Screw cleaning device of double-screw extruder

Abstract

The utility model relates to the technical field of extruder screw cleaning, and discloses a double-screw extruder screw cleaning device which comprises a first servo motor, a second adaptive clamping block, a hopper and a first adaptive clamping block, and is characterized in that the first servo motor is fixedly connected with the outer side of the hopper; the output end of the first servo motor penetrates through the hopper to be fixedly connected with one side of the second adaptive clamping block, the first adaptive clamping block is arranged on the side, away from the second adaptive clamping block, of the hopper, and the first adaptive clamping block and the second adaptive clamping block can be used for fixing a screw to be cleaned from the two ends in an inserted mode. According to the grinding device, the first adaptive clamping block and the second adaptive clamping block are matched with each other, the screw is inserted and fixed from the two ends and then placed into the hopper filled with grinding materials, the grinding materials can clean the surfaces of the screws in various complex space shapes, dead-corner-free cleaning is achieved, and cleaning is more thorough.

Description

Technical Field

[0001] The utility model relates to the technical field of screw cleaning devices for extruders, in particular to a screw cleaning device for a twin-screw extruder. Background Art

[0002] The screw of an extruder is one of the most important components of the extruder. It directly affects the output, quality and stability of the extruder. As the extruder is used for a long time, some materials will remain on the outer surface of the screw. These materials will be mixed with the new unmelted materials, affecting the quality and efficiency of the production products. Therefore, regularly cleaning the screw of the extruder can ensure the normal operation of the extruder and avoid various problems during the production process. However, the existing screw cleaning devices for extruders generally have the following technical problems in actual use:

[0003] There are various types of screws for extruders, including gradually changing types, abrupt change types, wavy types, barrier types, double-screen types, conical types, flow-dividing types, etc. The designs and characteristics of these screws are different. The surface structures and spatial structures of some screws are extremely complex, which makes it difficult for ordinary cleaning methods to reach the dead corners on the screw surface, resulting in insufficient cleaning by the screw cleaning device, which may affect the quality of the products processed by the extruder. Based on this, a screw cleaning device for a twin-screw extruder that can solve the above problems is proposed. Summary of the Utility Model

[0004] To solve the technical problem of cleaning the screw of the extruder, the utility model provides a screw cleaning device for a twin-screw extruder.

[0005] The utility model is realized by adopting the following technical solutions: A screw cleaning device for a twin-screw extruder includes a first servo motor, a second adapter block, a hopper and a first adapter block. The first servo motor is fixedly connected to the outside of the hopper. The output end of the first servo motor passes through the hopper and is fixedly connected to one side of the second adapter block. The first adapter block is arranged on the side of the hopper away from the second adapter block. The first adapter block and the second adapter block can be inserted and fixed to the screw to be cleaned from both ends. A clamping plate assembly for installing and fixing the screw is arranged on one side of the first adapter block. A piston push rod assembly for injecting abrasive into the hopper is arranged on the lower side of the hopper.

[0006] As a further improvement of the above solution, the card board assembly includes an installation table, two card boards, card slots and a first threaded sleeve. The installation table is communicated with the side of the hopper away from the first servo motor. The card slots are opened inside the installation table. The inner sides of the two card slots are respectively slidably connected with one side of the card boards. Both sides of the card boards are fixedly connected to the outer surface of the first threaded sleeve. The first adapter block is rotatably connected to the first threaded sleeve. A threaded rod driving mechanism is arranged on one side of the installation table to make the first adapter block reciprocate back and forth along the card slot.

[0007] As a further improvement of the above solution, the threaded rod driving mechanism includes a first threaded rod and a boosting handle. The first threaded rod is rotatably connected to one side of the installation table. One end of the first threaded rod located outside the installation table is fixedly connected to the boosting handle. One end of the first threaded rod located inside the installation table is threadedly sleeved with the first threaded sleeve.

