Impurity removal device for extruder

Abstract

The impurity removal device comprises a rack and a conveying channel on the extruder, the conveying channel comprises a melting part and an impurity removal part, the cross section of the impurity removal part is U-shaped, a dust removal mechanism is arranged on the rack, and the dust removal mechanism comprises a filtering assembly, an exhaust fan and a washing assembly. The filtering assembly, the exhaust fan and the washing assembly are all installed on the rack, the inlet end of the filtering assembly communicates with the top end of the impurity removing part, the air inlet end of the exhaust fan communicates with the filtering assembly, the air outlet end of the exhaust fan communicates with the washing assembly, the filtering assembly is used for intercepting material impurities, and the washing assembly is used for washing the material impurities. The washing assembly is used for cleaning gas. The impurity removal effect of the impurity removal device of the extruder can be improved.

Description

Technical Field

[0001] This application relates to the field of material removal technology, and in particular to a removal device for an extruder. Background Art

[0002] Extruders have a wide range of applications in the plastics processing industry, primarily for the molding and production of plastics. An extruder uses the rotation of a screw to generate pressure and shear force, plasticizing and uniformly mixing the material, which is then formed through a die to produce various plastic products. Extruders can be classified into single-screw extruders and twin-screw extruders based on the number of screws. The former is typically used for basic plastic extrusion molding, while the latter is often used for advanced applications such as plastic blending, filling, and reinforcement.

[0003] The extruder's conveying channel includes a melting section and a slag removal section. The melting section is used to melt solid materials into a liquid state, while the slag removal section, in conjunction with a blower, creates a certain degree of vacuum inside the slag removal section to remove impurities from the liquid material.

[0004] Chinese Patent CN221908825U discloses a biodegradable plastic masterbatch extrusion device, which includes an extruder body and a feeding mechanism. The feeding mechanism is installed on the extruder body and includes a hopper. A rectangular frame is horizontally slidably installed on the outside of the hopper. Several first magnetic rods penetrating the hopper are arranged on one side of the inside of the rectangular frame, and second magnetic rods penetrating the hopper are arranged on opposite sides of the inside of the rectangular frame. The magnetic rods in the hopper adsorb iron-containing impurities in raw materials such as biodegradable plastic masterbatch. A dust collector is used to suck in dust and other impurities contained in the raw materials such as biodegradable plastic masterbatch through a dust collection hood, thereby achieving the removal of impurities from the raw materials and preventing impurities from affecting the produced materials.

[0005] Regarding the aforementioned technologies, in the prior art, an exhaust fan is used to evacuate air from the conveying channel of the extruder body to achieve the effect of removing impurities from the material. During the conveying process, because the impurities inside the material are relatively light, they float inside the conveying channel as the liquid material moves and tumbles with the auger inside the conveying channel. However, as shown in the attached drawings, the auger inside the extruder body is close to the inner wall of the conveying channel, so the separation distance between the impurities and the liquid material is small, which is not conducive to the separation of impurities. At the same time, the exhaust end of the exhaust fan is connected to the bottom of the conveying channel, while most of the impurities float on the top of the liquid material. Therefore, the exhaust fan is not conducive to directly extracting impurities, reducing the impurity removal effect of the extruder's impurity removal device.

[0006] Application Contents In order to improve the impurity removal effect of the extruder impurity removal device, this application provides an impurity removal device for an extruder.

[0007] This application provides a purification device for an extruder, employing the following technical solution: An extruder impurity removal device includes a frame and a conveying channel on the extruder. The conveying channel includes a melting section and an impurity removal section. The impurity removal section has a U-shaped cross-section. A dust removal mechanism is provided on the frame. The dust removal mechanism includes a filter assembly, a blower, and a washing assembly. The filter assembly, the blower, and the washing assembly are all mounted on the frame. The inlet end of the filter assembly is connected to the top of the impurity removal section. The air inlet end of the blower is connected to the filter assembly, and the air outlet end is connected to the washing assembly. The filter assembly is used to intercept material impurities, and the washing assembly is used to clean the gas.

