Cutting device of PI pipe for plastic extruding machine

Abstract

The invention belongs to the technical field of cutting devices, and particularly relates to a PI pipe cutting device for a plastic extruding machine, which comprises a bottom plate, an annular bracket is fixedly connected to the upper end surface of the bottom plate, a supporting bracket is rotatably connected to an inner cavity of the annular bracket, gear rings are fixedly connected to two ends of the supporting bracket, and a threaded sleeve is rotatably connected to the upper end of the supporting bracket. An inner cavity of the threaded sleeve is rotationally connected with a lead screw barrel, the lower end of the lead screw barrel fixedly communicates with a U-shaped fixing frame, and the lower end of the U-shaped fixing frame fixedly communicates with a second cutting knife. The problems that limiting assemblies are not arranged between the two clamping rollers and located on the two sides of the PI pipe, if the PI pipe is pushed to move between the two clamping rollers, the PI pipe moves and deviates between the two clamping rollers, a cutting knife conducts annular rotating cutting, and if the center point of the PI pipe is not located on the center point where the cutting knife conducts annular rotating cutting, the PI pipe is not limited by the limiting assemblies are solved. The problem that the quality of the PI pipe is affected due to the fact that the cut PI pipe orifice is not smooth and the length of the cut PI pipe is deviated is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting devices, in particular to a PI tube cutting device for an extruder. Background Art

[0002] PI tube is a tubular product made of polyimide fiber as the main material. Polyimide is a high-performance engineering plastic with excellent heat resistance, chemical resistance, mechanical properties and electrical insulation properties. It has a high glass transition temperature and can maintain stable performance in high temperature environments. The existing PI tube needs to be cut with cutting equipment after production, and the PI tube is cut into the length required by the customer and then packaged and shipped.

[0003] A patent with publication number CN113580242B discloses a plastic pipe cutting device for an extruder. The patent sets a first track and a third track symmetrically along the center line of the second track. Two rollers abut the first track and the third track respectively. As the cutting assembly rotates, the cutter gradually contacts the plastic pipe and cuts into the plastic pipe, and finally rotates to cut the plastic pipe. The rack is set to move, driving the slider to move in the slide slot until the rollers on the two cutting assemblies are located on the inner wall of the second track, and the worm is set to rotate to drive the turbine to rotate, so that After cutter one rotates until the angle with the support frame is 90°, motor one starts, driving the two sets of drive components to rotate, so that cutter one cuts the end of the plastic tube to expand the inner diameter, and cutter two cuts the outer wall of the end of the adjacent plastic tube, finally obtaining a plastic tube with an enlarged inner diameter at one end and a reduced outer diameter at the other end, so that the plastic tube can be inserted into another adjacent plastic tube, solving the problem that the ends of the existing plastic tubes are flat, workers are easily misaligned when winding the tape, and the axes of the two adjacent plastic tubes are not coaxial, forming an angle, causing the adjacent plastic tubes to bend after winding.

[0004] There are still some problems in the actual application of the above scheme. When cutting the PI tube, a clamping roller is usually used to hold up the PI tube from the bottom, and then another clamping roller is used to clamp the PI tube from the top, so as to facilitate the PI tube to be transported and moved between the two clamping rollers. However, there is no limit component between the two clamping rollers and on both sides of the PI tube. If the PI tube is pushed to move between the two clamping rollers, the PI tube will move and deviate between the two clamping rollers, and the cutting knife is cut in a circular rotation. If the center point of the PI tube is not at the center point of the circular rotation cutting of the cutting knife, the cut PI tube mouth will be rough, and the length of the cut PI tube will also deviate, affecting the quality of the PI tube.

[0005] To this end, the present invention provides a cutting device for a PI tube used in an extruder. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a PI tube cutting device for an extruder described in the present invention comprises a bottom plate, an annular bracket is fixedly connected to the upper end surface of the bottom plate, a support bracket is rotatably connected to the inner cavity of the annular bracket, gear rings are fixedly connected to both ends of the support bracket, a threaded sleeve is rotatably connected to the upper end of the support bracket, a screw barrel is rotatably connected to the inner cavity of the threaded sleeve, a U-shaped fixing bracket is fixedly connected to the lower end of the screw barrel, a second cutting knife is fixedly connected to the lower end of the U-shaped fixing bracket, and a plurality of PI tube limit assemblies are installed on the upper end surface of the bottom plate; The PI tube limiting assembly includes a plurality of first T-shaped brackets fixedly connected to the upper end surface of the bottom plate, a first slide groove is provided on the upper ends of the plurality of first T-shaped brackets, two first sliders are slidably connected in the inner cavity of the first slide groove, and a first semicircular clamping roller a is rotatably connected in the upper ends of the two first sliders, and a second semicircular clamping roller a is rotatably connected inside the upper ends of the first semicircular clamping roller a.

[0008] Preferably, two fixed sliding columns are fixedly connected to the inner cavity of the first slide groove, and each first sliding block is slidably connected to each fixed sliding column, a spring is fixedly connected to one side of the first sliding block, and one end of the spring is fixedly connected to the inner wall of the first slide groove, a first receiving groove is opened at the upper end of the first semicircular clamping roller a, a first tension spring is fixedly connected to the bottom of the inner cavity of the first receiving groove, and one end of the first tension spring is fixedly connected to the second semicircular clamping roller a.

