CN219224500U - Permeability test platform - Google Patents
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- CN219224500U CN219224500U CN202223026741.6U CN202223026741U CN219224500U CN 219224500 U CN219224500 U CN 219224500U CN 202223026741 U CN202223026741 U CN 202223026741U CN 219224500 U CN219224500 U CN 219224500U
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- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 230000035699 permeability Effects 0.000 title claims abstract description 45
- 239000003292 glue Substances 0.000 claims abstract description 103
- 238000002347 injection Methods 0.000 claims abstract description 102
- 239000007924 injection Substances 0.000 claims abstract description 102
- 238000000034 method Methods 0.000 claims abstract description 46
- 230000008569 process Effects 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000012085 test solution Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
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- 238000000605 extraction Methods 0.000 claims description 20
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- 238000005520 cutting process Methods 0.000 description 4
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
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- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 description 1
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model discloses a permeability test platform, which comprises a die, a test solution, a vacuum unit, a glue injection unit, a fluorescence information acquisition unit, a vacuum sealing unit and a control unit, wherein a fiber fabric to be tested is placed in the die, the die is connected with the glue injection unit through a glue injection port, the test solution added with a fluorescent agent is injected into the die, the die is connected with the vacuum unit through a suction port, and the time for the test solution to flow through a corresponding observation port is obtained by the fluorescence information acquisition unit; the application designs different vacuum sealing units aiming at different forming processes, so that the test platform can be simultaneously applied to detection of fiber permeability and compaction characteristics of a VARI forming process and an RTM forming process.
Description
Technical Field
The utility model relates to a permeability testing device, in particular to a platform for testing the permeability of a fiber fabric in the three-dimensional direction under different process conditions.
Background
Permeability is a physical parameter that describes the resistance of a fabric or reinforcement to resin flow and can be used to characterize the ease of resin flow through a fibrous fabric. In the liquid forming process (Liquid Composite Molding, LCM), reinforcement permeability is an important process parameter that directly affects the resin flow process and wetting effect in the fiber, thus determining the final part performance, while one key parameter of computer simulation is reinforcement permeability, the accuracy of which also determines simulation accuracy and reliability; the compaction characteristic is another important process parameter in LCM process, it is related to the compaction force, the number of fabric layers and the weaving mode, it has important influence on the mechanical properties of the composite material after the molding, for the LCM process mainly used at present, the vacuum assisted molding process (Vacuum Assisted Resin Infusion, VARI) and the resin transfer molding process (Resin Transfer Molding, RTM) are used, the whole fabric is subjected to bag pressure, the glue injection pressure can be regarded as one atmosphere, and the RTM molding process is performed, the fabric is subjected to mould pressure, the fiber volume fraction is different from the bag pressure, and the glue injection pressure is usually adjusted according to different conditions, so that the compaction characteristic and permeability of the same fabric are different under different process conditions.
The prior patent 200710099160.6 'within the fiber laying surface', 201210301604.0 'a fiber fabric thickness direction' and 201710132967.9 'a method and a system for measuring the permeability in the fiber fabric surface', although the related method for measuring the permeability in the fiber fabric surface is disclosed, the technical scheme disclosed in the prior art cannot be simultaneously applied to the requirements of a VARI process and an RTM process on the measurement of the three-dimensional permeability data of the corresponding fabric, and the operation is complex.
Disclosure of Invention
In order to solve the defects in the prior art, the application provides a permeability test platform which not only can be suitable for measuring the three-dimensional permeability of the fiber fabric used in a VARI forming process, but also can measure the three-dimensional permeability data of the fiber fabric under the action of a certain compaction force in an RTM forming process; can provide integrated solutions of fiber permeability, compaction characteristics and the like under different liquid forming processes.
The technical scheme adopted by the utility model is as follows:
a permeability testing platform, comprising:
the mold is internally provided with a sample placing groove, and the center of the sample placing groove is provided with a glue injection port; two groups of visual observation ports are arranged along the orthogonal direction by taking the glue injection port as the center; an extraction opening is arranged at the edge of the sample placing groove;
a test solution having a known viscosity and a fluorescent agent added;
the vacuum unit is connected with the air extraction opening;
the glue injection unit is connected with the glue injection port;
the fluorescent information acquisition unit comprises a plurality of fluorescent probes, a part of the fluorescent probes are arranged at the bottom of the die and correspond to the visible observation ports one by one, and one fluorescent probe is arranged at the upper part of the die and opposite to the glue injection port at the center of the die;
the vacuum sealing unit is arranged on the die and is used for vacuumizing the die;
the control unit is respectively connected with the vacuumizing unit, the glue injection unit and the fluorescence information acquisition unit in a signal way.