[0008] By adopting the above technical solution, during impurity removal, the liquid material flows between the melting section and the impurity removal section. The liquid material is tumbled by the auger, causing impurities to float above it. Simultaneously, the exhaust fan is activated, ensuring that both air and impurities in the impurity removal section pass through the filtration and washing components. The filtration components intercept impurities and eliminate odors, while the washing components clean the air, achieving the desired impurity removal effect. The U-shaped cross-section of the impurity removal section increases the distance between impurities and the liquid material, facilitating the direct absorption of impurities and air from the top of the dust removal section by the dust removal mechanism. The filtration components then intercept impurities and eliminate odors from the air. Subsequently, the washing components clean the air, dissolving as many toxic substances as possible into the washing liquid. Clean air is then discharged. This not only ensures the smooth extraction of impurities from the material, improving material quality, but also reduces the possibility of impurities affecting the surrounding environment, thus enhancing the impurity removal effect of the extruder's impurity removal device.

[0009] Optionally, the filtration assembly includes a filter box, a mounting plate, and filter elements. The filter box is mounted on the frame. The mounting plate passes horizontally through the filter box and slides with the filter box. Several filter elements are arranged on the mounting plate. The filter elements are used to intercept material impurities entering the filter box. During filtration, one filter element is located inside the filter box. The filter box is provided with a drive assembly that drives the mounting plate to move.

[0010] By adopting the above technical solution, during filtration, air and impurities pass through the filter element to intercept impurities and absorb air odors. After long-term use, the old filter element is moved out of the filter box by moving the mounting plate through the drive component, and the adjacent filter element enters the filter box, achieving the effect of replacing the filter element without stopping the machine.

[0011] Optionally, the filter element includes a filter frame, a dust collection cotton bag, and an activated carbon felt. The mounting plate has several mounting steps, the filter frame is placed on the mounting steps, and the mounting plate is provided with mounting components to restrict the movement of the filter frame. The dust collection cotton bag is installed inside the filter frame, and the activated carbon felt is filled inside the dust collection cotton bag.

[0012] By adopting the above technical solution, during filtration, impurities are intercepted and adsorbed by the dust removal cotton bag, while air passes through the filter cotton bag and activated carbon felt. During this process, the activated carbon felt absorbs odors and some harmful substances in the air, keeping the air as clean as possible, thus achieving the effect of filtering impurities and air.

[0013] Optionally, the drive assembly includes a rotating shaft, a rotating gear, and a connecting rack. The rotating shaft is rotatably connected to the end of the filter box, the rotating gear is connected to the rotating shaft, and the connecting rack is connected to the end of the mounting plate and is arranged parallel to the mounting plate. The rotating gear meshes with the connecting rack, and a limiting component is provided on the rotating shaft to restrict the movement of the mounting plate.

[0014] By adopting the above technical solution, when the mounting plate is driven to move, the rotating shaft is rotated, causing the rotating gear to rotate. Through the meshing of the rotating gear and the connecting rack, the connecting rack is driven to move, thus achieving the effect of moving the mounting plate. When the filter element enters the filter box, the movement of the mounting plate is restricted by the limiting component, thus achieving the effect of controlling the mounting plate.

[0015] Optionally, the limiting component includes a plug-in post, a limiting block, a return spring, and a fixing protrusion ring. The rotating shaft has a plug-in hole, and a connecting ring is connected to the plug-in post. The plug-in post slides within the plug-in hole via the connecting ring. The return spring is sleeved on the plug-in post and located between the connecting ring and the end of the plug-in hole near the mounting plate. The limiting block is connected to one end of the plug-in post. A limiting hole is provided at the end of the mounting plate corresponding to the position of the filter element. The fixing protrusion ring is connected to the inner wall of the limiting hole. The limiting block has a limiting ring groove to accommodate the fixing protrusion ring. When the mounting plate is limited, the limiting block is embedded in the limiting hole, the fixing protrusion ring is located in the limiting ring groove, and the return spring is compressed.

