Filtering device of plastic extruder

Abstract

The utility model relates to the technical field of filter devices, and discloses a filter device of a plastic extruder, which comprises a filter box, a filter screen is fixed in the filter box, a feed pipe is fixed on the rear side of the filter box in a penetrating manner, a treatment assembly is arranged in the filter box, and the treatment assembly comprises a treatment frame inserted on the front side of the filter box in a sliding manner; a scraper is arranged below the treatment frame, and the bottom face of the scraper abuts against the top face of the filter screen. According to the plastic slurry filtering device, plastic slurry in filtering can be stirred through rotation of the stirring blades, the viscosity of the plastic slurry is reduced, the filtering speed is increased, large-particle impurities filtered from the filtering net can be cleaned to the edge of the filtering net through the scraping plate when the plastic slurry is filtered, the filtering net is prevented from being blocked, and the filtering efficiency is improved. Meanwhile, impurities scraped off after filtration are discharged out of the filter screen along with the movement of the scraper, so that the filtering speed of the plastic slurry is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a filtering device for a plastic extruder. Background Art

[0002] Plastic is a special polymer compound made by mixing resin and various stabilizers, pigments, and adhesives. Before injection molding or cutting into particles, the slurry needs to have certain flow properties so that it can be discharged from the outside of the device through the pump body, screw rod, etc. In this process, it is inevitable that there will be uneven mixing and large particles in the plastic slurry. If it cannot be screened and crushed multiple times, the surface of the product will be rough and not smooth, and the processing quality cannot be guaranteed. Therefore, a filtering device is required for filtering.

[0003] An existing filter device for a plastic extruder (Announcement No.: CN221756582U) has at least the following drawbacks: in actual use, when the filter screen filters plastic slurry and causes impurities to accumulate on the filter screen, the impurities above the filter screen cannot be cleaned, resulting in a certain degree of blockage in the filter screen, thereby affecting the filtration efficiency. For this reason, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a filtering device for a plastic extruder.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A filtering device for a plastic extruder comprises a filter box, a filter screen is fixed inside the filter box, a feed pipe is fixed through the rear side of the filter box, a processing component is arranged inside the filter box, the processing component comprises a processing frame slidably inserted on the front side of the filter box, a scraper is arranged below the processing frame, the bottom surface of the scraper abuts the top surface of the filter screen, a stirring blade is rotatably connected to the top surface of the inner top surface of the filter box, the height of the scraper is less than the gap between the stirring blade and the filter screen, and oblique bars are fixed on the front and back sides of the filter screen.

[0007] As a further solution of the present invention, two rebound strips are fixed on the rear side of the processing frame, a rebound tube is slidably inserted into the outer wall of the rebound strip, the scraper is fixed to the bottom surface of the rebound tube, three springs are fixed between the bottom end of the rebound strip and the inner bottom surface of the rebound tube, a rack is fixed on one side of the interior of the processing frame, a gear is fixed on the outer wall of the stirring blade, and the gear is engaged with one side of the rack.

[0008] As a further solution of the present invention, two fixed plates are fixed on the top surface of the filter box, a screw rod is rotatably connected between the two fixed plates, a motor is fixed to the rear side of the fixed plate near the rear side of the filter box, the output shaft end of the motor is fixed to the rear end of the screw rod, and the processing frame is threadedly connected to the outer wall of the screw rod.

[0009] As a further solution of the present invention, three support rods are fixed to the inner bottom surface of the rebound cylinder, the support rods and the bottom ends of the rebound strips are slidably inserted, and the springs are movably sleeved on the outer walls of the support rods.

[0010] As a further solution of the present invention, isolation plates are fixed to the bottom surface of the filter screen near the front and rear sides, the bottom surface of the isolation plates is fixed to the inner bottom surface of the filter box, and processing ports are opened on the left and right sides of the filter box. The inside of the processing port is connected to a sealing cover through a hinge, and the sealing cover is locked to the filter box through a buckle.

[0011] As a further solution of the present invention, the bottom surface of the filter box is connected to and fixed with a collecting hopper, and the bottom surface of the collecting hopper is connected to and fixed with a discharge valve.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting up a processing rack, when the filter screen filters the plastic slurry, the reciprocating movement of the processing rack drives the stirring blade to rotate forward and reverse and the scraper to repeatedly scrape the filter screen. The rotation of the stirring blade can stir the plastic slurry being filtered, reduce the viscosity of the plastic slurry, and increase the filtration speed. The scraper can clean the large particles of impurities filtered out of the filter screen to the edge of the filter screen when the plastic slurry is filtered, thereby preventing the filter screen from being blocked. At the same time, the impurities scraped off after filtration are discharged from the filter screen as the scraper moves, thereby increasing the filtration speed of the plastic slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of a filtering device for a plastic extruder proposed by the present invention;

[0015] Figure 2 This is a schematic diagram of a three-dimensional cross-sectional structure of a filter screen of a filter device of a plastic extruder proposed by the present invention;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of a processing frame of a filter device for a plastic extruder proposed by the present invention;

[0017] Figure 4 for Figure 3 A magnified schematic diagram of the local structure of Figure A.