[0009] Preferably, the upper end of the screw tube is fixedly connected to a vacuum cleaner, and the vacuum cleaner is a handheld wireless vacuum cleaner, the dust outlet of the vacuum cleaner is fixedly connected to a dust extraction duct, and one end of the dust extraction duct is fixedly connected to a collecting tube, and the collecting tube is installed on the supporting bracket.

[0010] Preferably, two fixing frames are symmetrically installed on the upper end surface of the base plate, and a servo motor is installed between the two fixing frames. The output shaft end of the servo motor is fixedly connected to a gear disk, and the gear disk is meshingly connected with the gear ring. A collecting groove is opened on the upper end of the base plate, and a recycling box is installed at the lower end of the collecting groove.

[0011] Preferably, a PI tube clamping assembly is installed on the upper end surface of the base plate, and the PI tube clamping assembly includes a second T-shaped bracket installed on the upper end surface of the base plate, a second slide groove is opened on the upper end of the second T-shaped bracket, two second sliders are slidably connected to the inner cavity of the second slide groove, and the first semicircular clamping roller b is rotatably connected to the upper ends of the two second sliders, and the second semicircular clamping roller b is rotatably connected to the upper end of the first semicircular clamping roller b, and a plurality of rubber anti-slip strips are evenly arranged on the outside of the first semicircular clamping roller b and the second semicircular clamping roller b.

[0012] Preferably, a second receiving groove is opened at the upper end of the first semicircular clamping roller b, a second tension spring is fixedly connected to the bottom of the inner cavity of the second receiving groove, one end of the second tension spring is fixedly connected to the second semicircular clamping roller b, and the first semicircular clamping roller b and the second semicircular clamping roller b are used to clamp the PI tube.

[0013] Preferably, a bidirectional threaded rod is rotatably connected to the inner cavity of the second slide groove, and two of the second sliding blocks are threadedly connected to the bidirectional threaded rod. One end of the bidirectional threaded rod passes through the second T-shaped bracket and is fixed with a crank. Grooves are provided at the upper ends of the second T-shaped bracket and the first T-shaped bracket, and a rubber roller is rotatably connected to the inner cavity of the groove.

[0014] Preferably, two first cutting knives are rotatably connected to the inner cavity of the U-shaped fixing frame, and one end of the two first cutting knives passes through the U-shaped fixing frame and is fixedly connected to a first bevel gear, one end of the U-shaped fixing frame is symmetrically fixedly connected to two supporting blocks, and the two supporting blocks are rotatably connected to a second rotating shaft, both ends of the second rotating shaft are fixedly connected to a second bevel gear, and the second bevel gear is meshingly connected to the first bevel gear.

[0015] Preferably, two support blocks are symmetrically fixed to one end of the U-shaped fixing frame, and the two support blocks are rotatably connected to the first rotating shaft, three third bevel gears are fixed to the outside of the first rotating shaft, and the third bevel gears located at both ends of the first rotating shaft are meshingly connected to the second bevel gears, a driving motor is arranged in one end of the U-shaped fixing frame, and the output shaft of the driving motor is fixedly connected to a transmission bevel gear, and the transmission bevel gear is meshingly connected to the third bevel gears.

[0016] Preferably, grinding sheets are provided on both sides of the U-shaped fixing frame, and grinding sheets are also provided on both sides of the second cutting knife, and multiple dust suction ports are evenly opened on both sides of the second cutting knife, and the dust suction ports are connected to the inner cavity of the second cutting knife, and the inner cavity of the second cutting knife is connected to the inner cavity of the screw barrel.

[0017] The beneficial effects of the present invention are as follows: 1. The PI tube cutting device for an extruder described in the present invention, when cutting the PI tube, drives the threaded sleeve to rotate, and the threaded sleeve drives the U-shaped fixing frame to drive the first cutting knife to move downward, and the first cutting knife is fitted with the surface of the PI tube, and at the same time drives the support bracket to drive the first cutting knife to cut the PI tube, and at the same time, the waste cut off from the PI tube can be used for processing pipe fittings later, and after the middle part of the PI tube is cut off, the U-shaped fixing frame slides between the PI tubes, and then drives the two first cutting knives to rotate, so that the first cutting knives are turned over at a flat angle, and then drives the support bracket to drive the U-shaped fixing frame to rotate. The fixed frame rotates one circle again, and then the first cutting knife is used to cut the butt joint groove on the inner wall of the PI tube, thereby solving the problem that the existing PI tube cutting device for the extruder usually uses the cutting knife to cut a whole PI tube into two or more pipe fittings when cutting the PI tube, and then cuts the butt joint groove at one end of the two or more pipe fittings, and conversely cuts the butt joint at the other end to facilitate the installation between the two pipe fittings. However, since the cutting knife cannot cut the butt joint groove and the butt joint of the PI tube at the same time when cutting the whole PI tube into two or more pipe fittings, the operation is cumbersome and the PI tube cutting is not efficient enough.

