Volumetric feeding device with anti-blocking structure for double-screw extruder

Abstract

The utility model discloses a positive displacement feeding device with an anti-blocking structure for a twin-screw extruder, which comprises a fixed bottom plate, the three side edges of the top surface of the fixed bottom plate are fixedly connected with support vertical plates, the end parts of the side surfaces of the three support vertical plates are fixedly connected with support connecting rods, and the support connecting rods are fixedly connected with the fixed bottom plate. A screen roller is fixedly connected among the three supporting connecting rods, one end of the screen roller is fixedly connected with a fixing disc, one side of the fixing disc is fixedly connected with a first discharging assembly, the top face of the other end of the screen roller is connected with a feeding port in a communicating mode, and the other side of the fixing disc is fixedly connected with a material guiding assembly. A feeding assembly is fixedly connected to the middle of the top face of the fixed bottom plate, a rectangular hole is formed in the middle of the fixed bottom plate, material particles can be screened and discharged at the same time, the overall size of the material particles is uniform, the machining quality is guaranteed, the machining process is optimized, the screened materials do not need to be manually cleaned, and the machining efficiency is improved. The labor intensity is reduced, and the processing stability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of volumetric feeding device for twin-screw extruders with anti-clogging structure, specifically a volumetric feeding device for twin-screw extruders with anti-clogging structure. Background Technology

[0002] Twin-screw extruders are developed from single-screw extruders and are used for extruded product molding. In order to improve the processing efficiency and production automation efficiency of twin-screw extruders, a feeding mechanism is used to continuously supply material to the twin-screw extruder. The feeding mechanism mainly consists of three parts: feeding system, hopper, and feeder.

[0003] For example, the anti-clogging servo feeding mechanism for a twin-screw extruder disclosed in patent announcement number CN222079870U includes a mixing box, a hopper installed at the top of the mixing box, a protective cover installed at the bottom of the mixing box, a servo motor installed inside the protective cover, a spiral agitator installed on the output shaft of the servo motor, an opening at the front end of the mixing box, a receiving plate installed at the bottom of the opening, brackets installed on both sides of the mixing box, a first bearing and a second bearing installed at the top of the brackets, a rotating rod installed inside the first bearing and the second bearing, a first extrusion cylinder and a second extrusion cylinder installed on the surface of the rotating rod, and a first gear and a second gear installed on the left side of the rotating rod, with the first gear and the second gear meshing. This device screens the material by installing a screen at the bottom of the hopper, which causes the filtered material to remain on the screen. After long-term use, the material particles that cannot pass through the screen will affect the feeding efficiency and are inconvenient to clean, requiring the machine to be stopped to clean the material particles on the screen, thus affecting processing efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a volumetric feeding device for a twin-screw extruder with an anti-clogging structure, in order to solve the problem mentioned in the background art that installing a screen at the bottom of the hopper to screen the material will cause the filtered material to remain on the screen. After long-term use, the material particles that cannot pass through the screen will affect the feeding efficiency. At the same time, it is inconvenient to clean, and it is necessary to stop the machine to clean the material particles on the screen, which will affect the processing efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a volumetric feeding device for a twin-screw extruder with an anti-clogging structure, comprising a fixed base plate, three supporting vertical plates fixedly connected to the top surface of the fixed base plate, supporting connecting rods fixedly connected to the side ends of the three supporting vertical plates, a screen roller fixedly connected between the three supporting connecting rods, a fixed disk fixedly connected to one end of the screen roller, a first discharge assembly fixedly connected to one side of the fixed disk, a feed inlet connected to the top surface of the other end of the screen roller, a guiding assembly fixedly connected to the other side of the fixed disk, a feeding assembly fixedly connected to the center of the top surface of the fixed base plate, and a rectangular hole opened in the center of the fixed base plate. This device can simultaneously filter and discharge both large and small material particles, resulting in a more uniform overall size of the material particles entering the extruder, ensuring processing quality, optimizing the processing process, eliminating the need for manual cleaning of the screened material, reducing labor intensity, and allowing intermittent feeding of the screened material particles, facilitating control of the feeding speed and improving processing stability.

[0006] Preferably, the first discharge assembly includes an output auger, which is rotatably connected to the inside of the screen roller. One end of the output auger is fixedly connected to a conversion chamber, and a first drive motor is fixedly installed on one side of the conversion chamber. This facilitates the discharge of larger material particles or material blocks that are stuck together through the auger, eliminating the need for manual discharge and cleaning, and improving the degree of automation and safety in the processing.

[0007] Preferably, the output end of the first drive motor is fixedly connected through the conversion chamber and the end of the output auger. The bottom end of the conversion chamber is connected to an output pipe, which is used to discharge materials with larger particles to prevent uneven particle size from affecting the processing quality.

