Stripping force testing equipment applied to coating layer of plastic-coated wire

Abstract

The invention relates to the technical field of plastic-coated wire performance testing, in particular to plastic-coated wire coating layer stripping force testing equipment which comprises a testing table and a clamping jaw driving mechanism arranged on the testing table and used for dragging a plastic-coated wire for testing. The hydraulic clamping jaw clamps one end of the plastic-coated wire, the straight plate can be driven by the driving mechanism to move, the stripping knife is extruded towards the middle through mutual cooperation of the round rod, the U-shaped groove and the inclined groove, the stripping knife is inserted into a coating layer of the plastic-coated wire, and then the coating layer at one end of the plastic-coated wire can be directly stripped off along with continuous movement of the straight plate. And then an L-shaped push plate pushes a bottom rod to drive a hydraulic clamping jaw to move, the plastic-coated wire penetrates through a stripping mold to be inserted into a clamping jaw driving mechanism, automatic feeding of the device is achieved, a tester does not need to strip the end of the plastic-coated wire through stripping pliers, and the convenience performance of the device is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic-coated silk performance testing, in particular to a device for testing the peeling force of a coating layer of a plastic-coated silk. Background Art

[0002] Plastic coated wire is also known as plastic-covered wire or PVC wire. It is a metal wire (such as galvanized iron wire, stainless steel wire, annealed wire, etc.) coated with a layer of polyvinyl chloride (PVC) or polyethylene (PE) to firmly combine the plastic and the core wire. This material has the characteristics of anti-aging, corrosion resistance, anti-cracking, and long service life. It is widely used in animal breeding, agricultural and forestry protection, aquaculture, park and zoo fences, stadiums and other fields. During the production process of plastic coated wire, peel force test is required to check the adhesion of the plastic coated steel wire.

[0003] The peeling force testing equipment currently on the market, for example, when testing a 0.50 diameter plastic-coated wire sample, will install a peeling die with an inner diameter of 0.44 on the testing equipment. However, before the test, the tester needs to first remove the coating on both ends of the plastic-coated wire, and then pass the end of the plastic-coated wire without the coating through the peeling die and clamp it on the clamping jaw. Only then can the plastic-coated wire be driven to move downward by the clamping jaw, so that the plastic-coated wire passes through the peeling die smaller than its diameter, and the coating layer is peeled off. Then, the tensile force is monitored by pulling the clamping jaw downward to obtain the adhesion of the plastic-coated wire coating layer and realize the peeling force test of the plastic-coated wire coating layer.

[0004] However, there are still some defects in the actual testing process. Although the peel force testing equipment currently available on the market can automatically test the coating layer of plastic-coated wire, the tester is required to remove the coating at both ends of the plastic-coated wire before testing. This is not only time-consuming and labor-intensive, but also requires the tester to pass the plastic-coated wire through the peeling mold and insert it into the clamp after the coating layer is removed, further reducing the testing efficiency of the device.

[0005] Therefore, a device for testing the peeling force of the coating layer of plastic-coated silk is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a device for testing the peeling force of the coating layer of plastic-coated silk.

[0007] The top of the fixing frame is fixedly provided with a fixing plate, and the fixing plate is installed on the fixing frame by bolts, and the stripping mold is installed on the fixing plate by bolts. The top of the fixing frame is fixedly connected with a placing seat for placing the plastic coated wire. The top of the fixing frame is provided with a hydraulic clamping jaw on the side away from the stripping mold. The top of the fixing frame is fixedly connected with a pair of L-shaped plates relative to the placing seat and the stripping mold. The top of the fixing frame is provided with a pair of sliding grooves relative to the L-shaped plates, and the inner side of the sliding groove is slidably connected with a straight plate. The top ends of the two straight plate side walls are both slidably connected to the moving frame. The two moving frames are both installed with stripping knives for stripping the coating layer on the plastic coated wire by bolts on the adjacent sides. The fixed frame is provided with a driving mechanism for driving the two straight plates to slide, and the two L-shaped plates are provided with a stripping mechanism for adjusting the position of the stripping knife.

