Screw extrusion equipment for recycling thermoplastic polyester processing chemical fiber material

Abstract

The invention relates to the related technical field of plastic waste recovery processing, in particular to screw extrusion equipment for recovering thermoplastic polyester processing chemical fiber materials, which comprises a screw extruder, the screw extruder comprises an operation table and an extrusion cylinder fixedly mounted on the operation table, a shaping plate is detachably mounted at an extrusion end formed by the extrusion cylinder, at least two groups of through holes are formed in the shaping plate, and an opening and closing mechanism is arranged between the shaping plate and the extrusion end; the cooling pipe is arranged on the operation table, and a moving space is formed at the front end of the cooling pipe; the cleaning mechanisms are symmetrically arranged in the moving space and are controlled by a reciprocating pushing piece mounted in the moving space; according to the device disclosed by the invention, the problems of adhesion and solidification of thermoplastic polyester which are extremely easy to generate under a shock cooling condition are effectively reduced on the premise of ensuring continuous production of the screw extruder through cooperative cooperation of intermittent switch switching and the cleaning mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of plastic waste recycling and processing, specifically a screw extrusion device for recycling thermoplastic polyester and processing it into chemical fiber materials. Background Technology

[0002] Thermoplastic polyester raw materials are a class of polymeric materials that can be repeatedly shaped by heating, with polyethylene terephthalate (PET) being the most common. These materials are widely used in packaging, textiles, and electronic component housings. Due to the short lifespan of plastic products, improper disposal of large quantities of waste can lead to resource waste and environmental pressure. Recycling has become one way to alleviate this problem.

[0003] The recycling process mainly involves sorting, cleaning, crushing, melting, and regranulating waste thermoplastic polyester into raw materials that can be reused in production. This material is commonly referred to as recycled polyester fiber. Specifically, the cleaned fragments are melted, extruded into sheets using a screw extruder, and finally drawn into fibers through a spinning process.

[0004] Existing screw extruders can convey, compact, and extrude hot-melt polyester melt, which is then forced through a granulation die at the front of the barrel. Because the die diameter is fixed, the melt is forced out, and the extruded wire is extremely hot, requiring immediate cooling. Therefore, water or air cooling is typically used to solidify the melt. However, a sudden temperature drop during extrusion can cause a sharp increase in viscosity, resulting in residue on the die wall and hindering subsequent melt extrusion. Summary of the Invention

[0005] The purpose of this invention is to provide a screw extrusion device for recycling thermoplastic polyester processed into chemical fiber materials, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A screw extrusion device for recycling thermoplastic polyester processed into chemical fiber materials includes a screw extruder. The screw extruder includes an operating table and an extrusion cylinder fixedly installed on the operating table. An extrusion conveyor is provided inside the extrusion cylinder. A shaping plate is detachably installed on the extrusion end formed by the extrusion cylinder. At least two sets of through holes are formed on the shaping plate. An opening and closing mechanism matching the through holes is provided between the shaping plate and the extrusion end to facilitate switching between opening and closing the two through holes. It also includes a cooling pipe disposed on the operating table, the cooling pipe being connected to the extrusion end, and an movable space being formed between the front end of the cooling pipe and the shaping plate; A cleaning mechanism, symmetrically arranged within the active space, is used to scrape the surface of the through hole and is controlled by a reciprocating pusher installed within the active space. An intermittent drive unit is installed on the operating table and is connected to the extrusion conveyor, the opening and closing mechanism, and the cleaning mechanism, respectively.

[0007] The screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials as described above: the extrusion conveyor includes an auger rotatably installed inside the extrusion cylinder, one end of the auger shaft extends out of the extrusion cylinder, a motor is fixedly installed on the extrusion cylinder, and the output shaft of the motor is fixed to the auger shaft.

