PI pipe fixed-length shearing device for plastic extruding machine

Abstract

The invention belongs to the technical field of shearing devices, and particularly relates to a PI pipe fixed-length shearing device for a plastic extruding machine, which comprises a base, a material guide frame is mounted on one side of the upper end surface of the base, two limiting plates are symmetrically and fixedly connected to two sides of the upper end of the material guide frame, and a first fixing frame is fixedly connected to one side of the upper end surface of the base. An annular supporting frame is fixedly connected to the upper end of the first fixing frame, a PI conveying pipe is placed in an inner cavity of the annular supporting frame, a gear ring is rotationally connected into one side of the annular supporting frame, and a shearing adjusting assembly is installed at one end of the gear ring. The problems that generally, a cutting knife annularly rotates around a plastic pipe, then the plastic pipe is sheared off after the cutting knife rotates by a circle, however, when the plastic pipe with the large diameter is sheared, the diameter of the cutting knife annularly rotates around the plastic pipe, and the plastic pipe is sheared off are solved. And therefore, the shearing efficiency of the plastic pipe is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of shearing devices, in particular to a PI pipe fixed-length shearing device for an extruder. Background Art

[0002] PI tube is a tubular product made of polyimide fiber as the main material. PI tube is usually produced by extrusion using an extruder. After extrusion, the PI tube is cooled by cooling equipment to make it quickly formed, and then the PI tube is cut into the length required by the customer. Usually, when customers order, they need a batch of PI tubes of the same length. Therefore, a fixed-length cutting device is needed to cut the PI tubes, and then they are collected and packaged for delivery.

[0003] At present, when traditional fixed-length shearing devices cut plastic pipes, the plastic pipes are fixed on the clamping mechanism, the clamping mechanism is driven to rotate, and then the cutting knife is controlled to approach the plastic pipe to cut it. When cutting PI pipes produced by extruders, since the PI pipes cannot rotate, the cutting knife is driven to rotate around the PI pipe in a circular shape, and the center point of the circular rotation of the cutting knife must be on the same line as the center point of the PI pipe. Then, the PI pipe is cut off after the cutting knife rotates one circle.

[0004] The above-mentioned prior art still has some problems in actual use. When cutting a plastic pipe, a cutting knife is usually used to fit the surface of the plastic pipe, and then the cutting knife is driven to rotate in a circular shape around the plastic pipe. After the cutting knife rotates one circle, the plastic pipe is cut off. However, since a single cutting knife is used to rotate in a circular shape to cut the plastic pipe, if a plastic pipe with a larger diameter is cut, the diameter of the plastic pipe will become larger when the cutting knife rotates in a circular shape around the plastic pipe, which will lead to a problem of low cutting efficiency of the plastic pipe.

[0005] To this end, the present invention provides a PI tube fixed-length shearing device for 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 fixed-length shearing device for an extruder described in the present invention comprises a base, a material guide frame is installed on one side of the upper end surface of the base, two limit plates are symmetrically fixedly connected to the upper ends of the material guide frame, a first fixed frame is fixedly connected to one side of the upper end surface of the base, an annular support frame is fixedly connected to the upper end of the first fixed frame, a conveying PI tube is placed in the inner cavity of the annular support frame, a gear ring is rotatably connected in one side of the annular support frame, and a shearing adjustment component is installed at one end of the gear ring; The shear adjustment assembly includes a mounting frame mounted on one end of the gear ring, one end of the mounting frame is fixedly connected to a support plate, one end of the support plate is internally rotatably connected to a threaded barrel, the threaded barrel is internally threadedly connected to a screw rod, and one end surface of the support plate is provided with a receiving groove; The inner cavity of the storage groove is slidably connected with a mounting knife seat, one end of the screw rod is fixedly connected to the mounting knife seat, and a cutting knife is slidably mounted inside the mounting knife seat.

[0008] Preferably, a driven gear is fixedly connected to the outside of the threaded cylinder, a micro motor is arranged inside one end of the support plate, the output shaft end of the micro motor passes through the support plate and is fixedly connected to a transmission gear, and the transmission gear is meshedly connected to the driven gear.

[0009] Preferably, two support tubes are symmetrically fixed on both sides of the lower end of the mounting knife seat, and buffer springs are fixed to the bottom of the inner cavity of the two support tubes, one end of the buffer spring is fixed to a T-shaped slider, one end of the T-shaped slider is fixed to a cleaning plate, and a grinding sheet is provided on the lower end surface of the cleaning plate.

[0010] Preferably, a through groove is provided on the upper end of the cleaning plate, and the cutting knife is slidably connected to the through groove, four limiting grooves are symmetrically provided on the inner wall of the through groove, and the four limiting grooves are symmetrically arranged in pairs, a grinding block is slidably connected to the inner cavity of the through groove, limiting columns are fixedly connected to both ends of the grinding block, and the limiting columns are slidably connected to the limiting grooves.