[0018] In the figure: 1. Filter box; 101. Filter screen; 102. Feed pipe; 2. Processing rack; 201. Scraper; 202. Stirring blade; 203. Rebound bar; 204. Rebound cylinder; 205. Spring; 206. Rack; 207. Gear; 208. Bevel bar; 209. Fixed plate; 210. Screw rod; 211. Motor; 3. Support rod; 4. Isolation plate; 401. Processing port; 402. Sealing cover; 5. Collection hopper; 501. Discharge valve. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] like Figures 1-4 As shown, a filtering device for a plastic extruder includes a filter box 1, a filter screen 101 is fixed inside the filter box 1, a feed pipe 102 is fixed through the rear side of the filter box 1, a processing component is provided inside the filter box 1, the processing component includes a processing rack 2 slidably inserted on the front side of the filter box 1, a scraper 201 is provided below the processing rack 2, the bottom surface of the scraper 201 abuts against the top surface of the filter screen 101, a stirring blade 202 is rotatably connected to the top surface of the inner top surface of the filter box 1, the height of the scraper 201 is less than the gap between the stirring blade 202 and the filter screen 101, and oblique bars 208 are fixed on the front and back sides of the filter screen 101.

[0023] like Figure 2-Figure 4As shown, in this embodiment, two rebound strips 203 are fixed to the rear side of the processing rack 2, and a rebound cylinder 204 is slidably inserted into the outer wall of the rebound strip 203, the scraper 201 is fixed to the bottom surface of the rebound cylinder 204, and three springs 205 are fixed between the bottom end of the rebound strip 203 and the inner bottom surface of the rebound cylinder 204. A rack 206 is fixed to one side of the interior of the processing rack 2, and a gear 207 is fixed to the outer wall of the stirring blade 202. The gear 207 is meshed with one side of the rack 206, and the plastic slurry is input into the interior of the filter box 1 through the feed pipe 102, and then the processing rack 2 is driven to drive the scraper 201 to move horizontally on the top surface of the filter screen 101 and scrape the top surface of the filter screen 101, scraping the large particles of impurities on the filter screen 101 to the edge of the filter screen 101, thereby preventing the filter screen 101 from being blocked during filtration and reducing the filtration efficiency. When the plastic slurry is completed After the liquid is filtered, the scraper 201 is driven to move onto the inclined bar 208, and the scraper 201 moves upward along the inclined surface of the inclined bar 208, thereby driving the rebound bar 203 to slide inside the rebound cylinder 204, thereby compressing the spring 205 until the scraper 201 moves to the edge of the inclined bar 208, pushing the accumulated impurities into the gap between the isolation plate 4 and the filter box 1, thereby discharging the impurities. When the scraper 201 moves onto the filter screen 101 again, the spring 205 rebounds and makes the scraper 201 fit the top surface of the filter screen 101 again. At the same time, during the reciprocating movement of the processing rack 2, the rack 206 will be synchronously driven to move back and forth. Under the meshing action of the gear 207 and one side of the rack 206, the stirring blade 202 is driven to rotate, so that the stirring blade 202 stirs the plastic slurry, reduces the viscosity of the plastic slurry, and increases the filtration speed.

[0024] like Figure 2-Figure 4 As shown, in this embodiment, two fixed plates 209 are fixed to the top surface of the filter box 1, and a screw rod 210 is rotatably connected between the two fixed plates 209. A motor 211 is fixed to the rear side of the fixed plate 209 near the rear side of the filter box 1, and the output shaft end of the motor 211 is fixed to the rear end of the screw rod 210. The processing frame 2 is threadedly connected to the outer wall of the screw rod 210. By starting the motor 211, the screw rod 210 is driven to rotate forward and backward. Under the action of the threaded connection between the processing frame 2 and the outer wall of the screw rod 210, the processing frame 2 drives the scraper 201 to move horizontally on the top surface of the filter screen 101 and scrape the top surface of the filter screen 101, while driving the stirring blade 202 to rotate.

[0025] like Figure 2-Figure 4 As shown, in this embodiment, three support rods 3 are fixed to the inner bottom surface of the rebound cylinder 204, the support rods 3 and the bottom end of the rebound strip 203 are slidably inserted, and the springs 205 and the outer walls of the support rods 3 are movably sleeved. By sliding the support rods 3 and the bottom end of the rebound strip 203, the springs 205 and the outer walls of the support rods 3 are movably sleeved, thereby supporting the springs 205 and preventing the springs 205 from being deformed during compression and rebound.

