A twin-screw extrusion pressure dual closed-loop control filtration performance testing machine
By pretreating the masterbatch with a multi-stage sieving device, the problem of large particles in the masterbatch affecting the test results is solved, thus achieving accuracy and reliability in filtration performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO HENGBET NEW MATERIALS CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-17
AI Technical Summary
When evaluating the ability of filters and filter cartridges to retain minute impurities, existing technologies may find that the masterbatch contains large particle carriers or insufficiently dispersed pigment agglomerates, which can interfere with the test results due to the presence of the original particles, making it impossible to distinguish whether the problem is due to filtration failure or a problem with the raw materials themselves.
A multi-stage sieving device is used to pre-treat the masterbatch. The masterbatch is sieved through a combination of a vibrating sieve motor driving a turntable and a linkage column, and a linkage plate and a limit rod. This avoids unsieved masterbatch from directly affecting the test results.
After multi-stage screening, the masterbatch is sieved into appropriate particle sizes to ensure the accuracy of filtration performance test results, avoid interference from raw particles, and accurately distinguish between filtration failure and raw material problems.
Smart Images
Figure CN224518455U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material filtration performance testing, and in particular to a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine. Background Technology
[0002] Before preparing color masterbatch, the raw materials for preparing color masterbatch need to be tested for filtration performance. The results of the filtration performance test directly affect whether the material can be used. As one of the core processes for polymer material processing, the melt pressure stability and filtration performance during the extrusion process of twin-screw extrusion technology directly affect the product quality.
[0003] When applying for this utility model, the applicant, through a search, discovered a Chinese patent disclosed as "A Fully Meshing Twin-Screw Extrusion Pressure Dual Closed-Loop Controlled Filtration Performance Tester," application number "CN201820693022.4." This patent primarily uses a twin-screw extruder to feed material into a metering pump. A pressure sensor after the pump detects the pressure at the metering pump outlet at the start and end of the test. The filtration performance of the material under test is determined by the pressure difference between the metering pump outlet at the end and start of the test. Because the material under test is transported through the twin screws, it is transferred from one screw to the other in an ∞-shaped pattern. The extrusion and coordinated transmission by the two screws effectively avoids the problem of material clogging. Thus, the material under test can be uniformly and smoothly transported into the metering pump, resulting in a stable inlet pressure difference and stable, reliable measurement results.
[0004] However, if the test objective of this device is to evaluate the ability of the filter screen and filter element to retain small impurities, the masterbatch may contain large particle carriers or insufficiently dispersed pigment agglomerates. Especially in low-quality masterbatch, directly using unscreened masterbatch will cause the test results to be interfered with by the original particles, making it impossible to distinguish whether the problem is due to filtration failure or the raw material itself. Utility Model Content
[0005] In view of this, the present invention provides a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine. The main technical problem to be solved is: if the test target is to evaluate the ability of filter screens and filter elements to retain small impurities, the masterbatch may contain large particle carriers or insufficiently dispersed pigment agglomerates. Especially in low-quality masterbatch, directly using unscreened masterbatch will cause the test results to be interfered with by the original particles, making it impossible to distinguish whether it is a filtration failure or a problem with the raw material itself.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine, comprising a shell, a screening chamber inside the shell, a screening motor mounted on the outer wall of the shell, a turntable fixedly connected to the output end of the screening motor, a linkage column fixedly connected to the outer wall of the turntable, a vibrating frame inside the screening chamber, a linkage plate fixedly connected to the outer wall of the vibrating frame, multiple limit rods fixedly connected to both outer walls of the vibrating frame, a baffle fixedly connected to the other end of the multiple limit rods penetrating the outer wall of the shell, a spring fixedly connected to the outer wall of the baffle, the other end of the spring fixedly connected to the outer wall of the shell, multiple sliding grooves on the inner wall of the vibrating frame, multiple locking slots on the outer wall of the vibrating frame, multiple screening boxes inside the vibrating frame, sliding plates fixedly connected to both outer walls of the screening boxes, a locking plate fixedly connected to the outer wall of the screening boxes, and the locking plate fixedly connected to the vibrating frame by bolts.
[0007] By adopting the above technical solution, the color masterbatch is screened in multiple stages, which avoids the situation where the test results are affected by the original particles and cannot be distinguished as a problem with the filter failure or the raw material itself if the unscreened color masterbatch is used directly.