[0008] The screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials as described above: the opening and closing mechanism includes at least one ball valve rotatably mounted on the extrusion end, the ball valve having a guide hole formed thereon, the guide hole being able to align with the through hole, and a connecting shaft that can pass through the extrusion end being fixedly mounted on the ball valve.

[0009] The screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials as described above: the reciprocating pusher includes a grooved roller rotatably installed in the active space, a groove is formed on the grooved roller, a collar is slidably sleeved along the axial direction of the grooved roller, and extrusion balls that are movably arranged on the inner wall of the collar and adapted to slide with the groove. The reciprocating pusher further includes a connecting plate, which is fixedly installed on the shaping plate. The two ends of the connecting plate are symmetrically formed with strip grooves. A lifting rod is slidably arranged in the strip grooves. The end of the lifting rod away from the connecting plate can be fixedly sleeved on the collar.

[0010] The screw extrusion equipment for recycling thermoplastic polyester processed chemical fiber materials as described above: the cleaning mechanism includes at least one set of receiving seats fixedly installed on the lifting rod, and a scraper with an inclined structure is rotatably installed on the receiving seat. The end of the scraper away from the receiving seat can scrape the through hole. The cleaning mechanism further includes: an elastic pressing element, disposed on the receiving seat and connected to the scraper, used to adjust the scraping force when the scraper moves back and forth.

[0011] The screw extrusion equipment for recycling thermoplastic polyester processed chemical fiber materials as described above: the elastic extrusion component includes a plug sleeve fixedly installed on the receiving seat, a plug rod is slidably disposed inside one end of the plug sleeve, the plug rod can extend out of the plug sleeve and be hinged to the scraper, and a pressure plate is slidably disposed inside the other end, the movement of the pressure plate is driven by a push assembly disposed on the receiving seat; The elastic compression member further includes a spring, which is disposed inside the insertion sleeve, and the two ends of the spring abut against the pressure plate and the insertion rod, respectively.

[0012] The screw extrusion equipment for recycling thermoplastic polyester processed chemical fiber materials as described above: the pushing component includes a threaded rod rotatably mounted on the receiving seat, one end of the threaded rod extending into the insertion sleeve and threadedly connected to the threaded sleeve on the pressure plate, and the other end being driven by a speed regulating shaft rotatably mounted on the receiving seat through a transmission gear set; The pushing component further includes: a movable shaft, which is rotatably mounted on the receiving seat. The movable shaft is connected to the speed regulating shaft via a driven bevel gear set. A ratchet is fixedly sleeved at the end of the movable shaft. A ratchet plate with unidirectional transmission with the ratchet is symmetrically arranged at both ends of the connecting plate.

[0013] The screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials as described above: the intermittent drive component includes a lead screw rotatably mounted on the operating table, the lead screw being connected to the auger shaft via a drive gear set, and a push plate being threaded onto the lead screw; The intermittent drive component further includes: an opening and closing control shaft, a cleaning transmission shaft, an opening and closing motion shaft, and a cleaning drive shaft arranged parallel to each other and rotatably mounted on the operating table. The end of the push plate away from the lead screw is slidably connected to the opening and closing control shaft, the cleaning transmission shaft, the opening and closing motion shaft, and the cleaning drive shaft, respectively.

[0014] The screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials as described above: the cleaning drive shaft and the cleaning drive shaft are respectively connected to the two grooved rollers through a set of active bevel gears; The opening and closing control shaft and the opening and closing motion shaft are respectively connected to the connecting shaft through two sets of intermediate transmission components.