[0008] Preferably, the material guiding assembly includes a sieve plate, which is fixedly connected to the side of the fixed plate by bolts. A material guiding pipe is fixedly connected to the end of the sieve plate near the output pipe. Connecting plates are symmetrically connected to both ends of the sieve plate by bolts. A material guiding plate is fixedly connected to the bottom end of the connecting plate. This assembly can directly classify and discharge materials of suitable particle size and smaller particle size. During processing, materials of suitable particle size are input.

[0009] Preferably, the end of the sieve plate away from the output pipe is connected to the end of the sieve roller by bolts and threads. The sieve roller and the guide plate are inclined. The inclination angle of the connecting plate is opposite to the inclination direction of the sieve roller and the guide plate, so that materials of different particle sizes are discharged in different directions, which is convenient for collection.

[0010] Preferably, the feeding assembly includes multiple supporting columns, with a feeding disc fixedly connected to the top of each supporting column. A second drive motor is fixedly connected to the middle of the bottom of the feeding disc. A rotating storage disc is rotatably connected inside the feeding disc. The output shaft of the second drive motor passes through the bottom wall of the feeding disc and is fixedly connected to the rotating storage disc. Both the feeding disc and the rotating storage disc have discharge holes on their bottom walls, which facilitates the input of relatively equal amounts of material that meets the specifications after screening. This ensures that the feed rate of the equipment remains stable and avoids load fluctuations caused by sudden changes in the feed rate.

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

[0012] By designing the screen roller, output auger, first drive motor, output pipe, feed port, fixed plate, screen plate, connecting plate, guide plate, and guide pipe, the device can screen materials and discharge them to the corresponding positions without the need for manual cleaning of non-standard materials, reducing labor intensity, minimizing manual operation steps, improving operational safety, reducing downtime frequency, and facilitating improved processing efficiency and continuity.

[0013] By designing the support column, feeding plate, second drive motor, rotating storage plate, and discharge hole, the output of the screened material is similar in quantity each time, which improves processing stability and extends the service life of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-dimensional mechanism of this utility model;

[0015] Figure 2 This is the front view of the present utility model;

[0016] Figure 3 This is a top view of the present invention;

[0017] Figure 4 This is a schematic diagram showing the distribution of the output auger positions of this utility model.

[0018] In the diagram: 1. Fixed base plate; 2. Rectangular hole; 3. Supporting vertical plate; 4. Supporting connecting rod; 5. Screen roller; 6. Output auger; 7. First drive motor; 8. Output pipe; 9. Feed inlet; 10. Fixed plate; 11. Screen plate; 12. Connecting plate; 13. Guide plate; 14. Guide pipe; 15. Supporting column; 16. Feeding tray; 17. Second drive motor; 18. Rotating storage tray; 19. Discharge hole; 20. Conversion chamber. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Please see Figure 1-4 This utility model provides a volumetric feeding device for a twin-screw extruder with an anti-clogging structure, including a fixed base plate 1. Supporting vertical plates 3 are fixedly connected to the three sides of the top surface of the fixed base plate 1. Supporting connecting rods 4 are fixedly connected to the side ends of the three supporting vertical plates 3. Screen rollers 5 are fixedly connected between the three supporting connecting rods 4. A fixed disk 10 is fixedly connected to one end of the screen roller 5. A first discharge component is fixedly connected to one side of the fixed disk 10. The top surface of the other end of the screen roller 5 is connected to a feed inlet 9, through which unscreened materials are added. A guiding component is fixedly connected to the other side of the fixed disk 10. A feeding component is fixedly connected to the middle of the top surface of the fixed base plate 1. A rectangular hole 2 is opened in the middle of the fixed base plate 1. The rectangular hole 2 allows the device to be placed above the extruder feed inlet using a lifting tool during use.

[0021] Furthermore, the first discharge assembly includes an output auger 6, which is rotatably connected inside the screen roller 5. One end of the output auger 6 is fixedly connected to a conversion chamber 20, and a first drive motor 7 is fixedly installed on one side of the conversion chamber 20. When in use, the first drive motor 7 is controlled and powered by an external controller and connecting wires. The operation of the first drive motor 7 drives the output auger 6 to rotate and draw out the material inside the screen roller 5.

[0022] Furthermore, the output end of the first drive motor 7 is fixedly connected through the conversion chamber 20 and the end of the output auger 6. The bottom end of the conversion chamber 20 is connected to the output pipe 8. When the first drive motor 7 runs and drives the output auger 6 to rotate, it draws out the material inside the screen roller 5, so that the material enters the conversion chamber 20 and is then discharged through the output pipe 8. The particle size of the material inside the screen roller 5 is larger than the appropriate size. The screen roller 5 is used to screen the material that is larger than the qualified material particles, so that the material particles of the appropriate size and the material particles smaller than the appropriate size pass through the screen roller 5 to enter the next screening step.

