Device for testing tensile property of composite fiber non-woven fabric

Abstract

The invention relates to the technical field of composite fiber non-woven fabric manufacturing, in particular to a composite fiber non-woven fabric tensile property testing device which comprises a base, and an n-shaped support and a limiting sliding way located under the horizontal section of the n-shaped support are fixedly installed on the upper end face of the base. And a stretching mechanism for stretching the composite fiber non-woven fabric front and back is arranged on the limiting slide way. The tensile property test of the composite fiber non-woven fabric is completed by adopting an integrated operation model of stretching, twisting and extruding, the test reliability is improved by adopting a fixing mode of combining clamping of upper and lower cambered surfaces with matching of a rubber plate, a convex block and a groove, and meanwhile, the tensile property of the composite fiber non-woven fabric is improved through plane stretching, twisting and plane stretching tests after twisting as well as downward extruding and stretching of a middle section. The composite fiber non-woven fabric tensile property testing device can simulate complex stress conditions possibly faced by the composite fiber non-woven fabric in practical application, so that the tensile property of the composite fiber non-woven fabric in multiple stress states is comprehensively evaluated, multiple testing modes are realized on a single device, and the overall testing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite fiber nonwoven fabric manufacturing, in particular to a composite fiber nonwoven fabric tensile performance testing device. Background Art

[0002] Composite fiber non-woven fabric is a non-woven fabric made by combining different types of fiber materials; it usually uses chemical bonding, thermal bonding or mechanical methods to bond the fibers together. Due to its softness, strength, hygroscopicity, waterproofness and other characteristics, it is widely used in medical and health, household products and industrial uses. In the process of producing composite fiber non-woven fabrics, in order to evaluate the performance and service life of the materials under actual use conditions, it is necessary to conduct sampling tensile performance tests on the composite fiber non-woven fabrics to ensure that the products meet the set performance standards and quality requirements, and ensure the consistency and reliability of the products.

[0003] At present, there are the following shortcomings in the tensile performance test of composite fiber non-woven fabrics: 1. When performing a tensile test on a composite fiber non-woven fabric, the two ends of the composite fiber non-woven fabric sample are first clamped and fixed, and then the two ends of the composite fiber non-woven fabric are simultaneously pulled in opposite directions to complete the tensile test of the composite fiber non-woven fabric by judging whether the composite fiber non-woven fabric is torn and deformed. During the above operation, the composite fiber non-woven fabric is only pulled horizontally, and the mechanical properties of the composite fiber non-woven fabric vary significantly in different directions. Only pulling horizontally cannot fully evaluate the overall mechanical properties of the material, and the performance of other positions will be ignored. Performance and potential problems, and in actual applications, materials will be subjected to forces from multiple directions at the same time. Relying only on the data from lateral tests will lead to misjudgment of the performance of the material under actual use conditions; 2. During the tensile test, the two ends of the composite fiber non-woven fabric are usually fixed by plane clamping, but plane clamping will cause the stress of the material to concentrate in the clamping area, especially in the case of uneven clamping, resulting in premature fracture of the material near the clamping point rather than at the natural fracture point of the material, and if the clamping force is insufficient or the clamping surface does not have sufficient friction, the material may slip during the test, resulting in inaccurate test results. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a composite fiber nonwoven fabric tensile performance testing device, which is achieved by the following specific technical means:

[0005] A tensile property testing device for composite fiber non-woven fabric, comprising a base. On the upper end surface of the base, a U-shaped bracket and a limiting slideway located directly below the horizontal section of the U-shaped bracket are fixedly installed. A stretching mechanism for stretching the composite fiber non-woven fabric back and forth is arranged on the limiting slideway. The stretching mechanism includes a driving part arranged on the limiting slideway, an execution part cooperating with the driving part, a fixing part for fixedly clamping both ends of the composite fiber non-woven fabric arranged on the execution part, and a friction part for increasing the fixing friction force to keep the fixing part stably clamping the composite fiber non-woven fabric arranged on the fixing part.

[0006] A torsion mechanism for cooperating with the stretching mechanism to conduct torsion testing and post-torsion stretching testing on the composite fiber non-woven fabric is arranged on the base. The torsion mechanism includes a synchronization part arranged on the base, and a rotating part for synchronously reversing both ends of the composite fiber non-woven fabric in cooperation with the synchronization part arranged on the execution part.