[0016] By adopting the above technical solution, when the mounting plate is restricted, pressing the plug pin causes the restricting block to move and insert into the plug hole, fixing the convex ring and embedding it in the restricting ring groove. At this time, the return spring is compressed to restrict the degree of freedom of the mounting plate, thus achieving the effect of restricting the movement of the mounting plate.

[0017] Optionally, the installation assembly includes a fixed plate, a rotating ring, a lifting column, a limiting block, a pressure block, and a fixing block. The installation plate has a lifting hole, and the fixed plate is connected to the lifting hole. The lifting column is vertically inserted through the fixed plate, and the limiting block is connected to the fixed plate. The lifting column has a limiting groove, and the limiting block is slidably fitted in the limiting groove. The rotating ring is rotatably connected to the fixed plate and threadedly engaged with the lifting column. The pressure block is installed on the lifting column, and the installation plate has a lifting groove. The fixing block is connected to the filter frame, and both the pressure block and the fixing block are located in the lifting groove. During installation, the pressure block applies pressure to the fixing block.

[0018] By adopting the above technical solution, when installing the filter frame, the filter frame is placed on the installation step, the fixing block enters the lifting groove, and then the rotating ring is rotated. Through the cooperation of the limiting block and the limiting groove, the lifting column is lowered, which drives the pressure block to lower, thereby applying pressure to the fixing block, thus restricting the degree of freedom of the filter frame and realizing the installation of the filter frame.

[0019] Optionally, a guide plate is connected inside the lifting groove. The guide plate is inclined, with the reference direction being from the bottom wall to the top wall of the lifting groove. The distance between the guide plate and the lifting column gradually decreases. A connecting rod is horizontally connected to the lifting column. An avoidance groove is opened on the guide plate at the position corresponding to the connecting rod. The connecting rod is a rectangular rod, and a sliding cylinder is sleeved on the connecting rod. The end of the sliding cylinder is slidably engaged with the guide plate. The pressure block is connected to the sliding cylinder. The pressure block is provided with a pressure-applying inclined surface, and the fixing block is provided with a contacting inclined surface. During installation, the pressure-applying inclined surface is in contact with the contacting inclined surface. A driving component for driving the rotating ring to rotate is provided on the mounting plate.

[0020] By adopting the above technical solution, through the cooperation of the guide plate and the sliding cylinder, when the lifting column is raised and lowered, the sliding cylinder moves horizontally. The rotating ring is driven to rotate by the driving component, causing the lifting column to descend. The sliding cylinder moves horizontally, causing the pressure block to descend and move. Finally, the pressure slope is pressed against the inclined surface to restrict the degree of freedom of the filter frame. When released, the movement path of the pressure block is satisfied to detach from the fixed block, thus achieving the effect of filter frame installation.

[0021] Optionally, the driving component includes a rotating part and a plug-in part. The rotating part is connected to the top end of the plug-in part. The plug-in part is a rectangular tube. The rotating ring is provided with a plug-in groove. When driving, the plug-in part is plugged into the rotating ring.

[0022] By adopting the above technical solution, when driving the rotating ring to rotate, the plug part is inserted into the plug slot, and the rotating part can drive the rotating ring to rotate. After the filter frame is installed, the driving component is taken out.

[0023] Optionally, the washing assembly includes a washing tank located below the frame, with an exhaust pipe and a liquid replenishment pipe on the washing tank. The washing tank is filled with washing liquid, and the exhaust end of the exhaust fan passes through the top of the washing tank and is submerged in the washing liquid.

