Discharging device for extruder

Abstract

A discharging device for an extruder belongs to the field of screw extruder equipment for plastic particle processing and comprises a discharging seat and a discharging cleaning mechanism arranged in the discharging seat, the discharging cleaning mechanism comprises a cleaning push rod and a cleaning head assembly, a material channel is formed in the discharging seat, the cleaning head assembly is arranged on the inner side of the material channel, and the cleaning push rod is connected with the cleaning head assembly. The cleaning push rod is arranged at one end of the cleaning head assembly, a feeding pipe is arranged on the discharging base, the cleaning head assembly comprises a cleaning head and a cleaning tool bit, the top of the cleaning head is connected with the cleaning push rod, the cleaning head is matched with the inner wall of the material channel, and the cleaning tool bit is arranged at the edge of the bottom of the cleaning head. The material channel is formed in the discharging seat, the slidable cleaning head is arranged in the material channel and pushed to move through the cleaning push rod, and in the moving process of the cleaning head, the cleaning tool bit on the edge of the bottom of the cleaning head is matched with the inner wall of the material channel for scraping and sweeping, so that plastic residues attached to the interior of the material channel are effectively scraped, and the inner wall of the discharging seat is effectively cleaned; and residues are reduced.

Description

Technical Field

[0001] This invention relates to the technical field of screw extruder equipment for processing plastic granules, and more particularly to a discharge device for an extruder. Background Technology

[0002] Plastic screw extruders play a crucial role in plastic processing by performing melting, plasticizing, and extrusion. However, the problem of cleaning residual plastic inside the discharge head during shutdown maintenance has long plagued the industry. Due to the lack of a continuous heat source in the discharge head and die head area, high-viscosity melts (such as engineering plastics like PC and PA) solidify within 5-15 minutes after shutdown, adhering tightly to the inner wall of the flow channel and the screw end, forming a hardened layer that is difficult to peel off.

[0003] Traditional cleaning methods rely on manual disassembly of the die head, followed by mechanical scraping after localized heating with an oxyacetylene flame to soften the residue. This process has several drawbacks: First, the residue remaining on the inner wall of the discharge head after heating is still difficult to remove. Second, the residue is easily mixed into the new molten material after restarting heating, causing further blockage. Moreover, the introduction of impurities into the new material after restarting the equipment leads to crystal points and flow lines on the product surface, resulting in a decrease in yield. In addition, frequent disassembly and assembly accelerates wear on the threaded mating surfaces, causing loss of die head positioning accuracy and increased thickness deviation of the extruded product. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this invention is to provide a discharge device for an extruder that effectively cleans the inner wall of the discharge seat and reduces residue.

[0006] To achieve the above objectives, the present invention proposes a discharge device for an extruder, comprising a discharge seat and a discharge cleaning mechanism disposed in the discharge seat. The discharge cleaning mechanism includes a cleaning push rod and a cleaning head assembly. The discharge seat has a material channel inside, the cleaning head assembly is disposed inside the material channel, the cleaning push rod is disposed at one end of the cleaning head assembly, and a feeding pipe is disposed on the discharge seat, the feeding pipe communicating with the material channel. The cleaning head assembly includes a cleaning head and a cleaning cutter head. The top of the cleaning head is connected to the cleaning push rod, the cleaning head is adapted to the inner wall of the material channel, and the cleaning cutter head is disposed at the bottom edge of the cleaning head.

[0007] Furthermore, a buffer valve plate is slidably provided on the inner side of the cleaning head, a telescopic cover of elastic material is provided between the buffer valve plate and the cleaning head, a spring is provided on the top of the buffer valve plate, and a guide slide rod is provided on the buffer valve plate.