[0011] Preferably, the inner cavities at both ends of the cleaning plate are equipped with abutments, and one end of the abutment is fixedly connected to a micro spring, one end of the micro spring is fixedly connected to a first T-shaped slide column, and one end of the first T-shaped slide column is fixedly connected to the abutment.

[0012] Preferably, a fixed cylinder is installed at one end of the annular support frame, a second spring is fixedly connected to the bottom of the inner cavity of the fixed cylinder, a T-shaped slide bar is fixedly connected to one end of the second spring, a pushing frame is fixedly connected to one end of the T-shaped slide bar, two second T-shaped slide columns are slidably connected at both ends of the pushing frame, and a semicircular pressing roller is fixedly connected between the two second T-shaped slide columns, and an extrusion tension spring is fixedly connected to both ends of the pushing frame, and one end of the extrusion tension spring is fixedly connected to the second T-shaped slide column.

[0013] Preferably, a hydraulic push rod is installed at one end of the annular support frame, and the piston rod end of the hydraulic push rod is fixedly connected to a bracket, the inner cavity of the bracket is fixedly connected to a fixed column, and two semicircular rollers are slidably connected to the outside of the fixed column, and the two semicircular rollers are plugged into each other, and one end of the two semicircular rollers is fixedly connected to a first spring, and one end of the first spring is fixedly connected to the bracket.

[0014] Preferably, a transmission groove is provided on the upper end surface of the base, a servo motor is installed inside the upper end of the base, and a gear plate is fixedly connected to one end of the servo motor output shaft located in the inner cavity of the transmission groove, and the gear plate is meshingly connected with a gear ring.

[0015] Preferably, a pipe clamping and limiting assembly is fixedly connected to the upper end surface of the base, and the pipe clamping and limiting assembly includes two second fixing frames fixedly connected to the upper end surface of the base, and the inner cavities of the two second fixing frames are fixedly connected to support slide columns, the outside of the support slide column is symmetrically slidably connected to two sliders, and a clamping roller is fixedly connected between the two sliders, a plurality of rubber rings are evenly arranged on the outside of the clamping roller, and tension springs are fixedly connected between the sliders, and one end of the tension spring is fixedly connected to the second fixing frame.

[0016] Preferably, a storage rack is slidably connected to one side of the material guide rack, an electric push rod is installed on the upper end of the storage rack, and a support plate is fixedly connected to the piston rod end of the electric push rod, the support plate slides in the inner cavity of the material guide rack, and a handle is fixedly connected to one side of the storage rack.

[0017] The beneficial effects of the present invention are as follows: 1. The PI tube fixed-length shearing device for an extruder described in the present invention, in the process of driving the cutting knife to approach the PI tube, the cleaning plate is fitted with the surface of the PI tube, and then as the cutting knife continues to approach the PI tube, the cutting knife is inserted between the two grinding blocks and fits with the surface of the PI tube, and at the same time, the installed knife seat is driven to rotate around the PI tube in a ring shape, and the PI tube is sheared by the cutting knife. During the shearing process of the cutting knife, the cleaning plate is driven to rotate synchronously, and a grinding sheet is provided on the lower end surface of the cleaning plate, so that the incision cut by the PI tube can be polished during the synchronous rotation of the cleaning plate and the cutting knife, so as to prevent the incision of the PI tube from generating a large number of plastic burrs due to shearing, affecting the quality of the finished product, and avoiding the trouble of separately polishing the incision of the PI tube in the later stage, thereby solving the problem that in the existing PI tube fixed-length shearing device for an extruder, if the incision of the plastic tube is not polished during the shearing process of the plastic tube, a large number of plastic burrs will be generated on the incision of the plastic tube due to shearing, which not only affects the quality of the finished product, but also affects the sealing problem of the later installation of the plastic tube.