[0008] In the above technical solution, further, the peeling mechanism includes a round rod, and the round rod is slidably connected to the bottom end of the movable frame, a U-shaped groove is provided at the top of the L-shaped plate, and one end of the U-shaped groove is longer than the other end, an inclined groove is provided between the two ends of the U-shaped groove, and an inward-sunk groove is provided at the bottom end of the inclined groove, and the connection between the groove and the inclined groove is inclined, the bottom end of the round rod is inserted into the inner side of the groove, an upper spring is fixedly connected between the outer wall of the round rod and the bottom end of the movable frame, a pair of lower springs are fixedly connected between the inner side of the movable frame and the outer wall of the straight plate, and the bottom end of the round rod is set to a smooth arc surface.

[0009] In the above technical solution, further, the stripping knives on the side walls of the two movable frames are arranged in a staggered manner, and a push spring is fixedly connected between the inner side of the sliding groove and the straight plate.

[0010] In the above technical solution, further, the driving mechanism includes a driving motor, a threaded rod is rotatably connected to the inner side of the fixed frame, the driving motor is fixedly connected to the side wall of the fixed frame, the output end of the driving motor passes through the inner side of the fixed frame and is fixedly connected to the end of the threaded rod, the bottom end of the fixed frame is slidably connected to the driving block relative to the position below the placement seat, and the threaded rod is threadedly connected to the inner side wall of the driving block, a top groove is provided at the top of the driving block, both ends of the top groove are slidably connected to the fixed seat, the two fixed seats are rotatably connected to the top plate on the inside, the top end of the fixed frame is fixedly connected to the two fixed seats, release grooves are provided on both sides of the top of the extrusion plate, and an upper groove is provided at the top of the fixed frame relative to the position below the hydraulic clamp.

[0011] In the above technical solution, further, the side end of the release groove is inclined, the side wall of the top plate is inclined and fixedly connected with an inclined plate away from the straight plate, and the bottom of the inclined plate is abutted against the inner bottom end of the fixed seat, and a return spring is fixedly connected between the bottom end of the inclined plate and the inner bottom end of the fixed seat, and the two fixed seats are fixedly connected with an extrusion rod on the side close to the top end, and a return spring is fixedly connected between the two fixed seats.

[0012] In the above technical solution, further, a bottom groove is provided at the bottom end of the side wall of the placement seat, and an L-shaped support frame for supporting the end of the plastic-coated wire is slidably connected to the inner side of the bottom groove, and a tension spring is fixedly connected between the inner side of the bottom groove and the side wall of the L-shaped support frame. The two straight plates are fixedly connected to the side close to each other with a side plate for pushing the L-shaped support frame to move, and a material guide groove is inclined at the top end of the L-shaped support frame, and a lower groove is provided at the bottom end of one of the side walls of the L-shaped plate, and the top end of the fixed frame is fixedly connected to a right-angle block with an inclined surface relative to the position in the lower groove.

[0013] In the above technical solution, further, the bottom of the hydraulic clamp is fixedly connected with a bottom rod relative to the position in the upper groove, the side wall of the driving block is fixedly connected with an L-shaped push plate for pushing the bottom rod to move, and a loading spring is fixedly connected between the side wall of the placement seat and the side wall of the hydraulic clamp. Push plates are fixedly connected on both sides of the outer wall of the hydraulic clamp, and extrusion grooves are provided on the side close to each other, and the connection between the side wall of the push plate and the extrusion groove is inclined, and the inner side of the extrusion groove is inclined.

[0014] In the above technical solution, further, the side of the two movable frames that are away from each other is set to a smooth arc surface, the long end of the U-shaped groove is opened with a straight groove, and the bottom end of the straight groove is flush with the bottom end of the groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is provided with structures such as a stripping knife, a stripping mechanism and a driving mechanism. It only requires placing the plastic-coated wire on a placement seat and clamping one end of the plastic-coated wire by a hydraulic clamp. The straight plate can be driven to move by the driving mechanism. Subsequently, the stripping knife is squeezed toward the middle through the cooperation of the round rod, the U-shaped groove and the inclined groove, so that the stripping knife is inserted into the coating layer of the plastic-coated wire. Then, as the straight plate continues to move, the coating layer at one end of the plastic-coated wire can be directly stripped off. Subsequently, the bottom rod is pushed by the L-shaped push plate to drive the hydraulic clamp to move, and the plastic-coated wire is passed through the stripping mold and inserted into the clamp driving mechanism, thereby realizing automatic loading of the device. There is no need for the tester to use stripping pliers to strip the end of the plastic-coated wire, which greatly improves the convenience of the device.