[0008] Furthermore, the cleaning cutter head has a serrated structure, and the discharge seat is provided with a rotary drive assembly for driving the cleaning cutter head to rotate, including a rotating base, a driven gear, and a drive motor. The outer circumferential wall of the cleaning push rod is provided with strip teeth. The rotating base is fixedly mounted on the top of the discharge seat. A driven gear disk is rotatably mounted inside the rotating base. An inner gear disk penetrates through the center of the driven gear disk. The cleaning push rod penetrates through the inner gear disk, and the strip teeth are adapted to the inner gear disk. The drive motor is mounted on the rotating base, and a drive gear is mounted on the output shaft of the drive motor. The drive gear meshes with the outer gear disk on the outer circumferential surface of the driven gear.

[0009] Furthermore, the discharge seat is provided with a telescopic push rod, and the output shaft end of the telescopic push rod is provided with a bearing seat. The top of the cleaning push rod is connected to the bearing seat. A vertical vibrator is provided between the bearing seat and the cleaning push rod. A sealed bearing is provided between the vertical vibrator and the cleaning push rod. The discharge seat is also provided with a guide telescopic rod, and the top of the guide telescopic rod is connected to the bearing seat.

[0010] Furthermore, the support seat is also provided with an air blowing assembly, including an air blowing pump installed on the support seat. The cleaning push rod has a hollow groove inside. The air blowing pump is connected to the upper side of the sealed bearing through an air blowing pipe. The hollow groove is connected to the air blowing pipe through the sealed bearing. A one-way exhaust valve is provided through the buffer valve plate. The top of the guide slide rod is provided with a venting groove. The guide slide rod is slidably connected to the hollow groove.

[0011] Furthermore, the discharge seat is provided with an oil injection nozzle, which is connected to the material channel, and a sealing ring is provided on the outer wall of the cleaning head.

[0012] Furthermore, the discharge end of the material channel is provided with a discharge connector, and the discharge connector is provided with a discharge shape adjustment component, including a discharge panel and a discharge shape switching plate. The discharge panel is screwed to the discharge connector via a spiral connector. The discharge shape switching plate is disposed between the discharge connector and the discharge panel. The edge of the discharge shape switching plate is provided with a positioning groove. The discharge shape switching plate is provided with a discharge groove. The discharge panel is provided with multiple extrusion ports of various shapes and specifications.

[0013] Furthermore, the discharge seat is equipped with a thermal control mechanism, including a heating liner and a cooling pipe. The heating liner is located on the outside of the material channel, the cooling pipe is located on the outside of the heating liner, and a heat-insulating liner is also provided on the outside of the cooling pipe.

[0014] Furthermore, a feed limiting ring is provided at the feed end of the feed channel.

[0015] Beneficial effects: This invention sets up a material channel inside the discharge seat, and a sliding cleaning head is set in the material channel. The cleaning head is moved by a cleaning push rod. During the movement of the cleaning head, the cleaning blade at its bottom edge matches and scrapes the inner wall of the material channel, effectively removing the plastic residue attached to the material channel and effectively cleaning the inner wall of the discharge seat, reducing residue.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a discharge device for an extruder according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a discharge device for an extruder according to an embodiment of the present invention from another perspective; Figure 3 This is a partial front cross-sectional view of a discharge device for an extruder according to an embodiment of the present invention; Figure 4 This is a partial cross-sectional view of a cleaning head assembly in a discharge device for an extruder according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the driven toothed disc and the cleaning push rod in the cooperating state of the discharge device for an extruder according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the discharge panel in the discharge device for an extruder according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the discharge shape switching plate in the discharge device for an extruder according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the discharge device for an extruder in its installed state according to an embodiment of the present invention.