[0008] As a further improvement of the above solution, the piston push rod assembly includes a base and a central fixing cylinder. The upper side of the base is fixedly connected to the central fixing cylinder. The upper end of the central fixing cylinder is communicated with the hopper. A sealing piston assembly is arranged inside the central fixing cylinder.

[0009] As a further improvement of the above solution, the sealing piston assembly includes a piston, a sealing ring, a second threaded sleeve and a limiting cylinder. The piston is slidably connected to the inner cylindrical surface of the central fixing cylinder. The sealing ring is sleeved outside the piston. The outer edge of the sealing ring abuts against the inner surface of the central fixing cylinder. The limiting cylinder is fixedly connected to the outer side of the second threaded sleeve. An electric motor driving mechanism is arranged below the piston to make the piston move up and down along the inner surface of the central fixing cylinder.

[0010] As a further improvement of the above solution, the electric motor driving mechanism includes a bearing plate, a second servo motor, a second threaded rod and a limiting rod. The bearing plate is fixedly connected to the inner surface of the central fixing cylinder. The lower end of the limiting rod is fixedly connected to the upper side of the bearing plate. The upper end of the limiting rod is slidably connected to the inner side of the limiting cylinder. The lower side of the bearing plate is fixedly connected to the second servo motor. The output end of the second servo motor passes through the bearing plate upward and is fixedly connected to a second threaded rod. The second threaded rod is threadedly sleeved with the second threaded sleeve.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By the mutual cooperation of the first adapter block and the second adapter block, after the screw is inserted and fixed from both ends, it is placed in the hopper filled with abrasive. The abrasive can clean the surface of the screw with various different complex spatial shapes, achieving cleaning without dead angles and making the cleaning more thorough.

[0013] 2. The utility model can fix and clean the screws for extruders with different lengths through the cooperation of the clamping plate assembly and the first adapter block, improving the compatibility of the screw cleaning device for twin-screw extruders with different screws. Brief Description of the Drawings

[0014] Figure 1 The front view of a screw cleaning device for a twin-screw extruder provided by the utility model;

[0015] Figure 2 is Figure 1 the top view of;

[0016] Figure 3 the cross-sectional view of the utility model.

[0017] Main Symbol Description:

[0018] 1. Base; 2. Central fixing cylinder; 3. First thread sleeve; 4. Boosting handle; 5. Card slot; 6. Clamping plate; 7. First adapter block; 8. Hopper; 9. First servo motor; 10. Second adapter block; 11. First threaded rod; 12. Piston; 13. Sealing ring; 14. Second thread sleeve; 15. Second threaded rod; 16. Load-bearing plate; 17. Second servo motor; 18. Limiting rod; 19. Limiting cylinder; 20. Installation table. Specific Embodiment

[0019] Next, in combination with the drawings and specific embodiments, the utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0020] Embodiment:

[0021] Please combine Figures 1-3 , a screw cleaning device for a twin-screw extruder in this embodiment includes a first servo motor 9, a second adapter block 10, a hopper 8 and a first adapter block 7. The first servo motor 9 is fixedly connected to the outside of the hopper 8. An appropriate amount of polishing special garnet sand is loaded into the hopper 8. The output end of the first servo motor 9 passes through the hopper 8 and is fixedly connected to one side of the second adapter block 10. The first adapter block 7 is arranged on the side of the hopper 8 away from the second adapter block 10. The first adapter block 7 and the second adapter block 10 can insert and fix the screw to be cleaned from both ends. A clamping plate assembly for installing and fixing the screw is arranged on one side of the first adapter block 7. A piston push rod assembly for injecting the abrasive into the hopper 8 is arranged on the lower side of the hopper 8.

[0022] It should be noted that in this embodiment, the first adapter block 7 and the second adapter block 10 are pentagonal prisms. The first adapter block 7 is fixedly connected to one side of the first threaded sleeve 3 through a positioning nut, and the second adapter block 10 is fixedly connected to the output end of the first servo motor 9 through a positioning nut. Considering different screws, the slot mouth shapes opened at both ends may be different. Therefore, the first adapter block 7 and the second adapter block 10 can be disassembled through the positioning nut and replaced with suitable chucks.