[0018] 2. The PI tube cutting device for an extruder described in the present invention allows the PI tube produced by the extruder to enter between the PI tube limit assemblies after being cooled and solidified by the cooling device. Then, as the PI tube after being cooled and solidified by the cooling device enters, the PI tube moves between the two first semicircular clamping rollers a and enters the inner cavity of the annular bracket. Then, the screw barrel is driven to push the U-shaped fixing frame to move downward, and then the U-shaped fixing frame drives the second cutting knife to move downward, so as to fit with the surface of the PI tube. Then, the support bracket is driven to drive the screw barrel to rotate, and then the second cutting knife is driven to move synchronously, so that the second cutting knife rotates around the PI tube and cuts it in an annular shape, thereby solving the existing When the cutting device of the PI tube for the extruder cuts the PI tube, a clamping roller is usually used to lift the PI tube from the bottom, and then another clamping roller is used to clamp the PI tube from the top, so as to facilitate the PI tube to be transported and moved between the two clamping rollers. However, there are no limit components between the two clamping rollers and on both sides of the PI tube. If the PI tube is pushed to move between the two clamping rollers, the PI tube will move and deviate between the two clamping rollers, and the cutting knife cuts in a circular rotation. If the center point of the PI tube is not at the center point of the circular rotation cutting of the cutting knife, the cut PI tube mouth will be rough and the length of the cut PI tube will also deviate, affecting the quality of the PI tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1This is a schematic diagram of the processing structure of the PI tube of the present invention; Figure 2 It is a schematic diagram of the overall structure of the rear view of the present invention; Figure 3 It is a schematic diagram of a half-section structure of a first T-shaped bracket of the present invention; Figure 4 It is a structural schematic diagram of the installation of the gear ring of the present invention; Figure 5 It is a schematic diagram of the overall structure of the support bracket of the present invention; Figure 6 It is a schematic diagram of the installation structure of the second cutting knife of the present invention; Figure 7 It is a schematic diagram of a half-section structure of a second T-shaped bracket of the present invention; Figure 8 This is a schematic diagram of the structure of a half-cut PI tube of the present invention; Fig. 9 This is a schematic diagram of the installation structure of the bottom plate of the present invention from a top view; In the figure: 1. Base plate; 2. PI tube limit assembly; 201, first T-shaped bracket; 202, first slide groove; 203, fixed slide column; 204, first slide block; 205, spring; 206, first semicircular clamping roller a; 207, first receiving groove; 208, first tension spring; 209, second semicircular clamping roller a; 3. Collection tank; 4. PI tube clamping assembly; 401, second T-shaped bracket; 402, second slide groove; 403, bidirectional threaded rod; 404, second slider; 405, first semicircular clamping roller b; 406, second receiving groove; 407, second tension spring; 408, second semicircular clamping roller b; 409, rubber anti-slip strip; 410, crank; 5. Support bracket; 6. Fixed frame; 7. Servo motor; 8. Annular bracket; 9. Toothed disc; 10. Gear ring; 11. Collecting cylinder; 12. PI tube; 13. Groove; 14. Rubber roller; 15. Dust extraction duct; 16. Vacuum cleaner; 17. Screw barrel; 18. Threaded sleeve; 19. U-shaped fixed frame; 20. First cutting knife; 21. Second cutting knife; 22. Dust suction port; 23. First bevel gear; 24. Second bevel gear; 25. Support block; 26. Third bevel gear; 27. First rotating shaft; 28. Driving motor; 29. ​​Transmission bevel gear; 30. Second rotating shaft; 31. Grinding disc. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] Example:

[0023] like Figures 1 to 9 As shown, a PI tube cutting device for an extruder according to an embodiment of the present invention comprises a bottom plate 1, an annular bracket 8 is fixedly connected to the upper end surface of the bottom plate 1, a support bracket 5 is rotatably connected to the inner cavity of the annular bracket 8, gear rings 10 are fixedly connected to both ends of the support bracket 5, a threaded sleeve 18 is rotatably connected to the upper end of the support bracket 5, a screw barrel 17 is rotatably connected to the inner cavity of the threaded sleeve 18, a U-shaped fixing frame 19 is fixedly connected to the lower end of the screw barrel 17, a second cutting knife 21 is fixedly connected to the lower end surface of the U-shaped fixing frame 19, and a plurality of PI tube limiting assemblies 2 are installed on the upper end surface of the bottom plate 1; The PI tube limiting assembly 2 includes a plurality of first T-shaped brackets 201 fixedly connected to the upper end surface of the base plate 1, and a first slide groove 202 is provided on the upper ends of the plurality of first T-shaped brackets 201. Two first sliders 204 are slidably connected to the inner cavity of the first slide groove 202, and the upper ends of the two first sliders 204 are rotatably connected to the first semicircular clamping roller a206, and the upper ends of the first semicircular clamping roller a206 are rotatably connected to the second semicircular clamping roller a209.

