Melt flow rate instrument for testing modified plastic

Abstract

The utility model relates to the field of plastic processing, and discloses a melt flow rate meter for testing modified plastics, which comprises a hollow cuboid, two fixed plates I are fixedly connected to the inner wall of the hollow cuboid, and fixed blocks I are rotatably connected to the close sides of the two fixed plates I; a second fixing block is fixedly connected to the top end of the first fixing block, a first air cylinder is fixedly connected to the interior of the second fixing block, an L-shaped plate is rotatably connected to the driving end of the first air cylinder, a first connecting rod is rotatably connected to one side of the interior of the L-shaped plate, and a first connecting plate is rotatably connected to the interior of the L-shaped plate; a second connecting rod is fixedly connected into the first connecting plate. According to the utility model, the magnitude and the applying speed of the pressure can be accurately controlled through the air cylinder. In the modified plastic test, different modified plastics need specific pressure conditions to accurately measure the melt flow rate.

Description

Technical Field

[0001] This utility model relates to the field of plastics processing, and in particular to a melt flow rate meter for testing modified plastics. Background Technology

[0002] A melt flow rate meter, also known as a melt indexer, is mainly used to determine the melt flow rate of various plastics and resins, including modified plastics, in a viscous flow state. It is widely used in plastics production, plastic products, petrochemicals, and other fields, as well as in universities, research institutions, and quality inspection departments. Under specified temperature and load, a modified plastic sample is placed in a heating furnace and heated to a molten state. It is then extruded through a standard die under gravity or external force. The mass or volume of the extruded plastic melt is measured within a certain time to obtain the melt flow rate. This value reflects the viscous flow characteristics of the modified plastic in the molten state. It is easy to operate, with a user-friendly interface, and is equipped with a touch screen or button control panel for easy setting of test parameters.

[0003] Melt flow rate meters for modified plastics testing use cylinders to press the material. The cylinders allow for precise control of pressure and application speed. Different modified plastics require specific pressure conditions to accurately measure their melt flow rate. Compared to traditional weight loading methods, cylinders can more accurately meet these requirements, reducing pressure fluctuations and improving the accuracy and repeatability of test results. For some modified plastics sensitive to pressure changes, precise pressure control can avoid measurement errors caused by pressure instability. The cylinders can quickly respond to control signals, enabling rapid pressure application and adjustment. During testing, if the pressure needs to be changed according to sample characteristics or test requirements, the cylinders can react quickly, saving testing time and improving efficiency. Simultaneously, it facilitates real-time monitoring and fine-tuning of the pressure during testing to ensure the stability of test conditions.

[0004] Melt flow rate meters for modified plastics testing often involve manual pressure application or other cumbersome pressing methods. This not only increases the workload of operators but also slows down the operation, prolonging each test and reducing efficiency. When testing a large number of samples, manual pressing consumes significant time and effort, affecting the testing progress. It is also difficult to precisely adjust the pressure, leading to pressure instability and variations in pressure conditions between tests, impacting the accuracy and repeatability of results. When testing different batches of modified plastics requiring the same pressure conditions, inaccurate pressure control results in significant deviations, failing to accurately reflect the true melt flow rate of the material. For some modified plastics sensitive to pressure changes, the inability to precisely control pressure increases the error in test results, potentially leading to incorrect conclusions and affecting the accurate evaluation of material properties. Therefore, a melt flow rate meter for modified plastics testing is proposed to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a melt flow rate meter for testing modified plastics, aiming to improve the problems of low pressure control accuracy, poor pressure adjustment flexibility, high operating intensity and low efficiency in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A melt flow rate tester for modified plastics includes a hollow cuboid. Two fixing plates are fixedly connected to the inner wall of the hollow cuboid. A fixing block is rotatably connected to an adjacent side of each of the two fixing plates. A fixing block is fixedly connected to the top of the fixing block. A cylinder is fixedly connected inside the fixing block. An L-shaped plate is rotatably connected to the driving end of the cylinder. A connecting rod is rotatably connected to one side of the L-shaped plate. A connecting plate is rotatably connected inside the L-shaped plate. A connecting rod is fixedly connected inside the connecting plate. A pressing rod is rotatably connected to the outer side of the connecting rod. A square box is fixedly connected inside the hollow cuboid. A melt flow indexer is fixedly connected to the bottom of the hollow cuboid. A disassembly assembly is installed inside the melt flow indexer.

[0008] As a further description of the above technical solution:

[0009] The disassembly assembly includes a square box two, the outer wall of which is fixedly connected to the inside of the melt flow indexer. A fixing plate three is fixedly connected to the inside of the square box two. A cylinder two is fixedly connected to the inside of the fixing plate three. A connecting plate two is fixedly connected to the drive end of the cylinder two. Both ends of the connecting plate two are rotatably connected to buckles. A fixing rod is slidably connected to the inside of each of the two buckles. The outer walls of the two buckles are engaged with the fixing plate two. A motor is fixedly connected to the inside of the fixing plate two. A scraper is fixedly connected to the drive end of the motor.

