A high-throughput capsule experimental system and method for compression molding of a bonding material

Abstract

The present application relates to the technical field of material forming and performance evaluation, in particular to a kind of adhesive material compression forming high-throughput capsule type experimental system and method, the experimental system includes compression mould assembly, X-ray in-situ monitoring system and signal acquisition processing system, can realize experiment high-throughput, realize the dynamic information of the acquisition of adhesive material compression forming process non-invasively, provide intuitive image data and the automatic acquisition and processing of relevant data, significantly improve experimental efficiency, repeatability is high, improve the security of experiment;The experimental method realizes the rapid multiple adhesive material pressing experiment of automation and flow, combined with X-ray in-situ imaging technology, can capture the key data such as mechanical signal and temperature change of sample in real time, is conducive to researchers to carry out comprehensive and accurate evaluation of the mechanical properties and thermal characteristics of material, and can effectively improve the efficiency and accuracy of compression forming process, reduce the contingency of experiment, improve the repeatability, security and reliability of experiment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material forming and performance evaluation, in particular to a high-throughput capsule type experimental system and method for compression molding of adhesive materials. BACKGROUND

[0002] Compression molding of adhesive materials mainly includes unidirectional molding, bidirectional molding, cold pressing and hot pressing, which generally includes the process of placing raw materials in a mold, allowing the materials to undergo physical or chemical changes under appropriate temperature and pressure, filling the mold, and then solidifying through cooling or other means to form the final product. The environmental temperature, pressure, compression ratio, cooling time and other parameters required during the compression molding process of adhesive materials are generally obtained from a large amount of experimental data. Through the combination of pre-set parameters and process monitoring results, the performance of adhesive materials can be evaluated.

[0003] Traditional compression molding equipment for adhesive materials often has only a single molding chamber and relies on experience or pre-experimental data to set parameters such as compression rate, compression amount, and temperature to control the volume and density of the final product. However, it cannot monitor the dynamic micro changes inside the material during the compression molding process in real time, and it requires manual parameter setting and multiple experiments to obtain the best parameters for compression molding and effectively evaluate material performance, resulting in increased experimental time, low efficiency, and low repeatability. In addition, the sample temperature during the compression molding process is difficult to measure in real time due to the size of the sample, and existing thermometers cannot reflect the heat changes during the compression molding process. For some temperature or pressure sensitive materials, abnormal changes in temperature, pressure, or structure caused by mechanical friction or interactions between different components in the raw material during the compression molding process can lead to unpredictable changes in the physical and chemical properties of the material, increasing the risk of experimental operation. SUMMARY

[0004] The present application aims to overcome the shortcomings of existing technology, such as the inability to monitor the dynamic micro changes and temperature changes inside the material during the compression molding process of adhesive materials, the need for manual parameter setting and multiple experiments to obtain the best parameters, the long experimental time, the low efficiency, the low repeatability, and the increased risk of experimental operation. The present application provides a high-throughput capsule type experimental system and method for compression molding of adhesive materials.

[0005] In a first aspect, the present application provides a high-throughput capsule type experimental system for compression molding of adhesive materials, comprising:

[0006] A die assembly comprising a lower ram, an upper ram, and a compression mold, wherein a plurality of the lower rams are arranged, each of the lower rams being fitted with the compression mold, the upper ram and the lower ram being respectively provided with thermocouples, the upper ram being capable of being aligned with any of the lower rams and extending into the compression mold to form a compression cavity, and the upper ram being connected to a force sensor and a displacement monitoring mechanism;

[0007] An X-ray in-situ monitoring system, comprising an X-ray generator and an X-ray detector, capable of establishing a monitoring optical path passing through any of the compression chambers;

[0008] The signal acquisition and processing system is connected to the X-ray in-situ monitoring system, the thermocouple, the force sensor and the displacement monitoring mechanism, and is also connected to a display mechanism and an alarm mechanism.

[0009] The high-throughput capsule-type experimental system for compression molding of adhesive materials of the present invention can realize the testing of multiple samples in succession in a short period of time through the arrangement of multiple compression molds, significantly improving the experimental efficiency and having high repeatability. At the same time, by adopting an X-ray in-situ monitoring system to establish a monitoring optical path, non-invasive observation and research can be performed on any raw material sample in the compression chamber, dynamic information of the compression molding process of the adhesive material can be obtained, and structural changes inside the material can be monitored in real time, which can provide intuitive image data for the study of the material molding mechanism. At the same time, by arranging thermocouples on both the upper and lower pressure heads, and arranging a signal acquisition and processing system to perform real-time acquisition and processing of relevant data such as temperature, pressure and displacement during the compression molding process of the adhesive material, the efficiency and accuracy of the experiment can be effectively improved, and the safety of the experiment can be improved.