[0017] 2. The present invention arranges the push plate, the extrusion groove and the straight groove, so that after the plastic-coated wire is inserted into the clamping claw driving mechanism, the extrusion moving frame can be moved to the side close to it, thereby driving the stripping knife to move toward the middle, so that the coating layer at the other end of the plastic-coated wire can be stripped off. Subsequently, the extrusion groove can be used to extrude the moving frame to further extrude the stripping knife to move toward the middle, thereby cutting off the plastic-coated wire, realizing the automatic stripping of the coating layers at both ends of the plastic-coated wire, and further improving the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance of the testing device of the present invention;

[0019] Figure 2 This is a schematic diagram of the front three-dimensional structure of the fixing frame of the present invention;

[0020] Figure 3 This is a schematic diagram of the full-section side three-dimensional structure of the fixing frame of the present invention;

[0021] Figure 4 The appended Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0022] Figure 5 The appended Figure 3 A schematic diagram of the partially enlarged structure at point B in the middle;

[0023] Figure 6 This is a schematic diagram of a fractured three-dimensional structure of the driving mechanism of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the straight plate and the movable frame of the present invention;

[0025] Figure 8 This is a schematic diagram of a partial top view of the three-dimensional structure of the L-shaped plate of the present invention;

[0026] Figure 9 It is a schematic diagram of a partial top view of the three-dimensional structure of the fixing frame of the present invention;

[0027] Figure 10 This is a schematic diagram of the front full-section three-dimensional structure of the placement seat of the present invention.

[0028] In the figure: 1. test bench; 2. clamping jaw drive mechanism; 3. fixed frame; 4. mounting plate; 5. stripping mold; 6. placement seat; 7. hydraulic clamping jaw; 8. L-shaped plate; 9. straight plate; 10. moving frame; 11. stripping knife; 12. round rod; 13. U-shaped groove; 14. inclined groove; 15. groove; 16. upper spring; 17. lower spring; 18. driving motor; 19. threaded rod; 20. driving block; 21. fixed seat; 22. top plate; 23. inclined plate; 24. extrusion plate; 25. release groove; 26. reset spring; 27. extrusion rod; 28. return spring; 29. ​​push spring; 30. L-shaped support frame; 31. tension spring; 32. side plate; 33. right-angle block; 34. L-shaped push plate; 35. bottom rod; 36. feeding spring; 37. push plate; 38. extrusion groove; 39. straight groove. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figures 1-10The device shown is a test device for the peeling force of the coating layer of plastic-coated silk, comprising a test bench 1, and a clamping claw driving mechanism 2 arranged on the test bench 1 for pulling the plastic-coated silk for testing. The clamping claw driving mechanism 2 comprises a lateral moving mechanism and a hydraulically driven clamping claw and other structural components, which can automatically clamp the plastic-coated silk and monitor it through a mechanical sensor, thereby achieving a peeling test by pulling the plastic-coated silk to move through a peeling mold 5. This is a mature technology in the prior art and will not be described in detail here. A fixed frame 3 is fixedly connected to the top of the test bench 1, and the top of the fixed frame 3 is flush with the top of the test bench 1. A mounting plate 4 is installed on the fixed frame 3 by bolts, and a peeling mold 5 is installed on the mounting plate 4 by bolts. The peeling mold 5 is installed on the mounting plate 4 by bolts, which is convenient for replacing different peeling molds 5 according to the size of the tested plastic-coated silk. A placement device for placing the plastic-coated silk is fixedly connected to the top of the fixed frame 3. The placing seat 6 can support the middle position of the plastic-coated wire through the placing seat 6. A hydraulic clamp 7 is provided at the top of the fixed frame 3 and away from the side of the stripping mold 5. The hydraulic clamp 7 can automatically clamp the plastic-coated wire, and the inner wall of the hydraulic clamp 7 can limit the end of the plastic-coated wire to ensure the distance of the front stripping knife 11 to strip the coating layer. A pair of L-shaped plates 8 are fixedly connected between the top of the fixed frame 3 and the placing seat 6 and the stripping mold 5. A pair of slides are opened between the top of the fixed frame 3 and the L-shaped plates 8. A straight plate 9 is slidably connected to the inside of the slide. The top ends of the side walls of the two straight plates 9 are penetrated and slidably connected with a moving frame 10. The two moving frames 10 are both bolted to one side to install a stripping knife 11 for stripping the coating layer on the plastic-coated wire. A driving mechanism for driving the two straight plates 9 to slide is provided on the fixed frame 3, and a stripping mechanism for adjusting the position of the stripping knife 11 is provided on the two L-shaped plates 8.