[0024] By adopting the above technical solution, when washing the air, the air enters the washing liquid and rises in the form of bubbles. During this process, as many toxic substances in the air as possible come into contact with the washing liquid. Finally, the air is discharged from the washing tank, thus achieving the effect of washing the air.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. During the impurity removal process, the liquid material flows between the melting section and the impurity removal section. The liquid material is tumbled by the auger, causing impurities to float above it. Simultaneously, the exhaust fan is activated, forcing both air and impurities from the impurity removal section through a filtration and washing assembly. The filtration assembly intercepts impurities and eliminates odors, while the washing assembly cleans the air, achieving the desired impurity removal effect. The impurity removal section has a U-shaped cross-section to increase the distance between impurities and the liquid material, facilitating the direct absorption of impurities and air from the top of the dust removal section by the dust removal mechanism. The filtration assembly then intercepts impurities and eliminates odors from the air. Subsequently, the washing assembly cleans the air, dissolving as many toxic substances as possible into the washing liquid. Clean air is then discharged. This process not only ensures the smooth extraction of impurities from the material, improving material quality, but also reduces the possibility of impurities affecting the surrounding environment, thus enhancing the impurity removal efficiency of the extruder's impurity removal device. 2. When restricting the mounting plate, press the plug to move the restricting block and insert it into the plug hole, fix the convex ring, and embed it in the restricting ring groove. At this time, the return spring is compressed to restrict the degree of freedom of the mounting plate, thus achieving the effect of restricting the movement of the mounting plate. 3. When installing the filter frame, place the filter frame on the installation step, and let the fixing block enter the lifting groove. Then rotate the rotating ring. Through the cooperation of the limiting block and the limiting groove, the lifting column will descend, which will drive the pressure block to descend and apply pressure to the fixing block. This restricts the freedom of the filter frame and realizes the installation of the filter frame. 4. Through the cooperation of the guide plate and the sliding cylinder, when the lifting column is raised and lowered, the sliding cylinder moves horizontally. The driving component drives the rotating ring to rotate, causing the lifting column to descend. The sliding cylinder moves horizontally, causing the pressure block to descend and move. Finally, it presses the pressure slope against the inclined surface to restrict the freedom of the filter frame. When released, it satisfies the movement path of the pressure block to detach from the fixed block, thus achieving the effect of filter frame installation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the impurity removal device for the extruder in the embodiments of this application.

[0027] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the structure of the impurity removal device.

[0028] Figure 3 This is a cross-sectional view used to illustrate the structure of the filter element in the embodiments of this application.

[0029] Figure 4 This is an exploded view used in the embodiments of this application to illustrate the structure of the installation components.

[0030] Figure 5 This is a cross-sectional view used in the embodiments of this application to illustrate the structure of the filtering component, the mounting component, the driving component, and the limiting component.

[0031] Figure 6 This is a schematic diagram of the structure of the driving component and the filtering component in the embodiments of this application.

[0032] Figure 7 This is an exploded view used in the embodiments of this application to illustrate the structure of the driving element, driving component, and limiting component.

[0033] Explanation of reference numerals in the attached drawings: 01, frame; 02, conveying channel; 021, melting section; 022, impurity removal section; 3, dust removal mechanism; 31, filter assembly; 311, filter box; 312, mounting plate; 3121, lifting hole; 3122, lifting groove; 3123, guide plate; 3124, limiting hole; 313, filter element; 3131, filter frame; 3132, dust removal cotton bag; 3133, activated carbon felt; 32, exhaust fan; 33, washing assembly; 331, washing... 4. Box; 41. Mounting assembly; 42. Fixing plate; 43. Rotating ring; 44. Lifting column; 45. Limiting groove; 46. Connecting rod; 47. Limiting block; 48. Pressing block; 49. Sliding cylinder; 40. Fixing block; 51. Driving component; 52. Rotating part; 6. Insertion part; 71. Driving assembly; 62. Rotating shaft; 63. Rotating gear; 74. Connecting rack; 75. Limiting assembly; 76. Insertion column; 77. Limiting round block; 78. Return spring; 79. Fixing convex ring. Detailed Implementation

[0034] The following is combined with Figures 1-7 This application will be described in further detail.