[0023] Please refer to Figure 1 and Figure 2 As shown, the card plate assembly includes an installation table 20, two card plates 6, a card slot 5, and a first threaded sleeve 3. The installation table 20 is communicated with the side of the hopper 8 away from the first servo motor 9. The card slot 5 is opened inside the installation table 20. The inner sides of the two card slots 5 are respectively slidably connected to one side of the card plate 6. Both sides of the card plate 6 are fixedly connected to the outer surface of the first threaded sleeve 3. The first adapter block 7 is rotatably connected to the first threaded sleeve 3. A threaded rod driving mechanism for moving the first adapter block 7 back and forth along the card slot 5 is provided on one side of the installation table 20.

[0024] Please refer to Figure 2 As shown, the threaded rod driving mechanism includes a first threaded rod 11 and a boosting handle 4. The first threaded rod 11 is rotatably connected to one side of the installation table 20. One end of the first threaded rod 11 located outside the installation table 20 is fixedly connected to the boosting handle 4. One end of the first threaded rod 11 located inside the installation table 20 is threadedly sleeved with the first threaded sleeve 3.

[0025] Please refer to Figure 3 As shown, the piston push rod assembly includes a base 1 and a central fixed cylinder 2. An outer pull door is provided on one side of the lower surface of the central fixed cylinder 2. The upper side of the base 1 is fixedly connected to the central fixed cylinder 2. The upper end of the central fixed cylinder 2 is communicated with the hopper 8. A sealing piston assembly is arranged inside the central fixed cylinder 2.

[0026] Please refer to Figure 3 As shown, the sealing piston assembly includes a piston 12, a sealing ring 13, a second threaded sleeve 14, and a limiting cylinder 19. The piston 12 is slidably connected to the inner cylindrical surface of the central fixed cylinder 2. The sealing ring 13 is sleeved outside the piston 12. The outer edge of the sealing ring 13 abuts against the inner surface of the central fixed cylinder 2. The limiting cylinder 19 is fixedly connected to the outside of the second threaded sleeve 14. A motor driving mechanism for moving the piston 12 up and down along the inner surface of the central fixed cylinder 2 is provided below the piston 12.

[0027] Please refer to Figure 3As shown, the motor drive mechanism includes a load-bearing plate 16, a second servo motor 17, a second threaded rod 15, and a limiting rod 18. The load-bearing plate 16 is fixedly connected to the inner surface of the central fixed cylinder 2. The lower end of the limiting rod 18 is fixedly connected to the upper side of the load-bearing plate 16, and the upper end of the limiting rod 18 is slidably connected to the inner side of the limiting cylinder 19. The lower side of the load-bearing plate 16 is fixedly connected to the second servo motor 17. The output end of the second servo motor 17 passes upward through the load-bearing plate 16 and is fixedly connected to the second threaded rod 15. The second threaded rod 15 is threadedly sleeved with the second threaded sleeve 14.

[0028] The implementation principle of a screw cleaning device for a twin-screw extruder in an embodiment of the present application is as follows: The staff first docks one end of the removed screw with the second adapter block 10, and then rotates the assisting handle 4 to make the first threaded rod 11 rotate, pushing the first threaded sleeve 3 to move. At this time, the clamping plate 6 slides along the card slot 5, and the first threaded sleeve 3 pushes the first adapter block 7 at the front end to insert into the other end of the screw. Then, the first servo motor 9 is started, and the second adapter block 10 rotates to drive the screw to rotate. The second servo motor 17 is started, and the second threaded rod 15 rotates to push the second threaded sleeve 14 to move upward. At this time, one side of the limiting cylinder 19 slides along the outside of the limiting rod. The upward-moving second threaded sleeve 14 pushes the abrasive above to move upward as a whole until the screw surface is submerged by the abrasive. Through the forward and reverse reciprocating friction of the screw, the thorough cleaning of the screw surface can be realized.