[0032] The stripping mechanism includes a round rod 12, and the round rod 12 passes through and is slidably connected to the bottom end of the movable frame 10. A U-shaped groove 13 is provided at the top of the L-shaped plate 8, and one end of the U-shaped groove 13 is longer than the other end. An inclined groove 14 is provided between the two ends of the U-shaped groove 13. The setting of the U-shaped groove 13 makes it easy to squeeze the round rod 12, and at the same time, the squeezing of the round rod 12 can be quickly released without affecting the resetting of the stripping knife 11, thereby preventing the stripping knife 11 from continuing to strip the coating on the plastic-coated wire when the plastic-coated wire is inserted into the clamping claw drive mechanism 2. An inward groove 15 is provided at the bottom end of the inclined groove 14. By setting the groove 15, a step is provided between the groove 15 and the U-shaped groove 13, which can control the sliding direction of the round rod 12. To play a guiding role, the connection between the groove 15 and the inclined groove 14 is inclined, which is convenient for the round rod 12 to slide from the groove 15 into the inclined groove 14, and the bottom end of the round rod 12 is inserted into the inner side of the groove 15. An upper spring 16 is fixedly connected between the outer wall of the round rod 12 and the inner bottom end of the moving frame 10, which is convenient for pushing the bottom end of the round rod 12 into the groove 15. A pair of lower springs 17 are fixedly connected between the inner side of the moving frame 10 and the outer wall of the straight plate 9, which is convenient for quickly pushing the moving frame 10 to reset. The bottom end of the round rod 12 is set to a smooth arc surface, which can make the round rod 12 slide out of the groove 15 more smoothly, and a push spring 29 is fixedly connected between the side wall of the slide groove and the straight plate 9. Through the setting of the push spring 29, it is convenient to push the straight plate 9 to quickly reset;

[0033] The driving mechanism includes a driving motor 18, a threaded rod 19 is rotatably connected to the inner side of the fixed frame 3, the driving motor 18 is fixedly connected to the side wall of the fixed frame 3, the output end of the driving motor 18 passes through the inner side of the fixed frame 3 and is fixedly connected to the end of the threaded rod 19, the bottom end of the fixed frame 3 is slidably connected to the driving block 20 relative to the position below the placement seat 6, and the threaded rod 19 is threadedly connected to the inner wall of the driving block 20, the top of the driving block 20 is provided with a top groove, both ends of the top groove are slidably connected to the fixed seats 21, the insides of the two fixed seats 21 are rotatably connected to the top plate 22, the top end of the fixed frame 3 is fixedly connected to the two fixed seats 21, and the top end of the extrusion plate 24 is fixedly connected to the extrusion plate 24. Release grooves 25 are provided on both sides of the top of the extrusion plate 24. The release grooves 25 facilitate the release of the extrusion of the extrusion rod 27, and the top of the fixed frame 3 is provided with an upper groove relative to the position below the hydraulic clamp 7;

[0034] The side ends of the release grooves 25 are inclined so as to facilitate the smoother pushing of the extrusion rods 27 to move to both sides. The side walls of the top plate 22 are tilted and fixedly connected to the side away from the straight plate 9. The inclined plate 23 can limit the rotation position of the top plate 22, and the bottom of the inclined plate 23 abuts against the inner bottom end of the fixing seat 21. A return spring 26 is fixedly connected between the bottom end of the inclined plate 23 and the inner bottom end of the fixing seat 21, which facilitates pulling the inclined plate 23 and the top plate 22 to support and return the flipping position of the top plate 22. The top ends of the two fixing seats 21 are fixedly connected to the extrusion rods 27 on the side close to each other. The extrusion rods 27 facilitate the fixing seat 21 to be squeezed by the outer wall of the extrusion plate 24 more smoothly. A return spring 28 is fixedly connected between the two fixing seats 21, which facilitates pulling the fixing seat 21 to slide toward the middle for return.

