Double-screw extruder for sealant production

Abstract

The double-screw extruder comprises a machine body, a mixing barrel is arranged at the left end of the top of the machine body, a cleaning box is arranged at the right end of the top of the machine body, and an opening is formed in the left side of the bottom of the mixing barrel and communicated with the interior of the machine body. The stirring device is reasonable in design, rotation of the main rod and the stirring rod is achieved through meshing of the first gear and the second gear, so that raw materials are fully stirred and mixed, and the stirring mechanism moves up and down through the lifting mechanism; through the arrangement of the sealing plate, good internal sealing performance can be kept under the action of the sealing plate when raw materials are mixed in the mixing barrel, the stirring effect is improved, the lifting mechanism can lift the stirring mechanism, then the lifting mechanism and the stirring mechanism are rotated by combining with the rotating mechanism, and after the lifting mechanism and the stirring mechanism rotate to 180 degrees, the stirring effect is improved. And then the stirring mechanism is moved downwards into the cleaning box through the lifting mechanism, and the purpose of cleaning is achieved through self rotation of the stirring mechanism.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of sealant production equipment, and particularly relates to a twin-screw extruder for sealant production. Background Art

[0002] The production of sealant, like most plastic production, is carried out by an extruder. The twin-screw extruder relies on the pressure and shear force generated by the rotation of the screw to enable the material to be fully plasticized and evenly mixed, and is extruded and formed through a die.

[0003] The inventor found the following defects during the operation of specific embodiments:

[0004] The patent application number 《201921697198.8》 discloses a patent authorization document named 《A twin-screw extruder for sealant production with a new feeding mechanism》. Through the double-cross stirring blade structure set and the air jet channel structure set at the lower end between them, the sealant extrusion raw materials entering the inside of the feeding cylinder are fully cross-stirred and mixed. At the same time, the air jet channel can jet the raw materials at the center of the cross-stirring upward to prevent the calcium carbonate powder particles at the center of the cross-stirring from settling downward, ensuring that the calcium carbonate powder particles are fully stirred by the cross-stirring blades and fully mixed with the liquid raw material polymer, effectively improving the stirring and mixing efficiency of the sealant extrusion raw materials as a whole, and thus improving the extrusion and forming quality of the sealant.

[0005] After the stirring blade structure in the above mechanism stirs and mixes the raw materials, the stirring assembly will remain in the inside of the feeding cylinder. When the stirring assembly is in use, raw materials will stick to it, and there will also be some raw materials sticking to the inner side wall of the feeding cylinder. The stirring assembly is inside the feeding cylinder, resulting in inconvenient cleaning, and the stirring assembly cannot be effectively cleaned, affecting the production effect of subsequent other sealants.

[0006] It should be noted that the above content belongs to the technical cognition scope of the inventor. Due to the vast and extremely complex technical content in this field, the above content of this application does not necessarily constitute the prior art. Content of the Utility Model

[0007] 1. Technical problems to be solved by the utility model:

[0008] The utility model provides a twin-screw extruder for sealant production to solve the technical problems existing in the above background art.

[0009] 2. Technical solutions:

[0010] To achieve the above object, the technical solution provided by the present utility model is: a twin-screw extruder for sealant production, including a machine body. A mixing cylinder is provided at the left end of the top of the machine body, and a cleaning box is provided at the right end of the top of the machine body. An opening is provided at the left side of the bottom of the mixing cylinder and is communicated with the inside of the machine body. The top of the mixing cylinder is open, and a sealing plate is hermetically provided at the top of the mixing cylinder. A connecting plate is fixedly connected to the top of the sealing plate, and a feeding hopper is provided at the top of the connecting plate. The inside of the feeding hopper allows raw materials to enter the inside of the mixing cylinder; a stirring mechanism is provided on one side of the connecting plate near the feeding hopper, and the stirring mechanism can realize the stirring and mixing of raw materials; a lifting mechanism is provided on one side of the stirring mechanism, and the lifting mechanism can realize the up and down movement of the stirring mechanism; a rotating mechanism is provided on the lifting mechanism, and the rotating mechanism can realize the rotation of the stirring mechanism, and the cleaning box realizes the cleaning of the stirring mechanism.