[0010] Preferably, the plurality of lower pressing heads are arranged on a rotating platform, the rotating platform being connected to a power mechanism connected to the signal acquisition and processing system, and the rotating platform being capable of rotating until any one of the compression chambers is located on the monitoring light path. The signal acquisition and processing system can drive the power mechanism based on relevant data collected during the experiment, automatically adjusting different compression chambers to be located on the monitoring light path, thereby enabling high-throughput experiments in the adhesive material compression molding process and avoiding the risks and time consumption of frequent loading of sample materials.

[0011] Preferably, the upper pressure head is connected to the motion shaft of the telescopic motor, and the force sensor is disposed on the motion shaft. The displacement monitoring mechanism includes a vernier magnetic ring, the side of which, away from the motion shaft, is mounted on the measuring rod of the magnetostrictive displacement sensor. The telescopic motor drives the upper pressure head to perform a compression action, and the force sensor collects pressure signals in real time. The vernier magnetic ring and the magnetostrictive displacement sensor work together to obtain real-time compression displacement, thereby achieving automated monitoring of the adhesive material compression process.

[0012] Preferably, the compression mold is provided with a heating tube, which is provided with an observation window. The observation window passes through the side wall of the heating tube, and the monitoring light path can pass through the observation window. The heating tube is connected to a temperature control mechanism, which is connected to the signal acquisition and processing system. A heat-conducting layer is provided between the heating tube and the compression mold. The heating tube is provided with a heat-insulating layer. Preheating and controllable heating are performed by the heating tube, achieving high-precision measurement and constant temperature regulation of the material temperature during the compression molding process, realizing automatic and accurate monitoring of thermal changes in the material sample, and increasing thermal conductivity by the heat-conducting layer. The heat-insulating layer confines the heat to the limited compression mold, so that the obtained temperature signal can truly reflect the temperature changes during the material compression molding process, and accurately evaluate the thermal properties of the material sample through the heat changes during the compression process.

[0013] Preferably, the compression mold is a cylindrical structure, the height of the compression mold is 10 mm, and the inner diameter of the compression mold is 2-3 mm;

[0014] When used for cold pressing, the compression mold is constructed of plastic. When used for hot pressing, it is constructed of aluminum-silicon glass. The compact structure and large specific surface area of ​​the compression mold allow for rapid heat transfer, enabling rapid preheating of the raw material sample to the desired conditions, forming a capsule-like compression mold. Furthermore, the cylindrical, tubular shape of the compression mold effectively and evenly distributes internal pressure, ensuring that the resulting pressure signal truly reflects the pressure concentrated within the raw material sample.

[0015] In a second aspect, the present invention provides a method for high-throughput capsule-type experiment by compression molding of adhesive materials, which uses the above-mentioned high-throughput capsule-type experiment system for compression molding of adhesive materials and includes the following steps:

[0016] S1. Set a compression mold on the lower pressure head and fill the compression mold with raw material samples;

[0017] S2. Adjust any compression mold to be located on the monitoring light path, and move the upper pressing head to align with the lower pressing head and contact the raw material sample;

[0018] S3, moving the upper pressing head toward the lower pressing head to press the raw material sample, obtaining relevant data of the pressing process in real time through the signal acquisition and processing system, and displaying the X-ray image;

[0019] S4. After the raw material sample is compressed in a single compression mold, the upper compression head is raised, the rotating platform is rotated, and the other compression mold is adjusted to be located on the monitoring light path;

[0020] S5, repeat S3-S4 until the compression of the raw material samples in all compression molds on the rotating platform is completed;

[0021] S6. Establish an analysis curve and / or analysis model based on the acquired pressing process related data, and output the analysis results.

[0022] The present invention provides a high-throughput capsule-type experimental method for compression molding of adhesive materials. By performing non-invasive real-time monitoring and data collection on multiple capsule-type compression molds, it realizes automated and streamlined rapid multiple adhesive material pressing experiments. Combined with X-ray in-situ imaging technology, it can capture key data such as the mechanical signals and temperature changes of the samples in real time, which is beneficial for researchers to comprehensively and accurately evaluate the mechanical and thermal properties of the materials, and can effectively improve the efficiency and accuracy of the compression molding process, reduce the randomness of the experiments, and improve the repeatability, safety and credibility of the experiments.