[0018] As shown in the figure: 1. Discharge seat; 11. Oil nozzle; 12. Feed limit ring; 13. Discharge connector; 14. Material channel; 2. Feed pipe; 21. Mounting flange; 3. Discharge shape adjustment assembly; 31. Spiral connector; 32. Discharge panel; 33. Discharge shape switching plate; 331. Discharge trough; 332. Positioning slot; 34. Extrusion port; 4. Discharge cleaning mechanism; 41. Telescopic push rod; 42. Support seat; 43. Cleaning push rod; 431. Sealed bearing; 432. Hollow groove; 433. Strip tooth; 44. Air blowing assembly; 441. Air pump; 442. Air blowing pipe; 45. Rotary drive. 451. Drive motor; 452. Driven gear disc; 453. Drive gear; 454. Rotating base; 455. Internal gear disc; 456. External gear disc; 46. Vertical vibrator; 47. Cleaning head assembly; 471. Guide slide bar; 472. Spring; 473. Ventilation groove; 474. Cleaning head; 475. Sealing ring; 476. Buffer valve plate; 477. Cleaning cutter head; 478. Telescopic cover; 479. One-way exhaust valve; 48. Guide telescopic rod; 5. Thermal control mechanism; 51. Insulating liner; 52. Cooling pipe; 53. Heating liner; 54. Thermal controller; 6. Extrusion screw. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The discharge device for an extruder according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0021] like Figures 1-3 As shown, the extruder discharge device provided in this embodiment of the invention includes a discharge seat 1 and a discharge cleaning mechanism 4 disposed in the discharge seat 1. The discharge cleaning mechanism 4 includes a cleaning push rod 43 and a cleaning head assembly 47. The discharge seat 1 has a material channel 14 inside, the cleaning head assembly 47 is disposed inside the material channel 14, the cleaning push rod 43 is disposed at one end of the cleaning head assembly 47, and a feeding pipe 2 is disposed on the discharge seat 1, which is connected to the material channel 14.

[0022] The cleaning head assembly 47 includes a cleaning head 474 and a cleaning cutter head 477. The top of the cleaning head 474 is connected to the cleaning push rod 43, the cleaning head 474 is adapted to the inner wall of the material channel 14, and the cleaning cutter head 477 is disposed at the bottom edge of the cleaning head 474.

[0023] Specifically, during the compounding and extrusion process of plastic granules, the feed end of the feed pipe 2 is first connected to the end of the barrel of the screw extruder, ensuring that the screw end enters the feed pipe 2. After being compounded by the screw, the plastic granules soften and then enter the feed channel 14. The molten plastic passes through the feed channel 14 and is then constrained by the discharge panel 32 at the end of the discharge seat 1 before being discharged, forming strips of plastic. After cooling and pelletizing, the plastic is ready for use.

[0024] After the screw extruder stops, the discharge panel 32 is removed, and the cleaning pusher 43 drives the cleaning head 474 to move in the material channel 14 to expel the excess material in the material channel 14. During the movement of the cleaning head 474, the cleaning blade 477 on its bottom edge is matched with the inner wall of the material channel 14 to effectively scrape off the cooled plastic residue attached to the surface of the material channel 14, effectively cleaning the inner wall of the discharge seat 1 and reducing residue.

[0025] In one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, a buffer valve plate 476 is slidably provided on the inner side of the cleaning head 474. An elastic telescopic cover 478 is provided between the buffer valve plate 476 and the cleaning head 474. A spring 472 is provided on the top of the buffer valve plate 476. A guide slide rod 471 is provided on the buffer valve plate 476.

[0026] Specifically, when the discharge speed is unstable, the extrusion pressure of the molten plastic in the material channel 14 becomes unstable, which can easily lead to uneven discharge size. This device sets a buffer valve plate 476 in the cleaning head 474. When the pressure of the molten plastic changes, it will squeeze the buffer valve plate 476 to move up and down. The buffer valve plate 476 buffers the change in the extrusion pressure of the molten plastic through the spring 472, so as to stabilize the pressure of the molten plastic in the material channel 14 and make the discharge size more uniform.

[0027] During the buffer valve plate 476's buffer movement, the telescopic cover 478 on its edge isolates the upper and lower sides of the buffer valve plate 476 during its movement, preventing molten plastic from entering the upper side of the buffer valve plate 476 and causing blockage to its movement.