[0011] Further, a blanking port is opened in the connecting plate directly opposite the bottom of the feeding hopper, and a blanking cylinder is connected to the bottom of the blanking port. A feeding port is opened in the sealing plate directly opposite the bottom of the blanking cylinder, and the feeding port is communicated with the inside of the mixing cylinder.

[0012] Further, the stirring mechanism includes a first motor, which is installed above the connecting plate. The output end of the first motor is connected to a rotating shaft. A first gear is connected to the outside of the rotating shaft above the connecting plate. A second gear is engaged with one side of the first gear. A main rod is connected to the inside of the second gear, and stirring rods are evenly distributed on the outer wall of the main rod.

[0013] Further, the lifting mechanism includes a top plate, which is located above the right side of the feeding hopper. A second motor is installed at one end of the top of the top plate. The output end of the second motor is connected to a threaded rod. A vertical rod is fixedly connected to the end of the bottom of the top plate away from the threaded rod. The outside of the threaded rod and the vertical rod are both sleeved with movable seats. The movable seats are threadedly connected to the threaded rod, and the movable seats are slidably connected to the vertical rod. One side of the connecting plate is fixedly connected to an extension plate, and one ends of the two movable seats are respectively connected to both sides of the extension plate.

[0014] Further, the rotating mechanism includes a central rod. The top end of the central rod is fixedly connected to the bottom wall of the top plate, and the bottom end of the central rod is rotatably connected to the top of the machine body. The upper end of the outer wall of the central rod is sleeved with a third gear. The extension plate is also sleeved on the outer wall of the central rod. One side wall of the central rod is connected with a fitting strip. A fitting groove is opened on one side of the inner sleeve of the extension plate and the third gear. The fitting strip is fitted inside the fitting groove. The rotating shaft passes through the inner side of the connecting plate and its bottom end is connected with a moving block. One side of the upper surface of the sealing plate is provided with an electric push rod. The end of the actuating rod of the electric push rod is connected to the side wall of the moving block. A sliding groove is opened on the top surface of the sealing plate. The bottom of the moving block slides in the sliding groove. A through groove is opened on one side of the connecting plate. The through groove extends to the inner side of the extension plate. Auxiliary grooves are opened on both sides of the through groove. A sliding block is slidably connected inside the auxiliary groove. One end of each of the two sliding blocks is connected to the side wall of the rotating shaft. The first gear can move to one side of the third gear and mesh with it.

[0015] Further, an adjusting electromagnet is provided at the bottom end of the main rod. A central sleeve is provided in the middle of the inner bottom wall of the mixing cylinder. A central magnet is provided inside the central sleeve. The bottom end of the main rod can rotate inside the central sleeve. The adjusting electromagnet can be electrified and adsorbed with the central magnet. The periphery of the central sleeve is connected with a cleaning brush sleeve through a fixing rod. The outer side wall of the cleaning brush sleeve can be in contact with the inner side wall of the mixing cylinder.

[0016] 3. Beneficial effects:

[0017] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0018] The present utility model is reasonably designed. Through the meshing of the first gear and the second gear, the rotation of the main rod and the stirring rod is realized, so that the raw materials are fully stirred and mixed. Through the up and down movement of the stirring mechanism by the lifting mechanism, the inside of the mixing cylinder can maintain good sealing performance under the action of the sealing plate during the mixing of raw materials, improving the stirring effect. And after the lifting mechanism raises the stirring mechanism, combined with the rotating mechanism, the lifting mechanism and the stirring mechanism can be rotated. After rotating 180 degrees, the stirring mechanism is lowered into the cleaning box by the lifting mechanism, and the purpose of cleaning is achieved through the self-rotation of the stirring mechanism;

[0019] Through the cooperative setting among the adjusting electromagnet, the central sleeve, the central magnet, the fixing rod and the cleaning brush sleeve, the cleaning brush sleeve can remain stationary during rotation. When the main rod rises, through the adsorption of the adjusting electromagnet and the central magnet, the cleaning brush sleeve is connected to the main rod. Through the rising action, the cleaning brush sleeve cleans the inner side wall of the mixing cylinder, and the raw materials remaining on the inner wall can be scraped off and dropped, reducing the excessive waste of raw materials.