Further, under the VARI molding process, the vacuum sealing unit includes a sealing rubber strip and a vacuum bag, and seals the mold.
Further, under the RTM forming process, the vacuum sealing unit comprises a die pressing plate and a sealing piece arranged between the die pressing plate and the die, and the die pressing plate is detachably connected with the die; the mold is sealed by closing the mold.
Further, the distance between the die pressing plate and the die is adjusted, and the pressure in the sample placing groove is adjusted; and the die pressing plate is provided with a plurality of pressure sensors which are connected with the control unit through signals.
Further, an upper observation port is formed in the die pressing plate, and the upper observation port is opposite to the glue injection port.
Further, a sealing groove is formed at the contact position of the die pressing plate and the die, and a sealing strip is installed in the sealing groove.
Further, at least 4 extraction openings are provided and arranged in an array at the edge of the sample placement groove.
Further, the vacuumizing unit comprises a vacuum tube and a vacuum pump, and the vacuum pump is connected with the vacuumizing hole through the vacuum tube.
Further, under the VARI forming process, the glue injection unit comprises a glue injection pipe and a test liquid storage unit, one end of the glue injection pipe is connected with a glue injection port, and the other end extends to the test liquid storage unit; and the glue injection pipe is provided with a glue injection valve.
Further, under the RTM forming process, the glue injection unit comprises a glue injection pipe and a glue injection machine, wherein one end of the glue injection pipe is connected with a glue injection port, and the other end of the glue injection pipe is connected with the glue injection machine; and the glue injection pipe is provided with a glue injection valve.
The utility model has the beneficial effects that:
1. according to the permeability test platform, the visual observation port is formed in the die, and the fluorescent probe/pressure sensor is used for detecting the time and pressure of the test solution flowing through the corresponding position and other related information, so that the three-dimensional permeability of the fiber fabric can be obtained rapidly based on the obtained information.
2. The test platform can be simultaneously suitable for detection of fiber permeability and compaction characteristics of a VARI forming process and an RTM forming process by changing different vacuum sealing units. Especially when detecting the RTM forming process, the distance between the die pressing plate and the die can be changed through the adjusting bolt, the pressure in the sample placing groove is adjusted, and the pressure born by the fabric is further adjusted, so that the fabric permeability data with different volume fractions under different pressures can be tested; the test range of the whole test platform is improved.
3. By adopting the test platform, the test method is simpler, and the test platform is easy to manufacture and convenient to operate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present test platform suitable for use in a VARI process;
FIG. 2 is a schematic cross-sectional view of a test platform suitable for use in a VARI process;
FIG. 3 is a schematic diagram of the overall structure of a test platform suitable for use in an RTM process;
FIG. 4 is a schematic cross-sectional view of a test platform suitable for use in an RTM process;
in the figure, 1, a mold, 101, a glue injection port, 102, a first air extraction port, 103, a second air extraction port, 104, a third air extraction port, 105, a fourth air extraction port, 106, a visual observation port, 107, a sample placing groove, 2, a mold pressing plate, 201, an adjusting bolt, 202, a sealing groove, 203, an upper observation port, 3, a support, 4, a pressure sensor, 5, a fluorescent probe, 6, a computer, 7, a test liquid storage unit, 701, a first glue injection pipe, 702, a second glue injection valve, 703, a signal wire, 8, a waste liquid collection tank, 801, a first vacuum pipe, 802, a second vacuum pipe, 9, a vacuum pump, 10, a glue injection machine, 1001, a second glue injection pipe, 1002 and a second glue injection valve.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The utility model provides a permeability test platform, this test platform include mould 1, test solution, evacuation unit, injecting glue unit, fluorescence information acquisition unit, vacuum sealing unit and control unit. With reference to fig. 1-4, each unit structure of the test platform is as follows:
the upper surface of the die 1 is provided with a sample placing groove 107, and the sample placing groove 107 is used for placing/laying samples; a glue injection port 101 is provided at the center of the sample placement groove 107, and a test solution is injected into the sample placement groove 107 through the glue injection port 101. With the glue injection port 101 as an origin, establishing a rectangular coordinate system on the surface of the sample placing groove 107 to be marked as an x axis and a y axis, and respectively arranging a row of visual observation ports 106 on the x axis and the y axis; the visual inspection ports 106 in each column are equally spaced. The edges of the sample placement groove 107 are provided with air extraction openings, as shown in the figure, the four corners of the sample placement groove 107 are provided with a first air extraction opening 102, a second air extraction opening 103, a third air extraction opening 104 and a fourth air extraction opening 105 respectively.
