Colored spun yarn toughness tester and detection method

Abstract

The invention belongs to the technical field of testing, and particularly relates to a colored spun yarn toughness tester and a detection method.The tester comprises a base and a detection box body, a slidable sliding base and a fixed support are arranged in the detection box body and are each provided with a clamping mechanism, and each clamping mechanism is provided with a roller with a spiral yarn guide groove and an arc-shaped cover plate capable of being opened and closed; the detection box is used for winding and fixing the upper end and the lower end of the colored spun yarn, driving the sliding base to ascend and detecting the drawing force of the colored spun yarn, a rotatable rotating disc is arranged on the side of the detection box, and the outer wall of a fixing rod on the rotating disc is slidably sleeved with a ceramic roller and a friction roller. According to the device, the ceramic roller is used for carrying out bending detection on the colored spun yarn in a stretching state, the working positions of the ceramic roller and the friction roller can be switched through the sub-control mechanism, so that bending resistance detection or surface abrasion resistance detection can be selected, and the device can finish stretching, bending and surface abrasion detection on the colored spun yarn on one device.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and in particular to a colored yarn toughness tester and testing method. Background Technology

[0002] Colored yarn is made by blending and spinning fibers of two or more different colors. The resulting fabrics have unique color-blending effects and visual depth, and are widely used in clothing, home textiles, and other fields. Toughness is one of the core performance indicators of colored yarn, directly affecting its subsequent processing stability and the lifespan of the final product. Toughness testing typically includes multiple dimensions such as tensile strength, bending resistance, and surface abrasion resistance.

[0003] Existing equipment for testing the toughness of spun yarn has many shortcomings: 1. In the tensile testing process, traditional clamping mechanisms often use rigid clamps to directly squeeze and hold the colored yarn. This clamping method is prone to damaging the loose structure of the colored yarn, resulting in local damage to the colored yarn, which in turn affects the accuracy of the tensile test results. At the same time, the clamping force is concentrated at the contact point, making it difficult to achieve stable clamping, and the colored yarn is prone to slippage during the stretching process. 2. Existing toughness tests only measure the force required to break colored yarn when it is stretched in a straight line. However, colored yarn often breaks on knitting machines due to repeated bending and friction from the yarn guide hooks and knitting needles. Therefore, existing equipment cannot simulate this "dynamic friction toughness", resulting in test data being out of touch with actual production. Summary of the Invention

[0004] This invention addresses the technical challenges in testing the toughness of spun yarns. Traditional devices are often single-function, such as only stretching or friction, and cannot integrate multiple modes, leading to cumbersome and inefficient testing. Clamping is prone to loosening, and the fixed bending amplitude does not match actual use. Switching modes requires replacing equipment, increasing costs. To solve these problems, a rotary table and screw linkage was developed to achieve adjustable radial bending. Based on observing the yarn bending stress, friction-driven rotation is prioritized, simplifying amplitude adjustment. Simultaneously, for mode switching, a spring and push rod are separately controlled. The electric push rod retracts to trigger roller displacement, reducing manual intervention and improving operational consistency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A yarn toughness tester, comprising: A base, on top of which a detection box is fixed; The slide and the fixed support are provided. A vertical groove is provided on one side of the detection box. The slide is slidably connected in the vertical groove. The fixed support is fixedly connected through the detection box and located below the slide. Both the slide and the fixed support are provided with clamping mechanisms for clamping colored yarn. The tensile testing assembly includes an electric push rod I fixed inside the testing chamber and a convex plate fixed to one side of the slide block. A pressure sensor is fixedly embedded at the top of the piston rod of the electric push rod I. The pressure sensor is arranged opposite to the bottom of the convex plate and is used to drive the slide block to rise and detect the tensile force on the colored yarn. Two guide rollers are rotatably mounted on one side of the detection box via bearings, and are used to support and guide the colored yarn. A turntable is rotatably connected to one side of the detection box and located between the two guide rollers; A bending mechanism, located inside the detection box, is used to drive a fixed rod connected to the turntable to move, so that the fixed rod performs bending detection on the colored yarn tensioned between the two guide rollers. The control mechanism includes a ceramic roller and a friction roller that are slidably sleeved on the outer wall of the fixed rod. The ceramic roller and the friction roller are fixedly connected. The control mechanism is used to control the ceramic roller or the friction roller to contact the colored yarn in order to perform bending resistance detection or surface wear resistance detection.

[0006] In one possible design, the clamping mechanism includes a roller, two arc-shaped cover plates, and a drive assembly. The roller is slidably connected to a slide block via a slide table. The outer wall of the roller is provided with a spiral yarn guide groove, the cross-sectional depth of which gradually decreases from the yarn inlet end to the tail end, so that the colored yarn wound on it can achieve self-locking. The two arc-shaped cover plates are rotatably connected to the slide block via rotating shafts and are arranged opposite to the roller. The drive assembly includes a motor I, a worm gear, and two worm wheels. The motor I is fixed to one side of the slide, the worm gear is connected to the output shaft of the motor I, and the two worm wheels are respectively fixed to the two rotating shafts and mesh with the worm gear.