[0020] It should be noted that the structures not introduced in the present utility model are the same as the prior art or can be implemented using the prior art since they do not involve the design key points and improvement directions of the present utility model, and thus will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure after the stirring mechanism of the present utility model rises;

[0023] Figure 3 is a schematic diagram of the meshing structure of the first gear and the second gear of the present utility model;

[0024] Figure 4 is a schematic diagram of the component structure between the sealing plate and the connecting plate of the present utility model;

[0025] Figure 5 is a schematic diagram of the lifting mechanism of the present utility model;

[0026] Figure 6 is a schematic diagram of the cleaning sleeve brush of the present utility model.

[0027] REFERENCE MARKS:

[0028] 1, body; 2, mixing cylinder; 3, cleaning tank; 4, sealing plate; 5, connecting plate; 6, feed hopper; 7, blanking cylinder; 8, first motor; 9, rotating shaft; 10, first gear; 11, second gear; 12, main rod; 1201, stirring rod; 13, top plate; 14, second motor; 15, screw rod; 16, vertical rod; 17, movable seat; 18, extension plate; 19, central rod; 1901, fitting strip; 20, third gear; 21, fitting groove; 22, moving block; 23, electric push rod; 24, through groove; 25, auxiliary groove; 26, adjusting electromagnet; 27, central sleeve; 28, central magnet; 29, fixed rod; 30, cleaning sleeve brush. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", "provided with", "provided in", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Embodiment

[0033] Referring to the attached Figure 1-6 , a twin-screw extruder for sealant production, comprising a machine body 1. A mixing cylinder 2 is provided at the left end of the top of the machine body 1, and a cleaning box 3 is provided at the right end of the top of the machine body 1. An opening is provided at the left side of the bottom of the mixing cylinder 2 and is communicated with the inside of the machine body 1. The top of the mixing cylinder 2 is open, and a sealing plate 4 is hermetically provided at the top of the mixing cylinder 2. A connecting plate 5 is fixedly connected to the top of the sealing plate 4. A feed hopper 6 is provided at the top of the connecting plate 5, and raw materials enter the inside of the mixing cylinder 2 through the feed hopper 6; a stirring mechanism is provided at one side of the connecting plate 5 near the feed hopper 6, and the stirring mechanism can realize the stirring and mixing of the raw materials; a lifting mechanism is provided at one side of the stirring mechanism, and the lifting mechanism can realize the up and down movement of the stirring mechanism; a rotating mechanism is provided on the lifting mechanism, and the rotating mechanism can realize the rotation of the stirring mechanism, and the cleaning box 3 realizes the cleaning of the stirring mechanism.

[0034] In this embodiment, a blanking port is provided inside the connecting plate 5 opposite to the bottom of the feeding hopper 6. The bottom of the blanking port is connected to a blanking cylinder 7. An inlet port is provided inside the sealing plate 4 opposite to the bottom of the blanking cylinder 7. The inlet port is communicated with the inside of the mixing cylinder 2.

[0035] It should be noted that the production raw materials enter the inside of the mixing cylinder 2 through the feeding hopper 6, the blanking port and the inlet port, which is convenient for mixing the raw materials.

[0036] In this embodiment, the stirring mechanism includes a first motor 8. The first motor 8 is installed above the connecting plate 5. The output end of the first motor 8 is connected to a rotating shaft 9. A first gear 10 is connected to the outside of the rotating shaft 9 at the upper part of the connecting plate 5. A second gear 11 is meshed with one side of the first gear 10. A main rod 12 is connected inside the second gear 11. Stirring rods 1201 are evenly distributed on the outer wall of the main rod 12.

[0037] It should be noted that by starting the first motor 8 to drive the rotating shaft 9 to rotate, the rotating shaft 9 drives the first gear 10 to rotate, the first gear 10 drives the second gear 11 to rotate, and the second gear 11 drives the main rod 12 and the stirring rods 1201 to rotate, so as to realize the stirring and mixing of the raw materials.