The vacuum unit comprises a vacuum tube, a waste liquid collection tank 8 and a vacuum pump 9, wherein the vacuum tube is provided with two first vacuum tubes 801 and second vacuum tubes 802 respectively. One end of the first vacuum tube 801 may be of a multi-head design, and is connected with the first air extraction opening 102, the second air extraction opening 103, the third air extraction opening 104 and the fourth air extraction opening 105 respectively, and a rubber ring is used to ensure sealing, and ensure that the plane of the first vacuum tube is flush with the inner surface of the die 1; the other end of the first vacuum tube 801 and one end of the second vacuum tube 802 are both arranged in the waste liquid collection tank 8, and the other end of the second vacuum tube 802 is connected with the vacuum pump 9.
The glue injection unit is used for injecting glue into the sample placing groove 107, and certain differences exist in the structure of the glue injection unit according to different forming processes. Specifically, when the VARI molding process is aimed, the glue injection unit is shown in fig. 2, and includes a test liquid storage unit 7, a first glue injection pipe 701, and a first glue injection valve 702 on the first glue injection pipe 701; one end of the first glue injection pipe 701 is connected with the glue injection port 101 to ensure the air tightness of the connection, and the other end is arranged in the test liquid storage unit 7, and the test liquid storage unit 7 is filled with test solution. When the RTM molding process is performed, the glue injection unit is shown in FIG. 4, and comprises a glue injection machine 10, a second glue injection tube 1001 and a second glue injection valve 1002 on the second glue injection tube 1001, wherein one end of the second glue injection tube 1001 is connected with the glue injection port 101 to ensure connection air tightness, the other end is connected with the glue injection machine 10, a test solution is filled in the glue injection machine 10, and the test solution is injected into the sample placing groove 107 by the glue injection machine 10.
The test solution used in this embodiment is a solution with known viscosity and added with fluorescent agent, and the common known viscosity solution can be selected from simethicone, corn syrup and water mixed solution, edible oil, unsaturated polyester, etc., and the common fluorescent agent can be selected from fluorescent whitening agent JD-3, fluorescent whitening agent near 31 # And fluorescent whitening agents EBF, etc.
The fluorescence information acquisition unit comprises a plurality of fluorescence probes 5, a part of the fluorescence probes 5 are arranged at the bottom of the die and correspond to the visual observation ports 106 one by one, one fluorescence probe 5 is arranged at the upper part of the die and opposite to the glue injection port 101 at the center of the die, and fluorescence information is acquired by using the fluorescence probes 5 so as to obtain the time of a test solution flowing through the corresponding observation port. In order to facilitate the installation and positioning of the fluorescent probe 5, the application also designs a bracket 3 for the installation of the fluorescent probe 5 and the die 1, wherein the bracket 3 comprises a vertical part and a horizontal part, and the bracket of the vertical part is used for supporting the die 1 and is fixedly connected with the bottom of the die 1; the holder of the horizontal part is used for fixing the fluorescent probe 5.
The vacuum sealing units are different when aiming at different forming processes, and specifically: the vacuum sealing unit comprises a sealing rubber strip and a vacuum bag for sealing the die 1 in the VARI forming process. For the RTM molding process, the vacuum sealing unit includes a mold platen 2, a seal provided between the mold platen 2 and the mold 1. The die pressing plate 2 is detachably connected with the die 1 through an adjusting bolt 201, a sealing groove 202 is formed at the contact position of the die pressing plate 2 and the die 1, sealing strips with different sizes are installed in the sealing groove 202 to ensure sealing, and fabrics with different thicknesses are adapted. The design can also change the connection distance between the die pressing plate 2 and the die 1 through the adjusting bolts 201, adjust the pressure in the sample placing groove 107, further adjust the pressure born by the fabric, and further test the fabric permeability data with different volume fractions under different pressures. An upper observation port 203 is formed in the die pressing plate 2, and the upper observation port 203 is opposite to the glue injection port 101; the die platen 2 is provided with a plurality of pressure sensors 4 for acquiring pressure values at the respective detection points.