[0023] Preferably, in step S3, the pressing of the raw material sample includes cold pressing or hot pressing; during cold pressing, the force signal, displacement signal and temperature signal are obtained in real time through the signal acquisition and processing system, and an X-ray image is displayed; during hot pressing, the compression mold is preheated by the heating tube, and the force signal, displacement signal, temperature signal and current work signal are obtained in real time through the signal acquisition and processing system, and an X-ray image is displayed.

[0024] Preferably, during hot pressing, the signal acquisition and processing system calculates the heat change of the raw material sample based on the monitored current power signal, and the heat change ΔQ of the raw material sample satisfies: ;

[0025] Where, P t is the output power of the heating tube when the sample experiences temperature fluctuation at time t; The power of the heating tube during sample preheating is stable; t0 is the start time of pressing, t1 is the end time of pressing, and Δt is the sampling interval. The signal acquisition and processing system can monitor the temperature and heat changes in the microenvironment within the compression mold in real time.

[0026] Preferably, in step S3, before pressing, a temperature threshold is set by the signal acquisition and processing system. During the pressing process, the acquired temperature signal is compared with the temperature threshold. If the temperature exceeds the set range, the pressing process is paused and / or an alarm is issued. This achieves automatic risk warning and automatic handling during the pressing process, reducing experimental risks.

[0027] Preferably, in step S6, the analysis curve includes a stress-strain curve and a temperature-time curve, and the analysis model includes a nonlinear elastic-hysteresis model, providing accurate reference data for the evaluation of relevant material properties.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention provides a high-throughput capsule-type experimental system for compression molding of adhesive materials. By arranging multiple compression molds, multiple samples can be tested successively in a short period of time, achieving high experimental throughput, significantly improving experimental efficiency, and achieving high repeatability.

[0030] 2. This invention provides a high-throughput capsule-type experimental system for compression molding of adhesive materials. By using an in-situ X-ray monitoring system to establish a monitoring optical path, it can non-invasively observe and study any raw material sample within the compression chamber. This system can obtain dynamic information about the compression molding process of adhesive materials, monitor structural changes within the material in real time, and provide intuitive imaging data for research on the material molding mechanism.

[0031] 3. The present invention provides a high-throughput capsule-type experimental system for compression molding of adhesive materials. By installing thermocouples on both the upper and lower pressure heads and providing a signal acquisition and processing system for data acquisition and processing, the system can automatically collect and process relevant data during the compression molding process of adhesive materials, effectively improving the efficiency and accuracy of the experiment and enhancing the safety of the experiment.

[0032] 4. The present invention provides a high-throughput capsule-type experimental method for compression molding of adhesive materials. By performing non-invasive real-time monitoring and data collection on multiple capsule-type compression molds, it realizes automated and streamlined rapid multiple adhesive material compression experiments. Combined with X-ray in-situ imaging technology, it can capture key data such as the mechanical signals and temperature changes of the samples in real time, which is beneficial for researchers to comprehensively and accurately evaluate the mechanical properties and thermal characteristics of the materials, and can effectively improve the efficiency and accuracy of the compression molding process, reduce the randomness of the experiments, and improve the repeatability, safety and credibility of the experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a high-throughput capsule-type experimental system for compression molding of adhesive materials according to the present invention;

[0034] Figure 2 This is a schematic structural diagram of the downward pressure head provided on the rotating platform in Example 1;

[0035] Figure 3 Schematic diagram of the cross-sectional structure of the compression mold described in Example 1;

[0036] Figure 4 Schematic diagram of the structure of the heating tube in Example 1;

[0037] Figure 5 Schematic diagram of the combined structure of the upper pressure head and the displacement monitoring mechanism described in Example 1;

[0038] Figure 6 Schematic diagram of the experimental system structure during cold pressing in Example 1;

[0039] Figure 7 Schematic diagram of the experimental system structure during hot pressing in Example 1;

[0040] Markings in the figure:

[0041] 1-lower pressure head, 2-upper pressure head, 3-compression mold, 31-compression chamber, 4-thermocouple, 5-heating tube, 51-observation window, 6-force sensor, 71-vernier magnetic ring, 72-magnetostrictive displacement sensor, 73-moving axis, 81-X-ray generator, 82-X-ray detector, 9-rotating platform. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0043] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or positional relationship, such as "upper", "lower", "left", "right", "center", "inside", and "outside", are based on the expressions of the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the invented product / device / apparatus is placed when it is conventionally used. These terms of orientation or positional relationship are merely for the purpose of facilitating the description of the scheme of the present invention or simplifying the description of the specific embodiments to facilitate the rapid understanding of the scheme by technicians, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore should not be understood as limiting the present invention.