[0008] As a further description of the above technical solution:
[0009] The linkage column is located inside the linkage plate, and the two ends of the card plate are located inside the two card slots in the same group.
[0010] By adopting the above technical solution, when the linkage column follows the turntable to rotate, the linkage plate can drive the vibrating frame to vibrate back and forth under the action of the turntable.
[0011] As a further description of the above technical solution:
[0012] The housing has two conveying chambers inside. A conveying motor is fixedly connected to the bottom of the housing. A drive sprocket is fixedly connected to the output end of the conveying motor. An auger is installed inside each of the two conveying chambers. A gear is fixedly connected to one end of each of the two augers. A driven sprocket is fixedly connected to the outer wall of the gear on the right side. The driven sprocket is connected to the drive sprocket via a chain.
[0013] By adopting the above technical solution, the two screw conveyors can rotate synchronously in opposite directions, thereby transporting molten masterbatch.
[0014] As a further description of the above technical solution:
[0015] The bottom of the outer shell has an inner layer, and the inner layer contains multiple heating wires.
[0016] By adopting the above technical solution, the color masterbatch located inside the conveying cavity is heated to make it melt.
[0017] As a further description of the above technical solution:
[0018] The top right side of the outer casing has a mounting groove, and a filter screen is installed inside the mounting groove.
[0019] By adopting the above technical solution, the installation and removal of the filter screen are facilitated.
[0020] As a further description of the above technical solution:
[0021] A pressure sensor is fixedly connected to the top right side of the housing, and there are two pressure sensors, with the bottoms of the two pressure sensors extending into the interior of the two delivery cavities respectively.
[0022] By adopting the above technical solution, the passability of the filter can be determined according to the preset range set by the pressure sensor.
[0023] As a further description of the above technical solution:
[0024] The bottom of the outer shell is fixedly connected to a support leg, and there are multiple support legs. The left outer wall of the outer shell is movably connected to a door.
[0025] By adopting the above technical solution, it is convenient to clean multiple screening boxes through the silo door.
[0026] As a further description of the above technical solution:
[0027] The top of the outer shell is fixedly connected to a raw material inlet, and the top of the inner wall of the screening chamber is fixedly connected to a guide plate, which is located at the top of the top screening box.
[0028] By adopting the above technical solution, the masterbatch entering the uppermost screening box from the raw material inlet always falls in the center position.
[0029] By employing the above technical solution, the present invention provides a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine with at least the following beneficial effects:
[0030] Compared with existing technologies, this twin-screw extrusion pressure dual closed-loop control filtration performance testing machine requires the masterbatch to be screened before filtration performance testing. During screening, the masterbatch enters the uppermost screening box through the raw material inlet at the top of the outer shell and then through the guide plate. Subsequently, the screening motor drives the turntable to rotate. At the same time, the linkage column connected to the outer wall of the turntable is located inside the linkage plate on the outer wall of the vibrating frame, so that the linkage column rotates synchronously with the turntable and moves along the inside of the linkage plate. Furthermore, because the outer wall of the vibrating frame is connected to multiple limiters... Multiple limiting rods penetrate the outer wall of the housing. One end of each limiting rod is connected to a baffle. A spring is fixedly connected to the outer wall of the baffle, causing the vibrating frame to reciprocate back and forth with the rotation of the turntable. With the assistance of multiple springs, the masterbatch located inside the uppermost screening box is screened. Larger masterbatch is trapped inside the uppermost screening box. Multiple screening boxes are set up to perform multi-stage screening, avoiding the situation where the test results are affected by the original particles and cannot be distinguished as a filter failure or a problem with the raw material itself if unscreened masterbatch is used directly.
[0031] Compared with existing technologies, this twin-screw extrusion pressure dual closed-loop control filtration performance testing machine, after the masterbatch undergoes multi-stage screening, falls into the interior of two lower conveying chambers. Simultaneously, multiple heating wires are installed inside the bottom of the outer shell to melt the masterbatch within the two conveying chambers. The conveying motor drives the drive sprocket to rotate. Since the drive sprocket and driven sprocket are connected by a chain, the auger at the front end and its connected gear rotate synchronously. Due to the meshing of the two gears, the two augers rotate in opposite directions, transporting the molten masterbatch towards the filter screen. If the filter screen has low permeability, it will gradually accumulate at the filter screen until it touches two pressure sensors. The pressure sensors are initially set with a preset range. If the internal pressure received by the pressure sensors exceeds the preset range, it indicates that the filter screen has low permeability and does not meet filtration requirements. Attached Figure Description
[0032] Figure 1 This is a first-view overall structural diagram of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model.