[0035] When testing the stripping force of the plastic-coated wire, the plastic-coated wire is first placed on the placement seat 6, and one end of the plastic-coated wire is inserted into the hydraulic clamping jaw 7, and the other end is placed on the L-shaped support frame 30. Then, the hydraulic clamping jaw 7 can be controlled to start to clamp one end of the plastic-coated wire, and then the driving motor 18 is controlled to start to drive the threaded rod 19 to rotate, thereby driving the threaded driving block 20 to slide at the bottom end of the fixed frame 3, and at the same time driving the fixed seat 21 and the top plate 22 to move. Because the side wall of the top plate 22 is restricted by the inclined plate 23, it cannot be flipped to the side close to the inclined plate 23. When the top plate 22 moves to the side of the straight plate 9, it will push the straight plate 9 to slide in the slide groove (at this time, the fixed seat 21 and the extrusion rod 27 are located at both ends of the top groove under the extrusion of the outer wall of the extrusion plate 24, and the return spring 28 is in a stretched state, and the top plate 22 is located at a position corresponding to the straight plate 9);

[0036] Then, the movement of the straight plate 9 will drive the moving frame 10 and the stripping knife 11 to move. At this time, the bottom end of the round rod 12 is inserted into the groove 15. Since there is a step between the groove 15 and the U-shaped groove 13, it is restricted. Therefore, under the extrusion of the side wall of the inclined groove 14, the round rod 12 and the moving frame 10 will be pushed to slide toward the middle, thereby driving the stripping knife 11 to move toward the middle. Then the round rod 12 slides out of the groove 15 and slides into the bottom end of the inclined groove 14, and compresses the upper spring 16. Then the round rod 12 slides out of the inclined groove 14. At this time, the stripping knife 11 is completely inserted into the coated part of the plastic-coated silk. In the coating, the round rod 12 then slides into the short horizontal groove on the U-shaped groove 13, compressing the lower spring 17 at the same time, and then drives the stripping knife 11 to continue to move through the straight plate 9, which will complete the stripping of the coating layer on one end of the plastic-coated wire. At the same time, the straight plate 9 will gradually compress the push spring 29, and then the stripping knife 11 will completely strip off the coating layer on the side end of the plastic-coated wire. At this time, the round rod 12 moves to the longitudinal end of the U-shaped groove 13, thereby releasing the squeeze on the moving frame 10, and then the moving frame 10 is pushed to move to both sides under the elastic force of the lower spring 17, so that the stripping knife 11 moves out of the plastic-coated wire;

[0037] Before the stripping knife 11 is about to completely strip off the coating layer on the plastic-coated wire, the squeezing rod 27 on the fixed seat 21 moves to the release groove 25 of the squeezing plate 24, and then the squeezing rod 27 is pulled to move along the inclined surface of the release groove 25 under the elastic force of the return spring 28, thereby driving the fixed seat 21 to gradually slide toward the middle. Then, when the round rod 12 moves to the longitudinal end of the U-shaped groove 13, the squeezing rod 27 is completely moved out of the release groove 25, thereby driving the top plate 22 to move out from the side of the straight plate 9, releasing the thrust on the straight plate 9. At this time, the round rod 12 slides from the longitudinal end of the U-shaped groove 13 to the other transverse end, so that the straight plate 9 that loses the thrust is pushed to reset under the elastic force of the push spring 29, and at the same time drives the round rod 12 to slide into the end of the long end of the U-shaped groove 13 and is located above the groove 15. Then, under the elastic force of the upper spring 16, the bottom end of the round rod 12 is pushed into the groove 15, thereby completing the automatic stripping of the coating layer at one end of the plastic-coated wire. There is no need for the tester to use stripping pliers to strip the end of the plastic-coated wire, which greatly improves the convenience of the device.