[0044] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present invention.

[0045] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0046] In addition, in the description of the embodiments of the present invention, "several," "plurality," and "a number" represent at least two. It can also be any number such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0047] Furthermore, in the description of the technical solution of the present invention, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welded, riveted, bolted, threaded, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communicative; they may be direct, indirect via an intermediate medium, or internally connected between two components.

[0048] Example 1

[0049] like Figure 1-Figure 7 As shown, a high-throughput capsule-type experimental system for compression molding of adhesive materials includes a compression mold assembly, an X-ray in-situ monitoring system and a signal acquisition and processing system. The compression mold assembly includes a lower pressure head 1, an upper pressure head 2 and a compression mold 3. Several lower pressure heads 1 are arranged, and each lower pressure head 1 is equipped with a compression mold 3. The upper pressure head 2 is connected to the motion shaft 73 of the telescopic motor. The motion shaft 73 is connected to the force sensor 6 and the displacement monitoring mechanism. The upper pressure head 2 can be aligned with any lower pressure head 1 and extend into the corresponding compression mold 3. The upper pressure head 2, the lower pressure head 1 and the compression mold 3 enclose a compression mold. The compression cavity 31, the X-ray in-situ monitoring system includes an X-ray generator and an X-ray detector. A monitoring light path can be established between the X-ray generator and the X-ray detector to pass through any compression cavity 31. The upper pressure head 2 and the lower pressure head 1 are respectively provided with a thermocouple 4. The X-ray in-situ monitoring system, the thermocouple 4, the force sensor 6 and the displacement monitoring mechanism are respectively connected to the signal acquisition and processing system. The signal acquisition and processing system realizes the real-time acquisition of relevant data during the pressing process of the bonding material, and displays and alarms are processed through the display mechanism and alarm mechanism connected to the signal acquisition and processing system.

[0050] In one or more embodiments, multiple rams 1 are arranged, each housing a compression mold 3. Relative movement between the ram 1 and the in-situ X-ray monitoring system allows any compression cavity 31 to be aligned with the monitoring light path. Material samples within multiple compression molds 3 are compressed and molded under the same or similar experimental conditions, ensuring consistency and repeatability of the experimental conditions.

[0051] In an optional embodiment, multiple pressure heads 1 can be arranged in a straight line at intervals on the work surface, and the X-ray generator and the X-ray detector are respectively arranged on both sides of the work surface, and a monitoring light path perpendicular to the arrangement direction of the multiple pressure heads 1 is established. By moving the work surface, or moving the position of the X-ray in-situ monitoring system, the monitoring light path can be matched with any compression chamber 31.

[0052] In an optional embodiment, an odd number of lower pressure heads 1 may be arranged in a ring on a rotating platform 9, the rotating platform 9 is connected to a power mechanism, the power mechanism is connected to a signal acquisition and processing system, the X-ray generator and the X-ray detector are arranged on both sides of the rotating platform 9, and a monitoring light path passing through the center of the rotating platform 9 is established. The rotating platform 9 is driven to rotate by the power mechanism, and any monitoring cavity can be adjusted to match the monitoring light path. In this embodiment, the signal acquisition and processing system can be used to drive the power mechanism to operate according to relevant data collected during the experimental process, and automatically adjust different compression cavities 31 to be located on the monitoring light path and ensure that the monitoring light path passes through the center of the compression cavity 31.

[0053] In an optional embodiment, the power mechanism may be an electric motor.

[0054] Specifically, such as Figure 2 As shown, in this embodiment, seven replaceable cylindrical lower pressure heads 1 are arranged on a disc-shaped rotating platform 9. The outer diameter of the lower pressure head 1 is 3 mm, the upper surface of the lower pressure head 1 is provided with a chamfer, and the side wall is provided with a vertical slit. A miniature thermocouple 4 is embedded in the slit, and the thermocouple 4 forms an exposed temperature sensing point at the center of the top surface of the lower pressure head 1; the upper pressure head 2 is similar to the lower pressure head 1 in structure, has the same outer diameter, and is also provided with a chamfer and a thermocouple 4.