The control unit can be a computer 6, and the computer 6 is respectively connected with the pressure sensor 4, the fluorescent probe 5, the glue injection valve, the vacuum pump 9 and the glue injection machine 10 through signal wires; on the one hand, the information collected by the pressure sensor 4 and the fluorescent probe 5 can be obtained, and on the other hand, the starting and stopping of the work of the monitoring platform can be controlled.
In this embodiment, the visual observation port 106 may be a through hole formed in the mold 1, on which quartz glass is placed and vacuum silicone grease is used to ensure sealing performance of the quartz glass, and it is also necessary to ensure that the plane of the observation port is flush with the upper surface of the mold, and to ensure flatness of the sample placement groove 107; the quartz glass and the mold 1 are bonded and fixed by using vacuum glue at the bottom of the visual observation port 106.
The following describes the measurement process of three-dimensional permeability data of a VARI forming process and an RTM forming process by combining the detection platform, and is specifically as follows:
as shown in connection with fig. 1 and 2, for the VARI forming process:
the first step: mold preparation
Preparing a die 1, and installing the visual observation ports 106 at the bottom of the die 1 in place, wherein twenty visual observation ports 106 are counted in the design; subsequently, the mold 1 was attached to the bracket 3, the glue injection port 101 was connected to the glue injection unit, and 4 suction ports were connected to the vacuum unit.
And a second step of: test system preparation
Firstly, connecting the fluorescent probes 5 with the bracket 3, and aligning the center point of the detection port of each fluorescent probe 5 with the center of the corresponding visual observation port 106, so as to ensure that the reading can be accurately obtained; the signal output line 501 of the fluorescent probe 5 is then connected with the computer 6, the glue injection pipe 701 is connected with the glue injection port 101, the first glue injection valve 702 is connected with the first glue injection pipe 701, the signal line 703 of the first glue injection valve 702 is then connected with the computer 6, and whether the debugging signal can be detected normally or not is checked and then the next step is carried out.
And a third step of: sample preparation
And cutting the fabric sample, namely cutting the fabric sample into a size matched with the die 1, wherein the area of the sample is S, and paving the fabric sample according to a certain layering mode and the layering layer number n.
Fourth step: bag making and pre-test inspection
Placing the prepared fabric sample into a sample placing groove 107 of the mould 1, sealing the surface of the mould 1 by using a sealing rubber strip and a vacuum bag, placing a first rubber injection pipe 701 into a test liquid storage unit 7 (such as a beaker) containing a test solution, closing a first rubber injection valve 702 before formal test, checking the overall tightness, and ensuring that the pressure drop in the vacuum bag is less than 1mbar/min;
fifth step: permeability test
The test solution of 350ml is prepared before the permeability test is poured into the beaker 7, all signal transmission devices can normally transmit signals, the vacuum pump 9 is opened, the first glue injection valve 702 is opened after the vacuum degree in the bag is stabilized, and the signal line 703 starts at the time t 0 The test solution is injected into the sample placing groove 107 and starts to permeate the fabric sample under the action of atmospheric pressure, when the fabric sample permeated by the test solution flows through the visual observation port 106, the fluorescent probes 5 corresponding to the visual observation port 106 receive signals and input the signals into the computer 6, and the computer 6 records the time for each fluorescent probe 5 to acquire the corresponding visual observation port 106 respectively, and the time is recorded as follows: t is t x1 ,t x2 ,t x3 ,t x4 ,t x5 ,t -x1 ,t -x2 ,t -x3 ,t -x4 ,t -x4 ,t -x5 ,t y1 ,t y2 ,t y3 ,t y4 ,t y5 ,t -y1 ,t -y2 ,t -y3 ,t -y4 ,t -y5 . And time t for the fluorescent probe 5 at the upper part of the die 1 to detect penetration of the test solution from the bottom surface to the upper surface of the fabric sample at the glue injection port 101 z . The viscosity of the test solution and the volume fraction of the fabric fibers are then input into a computer, a three-dimensional permeability calculation program can be preset in the computer, the three-dimensional permeability calculation can be performed in a calculation mode conventionally used in the art, see ' Gao Yantao, research on fluid permeability behavior and carbon-glass fiber staggered layer structure in a VARTM process glass fiber thick layer, 2011, chinese excellent national institute paper full text database ', ' Measurement of Principle Permeabillity with Channel Flow Experiment ', ' Zhang Xuan and the like, three-dimensional fabric thickness direction permeability research, 2017, chinese adhesive and the like, and the three-dimensional permeability k is calculated on the time data, the viscosity of the test solution, the volume fraction of the fabric fibers and the like acquired by the device through a built-in calculation method of the computer x ,k y ,k z . As shown in connection with fig. 3 and 4, for the RTM molding process:
the first step: mold preparation
The mold 1 and the mold platen 2 are prepared. The structure of the die 1 is the same as that of the die 1 used in detection of the VARI forming process.