[0018] 2. The PI tube fixed-length shearing device for an extruder described in the present invention, when the cutting knife completes the resetting of the PI tube after shearing, the micro-spring uses the rebound force to bounce up the first T-shaped sliding column, and pushes the grinding block to fit the surface of the cutting knife. Then, during the resetting process of the cutting knife, the grinding block is used to grind the blade surface and the blade edge of the cutting knife, thereby improving the sharpness of the cutting knife, so that the cutting knife can better and quickly shear the PI tube. At the same time, the cleaning plate can also store and protect the cutting knife by the through groove to prevent the cutting knife from causing safety hazards to the operator, thereby solving the problem of the existing PI tube fixed-length shearing device for an extruder. Since the cutting knife shears the plastic tube for a long time, the blade surface and the blade edge of the cutting knife will be scratched and other damages. If the cutting knife is not polished or replaced, the cutting efficiency of the cutting knife on the plastic tube will be affected. At the same time, the plastic tube sheared by the damaged blade edge or the blade surface will cause the incision of the plastic tube to be uneven, which needs to be polished later, thereby reducing the shearing quality problem of the shearing device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a schematic diagram of the structure of the main view of the present invention as a whole; Figure 2 It is a schematic diagram of the structure of the rear-view stereogram of the present invention; Figure 3 It is a schematic diagram of the installation structure of the push frame of the present invention; Figure 4 This is a half-section schematic diagram of the internal structure of the material guide rack of the present invention; Figure 5 It is a schematic diagram of the overall structure of the shear adjustment component of the present invention; Figure 6 2. It is a bottom view structural diagram of the shear adjustment assembly of the present invention; Figure 7 It is a schematic diagram of the internal structure of the half-section of the knife holder installed in the present invention; Figure 8 This is a schematic diagram of the internal structure of a half-section of a cleaning plate of the present invention; Fig. 9 It is a schematic diagram of the installation structure of the shear adjustment component of the present invention; In the figure: 1. base; 2. material guide frame; 3. limit plate; 4. first fixed frame; 5. annular support frame; 6. gear ring; 7. shear adjustment assembly; 71. mounting frame; 72. threaded cylinder; 73. support plate; 74. driven gear; 75. transmission gear; 76. micro motor; 77. storage slot; 78. screw rod; 8. Fixed cylinder; 9. Pipe clamping and limiting assembly; 91. second fixed frame; 92. slide block; 93. clamping roller; 94. supporting slide column; 95. tension spring; 10. PI tube; 11. Support plate; 12. Storage rack; 13. Handle; 14. Transmission groove; 15. Install knife seat; 16. Support cylinder; 17. Cutting knife; 18. Cleaning plate; 19. Limit slide groove; 20. Limit column; 21. Grinding block; 22. Through groove; 23. First T-type slide column; 24. Micro spring; 25. Block; 26. Hydraulic push rod; 27. Bracket; 28. Semicircular roller; 29. ​​First spring; 30. Fixed column; 31. Push frame; 32. Second T-type slide column; 33. Semicircular pressing roller; 34. Extrusion tension spring; 35. T-type slide bar; 36. Second spring; 37. Toothed disc; 38. Servo motor; 39. Electric push rod; 40. Buffer spring; 41. T-type slider. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example:

[0023] like Figures 1 to 9 As shown, a PI tube fixed-length shearing device for an extruder according to an embodiment of the present invention comprises a base 1, a material guide frame 2 is installed on one side of the upper end surface of the base 1, two limit plates 3 are symmetrically fixedly connected to the upper ends of the material guide frame 2, a first fixed frame 4 is fixedly connected to one side of the upper end surface of the base 1, an annular support frame 5 is fixedly connected to the upper end of the first fixed frame 4, a conveying PI tube 10 is placed in the inner cavity of the annular support frame 5, a gear ring 6 is rotatably connected to one side of the annular support frame 5, and a shearing adjustment component 7 is installed at one end of the gear ring 6; The shear adjustment assembly 7 includes a mounting frame 71 mounted on one end of the gear ring 6, a support plate 73 is fixedly connected to one end of the mounting frame 71, a threaded cylinder 72 is rotatably connected to one end of the support plate 73, a screw rod 78 is threadedly connected to the threaded cylinder 72, and a receiving groove 77 is provided on one end surface of the support plate 73; The inner cavity of the storage groove 77 is slidably connected to the mounting knife seat 15, one end of the screw rod 78 is fixedly connected to the mounting knife seat 15, and a cutting knife 17 is slidably installed inside the mounting knife seat 15.