[0015] The screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials as described above: the transfer transmission component includes a transfer shaft rotatably mounted on the operating table, with transfer bevel gear sets respectively provided at both ends of the transfer shaft, and one end of each of the two transfer shafts being connected to the two connecting shafts through the transfer bevel gear sets, the other end of one of the transfer shafts being connected to the opening and closing control shaft through the transfer bevel gear set, and the other end of the other transfer shaft being connected to the opening and closing motion shaft through the transfer bevel gear set.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The hot-melted chemical fiber material is conveyed to the extrusion end inside the extrusion cylinder. Through the cooperation of the opening and closing mechanism and the shaping plate, the material is shaped into a specific shape. After shaping, the material is extruded from one set of through holes and enters the cooling pipe for cooling. At this time, the other set of through holes is in a blocked state. Driven by the intermittent drive component, after one of the opening and closing mechanisms is opened for a period of time, the opening and closing and blocking of the two opening and closing mechanisms can be automatically switched. When the other opening and closing mechanism is opened, the opening and closing mechanism that was originally open is closed. The reciprocating push component controls the cleaning mechanism to move up and down relative to the surface of the through hole. When the cleaning mechanism moves downward, it can scrape off the residual material that has solidified or adhered to the edge of the through hole due to cooling, avoiding the accumulation of residue into lumps. This ensures the smooth flow of material in the cooling pipe and the molding quality. Through the intermittent switching and the coordination of the cleaning mechanism, it is ensured that one set of through holes is always in the working state and the other set is in the cleaning preparation state. This effectively reduces the adhesion and solidification problems that thermoplastic polyester is prone to under rapid cooling conditions, realizes continuous production of screw extruder, and further improves production efficiency. When the scraper descends under the pressure of the elastic extrusion component, the scraper and the shaping plate are in contact and simultaneously generate extrusion force, which effectively removes residual material that has solidified or adhered to the edge of the through hole due to cooling. When the scraper returns to its original position, the extrusion force of the elastic extrusion component on the scraper decreases, preventing the scraper from pushing the residual material adhering to the edge back. This effectively reduces the mechanical friction between the scraper and the shaping plate. During the return stroke when cleaning is not required, the scraper does not consume additional energy to overcome excessive resistance. Attached Figure Description

[0017] Figure 1 A schematic diagram of a screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials.

[0018] Figure 2 A schematic diagram of the extrusion cylinder and cooling pipe in a screw extrusion equipment for recycling thermoplastic polyester processed chemical fiber materials.

[0019] Figure 3 A schematic diagram of the extrusion cylinder and auger in a screw extrusion unit for recycling thermoplastic polyester processed into chemical fiber materials.

[0020] Figure 4 A schematic diagram of the extrusion end and opening / closing mechanism in a screw extrusion device for recycling thermoplastic polyester processed into chemical fiber materials.

[0021] Figure 5 A schematic diagram of the forming plate in a screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials.

[0022] Figure 6 A schematic diagram of the reciprocating pusher in a screw extrusion device for recycling thermoplastic polyester processed chemical fiber materials.

[0023] Figure 7 A schematic diagram of the cleaning mechanism and lifting rod in a screw extrusion equipment for recycling thermoplastic polyester processed chemical fiber materials.

[0024] Figure 8 A schematic diagram of the cleaning mechanism in a screw extrusion unit for recycling thermoplastic polyester processed chemical fiber materials.

[0025] Figure 9 A schematic diagram of the scraper and elastic extruder in a screw extrusion device for recycling thermoplastic polyester processed into chemical fiber materials.

[0026] Figure 10 A schematic diagram of the structure of the elastic extruder in a screw extrusion equipment for recycling thermoplastic polyester processed into chemical fiber materials.

[0027] Figure 11 A schematic diagram of the intermittent drive and auger in a screw extrusion unit for recycling thermoplastic polyester processed into chemical fiber materials.

[0028] Figure 12 A schematic diagram of the intermittent drive component in a screw extrusion unit for recycling thermoplastic polyester processed into chemical fiber materials.