[0055] In one or more embodiments, the upper ram 2 is connected to a motion shaft 73 of a telescopic motor, and a force sensor 6 is disposed on the motion shaft 73. The displacement monitoring mechanism includes a vernier magnetic ring 71, the side of which, away from the motion shaft 73, is mounted on the measuring rod of a magnetostrictive displacement sensor 72. The telescopic motor drives the upper ram 2 to perform a compression action, and the force sensor 6 collects pressure signals in real time. The vernier magnetic ring 71 and the magnetostrictive displacement sensor 72 work together to acquire compression and displacement signals in real time, enabling automated and accurate monitoring of the adhesive material compression process.

[0056] In one or several embodiments, the compression mold 3 is a cylindrical structural part, the size of the compression cavity can meet the imaging requirements of a single beam X-ray beam and the cross-sectional area of ​​the compression mold 3 is smaller than the effective monitoring range of the force sensor 6, forming a capsule-type compression mold 3. The lower pressure head 1, the upper pressure head 2 and the compression mold 3 can all be replaced according to actual conditions to change the shape and size of the compression cavity to adapt to different sample requirements.

[0057] Specifically, due to the limited monitoring range of the X-ray beam and the force sensor 6, the inner cavity of the compression mold 3 has a small volume and is in the shape of a capsule. In terms of imaging requirements, it can ensure clear imaging of the material in the compression cavity under the X-ray in-situ monitoring system, reducing the requirements for the experimental site; at the same time, in terms of heat transfer and detection, the compression mold 3 has a small structure, a large specific surface area, and a low heat conduction path, and can form a small microenvironment in the capsule-type compression mold 3. The temperature measurement in the small microenvironment is more real-time and can quickly respond to the temperature changes of the sample itself. For hot pressing, heat can be transferred from the high-temperature area to the low-temperature area in a short time, and the heat exchange transfer is faster. Moreover, due to the small volume of the compression mold 3, the corresponding material sample has a low heat capacity, and can be quickly transferred with less energy. The raw material sample can be preheated to the required conditions quickly and significantly. For cold pressing, the heat change during the pressing process can also be calculated through the temperature data fed back by the thermocouple 4. At the same time, in terms of pressure monitoring, the cylindrical compression chamber has a small diameter, which can effectively transmit the compression force evenly, so that the obtained pressure signal can truly reflect the pressure situation concentrated on the raw material sample, and the density of each part of the sample after compression molding is more uniform. In addition, the capsule-type compression mold 3 is small in size, and the compression mold 3 can also tightly wrap the sample, ensuring the effective use of the material, reducing the possibility of edge effect and material overflow, and reducing material waste. For materials with explosion risks or other toxic and harmful materials, the compression experiment of small-volume samples is safer, and even if an accident occurs, it will not cause serious damage.

[0058] Preferably, the compression mold 3 has a height of 10 mm and an inner diameter of 2-3 mm. The size of the compression mold 3 can be adjusted in a similar proportion according to actual conditions.

[0059] Specifically, such as Figure 3 As shown, the compression mold 3 is cylindrical, and its inner diameter matches the upper punch 2 and the lower punch 1. Chamfers are provided at the upper and lower ends of the inner cavity of the compression mold 3 to facilitate the insertion of the upper punch 2 and the lower punch 1. The material and thickness of the compression mold 3 are selected according to the performance of the material sample and whether it is heated. According to actual conditions, when the inner diameter of the compression mold 3 is small, its compressive strength can be increased by increasing the wall thickness of the compression mold 3.

[0060] In an optional embodiment, when the compression mold 3 is used for cold pressing of the material, since no heating is required, the compression mold 3 can be a plastic material structural part, and a plastic mold such as PI, PEEK, etc. can be used. The advantage of the poor thermal conductivity of the compression mold 3 of the plastic material structural part is utilized, so that the temperature signal monitored by the thermocouple 4 can better reflect the actual temperature of the material sample, and is conducive to X-ray penetration, which can well meet the needs of in-situ imaging. At the same time, the strength is good, and the breaking strength can reach 70-120 Mpa, which can withstand the compression strength of most adhesive materials.

[0061] In an optional embodiment, when the compression mold 3 is used for hot pressing of materials, the compression mold 3 is preferably an aluminum-silicon glass structure, which can be a prestressed aluminum-silicon glass tube or a chemically strengthened high-performance aluminum-silicon glass tube. The aluminum-silicon glass tube has the advantages of high temperature resistance, low thermal expansion, relatively good thermal conductivity, easy penetration of X-rays, and negligible refraction effect of X-rays. It can well meet the needs of in-situ imaging and improve the accuracy of experimental results.