[0024] Specifically, in the prior art, when shearing a plastic pipe, a cutting knife is usually used to fit the surface of the plastic pipe, and then the cutting knife is driven to rotate in a circular shape around the plastic pipe, and then the plastic pipe is sheared after the cutting knife rotates one circle. However, since a single cutting knife is used to shear the plastic pipe in a circular shape, if a plastic pipe with a larger diameter is sheared, the diameter of the plastic pipe will become larger when the cutting knife rotates in a circular shape around the plastic pipe, which will lead to a problem of low shearing efficiency of the plastic pipe. According to the present invention, after the extruder extrude the PI tube 10 and cool it into shape through the cooling device, the PI tube 10 enters the inner cavity of the annular support frame 5 to move. After the extruder extrude the PI tube 10 to a certain length, the extruder stops running, and then drives the threaded barrel 72 to rotate, and makes the threaded transmission screw 78 of the threaded barrel 72 move toward the center of the inner cavity of the annular support frame 5. During the movement of the screw 78, the installation knife seat 15 is pushed to slide out of the storage groove 77 to move, and the installation knife seat 15 drives the cutting knife 17 to move synchronously, so that the cutting knife 17 is fitted with the surface of the PI tube 10, and then the ring gear 6 is driven to rotate, and the ring gear 6 drives the installation frame 71 to rotate, and the installation frame 71 drives the support plate 73 to rotate synchronously, so that the support plate 73 can be The installed knife seat 15 is driven to rotate, and then the installed knife seat 15 drives the cutting knife 17 to shear the PI tube 10, and the sheared PI tube 10 falls onto the guide frame 2, and is guided by the guide frame 2 to be collected, thereby solving the problem that when the existing PI tube fixed-length shearing device for an extruder is used to shear the plastic tube, the cutting knife is usually fitted with the surface of the plastic tube, and then the cutting knife is driven to rotate in a circular shape around the plastic tube, and then the plastic tube is sheared after the cutting knife rotates one circle. However, since a single cutting knife is used to rotate in a circular shape to shear the plastic tube, if a plastic tube with a larger diameter is sheared, the diameter of the cutting knife rotating in a circular shape around the plastic tube will become larger, which will lead to a low shearing efficiency of the plastic tube.

[0025] like Figure 1 , Figure 5 and Figure 6 As shown, a driven gear 74 is fixedly connected to the outside of the threaded cylinder 72 , a micro motor 76 is arranged inside one end of the support plate 73 , the output shaft end of the micro motor 76 passes through the support plate 73 and is fixedly connected to a transmission gear 75 , and the transmission gear 75 is meshedly connected with the driven gear 74 .

[0026] Specifically, before shearing the PI tube 10, the transmission gear 75 is driven to rotate by starting the micro motor 76, and the transmission gear 75 is meshed with the transmission driven gear 74 to rotate, and the driven gear 74 drives the threaded cylinder 72 to rotate. During the rotation of the threaded cylinder 72, the threaded transmission screw rod 78 of the threaded cylinder 72 moves toward the center of the inner cavity of the annular support frame 5. During the movement of the screw rod 78, the installation knife seat 15 is pushed to slide out of the storage groove 77 to move. At the same time, the installation knife seat 15 drives the cutting knife 17 to move synchronously, so that the cutting knife 17 is fitted with the surface of the PI tube 10, and then the cutting knife 17 is driven to rotate in a ring shape around the PI tube 10, so that the PI tube 10 is sheared by the cutting knife 17, thereby solving the problem that during the use of the existing PI tube fixed-length shearing device for an extruder, if it is inconvenient to adjust the position of the cutting knife according to plastic tubes of different diameters, the shearing device cannot adapt to the shearing of plastic tubes of different diameters.

[0027] like Figure 5 , Figure 6 and Figure 7 As shown, two support tubes 16 are symmetrically fixed to the two sides of the lower end of the tool holder 15, and the bottom of the inner cavity of the two support tubes 16 is fixed with a buffer spring 40, one end of the buffer spring 40 is fixed with a T-shaped slider 41, one end of the T-shaped slider 41 is fixed with a cleaning plate 18, and the lower end surface of the cleaning plate 18 is provided with a grinding sheet.

[0028] like Figures 5 to 8 As shown, a through slot 22 is opened at the upper end of the cleaning plate 18, and the cutting knife 17 is slidably connected to the through slot 22, four limiting slide grooves 19 are symmetrically opened on the inner wall of the through slot 22, and the four limiting slide grooves 19 are symmetrically arranged in pairs, and a grinding block 21 is slidably connected to the inner cavity of the through slot 22, and limiting columns 20 are fixedly connected at both ends of the grinding block 21, and the limiting columns 20 are slidably connected to the limiting slide grooves 19.