[0024] Specifically, in the prior art, when cutting the PI tube, a clamping roller is usually used to hold up the PI tube from the bottom, and then another clamping roller is used to clamp the PI tube from the top, so as to facilitate the PI tube to be transported and moved between the two clamping rollers. However, there is no limit assembly between the two clamping rollers and on both sides of the PI tube. If the PI tube is pushed to move between the two clamping rollers, the PI tube will move and deviate between the two clamping rollers, and the cutting knife is cut in a circular rotation. If the center point of the PI tube is not at the center point of the circular rotation cutting of the cutting knife, the cut PI tube mouth will be uneven, and the length of the cut PI tube will also be deviated, affecting the quality of the PI tube. After the PI tube produced by the extruder is cooled and solidified by the cooling device, the PI tube is allowed to enter between the two first semicircular clamping rollers a206, and the two first semicircular clamping rollers a206 clamp and limit the PI tube, thereby preventing the PI tube from moving and deviating when the PI tube is transported into the cutting device, thereby affecting the PI tube cutting operation of the cutting device. When clamping and limiting the PI tube with a larger diameter, the two first semicircular clamping rollers a206 are driven to move closer to each other, thereby clamping and limiting the PI tube, and the two first semicircular clamping rollers a206 clamp and limit the PI tube. When one semicircular clamping roller a206 moves toward each other, it will drive the two second semicircular clamping rollers a209 to move synchronously, and the two second semicircular clamping rollers a209 clamp and limit the PI tube, so that the PI tube is guaranteed to be in the middle of the first T-shaped bracket 201. Then, as the PI tube enters after being cooled and solidified by the cooling equipment, the PI tube moves between the two first semicircular clamping rollers a206 and enters the inner cavity of the annular bracket 8, and then drives the threaded sleeve 18 to rotate, and the threaded sleeve 18 thread transmission screw barrel 17 moves downward, and at the same time, the screw barrel 17 pushes the U-shaped fixing frame The U-shaped fixing frame 19 moves downward, thereby causing the U-shaped fixing frame 19 to drive the second cutting knife 21 to move downward, thereby fitting with the surface of the PI tube, and then driving the gear ring 10 to rotate, and causing the gear ring 10 to drive the supporting bracket 5 to rotate, while the supporting bracket 5 drives the screw barrel 17 to rotate, thereby causing the screw barrel 17 to drive the U-shaped fixing frame 19 to move, and then driving the second cutting knife 21 to move synchronously, so that the second cutting knife 21 rotates around the PI tube and cuts it in a ring shape, thereby solving the problem that the existing PI tube cutting device for extruders usually uses a clamping roller to lift the PI tube from the bottom when cutting the PI tube. I tube, and then use another clamping roller to clamp the PI tube from the top, so as to facilitate the PI tube to be transported and moved between the two clamping rollers. However, there are no limit components between the two clamping rollers and on both sides of the PI tube. If the PI tube is pushed to move between the two clamping rollers, the PI tube will move and deviate between the two clamping rollers, and the cutting knife is a circular rotating cutting. If the center point of the PI tube is not at the center point of the circular rotating cutting of the cutting knife, the cut PI tube mouth will be rough, and the length of the cut PI tube will also deviate, affecting the quality of the PI tube.

[0025] like Figure 1 and Figure 3 As shown, two fixed slide posts 203 are fixedly connected to the inner cavity of the first slide groove 202, and each first slider 204 is slidably connected to each fixed slide post 203, a spring 205 is fixedly connected to one side of the first slider 204, and one end of the spring 205 is fixedly connected to the inner wall of the first slide groove 202, a first receiving groove 207 is opened at the upper end of the first semicircular clamping roller a206, a first tension spring 208 is fixedly connected to the bottom of the inner cavity of the first receiving groove 207, and one end of the first tension spring 208 is fixedly connected to the second semicircular clamping roller a209.

[0026] Specifically, after the PI tube produced by the extruder is cooled and solidified by the cooling equipment, it is pushed between the two first semicircular clamping rollers a206, and then the first slider 204 is bounced up by the spring 205 to slide on the outside of the fixed sliding column 203 and move close to each other, so that the first slider 204 drives the first semicircular clamping rollers a206 to move close to each other, thereby clamping and limiting the PI tube. When clamping the PI tube with a larger diameter, the PI tube will move between the first semicircular clamping rollers a206, and the PI tube will lift the second semicircular clamping roller a209 to slide in the inner cavity of the first receiving groove 207. At the same time, the second semicircular clamping roller a209 pulls the first tension spring 208 to expand, and then the tension of the first tension spring 208 is used to pull the second semicircular clamping roller a209 downward, so that the second semicircular clamping roller a209 cooperates with the first semicircular clamping roller a206 to clamp and limit the two ends of the PI tube, thereby ensuring the stable transportation of the second semicircular clamping roller a209 and improving the cutting efficiency of the PI tube.

[0027] like Figure 1 , Figure 4 and Figure 5 As shown, the upper end of the screw tube 17 is fixedly connected to a vacuum cleaner 16, and the vacuum cleaner 16 is a handheld wireless vacuum cleaner. The dust exhaust port of the vacuum cleaner 16 is fixedly connected to a dust extraction duct 15, and one end of the dust extraction duct 15 is fixedly connected to a collecting tube 11, and the collecting tube 11 is installed on the support bracket 5.

[0028] Specifically, in the process of driving the support bracket 5 to drive the second cutting knife 21 to cut the PI tube, the air in the inner cavity of the screw barrel 17 is extracted by starting the vacuum cleaner 16, and then the air in the inner cavity of the second cutting knife 21 is extracted through the inner cavity of the screw barrel 17, and then when the second cutting knife 21 cuts the PI tube, the waste chips and dust generated by the cutting of the PI tube can be extracted, and then discharged into the inner cavity of the dust extraction duct 15, and then discharged into the inner cavity of the collecting tube 11 by the dust extraction duct 15 for collection, thereby solving the problem that a large amount of waste chips and dust will be generated during the cutting process of the PI tube by the existing cutting device for the PI tube of the extruder. If they are not cleaned and collected, these waste chips and dust will remain in the PI tube and on the workbench, and some of the waste chips and dust will float into the cutting equipment under the influence of the air, accumulate in the cutting equipment for a long time, and cause damage to the cutting equipment. In addition, the dust floating with the air will also cause safety hazards to the operator.