And a second step of: test system preparation
Firstly, connecting a signal output line 401 of the pressure sensor 4 with a computer 6, then connecting the fluorescent probes 5 with the bracket 3, and aligning the center point of the detection port of each fluorescent probe 5 with the center of the corresponding visual observation port 106, thereby ensuring that the reading can be accurately obtained; then the signal output line 501 of the fluorescent probe 5 is connected with the computer 6, the second glue injection tube 1001 is connected with the glue injection port 101 to ensure the connection air tightness, the second glue injection valve 1002 is connected with the second glue injection tube 1001, then the signal line 1003 of the second glue injection valve 1002 is connected with the computer 6, and whether the debugging signal can be detected normally or not is checked and then the next step is carried out;
and a third step of: sample preparation
And cutting the sample, namely cutting the sample into a size matched with the die 1, wherein the area of the sample is S, and paving according to a certain layering mode and the layering layer number n.
Fourth step: mold closing and pre-test inspection
The prepared fabric sample is placed in the sample placing groove 107 of the mold 1, then the mold 2 is placed on the mold 1, the mold pressing plate 2 and the mold 1 are detachably connected by the adjusting bolt 201, the distance between the mold pressing plate 2 and the mold 1 is changed by the adjusting bolt 201, and the pressure in the sample placing groove 107 is adjusted, so that the pressure applied to the fabric is further adjusted.
After the die assembly is completed, the pressure born by the fabric sample is determined by the pressure sensor 4, the fiber volume fraction of the current fabric can be obtained by calculation, then the second glue injection tube 1001 is connected with the glue injection machine 10, one end of the first vacuum tube 801 is respectively connected with the air extraction opening, and the other end is connected with the waste liquid collecting tank 8; one end of the second vacuum tube 802 is connected with the waste liquid collecting tank 8, the other end is connected with the vacuum pump 9, the second glue injection valve 1002 is closed before formal test, the integral tightness of the die is checked, and the pressure drop is ensured to be less than 1mbar/min;
fifth step: permeability test
350ml of test solution is prepared before permeability test and is added into the glue injection machine 10, all signal transmission devices are determined to be capable of normally reading signals, the vacuum pump 9 is opened, after the vacuum degree in the die cavity is stabilized, the second glue injection valve 1002 is opened, and at the moment, the signal line 1003 starts glue injection at the time t 0 The test solution starts to permeate the fabric after being transferred to the computer 6, when the test solution permeates the fabric and flows through the visual observation port 106, the fluorescent probe 5 receives signals, and the computer records the time of the test solution flowing through the corresponding visual observation port 106 respectively: t is t dx1 ,t dx2 ,t dx3 ,t dx4 ,t dx5 ,t -dx1 ,t -dx2 ,t -dx3 ,t -dx4 ,t -dx4 ,t -dx5 ,t dy1 ,t dy2 ,t dy3 ,t dy4 ,t dy5 ,t -dy1 ,t -dy2 ,t -dy3 ,t -dy4 ,t -dy5 And the time t for the fluorescent probe 5 at the upper part of the die 1 to detect the penetration of the test solution from the bottom surface to the upper surface of the fabric sample at the glue injection port 101 from the upper observation port 203 z When the test solution permeates the upper surface of the fabric and flows through the pressure sensor, the pressure sensor 4 receives signals, and the computer records the time t when the resin flows through the corresponding position ux1 ,t ux2 ,t ux3 ,t ux4 ,t ux5 ,t -ux1 ,t -ux2 ,t -ux3 ,t -ux4 ,t -ux4 ,t -ux5 ,t uy1 ,t uy2 ,t uy3 ,t uy4 ,t uy5 ,t -uy1 ,t -uy2 ,t -uy3 ,t -uy4 ,t -uy5 And pressure p ux1 ,p ux2 ,p ux3 ,p ux4 ,p ux5 ,p -ux1 ,p -ux2 ,p -ux3 ,p -ux4 ,p -ux4 ,p -ux5 ,p uy1 ,p uy2 ,p uy3 ,p uy4 ,p uy5 ,p -uy1 ,p -uy2 ,p -uy3 ,p -uy4 ,p -uy5 Then inputting the viscosity of the test solution into a computer, and obtaining the corresponding three-dimensional permeability k through calculation x ,k y ,k z 。
The above embodiments are merely for illustrating the design concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, the scope of the present utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications according to the principles and design ideas of the present utility model are within the scope of the present utility model.