[0029] Specifically, in the process of driving the cutting knife 17 to approach the PI tube 10, the cleaning plate 18 is fitted with the surface of the PI tube 10, and then as the cutting knife 17 continues to approach the PI tube 10, the cutting knife 17 is inserted into the inner cavity of the through groove 22, and at the same time inserted between the two grinding blocks 21, and the grinding block 21 is squeezed to slide into the inner cavity of the through groove 22, and then the grinding block 21 drives the limiting column 20 to slide into the inner cavity of the limiting slide groove 19, and then the cutting knife 17 is fitted with the surface of the PI tube 10, and when the driving installation knife seat 15 is rotated in a ring shape around the PI tube 10, the PI tube 10 is sheared by the cutting knife 17, and during the shearing process of the cutting knife 17, the cleaning plate 18 is driven to rotate synchronously, and the buffer spring 40 pops up the T-shaped slider 41, which can The T-shaped slider 41 is able to push the cleaning plate 18 to fit tightly with the PI tube 10, and a grinding sheet is provided on the lower end surface of the cleaning plate 18, so that the cut of the PI tube 10 can be polished during the synchronous rotation of the cleaning plate 18 with the cutting knife 17, so as to prevent a large number of plastic burrs from being generated at the cut of the PI tube 10 due to shearing, thereby affecting the quality of the finished product and avoiding the trouble of separately polishing the cut of the PI tube 10 in the later stage. Thus, the problem that if the cut of the plastic tube is not polished during the shearing process of the plastic tube by the existing PI tube fixed-length shearing device for the extruder, a large number of plastic burrs will be generated at the cut of the plastic tube due to shearing will not only affect the quality of the finished product, but also affect the sealing problem of the later installation of the plastic tube.

[0030] like Figures 7 and 8 As shown, a stopper 25 is installed in the inner cavity at both ends of the cleaning plate 18, and one end of the stopper 25 is fixedly connected to a micro spring 24, one end of the micro spring 24 is fixedly connected to a first T-shaped slide column 23, and one end of the first T-shaped slide column 23 is fixedly connected to the stopper 25.

[0031] Specifically, when the cutting knife 17 is inserted between the two grinding blocks 21, the grinding block 21 slides into the inner cavity of the through groove 22 and pushes the first T-shaped slide column 23 to squeeze the micro spring 24. Then, when the cutting knife 17 shears the PI tube 10 and completes the reset, the micro spring 24 uses the rebound force to bounce the first T-shaped slide column 23, and the first T-shaped slide column 23 pushes the grinding block 21 to fit the surface of the cutting knife 17. Then, during the reset process of the cutting knife 17, the grinding block 21 is used to grind the blade surface and the blade edge of the cutting knife 17, thereby improving the sharpness of the cutting knife 17, so that the cutting knife 17 can better and quickly cut the PI tube 10. The I tube 10 is sheared, and the cleaning plate 18 can also use the through groove 22 to store and protect the cutting knife 17 to prevent the cutting knife 17 from causing safety hazards to the operator, thereby solving the problem that the existing PI tube fixed-length shearing device for an extruder causes scratches and other damages on the blade surface and the blade edge of the cutting knife due to the cutting work of the cutting knife on the plastic tube for a long time. If the cutting knife is not polished or replaced, the cutting efficiency of the cutting knife on the plastic tube will be affected. At the same time, the plastic tube cut out by the damaged blade edge or blade surface will cause the cut of the plastic tube to be uneven, which needs to be polished later, thereby reducing the shearing quality problem of the shearing device.

[0032] Example:

[0033] like Figures 2 to 4 As shown, another embodiment of the present invention is: a fixed cylinder 8 is installed at one end of the annular support frame 5, a second spring 36 is fixedly connected to the bottom of the inner cavity of the fixed cylinder 8, a T-shaped slide bar 35 is fixedly connected to one end of the second spring 36, and a pushing frame 31 is fixedly connected to one end of the T-shaped slide bar 35. Two second T-shaped slide columns 32 are slidably connected to the two ends of the pushing frame 31, and a semicircular pressing roller 33 is fixedly connected between the two second T-shaped slide columns 32. Extrusion tension springs 34 are fixedly connected to both ends of the pushing frame 31, and one end of the extrusion tension spring 34 is fixedly connected to the second T-shaped slide column 32.

[0034] like Figures 2 to 4 As shown, a hydraulic push rod 26 is installed at one end of the annular support frame 5, and the piston rod end of the hydraulic push rod 26 is fixedly connected to a bracket 27, a fixed column 30 is fixedly connected to the inner cavity of the bracket 27, and two semicircular rollers 28 are slidably connected to the outside of the fixed column 30, and the two semicircular rollers 28 are plugged into each other, one end of the two semicircular rollers 28 is fixedly connected to a first spring 29, and one end of the first spring 29 is fixedly connected to the bracket 27.