[0028] In one embodiment of the present invention, such as Figure 3 and Figure 5As shown, the cleaning cutter head 477 has a serrated structure and is in close contact with the material channel 14. A rotary drive assembly 45 for driving the cleaning cutter head 477 is provided on the discharge seat 1. This assembly includes a rotating base 454, a driven gear, and a drive motor 451. The outer circumferential wall of the cleaning push rod 43 is provided with strip teeth 433. The rotating base 454 is fixedly mounted on the top of the discharge seat 1. A driven gear disk 452 is rotatably mounted inside the rotating base 454. An inner gear disk 455 penetrates the center of the driven gear disk 452, and the cleaning push rod 43 penetrates the inner gear disk 455. The strip teeth 433 and the inner gear disk 455 are mutually adapted. The drive motor 451 is mounted on the rotating base 454, and a drive gear 453 is mounted on the output shaft of the drive motor 451. The drive gear 453 meshes with the outer gear disk 456 on the outer circumferential surface of the driven gear.

[0029] Specifically, in order to clean the inner wall of the material channel 14 more thoroughly and reduce the moving resistance of the cleaning head 474, during the process of the cleaning blade 477 moving downward to scrape the inner wall of the material channel 14, the drive motor 451 drives the drive gear 453 to rotate. The drive gear 453 meshes with the outer gear 456 on the outer circumference of the driven gear 452, driving the driven gear 452 to rotate. The inner gear 455 on the inner side of the driven gear 452 meshes with the strip teeth 433 on the surface of the cleaning push rod 43, driving the cleaning push rod 43 to rotate. Therefore, during the process of the cleaning push rod 43 driving the cleaning head 474 and the cleaning blade 477 to scrape downward, the rotation of the cleaning push rod 43 drives the cleaning blade 477 to rotate. At this time, the serrated cleaning blade 477 rotates to clean, reducing the cleaning resistance of the cleaning blade 477 and making it easier to scrape the plastic residue on the inner wall of the material channel 14 clean.

[0030] In one embodiment of the present invention, such as Figures 1-3 As shown, a telescopic push rod 41 is provided on the discharge seat 1. A bearing seat 42 is provided at the end of the output shaft of the telescopic push rod 41. The top of the cleaning push rod 43 is connected to the bearing seat 42. A vertical vibrator 46 is provided between the bearing seat 42 and the cleaning push rod 43. A sealed bearing 431 is provided between the vertical vibrator 46 and the cleaning push rod 43. A guide telescopic rod 48 is also provided on the discharge seat 1. The top of the guide telescopic rod 48 is connected to the bearing seat 42.

[0031] Specifically, in order to drive the cleaning push rod 43 to move up and down, the telescopic push rod 41 drives the support seat 42 to move up and down, which in turn drives the cleaning push rod 43 at the bottom of the support seat 42 to move up and down. The cleaning push rod 43 is rotatably connected to the bottom of the support seat 42 through the sealed bearing 431, which does not affect the rotation of the cleaning push rod 43.

[0032] In addition, during the downward movement of the cleaning push rod 43, the vertical vibrator 46 at the top of the cleaning push rod 43 provides vertical vibration force, which provides vertical vibration force to the cleaning head 474 and the cleaning cutter head 477 during their movement, creating a knocking effect on the plastic residue on the inner wall of the material channel 14, so that the plastic residue is fully peeled off, and preventing the cleaning head 474 from getting stuck.

[0033] In one embodiment of the present invention, such as Figures 1-4 As shown, the support base 42 is also equipped with an air blowing assembly 44, including an air blowing pump 441 mounted on the support base 42. The cleaning push rod 43 has a hollow groove 432 inside. The air blowing pump 441 is connected to the upper side of the sealed bearing 431 via an air blowing pipe 442, and the hollow groove 432 is connected to the air blowing pipe 442 via the sealed bearing 431. A one-way exhaust valve 479 is installed through the buffer valve plate 476, and a venting groove 473 is provided at the top of the guide slide rod 471. The guide slide rod 471 is slidably connected to the hollow groove 432.