[0029] The above implementation manners are only the preferred implementation manners of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. A screw cleaning device for a twin-screw extruder, comprising a first servo motor (9), a second adapter block (10), a hopper (8) and a first adapter block (7), characterized in that, The first servo motor (9) is fixedly connected to the outside of the hopper (8). The output end of the first servo motor (9) passes through the hopper (8) and is fixedly connected to one side of the second adapter block (10). The first adapter block (7) is arranged on the side of the hopper (8) away from the second adapter block (10). The first adapter block (7) and the second adapter block (10) can be inserted and fixed to the screw to be cleaned from both ends. One side of the first adapter block (7) is provided with a clamping plate assembly for mounting and fixing the screw. A piston push rod assembly for injecting abrasive into the hopper (8) is arranged on the lower side of the hopper (8).

2. The screw cleaning device of a twin-screw extruder according to claim 1, characterized in that The clamping plate assembly includes a mounting table (20), two clamping plates (6), a clamping groove (5) and a first threaded sleeve (3). The mounting table (20) communicates with the side of the hopper (8) away from the first servo motor (9). The clamping groove (5) is opened on the inner side of the mounting table (20). The inner sides of the two clamping grooves (5) are respectively slidably connected to one side of the clamping plate (6). Both sides of the clamping plate (6) and the outer surface of the first threaded sleeve (3) are fixedly connected. The first adapter block (7) is rotatably connected to the first threaded sleeve (3). A threaded rod driving mechanism for moving the first adapter block (7) back and forth along the clamping groove (5) is arranged on one side of the mounting table (20).

3. The screw cleaning device for a twin-screw extruder according to claim 2, wherein, The threaded rod driving mechanism includes a first threaded rod (11) and a boosting handle (4). The first threaded rod (11) is rotatably connected to one side of the mounting table (20). One end of the first threaded rod (11) located outside the mounting table (20) is fixedly connected to the boosting handle (4). One end of the first threaded rod (11) located inside the mounting table (20) is threadedly sleeved with the first threaded sleeve (3).

4. A screw cleaning device for a twin-screw extruder according to claim 1, characterized in that, The piston push rod assembly includes a base (1) and a central fixing cylinder (2). The upper side of the base (1) is fixedly connected to the central fixing cylinder (2). The upper end of the central fixing cylinder (2) communicates with the hopper (8). A sealing piston assembly is arranged inside the central fixing cylinder (2).

5. The screw cleaning device of a twin-screw extruder according to claim 4, characterized in that, The sealing piston assembly includes a piston (12), a sealing ring (13), a second threaded sleeve (14) and a limiting cylinder (19). The piston (12) is slidably connected to the inner cylindrical surface of the central fixing cylinder (2). The sealing ring (13) is sleeved outside the piston (12). The outer edge of the sealing ring (13) abuts against the inner surface of the central fixing cylinder (2). The limiting cylinder (19) is fixedly connected to the outside of the second threaded sleeve (14). A motor driving mechanism for moving the piston (12) up and down along the inner surface of the central fixing cylinder (2) is arranged below the piston (12).

6. The screw cleaning device of a twin-screw extruder according to claim 5, characterized in that, The motor driving mechanism includes a load-bearing plate (16), a second servo motor (17), a second threaded rod (15) and a limiting rod (18). The load-bearing plate (16) is fixedly connected to the inner surface of the central fixed cylinder (2). The lower end of the limiting rod (18) is fixedly connected to the upper side of the load-bearing plate (16). The upper end of the limiting rod (18) is slidably connected to the inner side of the limiting cylinder (19). The lower side of the load-bearing plate (16) is fixedly connected to the second servo motor (17). The output end of the second servo motor (17) passes upward through the load-bearing plate (16) and is fixedly connected to a second threaded rod (15). The second threaded rod (15) is threadedly sleeved with a second threaded sleeve (14).

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