[0007] An extrusion mechanism for respectively cooperating with the stretching mechanism and the torsion mechanism and for conducting extrusion stretching testing after stretching and extrusion stretching testing after torsion on the composite fiber non-woven fabric is arranged on the U-shaped bracket. The extrusion mechanism includes an extrusion part arranged on the U-shaped bracket, a locking part arranged on the extrusion part, and a cooperating part arranged on the base for cooperating with the locking part to fix the execution part on the base.

[0008] As a preferred technical solution of the present invention, the driving part includes a support sliding seat, a bidirectional screw, a first motor and a support seat. Support sliding seats that are symmetrically arranged front and back are slidably installed on the limiting slideway. A bidirectional screw located in the limiting slideway is installed through the base by means of a bearing. The support sliding seats that are symmetrically arranged front and back are threadedly connected to the bidirectional screw. The base is fixedly installed with a first motor whose output end is fixedly connected to the bidirectional screw. The upper end surface of the support sliding seat is fixedly installed with a support seat.

[0009] As a preferred technical solution of the present invention, the execution part includes a central rotating shaft, a fixed seat, a first arc-shaped plate and a shaft rod. The central rotating shaft is installed through the center of the upper end of the support seat by means of a bearing. Fixing seats are fixedly installed at one ends of the central rotating shafts that are symmetrically arranged front and back and are close to each other. A first arc-shaped plate is fixedly installed on one side wall of the fixing seats that are symmetrically arranged front and back and are close to each other. The first arc-shaped plate is composed of horizontal ends on the left and right sides and an arc-shaped end in the center. A shaft rod is fixedly installed on the horizontal end on the left side of the first arc-shaped plate, and symmetrically arranged cooperation screw holes are penetrated on the horizontal end on the right side.

[0010] As a preferred technical solution of the present invention, the fixing part includes a second arc-shaped plate, a screw hole and a locknut bolt. A second arc-shaped plate cooperating with the first arc-shaped plate is mounted on the shaft rod through a bearing. The second arc-shaped plate is the same as the first arc-shaped plate. A screw hole cooperating with the mating screw hole is formed through the horizontal end on the right side of the second arc-shaped plate. A locknut bolt is threadedly connected in the screw hole, and the locknut bolt passes through the screw hole and is threadedly connected with the mating screw hole.

[0011] As a preferred technical solution of the present invention, the friction part includes a mating groove, a triangular convex block and a rubber plate. Rubber plates are fixedly installed on the mutually approaching side walls of the first arc-shaped plate and the second arc-shaped plate. A plurality of mating grooves located between the corresponding rubber plates and the fixing seats are uniformly distributed in an array on the upper end surface of the first arc-shaped plate. Triangular convex blocks corresponding to the mating grooves one by one are fixedly installed on the lower end surface of the second arc-shaped plate.

[0012] As a preferred technical solution of the present invention, the synchronization part includes a rotating cylinder, a spline shaft and a second motor. Rotating cylinders are installed through bearings at the lower ends of the front and rear symmetric support seats. A spline shaft that is spline-fitted with the rotating cylinder is rotatably installed on the upper end surface of the base through a bearing seat provided. A second motor with an output end fixedly connected to the spline shaft is fixedly installed on the upper end surface of the base.

[0013] As a preferred technical solution of the present invention, the rotating part includes a mating rotating shaft, a first belt and a second belt. A mating rotating shaft is installed on the rear end surface of the support seat located at the rear through a bearing. The mating rotating shaft and the corresponding rotating cylinder are connected by a first belt provided. The central rotating shaft located at the rear and the mating rotating shaft are connected by a transmission gear set provided. The central rotating shaft located at the front and the corresponding rotating cylinder are connected by a second belt provided.

[0014] As a preferred technical solution of the present invention, the extrusion part includes a hydraulic cylinder, an extrusion block and a connecting plate. A hydraulic cylinder with a telescopic end passing through the lower end surface of the U-shaped bracket is fixedly installed on the upper end surface of the U-shaped bracket. The telescopic end of the hydraulic cylinder is fixedly installed with an extrusion block, and a connecting plate is fixedly installed on the upper end surface of the extrusion block.