[0034] Specifically, when used after shutdown, the air pump 441 generates airflow, which enters the hollow groove 432 inside the cleaning push rod 43 through the air pipe 442, then enters the buffer valve plate 476 above the venting slide 473, and finally exits downward through the one-way exhaust valve 479. The air pressure squeezes the molten plastic to fully empty the molten plastic in the material channel 14.

[0035] In addition, during the cleaning process of the cleaning head 474 cleaning the inner wall of the material channel 14, the airflow can be used to blow the residue cleaned from the material channel 14 downwards.

[0036] In one embodiment of the present invention, such as Figures 1-4 As shown, an oil injection nozzle 11 is provided on the discharge seat 1, and the oil injection nozzle 11 is connected to the material channel 14. A sealing ring 475 is provided on the outer wall of the cleaning head 474.

[0037] Specifically, before cleaning with the cleaning head 474, lubricating oil or softener can be injected into the inner wall of the material channel 14 through the grease nipple 11 to reduce the adhesion of plastic residue in the material channel 14 and improve the peeling efficiency of the residue. The sealing ring 475 set on the outer wall of the cleaning head 474 prevents residue from seeping into the side wall of the cleaning head 474, and plays a role in fully scraping the plastic residue.

[0038] In one embodiment of the present invention, such as Figure 2 , Figure 6 and Figure 7As shown, the discharge end of the material channel 14 is provided with a discharge connector 13, and the discharge connector 13 is provided with a discharge shape adjustment component 3, including a discharge panel 32 and a discharge shape switching plate 33. The discharge panel 32 is screwed to the discharge connector 13 via a spiral connector 31, and the discharge shape switching plate 33 is disposed between the discharge connector 13 and the discharge panel 32. The edge of the discharge shape switching plate 33 is provided with a positioning groove 332, and a discharge groove 331 is opened on the discharge shape switching plate 33. The discharge panel 32 is provided with multiple extrusion ports 34 of various shapes and specifications.

[0039] Specifically, during the plastic extrusion process, the position of the discharge trough 331 and the corresponding shaped extrusion port 34 can be adjusted so that the plastic is discharged from the corresponding shaped extrusion port 34, which can be adjusted according to the different plastic particle shapes required.

[0040] In one embodiment of the present invention, such as Figure 3 As shown, the discharge seat 1 is equipped with a thermal control mechanism 5, including a heating liner 53 and a cooling pipe 52. The heating liner 53 is located outside the material channel 14, and the cooling pipe 52 is located outside the heating liner 53. An insulating liner 51 is also provided outside the cooling pipe 52 to maintain its temperature. It should be noted that the heating liner 53 is a liner material with electric heating function, and the refrigerant in the cooling pipe 52 can be cooling gas or cooling oil.

[0041] Specifically, during the plastic extrusion process, in order to regulate the temperature of the molten plastic in the feed channel 14, the heating liner 53 is heated by the heat controller 54 to regulate the temperature rise of the molten plastic in the feed channel 14, and the refrigerant in the cooling pipe 52 is sent in by the heat controller 54 to regulate the temperature drop of the molten plastic in the feed channel 14.

[0042] In one embodiment of the present invention, such as Figure 8 As shown, the feed end of the feed channel 14 is provided with a feed limiting ring 12 to limit the extrusion screw 6, prevent the extrusion screw 6 from entering the feed channel 14 and prevent it from contacting or colliding with the cleaning head 474.

[0043] To clearly illustrate the above embodiments, refer to Figures 1-8 The specific working principle of the discharge device for the extruder of the present invention is as follows: During the extrusion of plastic granules, the mounting flange 21 at the feed end of the feed pipe 2 is first connected to the end of the barrel of the screw extruder, ensuring that the end of the screw enters the inside of the feed pipe 2. The plastic granules to be mixed are softened after being mixed by the screw and enter the feed channel 14. After passing through the feed channel 14, the molten plastic is discharged after being constrained by the discharge panel 32 at the end of the discharge seat 1, forming strip-shaped plastic, which is then cooled and granulated.