[0029] like Figure 1 , Figure 2 and Figure 4 As shown, two fixing frames 6 are symmetrically installed on the upper end surface of the base plate 1, and a servo motor 7 is installed between the two fixing frames 6. The output shaft end of the servo motor 7 is fixedly connected to a gear plate 9, and the gear plate 9 is meshingly connected with a gear ring 10. A collecting groove 3 is opened at the upper end of the base plate 1, and a recycling box is installed at the lower end of the collecting groove 3.

[0030] Specifically, when the PI tube is cut, the servo motor 7 is started to drive the toothed disc 9 to rotate, and the toothed disc 9 drives the gear ring 10 to rotate. During the rotation of the gear ring 10, the support bracket 5 is driven to rotate, and the support bracket 5 drives the cutting device to rotate synchronously, and the PI tube is cut at the same time. The waste pipe material generated by the PI tube cutting will fall into the collecting groove 3 at the upper end of the bottom plate 1 and enter the recycling box for recycling, so that it can be used as a joint of two pipe fittings in the future, thereby improving the practicality and convenience of the cutting device.

[0031] Example:

[0032] like Figure 1 , Figure 7 and Fig. 9 As shown, a PI pipe clamping assembly 4 is installed on the upper end surface of the base plate 1, and the PI pipe clamping assembly 4 includes a second T-shaped bracket 401 installed on the upper end surface of the base plate 1, a second slide groove 402 is opened on the upper end of the second T-shaped bracket 401, two second sliders 404 are slidably connected to the inner cavity of the second slide groove 402, and the upper ends of the two second sliders 404 are rotatably connected with a first semicircular clamping roller b405, and the upper ends of the first semicircular clamping roller b405 are rotatably connected with a second semicircular clamping roller b408, and a plurality of rubber anti-slip strips 409 are evenly arranged on the outside of the first semicircular clamping roller b405 and the second semicircular clamping roller b408.

[0033] like Figure 1 , Figure 7 and Figure 8 As shown, a second receiving groove 406 is opened at the upper end of the first semicircular clamping roller b405, a second tension spring 407 is fixedly connected to the bottom of the inner cavity of the second receiving groove 406, one end of the second tension spring 407 is fixedly connected to the second semicircular clamping roller b408, and the first semicircular clamping roller b405 and the second semicircular clamping roller b408 are used to clamp the PI tube 12.

[0034] like Figure 7 and Fig. 9 As shown, the inner cavity of the second slide groove 402 is rotatably connected to the bidirectional threaded rod 403, the two second sliders 404 are threadedly connected to the bidirectional threaded rod 403, one end of the bidirectional threaded rod 403 passes through the second T-shaped bracket 401 and is fixedly connected to the crank 410, the upper ends of the second T-shaped bracket 401 and the first T-shaped bracket 201 are both provided with a groove 13, and the inner cavity of the groove 13 is rotatably connected to the rubber roller 14.

[0035] Specifically, when the PI tube 12 is cut, the PI tube is transported into the PI tube limiting assembly 2, and the PI tube limiting assembly 2 clamps and limits the PI tube 12. When the PI tube 12 needs to be cut, the crank 410 is driven to rotate, and the bidirectional threaded rod 403 is driven to rotate. At the same time, the bidirectional threaded rod 403 threadedly drives the two second sliders 404 to move closer to each other. When the two second sliders 404 move closer to each other, the first semicircular clamping roller b405 is driven to move synchronously. At the same time, the first semicircular clamping roller b405 drives the second semicircular clamping roller b408 to move closer to each other, so that the first semicircular clamping roller b405 cooperates with the second semicircular clamping roller b408 to clamp and fix the PI tube 12, and the first semicircular clamping roller b405 A plurality of rubber anti-slip strips 409 are arranged on the outside of the second semicircular clamping roller b408, so that the rubber anti-slip strips 409 can be used to clamp and fix the PI tube 12 to prevent the first cutting knife 20 or the second cutting knife 21 from driving the PI tube 12 to cut in a ring shape around the PI tube 12, causing the first cutting knife 20 or the second cutting knife 21 to drive the PI tube 12 to rotate, thereby affecting the cutting efficiency of the PI tube 12, thereby solving the problem that when the cutting device of the PI tube for the existing extruder is cutting the PI tube, if the cut end of the PI tube is not clamped and fixed during the cutting process of the PI tube, the cut end of the PI tube will move when the cutting knife cuts off the cut end of the PI tube, causing the cut end of the PI tube to crack and become unusable along the incision of the cutting knife.

[0036] like Figure 5 and Figure 6 As shown, two first cutting knives 20 are rotatably connected to the inner cavity of the U-shaped fixing frame 19, and one end of the two first cutting knives 20 passes through the U-shaped fixing frame 19 and is fixedly connected to the first bevel gear 23, one end of the U-shaped fixing frame 19 is symmetrically fixedly connected to two supporting blocks 25, and the two supporting blocks 25 are rotatably connected inside with a second rotating shaft 30, both ends of the second rotating shaft 30 are fixedly connected to the second bevel gear 24, and the second bevel gear 24 is meshingly connected to the first bevel gear 23.