[0007] In one possible design, the clamping mechanism further includes a pressure plate, two guide rods are slidably connected to the top of the roller, the pressure plate is fixed to the top of the two guide rods, a magnet I is fixed to the bottom of the pressure plate, and an iron block layer is correspondingly provided on the top of the roller. The pressure plate is driven to move downward by the magnetic attraction between the magnet I and the iron block layer to initially press the colored yarn.

[0008] In one possible design, the bending mechanism includes a screw, a drive seat, an electric push rod II, and a motor II. A sliding groove is provided on one side of the turntable. The screw is rotatably connected to the sliding groove. The drive seat is slidably connected to the sliding groove and threadedly connected to the screw. A fixing rod is fixed to the drive seat. A rubber wheel is fixedly sleeved on the outer wall of the screw. The electric push rod II is fixed inside the detection chamber, and its piston rod extends outside the detection chamber and is fixed with an arc-shaped rubber plate. The motor II is fixed inside the detection chamber, and its output shaft is fixedly connected to the turntable. When the electric push rod II drives the arc-shaped rubber plate to contact the rubber wheel, the turntable rotates and drives the screw to rotate through friction, thereby causing the fixed rod to move along the axis of the screw.

[0009] In one possible design, the control mechanism further includes multiple fixed sleeves, an annular plate, push rods, and springs. The multiple fixed sleeves are fixed to one side of the detection box. The annular plate is slidably connected to the detection box via multiple fixed sleeves that are slidably fitted onto the fixed sleeves. The annular plate is also fixedly connected to the arc-shaped rubber plate via connecting columns. The turntable has a clearance groove and two rectangular slots communicating with the clearance groove. The two push rods are slidably connected to the two rectangular slots respectively. One end of the push rod is fixedly connected to the ceramic roller, and the other end passes through a movable plate that is slidably connected to the clearance groove and abuts against one side of the annular plate. The spring is disposed between the movable plate and the fixed plate fixed to the push rod. When the electric push rod II retracts, it drives the annular plate to move and releases the thrust on the push rod. The spring pushes the ceramic roller and the friction roller to slide along the fixed rod, so that the friction roller comes into contact with the colored yarn.

[0010] In one possible design, the arc-shaped cover plate has a rubber layer fixed to the side near the roller.

[0011] In one possible design, bases are fixed to the inner walls of the slide and the fixed support on the sides away from each other, and protective boxes are fixed to the sides of the two bases near the detection box. The worm and the two worm wheels are located inside the protective boxes.

[0012] In one possible design, a protective cover is also included, which consists of an arc-shaped cover and two arc-shaped sealing plates. The two arc-shaped sealing plates are fixed to the side of the detection box near the vertical groove. The arc-shaped cover is slidably disposed on the detection box and located between the two arc-shaped sealing plates. A collection box is fixed to the top of the base, and the top of the collection box passes through the arc-shaped sealing plate located below.

[0013] In one possible design, the top of the base is fixed with an operating table for controlling the motor II, electric actuator II, motor I, and electric actuator I.

[0014] A testing method for the toughness of colored spun yarn using a tester, comprising the following steps: S1. Clamping and tensioning: The two ends of the colored yarn are wound through the rollers in the slide and fixed support respectively, so that the colored yarn is placed in the spiral yarn guide groove, and the motor I is started to drive the arc cover plate to close to press the colored yarn; the control panel drives the electric push rod I to extend, pushes the slide to rise to tension the colored yarn, and monitors the tension force value in real time through the pressure sensor. S2, Bending Detection: Control the electric push rod II to extend, so that the arc-shaped rubber plate contacts the rubber wheel on the turntable; start motor II to drive the turntable to rotate, and the rubber wheel rotates by friction with the arc-shaped rubber plate, driving the screw to rotate and the drive seat to move radially, thereby driving the ceramic roller to periodically push and bend the colored yarn tensioned between the two guide rollers, and monitor the tension change during the bending process through the pressure sensor; S3. Surface Wear Detection: Control the retraction of electric push rod II to disengage the arc-shaped rubber plate from the rubber wheel, and release the thrust on the push rod by driving the annular plate through the connecting column; under the action of the spring, the ceramic roller and friction roller slide along the fixed rod axially, switching to the position where the friction roller contacts the colored yarn; start motor II to drive the turntable to rotate, and use the friction roller to continuously rub the colored yarn, and monitor the tension decay during the wear process through the pressure sensor; S4. Test End and Reset: After the test is completed, control the electric push rod I to lower the slide to release the colored yarn, control motor I to reverse and open the arc-shaped cover plate, and remove the colored yarn sample.