[0044] After the screw extruder stops, the screw joint 31 is rotated to separate from the discharge joint 13, allowing the discharge panel 32 and discharge shape switching plate 33 to be removed. Subsequently, the air pump 441 generates airflow, which enters the hollow groove 432 inside the cleaning push rod 43 through the air pipe 442, then passes through the venting chute 473 to the top of the buffer valve plate 476, and finally exits downward through the one-way exhaust valve 479. The air pressure compresses the molten plastic, effectively emptying the molten plastic in the feed channel 14.

[0045] After the molten plastic in the feed channel 14 is emptied, before the cleaning head 474 cleans it, lubricating oil or softener can be injected into the inner wall of the feed channel 14 through the oil injection nozzle 11 to reduce the adhesion of plastic residue in the feed channel 14 and improve the peeling efficiency of the residue.

[0046] Subsequently, the telescopic push rod 41 drives the support seat 42 to move downward, which in turn drives the cleaning push rod 43 at the bottom of the support seat 42 to move downward. The cleaning push rod 43 drives the cleaning head 474 to move in the material channel 14, and the cleaning blade 477 at its bottom edge is adapted to the inner wall of the material channel 14 to scrape.

[0047] During the process of cleaning the blade 477 scraping the inner wall of the material channel 14, the drive motor 451 drives the drive gear 453 to rotate, and the drive gear 453 drives the driven gear plate 452 to rotate. The inner gear plate 455 on the inner side of the driven gear plate 452 meshes with the strip teeth 433 on the surface of the cleaning push rod 43, driving the cleaning push rod 43 to rotate. Therefore, during the process of the cleaning push rod 43 driving the cleaning head 474 and the cleaning blade 477 to scrape downwards, the rotation of the cleaning push rod 43 drives the cleaning blade 477 to rotate. At this time, the serrated cleaning blade 477 rotates to clean, reducing the cleaning resistance of the cleaning blade 477 and making it easier to scrape the plastic residue on the inner wall of the material channel 14 clean.

[0048] Furthermore, during the downward movement of the cleaning push rod 43, the vertical vibrator 46 at the top of the cleaning push rod 43 provides vertical vibration force, which provides vertical vibration force to the cleaning head 474 and the cleaning cutter head 477 during their movement, creating a knocking effect on the plastic residue on the inner wall of the material channel 14, so that the plastic residue is fully peeled off, and preventing the cleaning head 474 from getting stuck.

[0049] Additionally, during the cleaning process of the cleaning head 474 cleaning the inner wall of the feed channel 14, the airflow can be used to blow the residue cleaned from the feed channel 14 downwards. Finally, the plastic residue is fully discharged from the bottom of the feed channel 14, reducing residue.

[0050] In summary, the extruder discharge device of this invention provides a material channel inside the discharge seat, and a slidable cleaning head is provided in the material channel. The cleaning head is moved by a cleaning push rod. During the movement of the cleaning head, the cleaning blade at its bottom edge adapts to the inner wall of the material channel to scrape and clean the inner wall of the discharge seat, effectively removing the plastic residue attached to the material channel and effectively cleaning the inner wall of the discharge seat, thus reducing residue.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A discharge device for an extruder, characterized in that, The system includes a discharge seat (1) and a discharge cleaning mechanism (4) disposed in the discharge seat (1). The discharge cleaning mechanism (4) includes a cleaning push rod (43) and a cleaning head assembly (47). The discharge seat (1) has a material channel (14) inside. The cleaning head assembly (47) is disposed inside the material channel (14). The cleaning push rod (43) is disposed at one end of the cleaning head assembly (47). The discharge seat (1) is provided with a feeding pipe (2), which is connected to the material channel (14). The cleaning head assembly (47) includes a cleaning head (474) and a cleaning cutter (477), wherein the top of the cleaning head (474) is connected to the cleaning push rod (43), the cleaning head (474) is adapted to the inner wall of the material channel (14), and the cleaning cutter (477) is disposed on the bottom edge of the cleaning head (474).