[0035] Specifically, after the PI tube 10 is extruded by the extruder and cooled and formed by the cooling equipment, the PI tube 10 enters the inner cavity of the annular support frame 5, and then the hydraulic push rod 26 is started to drive the bracket 27 to move upward, and the bracket 27 drives the fixed column 30 to move upward, and at the same time, the fixed column 30 drives the two semicircular rollers 28 to move synchronously, and then the two semicircular rollers 28 are used to hold up the PI tube 10 in the inner cavity of the annular support frame 5, so that the center of the PI tube 10 and the center of the annular support frame 5 are kept at the same level, and one end of the two semicircular rollers 28 is provided with a first spring 29, and then the two semicircular rollers 28 can be bounced by the rebound force of the first spring 29 to move close to each other, so that the two semicircular rollers 28 clamp and limit the PI tube 10, and in the process of the bracket 27 holding up the PI tube 10 and moving it upward, the upper end of the PI tube 10 fits with the semicircular pressing roller 33, and at the same time, the PI tube 10 pushes The semicircular pressing roller 33 moves upward, and the semicircular pressing roller 33 drives the second T-shaped sliding column 32 to move synchronously, thereby causing the second T-shaped sliding column 32 to drive the pushing frame 31 to move upward, and at the same time, the pushing frame 31 pushes the T-shaped sliding rod 35 to slide into the inner cavity of the fixed cylinder 8 and squeeze the second spring 36 in the inner cavity of the fixed cylinder 8, and then uses the rebound force of the second spring 36 to drive the semicircular pressing roller 33 to press and fix the PI tube 10, and at the same time uses the return force of the extrusion tension spring 34 to pull the second T-shaped sliding column to drive the semicircular pressing roller 33 to clamp and limit the PI tube 10, thereby avoiding the PI tube 10 from moving too offset when shearing the PI tube 10, affecting the cutting knife to rotate in a circular shape to shear it, resulting in the trouble that the PI tube 10 cannot be sheared on one side, and at the same time, it can also improve the practicability and convenience of the shearing device, so that it can clamp and limit plastic tubes of different diameters.

[0036] like Figure 3 , Figure 4 and Fig. 9 As shown, a transmission groove 14 is opened on the upper end surface of the base 1, and a servo motor 38 is installed inside the upper end of the base 1. The output shaft of the servo motor 38 is located in the inner cavity of the transmission groove 14 and is fixedly connected with a toothed disc 37, and the toothed disc 37 is meshed with the gear ring 6.

[0037] like Figure 1 and Figure 2 As shown, a pipe clamping and limiting assembly 9 is fixedly connected to the upper end surface of the base 1, and the pipe clamping and limiting assembly 9 includes two second fixed frames 91 fixedly connected to the upper end surface of the base 1, and the inner cavities of the two second fixed frames 91 are fixedly connected to support slide columns 94, the outside of the support slide column 94 is symmetrically slidably connected to two sliders 92, and a clamping roller 93 is fixedly connected between the two sliders 92, and a plurality of rubber rings are evenly arranged on the outside of the clamping roller 93, and tension springs 95 are fixedly connected between the sliders 92, and one end of the tension spring 95 is fixedly connected to the second fixed frame 91.

[0038] like Figure 1 and Figure 4As shown, a storage rack 12 is slidably connected to one side of the material guide rack 2, an electric push rod 39 is installed on the upper end of the storage rack 12, and a support plate 11 is fixedly connected to the piston rod end of the electric push rod 39. The support plate 11 slides in the inner cavity of the material guide rack 2, and a handle 13 is fixedly connected to one side of the storage rack 12.

[0039] Specifically, after the PI tube 10 formed by cooling by the cooling equipment is sent into the inner cavity of the annular support frame 5, the PI tube 10 will enter between the two clamping rollers 93, and a plurality of rubber rings are arranged outside the clamping rollers 93, so that the rubber rings can be used to limit the PI tube 10, and at the same time, the tension springs 95 are used to pull the sliders 92 to move closer to each other, so that the sliders 92 slide synchronously outside the support slide column 94, and at the same time drive the clamping rollers 93 to move closer to each other, so that the clamping rollers 93 clamp and fix the PI tube 10, and then After the cutting knife 17 cuts the PI tube 10, the subsequent PI tube 10 that enters will push the cut PI tube 10 to slide out of the inner cavity of the clamping roller 93 and fall into the inner cavity of the guide rack 2. At the same time, the guide rack 2 is used to guide the cut PI tube 10 for collection. If the length of the PI tube 10 that needs to be cut to a fixed length is too long, the electric push rod 39 is started to drive the support plate 11 to move upward, and then the support plate 11 can be used to lift the PI tube 10 to keep the PI tube 10 level, thereby improving the accuracy of the cutting length.