[0015] As a preferred technical solution of the present invention, the locking part includes a fixed horizontal plate, a connecting slider, a sliding cylinder, a support block and a plug rod. A fixed horizontal plate is fixedly installed at one end of the connecting plate away from the extrusion block. A mating slideway is formed on the lower end surface of the fixed horizontal plate. Front and rear symmetric connecting sliders are slidably installed in the mating slideway. A sliding cylinder is fixedly installed on the lower end surface of the connecting slider. A support block is fixedly installed on the side wall of the support seat close to the fixed horizontal plate. A plug rod that is located directly below the corresponding support seat and is slidably connected to the support seat is slidably installed in the support block. A spring is fixedly installed between the plug rod and the support seat.

[0016] As a preferred technical solution of the present invention, the matching portion includes a fixing hole and a plug hole, the supporting slide is provided with a fixing hole located directly below the corresponding plug rod, and the upper end surface of the base is provided with a plug hole matching the fixing hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The composite fiber non-woven fabric tensile performance testing device uses a stretching mechanism, a torsion mechanism and an extrusion mechanism to cooperate with each other, and adopts an integrated operation model of stretching, torsion and extrusion to complete the tensile performance test of the composite fiber non-woven fabric. The upper and lower arc clamping combined with the fixing method of the rubber plate and the protrusion and the groove can evenly distribute the pressure on the surface of the material and improve the test reliability. At the same time, through plane stretching, torsion and plane stretching tests after torsion, as well as downward extrusion stretching in the middle section, the complex stress conditions that the composite fiber non-woven fabric may face in actual applications are simulated, so as to comprehensively evaluate the tensile performance of the composite fiber non-woven fabric under multiple stress states, thereby realizing multiple test methods on a single device and improving the overall efficiency of the test.

[0019] 2. The composite fiber non-woven fabric tensile performance testing device, through the setting of the stretching mechanism, uses the upper and lower arc surfaces to clamp the composite fiber non-woven fabric before the tensile test, and at the same time, the rubber plate, multiple protrusions and grooves cooperate to complete the fixation of the two ends of the composite fiber non-woven fabric. The upper and lower arc surface clamping can make the pressure more evenly distributed on the surface of the material, reducing the risk of premature fracture of the material due to stress concentration, and the rubber plate increases the friction of the clamping, and the cooperation of the protrusion and the groove provides mechanical locking to prevent the test sample from slipping during the test, thereby improving the reliability of the test and ensuring the accuracy of the experiment.

[0020] 3. The composite fiber non-woven fabric tensile performance testing device, through the coordinated use of the set stretching mechanism and the torsion mechanism, implements a test method combining plane stretching and torsion as well as plane stretching after torsion on the composite fiber non-woven fabric to evaluate the tensile performance of the composite fiber non-woven fabric, so as to fully understand the mechanical properties of the material under different stress states, and at the same time reflect the material's ability to resist deformation under complex stress states.

[0021] 4. The composite fiber non-woven fabric tensile performance testing device, through the coordinated use of the torsion mechanism and the extrusion mechanism, performs downward extrusion and stretching on the middle section of the composite fiber non-woven fabric during the plane tensile test and torsion test on the composite fiber non-woven fabric, so as to simulate the complex stress conditions encountered by the material during actual use, and help evaluate the real tensile performance of the material under multiple stresses, so as to further evaluate the various stress performance of the material, so as to obtain more comprehensive material mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional structural schematic diagram when the present invention is working.

[0023] Figure 2 This is a partial sectional three-dimensional structural schematic diagram of the extrusion mechanism of the present invention.

[0024] Figure 3 is Figure 2 The enlarged structural schematic diagram of part A in

[0025] Figure 4 This is a three-dimensional structural schematic diagram of the stretching mechanism and the torsion mechanism of the present invention.

[0026] Figure 5 is Figure 4 The enlarged structural schematic diagram of part B in

[0027] Figure 6 This is a partial bottom-up three-dimensional structural schematic diagram of the fixing part and the friction part of the present invention.

