 is less than the distance between the output end of the air outlet hole two 511 and the edge of the flattening roller 51, the hole diameter of the air outlet hole two 511 decreases linearly from the inside to the outside of the flattening roller 51, the sum of the radial cross-sectional areas of the outlet ends of the plurality of air outlet holes two 511 is less than the sum of the radial cross-sectional areas of the two hoses 55, and the sum of the radial cross-sectional areas of the two hoses 55 is greater than the radial cross-sectional area of the air pipe 6.

[0036] Under the above setting condition, when the air flow is delivered through the air pipe 6, a large amount of air will be delivered into the corresponding sleeve 9 through the two hoses 55 under the action of the radial cross-sectional area of the outlet end of the air outlet hole two 511 and the radial cross-sectional area of the hose 55, and enter the inside of the corresponding placing roller 41 under the action of the sleeve 9 surface opening one 91, and finally be blown out from the air outlet hole one 411 of the surface of the placing roller 41, so that the air flow blows out from the air outlet hole one 411 while flattening the lining cloth placed on the placing roller 41 which has not been pressed by the pressing plate 42 from the middle to the edge position, avoiding the end of the lining cloth from being wrinkled; when the two pressing plates 42 clamp the end of the lining cloth with the corresponding placing plate, the outflow of the air flow from the air outlet hole one 411 is blocked, so that the air flow can only be discharged through the air outlet hole two 511 at the end of the flattening roller 51, at this time, under the action of the hole diameter of the air outlet hole two 511 and the distance between the two ends and the edge of the flattening roller 51, the flattening roller 51 will be driven to rotate by the reaction force of the air flow output, so that the middle position of the flattening roller 51 can be flattened from the middle to both sides on the basis of avoiding falling due to its own gravity, further avoiding the surface of the lining cloth from being wrinkled.

[0037] As an embodiment of the present application, referring to Figure 1 、 Figure 3 and Figure 4 , the stretching assembly 7 is arranged on the test table 1 and connected with the test frame two 3, the stretching assembly 7 includes an adjustable base 71, a guide rod 72, a guide block 73, a mounting frame 74, an electric push rod 75 and a U-shaped plate 76, the adjustable base 71 is arranged on the test table 1, the guide rod 72 is fixedly arranged on the adjustable base 71, the guide block 73 is slidingly arranged on the guide rod 72, the test frame two 3 is fixedly arranged on the guide block 73, the mounting frame 74 is fixedly arranged on the adjustable base 71, the electric push rod 75 is fixedly arranged on the mounting frame 74, and the U-shaped plate 76 is fixedly arranged on the test frame two 3 and connected with the output end of the electric push rod 75, wherein the adjustable base 71 includes an electric guide rail 711, an electric sliding block 712 and a mounting plate 713, the electric guide rail 711 is fixedly arranged on the test table 1, the electric sliding block 712 is arranged in cooperation with the electric guide rail 711, and the mounting plate 713 is fixedly arranged on the electric sliding block 712, and the test frame two 3 and the mounting frame 74 are both fixedly arranged on the mounting plate 713.

[0038] Under the above setting condition, before testing, the mounting plate 713 is moved to the specified position through the electric guide rail 711 and the electric sliding block 712, and during testing, the electric push rod 75 is started, the output end of the electric push rod 75 pushes the U-shaped plate 76 to move, since the U-shaped plate 76 is fixedly arranged on the test frame two 3, the U-shaped plate 76 drives the test frame two 3 to move synchronously in the process of moving, and then the lining cloth is stretched for testing.

[0039] Working principle:

[0040] Before the test starts, the operator first pulls the pressing plate 42 in the clamping assembly 4 upward, and uses the magnetic attraction between the magnetic block 432 at the top end of the limiting rod 43 and the limiting block 44 to keep the pressing plate 42 in a suspended state separated from the placement roller 41. Then, the two ends of the bio-based lining cloth to be tested are placed flat on the surface of the placement roller 41, which is provided with a frosted flat area. At this time, the external air source continuously sends air flow into the sleeve 9 through the air pipe 6, the four-way pipe 54 and the hose 55. The air flow enters the hollow placement roller 41 through the opening one 91 on the side wall of the sleeve 9, and is sprayed out of the air outlet hole one 411 obliquely arranged on the surface of the placement roller 41. The air flow is used to blow the ends of the lining cloth outward to eliminate wrinkles. Then, the operator presses the pressing plate 42 downward to make it adhere to the placement roller 41 to preliminarily compress the lining cloth. The two motors 8 are controlled by the PLC controller to start synchronously and reversely to drive the sleeve 9 to rotate with the placement roller 41 and the pressing plate 42 as a whole. The transition structure of the flat surface and the arc surface of the placement roller 41 is used to wind and clamp the ends of the lining cloth. As the lining cloth is layered and wound on the surface of the placement roller 41, the air outlet hole one 411 is tightly covered by the lining cloth, causing the air flow to be blocked. The blocked air flow is forced to flow back and gather to the flattening assembly 5, enters the fixed support pipe 53 inside through the four-way pipe 54, and then enters the hollow and rotatable flattening roller 51 through the opening two 531 on the surface of the support pipe 53. Finally, the air flow is sprayed out of the air outlet hole two 511 with a linearly decreasing hole diameter from inside to outside at a high speed. The reaction force generated by the air flow spray directly drives the flattening roller 51 to continuously rotate on the support pipe 53. At the same time, the sprayed air flow forms an air cushion between the lining cloth and the flattening roller 51 to greatly reduce the frictional resistance. The rotating flattening roller 51 uses the spiral guide structure on its surface to continuously push the lining cloth in a suspended state from the middle to both sides to flatten it, effectively overcoming the downward falling of the lining cloth due to gravity and the "necking" phenomenon caused by stretching. In the state that the lining cloth is completely flat and stretched, the test frame two 3 is driven to move to a preset test distance suitable for different specifications of the lining cloth through the electric guide rail 711 and the electric sliding block 712 on the adjustable base 71 in the stretching assembly 7 along the guide rod 72. Finally, the electric push rod 75 on the mounting bracket 74 is started to push the U-shaped plate 76 and the connected test frame two 3 to move, and the tension test is carried out on the clamped and flattened bio-based lining cloth to record the relevant test data.