[0062] In one or more embodiments, to accommodate the compression of material samples requiring preheating, a heating tube 5 is disposed outside the compression mold 3. The heating tube 5 is provided with an observation window 51 that extends through the sidewall of the heating tube 5, allowing a monitoring light path to pass through the observation window 51. The heating tube 5 is connected to a temperature control mechanism that is connected to a signal acquisition and processing system. A heat-conducting layer is provided between the heating tube 5 and the compression mold 3. An insulating layer is provided outside the heating tube 5. Preheating and controlled heating by the heating tube 5 enable high-precision measurement and constant temperature regulation of the material temperature during the compression molding process, enabling automatic and accurate monitoring of thermal changes in the material sample. The heat-conducting layer increases thermal conductivity, while the insulating layer confines heat within the limited compression mold 3, ensuring that the obtained temperature signal truly reflects the temperature changes during the material compression molding process.

[0063] In an optional embodiment, if Figure 4 As shown, the heating tube 5 can adopt a copper core constant temperature heating tube 5, and an elliptical observation window 51 is provided at the center of the heating tube 5. The observation window 51 corresponds to the compression cavity 31 in the compression mold 3 to facilitate the passage of the X-ray monitoring light path. At the same time, a heat-conducting layer formed by thermal silicone grease is provided between the compression mold 3 and the heating tube 5 to ensure that the heating tube 5 and the compression mold 3 are tightly fitted, which can not only increase the thermal conductivity, but also increase the overall compressive strength of the compression mold 3 through the heating tube 5. At the same time, the outside of the heating tube 5 is provided with insulation material by means of high-temperature resistant aluminum foil tape, so that the insulation material is coated on the outside of the compression mold 3, and the heat is limited to the compression mold 3, further improving the accuracy of the experimental collection data.

[0064] In an optional embodiment, the insulation material may be asbestos.

[0065] A high-throughput capsule-type experimental system for compression molding of adhesive materials in this embodiment can realize the testing of multiple samples in succession in a short period of time through the arrangement of multiple compression molds 3, thereby achieving high experimental throughput, significantly improving experimental efficiency, and having high repeatability. It is suitable for application scenarios where samples are frequently replaced, thereby improving the throughput of the experiment. At the same time, by adopting an X-ray in-situ monitoring system to establish a monitoring optical path, non-invasive observation and research can be performed on the raw material samples in any compression chamber 31, thereby obtaining dynamic information of the compression molding process of the adhesive material, monitoring the structural changes inside the material in real time, and providing intuitive image data for the study of the material molding mechanism. At the same time, by arranging thermocouples 4 on both the upper pressure head 2 and the lower pressure head 1, and arranging a signal acquisition and processing system for data acquisition and processing, automatic collection and processing of relevant data in the compression molding process of the adhesive material can be realized, thereby effectively improving the efficiency and accuracy of the experiment and improving the safety of the experiment.

[0066] Compared with the existing experimental process that requires multiple repetitions, the high-throughput capsule-type experimental system for compression molding of adhesive materials in this embodiment needs multiple manual sample replacement operations, which affects the experimental efficiency and increases the experimental risk. It avoids the time-consuming and labor-intensive manual operations such as replacing material samples, preheating the compression mold 3, and adjusting the X-ray position, and avoids the risk of radiation exposure for operators, thereby improving the experimental efficiency and safety. It can be applied to certain materials with flammable and explosive properties, such as PBX and other polymer bonded explosives, and can accurately control the pressure applied to such temperature- or pressure-sensitive special materials during the compression molding process, avoiding the experimental risks caused by excessive pressure and sudden pressure changes leading to local temperature increases. Applied to the compression molding process of adhesives such as HTPB and pharmaceutical powders, such as vitamin C and penicillin tablet preparations, the system can precisely control the temperature changes of these extremely temperature-sensitive materials during the compression process, avoiding unpredictable changes in the physical and chemical properties of these materials due to abnormal changes in temperature, pressure, or structure caused by sudden changes in pressure, increased mechanical friction, or interactions between different components in the raw materials. A high-throughput capsule-type experimental system for compression molding of adhesive materials in this embodiment can effectively monitor and control various parameters during the compression molding process, and cooperate with X-ray in situ imaging technology to understand the dynamic behavior of the material and monitor potential risks, while also taking into account experimental efficiency, improving experimental safety, and repeatability.