[0037] like Figure 5 and Figure 6 As shown, two support blocks 25 are symmetrically fixed to one end of the U-shaped fixing frame 19, and the two support blocks 25 are rotatably connected to the first rotating shaft 27 inside, three third bevel gears 26 are fixed to the outside of the first rotating shaft 27, and the third bevel gears 26 located at both ends of the first rotating shaft 27 are meshed and connected with the second bevel gear 24, a driving motor 28 is arranged in one end of the U-shaped fixing frame 19, and the output shaft of the driving motor 28 is fixed to a transmission bevel gear 29, and the transmission bevel gear 29 is meshed and connected with the third bevel gear 26.

[0038] Specifically, when the PI tube 12 is cut, the threaded sleeve 18 is driven to rotate, and the threaded sleeve 18 thread drive screw barrel 17 is moved downward, and the screw barrel 17 pushes the U-shaped fixing frame 19 to move downward, so that the U-shaped fixing frame 19 drives the first cutting knife 20 to move downward, and the first cutting knife 20 is fitted with the surface of the PI tube 12, and the support bracket 5 is driven to rotate, so that the support bracket 5 drives the U-shaped fixing frame 19 to rotate synchronously, and then the first cutting knife 20 is used to cut the PI tube 12, so that the PI tube 12 is cut. Figure 8 The U-shaped fixing frame 19 slides into the middle of the PI tube 12, and then starts the driving motor 28 to drive the transmission bevel gear 29 to rotate, and makes the transmission bevel gear 29 mesh with the third bevel gear 26 to rotate, and then drives the first rotating shaft 27 to rotate. During the rotation of the first rotating shaft 27, the two third bevel gears 26 are driven to rotate, and the second bevel gear 24 is meshed to rotate, and then the second rotating shaft 30 is driven to rotate. During the rotation of the second rotating shaft 30, the second bevel gear 24 is driven to mesh with the first bevel gear 23 to rotate, and then the first bevel gear 23 drives the two first cutting knives 20 to rotate, so that the first cutting knife 20 is turned over at a flat angle, and then the driving support bracket 5 drives the U-shaped fixing frame 19 to rotate again, and then the first cutting knife 20 is used to cut the inner wall of the PI tube 12 into a docking groove as shown in FIG. Figure 8 As shown, the vacuum cleaner 16 is used in conjunction with the second cutting knife 21 to extract and collect the dust generated by the first cutting knife 20 cutting the docking groove of the PI tube 12, so as to improve the cleanliness of the cutting device, thereby solving the problem that the existing PI tube cutting device for the extruder usually uses the cutting knife to cut a whole PI tube into two or more pipe fittings when cutting the PI tube, and then cuts the docking groove at one end of the two or more pipe fittings, and conversely cuts the docking joint at the other end to facilitate the installation between the two pipe fittings. However, since the cutting knife cannot cut the docking groove and the docking joint of the PI tube at the same time when cutting the whole PI tube into two or more pipe fittings, the operation is cumbersome and the PI tube cutting is not efficient enough.

[0039] like Figure 5 and Figure 6 As shown, grinding sheets 31 are provided on both sides of the U-shaped fixing frame 19, and grinding sheets 31 are also provided on both sides of the second cutting knife 21, and multiple dust suction ports 22 are evenly opened on both sides of the second cutting knife 21, and the dust suction ports 22 are connected to the inner cavity of the second cutting knife 21, and the inner cavity of the second cutting knife 21 is connected to the inner cavity of the screw barrel 17.

[0040] Specifically, after the U-shaped fixing frame 19 slides into between the PI tubes 12, the support bracket 5 is driven to rotate again, and the support bracket 5 drives the U-shaped fixing frame 19 to rotate, and grinding sheets 31 are provided on both sides of the U-shaped fixing frame 19, so that the grinding sheets 31 can be used to grind the two ends of the PI tube 12 to prevent a large amount of plastic burrs from remaining on the surface of the PI tube 12 after cutting. If it is not polished, a large amount of plastic burrs will affect the sealing of the later pipe fittings after connection. When cutting the butt joint of the PI tube 12, the first cutting knife 20 turned into a right angle is fitted with the surface of the PI tube 12, and the second cutting knife 21 is used to cut the PI tube 12 to form two pipe fittings, and then the second cutting knife 21 is used to cut the PI tube 12 to form two pipe fittings. A cutting knife 20 is fitted to the surfaces of two pipe fittings to cut out a butt joint. During the process of the second cutting knife 21 cutting the PI pipe 12, the grinding sheets 31 on both sides of the second cutting knife 21 are used to grind the cut port, and the dust generated by grinding is extracted and collected by the dust suction port 22, thereby improving the practicability of the cutting device and solving the problem that when the existing PI pipe cutting device for an extruder cuts the PI pipe, it is usually necessary to grind the cut port with an external grinding device after the PI pipe is cut by the cutting knife, so as to prevent a large amount of plastic burrs from remaining on the surface of the PI pipe after cutting. If it is not polished away, a large amount of plastic burrs will affect the sealing problem after the subsequent pipe fittings are connected.

