Device for testing flow properties of fibrous material

Abstract

The utility model discloses a device for testing the flow performance of fiber material belongs to material performance test technical field, including work table, the lower pressure mould of setting in the middle part of work table and the flow groove of inside opening, is equipped with flow distance measuring piece in flow groove. The periphery of work table is connected with the pressure table of slidable through guide rod, and the middle part of pressure table is connected hydraulic cylinder through hydraulic rod, and the bottom of hydraulic rod is fixed with mould connecting piece. The vertical groove is opened in the middle part of hydraulic cylinder, and material push assembly is equipped in it, and the assembly includes volume box and nozzle. When working, the quantitative material is loaded into volume box, and the push through -hole of nozzle, mould connecting piece is coaxial alignment with flow distance measuring piece center with hydraulic drive die and makes, then material is pressed into flow groove, and the flow performance is evaluated through the flow distance measurement of material on flow distance measuring piece. The utility model discloses compact structure, easy operation, test result is intuitive and reliable, is suitable for the standardization test and contrast of fiber reinforced composite material flow performance.

Description

Technical Field

[0001] This invention relates to an apparatus for testing the flow properties of fibrous materials, and belongs to the field of material performance testing technology. Background Technology

[0002] In molding processes such as compression molding and injection molding, the flow properties of fiber-reinforced composite materials, such as SMC and BMC, are key factors affecting product quality, mold filling effect, and process parameter settings. Currently, common methods for evaluating the flow properties of these materials include spiral flow length testing and flat plate flow testing. These methods are either performed on dedicated large-channel molds or involve cumbersome testing processes, high equipment requirements, and the test results are easily affected by human operation and mold alignment accuracy. Existing simple testing devices often lack precise quantitative feeding, reliable mold alignment, and intuitive flow distance measurement mechanisms, resulting in poor repeatability and comparability of test data. This makes it difficult to meet the needs of rapid, accurate, and standardized testing of flow properties in material research and development, formulation optimization, and online quality control. Therefore, there is an urgent need to develop a dedicated testing device for the flow properties of fiber materials that is structurally sound, easy to operate, accurate, and highly repeatable. Utility Model Content

[0003] The purpose of this invention is to provide a device for testing the flow properties of fiber materials that integrates quantitative material loading, precise mold alignment, pressure injection, and direct observation, thereby achieving standardization and automation of the testing process and effectively improving testing efficiency and the accuracy of results.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a device for testing the flow properties of fiber materials, including a worktable, a pressing mold in the middle of the worktable, a flow groove in the pressing mold, a flow distance measuring component in the flow groove, four guide rods fixedly connected around the worktable, a pressure platform on the guide rod, the pressure platform slidably connected to the guide rod, a hydraulic rod in the middle of the pressure platform, a hydraulic cylinder at the top of the hydraulic rod, a mold connector fixedly connected to the bottom of the hydraulic rod, a pushing through hole in the middle of the mold connector, a vertical groove in the middle of the hydraulic cylinder, a material pushing component fixedly connected in the vertical groove near the worktable, the material pushing component including a volume box and a nozzle, the volume box fitting against the inner wall of the vertical groove, and the nozzle fixedly connected to the bottom of the volume box.

[0005] According to the above technical solution, support blocks are fixedly connected to both sides of the bottom of the workbench.

[0006] According to the above technical solution, the flow distance measuring component is composed of multiple circular arcs.

[0007] According to the above technical solution, the pressure table is provided with sliding rod holes around its perimeter, and a guide sleeve is provided inside the sliding rod holes, with the guide rod sleeved inside the guide sleeve.

[0008] According to the above technical solution, a hydraulic through hole is provided in the middle of the pressure table, and a hydraulic rod is disposed in the hydraulic through hole.

[0009] According to the above technical solution, the nozzle is coaxially aligned with the center of the push through hole and the flow distance measuring component.