[0010] As a further description of the above technical solution:

[0011] The outer side of the L-shaped plate is rotatably connected to the inner wall of the square box, and the outer wall of the pressing rod is slidably connected to the inside of the melt flow indexer.

[0012] As a further description of the above technical solution:

[0013] The outer side of the pressing rod is slidably connected to the interior of the hollow cuboid, and the outer wall of the pressing rod is slidably connected to the interior of the square box.

[0014] As a further description of the above technical solution:

[0015] The outer wall of connecting rod one is rotatably connected to the inside of square box one, and the outer wall of connecting rod two is rotatably connected to the inside of square box one;

[0016] As a further description of the above technical solution:

[0017] The outer side of the first connecting plate is rotatably connected to the inner wall of the pressing rod, and the rear end of the second fixing plate is in contact with the front end of the melt flow indexer;

[0018] As a further description of the above technical solution:

[0019] The rear end of the fixing plate three is fixedly connected to the inner wall of the square box two, and the rear end of the cylinder two is fixedly connected to the inner wall of the square box two.

[0020] As a further description of the above technical solution:

[0021] The fixing rod is fixedly connected inside the square box 2, and the connecting plate 2 is slidably connected inside the square box 2.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the operation of the cylinder causes the pressing rod to press the material. By adjusting the air source pressure and flow rate, the output pressure of the cylinder can be easily adjusted to meet the testing requirements of different modified plastics. Whether it is a low-viscosity or high-viscosity modified plastic, the appropriate pressing pressure can be obtained through simple adjustment to ensure the accuracy of the test. The cylinder can quickly respond to the control signal to realize the rapid start and stop of the pressing action. In the testing of modified plastics, this helps to quickly build up the required pressure, so that the melt quickly passes through the die, improving the testing efficiency. It is especially suitable for occasions where the testing time is critical. The cylinder usually has good overload protection capability. When encountering excessive resistance or exceeding the set pressure, the cylinder will automatically stop or buffer to avoid damage to the instrument and sample.

[0024] 2. In this utility model, the motor can be replaced by disassembling the components. When the motor malfunctions, such as a short circuit in the motor windings or wear of the motor bearings, directly replacing the motor can quickly eliminate the fault and avoid affecting the normal operation of the test due to excessive time spent on motor repair. Moreover, for some complex motor faults, repair requires professional technology and equipment, while replacing the motor is relatively simple, reducing the difficulty and cost of maintenance. As the usage time increases, the performance of the motor will gradually decline, such as unstable speed and reduced output torque. Timely replacement of the motor can ensure that the instrument is always in good operating condition and avoid additional wear and pressure on other parts of the instrument due to the decline in motor performance, thereby extending the service life of the entire melt flow rate meter. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a melt flow rate tester for modified plastics proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the hollow cuboid structure of a melt flow rate tester for modified plastics proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0029] Legend:

[0030] 1. Hollow cuboid; 2. Fixing plate one; 3. Fixing block one; 4. Fixing block two; 5. Cylinder one; 6. L-shaped plate; 7. Connecting rod one; 8. Connecting plate one; 9. Connecting rod two; 10. Pressing rod; 11. Square box one; 12. Square box two; 13. Cylinder two; 14. Connecting plate two; 15. Buckle; 16. Fixing rod; 17. Fixing plate two; 18. Motor; 19. Scraper; 20. Fixing plate three; 21. Melt indexer. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1 to 3 This utility model provides an embodiment of a melt flow rate meter for testing modified plastics, comprising a hollow cuboid 1, which provides installation space for subsequent components. Two fixing plates 2 are fixedly connected to the inner wall of the hollow cuboid 1, providing installation space for the fixing plates 2 and improving the stability of subsequent components. Fixing blocks 3 are rotatably connected to adjacent sides of the two fixing plates 2, providing support and limiting for the fixing blocks 3. A second fixing block 4 is fixedly connected to the top of the fixing blocks 3, moving the second fixing block 4 and causing the first fixing block 3 to move. A cylinder 5 is fixedly connected inside the second fixing block 4, serving as the driving source, and the second fixing block 4 provides stability for it.