[0038] In this embodiment, the lifting mechanism includes a top plate 13. The top plate 13 is located above the right side of the feeding hopper 6. A second motor 14 is installed at one end of the top of the top plate 13. The output end of the second motor 14 is connected to a threaded rod 15. A vertical rod 16 is fixedly connected to the bottom of the top plate 13 at the end far from the threaded rod 15. Movable seats 17 are sleeved on the outside of both the threaded rod 15 and the vertical rod 16. The movable seats 17 are threadedly connected to the threaded rod 15. The movable seats 17 are slidably connected to the vertical rod 16. An extension plate 18 is fixedly connected to one side of the connecting plate 5. One ends of the two movable seats 17 are respectively connected to both sides of the extension plate 18.

[0039] It should be noted that by driving the threaded rod 15 to rotate through the second motor 14, the threaded rod 15 drives the movable seats 17 and the extension plate 18 downward, so that the connecting plate 5 and the sealing plate 4 move downward until the stirring mechanism is moved into the inside of the mixing cylinder 2, and the sealing plate 4 seals the top of the mixing cylinder 2. When it is necessary to clean the stirring mechanism, start the second motor 14 again to drive the threaded rod 15 to rotate in the reverse direction, drive the movable seats 17 and the extension plate 18 to drive the sealing plate 4 and the connecting plate 5 to rise, so that the stirring mechanism is taken out from the inside of the mixing cylinder 2.

[0040] In this embodiment, the rotating mechanism includes a central rod 19. The top end of the central rod 19 is fixedly connected to the bottom wall of the top plate 13, and the bottom end of the central rod 19 is rotatably connected to the top of the machine body 1. The upper end of the outer wall of the central rod 19 is sleeved with a third gear 20. The extension plate 18 is also sleeved on the outer wall of the central rod 19. One side wall of the central rod 19 is connected with a fitting strip 1901. A fitting groove 21 is formed on one side of the inner sleeve openings of the extension plate 18 and the third gear 20. The fitting strip 1901 is fitted into the inside of the fitting groove 21. The rotating shaft 9 passes through the inside of the connection plate 5 and its bottom end is connected with a moving block 22. One side of the upper surface of the sealing plate 4 is provided with an electric push rod 23. The end of the actuating rod of the electric push rod 23 is connected to the side wall of the moving block 22. A sliding groove is formed on the top surface of the sealing plate 4. The bottom of the moving block 22 slides in the sliding groove. A through groove 24 is formed on one side of the connection plate 5. The through groove 24 extends to the inside of the extension plate 18. Auxiliary grooves 25 are formed on both sides of the through groove 24. Sliding blocks are slidably connected to the inside of the auxiliary grooves 25. One end of the two sliding blocks is connected to the side wall of the rotating shaft 9. The first gear 10 can be moved to one side of the third gear 20 and meshed with it.

[0041] It should be noted that when the stirring assembly rises to a certain height, the actuating rod of the electric push rod 23 extends outwards to push the moving block 22 to slide outwards in the sliding groove. At the same time, the rotating shaft 9, the first gear 10 and the first motor 8 move outwards simultaneously. The sliding blocks on the side of the rotating shaft 9 slide in the auxiliary grooves 25 to move the first gear 10 to be meshed with the third gear 20. The first motor 8 drives the first gear 10 to drive the third gear 20 to rotate. Due to the fitting of the fitting strip 1901 and the fitting groove 21, the third gear 20 can drive the central rod 19 to rotate. The rotation of the central rod 19 causes the lifting mechanism and the stirring mechanism to rotate together, so that the stirring mechanism is located above the cleaning tank 3. Combined with the downward movement of the stirring mechanism by the lifting mechanism, a better cleaning effect of the stirring mechanism inside the cleaning tank 3 can be obtained.

[0042] In this embodiment, an adjusting electromagnet 26 is provided at the bottom end of the main rod 12. A central sleeve 27 is provided in the middle of the inner bottom wall of the mixing cylinder 2. A central magnet 28 is provided inside the central sleeve 27. The bottom end of the main rod 12 can rotate inside the central sleeve 27. The adjusting electromagnet 26 can be electrified and adsorbed with the central magnet 28. The periphery of the central sleeve 27 is connected with a cleaning brush sleeve 30 through a fixing rod 29. The outer side wall of the cleaning brush sleeve 30 can be in contact with the inner side wall of the mixing cylinder 2.