[0015] Beneficial effects: In this invention, the clamping mechanism adopts the principle of combining spiral winding and gradually shallow groove, and uses the winch effect to convert axial tension into radial clamping force. The greater the tension, the greater the normal pressure and friction between the colored yarn and the yarn guide groove, forming a self-locking mechanism. This avoids the point-like strong pressure of traditional clamping blocks, disperses the clamping stress, effectively protects the fluffy and fragile surface structure of the colored yarn, and ensures that the test results reflect the true performance of the colored yarn rather than the performance after clamping damage. In this invention, the bending mechanism converts rotational motion into periodic reciprocating motion of the test roller in the radial direction through friction transmission. This allows the bending amplitude of the dyed yarn to change dynamically and continuously during the test, simulating more complex actual stress conditions. By controlling the extension of the electric push rod II, the initial state of the friction transmission can be adjusted, thereby controlling the range of bending amplitude variation. This achieves controllability of the bending test intensity and improves the flexibility and scientific nature of the test. In this invention, the sub-control mechanism achieves mechanical interlocking switching between bending test and wear test modes through the synchronous action of an electric push rod. The switching process is smooth and the positioning is accurate, ensuring that when one mode is working, the execution component of the other mode is completely removed from the working area, avoiding mutual interference, simplifying the operation steps, and improving the multifunctionality and automation of the equipment.

[0016] In this invention, the device integrates tensile performance testing, repeated bending fatigue testing, and surface abrasion resistance testing onto a single platform. Users can continuously perform multiple toughness tests on the same piece of colored yarn sample without changing equipment or repeating clamping. This significantly improves testing efficiency, reduces systematic errors and pre-damage introduced by sample transfer and multiple clamping, and makes the obtained tensile, bending, and abrasion data more correlated and comparable, providing a reliable basis for comprehensively evaluating the toughness of colored yarn. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a colored yarn toughness tester provided by the present invention; Figure 2 This is a three-dimensional exploded structural diagram of the testing box, slide, and fixed support of a colored yarn toughness tester provided by the present invention. Figure 3 This is a three-dimensional exploded structural diagram of the slide block, pressure sensor, and electric push rod I of a colored yarn toughness tester provided by the present invention. Figure 4 A three-dimensional exploded view of the slide block, roller, and slide table of a colored yarn toughness tester provided by the present invention; Figure 5 This is a three-dimensional exploded view of the pressure plate and roller of the colored yarn toughness tester provided by the present invention; Figure 6 A three-dimensional exploded view of the rotating shaft, worm gear, and worm of a colored yarn toughness tester provided by the present invention; Figure 7 A three-dimensional exploded view of the turntable, annular plate, and fixing rod of a colored yarn toughness tester provided by the present invention; Figure 8 This is a three-dimensional cross-sectional view of the annular plate and turntable of a colored yarn toughness tester provided by the present invention. Figure 9 This is a three-dimensional exploded view of the annular plate and the arc-shaped rubber plate of the yarn toughness tester provided by the present invention. Figure 10 A three-dimensional structural diagram of the arc-shaped cover and arc-shaped sealing plate of a colored yarn toughness tester provided by the present invention; Figure 11 This is a three-dimensional exploded view of the arc-shaped cover, arc-shaped sealing plate, and collection box of a colored yarn toughness tester provided by the present invention.

[0018] In the diagram: 1. Base; 2. Detection box; 3. Slide; 4. Fixed support; 5. Electric push rod I; 6. Protruding plate; 7. Pressure sensor; 8. Telescopic slide rail; 9. Slide table; 10. Fixed column; 11. Pressure plate; 12. Guide rod; 13. Magnet I; 14. Roller; 15. Spiral yarn guide groove; 16. Colored yarn; 17. Rotating shaft; 18. Arc-shaped cover plate; 19. Motor I; 20. Worm gear; 21. Worm wheel; 22. Base; 23. Protective box; 24. Motor II; 25. Turntable; 26. Sliding groove; 27. Screw. 28. Fixed rod; 29. ​​Ceramic roller; 30. Friction roller; 31. Guide roller; 32. Rubber wheel; 33. Arc-shaped rubber plate; 34. Electric push rod II; 35. Rectangular groove; 36. Push rod; 37. Clearance groove; 38. Moving plate; 39. Spring; 40. Fixed plate; 41. Annular plate; 42. Fixed sleeve; 43. Fixed sleeve rod; 44. Connecting column; 45. Arc-shaped groove; 46. Arc-shaped closing plate; 47. Arc-shaped cover; 48. Collection box; 49. Operating table; 50. Vertical groove; 51. Magnet II; 52. Drive base. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In one embodiment: Refer to Figure 1 and Figure 9 A colored yarn toughness tester, relating to the field of yarn testing technology, is composed of a support and protection part, a colored yarn 16 clamping part, a tensile testing part, a bending testing part, a mode switching part, and a control part. The base 1 provides a stable installation foundation for the entire device. The base 1 is preferably made of metal plate or heavy profile welded or bolted together. Shock-absorbing pads can be set at its bottom. The test box 2 is fixedly installed on the top of the base 1. The test box 2 is a box-shaped structure with multiple side walls, which houses multiple drive and transmission components. A vertical groove 50 is provided on one side of the test box 2, which provides guiding space for the up and down movement of the slide 3. An operating table 49 is also fixedly installed on the top of the base 1. The operating table 49 integrates control circuits and an operating interface.