Claims (10)
1. A permeability test platform, comprising:
the device comprises a die (1), wherein a sample placing groove (107) is formed in the die (1), and a glue injection port (101) is formed in the center of the sample placing groove (107); two groups of visual observation ports (106) are arranged along the orthogonal direction by taking the glue injection port (101) as the center; an extraction opening is arranged at the edge of the sample placing groove (107);
a test solution having a known viscosity and a fluorescent agent added;
the vacuum unit is connected with the air extraction opening;
the glue injection unit is connected with the glue injection port (101);
the fluorescent information acquisition unit comprises a plurality of fluorescent probes (5), a part of the fluorescent probes (5) are arranged at the bottom of the die and correspond to the visual observation ports (106) one by one, and one fluorescent probe (5) is arranged at the upper part of the die and opposite to the glue injection port (101) at the center of the die;
the vacuum sealing unit is arranged on the die (1) and used for enabling the inside of the die (1) to be vacuum;
the control unit is respectively connected with the vacuumizing unit, the glue injection unit and the fluorescence information acquisition unit in a signal way.
2. A permeability testing platform according to claim 1, wherein at least 4 of the extraction openings are provided and arranged in an array at the edge of the sample placement groove (107).
3. The permeability testing platform according to claim 1, wherein the vacuum pumping unit comprises a vacuum tube and a vacuum pump, the vacuum pump being connected to the pumping port via the vacuum tube.
4. A permeability testing platform according to claim 1, 2 or 3, characterized in that the vacuum sealing unit comprises a sealing strip and a vacuum bag for sealing the mould (1) under the VARI forming process.
5. The permeability test platform according to claim 4, wherein the glue injection unit comprises a glue injection pipe and a test liquid storage unit under the VARI molding process, one end of the glue injection pipe is connected with the glue injection port (101), and the other end extends to the test liquid storage unit; and the glue injection pipe is provided with a glue injection valve.
6. A permeability test platform according to claim 1, 2 or 3, characterized in that under RTM forming process, the vacuum sealing unit comprises a mould platen (2), a seal arranged between the mould platen (2) and the mould (1), the mould platen (2) and the mould (1) being detachably connected; the mold (1) is sealed by closing the mold.
7. A permeability testing platform according to claim 6, characterized in that the distance of the connection between the die platen (2) and the die (1) is adjusted, the pressure in the sample placement groove (107) is adjusted; and the die pressing plate (2) is provided with a plurality of pressure sensors (4), and the pressure sensors (4) are in signal connection with the control unit.
8. The permeability test platform according to claim 6, wherein the mold platen (2) is provided with an upper viewing port (203), and the upper viewing port (203) is in phase with the glue injection port (101).
9. The permeability test platform according to claim 6, wherein a sealing groove (202) is formed at the contact position of the die pressing plate (2) and the die (1), and a sealing strip is installed in the sealing groove (202).
10. The permeability test platform according to claim 6, wherein the glue injection unit comprises a glue injection pipe and a glue injection machine under the RTM molding process, one end of the glue injection pipe is connected with a glue injection port (101), and the other end is connected with the glue injection machine; and the glue injection pipe is provided with a glue injection valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223026741.6U CN219224500U (en) | 2022-11-15 | 2022-11-15 | Permeability test platform |
Applications Claiming Priority (1)
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