[0033] Figure 2 This is a second-view overall structural diagram of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model.
[0034] Figure 3 This is a schematic diagram of the internal structure of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model;
[0035] Figure 4 This is a schematic diagram of the conveying chamber structure of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model;
[0036] Figure 5 This is a schematic diagram of the vibration frame of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model;
[0037] Figure 6 This is a schematic diagram of the screening motor and turntable of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model.
[0038] Figure 7 This is a schematic diagram of the sieve box structure of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model;
[0039] Figure 8 This is a schematic diagram of the linkage plate of a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine proposed in this utility model.
[0040] Legend:
[0041] 1. Outer shell; 2. Screening chamber; 3. Screening motor; 4. Turntable; 5. Linkage column; 6. Vibrating frame; 7. Linkage plate; 8. Limiting rod; 9. Baffle; 10. Spring; 11. Slide groove; 12. Slot; 13. Screening box; 14. Slide plate; 15. Slot plate; 16. Conveying chamber; 17. Conveying motor; 18. Drive sprocket; 19. Screwdriver; 20. Gear; 21. Driven sprocket; 22. Chain; 23. Interlayer; 24. Heating wire; 25. Mounting slot; 26. Filter screen; 27. Pressure sensor; 28. Support leg; 29. Door; 30. Raw material inlet; 31. Guide plate. Detailed Implementation
[0042] Reference Figure 1-8This utility model provides a twin-screw extrusion pressure dual closed-loop control filtration performance testing machine: It includes a housing 1, with a screening chamber 2 inside the housing 1. A screening motor 3 is installed on the outer wall of the housing 1, and a turntable 4 is fixedly connected to the output end of the screening motor 3. A linkage column 5 is fixedly connected to the outer wall of the turntable 4. A vibrating frame 6 is installed inside the screening chamber 2, and a linkage plate 7 is fixedly connected to the outer wall of the vibrating frame 6. Limiting rods 8 are fixedly connected to both outer walls of the vibrating frame 6, and there are multiple limiting rods 8. The other ends of the multiple limiting rods 8 penetrate the outer wall of the housing 1 and are fixedly connected to baffles 9. A spring 10 is fixedly connected to the outer wall of the vibrating frame 6, and the other end of the spring 10 is fixedly connected to the outer wall of the outer shell 1. Multiple sliding grooves 11 are provided on the inner wall of the vibrating frame 6. Multiple slots 12 are provided on the outer wall of the vibrating frame 6. Multiple screening boxes 13 are provided inside the vibrating frame 6. Slide plates 14 are fixedly connected to both outer walls of the screening boxes 13. A retaining plate 15 is fixedly connected to the outer wall of the screening boxes 13. Both ends of the retaining plate 15 are located inside two slots 12 in the same group. The retaining plate 15 is fixedly connected to the vibrating frame 6 by bolts. Before conducting filtration performance testing, the masterbatch needs to be screened. During screening, the masterbatch enters the uppermost screening box 13 through the raw material inlet 30 at the top of the outer shell 1 and then through the guide plate 31. Subsequently, the screening motor 3 drives the turntable 4 to rotate. At the same time, the linkage column 5 connected to the outer wall of the turntable 4 is located inside the linkage plate 7 on the outer wall of the vibrating frame 6. The linkage column 5 is located inside the linkage plate 7, so that the linkage column 5 rotates synchronously with the turntable 4 and moves along the inside of the linkage plate 7. Furthermore, since multiple limiting rods 8 are connected to the outer wall of the vibrating frame 6, the multiple limiting rods 8... The limit rod 8 penetrates the outer wall of the outer shell 1. One end of the limit rod 8 is connected to the baffle 9. The outer wall of the baffle 9 is fixedly connected to the spring 10, so that the vibrating frame 6 reciprocates back and forth with the rotation of the turntable 4. With the assistance of multiple springs 10, the masterbatch inside the uppermost screening box 13 is screened. Larger masterbatch is trapped inside the uppermost screening box 13. Multiple screening boxes 13 are set up to perform multi-stage screening, avoiding the situation where the test results are affected by the original particles and cannot be distinguished as a filter failure or a problem with the raw material itself if the unscreened masterbatch is used directly.