[0021] Furthermore, referring to Figures 2-5The clamping part of the colored yarn 16 is responsible for firmly and undamagedly fixing both ends of the colored yarn 16 being tested. The fixing support 4 is fixedly inserted through the side wall of the detection box 2, and its position is close to the bottom of the detection box 2. The slide 3 is slidably connected to the vertical groove 50 on the detection box 2 through the slider or guide rail structure on its side, so that the slide 3 can be smoothly raised and lowered in the vertical direction. The slide 3 is located directly above the fixing support 4. The two are mirror symmetrical in structure and are equipped with the same clamping mechanism inside. The core of the clamping mechanism is a roller 14 for winding the colored yarn 16. The roller 14 is connected to a slide 9 via a fixed post 10. The slide 9 is slidably embedded in a telescopic groove 8 opened on the inner wall of the top of the slide block 3. A magnet II 51 is fixedly embedded on one side of the inner wall of the telescopic groove 8. An iron material is fixed to the corresponding end of the slide 9. Through the magnetic attraction between the magnet II 51 and the iron material, the slide 9 can remain retracted to its initial position when not in operation. A spiral yarn guide groove 15 is machined on the outer cylindrical surface of the roller 14. The cross-sectional depth of the spiral yarn guide groove 15 gradually decreases from its starting end to its ending end. The top of the roller 14 is provided with There is a pressure plate 11, which is slidably connected to the top of the roller 14 via two vertical guide rods 12. The guide rods 12 can slide up and down within guide holes on the roller 14. Two magnets I 13 are fixed on each side of the bottom of the pressure plate 11. A layer of iron material is provided on the surface of the end of the roller 14 near the pressure plate 11. Through the magnetic attraction between the magnets I 13 and the iron material layer, the pressure plate 11 is naturally attracted to the top of the roller 14. In the inner cavity of the slide block 3, two rotating shafts 17 are longitudinally rotatably installed on both sides of the roller 14. Each rotating shaft 17 has... An arc-shaped cover plate 18 is fixedly fitted, and two arc-shaped cover plates 18 are arranged opposite each other. The inner arc surface can cover part of the outer cylindrical surface of the roller 14. A layer of rubber can be bonded to the inner side of the arc-shaped cover plate 18 to increase friction. Two rotating shafts 17 are fixedly fitted with a worm gear 21 in the cavity on one side of the slide block 3. A motor I 19 is fixed to the outside of the slide block 3 through the frame. The output shaft of the motor I 19 is connected to a worm 20 through a coupling. The worm 20 is arranged horizontally and located between the two worm gears 21, and meshes with the two worm gears 21 at the same time.

[0022] Furthermore, referring to Figure 2 and Figure 6 A base 22 is fixed on the inner wall of the slide 3 and the fixed support 4 on the side away from each other. A protective box 23 is fixed on the base 22. The rotating shaft 17 and the worm 20 rotate through the protective box 23. The meshing part of the worm wheel 21 and the worm 20 is located inside the protective box 23, which can be protected from dust. The clamping mechanism in the fixed support 4 is completely the same as that in the slide 3, except that the installation position is symmetrical.

[0023] Furthermore, referring to Figure 2 and Figure 3The tensile testing section is used to measure the tensile properties of the colored spun yarn 16. Inside the testing chamber 2, an electric push rod I5 is fixedly installed by the frame. The piston rod of the electric push rod I5 faces upward. A convex plate 6 is fixed on one side of the slide block 3. The convex plate 6 is located inside the testing chamber 2. A pressure sensor 7 is fixedly embedded at the end of the piston rod of the electric push rod I5. The sensing surface of the pressure sensor 7 faces upward and corresponds to the bottom position of the convex plate 6 on the slide block 3.

[0024] Specifically, when the piston rod of the electric push rod I5 extends, it can push the convex plate 6 upward through the pressure sensor 7, thereby driving the slide block 3 to move upward as a whole. At this time, the pressure sensor 7 detects its supporting force on the convex plate 6, which indirectly reflects the tensile force on the colored yarn 16.