[0035] This application discloses a waste removal device for an extruder. (Refer to...) Figure 1 and Figure 2 The impurity removal device for the extruder includes a frame 01 and a conveying channel 02 on the extruder. The conveying channel 02 is mounted on the frame 01 and includes a melting section 021 and an impurity removal section 022. The melting section 021 and the impurity removal section 022 are fixedly connected and communicate with each other. The cross-section of the impurity removal section 022 is U-shaped.

[0036] Reference Figure 1 and Figure 2 A dust removal mechanism 3 is installed on the frame 01. The dust removal mechanism 3 includes a filter assembly 31, an exhaust fan 32, and a washing assembly 33. The filter assembly 31 includes a filter box 311, a mounting plate 312, and filter elements 313. The filter box 311 is installed on the frame 01 and is hollow. Several vent pipes are fixedly connected to the top of the filter box 311, and the vent pipes connect to the inner top wall of the impurity removal section 022. The mounting plate 312 passes horizontally through the filter box 311 and slides with the filter box 311. The mounting plate 312 moves along the width direction of the filter box 311. Several mounting steps are opened on the mounting plate 312. This embodiment uses two as an example.

[0037] Reference Figure 2 and Figure 3 The filter element 313 includes a filter frame 3131, a dust collection bag 3132, and an activated carbon felt 3133. The filter frame 3131 is placed within the mounting step and is flush with the surface of the mounting plate 312. The dust collection bag 3132 is installed inside the filter frame 3131, and the activated carbon felt 3133 is filled inside the filter bag.

[0038] Reference Figure 4 and Figure 5 The mounting plate 312 is equipped with a mounting assembly 4, which includes a fixed plate 41, a rotating ring 42, a lifting column 43, a limiting block 44, a pressure block 45, and a fixing block 46. The mounting plate 312 has a lifting hole 3121 and a lifting groove 3122 at positions corresponding to the filter frame 3131, and the lifting hole 3121 communicates with the lifting groove 3122. The fixed plate 41 is fixedly connected to the lifting hole 3121. The lifting column 43 is vertically inserted through the fixed plate 41. The limiting block 44 is fixedly connected to the fixed plate 41. The lifting column 43 has a vertically formed limiting groove 431, and the limiting block 44 slides within the limiting groove 431. The rotating ring 42 is rotatably connected to the fixed plate 41 and threadedly engaged with the lifting column 43.

[0039] Reference Figure 4 and Figure 5A connecting rod 432 is horizontally fixedly connected to the lifting column 43. The connecting rod 432 is a rectangular rod and is located within the lifting groove 3122. A guide plate 3123 is fixedly connected within the lifting groove 3122. The guide plate 3123 is inclined, with the reference direction from bottom to top. The distance between the guide plate 3123 and the lifting column 43 gradually decreases. A clearance groove is provided on the guide plate 3123 at the position corresponding to the connecting rod 432. A sliding cylinder 451 is sleeved on the connecting rod 432. A T-shaped strip is fixedly connected to one end of the sliding cylinder 451, and the other end of the sliding cylinder 451 slides in cooperation with the guide plate 3123 through the T-shaped strip. A pressure block 45 is fixedly connected to the other end of the sliding cylinder 451, and a pressure slope is provided on the pressure block 45. A fixing block 46 is fixedly connected to the end of the filter frame 3131 and is located within the lifting groove 3122. A contact slope is provided on the fixing block 46.

[0040] Reference Figure 4 , Figure 6 and Figure 7 A driving component 5 is provided on the rotating ring 42. The driving component 5 includes a rotating part 51 and a plug-in part 52. The plug-in part 52 is a rectangular tube, and the rotating part 51 is fixedly connected to the top end of the plug-in part 52. The rotating ring 42 has a plug-in groove that engages with the plug-in part 52.