[0033] The drive end of cylinder 5 is rotatably connected to an L-shaped plate 6. When cylinder 5 extends or retracts, it drives the L-shaped plate 6 to move. A connecting rod 7 is rotatably connected to one side of the inside of the L-shaped plate 6. The connecting rod 7 provides support and limit for the L-shaped plate 6. A connecting plate 8 is rotatably connected inside the L-shaped plate 6. When the L-shaped plate 6 moves, it drives the connecting plate 8 to move. A connecting rod 9 is fixedly connected inside the connecting plate 8. The connecting rod 9 provides stability and limit for the connecting plate 8. A pressing rod 10 is rotatably connected to the outside of the connecting rod 9. When the connecting rod 9 moves, it drives the pressing rod 10 to move, achieving a pressing effect. A square box 11 is fixedly connected inside the hollow cuboid 1. The square box 11 provides stability and limit for the pressing rod 10 when it moves. A melt indexer 21 is fixedly connected to the bottom of the hollow cuboid 1. The melt indexer 21 provides stability and installation space for the hollow cuboid 1. A disassembly assembly is installed inside the melt indexer 21, which facilitates subsequent replacement and maintenance.

[0034] Reference Figures 2 to 4 The disassembly assembly includes a square box 2 12, which provides installation space for subsequent components. The outer wall of the square box 2 12 is fixedly connected to the inside of the melt flow indexer 21. The melt flow indexer 21 provides installation space and stability for the square box 2 12. A fixing plate 3 20 is fixedly connected inside the square box 2 12. A cylinder 2 13 is fixedly connected inside the fixing plate 3 20. The fixing plate 3 20 provides stability for the cylinder 2 13. A connecting plate 2 14 is fixedly connected to the drive end of the cylinder 2 13. The cylinder 2 13 is the drive source that pushes the connecting plate 2 14 to move.

[0035] Both ends of the connecting plate 14 are rotatably connected to buckles 15. When the connecting plate 14 moves, it drives the buckles 15 to move as well. Both buckles 15 are slidably connected to fixing rods 16, which provide a limiting effect for the buckles 15. The outer walls of the two buckles 15 are engaged with fixing plate 17. The buckles 15 are engaged with fixing plate 17 through the cooperation of connecting plate 14 and buckles 15, achieving a fixed effect. A motor 18 is fixedly connected inside fixing plate 17. The motor 18 is the drive source. Fixing plate 17 provides stability to the motor 18 so that it does not shake when rotating. A scraper 19 is fixedly connected to the drive end of the motor 18. The motor 18 drives the scraper 19 to rotate, achieving the corresponding scraping effect.

[0036] Reference Figures 2 to 4 The outer side of the L-shaped plate 6 is rotatably connected to the inner wall of the square box 11. The square box 11 provides a limit and rotation space for the L-shaped plate 6 when it rotates. The outer wall of the pressing rod 10 is slidably connected to the inside of the melt indexer 21. The melt indexer 21 provides stability when the pressing rod 10 slides. The outer side of the pressing rod 10 is slidably connected to the inside of the hollow cuboid 1. The hollow cuboid 1 provides a limit and stability effect for the pressing rod 10. The outer wall of the pressing rod 10 is slidably connected to the inside of the square box 11. 1. To provide stability and limit the movement of the pressing rod 10, the outer wall of the connecting rod 1 7 is rotatably connected to the inside of the square box 11. The square box 11 provides limit and stable operation for the connecting rod 1 7. The outer wall of the connecting rod 2 9 is rotatably connected to the inside of the square box 11. The square box 11 provides stability and limit the rotation of the connecting rod 2 9. The outer side of the connecting plate 1 8 is rotatably connected to the inner wall of the pressing rod 10. The pressing rod 10 provides stability and limit the operation of the connecting plate 1 8.

[0037] The rear end of the second fixing plate 17 is attached to the front end of the melt flow indexer 21. During the disassembly of the components, the second fixing plate 17 and the melt flow indexer 21 are attached to each other to improve stability. The rear end of the third fixing plate 20 is fixedly connected to the inner wall of the second square box 12. The second square box 12 provides stability for the third fixing plate 20, making the cylinder more stable during operation. The rear end of the second cylinder 13 is fixedly connected to the inner wall of the second square box 12. The second square box 12 provides stability for the second cylinder 13 during operation, preventing it from shaking. The fixing rod 16 is fixedly connected to the inside of the second square box 12. The second square box 12 provides stability for the fixing rod 16, making the buckle 15 more stable when it moves. The second connecting plate 14 is slidably connected to the inside of the second square box 12. The second square box 12 provides stability for the second connecting plate 14 when it slides.

[0038] Working principle: Two fixed plates 2 on the inner wall of the hollow cuboid 1 support and allow the fixed block 3 to rotate flexibly between the two fixed plates 2. When the fixed block 3 moves, it drives the fixed block 4 connected at the top to rotate. The cylinder 5 inside the fixed block 4 is activated. The driving end of the cylinder 5 pushes the L-shaped plate 6. The connecting rod 7 inside the L-shaped plate 6 plays a supporting and limiting role when the L-shaped plate 6 moves. The L-shaped plate 6 drives the internal connecting plate 8 to move through the extension and retraction of the cylinder 5. Under the drive of the L-shaped plate 6, the connecting plate 8 drives the other half of the connecting pressing rod 10 to press. When the pressing rod 10 is pressed, the outer connecting rod 9 will move up and down along the sliding groove opened inside the square box 11 to achieve the limiting effect.