[0028] In the figure: 1. Base; 2. Limit slideway; 3. U-shaped bracket; 4. Stretching mechanism; 41. Driving part; 411. Support sliding seat; 412. Bi-directional screw; 413. First motor; 414. Support seat; 42. Execution part; 421. Central rotating shaft; 422. Fixed seat; 423. First arc-shaped plate; 424. Shaft rod; 43. Fixing part; 431. Second arc-shaped plate; 432. Screw hole; 433. Anti-loosening bolt; 44. Friction part; 441. Matching groove; 442. Triangular convex block; 443. Rubber plate; 5. Torsion mechanism; 51. Synchronization part; 511. Rotating cylinder; 512. Spline shaft; 513. Second motor; 52. Rotating part; 521. Matching rotating shaft; 522. First belt; 523. Second belt; 6. Extrusion mechanism; 61. Extrusion part; 611. Hydraulic cylinder; 612. Extrusion block; 613. Connecting plate; 62. Locking part; 621. Fixed cross plate; 622. Connecting slider; 623. Sliding cylinder; 624. Support block; 625. Insert rod; 63. Matching part; 631. Fixed hole; 632. Insertion hole. Specific embodiments

[0029] 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.

[0030] Please refer to Figure 1, a tensile property testing device for composite fiber non-woven fabrics, comprising a base 1. A U-shaped bracket 3 is fixedly installed on the upper end surface of the base 1, and a limiting slideway 2 is located directly below the horizontal section of the U-shaped bracket 3. A stretching mechanism 4 for stretching the composite fiber non-woven fabric back and forth is arranged on the limiting slideway 2; the stretching mechanism 4 includes a driving part 41 arranged on the limiting slideway 2, an executing part 42 is arranged on the driving part 41, a fixing part 43 for fixedly clamping both ends of the composite fiber non-woven fabric is arranged on the executing part 42, and a friction part 44 for increasing the fixing friction force to keep the fixing part 43 stably clamping the composite fiber non-woven fabric is arranged on the fixing part 43.

[0031] Please refer to Figure 1 , a torsion mechanism 5 is arranged on the base 1 for cooperating with the stretching mechanism 4 to conduct torsion tests and post-torsion stretching tests on the composite fiber non-woven fabric; the torsion mechanism 5 includes a synchronization part 51 arranged on the base 1, and a rotating part 52 for cooperating with the synchronization part 51 to synchronously reverse both ends of the composite fiber non-woven fabric is arranged on the executing part 42.

[0032] Please refer to Figure 1 and Figure 2 , an extrusion mechanism 6 is arranged on the U-shaped bracket 3 for respectively cooperating with the stretching mechanism 4 and the torsion mechanism 5 to conduct extrusion stretching tests after stretching and extrusion stretching tests after torsion on the composite fiber non-woven fabric; the extrusion mechanism 6 includes an extrusion part 61 arranged on the U-shaped bracket 3, a locking part 62 is arranged on the extrusion part 61, and a cooperating part 63 for cooperating with the locking part 62 to fix the executing part 42 on the base 1 is arranged on the base 1.

[0033] Please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 6 , the driving part 41 includes a support sliding seat 411, a bidirectional screw 412, a first motor 413 and a support seat 414. Support sliding seats 411 that are symmetrically arranged front and back are slidably installed on the limiting slideway 2. A bidirectional screw 412 located inside the limiting slideway 2 is installed through the base 1 by means of bearings. The support sliding seats 411 that are symmetrically arranged front and back are threadedly connected to the bidirectional screw 412. A first motor 413 with an output end fixedly connected to the bidirectional screw 412 is fixedly installed on the base 1, and a support seat 414 is fixedly installed on the upper end surface of the support sliding seat 411.

[0034] Please refer to Figure 1 、 Figure 4 、 Figure 5 and Figure 6The actuator 42 includes a central rotating shaft 421, a fixed seat 422, a first curved plate 423 and a shaft rod 424. The central rotating shaft 421 is installed at the center of the upper end of the support seat 414 through a bearing. The front and rear symmetrical central rotating shafts 421 are fixedly installed at one end close to each other with a fixed seat 422. The side wall of the front and rear symmetrical fixed seats 422 close to each other is fixedly installed with a first curved plate 423. The first curved plate 423 consists of horizontal ends on left and right sides and an arc surface end in the center. The shaft rod 424 is fixedly installed on the horizontal end on the left side of the first curved plate 423, and the horizontal end on the right side is penetrated with front and rear symmetrical matching screw holes.

[0035] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The fixing portion 43 includes a second arc plate 431, a screw hole 432 and an anti-loosening bolt 433. The second arc plate 431 that cooperates with the first arc plate 423 is installed on the shaft rod 424 through a bearing. The second arc plate 431 is the same as the first arc plate 423. A screw hole 432 that cooperates with the matching screw hole is penetrated through the horizontal end of the second arc plate 431 located on the right side. The anti-loosening bolt 433 is threadedly connected to the inner thread of the screw hole 432. The anti-loosening bolt 433 passes through the screw hole 432 and is threadedly connected to the matching screw hole.