[0043] The outer casing 1 has two conveying chambers 16 inside. A conveying motor 17 is fixedly connected to the bottom of the outer casing 1, and a drive sprocket 18 is fixedly connected to the output end of the conveying motor 17. Each of the two conveying chambers 16 has an auger 19 inside, and a gear 20 is fixedly connected to one end of each auger 19. A driven sprocket 21 is fixedly connected to the outer wall of the right gear 20. The driven sprocket 21 is connected to the drive sprocket 18 via a chain 22. A sandwich layer 23 is provided inside the bottom of the outer casing 1, and multiple heating wires 24 are installed inside the sandwich layer 23. The top right side of the outer casing 1... An installation groove 25 is provided, and a filter screen 26 is installed inside the installation groove 25. After the masterbatch is screened through multiple stages, it falls into the two conveying chambers 16 below. At the same time, multiple heating wires 24 are set inside the bottom of the outer shell 1 to make the masterbatch inside the two conveying chambers 16 melt. Simultaneously, the conveying motor 17 runs and drives the drive sprocket 18 to rotate. Since the drive sprocket 18 and the driven sprocket 21 are connected by a chain 22, the front auger 19 and the gear 20 connected to it rotate synchronously. Since the two gears 20 mesh, the two augers 19 rotate in opposite directions, transporting the melted masterbatch to the direction of the filter screen 26.
[0044] A pressure sensor 27 is fixedly connected to the top right side of the housing 1. There are two pressure sensors 27, model "PT460". The bottom of the two pressure sensors 27 extends into the interior of the two conveying chambers 16 respectively. If the filter screen 26 has low throughput, it will gradually accumulate at the filter screen 26 until it touches the two pressure sensors 27. The pressure sensors 27 are initially set with a preset range. If the internal pressure received by the pressure sensor 27 exceeds the preset range, it means that the filter screen 26 has low throughput and does not meet the filtration requirements.
[0045] The bottom of the outer shell 1 is fixedly connected with a support leg 28, and there are multiple support legs 28. The left outer wall of the outer shell 1 is movably connected with a door 29. The top of the outer shell 1 is fixedly connected with a raw material inlet 30. The top of the inner wall of the screening chamber 2 is fixedly connected with a guide plate 31, which is located on the top of the top screening box 13.
[0046] Working Principle: Before conducting filtration performance testing, the masterbatch needs to be screened. During screening, the masterbatch enters the uppermost screening box 13 through the raw material inlet 30 at the top of the outer shell 1 and then through the guide plate 31. Subsequently, the screening motor 3 drives the turntable 4 to rotate. At the same time, the linkage column 5 connected to the outer wall of the turntable 4 is located inside the linkage plate 7 on the outer wall of the vibrating frame 6, so that the linkage column 5 rotates synchronously with the turntable 4 and moves along the inside of the linkage plate 7. Furthermore, since the outer wall of the vibrating frame 6 is connected to multiple limiting rods 8, which penetrate the outer wall of the outer shell 1, one end of the limiting rod 8 is connected to a baffle 9. The outer wall of the baffle 9 is fixedly connected to a spring 10, causing the vibrating frame 6 to reciprocate back and forth with the rotation of the turntable 4. With the assistance of the multiple springs 10, the masterbatch located inside the uppermost screening box 13 is screened. Larger masterbatch is trapped inside the uppermost screening box 13. Multiple screening boxes 13 are set up. It can perform multi-stage sieving, avoiding the interference of the original particles in the test results caused by directly using unscreened masterbatch. After multi-stage sieving, the masterbatch falls into the two lower conveying chambers 16. At the same time, multiple heating wires 24 are set inside the bottom of the outer shell 1 to melt the masterbatch inside the two conveying chambers 16. Simultaneously, the conveying motor 17 drives the drive sprocket 18 to rotate. Since the drive sprocket 18 and the driven sprocket 21 are connected by a chain 22, the front auger 19 and the gear 20 connected to it rotate synchronously. Since the two gears 20 mesh, the two augers 19 rotate in opposite directions, transporting the melted masterbatch to the direction of the filter screen 26. If the filter screen 26 has low throughput, it will gradually accumulate at the filter screen 26 until it touches the two pressure sensors 27. The pressure sensors 27 are initially set with a preset range. If the internal pressure received by the pressure sensor 27 exceeds the preset range, it means that the filter screen 26 has low throughput and does not meet the filtration requirements.