[0029] In the diagram: 1. Operating table; 2. Protective cover; 3. Extrusion cylinder; 301. Extrusion end; 302. Baffle; 4. Cooling pipe; 5. Shaping plate; 501. Through hole; 6. Screw; 7. Motor; 8. Ball valve; 9. Connecting shaft; 10. Transfer shaft; 11. Transfer bevel gear set; 12. Receiving chute; 13. Connecting plate; 1301. Strip groove; 14. Ratchet plate; 15. Grooving roller; 1501. Slide groove; 16. Collar; 1601. Extrusion ball; 17. Lifting rod; 8. Receiver; 19. Scraper; 20. Insert rod; 21. Insert sleeve; 22. Speed ​​regulating shaft; 23. Transmission gear set; 24. Threaded rod; 25. Spring; 26. Pressure plate; 2601. Threaded sleeve; 27. Movable shaft; 28. Driven bevel gear set; 29. ​​Racket; 30. Lead screw; 31. Drive gear set; 32. Push plate; 33. Opening and closing control shaft; 34. Cleaning transmission shaft; 35. Opening and closing motion shaft; 36. Cleaning drive shaft; 37. Active bevel gear set. Detailed Implementation

[0030] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0031] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0032] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0033] Please see Figures 1-12 In this embodiment of the invention, a screw extrusion device for recycling thermoplastic polyester processed into chemical fiber materials includes a screw extruder. The screw extruder includes an operating table 1 and an extrusion cylinder 3 fixedly installed on the operating table 1. An extrusion conveyor is provided inside the extrusion cylinder 3. A shaping plate 5 is detachably installed on the extrusion end 301 formed by the extrusion cylinder 3. At least two sets of through holes 501 are formed on the shaping plate 5. An opening and closing mechanism matching the through holes 501 is provided between the shaping plate 5 and the extrusion end 301 to facilitate the switching of the two through holes 501 being open or blocked. It also includes a cooling pipe 4 disposed on the operating table 1, the cooling pipe 4 being connected to the extrusion end 301, and an active space being formed between the front end of the cooling pipe 4 and the shaping plate 5; A cleaning mechanism, symmetrically arranged within the active space, is used to scrape the surface of the through hole 501 and is controlled by a reciprocating pusher installed within the active space. An intermittent drive unit is installed on the operating table 1 and is connected to the extrusion conveyor, the opening and closing mechanism, and the cleaning mechanism, respectively.

[0034] In this embodiment, the hot-melted chemical fiber material is conveyed to the extrusion end 301 inside the extrusion cylinder 3. Through the cooperation of the opening and closing mechanism and the shaping plate 5, the material is formed into a specific shape. After shaping, the material is extruded from one set of through holes 501 and enters the cooling pipe 4 for cooling. At this time, the other set of through holes 501 is in a blocked state. After continuous extrusion for a period of time, under the drive of the intermittent drive component, one of the opening and closing mechanisms is opened for a period of time. The opening and closing and blocking of the two opening and closing mechanisms can be automatically switched. When the other opening and closing mechanism is opened, the opening and closing mechanism that was originally open is closed, and the reciprocating push is initiated. The cleaning mechanism controls the reciprocating movement of the cleaning mechanism relative to the surface of the through hole 501. When the cleaning mechanism moves downward, it can scrape off the residual material that has solidified or adhered to the edge of the through hole 501 due to cooling, preventing the residue from accumulating into clumps. This ensures the smooth flow of material in the cooling pipe 4 and the molding quality. Through intermittent switching and coordination with the cleaning mechanism, it ensures that one set of through holes 501 is always in working condition and the other set is in cleaning preparation condition. This effectively reduces the adhesion and solidification problems that thermoplastic polyester is prone to under rapid cooling conditions, realizes continuous production of the screw extruder, and further improves production efficiency.

[0035] In one embodiment, the extrusion conveyor includes an auger 6 rotatably mounted inside the extrusion cylinder 3. One end of the auger 6's rotating shaft extends out of the extrusion cylinder 3. A motor 7 is fixedly mounted on the extrusion cylinder 3. The output shaft of the motor 7 is fixed to the rotating shaft of the auger 6. The auger 6's material conveying is prior art, and the present invention will not provide further explanation here.