[0036] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The friction portion 44 includes a matching groove 441, a triangular protrusion 442 and a rubber plate 443. The rubber plate 443 is fixedly installed on one side wall of the first arc plate 423 and the second arc plate 431 close to each other. A plurality of matching grooves 441 located between the corresponding rubber plates 443 and the fixing seat 422 are evenly distributed in an array on the upper end surface of the first arc plate 423. The triangular protrusions 442 corresponding to the corresponding matching grooves 441 are fixedly installed on the lower end surface of the second arc plate 431.

[0037] During specific work, when it is necessary to test the tensile properties of the composite fiber non-woven fabric sample, first place one end of the composite fiber non-woven fabric on the upper end surface of the first arc plate 423, then rotate the second arc plate 431 with the shaft 424, so that the second arc plate 431 is placed above the first arc plate 423, and then rotate the anti-loosening bolt 433 through the external rotating tool to make it pass through the screw hole 432 and the matching screw hole, so that the second arc plate 431 approaches the first arc plate 423 until the two complete the clamping and fixing of this end of the composite fiber non-woven fabric, and the contact surface of the second arc plate 431 and the first arc plate 423 with the composite fiber non-woven fabric are all the arc surfaces of the middle section, so that the upper and lower arc surfaces clamp and fix the composite fiber non-woven fabric so that the pressure is more evenly distributed on the surface of the material.

[0038] In the process of the second arc plate 431 approaching the first arc plate 423, the upper and lower rubber plates 443 fit the composite fiber non-woven fabric to provide friction for fixing the composite fiber non-woven fabric, and the triangular protrusion 442 presses the composite fiber non-woven fabric into the matching groove 441, thereby increasing the area of ​​clamping the composite fiber non-woven fabric. At the same time, the triangular protrusion 442 cooperates with the matching groove 441 to provide mechanical locking to prevent the test sample from slipping during the test, thereby improving the reliability of the test.

[0039] Subsequently, the above-mentioned clamping and fixing operation is performed on the other end of the composite fiber non-woven fabric to complete the fixation of both ends of the composite fiber non-woven fabric, and then the first motor 413 is started to rotate the bidirectional screw 412, thereby driving the support slides 411 on both sides to move away synchronously, thereby driving the support seats 414 fixing the two ends of the composite fiber non-woven fabric away from each other, thereby pulling the composite fiber non-woven fabric laterally to test its tensile properties in a horizontal state.

[0040] See also Figure 1 , Figure 4 and Figure 6 The synchronization part 51 includes a rotating drum 511, a spline shaft 512 and a second motor 513. The lower ends of the front and rear symmetrical support seats 414 are both installed with the rotating drum 511 through bearings. The upper end surface of the base 1 is rotatably installed with a spline shaft 512 that matches the spline of the rotating drum 511 through a set bearing seat. The upper end surface of the base 1 is fixedly installed with a second motor 513 whose output end is fixedly connected to the spline shaft 512.

[0041] See also Figure 1 , Figure 4 and Figure 6 The rotating part 52 includes a matching rotating shaft 521, a first belt 522 and a second belt 523. The rear end surface of the support seat 414 located on the rear side is equipped with a matching rotating shaft 521 through a bearing. The matching rotating shaft 521 and the corresponding rotating drum 511 are connected by the first belt 522. The central rotating shaft 421 located on the rear side is connected by the matching rotating shaft 521 through a transmission gear set. The central rotating shaft 421 located on the front side and the corresponding rotating drum 511 are connected by the second belt 523.

[0042] During specific operation, after completing the tensile property test of the composite fiber non-woven fabric in the horizontal state, start the second motor 513 to drive the spline shaft 512 to rotate, thereby driving the rotating cylinders 511 on both the front and rear sides to rotate synchronously. The rotating cylinder 511 on the front side will directly drive the central rotating shaft 421 on the front side to rotate through the second belt 523, thereby driving one end of the composite fiber non-woven fabric fixed by the front fixing seat 422 to rotate forward. The rotating cylinder 511 on the rear side will first drive the cooperating rotating shaft 521 to rotate through the first belt 522, and the cooperating rotating shaft 521 will reversely rotate the other end of the composite fiber non-woven fabric through the transmission gear set, thereby twisting the composite fiber non-woven fabric to complete the torsional tensile test of the composite fiber non-woven fabric.