[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.
Claims
1. A twin screw extrusion pressure dual closed loop control filter performance testing machine comprising a housing (1) characterised in that: The shell (1) has a screening chamber (2) inside. A screening motor (3) is installed on the outer wall of the shell (1). A turntable (4) is fixedly connected to the output end of the screening motor (3). A linkage column (5) is fixedly connected to the outer wall of the turntable (4). A vibrating frame (6) is installed inside the screening chamber (2). A linkage plate (7) is fixedly connected to the outer wall of the vibrating frame (6). Limiting rods (8) are fixedly connected to both outer walls of the vibrating frame (6). There are multiple limiting rods (8). The other end of the multiple limiting rods (8) passes through the outer wall of the shell (1) and is fixedly connected to a baffle (9). The outer wall of the baffle (9) is fixedly connected to the baffle. A spring (10) is connected to the vibrating frame (6), and the other end of the spring (10) is fixedly connected to the outer wall of the outer shell (1). The inner wall of the vibrating frame (6) is provided with a sliding groove (11), and there are multiple sliding grooves (11). The outer wall of the vibrating frame (6) is provided with a slot (12), and there are multiple slots (12). The vibrating frame (6) is provided with a screening box (13), and there are multiple screening boxes (13). The outer walls on both sides of the screening box (13) are fixedly connected with a sliding plate (14). The outer wall of the screening box (13) is fixedly connected with a clamping plate (15), and the clamping plate (15) is fixedly connected to the vibrating frame (6) by bolts.
2. The twin-screw extrusion pressure dual closed-loop control filter performance testing machine according to claim 1, characterized in that: The linkage column (5) is located inside the linkage plate (7), and the two ends of the card plate (15) are located inside the two card slots (12) in the same group.
3. The twin-screw extrusion pressure dual closed-loop control filter performance testing machine according to claim 1, characterized in that: The housing (1) has a conveying chamber (16) inside, and there are two conveying chambers (16). A conveying motor (17) is fixedly connected to the bottom of the housing (1). A drive sprocket (18) is fixedly connected to the output end of the conveying motor (17). An auger (19) is provided inside each of the two conveying chambers (16). A gear (20) is fixedly connected to one end of each of the two augers (19). A driven sprocket (21) is fixedly connected to the outer wall of the gear (20) on the right side. The driven sprocket (21) is connected to the drive sprocket (18) through a chain (22).
4. The twin-screw extrusion pressure dual closed-loop control filter performance testing machine according to claim 1, characterized in that: The bottom end of the outer shell (1) is provided with a sandwich layer (23), and a heating wire (24) is provided inside the sandwich layer (23), and there are multiple heating wires (24).
5. The twin screw extrusion pressure dual closed loop control filter performance testing machine of claim 1, wherein: The outer casing (1) has a mounting groove (25) on the top right side, and a filter screen (26) is installed inside the mounting groove (25).
6. The twin screw extrusion pressure dual closed loop control filter performance testing machine of claim 3, wherein: A pressure sensor (27) is fixedly connected to the top right side of the housing (1), and there are two pressure sensors (27). The bottoms of the two pressure sensors (27) extend into the interior of the two delivery cavities (16).
7. The twin screw extrusion pressure dual closed loop control filter performance testing machine of claim 1, wherein: The bottom of the outer shell (1) is fixedly connected with a support leg (28), and there are multiple support legs (28). The left outer wall of the outer shell (1) is movably connected with a door (29).
8. The twin screw extrusion pressure dual closed loop control filter performance testing machine of claim 1, wherein: The top of the outer shell (1) is fixedly connected to a raw material inlet (30), and the top of the inner wall of the screening chamber (2) is fixedly connected to a guide plate (31), which is located at the top of the top screening box (13).