[0036] As a further embodiment of the present invention, please refer to... Figure 4 The opening and closing mechanism includes at least one ball valve 8 rotatably mounted on the extrusion end 301. The ball valve 8 has a guide hole formed on it, and the guide hole can be aligned with the through hole 501. A connecting shaft 9 that can pass through the extrusion end 301 is fixedly mounted on the ball valve 8.

[0037] Among them, a baffle 302 is provided on the extrusion end 301, and an opening and closing mechanism is provided between the baffle 302 and the shaping plate 5 to assist in material forming.

[0038] In this embodiment, when the auger 6 rotates, the guide holes on one set of ball valves 8 are aligned with the through holes 501, so that the material in the extrusion cylinder 3 can be smoothly squeezed out of the through holes 501 through the ball valves 8, while the guide holes on the other set of ball valves 8 are separated from the through holes 501, ensuring that one set of through holes 501 is always in the working state and the other set is in the cleaning preparation state.

[0039] As a further embodiment of the present invention, please refer to... Figure 6 The reciprocating pusher includes a grooved roller 15 rotatably mounted in the active space. A groove 1501 is formed on the grooved roller 15. A collar 16 is slidably sleeved along the axial direction of the grooved roller 15. A pressing ball 1601 that is movably matched with the groove 1501 is movably disposed on the inner wall of the collar 16. The reciprocating pusher also includes a connecting plate 13, which is fixedly installed on the shaping plate 5. The two ends of the connecting plate 13 are symmetrically formed with strip grooves 1301. A lifting rod 17 is slidably arranged in the strip grooves 1301. The end of the lifting rod 17 away from the connecting plate 13 can be fixedly sleeved on the collar 16.

[0040] In this embodiment, when the grooved roller 15 rotates under the drive of the intermittent drive component, the groove 1501 on it generates an inclined force on the extrusion ball 1601. At this time, under the limiting cooperation of the lifting rod 17 and the strip groove 1301, the collar 16 moves along the axial direction of the grooved roller 15, and the grooved roller 15 rotates one revolution each time, so that the cleaning mechanism can scrape the surface of the through hole 501 and reset it, which is convenient for the next cleaning work.

[0041] As a further embodiment of the present invention, please refer to... Figure 7 , Figure 8, Figure 9 and Figure 10 The cleaning mechanism includes at least one set of receiving seats 18 fixedly installed on the lifting rod 17. A scraper 19 with an inclined structure is rotatably installed on the receiving seat 18. The end of the scraper 19 away from the receiving seat 18 can scrape the through hole 501. The cleaning mechanism further includes: an elastic pressing element, which is disposed on the receiving seat 18 and connected to the scraper 19, for adjusting the scraping force when the scraper 19 reciprocates.

[0042] The elastic extrusion member includes a plug sleeve 21 fixedly installed on the receiving seat 18. A plug rod 20 is slidably disposed inside one end of the plug sleeve 21. The plug rod 20 can extend out of the plug sleeve 21 and be hinged to the scraper 19. A pressure plate 26 is slidably disposed inside the other end. The movement of the pressure plate 26 is driven by a push assembly disposed on the receiving seat 18. The elastic compression member further includes a spring 25, which is disposed inside the insertion sleeve 21, and the two ends of the spring 25 abut against the pressure plate 26 and the insertion rod 20, respectively.

[0043] The pushing component includes a threaded rod 24 rotatably mounted on the receiving seat 18. One end of the threaded rod 24 extends into the insertion sleeve 21 and is threadedly connected to the threaded sleeve 2601 on the pressure plate 26. The other end is connected to the speed regulating shaft 22 rotatably mounted on the receiving seat 18 via a transmission gear set 23. The pushing component further includes: a movable shaft 27, which is rotatably mounted on the receiving seat 18. The movable shaft 27 is connected to the speed regulating shaft 22 via a driven bevel gear set 28. A ratchet 29 is fixedly sleeved at the end of the movable shaft 27. A ratchet plate 14 with unidirectional transmission with the ratchet 29 is symmetrically arranged at both ends of the connecting plate 13.