[0043] After twisting the composite fiber non-woven fabric to a certain extent, start the first motor 413 to horizontally and laterally stretch the twisted composite fiber non-woven fabric through the cooperation of the driving part 41 and the executing part 42, thereby evaluating the tensile property of the composite fiber non-woven fabric by implementing a test method combining planar stretching, twisting, and planar stretching after twisting of the composite fiber non-woven fabric.

[0044] Please refer to Figure 1 and Figure 2 , the extrusion part 61 includes a hydraulic cylinder 611, an extrusion block 612, and a connecting plate 613. The hydraulic cylinder 611 with a telescopic end penetrating the lower end surface of the U-shaped bracket 3 is fixedly installed on the upper end surface of the U-shaped bracket 3. The extrusion block 612 is fixedly installed at the telescopic end of the hydraulic cylinder 611, and the connecting plate 613 is fixedly installed on the upper end surface of the extrusion block 612.

[0045] Please refer to Figure 1 , Figure 2 and Figure 3 , the locking part 62 includes a fixed horizontal plate 621, a connecting slider 622, a sliding cylinder 623, a support block 624, and a plug rod 625. The fixed horizontal plate 621 is fixedly installed at one end of the connecting plate 613 away from the extrusion block 612. A cooperating slideway is provided on the lower end surface of the fixed horizontal plate 621, and the symmetrically arranged connecting sliders 622 in the front and rear are slidably installed in the cooperating slideway. The sliding cylinder 623 is fixedly installed on the lower end surface of the connecting slider 622. The support block 624 is fixedly installed on the side wall of the support seat 414 close to the fixed horizontal plate 621. The plug rod 625 located directly below the corresponding support seat 414 and slidably connected to the support seat 414 is slidably installed in the support block 624, and a spring is fixedly installed between the plug rod 625 and the support seat 414.

[0046] Please refer to Figure 1 and Figure 2 , the cooperating part 63 includes a fixing hole 631 and a jacking hole 632. The fixing hole 631 located directly below the corresponding plug rod 625 is provided on the support sliding seat 411, and the jacking hole 632 matching the fixing hole 631 is provided on the upper end surface of the base 1.

[0047] During specific operation, when the stretching mechanism 4 performs a plane stretching test or the torsion mechanism 5 performs a torsion test, the hydraulic cylinder 611 can be started to lower the extrusion block 612, so as to perform downward extrusion and stretching on the middle section of the composite fiber non-woven fabric, thereby simulating the complex stress conditions encountered by the material during actual use, and helping to evaluate the actual tensile performance of the material under multiple stresses.

[0048] In the above test process, if the composite fiber non-woven fabric is torn or deformed beyond recovery after the test, the composite fiber non-woven fabric is unqualified, otherwise it is qualified.

[0049] And during the descent of the extrusion block 612, since the support block 624 moves with the support seat 414, the support seat 414 will move the connecting slider 622 to the corresponding position through the insertion rod 625. Therefore, when the extrusion block 612 descends, it will descend with the fixed cross plate 621 through the connecting plate 613, and under the action of the spring, the insertion rod 625 will be pushed. The insertion rod 625 will pass through the fixing hole 631 and then be inserted into the insertion hole 632, so as to fix the support slide 411 on the base 1, thereby avoiding the support slide 411 from being misaligned when extruding the composite fiber non-woven fabric and causing damage to the bidirectional screw 412, and when the extrusion block 612 continues to descend, the insertion rod 625 will squeeze the spring upward to provide residual material for the descent of the extrusion block 612.

[0050] Working principle: When it is necessary to test the tensile properties of the composite fiber non-woven fabric sample, first place one end of the composite fiber non-woven fabric on the upper end surface of the first arc-shaped plate 423, and continue to clamp and fix the two ends of the composite fiber non-woven fabric through the cooperation of the fixing part 43 and the friction part 44, and then start the first motor 413 to pull the composite fiber non-woven fabric horizontally through the cooperation of the driving part 41 and the execution part 42 to test its tensile properties in the horizontal state.