[0067] Example 2

[0068] A high-throughput capsule-type experimental method for compression molding of adhesive materials adopts a high-throughput capsule-type experimental system for compression molding of adhesive materials in Example 1 and includes the following specific steps S1-S6.

[0069] S1. Set a compression mold 3 on the lower pressure head 1, fill the compression mold 3 with raw material samples, and ensure that the material is filled evenly.

[0070] S2. Adjust any compression mold 3 to be located on the monitoring light path, move the upper pressing head 2 to be aligned with the lower pressing head 1 and to contact the raw material sample. At this time, the experimental system is in a ready state.

[0071] Specifically, it also includes preheating the X-ray generator to put the X-ray in-situ monitoring system in a ready state.

[0072] S3. Move the upper pressing head 2 toward the lower pressing head 1 to press the raw material sample. The pressing process-related data is acquired in real time through the signal acquisition and processing system, and an X-ray image is displayed.

[0073] In an optional embodiment, in step S3, when the raw material sample is cold pressed, the force signal, displacement signal and temperature signal are acquired in real time by the signal acquisition and processing system, and an X-ray image is displayed.

[0074] In an optional embodiment, in step S3, when hot pressing the raw material sample, the compression mold 3 is preheated by the heating tube 5. After the preheating is completed, the experimental system is in a preparatory state before pressing. After the experiment is officially started, the telescopic motor is controlled to compress through the signal acquisition and processing system, and the force signal, displacement signal, temperature signal and current work signal of the heating tube 5 are obtained in real time, and the X-ray image is transmitted back for display.

[0075] S4. After the compression of the raw material sample in a single compression mold 3 is completed, the upper compression head 2 is lifted, the rotating platform 9 is rotated, and the other compression mold 3 is adjusted to be located on the monitoring light path.

[0076] S5. Repeat S3-S4 until the compression of the raw material samples in all compression molds 3 on the rotating platform 9 is completed.

[0077] S6. Establish an analysis curve and / or analysis model based on the acquired pressing process related data, and output the analysis results.

[0078] The high-throughput capsule type experimental method of the adhesive material compression forming of the embodiment is characterized in that the temperature data of the thermocouple 4, the force value of the force sensor 6, the displacement signal of the displacement monitoring mechanism and the feedback signal of the power mechanism are collected by the signal acquisition and processing system, the signals are preprocessed by the circuit and transmitted to the corresponding computer loaded with algorithm software through the Ethernet, the accurate control of the power mechanism is realized, the rotation angle of the rotating platform 9 is controlled, the stress-strain analysis, the drawing and display of the temperature-time curve, the identification and real-time alarm of the potential high-temperature risk, the display of the image data captured by the X-ray detector, the storage according to the preset sampling frequency after the decoding processing, the accurate control and monitoring of the pressing rate, the compression ratio, the temperature, the heat change, the pressure and the change rate and other key parameters during the pressing forming of the raw material sample, the one-way cold pressing or hot pressing according to the material properties, the real-time output of the stress-strain curve, the evaluation of the mechanical behavior of the material during the pressing process, the formation of the standardized and repeatable high-throughput experimental process, the one-time processing of multiple samples, the rapid switching of the samples, the consistency of the pressure, the temperature and other environmental factors of each compression cavity and the improvement of the repeatability of the experimental results and the reliability of the data.

[0079] In one or several embodiments, compared with the size of the material sample of the conventional adhesive material pressing forming, the heat change is difficult to measure, and the defect that the heat change during the material pressing process cannot be reflected. In the embodiment, the heat change of the raw material sample is calculated by the signal acquisition and processing system according to the monitored current power signal during the hot pressing.

[0080] In an optional embodiment, the heat change ΔQ of the raw material sample satisfies: ;

[0081] In the formula, Pt is the output power of the heating tube 5 when the sample has a temperature fluctuation at time t; P0 is the electric power of the heating tube 5 when the sample is preheated and stabilized; t0 is the starting time of pressing, t1 is the ending time of pressing, and Δt is the sampling time interval. The temperature change and the heat change of the small environment in the compression mold 3 can be monitored in real time by the signal acquisition and processing system.