[0044] Preferably, a protective cover 2 is fixedly installed on the operating table 1, the extrusion cylinder 3 and the cooling pipe 4 are covered inside the protective cover 2, and a material collection trough 12 is provided inside the protective cover 2 to collect the material removed by the scraper 19.

[0045] Specifically, the ratchet 29 has multiple teeth evenly distributed along its circumference, while the ratchet plate 14 has multiple grooves formed along its length. A ratchet rack is rotatably installed in the groove, and a torsion spring is provided between the ratchet rack and the inner wall of the groove. When the ratchet 29 moves back and forth relative to the ratchet plate 14, it can only achieve effective engagement in one direction.

[0046] In the initial state, the scraper 19 is at the highest point of its stroke, and there is a certain gap between the scraper 19 and the through hole 501 to prevent the scraper 19 from hindering the extrusion and discharge of materials when it is not scraping.

[0047] When the grooved roller 15 rotates, it drives the lifting rod 17 to perform reciprocating lifting and lowering actions. When the lifting rod 17 descends, it is squeezed by the elastic extruder, and the scraper 19 adheres to the shaping plate 5 while generating extrusion force, so that the residual material on the edge of the through hole 501 that has solidified or adhered due to cooling is effectively scraped off. When the lifting rod 17 returns to its original position, the extrusion force of the elastic extruder on the scraper 19 decreases, reducing the mechanical friction between the scraper 19 and the shaping plate 5. During the return stroke when cleaning is not required, the scraper 19 will not consume additional energy to overcome excessive resistance.

[0048] Initially, spring 25 is compressed, ensuring that scraper 19 exerts pressure on shaping plate 5 as it descends, effectively scraping away residual material that has solidified or adhered to the edge of through hole 501 due to cooling. After scraper 19 descends and separates from the edge of through hole 501, as scraper 19 continues to move downwards, ratchet 29 effectively engages with ratchet plate 14, causing movable shaft 27 to rotate. Under the speed-increasing transmission of driven bevel gear set 28 and transmission gear set 23, threaded rod 24 rotates, increasing the number of rotations of threaded rod 24. The rotation of 4 causes the threaded sleeve 2601 to move linearly along the axis of the threaded rod 24. At the same time, the threaded sleeve 2601 moves and drives the pressure plate 26 to move synchronously, so that the elastic compression potential energy of the spring 25 is released, ensuring that the friction between the scraper 19 and the shaping plate 5 is reduced when the scraper 19 is reset. When the scraper 19 rises to near the forming end, the ratchet 29 engages effectively with the ratchet plate 14 again, so that when the scraper 19 reaches the highest point of its stroke, the scraper 19 restores the scraping force on the shaping plate 5, which facilitates the subsequent cleaning of the edge of the through hole 501.

[0049] As a further embodiment of the present invention, please refer to... Figure 11 and Figure 12 The intermittent drive component includes a lead screw 30 rotatably mounted on the operating table 1. The lead screw 30 is connected to the shaft of the auger 6 via a drive gear set 31, and a push plate 32 is threaded onto the lead screw 30. The intermittent drive component further includes: an opening and closing control shaft 33, a cleaning transmission shaft 34, an opening and closing motion shaft 35, and a cleaning drive shaft 36, which are arranged parallel to each other and rotatably mounted on the operating table 1. The end of the push plate 32 away from the lead screw 30 is slidably connected to the opening and closing control shaft 33, the cleaning transmission shaft 34, the opening and closing motion shaft 35, and the cleaning drive shaft 36, respectively.

[0050] The cleaning transmission shaft 34 and the cleaning drive shaft 36 are respectively connected to the two grooved rollers 15 via the active bevel gear set 37. The opening and closing control shaft 33 and the opening and closing motion shaft 35 are respectively connected to the connecting shaft 9 through two sets of intermediate transmission components.