[0041] Working principle: after the PI tube produced by the extruder is cooled and solidified by the cooling equipment, the PI tube is allowed to enter between the two first semicircular clamping rollers a206, and the two first semicircular clamping rollers a206 clamp and limit the PI tube, thereby preventing the PI tube from moving and deviating when conveying the PI tube into the cutting equipment, thereby affecting the PI tube cutting operation of the cutting equipment; when clamping and limiting the PI tube with a larger diameter, the two first semicircular clamping rollers a206 are driven to move close to each other, thereby clamping and limiting the PI tube; and in the process of the two first semicircular clamping rollers a206 moving close to each other, the two second semicircular clamping rollers a209 are driven to move synchronously, and the two second semicircular clamping rollers a209 clamp and limit the PI tube, thereby ensuring that the PI tube is The middle part of the first T-shaped bracket 201, and then as the PI tube enters after being cooled and solidified by the cooling equipment, the PI tube moves between the two first semicircular clamping rollers a206 and enters the inner cavity of the annular bracket 8, and then drives the threaded sleeve 18 to rotate, and the threaded sleeve 18 thread transmission screw barrel 17 moves downward, and at the same time, the screw barrel 17 pushes the U-shaped fixing frame 19 to move downward, and then the U-shaped fixing frame 19 drives the second cutting knife 21 to move downward, so as to fit with the surface of the PI tube, and then drives the ring gear 10 to rotate, and the ring gear 10 drives the support bracket 5 to rotate, and at the same time, the support bracket 5 drives the screw barrel 17 to rotate, and then the screw barrel 17 drives the U-shaped fixing frame 19 to move, and then drives the second cutting knife 21 to move synchronously, so that the second cutting knife 21 rotates around the PI tube and cuts it in a ring shape; After the U-shaped fixing frame 19 slides into the PI tubes 12, the support bracket 5 is driven to rotate again, and the support bracket 5 drives the U-shaped fixing frame 19 to rotate. Grinding sheets 31 are provided on both sides of the U-shaped fixing frame 19, and the grinding sheets 31 can be used to grind the two ends of the PI tube 12 to prevent a large amount of plastic burrs from remaining on the surface of the PI tube 12 after cutting. If it is not polished, a large amount of plastic burrs will affect the sealing of the later pipe fittings after connection. When the PI tube 12 is cut into a butt joint, the first cutting knife 20 turned into a right angle is fitted with the surface of the PI tube 12, and the second cutting knife 21 is used to cut the PI tube 12 to form two pipe fittings, and then the first cutting knife 20 is used to fit the surfaces of the two pipe fittings to cut the butt joint. In the process of cutting the PI tube 12 by the second cutting knife 21, the grinding sheets 31 on both sides of the second cutting knife 21 are used to grind the cutting port, and the dust generated by grinding is extracted and collected by the dust suction port 22, thereby improving the practicality of the cutting device; When the PI tube 12 is cut, the PI tube is transported into the PI tube limiting assembly 2, and the PI tube limiting assembly 2 clamps and limits the PI tube 12. When the PI tube 12 needs to be cut, the crank 410 is driven to rotate, and the bidirectional threaded rod 403 is driven to rotate. At the same time, the bidirectional threaded rod 403 threadedly drives the two second sliders 404 to move closer to each other. When the two second sliders 404 move closer to each other, the first semicircular clamping roller b405 is driven to move synchronously. At the same time, the first semicircular clamping roller b405 drives the second semicircular clamping roller b405 to move synchronously. 8 move closer to each other, so that the first semicircular clamping roller b405 cooperates with the second semicircular clamping roller b408 to clamp and fix the PI tube 12, and the first semicircular clamping roller b405 and the second semicircular clamping roller b408 are both provided with a plurality of rubber anti-slip strips 409 on the outside, so that the rubber anti-slip strips 409 can be used to clamp and fix the PI tube 12 to prevent the first cutting knife 20 or the second cutting knife 21 from driving the PI tube 12 to cut in a ring shape around the PI tube 12, causing the first cutting knife 20 or the second cutting knife 21 to drive the PI tube 12 to rotate, thereby affecting the cutting efficiency of the PI tube 12.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A PI tube cutting device for an extruder, characterized in that: The invention comprises a base plate (1), the upper end surface of the base plate (1) is fixedly connected to an annular bracket (8), the inner cavity of the annular bracket (8) is rotatably connected to a support bracket (5), both ends of the support bracket (5) are fixedly connected to a gear ring (10), the upper end of the support bracket (5) is rotatably connected to a threaded sleeve (18), the inner cavity of the threaded sleeve (18) is rotatably connected to a screw rod barrel (17), the lower end of the screw rod barrel (17) is fixedly connected to a U-shaped fixing frame (19), the lower end of the U-shaped fixing frame (19) is fixedly connected to a second cutting knife (21), and a plurality of PI pipe limiter assemblies (2) are mounted on the upper end surface of the base plate (1); The PI tube limiting assembly (2) comprises a plurality of first T-shaped brackets (201) fixedly connected to the upper end surface of the bottom plate (1), the upper ends of the plurality of first T-shaped brackets (201) are each provided with a first slide groove (202), the inner cavity of the first slide groove (202) is slidably connected to two first sliders (204), the upper ends of the two first sliders (204) are each rotatably connected to a first semicircular clamping roller a (206), and the upper ends of the first semicircular clamping roller a (206) are internally rotatably connected to a second semicircular clamping roller a (209).