[0038] In order to further improve the stability of the plastic-coated wire during the feeding process, a bottom groove is provided at the bottom end of the side wall of the placement seat 6, and an L-shaped support frame 30 for supporting the end of the plastic-coated wire is slidably connected to the inside of the bottom groove. The L-shaped support frame 30 supports the side end of the plastic-coated wire to avoid affecting the subsequent accurate passage of the plastic-coated wire through the stripping mold 5. A tension spring 31 is fixedly connected between the inside of the bottom groove and the side wall of the L-shaped support frame 30, and the tension spring 31 facilitates pulling the L-shaped support frame 30 to reset. The two straight plates 9 are fixedly connected to one side for pushing the L-shaped support frame 30 to move. The side plate 32 can push the L-shaped support frame 30 to move when the straight plate 9 is scraping the coating layer on one end of the plastic-coated wire. The side plate 32 can push the L-shaped support frame 30 to move and push the L-shaped support frame 30 away to avoid obstructing the normal scraping of the stripping knife 11. When the straight plate 9 is reset, the squeezing of the L-shaped support frame 30 can be released. Then, the L-shaped support frame 30 is pulled back to its original position under the elastic force of the tension spring 31, thereby transferring the plastic-coated wire on the stripping knife 11 to the L-shaped support frame 30, avoiding affecting the normal feeding of the subsequent plastic-coated wire.

[0039] A guide groove is provided at the top of the L-shaped support frame 30 to facilitate the discharge of the coating layer stripped off by the stripping knife 11. A lower groove is provided at the bottom end of the side wall of one of the L-shaped plates 8. The top of the fixed frame 3 is fixedly connected to a right-angle block 33 with an inclined surface at a position relative to the lower groove. The right-angle block 33 is connected to the guide groove to facilitate the scraped coating layer to roll out from the guide groove and the right-angle block 33 to avoid falling into the gap and being inconvenient to clean, thereby further improving the convenience of the device.

[0040] In order to further improve the automation efficiency of the device, a bottom rod 35 is fixedly connected to the position of the upper groove below the hydraulic clamp 7, and an L-shaped push plate 34 is fixedly connected to the side wall of the driving block 20 for pushing the bottom rod 35 to move. A loading spring 36 is fixedly connected between the side wall of the placement seat 6 and the side wall of the hydraulic clamp 7. When the driving motor 18 starts to drive the driving block 20 to move and peel off the coating layer at one end of the plastic-coated wire, the movement of the driving block 20 will drive the L-shaped push plate 34 to move, and then when the top plate 22 moves away from the straight plate 9, Finally, when the coating layer on one end of the plastic-coated wire is stripped off, the side end of the L-shaped push plate 34 will move to the side of the bottom rod 35, and then through the continued movement of the driving block 20, the L-shaped push plate 34 will drive the bottom rod 35 to slide in the upper groove, and at the same time drive the hydraulic clamping jaw 7 to move, and gradually compress the feeding spring 36, and then push the plastic-coated wire toward the mounting plate 4 to move, so that the side end of the plastic-coated wire passes through the stripping mold 5 and is inserted into the hydraulic drive clamping jaw on the clamping jaw driving mechanism 2, thereby realizing automatic loading of the device and further improving the convenience performance of the device.

[0041] In order to further improve the test efficiency of the device, the outer walls of the hydraulic clamp 7 are fixedly connected with push plates 37 on both sides, and the two push plates 37 are provided with extrusion grooves 38 on the side close to each other, and the connection between the side wall of the push plate 37 and the extrusion groove 38 is inclined, which is convenient for preliminary extrusion of the moving frame 10 to insert the stripping knife 11 into the coating layer of the plastic-coated wire and strip the coating layer at the other end (stripping the coating layer at the other end of the plastic-coated wire can improve the accuracy and reliability of the test results. Removing the coating at both ends can avoid the influence of the coating edge effect on the test results, so that the measurement of the peeling force is closer to the real bonding strength between the coating and the substrate. In addition, removing the coating at both ends can improve the accuracy and reliability of the test results. It can also prevent the unevenness or defects of the coating edge from interfering with the test results, thereby more accurately evaluating the adhesion performance and weather resistance of the coating. The inner side of the extrusion groove 38 is inclined to facilitate further extrusion of the movable frame 10 to cut the plastic-coated wire. The two movable frames 10 are arranged on a smooth arc surface away from each other, which is convenient for being extruded by the inclined surface of the push plate 37. A straight groove 39 is provided at the long end of the U-shaped groove 13. The setting of the straight groove 39 avoids affecting the normal sliding of the round rod 12, and the bottom end of the straight groove 39 is flush with the bottom end of the groove 15. The stripping knives 11 are staggered on the side walls of the movable frame 10. The staggered setting of the stripping knives 11 facilitates cutting the plastic-coated wire.