[0040] Working principle: after the PI tube 10 is extruded by the extruder and cooled and formed by the cooling equipment, it is sent into the inner cavity of the annular support frame 5, and the PI tube 10 will enter between the two clamping rollers 93, and a plurality of rubber rings are arranged outside the clamping rollers 93, so that the rubber rings can be used to limit the PI tube 10, and at the same time, the sliders 92 are pulled closer to each other by the tension springs 95, so that the sliders 92 slide synchronously outside the support slide column 94, and at the same time drive the clamping rollers 93 to move closer to each other, so that the clamping rollers 93 clamp the PI tube 10. Then, after the cutting knife 17 cuts off the PI tube 10, the PI tube 10 that enters later will push the cut PI tube 10 to slide out of the inner cavity of the clamping roller 93 and fall into the inner cavity of the guide rack 2. At the same time, the guide rack 2 is used to guide the cut PI tube 10 for collection. If the length of the PI tube 10 that needs to be cut to a fixed length is too long, the electric push rod 39 is started to drive the support plate 11 to move upward, and then the support plate 11 can be used to lift the PI tube 10, so that the PI tube 10 remains horizontal, thereby improving the accuracy of the cutting length; Before cutting the PI tube 10, the transmission gear 75 is driven to rotate by starting the micro motor 76, and the transmission gear 75 is meshed with the driven gear 74 to rotate, and the driven gear 74 drives the threaded cylinder 72 to rotate. During the rotation of the threaded cylinder 72, the threaded transmission screw 78 of the threaded cylinder 72 moves toward the center of the inner cavity of the annular support frame 5. During the movement of the screw 78, the installation knife seat 15 is pushed to slide out of the storage groove 77 and move. At the same time, the installation knife seat 15 drives the cutting knife 17 to move synchronously, so that the cutting knife 17 is fitted with the surface of the PI tube 10. In the process of driving the cutting knife 17 to approach the PI tube 10, the cleaning plate 18 is in contact with the surface of the PI tube 10, and then as the cutting knife 17 continues to approach the PI tube 10, the cutting knife 17 is inserted into the inner cavity of the through groove 22, and at the same time inserted between the two grinding blocks 21, and the grinding blocks 21 are squeezed to slide into the inner cavity of the through groove 22, and then the grinding blocks 21 drive the limiting column 20 to slide into the inner cavity of the limiting slide groove 19, and then the cutting knife 17 is in contact with the surface of the PI tube 10, and when the driving installation knife seat 15 is rotated in a ring shape around the PI tube 10, the PI tube 10 is cut by the cutting knife 17. Shearing, and during the shearing process of the cutting knife 17, the cleaning plate 18 will be driven to rotate synchronously, and the buffer spring 40 will bounce up the T-shaped slider 41, so that the T-shaped slider 41 can push the cleaning plate 18 to fit closely with the PI tube 10, and the lower end surface of the cleaning plate 18 is provided with a grinding sheet, so that the incision of the PI tube 10 can be polished during the synchronous rotation of the cleaning plate 18 with the cutting knife 17, so as to prevent a large number of plastic burrs from being generated at the incision of the PI tube 10 due to shearing, which affects the quality of the finished product, and also avoids the trouble of separately polishing the incision of the PI tube 10 in the later stage; When the cutting knife 17 completes the resetting after shearing the PI tube 10, the micro spring 24 uses the rebound force to bounce up the first T-shaped slide column 23, and the first T-shaped slide column 23 pushes the grinding block 21 to fit the surface of the cutting knife 17. Then, during the resetting process of the cutting knife 17, the grinding block 21 is used to grind the blade surface and the blade edge of the cutting knife 17, thereby improving the sharpness of the cutting knife 17, so that the cutting knife 17 can better and quickly shear the PI tube 10. At the same time, the cleaning plate 18 can also store and protect the cutting knife 17 using the through groove 22 to prevent the cutting knife 17 from causing safety hazards to the operator.

[0041] 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 fixed length shearing device for an extruder, characterized in that: It comprises a base (1), a material guide frame (2) is installed on one side of the upper end surface of the base (1), two limit plates (3) are symmetrically fixedly connected to the upper ends of the material guide frame (2), a first fixing frame (4) is fixedly connected to one side of the upper end surface of the base (1), an annular support frame (5) is fixedly connected to the upper end of the first fixing frame (4), a conveying PI tube (10) is placed in the inner cavity of the annular support frame (5), a gear ring (6) is rotatably connected to one side of the annular support frame (5), and a shear adjustment component (7) is installed at one end of the gear ring (6); The shear adjustment assembly (7) comprises a mounting frame (71) mounted on one end of the gear ring (6), one end of the mounting frame (71) is fixedly connected to a support plate (73), one end of the support plate (73) is internally rotatably connected to a threaded cylinder (72), the threaded cylinder (72) is internally threadedly connected to a screw rod (78), and one end surface of the support plate (73) is provided with a receiving groove (77); The inner cavity of the storage groove (77) is slidably connected to a mounting knife seat (15), one end of the screw rod (78) is fixedly connected to the mounting knife seat (15), and a cutting knife (17) is slidably mounted inside the mounting knife seat (15).