[0025] Furthermore, referring to Figure 2 and Figures 7-9 The bending test section applies a controllable, repeated bending action to the spun yarn 16 under tension. A turntable 25 is rotatably connected to one side of the outer wall of the test chamber 2 via bearings. The turntable 25 is driven to rotate by a motor II 24 fixed inside the test chamber 2. On the side of the test chamber 2 where the turntable 25 is mounted, two guide rollers 31 are rotatably mounted on one side of the test chamber 2 via bearings to support and guide the spun yarn 16. During the bending test, slight rolling or sliding of the yarn on its surface is allowed to accommodate the bending deformation caused by the ceramic roller 29. The two guide rollers 31 are arranged in parallel, with their axes parallel to the rotation axis of the turntable 25. A radial sliding groove 26 is formed on the surface of the turntable 25 on the side away from the test chamber 2. A screw 27 is rotatably connected to the sliding groove 26 via bearings, with one end of the screw 27 extending to the outside of the turntable 25. A drive seat 52 is slidably fitted into the sliding groove 26, with a center of the drive seat 52 having a screw thread that connects to the screw 27. The threaded hole with a threaded fit, the cross section of the sliding groove 26 is preferably rectangular or dovetail-shaped, forming a stable sliding pair with the slider of the drive seat 52 to withstand the radial force generated when the ceramic roller 29 is working, ensuring that the screw 27 only bears the transmission torque and avoids bending. One end of a fixed rod 28 is fixed on the drive seat 52, and the other end extends outward to the turntable 25. The fixed rod 28 is located in the area between the two guide rollers 31. In the part of the fixed rod 28 that extends out of the turntable 25, the ceramic roller 29 and the friction roller 30 are slidably fitted. The ceramic roller 29 and the friction roller 30 are fixedly connected as a whole component and can slide along the axial direction of the fixed rod 28, but the two are relatively fixed. An electric push rod II 34 is fixedly installed inside the detection box 2. The piston rod of the electric push rod II 34 extends horizontally out of the side wall of the detection box 2, and an arc-shaped rubber plate 33 is fixed at its end. A rubber wheel 32 is fixedly fitted at the end of the screw 27 that extends out of the turntable 25. The position of the rubber wheel 32 corresponds to the position of the arc-shaped rubber plate 33.

[0026] Furthermore, the fixed rod 28 is provided with positioning grooves or limiting blocks (not shown in the figure) corresponding to the working positions of the ceramic roller 29 and the friction roller 30, respectively. When the ceramic roller 29 or the friction roller 30 reaches the corresponding position under the action of the spring 39 or the push rod 36, it can be assisted in positioning by the elastic pin or simple locking part (not shown in the figure) on the moving plate 38 or the fixed plate 40 to ensure the stability of the detection component during the test.

[0027] Furthermore, to prevent the fly debris generated during the test from affecting the stability of the friction transmission, the installation position and contact area of ​​the arc-shaped rubber plate 33 are covered by a partial sealing cover extending from the detection box 2, leaving only a narrow slit for contact with the rubber wheel 32.

[0028] Furthermore, referring to Figure 2 and Figures 7-9 The mode switching section is used to switch between bending test and wear test modes. This section is structurally related to the bending test section. Multiple fixing rods 43 are fixed on one side of the test chamber 2 where the turntable 25 is mounted. A fixing sleeve 42 is slidably fitted onto each fixing rod 43. All fixing sleeves 42, at their ends away from the test chamber 2, are fixedly connected to an annular plate 41. The annular plate 41 is coaxially arranged with the turntable 25. Dustproof sealing rings are provided at both ends of the fixing sleeves 42, and these sealing rings fit against the outer wall of the fixing rods 43. An elastic dustproof curtain is provided at the opening end of the sliding groove 26. The two ends of the elastic dustproof curtain are fixedly connected to the drive seat 52 and the inner wall of the sliding groove 26, respectively. Sealing end caps are provided at both ends of the screw 27 to prevent dust from entering the threaded mating surface. Inside the turntable 25, a clearance groove 37 communicating with the sliding groove 26 is provided. The clearance groove 37 extends along the diameter of the turntable 25. Extending outwards, the turntable 25 also has two rectangular slots 35 connected to the clearance slot 37. The extension direction of the rectangular slots 35 is parallel to the axis of the turntable 25. Two push rods 36 slide through the two rectangular slots 35 respectively. One end of the two push rods 36 located on the outside of the turntable 25 is fixedly connected to the end of the ceramic roller 29. A movable plate 38 slides with the guide rail in the clearance slot 37 through the slide rail on its back. The two push rods 36 slide through the movable plate 38. Multiple springs 39 are fixed on the side of the movable plate 38 facing away from the ceramic roller 29 through spring seats. The springs 39 are helical compression springs 39. The other ends of all the springs 39 are fixedly connected to a fixed plate 40 through another spring seat. The fixed plate 40 is fixedly sleeved on the two push rods 36. The ends of the two push rods 36 abut against the side of the annular plate 41. The two ends of a connecting column 44 are fixedly connected to the arc-shaped rubber plate 33 and the annular plate 41 respectively.

[0029] Furthermore, the control panel 49 is equipped with a controller (not shown in the figure, such as a programmable logic controller (PLC) or microprocessor) serving as the core control unit. This controller, through a preset control program and circuitry, is electrically connected to the motor II 24, electric actuator II 34, motor I 19, electric actuator I 5, and pressure sensor 7, respectively. It receives sensor signals and sends control commands to each actuator according to the preset test procedure described above, coordinating their orderly actions. This invention does not specifically limit the controller and its electrical connection methods with the various components; those skilled in the art can configure it based on conventional automation control knowledge.