[0051] The transfer transmission component includes a transfer shaft 10 rotatably mounted on the operating table 1. A transfer bevel gear set 11 is provided at both ends of the transfer shaft 10. One end of each of the two transfer shafts 10 is connected to the two connecting shafts 9 through the transfer bevel gear set 11. The other end of one transfer shaft 10 is connected to the opening and closing control shaft 33 through the transfer bevel gear set 11, and the other end of the other transfer shaft 10 is connected to the opening and closing motion shaft 35 through the transfer bevel gear set 11.

[0052] It should be noted that: the opening and closing control shaft 33, the cleaning transmission shaft 34, the opening and closing motion shaft 35, and the cleaning drive shaft 36 are each formed with a limit groove, and the push plate 32 is fixedly connected with multiple sleeves, which are respectively sleeved on the opening and closing control shaft 33, the cleaning transmission shaft 34, the opening and closing motion shaft 35, and the cleaning drive shaft 36. Each of the multiple sleeves is provided with a movable ball that slides and adapts to the limit groove. Through the cooperation between the movable ball and the limit groove, the opening and closing control shaft 33, the cleaning transmission shaft 34, the opening and closing motion shaft 35, and the cleaning drive shaft 36 are intermittently rotated, realizing the switching of the two ball valves 8 and the coordinated cooperation of the two sets of scrapers 19 to perform cleaning work, ensuring that one set of through holes 501 is always in the working state and the other set is in the cleaning preparation state.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A screw extrusion device for recycling thermoplastic polyester processing chemical materials, comprising a screw extruder, the screw extruder comprising an operation table (1) and an extrusion barrel (3) fixedly installed on the operation table (1), and an extrusion conveying part arranged in the extrusion barrel (3), characterized in that, The extrusion end (301) formed by the extrusion cylinder (3) is detachably provided with a shaping plate (5), at least two groups of through holes (501) are formed on the shaping plate (5), and an opening and closing mechanism matched with the through holes (501) is arranged between the shaping plate (5) and the extrusion end (301), so as to facilitate the switching of the two through holes (501) in the open or closed state. Further comprising a cooling pipe (4) arranged on the operation table (1), the cooling pipe (4) is communicated with the extrusion end (301), and an activity space is formed between the front end of the cooling pipe (4) and the shaping plate (5). A cleaning mechanism is symmetrically arranged in the activity space and is used for scraping the surface of the through hole (501), and is controlled by a reciprocating pushing member arranged in the activity space. An intermittent driving member is arranged on the operation table (1) and is connected with the extrusion conveying member, the opening and closing mechanism and the cleaning mechanism.

2. The screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 1, characterized in that, The extrusion conveying member comprises an auger (6) rotatably arranged in the extrusion cylinder (3), one end of the rotating shaft of the auger (6) extends out of the extrusion cylinder (3), a motor (7) is fixedly arranged on the extrusion cylinder (3), and the output shaft of the motor (7) is fixed with the rotating shaft of the auger (6).

3. The screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 2, characterized in that, The opening and closing mechanism comprises at least one ball valve (8) rotatably arranged on the extrusion end (301), a guide hole is formed on the ball valve (8), the guide hole can be aligned with the through hole (501), and a connecting shaft (9) capable of penetrating the extrusion end (301) is fixedly arranged on the ball valve (8).

4. The screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 3, characterized in that, The reciprocating pushing member comprises a groove roller (15) rotatably arranged in the activity space, a sliding groove (1501) is formed on the groove roller (15), a sleeve ring (16) is slidably arranged on the groove roller (15) in the axial direction, and extrusion balls (1601) are movably arranged on the inner wall of the sleeve ring (16) and are slidably matched with the sliding groove (1501). The reciprocating pushing member further comprises a connecting plate (13) fixedly arranged on the shaping plate (5), strip-shaped grooves (1301) are symmetrically formed at both ends of the connecting plate (13), a lifting rod (17) is slidably arranged in the strip-shaped groove (1301), and one end of the lifting rod (17) away from the connecting plate (13) can be fixedly arranged on the sleeve ring (16).