[0023] Furthermore, the material guiding assembly includes a screen plate 11, which is fixedly connected to the side of the fixed plate 10 by bolts. A material guiding pipe 14 is fixedly connected to the end of the screen plate 11 near the output pipe 8. Both ends of the screen plate 11 are symmetrically connected to connecting plates 12 by bolts. A material guiding plate 13 is fixedly connected to the bottom of the connecting plate 12. The material particles after being screened by the screen roller 5 enter the screening range of the screen plate 11. Then, the smaller material particles fall onto the material guiding plate 13 through the screen plate 11. Then, the qualified material slides down into the rotating storage plate 18 through the material guiding pipe 14.

[0024] Furthermore, the end of the screen plate 11 away from the output pipe 8 is connected to the end thread of the screen roller 5 by bolts. The screen roller 5 and the guide plate 13 are inclined. The inclination angle of the connecting plate 12 is opposite to the inclination direction of the screen roller 5 and the guide plate 13. The inclined arrangement of the guide plate 13 and the screen plate 11 allows the screened material to be automatically discharged.

[0025] Furthermore, the feeding assembly includes multiple support columns 15, with a feeding tray 16 fixedly connected to the top of each support column 15. A second drive motor 17 is fixedly connected to the middle of the bottom of the feeding tray 16. Before use, the second drive motor 17 is controlled and powered by an external controller and connecting wires. A rotating storage tray 18 is rotatably connected inside the feeding tray 16. The output shaft of the second drive motor 17 passes through the bottom wall of the feeding tray 16 and is fixedly connected to the rotating storage tray 18. Both the feeding tray 16 and the rotating storage tray 18 have discharge holes 19 on their bottom walls. The design of the discharge holes 19 facilitates intermittent, relatively equal feeding when the feeding tray 16 rotates. When the second drive motor 17 runs, it drives the rotating storage tray 18 to rotate. When the rotating storage tray 18 rotates, the feeding tray 16 closes the discharge holes 19 on the rotating storage tray 18. When the two discharge holes 19 are in corresponding positions, the material is discharged.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A volumetric feeding device for a twin-screw extruder with an anti-clogging structure, comprising a fixed base plate (1), characterized in that: The fixed base plate (1) has three supporting vertical plates (3) fixedly connected to its top surface on three sides. The three supporting vertical plates (3) have supporting connecting rods (4) fixedly connected to their side ends. The three supporting connecting rods (4) are fixedly connected to a screen roller (5). One end of the screen roller (5) is fixedly connected to a fixed disk (10). One side of the fixed disk (10) is fixedly connected to a first discharge assembly. The top surface of the other end of the screen roller (5) is connected to a feed inlet (9). The other side of the fixed disk (10) is fixedly connected to a guide assembly. The middle of the top surface of the fixed base plate (1) is fixedly connected to a feeding assembly. The middle of the fixed base plate (1) has a rectangular hole (2).

2. The volumetric feeding device for a twin-screw extruder with an anti-clogging structure according to claim 1, characterized in that: The first discharge assembly includes an output auger (6), which is rotatably connected to the inside of the screen roller (5). One end of the output auger (6) is fixedly connected to a conversion chamber (20), and a first drive motor (7) is fixedly installed on one side of the conversion chamber (20).

3. The volumetric feeding device for a twin-screw extruder with an anti-clogging structure according to claim 2, characterized in that: The output end of the first drive motor (7) is fixedly connected through the conversion compartment (20) and the end of the output auger (6), and the bottom end of the conversion compartment (20) is connected to the output pipe (8).

4. The volumetric feeding device for a twin-screw extruder with an anti-clogging structure according to claim 1, characterized in that: The material guiding assembly includes a screen plate (11), which is fixedly connected to the side of the fixed plate (10) by bolts. A material guiding pipe (14) is fixedly connected to the end of the screen plate (11) near the output pipe (8). Both ends of the screen plate (11) are symmetrically connected to connecting plates (12) by bolts. A material guiding plate (13) is fixedly connected to the bottom end of the connecting plate (12).

5. A volumetric feeding device for a twin-screw extruder with an anti-clogging structure according to claim 4, characterized in that: The end of the screen plate (11) away from the output pipe (8) is connected to the end of the screen roller (5) by bolts and threaded connection. The screen roller (5) and the guide plate (13) are inclined. The inclination angle of the connecting plate (12) is opposite to the inclination direction of the screen roller (5) and the guide plate (13).

6. A volumetric feeding device for a twin-screw extruder with an anti-clogging structure according to claim 1, characterized in that: The feeding assembly includes multiple support columns (15), with a feeding disc (16) fixedly connected to the top of each support column (15). A second drive motor (17) is fixedly connected to the middle of the bottom of the feeding disc (16). A rotating storage disc (18) is rotatably connected inside the feeding disc (16). The output shaft of the second drive motor (17) passes through the bottom wall of the feeding disc (16) and is fixedly connected to the rotating storage disc (18). Both the bottom walls of the feeding disc (16) and the rotating storage disc (18) are provided with discharge holes (19).

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