[0041] During installation, the filter frame 3131 is placed on the installation step, and then the plug part 52 is inserted into the plug slot. The rotating part 51 is rotated to make the rotating ring 42 rotate, the lifting column 43 descends, the connecting rod 432 descends, the sliding cylinder 451 descends and moves horizontally, driving the pressure block 45 to move until the pressure slope presses against the slope to restrict the degree of freedom of the filter frame 3131, thus realizing the installation of the filter element 313. After the installation is completed, the driving part 5 is removed.

[0042] Reference Figure 5 and Figure 6 A drive assembly 6 is provided on the filter box 311. The drive assembly 6 includes a rotating shaft 61, a rotating gear 62, and a connecting rack 63. The rotating shaft 61 is rotatably connected to the end of the filter box 311, and the rotating gear 62 is fixedly connected to the rotating shaft 61. The connecting rack 63 is fixedly connected to the end of the mounting plate 312 and is parallel to the mounting plate 312. The rotating gear 62 meshes with the connecting rack 63.

[0043] Reference Figure 5 and Figure 7A limiting component 7 is provided on the rotating shaft 61. The limiting component 7 includes a plug-in post 71, a limiting block 72, a return spring 73, and a fixing protruding ring 74. The rotating shaft 61 has a plug-in hole, with retaining rings fixedly connected to both ends of the plug-in hole. A connecting ring is fixedly connected to the plug-in post 71, and the plug-in post 71 slides within the plug-in hole via the connecting ring. The return spring 73 is sleeved on the plug-in post 71 and is located between the connecting ring and the retaining ring near the mounting plate 312. The limiting block 72 is fixedly connected to one end of the plug-in post 71, and a limiting ring groove is formed on the limiting block 72. A limiting hole 3124 is formed at the end of the mounting plate 312 corresponding to the position of the filter element 313, and the fixing protruding ring 74 is fixedly connected to the inner wall of the limiting hole 3124.

[0044] When replacing filter element 313, rotate the rotating shaft 61 to make the rotating gear 62 rotate. This drives the mounting plate 312 to move through the connecting rack 63 until the limiting hole 3124 aligns with the rotating shaft 61. At this time, the filter element 313 to be replaced is located outside the filter box 311, and the adjacent filter element 313 enters the filter box 311. Press the plug-in post 71 to make the limiting block 72 move and enter the limiting hole 3124. The fixing convex ring 74 deforms and enters the limiting ring groove. The return spring 73 is compressed, thereby limiting the degree of freedom of the mounting plate 312 and achieving the effect of replacing filter element 313 without stopping the machine.

[0045] Reference Figure 1 and Figure 2 The washing assembly 33 includes a washing tank 331, which is installed below the frame 01. The washing tank 331 is equipped with an exhaust pipe and a liquid replenishment pipe, and is filled with washing liquid, which is water in this embodiment. Several exhaust fans 32 are installed on the washing tank 331. The air inlet of the exhaust fan 32 is connected to the bottom wall of the filter box 311, and the air outlet passes through the washing tank 331 and extends to a position near the bottom wall of the washing tank 331, where the air outlet is submerged in the washing liquid. Two extension plates are horizontally fixedly connected inside the washing tank 331, and the two extension plates are staggered. The air outlet of the exhaust fan 32 passes through the extension plates.

[0046] The implementation principle of the impurity removal device for an extruder according to an embodiment of this application is as follows: During filtration, impurities and air in the liquid material conveyed by the auger are separated above the liquid material. The exhaust fan 32 is started to create a negative pressure inside the filter box 311 to absorb impurities and air. The impurities are intercepted by the dust removal cotton bag 3132, and the air is absorbed by the activated carbon felt 3133 to absorb toxic substances and odors. Subsequently, the air is discharged into the washing liquid and rises in the form of bubbles. The bubbles move along the extension plate to wash the air. Finally, the air is discharged through the exhaust pipe, thus achieving the effect of removing impurities from the liquid material and filtering impurities and air.