[0010] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: quantitative loading through an independent volume box ensures the consistency of the initial material quantity for each test; the precise guide rod-guide sleeve sliding pair and coaxial alignment design guarantee the mold closing accuracy and the centering of the injection point, greatly reducing human operation errors, making the test conditions highly uniform, and the results highly repeatable; the flow distance measuring device set in the flow channel allows the distance of the material flow front to be read directly and accurately, quantifying complex flow behavior into a clear length index, and the evaluation results are intuitive and accurate. It is suitable for testing the flow performance of fiber-reinforced liquid composite materials of various viscosities. By adjusting parameters such as injection pressure and test temperature, different process conditions can be simulated, providing effective data support for material formulation screening and process optimization. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the flow distance measuring component of this utility model; In the diagram: 1. Workbench; 2. Pressing die; 4. Flow distance measuring component; 5. Guide rod; 6. Pressing table; 7. Hydraulic rod; 8. Hydraulic cylinder; 9. Die connector; 10. Pushing through hole; 12. Material pushing assembly; 13. Volume box; 14. Nozzle; 15. Support block. Detailed Implementation

[0012] 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.

[0013] See Figure 1 This utility model provides a technical solution: a device for testing the flow properties of fiber materials, including a workbench 1, a pressing mold 2 in the middle of the workbench 1, a flow groove inside the pressing mold 2, a flow distance measuring element 4 inside the flow groove, four guide rods 5 fixedly connected around the workbench 1, a pressure platform 6 on the guide rods 5, the pressure platform 6 being slidably connected to the guide rods 5, a hydraulic rod 7 in the middle of the pressure platform 6, a hydraulic cylinder 8 at the top of the hydraulic rod 7, a mold connecting member 9 fixedly connected to the bottom of the hydraulic rod 7, a pushing through hole 10 in the middle of the mold connecting member 9, a vertical groove in the middle of the hydraulic cylinder 8, a material pushing component 12 fixedly connected in the vertical groove near the workbench 1, the material pushing component 12 including a volume box 13 and a nozzle 14, the volume box 13 being in contact with the inner wall of the vertical groove, and the nozzle 14 being fixedly connected to the bottom of the volume box 13.

[0014] Support blocks 15 are fixedly connected to both sides of the bottom of the workbench 1.

[0015] The flow distance measuring element 4 is composed of multiple circular arcs.

[0016] The pressure table 6 has sliding rod holes around its perimeter, and a guide sleeve is provided inside the sliding rod holes. The guide rod 5 is sleeved inside the guide sleeve.

[0017] The pressure table 6 has a hydraulic through hole in the middle, and the hydraulic rod 7 is disposed in the hydraulic through hole.

[0018] The nozzle 14 is coaxially aligned with the center of the push through hole 10 and the flow distance measuring element 4.

[0019] Working principle: Before the test begins, the operator loads the pre-weighed or pre-quantitatively sized fiber-reinforced liquid composite material to be tested into the volume box (13) of the material delivery assembly (12). This quantitative loading ensures that the initial mass or volume of the material is consistent for each test, which is a primary condition for achieving comparability of test results. The volume box (13) is independently set in the vertical slot of the hydraulic cylinder (8), spatially isolated from the hydraulic drive system, to avoid hydraulic vibration from interfering with the initial state of the material.

[0020] The hydraulic cylinder (8) is activated, driving the hydraulic rod (7) to move downwards. The hydraulic rod (7) drives the pressure table (6) to descend smoothly and vertically along the four guide rods (5). The cooperation between the guide rods and the guide sleeves ensures the accuracy and stability of the movement trajectory. The downward movement of the pressure table (6) eventually causes the mold connector (9) fixed at the bottom of the hydraulic rod to close tightly with the pressing mold (2) fixed on the worktable (1). This process forms a sealed cavity whose internal contour is defined by the flow channel. The key is that at the end of the mold closing, the nozzle (14) at the bottom of the material push assembly (12) precisely passes through the push through hole (10) in the center of the mold connector (9) and is coaxially aligned with the center inlet of the flow distance measuring component (4) at the bottom of the flow channel. This integrated "mold closing-alignment" design ensures that the material injection point is located at the geometric center of the flow channel, ensuring the axial symmetry of the subsequent flow and making the test results more reliable.