[0041] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tensile strength testing device for bio-based lining fabric, comprising a test platform (1), a first test frame (2), and a second test frame (3), characterized in that: It also includes a clamping assembly (4), a flattening assembly (5), an air tube (6), and a stretching assembly (7). Both test frame one (2) and test frame two (3) are equipped with motors (8) and sleeves (9). The two motors (8) are connected to their respective sleeves (9). Two clamping assemblies (4) are provided and are respectively mounted on their respective sleeves (9). The flattening assembly (5) is located between test frame one (2) and test frame two (3) and is connected to the two clamping assemblies (4). The flattening assembly (5) includes a flattening roller (51). The air pipe (6) is set on the flattening assembly (5) for conveying airflow and is connected to the flattening roller (51). The stretching assembly (7) is set on the test table (1) and connected to the test frame (3). When the airflow is blown out through the clamping assembly (4), it blows the end of the lining cloth to lie flat on the clamping assembly (4). When the clamping assembly (4) clamps the lining cloth and obstructs the airflow, the airflow is discharged through the flattening roller (51) and drives the flattening roller (51) to rotate continuously.

2. The tensile strength testing device for bio-based lining according to claim 1, characterized in that: The clamping assembly (4) includes a placement roller (41), a pressure plate (42), a limiting rod (43), and a limiting block (44). The placement roller (41) is hollow and fixedly sleeved on the corresponding sleeve (9). The limiting rod (43) is set on the sleeve (9). The limiting block (44) is movably sleeved on the limiting rod (43). The pressure plate (42) is set above the placement roller (41) and fixedly connected to the limiting block (44). The open end of the sleeve (9) is connected to the flattening assembly (5). The side wall of the sleeve (9) has an opening (91). The surface of the placement roller (41) has two sets of air outlet holes (411) symmetrically arranged. Each set of air outlet holes (411) has multiple outlets. The outlet end of the air outlet hole (411) is inclined toward the end of the sleeve (9) that is close to the air outlet hole (411).

3. The tensile strength testing device for bio-based lining according to claim 1, characterized in that: The flattening assembly (5) also includes a support plate (52), a support tube (53), a four-way tube (54), and two flexible hoses (55). The support plate (52) is fixedly mounted on the test bench (1). The support tube (53) is fixedly mounted on the support plate (52) and closed at one end. The flattening roller (51) is hollow and rotatably mounted on the support tube (53). The surface of the support tube (53) has an opening (531) located inside the flattening roller (51). The four-way tube (54) The air pipe (6) and the two hoses (55) are fixedly connected to the open end of the support pipe (53). The air pipe (6) and the two hoses (55) are fixedly connected to the four-way pipe (54). The other ends of the two hoses (55) are respectively inserted into the corresponding sleeve (9). The end of the flattening roller (51) has a plurality of air outlet holes (511) arranged in a circular array. The distance between the input end of the air outlet hole (511) and the edge of the flattening roller (51) is smaller than the distance between the output end of the air outlet hole (511) and the edge of the flattening roller (51).

4. The tensile strength testing device for bio-based lining according to claim 1, characterized in that: The tensile assembly (7) includes an adjustable base (71), a guide rod (72), a guide block (73), a mounting frame (74), an electric push rod (75), and a U-shaped plate (76). The adjustable base (71) is mounted on the test bench (1). The guide rod (72) is fixedly mounted on the adjustable base (71). The guide block (73) is slidably mounted on the guide rod (72). The second test frame (3) is fixedly mounted on the guide block (73). The mounting frame (74) is fixedly mounted on the adjustable base (71). The electric push rod (75) is fixedly mounted on the mounting frame (74). The U-shaped plate (76) is fixedly mounted on the second test frame (3) and connected to the output end of the electric push rod (75).

5. The tensile strength testing device for bio-based lining according to claim 3, characterized in that: The diameter of the second air outlet (511) decreases linearly from the inside to the outside of the flattening roller (51).

6. The tensile strength testing device for bio-based lining according to claim 2, characterized in that: The placement roller (41) and the pressure plate (42) are both planar on the side that are close to each other. The circumference of the placement roller (41) when it contacts the pressure plate (42) is circular. The limiting rod (43) includes a rod part (431) connected to the sleeve (9) and a magnetic block (432) away from the sleeve (9). The limiting block (44) is sleeved on the rod part (431) and is an iron block.

7. The tensile strength testing device for bio-based lining according to claim 2, characterized in that: The air outlet (411) is located on the plane of the surface of the placement roller (41), and the plane of the surface of the placement roller (41) is frosted.

8. The tensile strength testing device for bio-based lining according to claim 3, characterized in that: The sum of the radial cross-sectional areas of the outlet ends of the plurality of air outlets (511) is less than the sum of the radial cross-sectional areas of the two hoses (55), and the sum of the radial cross-sectional areas of the two hoses (55) is greater than the radial cross-sectional area of ​​the air pipe (6).

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