2. The PI tube cutting device for an extruder according to claim 1, characterized in that: Two fixed slide posts (203) are fixedly connected to the inner cavity of the first slide groove (202), and each first slider (204) is slidably connected to each fixed slide post (203); a spring (205) is fixedly connected to one side of the first slider (204), and one end of the spring (205) is fixedly connected to the inner wall of the first slide groove (202); a first receiving groove (207) is provided at the upper end of the first semicircular clamping roller a (206); a first tension spring (208) is fixedly connected to the bottom of the inner cavity of the first receiving groove (207), and one end of the first tension spring (208) is fixedly connected to the second semicircular clamping roller a (209).

3. The PI tube cutting device for an extruder according to claim 1, characterized in that: The upper end of the screw rod tube (17) is fixedly connected to a vacuum cleaner (16), and the vacuum cleaner (16) is a handheld wireless vacuum cleaner. The dust discharge port of the vacuum cleaner (16) is fixedly connected to a dust extraction duct (15), and one end of the dust extraction duct (15) is fixedly connected to a collection tube (11), and the collection tube (11) is mounted on the support bracket (5).

4. The PI tube cutting device for an extruder according to claim 1, characterized in that: Two fixing frames (6) are symmetrically mounted on the upper end surface of the bottom plate (1), and a servo motor (7) is mounted between the two fixing frames (6). A toothed disc (9) is fixedly connected to the output shaft end of the servo motor (7), and the toothed disc (9) is meshingly connected to a gear ring (10). A collecting groove (3) is provided at the upper end of the bottom plate (1), and a recovery box is mounted at the lower end of the collecting groove (3).

5. The PI tube cutting device for an extruder according to claim 1, characterized in that: The upper end surface of the bottom plate (1) is mounted with a PI tube clamping assembly (4), and the PI tube clamping assembly (4) comprises a second T-shaped bracket (401) mounted on the upper end surface of the bottom plate (1), a second slide groove (402) is provided at the upper end of the second T-shaped bracket (401), two second sliders (404) are slidably connected to the inner cavity of the second slide groove (402), and the upper ends of the two second sliders (404) are rotatably connected to the first semicircular clamping roller b (405), and the upper ends of the first semicircular clamping roller b (405) are rotatably connected to the second semicircular clamping roller b (408), and the first semicircular clamping roller b (405) and the second semicircular clamping roller b (408) are evenly arranged on the outside with a plurality of rubber anti-slip strips (409).

6. The PI tube cutting device for an extruder according to claim 5, characterized in that: A second receiving groove (406) is formed at the upper end of the first semicircular clamping roller b (405); a second tension spring (407) is fixedly connected to the bottom of the inner cavity of the second receiving groove (406); one end of the second tension spring (407) is fixedly connected to the second semicircular clamping roller b (408); and the first semicircular clamping roller b (405) and the second semicircular clamping roller b (408) are used to clamp the PI tube (12).

7. The PI tube cutting device for an extruder according to claim 5, characterized in that: A bidirectional threaded rod (403) is rotatably connected to the inner cavity of the second slide groove (402), and two second sliding blocks (404) are threadedly connected to the bidirectional threaded rod (403). One end of the bidirectional threaded rod (403) passes through the second T-shaped bracket (401) and is fixedly connected to a crank (410). The upper ends of the second T-shaped bracket (401) and the first T-shaped bracket (201) are both provided with a groove (13), and the inner cavity of the groove (13) is rotatably connected to a rubber roller (14).

8. The PI tube cutting device for an extruder according to claim 1, characterized in that: Two first cutting knives (20) are rotatably connected to the inner cavity of the U-shaped fixing frame (19), and one end of the two first cutting knives (20) passes through the U-shaped fixing frame (19) and is fixedly connected to a first bevel gear (23). Two supporting blocks (25) are symmetrically fixedly connected to one end of the U-shaped fixing frame (19), and the two supporting blocks (25) are rotatably connected to the inside of the second rotating shaft (30), and both ends of the second rotating shaft (30) are fixedly connected to a second bevel gear (24), and the second bevel gear (24) is meshingly connected to the first bevel gear (23).

9. A PI tube cutting device for an extruder according to claim 8, characterized in that: Two support blocks (25) are symmetrically fixedly connected to one end of the U-shaped fixing frame (19), and the two support blocks (25) are internally rotatably connected to a first rotating shaft (27), and three third bevel gears (26) are externally fixedly connected to the first rotating shaft (27), and the third bevel gears (26) located at both ends of the first rotating shaft (27) are meshingly connected to the second bevel gear (24), and a driving motor (28) is arranged inside one end of the U-shaped fixing frame (19), and the output shaft of the driving motor (28) is fixedly connected to a transmission bevel gear (29), and the transmission bevel gear (29) is meshingly connected to the third bevel gears (26).

10. The PI tube cutting device for an extruder according to claim 1, characterized in that: Grinding sheets (31) are provided on both sides of the U-shaped fixing frame (19), and grinding sheets (31) are also provided on both sides of the second cutting knife (21), and a plurality of dust suction ports (22) are evenly provided on both sides of the second cutting knife (21), and the dust suction ports (22) are connected to the inner cavity of the second cutting knife (21), and the inner cavity of the second cutting knife (21) is connected to the inner cavity of the screw rod barrel (17).

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