[0047] When replacing filter element 313, rotate the rotating shaft 61 to move the mounting plate 312 until the adjacent limiting hole 3124 is aligned with the rotating shaft 61. Apply pressure to the insertion post 71 to insert the limiting block 72 into the limiting hole 3124. The fixing protrusion ring 74 is located in the limiting ring groove. At this time, the original filter element 313 has been moved out of the filter box 311, and the adjacent filter element 313 enters the filter box 311. Insert the driving component 5 into the rotating ring 42 and rotate it in the opposite direction to raise the lifting column 43. The sliding cylinder 451 rises and moves horizontally, driving the pressure block 45 to move until the pressure block 45 is disengaged from the rising path of the fixing block 46. Then the filter element 313 can be removed. This achieves the effect of removing and replacing the filter element 313 without stopping the exhaust fan 32.

[0048] The cross-section of the impurity removal section 022 is U-shaped to increase the distance between impurities and liquid materials. This facilitates the direct absorption of impurities and air from the top of the dust removal section by the dust removal mechanism 3. The filter assembly 31 then intercepts the impurities and eliminates odors in the air. Subsequently, the washing assembly 33 cleans the air, dissolving as many toxic substances in the air as possible into the washing liquid. Clean air is then discharged. This not only allows impurities in the material to be extracted smoothly, improving the quality of the material, but also reduces the possibility of material impurities affecting the surrounding environment, thus improving the impurity removal effect of the extruder's impurity removal device.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An impurity removal device for an extruder, comprising a frame (01) and a conveying channel (02) on the extruder, wherein the conveying channel (02) comprises a melting section (021) and an impurity removal section (022), characterized in that: The cross section of the impurity removal part (022) is U-shaped. The frame (01) is provided with a dust removal mechanism (3). The dust removal mechanism (3) comprises a filter assembly (31), an exhaust fan (32) and a washing assembly (33). The filter assembly (31), the exhaust fan (32) and the washing assembly (33) are all installed on the frame (01). The inlet end of the filter assembly (31) is connected to the top of the impurity removal part (022). The air inlet end of the exhaust fan (32) is connected to the filter assembly (31), and the air outlet end is connected to the washing assembly (33). The filter assembly (31) is used to intercept material impurities, and the washing assembly (33) is used to clean gas.

2. The impurity removal device for an extruder according to claim 1, characterized in that: The filter assembly (31) comprises a filter box (311), a mounting plate (312) and a filter element (313); the filter box (311) is mounted on the frame (01); the mounting plate (312) passes through the filter box (311) horizontally and is slidably matched with the filter box (311); a plurality of filter elements (313) are arranged on the mounting plate (312); the filter elements (313) are used to intercept material impurities entering the filter box (311); during filtering, one filter element (313) is located in the filter box (311); and a driving assembly (6) for driving the mounting plate (312) to move is arranged on the filter box (311).

3. The impurity removal device for an extruder according to claim 2, characterized in that: The filter element (313) comprises a filter frame (3131), a dust removal cotton bag (3132) and an activated carbon felt (3133); a plurality of installation steps are provided on the installation plate (312); the filter frame (3131) is placed on the installation steps; a mounting assembly (4) for limiting the movement of the filter frame (3131) is provided on the installation plate (312); the dust removal cotton bag (3132) is installed in the filter frame (3131); and the activated carbon felt (3133) is filled in the dust removal cotton bag (3132).

4. The impurity removal device for an extruder according to claim 2, characterized in that: The driving assembly (6) comprises a rotating shaft (61), a rotating gear (62) and a connecting rack (63); the rotating shaft (61) is rotatably connected to the end of the filter box (311); the rotating gear (62) is connected to the rotating shaft (61); the connecting rack (63) is connected to the end of the mounting plate (312) and is arranged parallel to the mounting plate (312); the rotating gear (62) is meshed with the connecting rack (63); and a limiting assembly (7) for limiting the movement of the mounting plate (312) is arranged on the rotating shaft (61).