[0039] When it is necessary to disassemble or install the scraper 19 inside the melt flow indexer 21, the square box 22 comes into play. Its outer wall is fixed inside the melt flow indexer 21, and the cylinder 23 fixed on the fixing plate 3 20 inside is activated. The drive end pushes the connecting plate 2 14 fixed to it to move. The buckles 15 rotatably connected at both ends inside the connecting plate 2 14 slide on the fixing rod 16. When the cylinder 2 13 drives the connecting plate 2 14 to slide the buckles 15 outward, the buckles 15 disengage from the fixing plate 2 17. At this time, the solid... The fixed plate 17, along with the motor 18 fixed inside it and the scraper 19 fixed at the drive end of the motor 18, can be removed from the melt indexer 21 for disassembly. When it is to be installed, the fixed plate 17 is placed in a suitable position, and the cylinder 13 drives the connecting plate 14 to move in the opposite direction, so that the buckle 15 slides inward and engages with the fixed plate 17, fixing the fixed plate 17, the motor 18 and the scraper 19 inside the melt indexer 21. In use, the motor 18 drives the scraper 19 to rotate to perform corresponding scraping and other operations.

[0040] 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 melt flow rate meter for testing modified plastics, comprising a hollow cuboid (1), characterized in that: The inner wall of the hollow cuboid (1) is fixedly connected to two fixing plates (2). The two fixing plates (2) are rotatably connected to a fixing block (3) on the adjacent side. The top of the fixing block (3) is fixedly connected to a fixing block (4). The inside of the fixing block (4) is fixedly connected to a cylinder (5). The driving end of the cylinder (5) is rotatably connected to an L-shaped plate (6). The inside of the L-shaped plate (6) is rotatably connected to a connecting rod (7). The inside of the L-shaped plate (6) is rotatably connected to a connecting plate (8). The inside of the connecting plate (8) is fixedly connected to a connecting rod (9). The outside of the connecting rod (9) is rotatably connected to a pressing rod (10). The inside of the hollow cuboid (1) is fixedly connected to a square box (11). The bottom of the hollow cuboid (1) is fixedly connected to a melt indexer (21). The inside of the melt indexer (21) is equipped with a disassembly assembly.

2. The melt flow rate tester for modified plastics according to claim 1, characterized in that: The disassembly assembly includes a square box two (12), the outer wall of which is fixedly connected to the inside of the melt flow indexer (21). A fixing plate three (20) is fixedly connected inside the square box two (12). A cylinder two (13) is fixedly connected inside the fixing plate three (20). A connecting plate two (14) is fixedly connected to the drive end of the cylinder two (13). Both ends of the connecting plate two (14) are rotatably connected to buckles (15). A fixing rod (16) is slidably connected inside the two buckles (15). A fixing plate two (17) is engaged with the outer wall of the two buckles (15). A motor (18) is fixedly connected inside the fixing plate two (17). A scraper (19) is fixedly connected to the drive end of the motor (18).

3. The melt flow rate tester for modified plastics according to claim 1, characterized in that: The outer side of the L-shaped plate (6) is rotatably connected to the inner wall of the square box (11), and the outer wall of the pressing rod (10) is slidably connected to the inside of the melt indexer (21).

4. The melt flow rate tester for modified plastics according to claim 1, characterized in that: The outer side of the pressing rod (10) is slidably connected to the interior of the hollow cuboid (1), and the outer wall of the pressing rod (10) is slidably connected to the interior of the square box (11).

5. A melt flow rate tester for modified plastics according to claim 1, characterized in that: The outer wall of the first connecting rod (7) is rotatably connected to the inside of the first square box (11), and the outer wall of the second connecting rod (9) is rotatably connected to the inside of the first square box (11).

6. A melt flow rate tester for modified plastics according to claim 2, characterized in that: The outer side of the connecting plate one (8) is rotatably connected to the inner wall of the pressing rod (10), and the rear end of the fixing plate two (17) is in contact with the front end of the melt indexer (21).

7. A melt flow rate tester for modified plastics according to claim 2, characterized in that: The rear end of the fixing plate three (20) is fixedly connected to the inner wall of the square box two (12), and the rear end of the cylinder two (13) is fixedly connected to the inner wall of the square box two (12).

8. A melt flow rate tester for modified plastics according to claim 2, characterized in that: The fixing rod (16) is fixedly connected inside the square box two (12), and the connecting plate two (14) is slidably connected inside the square box two (12).

Images