2. The PI tube fixed-length shearing device for an extruder according to claim 1, characterized in that: The threaded cylinder (72) is fixedly connected to a driven gear (74) on the outside, a micro motor (76) is provided inside one end of the support plate (73), an output shaft end of the micro motor (76) passes through the support plate (73) and is fixedly connected to a transmission gear (75), and the transmission gear (75) is meshingly connected to the driven gear (74).

3. The PI tube fixed-length shearing device for an extruder according to claim 1, characterized in that: Two support tubes (16) are symmetrically fixedly connected to the lower ends of the mounting tool seat (15), and the bottoms of the inner cavities of the two support tubes (16) are fixedly connected to buffer springs (40), one end of the buffer spring (40) is fixedly connected to a T-shaped slider (41), one end of the T-shaped slider (41) is fixedly connected to a cleaning plate (18), and a grinding sheet is provided on the lower end surface of the cleaning plate (18).

4. The PI tube fixed-length shearing device for an extruder according to claim 3, characterized in that: A through slot (22) is formed at the upper end of the cleaning plate (18), and the cutting blade (17) is slidably connected to the through slot (22). Four limiting slide grooves (19) are symmetrically formed on the inner wall of the through slot (22), and the four limiting slide grooves (19) are symmetrically arranged in pairs. A grinding block (21) is slidably connected to the inner cavity of the through slot (22), and limiting columns (20) are fixedly connected at both ends of the grinding block (21), and the limiting columns (20) are slidably connected to the limiting slide grooves (19).

5. The PI tube fixed-length shearing device for an extruder according to claim 4, characterized in that: Abutment blocks (25) are installed in the inner cavities at both ends of the cleaning plate (18), and one end of the abutment block (25) is fixedly connected to a micro spring (24), one end of the micro spring (24) is fixedly connected to a first T-shaped sliding column (23), and one end of the first T-shaped sliding column (23) is fixedly connected to the abutment block (25).

6. The PI tube fixed-length shearing device for an extruder according to claim 1, characterized in that: A fixing cylinder (8) is installed at one end of the annular support frame (5), a second spring (36) is fixedly connected to the bottom of the inner cavity of the fixing cylinder (8), one end of the second spring (36) is fixedly connected to a T-shaped slide bar (35), one end of the T-shaped slide bar (35) is fixedly connected to a push frame (31), two second T-shaped slide columns (32) are slidably connected to the two ends of the push frame (31), and a semicircular pressing roller (33) is fixedly connected between the two second T-shaped slide columns (32), and an extrusion tension spring (34) is fixedly connected to the two ends of the push frame (31), and one end of the extrusion tension spring (34) is fixedly connected to the second T-shaped slide column (32).

7. The PI tube fixed-length shearing device for an extruder according to claim 6, characterized in that: A hydraulic push rod (26) is installed at one end of the annular support frame (5), and the piston rod end of the hydraulic push rod (26) is fixedly connected to a bracket (27), the inner cavity of the bracket (27) is fixedly connected to a fixing column (30), the outside of the fixing column (30) is slidably connected to two semicircular rollers (28), and the two semicircular rollers (28) are plugged into each other, and one end of the two semicircular rollers (28) is fixedly connected to a first spring (29), and one end of the first spring (29) is fixedly connected to the bracket (27).

8. The PI tube fixed-length shearing device for an extruder according to claim 1, characterized in that: The upper end surface of the base (1) is provided with a transmission groove (14), and a servo motor (38) is installed inside the upper end of the base (1). The output shaft of the servo motor (38) is located in the inner cavity of the transmission groove (14), and a toothed disc (37) is fixedly connected to one end, and the toothed disc (37) is meshingly connected with the gear ring (6).

9. The PI tube fixed-length shearing device for an extruder according to claim 1, characterized in that: The upper end surface of the base (1) is fixedly connected to a pipe clamping and limiting assembly (9), the pipe clamping and limiting assembly (9) comprising two second fixing frames (91) fixedly connected to the upper end surface of the base (1), and the inner cavities of the two second fixing frames (91) are both fixedly connected to support slide columns (94), the support slide columns (94) are symmetrically slidably connected to two sliders (92) outside, and a clamping roller (93) is fixedly connected between the two sliders (92), and a plurality of rubber rings are evenly arranged outside the clamping roller (93), and tension springs (95) are fixedly connected between the sliders (92), and one end of the tension spring (95) is fixedly connected to the second fixing frame (91).

10. The PI tube fixed-length shearing device for an extruder according to claim 1, characterized in that: A storage rack (12) is slidably connected to one side of the material guide rack (2); an electric push rod (39) is mounted on the upper end of the storage rack (12); a support plate (11) is fixedly connected to the piston rod end of the electric push rod (39); the support plate (11) slides in the inner cavity of the material guide rack (2); and a handle (13) is fixedly connected to one side of the storage rack (12).

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