[0021] After the mold is closed and a sealed cavity is formed, an independent material pushing pneumatic mechanism is activated to apply a stable pressure to the metered material in the volume box (13). Under pressure, the material is extruded from the volume box (13) through the nozzle (14), through the pushing through hole (10), and vertically injected into the starting end of the flow channel located in the lower die (2). The material then enters the flow channel area defined by the flow distance measuring device (4). Driven by a constant injection pressure, the material begins to flow radially around the flow distance measuring device (4) in an approximately disk-like shape. The surface of the flow distance measuring device (4) is usually engraved or machined with a series of concentric arc-shaped scale lines, which are used to visually indicate the radial distance from the injection center.

[0022] The injection process ends when the material flow front stops advancing due to flow channel resistance, its own viscoelasticity, or curing reaction. After mold opening, the operator can directly observe and record the farthest arc scale line reached by the material flow front on the flow distance measuring piece (4). The radius value corresponding to this scale line is the flow distance of the quantitative material under specific pressure, specific mold temperature, and specific flow channel geometry.

[0023] Recorded flow distance is a core direct indicator for evaluating the flow properties of fiber materials. Under the same test conditions, a longer flow distance indicates better flow properties, meaning lower flow resistance or a wider process window. By comparing the flow distances of materials with different formulations, fiber contents, or processing techniques measured on the same device, their flow properties can be quantitatively compared and ranked, providing crucial data support for material development, quality control, and optimization of production process parameters.

[0024] Obviously, the above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, these obvious variations or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. An apparatus for testing the flow properties of fibrous materials, characterized in that, Includes a workbench (1), a pressing mold (2) is provided in the middle of the workbench (1), a flow groove is provided in the pressing mold (2), a flow distance measuring device (4) is provided in the flow groove, guide rods (5) are fixedly connected around the workbench (1), there are four guide rods (5), a pressure table (6) is provided on the guide rods (5), the pressure table (6) is slidably connected to the guide rods (5), a hydraulic rod (7) is provided in the middle of the pressure table (6), a hydraulic cylinder (8) is provided at the top of the hydraulic rod (7), the hydraulic rod... (7) is fixedly connected to a mold connector (9) at the bottom. The mold connector (9) has a push through hole (10) in the middle. The hydraulic cylinder (8) has a vertical groove in the middle. A material push assembly (12) is fixedly connected in the vertical groove near the worktable (1). The material push assembly (12) includes a volume box (13) and a nozzle (14). The volume box (13) is in contact with the inner wall of the vertical groove. The nozzle (14) is fixedly connected to the bottom of the volume box (13).

2. The apparatus for testing the flow properties of fiber materials according to claim 1, characterized in that, Support blocks (15) are fixedly connected to the bottom sides of the workbench (1).

3. The apparatus for testing the flow properties of fiber materials according to claim 2, characterized in that, The flow distance measuring component (4) is composed of multiple circular arcs.

4. The apparatus for testing the flow properties of fiber materials according to claim 3, characterized in that, The pressure table (6) has sliding rod holes around its perimeter, and a guide sleeve is provided inside the sliding rod holes. The guide rod (5) is sleeved inside the guide sleeve.

5. The apparatus for testing the flow properties of fiber materials according to claim 4, characterized in that, The pressure plate (6) has a hydraulic through hole in the middle, and the hydraulic rod (7) is set in the hydraulic through hole.

6. The apparatus for testing the flow properties of fiber materials according to claim 5, characterized in that, The nozzle (14) is coaxially aligned with the center of the push through hole (10) and the flow distance measuring element (4).

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