[0026] like Figure 2-Figure 4 As shown, in this embodiment, isolation plates 4 are fixed to the bottom surface of the filter screen 101 near the front and rear sides, and the bottom surface of the isolation plate 4 is fixed to the inner bottom surface of the filter box 1. Processing ports 401 are opened on the left and right sides of the filter box 1. The interior of the processing port 401 is connected to a sealing cover 402 through a hinge, and the sealing cover 402 is locked to the filter box 1 through a buckle. By opening the sealing cover 402, impurities accumulated between the isolation plate 4 and the filter screen 101 can be centrally processed.

[0027] like Figure 2-Figure 4 As shown, in this embodiment, the bottom surface of the filter box 1 is connected to and fixed with a collecting hopper 5, and the bottom surface of the collecting hopper 5 is connected to and fixed with a discharge valve 501. The filtered plastic slurry can be collected through the collecting hopper 5, and the plastic slurry can be taken out by opening the discharge valve 501.

[0028] The filter 101 is then moved to the left of the filter 102 and the filter 102 is moved to the right of the filter 102. The filter 101 is moved to the right of the filter 102 and the filter 102 is moved to the right of the filter 102. When the scraper 201 moves onto the filter screen 101 again, the spring 205 rebounds and makes the scraper 201 fit with the top surface of the filter screen 101 again. At the same time, during the reciprocating movement of the processing frame 2, the rack 206 will be synchronously driven to move back and forth. Under the meshing action of the gear 207 and the rack 206, the stirring blade 202 is driven to rotate, so that the stirring blade 202 stirs the plastic slurry, reduces the viscosity of the plastic slurry, and increases the filtration speed. The support rod 3 and the bottom end of the rebound bar 203 are slidably inserted, and the spring 205 is movably sleeved on the outer wall of the support rod 3, thereby supporting the spring 205 and preventing the spring 205 from being deformed during compression and rebound. By opening the sealing cover 402, the impurities accumulated between the isolation plate 4 and the filter screen 101 can be centrally processed, and the filtered plastic slurry can be concentrated and collected through the collecting hopper 5. The plastic slurry can be taken out by opening the discharge valve 501.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A filter device for a plastic extruder, comprising a filter box (1), characterized in that: A filter screen (101) is fixed inside the filter box (1), a feed pipe (102) is fixed through the rear side of the filter box (1), a processing assembly is provided inside the filter box (1), and the processing assembly includes a processing frame (2) slidably inserted in the front side of the filter box (1), a scraper (201) is provided below the processing frame (2), the bottom surface of the scraper (201) is in contact with the top surface of the filter screen (101), and a stirring blade (202) is rotatably connected to the top surface of the inner part of the filter box (1), the height of the scraper (201) is less than the gap between the stirring blade (202) and the filter screen (101), and oblique bars (208) are fixed on both the front and rear sides of the filter screen (101).

2. A filter device for a plastic extruder according to claim 1, characterized in that: Two rebound strips (203) are fixed to the rear side of the processing frame (2), a rebound cylinder (204) is slidably inserted into the outer wall of the rebound strip (203), the scraper (201) is fixed to the bottom surface of the rebound cylinder (204), three springs (205) are fixed between the bottom end of the rebound strip (203) and the inner bottom surface of the rebound cylinder (204), a rack (206) is fixed to one side of the inner side of the processing frame (2), a gear (207) is fixed to the outer wall of the stirring blade (202), and the gear (207) is meshed with one side of the rack (206).

3. A filter device for a plastic extruder according to claim 2, characterized in that: Two fixing plates (209) are fixed to the top surface of the filter box (1), a screw rod (210) is rotatably connected between the two fixing plates (209), a motor (211) is fixed to the rear side of the fixing plate (209) near the rear side of the filter box (1), an output shaft end of the motor (211) is fixed to the rear end of the screw rod (210), and the processing frame (2) is threadedly connected to the outer wall of the screw rod (210).

4. A filter device for a plastic extruder according to claim 3, characterized in that: Three support rods (3) are fixed to the inner bottom surface of the rebound cylinder (204), the support rods (3) and the bottom ends of the rebound strips (203) are slidably inserted, and the springs (205) are movably sleeved on the outer walls of the support rods (3).

5. A filter device for a plastic extruder according to claim 4, characterized in that: Isolation plates (4) are fixed to the bottom surface of the filter screen (101) near the front and rear sides, and the bottom surface of the isolation plates (4) is fixed to the inner bottom surface of the filter box (1). The left and right sides of the filter box (1) are provided with processing ports (401). The inside of the processing port (401) is connected to a sealing cover (402) via a hinge, and the sealing cover (402) is locked to the filter box (1) via a buckle.

6. A filter device for a plastic extruder according to claim 5, characterized in that: The bottom surface of the filter box (1) is connected to and fixed with a collecting hopper (5), and the bottom surface of the collecting hopper (5) is connected to and fixed with a discharge valve (501).

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