[0043] It should be noted that the central sleeve 27 is sleeved at the bottom of the main rod 12 by controlling the adjusting electromagnet 26 and the central magnet 28, so that the cleaning brush sleeve 30 can rise and fall together with the stirring mechanism to realize the cleaning of the inner side wall of the mixing cylinder 2. And when the stirring mechanism rotates, the connection with the cleaning brush sleeve 30 is released, so that the cleaning brush sleeve 30 remains in place.

[0044] Working principle of the utility model: When a twin-screw extruder is used in sealant production, first, the second motor 14 drives the threaded rod 15 to rotate. The threaded rod 15 drives the movable seat 17 and the extension plate 18 downward, causing the connecting plate 5 and the sealing plate 4 to move downward until the stirring mechanism is moved into the mixing cylinder 2. The energization of the adjusting electromagnet 26 and the central magnet 28 is released, so that the cleaning sleeve brush 30 is located at the inner bottom of the mixing cylinder 2, and the sealing plate 4 seals the top of the mixing cylinder 2. At this time, the production raw materials enter the inside of the mixing cylinder 2 through the feed hopper 6, the blanking port and the feed port. The first motor 8 is started to drive the rotating shaft 9 to rotate. The rotating shaft 9 drives the first gear 10 to rotate. The first gear 10 drives the second gear 11 to rotate. The second gear 11 drives the main rod 12 and the stirring rod 1201 to rotate, thus realizing the stirring and mixing of the raw materials. The mixed raw materials are discharged through the opening into the inside of the machine body 1. The power is used to drive the two gears to rotate, causing the two screws to rotate, and finally the sealant is discharged through the extrusion port; When the stirring mechanism needs to be cleaned, the central sleeve 27 is controlled to be sleeved on the bottom of the main rod 12 by the adjusting electromagnet 26 and the central magnet 28. The second motor 14 is started again to drive the threaded rod 15 to rotate in the reverse direction, driving the movable seat 17 and the extension plate 18 to drive the sealing plate 4 and the connecting plate 5 to rise, so that the stirring mechanism and the cleaning sleeve brush 30 can be lifted together. During the rising process of the cleaning sleeve brush 30, due to the contact with the inner side wall of the mixing cylinder 2, the raw materials remaining on its inner side wall can be scraped off. When the stirring assembly rises to a certain height, the electric push rod 23 extends the actuating rod to push the moving block 22 to slide outward in the chute. At the same time, the rotating shaft 9, the first gear 10 and the first motor 8 move outward at the same time. The sliding block on the side of the rotating shaft 9 slides inside the auxiliary groove 25, moving the first gear 10 to mesh with the third gear 20. The first motor 8 drives the first gear 10 to drive the third gear 20 to rotate. Due to the engagement of the engaging strip 1901 and the engaging groove 21, the third gear 20 can drive the central rod 19 to rotate. The rotation of the central rod 19 causes the lifting mechanism and the stirring mechanism to rotate together. After rotating 180 degrees, the sealing plate 4 is driven downward by the threaded rod 15, so that the main rod 12, the stirring rod 1201 and the cleaning sleeve brush 30 enter the inside of the cleaning box 3. The contraction of the actuating rod of the electric push rod 23 causes the first gear 10 to mesh with the second gear 11 again, and the main rod 12 and the stirring rod 1201 rotate to complete the cleaning, improving the cleaning effect of the stirring mechanism.

[0045] The above embodiments only represent a certain implementation mode of the utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent; It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model; Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A twin-screw extruder for the production of sealant, characterized in that: It includes a machine body (1). At the left end of the top of the machine body (1), there is a mixing cylinder (2). At the right end of the top of the machine body (1), there is a cleaning box (3). At the left side of the bottom of the mixing cylinder (2), there is an opening, which is communicated with the inside of the machine body (1). The top of the mixing cylinder (2) is open. A sealing plate (4) is hermetically arranged at the top of the mixing cylinder (2). A connecting plate (5) is fixedly connected to the top of the sealing plate (4). A feeding hopper (6) is arranged at the top of the connecting plate (5). The raw materials enter the inside of the mixing cylinder (2) through the feeding hopper (6); on one side of the connecting plate (5) near the feeding hopper (6), there is a stirring mechanism, and the stirring mechanism can realize the stirring and mixing of the raw materials; on one side of the stirring mechanism, there is a lifting mechanism, and the lifting mechanism can realize the up and down movement of the stirring mechanism; on the lifting mechanism, there is a rotating mechanism, and the rotating mechanism can realize the rotation of the stirring mechanism, and the cleaning box (3) realizes the cleaning of the stirring mechanism.