5. The screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 4, wherein The cleaning mechanism comprises at least one set of receiving seats (18) fixedly arranged on the lifting rod (17), scraper plates (19) arranged in an inclined structure are rotatably arranged on the receiving seats (18), and one end of the scraper plates (19) away from the receiving seats (18) can scrape the through holes (501); The cleaning mechanism further comprises an elastic extrusion member arranged on the receiving seat (18) and connected with the scraper plate (19), which is used for adjusting the scraping force when the scraper plate (19) reciprocates.

6. A screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 5, wherein The elastic extruding piece comprises a plug sleeve (21) fixedly installed on the receiving seat (18), one end of the plug sleeve (21) is slidably provided with a plug rod (20), the plug rod (20) can be extended out of the plug sleeve (21) and hinged with the scraper (19), and the other end is slidably provided with a pressing plate (26), movement of the pressing plate (26) is driven by a pushing assembly provided on the receiving seat (18); The elastic extruding piece further comprises a spring (25) provided in the plug sleeve (21), and the two ends of the spring (25) are respectively abutted with the pressing plate (26) and the plug rod (20).

7. A screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 6, wherein The pushing assembly comprises a threaded rod (24) rotatably installed on the receiving seat (18), one end of the threaded rod (24) is extended into the plug sleeve (21) and is threadedly connected with a threaded sleeve (2601) on the pressing plate (26), and the other end is drivingly connected with a speed regulating shaft (22) rotatably installed on the receiving seat (18) through a transmission gear set (23); The pushing assembly further comprises a movable shaft (27) rotatably installed on the receiving seat (18), the movable shaft (27) is drivingly connected with the speed regulating shaft (22) through a driven bevel gear set (28), and a ratchet (29) is fixedly sleeved on the end of the movable shaft (27), and the connecting plate (13) is symmetrically provided with a ratchet plate (14) drivingly connected with the ratchet (29) at two ends.

8. The screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 4, wherein The intermittent driving piece comprises a lead screw (30) rotatably installed on the operation table (1), the lead screw (30) is drivingly connected with a rotating shaft of the auger (6) through a driving gear set (31), and a push plate (32) is threadedly connected on the lead screw (30); The intermittent driving piece further comprises an opening and closing control shaft (33), a cleaning transmission shaft (34), an opening and closing movement shaft (35) and a cleaning driving shaft (36) which are parallel to each other and rotatably installed on the operation table (1), and one end of the push plate (32) away from the lead screw (30) is slidably connected with the opening and closing control shaft (33), the cleaning transmission shaft (34), the opening and closing movement shaft (35) and the cleaning driving shaft (36) respectively.

9. A screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 8, characterized by, The cleaning transmission shaft (34) and the cleaning driving shaft (36) are drivingly connected with the two groove rollers (15) through a driving bevel gear set (37) respectively; The opening and closing control shaft (33) and the opening and closing movement shaft (35) are drivingly connected with the connecting shaft (9) through two groups of intermediate transmission members respectively.

10. The screw extrusion apparatus for recycling thermoplastic polyester process chemical materials according to claim 9, wherein The intermediate transmission comprises an intermediate shaft (10) rotatably mounted on the operating table (1), both ends of the intermediate shaft (10) are respectively provided with an intermediate bevel gear set (11), and one end of each of the two intermediate shafts (10) is in transmission connection with the two connecting shafts (9) through the intermediate bevel gear set (11), one end of one of the intermediate shafts (10) is connected with the opening and closing control shaft (33) through the intermediate bevel gear set (11), and the other end of the other intermediate shaft (10) is in transmission connection with the opening and closing movement shaft (35) through the intermediate bevel gear set (11).

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