[0042] When the driving motor 18 drives the L-shaped push plate 34, the driving block 20 and the hydraulic clamping jaw 7 to move and automatically feed the plastic-coated wire, when the stripped end of the plastic-coated wire passes through the stripping mold 5 and is inserted into the clamping jaw driving mechanism 2, the clamping jaw driving mechanism 2 can be controlled to start, clamp the plastic-coated wire, and move at the same speed and direction as the hydraulic clamping jaw 7. Then, the pushing plate 37 next to the hydraulic clamping jaw 7 will move to the side of the moving frame 10, and then, through the inclined surface at the connection between the side wall of the pushing plate 37 and the extrusion groove 38, the arc surface of the side wall of the moving frame 10 is squeezed, so that the moving frame 10 moves to the side close to it (when the pushing plate 37 moves to the side of the moving frame 10, the straight plate 9 has a certain resistance due to the elastic force of the pushing spring 29. Therefore, as long as the elastic force of the pushing spring 29 is greater than the thrust of the moving frame 10, when the inclined surface of the side wall of the pushing plate 37 squeezes the moving frame 10, the moving frame 10 will not slide with the pushing plate 37);

[0043] This then drives the stripping knife 11 to move toward the middle and insert it into the coating layer on the plastic-coated wire, and drives the round rod 12 to slide into the straight groove 39, while compressing the lower spring 17. Then, under the pull of the clamping claw drive mechanism 2, the stripping knife 11 will scrape off the coating layer on the other end of the plastic-coated wire. At this time, the side end of the movable frame 10 slides in the extrusion groove 38, and then the inclined surface of the side end of the extrusion groove 38 moves to the side of the movable frame 10, and then the inclined surface of the side wall of the extrusion groove 38 further squeezes the movable frame 10 to move toward the closer side, so that the stripping knife 11 continues to move toward the middle, thereby cutting off the plastic-coated wire, and then the drive motor 18 can be controlled to reverse and drive the drive block 20 to move, thereby repeating the above operation in reverse to reset.

[0044] The basic principles, main features and advantages of the present invention are shown and described above.

[0045] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A device for testing the peeling force of a coating layer of a plastic-coated silk, comprising a test bench (1), and a clamping claw drive mechanism (2) arranged on the test bench (1) for pulling the plastic-coated silk for testing, characterized in that: The top of the test bench (1) is fixedly connected to a fixed frame (3), a mounting plate (4) is mounted on the fixed frame (3) by means of bolts, a stripping die (5) is mounted on the mounting plate (4) by means of bolts, a placement seat (6) for placing the plastic-coated wire is fixedly connected to the top of the fixed frame (3), a hydraulic clamping jaw (7) is provided on the top of the fixed frame (3) and on the side away from the stripping die (5), a pair of L-shaped plates (8) are fixedly connected between the placement seat (6) and the stripping die (5) at the top of the fixed frame (3), and the fixed frame (3) is fixedly connected to the stripping die (5). A pair of slide grooves are provided between the top of the fixed frame (3) and the L-shaped plate (8), and a straight plate (9) is slidably connected to the inner side of the slide groove. The tops of the side walls of the two straight plates (9) are penetrated by a movable frame (10) that is slidably connected. The two movable frames (10) are both installed with a stripping knife (11) for stripping the coating layer on the plastic-coated wire by bolts on the adjacent side. The fixed frame (3) is provided with a driving mechanism for driving the two straight plates (9) to slide, and the two L-shaped plates (8) are provided with a stripping mechanism for adjusting the position of the stripping knife (11).

2. The device for testing the peeling force of a coating layer of a plastic-coated silk according to claim 1, characterized in that: The stripping mechanism comprises a round rod (12), and the round rod (12) is connected to the bottom end of the movable frame (10) by sliding, the top of the L-shaped plate (8) is provided with a U-shaped groove (13), and one end of the U-shaped groove (13) is longer than the other end, an inclined groove (14) is provided between the two ends of the U-shaped groove (13), the bottom end of the inclined groove (14) is provided with an inward groove (15), the connection between the groove (15) and the inclined groove (14) is inclined, the bottom end of the round rod (12) is inserted into the inner side of the groove (15), an upper spring (16) is fixedly connected between the outer wall of the round rod (12) and the bottom end of the movable frame (10), a pair of lower springs (17) are fixedly connected between the inner side of the movable frame (10) and the outer wall of the straight plate (9), and the bottom end of the round rod (12) is provided with a smooth arc surface.