[0030] In another embodiment: Refer to Figure 10 and Figure 11 The detection box 2 has two arc-shaped grooves 45 on the side near the vertical groove 50. The same arc-shaped cover 47 slides in the two arc-shaped grooves 45. Two arc-shaped sealing plates 46 are fixed on the side of the detection box 2 near the vertical groove 50. The sides of the two arc-shaped sealing plates 46 that are close to each other contact the top and bottom of the arc-shaped cover 47, respectively. The arc-shaped cover 47 and the two arc-shaped sealing plates 46 cooperate to form a protective cover for protecting the clamping mechanism, bending mechanism and control mechanism. A collection box 48 is fixed on the top of the base 1. The top of the collection box 48 is fixed through the arc-shaped sealing plate 46 located below. The arc-shaped cover 47 is made of transparent acrylic material. When the colored yarn 16 breaks during the detection process, the instantaneous burst of flying hair is blocked by the protective cover to prevent the flying hair from spreading in all directions. The collection box 48 can collect the flying hair. At the same time, the protective cover acts as a physical barrier to limit the rebound range of the broken colored yarn 16 and physically isolate the colored yarn 16 from the external sensors.

[0031] Furthermore, the arc-shaped cover 47 can slide manually or via an auxiliary drive device along the arc-shaped groove 45. When clamping and initially positioning the colored yarn 16, it can be slid open to expose the clamping mechanism and the area of ​​the guide roller 31. Before the test begins, it can be slid closed to form a closed or semi-closed protective space with the arc-shaped sealing plate 46. An operation window (not shown in the figure) with an openable cover can be provided on the arc-shaped cover 47 to facilitate threading the colored yarn 16.

[0032] The sliding mating surfaces of this device (such as the guide holes of guide rod 12 and roller 14, and fixed sleeve 43 and fixed sleeve 42) and transmission components (such as worm 20 and worm wheel 21, screw 27 and drive seat 52) ​​need to be lubricated regularly. The dustproof sealing ring and elastic dustproof curtain need to be inspected and replaced regularly to prevent dust accumulation or seal failure that could cause component jamming, and to ensure the testing accuracy and service life of the equipment.

[0033] A testing method for the toughness of colored spun yarn using a tester, comprising the following steps: S1. Pull the pressure plate 11 on the slide block 3 upwards to place the end of the colored yarn 16 on the top of the roller 14. Release the pressure plate 11. Under the attraction of magnet I 13, the pressure plate 11 presses the end of the colored yarn 16 onto the roller 14. Pull the handle on the slide table 9 outwards to overcome the attraction of magnet II 51 and pull the slide table 9 and roller 14 out from the inside of the slide block 3. Wind the colored yarn 16 into the starting end of the spiral yarn guide groove 15. Then rotate the roller 14 to make the colored yarn 16 wind around the spiral yarn guide groove 15 several times. As the depth of the yarn guide groove gradually decreases, the colored yarn 16 is pressed tighter and tighter. Then place the slide table 9 and roller 14 back into the slide block 3. The slide table 9 is positioned by the magnetic attraction between magnet II 51 and one end of the slide table 9. Motor I 19 is started, and motor I 19 drives worm gear 20 to rotate. Worm gear 20 drives two worm wheels 21 to rotate synchronously in opposite directions, thereby causing the two arc-shaped cover plates 18 to close inward, wrapping and pressing the colored yarn 16 section wound on roller 14. The other end of colored yarn 16 is installed on the clamping mechanism of fixed support 4 in the same way. The middle section of colored yarn 16 is in contact with one side of two guide rollers 31. At this time, the electric push rod I 5 is slowly extended by the control panel 49, pushing the slide table 3 to rise, so that colored yarn 16 is tensioned. Pressure sensor 7 monitors and feeds back the tension force value in real time. S2. When a bending test is required, the piston rod of the electric push rod II 34 is extended via the control panel 49, pushing the arc-shaped rubber plate 33 towards the turntable 25 until it maintains contact pressure with the rubber wheel 32. The motor II 24 is then started, driving the turntable 25 to rotate at a constant speed. The turntable 25 drives the fixed rod 28, drive seat 52, screw 27, rubber wheel 32, and ceramic roller 29 to revolve around the axis of the turntable 25. Since the position of the arc-shaped rubber plate 33 is fixed, rolling friction is generated between the rubber wheel 32 and the arc-shaped rubber plate 33 during the revolution. This friction drives the rubber wheel 32 and its connected screw. The rod 27 rotates, and the rotation of the screw 27 drives the drive seat 52 to move radially along the sliding groove 26 through the threaded pair, thereby changing the radial position of the fixed rod 28 and the ceramic roller 29 relative to the center of the turntable 25. During the rotation, the ceramic roller 29 periodically contacts and pushes the colored yarn 16 segment between the two guide rollers 31, causing it to bend. As the radial position of the ceramic roller 29 changes periodically, the bending amplitude of the colored yarn 16 also changes accordingly, thereby realizing the periodic bending test with adjustable amplitude in this embodiment. The pressure sensor 7 can synchronously monitor the change in tension of the colored yarn 16 during the bending process. S3. When a surface wear resistance test is required, the piston rod of the electric push rod II 34 is controlled to retract by the operating table 49. The arc-shaped rubber plate 33 moves away from the rubber wheel 32 and the two are no longer in contact. At the same time, the arc-shaped rubber plate 33 pulls the annular plate 41 towards the test box 2 through the connecting column 44. The annular plate 41 no longer applies a pushing force to the end of the push rod 36. At this time, under the elastic force of the spring 39, the fixed plate 40 drives the two push rods 36 to move towards the annular plate 41 until the end of the push rod 36 contacts the annular plate 41 again. This movement pushes the ceramic roller 29 and the friction roller 30 fixed to it to slide along the fixed rod 28 axially, so that the ceramic roller 29 is separated from the contact position with the colored yarn 16, while the friction roller 30 moves to the contact position with the colored yarn 16. The motor II 24 is started to drive the turntable 25 to rotate, and the friction roller 30 revolves accordingly. Its rough surface continuously rubs against the colored yarn 16 to realize the wear test. The pressure sensor 7 can monitor the attenuation of the tension of the colored yarn 16 during the wear process. S4. After the test is completed, control the electric push rod I5 to extend, so that the slide 3 drops and releases the colored yarn 16. Control the motor I19 to reverse and open the arc-shaped cover plate 18. Slightly rotate the roller 14 in the opposite direction to remove the colored yarn 16 sample after the test. The broken colored yarn 16 or the generated fly is confined in the protective cover and may fall into the collection box 48.