5. The impurity removal device for an extruder according to claim 4, characterized in that: The limiting assembly (7) comprises a plug-in column (71), a limiting round block (72), a return spring (73) and a fixed convex ring (74); a plug-in hole is formed in the rotating shaft (61); a connecting ring is connected to the plug-in column (71); the plug-in column (71) is slidably fitted in the plug-in hole through the connecting ring; the return spring (73) is sleeved on the plug-in column (71) and is located between the connecting ring and the end of the plug-in hole close to the mounting plate (312); the limiting round block (72) is connected to the plug-in column ( The filter element (313) is provided at one end of the mounting plate (312), a limiting hole (3124) is provided at the end of the mounting plate (312) corresponding to the position of the filter element (313), the fixing convex ring (74) is connected to the inner wall of the limiting hole (3124), and a limiting ring groove for accommodating the fixing convex ring (74) is provided on the limiting block (72). When the mounting plate (312) is limited, the limiting block (72) is embedded in the limiting hole (3124), the fixing convex ring (74) is located in the limiting ring groove, and the return spring (73) is compressed.

6. The impurity removal device for an extruder according to claim 3, characterized in that: The mounting assembly (4) comprises a fixing plate (41), a rotating ring (42), a lifting column (43), a limiting block (44), a pressing block (45) and a fixing block (46); a lifting hole (3121) is provided on the mounting plate (312); the fixing plate (41) is connected to the lifting hole (3121); the lifting column (43) is vertically inserted into the fixing plate (41); the limiting block (44) is connected to the fixing plate (41); a limiting groove (431) is provided on the lifting column (43); the limiting block (44) is slidably connected to the fixing plate (41); The rotating ring (42) is rotatably connected to the fixing plate (41) and threadably matched with the lifting column (43). The pressing block (45) is installed on the lifting column (43). A lifting groove (3122) is provided on the mounting plate (312). The fixing block (46) is connected to the filter frame (3131). Both the pressing block (45) and the fixing block (46) are located in the lifting groove (3122). When installing, the pressing block (45) applies pressure to the fixing block (46).

7. The impurity removal device for an extruder according to claim 6, characterized in that: A guide plate (3123) is connected inside the lifting groove (3122). The guide plate (3123) is tilted. From the bottom wall to the top wall of the lifting groove (3122) as a reference direction, the distance between the guide plate (3123) and the lifting column (43) gradually decreases. A connecting rod (432) is horizontally connected to the lifting column (43). An avoidance groove is provided at a position corresponding to the connecting rod (432) on the guide plate (3123). The connecting rod (432) is a rectangular shaped rod, a sliding cylinder (451) is sleeved on the connecting rod (432), an end of the sliding cylinder (451) is slidably matched with the guide plate (3123), the pressing block (45) is connected to the sliding cylinder (451), a pressing inclined surface is provided on the pressing block (45), and a resisting inclined surface is provided on the fixing block (46). When installed, the pressing inclined surface is in contact with the resisting inclined surface, and a driving member (5) for driving the rotating ring (42) to rotate is provided on the mounting plate (312).

8. The impurity removal device for an extruder according to claim 7, characterized in that: The driving member (5) comprises a rotating part (51) and an inserting part (52); the rotating part (51) is connected to the top end of the inserting part (52); the inserting part (52) is a rectangular tube; a plugging groove is provided on the rotating ring (42); when driving, the plugging part (52) is plugged into and fitted on the rotating ring (42).

9. The impurity removal device for an extruder according to claim 1, characterized in that: The washing assembly (33) comprises a washing box (331), the washing box (331) being arranged below the frame (01), the washing box (331) being provided with an exhaust pipe and a liquid replenishing pipe, the washing box (331) being filled with washing liquid, and the air outlet end of the exhaust fan (32) passing through the top of the washing box (331) and being immersed in the washing liquid.

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