[0051] After completing the tensile performance test in the horizontal state, start the second motor 513 to twist the composite fiber non-woven fabric through the torsion mechanism 5 to complete the torsion tensile test of the composite fiber non-woven fabric. After the composite fiber non-woven fabric is twisted to a certain extent, start the first motor 413 to perform horizontal transverse stretching on the twisted composite fiber non-woven fabric through the cooperation of the driving unit 41 and the execution unit 42 to comprehensively evaluate the tensile performance of the composite fiber non-woven fabric.

[0052] When the stretching mechanism 4 performs a planar stretching test or the torsion mechanism 5 performs a torsion test, the hydraulic cylinder 611 can be started to lower the extrusion block 612, so as to perform downward extrusion and stretching on the middle section of the composite fiber non-woven fabric, thereby simulating the complex stress conditions encountered by the material during actual use, and helping to evaluate the actual tensile performance of the material under multiple stresses. During this process, the locking portion 62 cooperates with the mating portion 63 to fix the support slide 411 on the base 1.

[0053] In the above test process, if the composite fiber non-woven fabric is torn or deformed beyond recovery after the test, the composite fiber non-woven fabric is unqualified, otherwise it is qualified.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite fiber nonwoven fabric tensile properties testing device, comprising a base (1), characterized in that: The upper end surface of the base (1) is fixedly installed with a U-shaped bracket (3) and a limiting slideway (2) located directly below the horizontal section of the U-shaped bracket (3). A stretching mechanism (4) for stretching the composite fiber non-woven fabric back and forth is arranged on the limiting slideway (2). The stretching mechanism (4) includes a driving part (41) arranged on the limiting slideway (2), an execution part (42) cooperating with the driving part (41), a fixing part (43) for fixedly clamping both ends of the composite fiber non-woven fabric arranged on the execution part (42), and a friction part (44) arranged on the fixing part (43) for increasing the fixing friction force to keep the fixing part (43) stably clamping the composite fiber non-woven fabric. A torsion mechanism (5) is arranged on the base (1) for cooperating with the stretching mechanism (4) to perform a torsion test and a post-torsion stretching test on the composite fiber non-woven fabric. The torsion mechanism (5) includes a synchronization part (51) arranged on the base (1), and a rotating part (52) arranged on the execution part (42) for cooperating with the synchronization part (51) to synchronously reverse both ends of the composite fiber non-woven fabric. An extrusion mechanism (6) is arranged on the U-shaped bracket (3) for respectively cooperating with the stretching mechanism (4) and the torsion mechanism (5) to perform an extrusion stretching test after stretching and an extrusion stretching test after torsion on the composite fiber non-woven fabric. The extrusion mechanism (6) includes an extrusion part (61) arranged on the U-shaped bracket (3), a locking part (62) arranged on the extrusion part (61), and a cooperating part (63) arranged on the base (1) for cooperating with the locking part (62) to fix the execution part (42) on the base (1).

2. A composite fiber nonwoven fabric tensile properties testing device according to claim 1, characterized in that: The driving part (41) includes a support slide seat (411), a bidirectional screw (412), a first motor (413), and a support seat (414). The support slide seats (411) symmetrically arranged front and back are slidably installed on the limiting slideway (2). The bidirectional screw (412) located in the limiting slideway (2) is installed through the base (1) by bearings. The support slide seats (411) symmetrically arranged front and back are threadedly connected to the bidirectional screw (412). The first motor (413) with an output end fixedly connected to the bidirectional screw (412) is fixedly installed on the base (1). The upper end surface of the support slide seat (411) is fixedly installed with the support seat (414).

3. A composite fiber nonwoven fabric tensile properties testing device according to claim 2, characterized in that: The execution part (42) includes a central rotating shaft (421), a fixing seat (422), a first arc-shaped plate (423), and a shaft rod (424). The central rotating shaft (421) is installed through the center of the upper end of the support seat (414) by bearings. Fixing seats (422) are fixedly installed at one ends of the central rotating shafts (421) symmetrically arranged front and back close to each other. A first arc-shaped plate (423) is fixedly installed on one side wall of the fixing seats (422) symmetrically arranged front and back close to each other. The first arc-shaped plate (423) is composed of horizontal ends on the left and right sides and an arc-shaped end in the center. A shaft rod (424) is fixedly installed on the horizontal end on the left side of the first arc-shaped plate (423), and symmetrically arranged cooperation screw holes are formed through the horizontal end on the right side.