[0034] However, as is well known to those skilled in the art, the working principles and electrical connections of the control panel 49, motor II 24, electric actuator II 34, motor I 19 and electric actuator I 5 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0035] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A yarn toughness tester, comprising a base (1), wherein a test chamber (2) is fixed to the top of the base (1); The slide (3) and the fixed support (4) are provided. A vertical groove (50) is provided on one side of the detection box (2). The slide (3) is slidably connected in the vertical groove (50). The fixed support (4) is fixedly inserted through the detection box (2) and located below the slide (3). include: Both the slide (3) and the fixed support (4) are provided with clamping mechanisms for clamping the colored yarn (16); The tensile testing assembly includes an electric push rod I (5) fixed inside the testing box (2) and a convex plate (6) fixed on one side of the slide (3). A pressure sensor (7) is fixedly embedded at the top of the piston rod of the electric push rod I (5). The pressure sensor (7) is arranged opposite to the bottom of the convex plate (6) and is used to drive the slide (3) to rise and detect the tensile force on the colored yarn (16). Two guide rollers (31) are rotatably mounted on one side of the detection box (2) via bearings to support and guide the colored yarn (16). The turntable (25) is rotatably connected to one side of the detection box (2) and is located between the two guide rollers (31); A bending mechanism is provided inside the detection box (2) to drive the fixed rod (28) connected to the turntable (25) to move so that the fixed rod (28) can perform bending detection on the colored yarn (16) tensioned between the two guide rollers (31).

2. The yarn toughness tester according to claim 1, characterized in that, The clamping mechanism includes a roller (14), two arc-shaped cover plates (18) and a drive assembly. The roller (14) is slidably connected to the slide block (3) via a slide table (9). The outer wall of the roller (14) is provided with a spiral yarn guide groove (15). The cross-sectional depth of the spiral yarn guide groove (15) gradually decreases from its inlet end to its tail end, so that the colored yarn (16) wound on it can achieve self-locking. The two arc-shaped cover plates (18) are rotatably connected to the slide block (3) via a rotating shaft (17) and are arranged opposite to the roller (14). The drive assembly includes a motor I (19), a worm (20) and two worm wheels (21). The motor I (19) is fixed to one side of the slide (3). The worm (20) is connected to the output shaft of the motor I (19). The two worm wheels (21) are respectively fixed on the two rotating shafts (17) and mesh with the worm (20).

3. The yarn toughness tester according to claim 2, characterized in that, The clamping mechanism also includes a pressure plate (11). Two guide rods (12) are slidably connected to the top of the roller (14). The pressure plate (11) is fixed to the top of the two guide rods (12). A magnet I (13) is fixed to the bottom of the pressure plate (11). An iron block layer is provided on the top of the roller (14). The pressure plate (11) is driven to move down by the magnetic attraction between the magnet I (13) and the iron block layer to initially press the colored yarn (16).

4. The yarn toughness tester according to claim 3, characterized in that, The bending mechanism includes a screw (27), a drive seat (52), an electric push rod II (34), and a motor II (24). A sliding groove (26) is provided on one side of the turntable (25). The drive seat (52) slides with the side wall of the sliding groove (26) through a slider on its side to achieve radial guidance. A threaded hole that mates with the screw (27) is provided at the center of the drive seat (52). The fixing rod (28) is fixed on the drive seat (52). A rubber wheel (32) is fixedly sleeved on the outer wall of the screw (27). The electric push rod II (34) is fixed inside the detection box (2). Its piston rod extends to the outside of the detection box (2) and is fixed with an arc-shaped rubber plate (33). The motor II (24) is fixed inside the detection box (2), and its output shaft is fixedly connected to the turntable (25). When the electric push rod II (34) drives the arc-shaped rubber plate (33) to contact the rubber wheel (32), the turntable (25) rotates and drives the screw (27) to rotate by friction, so as to drive the fixed rod (28) to move along the axis of the screw (27).