2. The discharge device for an extruder according to claim 1, characterized in that, A buffer valve plate (476) is slidably provided on the inner side of the cleaning head (474). A telescopic cover (478) of elastic material is provided between the buffer valve plate (476) and the cleaning head (474). A spring (472) is provided on the top of the buffer valve plate (476). A guide slide rod (471) is provided on the buffer valve plate (476).

3. The discharge device for an extruder according to claim 1, characterized in that, The cleaning cutter head (477) has a sawtooth structure. The discharge seat (1) is provided with a rotary drive assembly (45) for driving the cleaning cutter head (477) to rotate, including a rotating base (454), a driven gear and a drive motor (451). The outer circumferential wall of the cleaning push rod (43) is provided with strip teeth (433). The rotating base (454) is fixedly installed on the top of the discharge seat (1). A driven gear disk (452) is rotatably installed on the inner side of the rotating base (454). An inner gear disk (455) is provided through the middle of the driven gear disk (452). The cleaning push rod (43) passes through the inner gear disk (455), and the strip teeth (433) and the inner gear disk (455) are adapted to each other. The drive motor (451) is mounted on the rotating base (454), and a drive gear (453) is mounted on the output shaft of the drive motor (451). The drive gear (453) meshes with the outer gear disk (456) on the outer circumference of the driven gear.

4. The discharge device for an extruder according to claim 2, characterized in that, The discharge seat (1) is provided with a telescopic push rod (41), and the output shaft end of the telescopic push rod (41) is provided with a bearing seat (42). The top of the cleaning push rod (43) is connected to the bearing seat (42). A vertical vibrator (46) is provided between the bearing seat (42) and the cleaning push rod (43). A sealed bearing (431) is provided between the vertical vibrator (46) and the cleaning push rod (43). The discharge seat (1) is also provided with a guide telescopic rod (48), the top of which is connected to the support seat (42).

5. The discharge device for an extruder according to claim 4, characterized in that, The support base (42) is also provided with an air blowing assembly (44), including an air blowing pump (441) provided on the support base (42). The cleaning push rod (43) is provided with a hollow groove (432). The air blowing pump (441) is connected to the upper side of the sealed bearing (431) through an air blowing pipe (442). The hollow groove (432) is connected to the air blowing pipe (442) through the sealed bearing (431). A one-way exhaust valve (479) is provided through the buffer valve plate (476), and a breathable groove (473) is provided on the top of the guide slide rod (471). The guide slide rod (471) is slidably connected to the hollow groove (432).

6. The discharge device for an extruder according to claim 1, characterized in that, The discharge seat (1) is provided with an oil injection nozzle (11), which is connected to the material channel (14). A sealing ring (475) is provided on the outer wall of the cleaning head (474).

7. The discharge device for an extruder according to claim 1, characterized in that, The discharge end of the material channel (14) is provided with a discharge connector (13), and the discharge connector (13) is provided with a discharge shape adjustment component (3), including a discharge panel (32) and a discharge shape switching plate (33). The discharge panel (32) is connected to the discharge connector (13) by a spiral connector (31), and the discharge shape switching plate (33) is located between the discharge connector (13) and the discharge panel (32). The edge of the discharge shape switching plate (33) is provided with a positioning slot (332), the discharge shape switching plate (33) is provided with a discharge slot (331), and the discharge panel (32) is provided with a plurality of extrusion ports (34) of different shapes and specifications.

8. The discharge device for an extruder according to claim 1, characterized in that, The discharge seat (1) is equipped with a thermal control mechanism (5), including a heating liner (53) and a cooling pipe (52). The heating liner (53) is located on the outside of the material channel (14), and the cooling pipe (52) is located on the outside of the heating liner (53). A heat insulation liner (51) is also provided on the outside of the cooling pipe (52).

9. The discharge device for an extruder according to claim 1, characterized in that, The feed end of the feed channel (14) is provided with a feed limiting ring (12).

Images