3. The device for testing the peeling force of a coating layer of a plastic-coated silk according to claim 1, characterized in that: The stripping knives (11) on the side walls of the two movable frames (10) are arranged in a staggered manner, and a push spring (29) is fixedly connected between the inner side of the slide groove and the straight plate (9).

4. The device for testing the peeling force of a coating layer of a plastic-coated silk according to claim 1, characterized in that: The driving mechanism comprises a driving motor (18), a threaded rod (19) is rotatably connected to the inner side of the fixing frame (3), the driving motor (18) is fixedly connected to the side wall of the fixing frame (3), the output end of the driving motor (18) passes through the inner side of the fixing frame (3) and is fixedly connected to the end of the threaded rod (19), the bottom end of the fixing frame (3) is slidably connected to a driving block (20) relative to the position below the placement seat (6), and the threaded rod (19) is threadedly connected to the inner side wall of the driving block (20), a top groove is provided at the top of the driving block (20), both ends of the top groove are slidably connected to a fixing seat (21), the inner sides of the two fixing seats (21) are rotatably connected to a top plate (22), the top end of the fixing frame (3) is fixedly connected to an extrusion plate (24) relative to the two fixing seats (21), and both sides of the top of the extrusion plate (24) are provided with a release groove (25), and the top end of the fixing frame (3) is provided with an upper groove relative to the position below the hydraulic clamp (7).

5. The device for testing the peeling force of the coating layer of plastic-coated silk according to claim 4, characterized in that: The side end of the release groove (25) is tilted, and the side wall of the top plate (22) is tilted and fixedly connected with an inclined plate (23) on the side away from the straight plate (9), and the bottom of the inclined plate (23) abuts against the inner bottom end of the fixed seat (21), and a return spring (26) is fixedly connected between the bottom end of the inclined plate (23) and the inner bottom end of the fixed seat (21), and the top ends of the two fixed seats (21) are fixedly connected with an extrusion rod (27) on the side close to each other, and a return spring (28) is fixedly connected between the two fixed seats (21).

6. The device for testing the peeling force of a coating layer of a plastic-coated silk according to claim 1, characterized in that: A bottom groove is provided at the bottom end of the side wall of the placement seat (6), and an L-shaped support frame (30) for supporting the end of the plastic-coated wire is slidably connected to the inner side of the bottom groove, and a tension spring (31) is fixedly connected between the inner side of the bottom groove and the side wall of the L-shaped support frame (30). The two straight plates (9) are fixedly connected to the side close to each other with a side plate (32) for pushing the L-shaped support frame (30) to move. A material guide groove is inclined at the top end of the L-shaped support frame (30), and a lower groove is provided at the bottom end of the side wall of one of the L-shaped plates (8). The top end of the fixed frame (3) is fixedly connected to a right-angle block (33) with an inclined surface at a position relative to the lower groove.

7. The device for testing the peeling force of a coating layer of a plastic-coated silk according to claim 4, characterized in that: A bottom rod (35) is fixedly connected to the lower portion of the hydraulic clamp (7) relative to the position in the upper groove; an L-shaped push plate (34) is fixedly connected to the side wall of the driving block (20) for pushing the bottom rod (35) to move; a loading spring (36) is fixedly connected between the side wall of the placement seat (6) and the side wall of the hydraulic clamp (7); push plates (37) are fixedly connected to both sides of the outer wall of the hydraulic clamp (7); an extrusion groove (38) is provided on the side close to each other of the two push plates (37); and the connection between the side wall of the push plate (37) and the extrusion groove (38) is inclined, and the inner side of the extrusion groove (38) is inclined.

8. The device for testing the peeling force of a coating layer of a plastic-coated silk according to claim 2, characterized in that: The side away from each other of the two movable frames (10) is set as a smooth arc surface, and the long end of the U-shaped groove (13) is provided with a straight groove (39), and the bottom end of the straight groove (39) is flush with the bottom end of the groove (15).

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