5. The yarn toughness tester according to claim 4, characterized in that, It also includes a control mechanism, comprising a ceramic roller (29) and a friction roller (30) slidably sleeved on the outer wall of the fixed rod (28). The ceramic roller (29) is fixedly connected to the friction roller (30). The control mechanism is used to control the contact between the ceramic roller (29) or the friction roller (30) and the colored yarn (16) to perform bending resistance detection or surface wear resistance detection. The control mechanism also includes multiple fixed sleeve rods (43), an annular plate (41), a push rod (36), and a spring (39). The multiple fixed sleeve rods (43) are fixed to one side of the detection box (2). The annular plate (41) is connected by multiple fixed sleeves (44) slidably sleeved on the fixed sleeve rods (43). 2) It is slidably connected to the detection box (2), and the annular plate (41) is fixedly connected to the arc-shaped rubber plate (33) through the connecting column (44). The turntable (25) is provided with a relief groove (37) and two rectangular grooves (35) connected to the relief groove (37). The two push rods (36) are slidably connected to the two rectangular grooves (35) respectively. One end of the push rod is fixedly connected to the ceramic roller (29), and the other end passes through the movable plate (38) slidably connected to the relief groove (37) and abuts against one side of the annular plate (41). The spring (39) is set between the movable plate (38) and the fixed plate (40) fixed on the push rod (36). When the electric push rod II (34) retracts, it drives the annular plate (41) to move and releases the thrust on the push rod (36). The spring (39) pushes the ceramic roller (29) and the friction roller (30) to slide along the fixed rod (28), so that the friction roller (30) contacts the colored yarn (16).

6. The yarn toughness tester according to claim 5, characterized in that, The arc-shaped cover plate (18) has a rubber layer fixed on the side near the roller (14).

7. The yarn toughness tester according to claim 6, characterized in that, The inner walls of the slide (3) and the fixed support (4) on the side away from each other are fixed with bases (22), and the two bases (22) are fixed with protective boxes (23) on the side close to the detection box (2). The worm (20) and the two worm wheels (21) are located inside the protective box (23).

8. The yarn toughness tester according to claim 7, characterized in that, It also includes a protective cover, which consists of an arc-shaped cover (47) and two arc-shaped sealing plates (46). The two arc-shaped sealing plates (46) are fixed to the side of the detection box (2) near the vertical groove (50). The arc-shaped cover (47) is slidably disposed on the detection box (2) and located between the two arc-shaped sealing plates (46). A collection box (48) is fixed to the top of the base (1), and the top of the collection box (48) passes through the arc-shaped sealing plate (46) located below.

9. A yarn toughness tester according to claim 8, characterized in that, The top of the base (1) is fixed with an operating table (49) for controlling the motor II (24), electric push rod II (34), motor I (19) and electric push rod I (5).

10. A testing method for a colored yarn toughness tester, applied to the colored yarn toughness tester as described in claim 9, characterized in that, Includes the following steps: S1. The two ends of the colored yarn (16) are wound through the rollers (14) in the slide (3) and the fixed support (4) respectively, so that the colored yarn (16) is placed in the spiral yarn guide groove (15), and the motor I (19) is started to drive the arc cover plate (18) to close to press the colored yarn (16); the control panel (49) drives the electric push rod I (5) to extend, pushes the slide (3) to rise to tension the colored yarn (16), and monitors the tension value in real time through the pressure sensor (7); S2. Control the electric push rod II (34) to extend so that the arc-shaped rubber plate (33) contacts the rubber wheel (32) on the turntable (25); start the motor II (24) to drive the turntable (25) to rotate. The rubber wheel (32) rotates by friction with the arc-shaped rubber plate (33), driving the screw (27) to rotate and the drive seat (52) to move radially, thereby driving the ceramic roller (29) to periodically push and bend the colored yarn (16) tensioned between the two guide rollers (31). The tension change during the bending process is monitored by the pressure sensor (7). S3. Control the electric push rod II (34) to retract, so that the arc-shaped rubber plate (33) and the rubber wheel (32) are disengaged, and the ring plate (41) is driven by the connecting column (44) to release the thrust on the push rod (36); under the action of the spring (39), the ceramic roller (29) and the friction roller (30) slide along the fixed rod (28) axially, and switch to the position where the friction roller (30) contacts the colored yarn (16); start the motor II (24) to drive the turntable (25) to rotate, and use the friction roller (30) to continuously rub the colored yarn (16), and monitor the tension decay during the wear process through the pressure sensor (7); S4. After the test is completed, control the electric push rod I (5) to lower the slide (3) to release the colored yarn (16), control the motor I (19) to reverse and open the arc cover plate (18), and remove the colored yarn (16) sample.

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