2. The twin-screw extruder for sealant production according to claim 1, wherein: A blanking port is opened in the connecting plate (5) directly opposite to the bottom of the feeding hopper (6). The bottom of the blanking port is connected with a blanking cylinder (7). A feeding port is opened in the sealing plate (4) directly opposite to the bottom of the blanking cylinder (7). The feeding port is communicated with the inside of the mixing cylinder (2).

3. The twin-screw extruder for sealant production according to claim 2, characterized in that: The stirring mechanism includes a first motor (8). The first motor (8) is installed above the connecting plate (5). The output end of the first motor (8) is connected with a rotating shaft (9). A first gear (10) is connected to the outside of the rotating shaft (9) above the connecting plate (5). A second gear (11) is meshed with one side of the first gear (10). A main rod (12) is connected to the inside of the second gear (11). Stirring rods (1201) are evenly distributed on the outer wall of the main rod (12).

4. A twin-screw extruder for the production of sealant according to claim 3, characterized in that: The lifting mechanism includes a top plate (13). The top plate (13) is located above the right side of the feeding hopper (6). At one end of the top of the top plate (13), a second motor (14) is installed. The output end of the second motor (14) is connected with a threaded rod (15). At the end of the bottom of the top plate (13) far from the threaded rod (15), a vertical rod (16) is fixedly connected. Sliding seats (17) are sleeved on the outside of both the threaded rod (15) and the vertical rod (16). The sliding seat (17) is threadedly connected with the threaded rod (15). The sliding seat (17) is slidably connected with the vertical rod (16). An extension plate (18) is fixedly connected to one side of the connecting plate (5). One ends of the two sliding seats (17) are respectively connected to both sides of the extension plate (18).

5. The twin-screw extruder for sealant production according to claim 4, characterized in that: The rotation mechanism includes a central rod (19), the top end of the central rod (19) is fixedly connected to the bottom wall of the top plate (13), the bottom end of the central rod (19) is rotatably connected to the top of the machine body (1), a third gear (20) is sleeved on the upper end of the outer wall of the central rod (19), the extension plate (18) is also sleeved on the outer wall of the central rod (19), a fitting strip (1901) is connected to one side wall of the central rod (19), a fitting groove (21) is opened on one side of the inner sleeve opening of the extension plate (18) and the third gear (20), and the fitting strip (1901) is fitted inside the fitting groove (21). The rotating shaft (9) passes through the inner side of the connecting plate (5) and its bottom end is connected with a moving block (22). An electric push rod (23) is arranged on one side of the upper surface of the sealing plate (4), and the end of the actuating rod of the electric push rod (23) is connected to the side wall of the moving block (22). A sliding groove is opened on the top surface of the sealing plate (4), and the bottom of the moving block (22) slides in the sliding groove. A through groove (24) is opened on one side of the connecting plate (5), the through groove (24) extends and is opened inside the extension plate (18), auxiliary grooves (25) are opened on both sides of the through groove (24), sliding blocks are slidably connected inside the auxiliary grooves (25), and one ends of the two sliding blocks are connected to the side wall of the rotating shaft (9). The first gear (10) can move to one side of the third gear (20) and mesh with it.

6. A twin-screw extruder for sealant production according to claim 5, characterized in that: An adjusting electromagnet (26) is arranged at the bottom end of the main rod (12), a central sleeve (27) is arranged in the middle of the inner bottom wall of the mixing cylinder (2), a central magnet (28) is arranged inside the central sleeve (27), the bottom end of the main rod (12) can rotate inside the central sleeve (27), the adjusting electromagnet (26) can be electrified and adsorbed with the central magnet (28), the central sleeve (27) is connected with a cleaning sleeve brush (30) through a fixing rod (29) around it, and the outer side wall of the cleaning sleeve brush (30) can be in contact with the inner side wall of the mixing cylinder (2).

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