4. A composite fiber nonwoven fabric tensile properties testing device according to claim 3, characterized in that: The fixed part (43) includes a second arc-shaped plate (431), a screw hole (432), and a locknut bolt (433). A second arc-shaped plate (431) that cooperates with the first arc-shaped plate (423) is mounted on the shaft rod (424) through a bearing. The second arc-shaped plate (431) is the same as the first arc-shaped plate (423). A screw hole (432) that cooperates with the mating screw hole is formed through the horizontal end on the right side of the second arc-shaped plate (431). A locknut bolt (433) is threadedly connected in the screw hole (432), and the locknut bolt (433) passes through the screw hole (432) and is threadedly connected to the mating screw hole.

5. A composite fiber nonwoven fabric tensile properties testing device according to claim 4, characterized in that: The friction part (44) includes a mating groove (441), a triangular protrusion (442), and a rubber plate (443). Rubber plates (443) are fixedly mounted on the side walls of the first arc-shaped plate (423) and the second arc-shaped plate (431) that are close to each other. A plurality of mating grooves (441) located between the corresponding rubber plates (443) and the fixed seat (422) are evenly distributed in an array on the upper end surface of the first arc-shaped plate (423). Triangular protrusions (442) corresponding to the mating grooves (441) are fixedly mounted on the lower end surface of the second arc-shaped plate (431).

6. A composite fiber nonwoven fabric tensile properties testing device according to claim 2, characterized in that: The synchronization part (51) includes a rotating cylinder (511), a spline shaft (512), and a second motor (513). Rotating cylinders (511) are mounted through bearings at the lower ends of the front and rear symmetric support seats (414). A spline shaft (512) that is spline-fitted with the rotating cylinder (511) is rotatably mounted on the upper end surface of the base (1) through a bearing seat provided. A second motor (513) with an output end fixedly connected to the spline shaft (512) is fixedly mounted on the upper end surface of the base (1).

7. A composite fiber nonwoven fabric tensile properties testing device according to claim 6, characterized in that: The rotating part (52) includes a mating rotating shaft (521), a first belt (522), and a second belt (523). A mating rotating shaft (521) is mounted on the rear end surface of the rear support seat (414) through a bearing. The mating rotating shaft (521) and the corresponding rotating cylinder (511) are connected by a first belt (522) provided. The central rotating shaft (421) at the rear and the mating rotating shaft (521) are connected by a transmission gear set provided. The central rotating shaft (421) at the front and the corresponding rotating cylinder (511) are connected by a second belt (523) provided.

8. The composite fiber nonwoven fabric tensile properties testing device according to claim 1, characterized in that: The extrusion part (61) includes a hydraulic cylinder (611), an extrusion block (612), and a connecting plate (613). A hydraulic cylinder (611) with a telescopic end passing through the lower end surface of the U-shaped bracket (3) is fixedly mounted on the upper end surface of the U-shaped bracket (3). The telescopic end of the hydraulic cylinder (611) is fixedly mounted with an extrusion block (612). A connecting plate (613) is fixedly mounted on the upper end surface of the extrusion block (612).

9. A composite fiber nonwoven fabric tensile properties testing device according to claim 8, characterized in that: The locking portion (62) includes a fixed transverse plate (621), a connecting slider (622), a slide cylinder (623), a support block (624) and an insertion rod (625); a fixed transverse plate (621) is fixedly installed at one end of the connecting plate (613) away from the extrusion block (612); a matching slideway is provided on the lower end surface of the fixed transverse plate (621); a front-to-rear symmetrical connecting slider (622) is slidably installed in the matching slideway; a slide cylinder (623) is fixedly installed on the lower end surface of the connecting slider (622); a support block (624) is fixedly installed on a side wall of the support seat (414) close to the fixed transverse plate (621); an insertion rod (625) located directly below the corresponding support seat (414) and slidably connected to the support seat (414) is slidably installed in the support block (624); a spring is fixedly installed between the insertion rod (625) and the support seat (414).

10. The composite fiber nonwoven fabric tensile property testing device according to claim 2, characterized in that: The matching portion (63) comprises a fixing hole (631) and an insertion hole (632); the supporting slide seat (411) is provided with a fixing hole (631) located directly below the corresponding insertion rod (625); and the upper end surface of the base (1) is provided with an insertion hole (632) matching with the fixing hole (631).

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