[0082] Specifically, after the preheating is completed, the heat inside and outside the compression mold 3 is balanced, and the electric power of the heating tube 5 at this time is recorded as P0; after the pressing is started, at time t, the sample changes the heat due to the change of the physicochemical properties, mechanical energy release and other factors, and the temperature of the material sample fluctuates, at this time, the output power of the heating tube 5 is P t By comparing P0 and P t , the thermal performance of the material during the pressing process can be obtained, that is, if P t >P0, the material sample absorbs heat, and vice versa; after the pressing is completed, the heat is balanced again, and the recorded multiple P tThe heat change of the material sample during the entire pressing process can be obtained by measuring the value.

[0083] In one or more embodiments, in step S3, a temperature threshold is set by the signal acquisition and processing system before pressing. During the pressing process, the acquired temperature signal is compared with the temperature threshold. If the temperature exceeds the set range, the pressing process is paused and / or an alarm is issued. This enables automatic risk warning and disposal during the pressing process, thereby reducing experimental risks.

[0084] In one or more embodiments, in step S6, the analysis curves include stress-strain curves and temperature-time curves, and the analysis model includes a nonlinear elastic-hysteresis model, providing accurate reference data for the evaluation of relevant material properties.

[0085] The present embodiment provides a high-throughput capsule-type experimental method for compression molding of adhesive materials. By performing non-invasive real-time monitoring and data collection on multiple capsule-type compression molds 3, automated and streamlined rapid multiple adhesive material pressing experiments are achieved. Combined with X-ray in-situ imaging technology, key data such as the mechanical signals and temperature changes of the sample can be captured in real time, which is beneficial for researchers to comprehensively and accurately evaluate the mechanical properties and thermal characteristics of the material, and can effectively improve the efficiency and accuracy of the compression molding process, reduce the randomness of the experiment, and improve the repeatability, safety and credibility of the experiment.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-throughput capsule-type experimental system for compression molding of adhesive materials, characterized in that: include: A die assembly comprises a lower die (1), an upper die (2) and a compression die (3), wherein a plurality of the lower die (1) are arranged, and each of the lower die (1) is provided with a compression die (3), and the upper die (2) and the lower die (1) are respectively provided with a thermocouple (4), and the upper die (2) can be aligned with any one of the lower die (1) and extend into the compression die (3) to form a compression cavity (31), and the upper die (2) is connected to a force sensor (6) and a displacement monitoring mechanism; An X-ray in-situ monitoring system, comprising an X-ray generator and an X-ray detector, capable of establishing a monitoring light path passing through any one of the compression chambers (31); A signal acquisition and processing system is connected to the X-ray in-situ monitoring system, the thermocouple (4), the force sensor (6) and the displacement monitoring mechanism, and is also connected to a display mechanism and an alarm mechanism.

2. The high-throughput capsule-type experimental system for compression molding of adhesive materials according to claim 1, characterized in that: A plurality of the lower pressure heads (1) are arranged on a rotating platform (9), the rotating platform (9) is connected to a power mechanism, the power mechanism is connected to the signal acquisition and processing system, and the rotating platform (9) can be rotated to any one of the compression chambers (31) located on the monitoring optical path.

3. The high-throughput capsule-type experimental system for compression molding of adhesive materials according to claim 1, characterized in that: The upper pressure head (2) is connected to the moving shaft (73) of the telescopic motor, and the force sensor (6) is arranged on the moving shaft (73); the displacement monitoring mechanism includes a vernier magnetic ring (71), and the side of the vernier magnetic ring (71) away from the moving shaft (73) is sleeved on the measuring rod of the magnetostrictive displacement sensor (72).

4. The high-throughput capsule-type experimental system for compression molding of adhesive materials according to claim 3, characterized in that: The compression mold (3) is provided with a heating tube (5) on its outer shell, and the heating tube (5) is provided with an observation window (51), the observation window (51) passes through the side wall of the heating tube (5), and the monitoring light path can pass through the observation window (51); the heating tube (5) is connected to a temperature control mechanism, and the temperature control mechanism is connected to the signal acquisition and processing system; a heat-conducting layer is provided between the heating tube (5) and the compression mold (3); and a heat-insulating layer is provided outside the heating tube (5).

5. A high-throughput capsule-type experimental system for compression molding of adhesive materials according to any one of claims 1 to 4, characterized in that: The compression mold (3) is a cylindrical structural member, the height of the compression mold (3) is 10 mm, and the inner diameter of the compression mold (3) is 2-3 mm; When the compression mold (3) is used for cold pressing of materials, the compression mold (3) is a plastic structural member; when the compression mold (3) is used for hot pressing of materials, the compression mold (3) is an aluminum silicon glass structural member.

6. A high-throughput capsule-type experimental method for compression molding of adhesive materials, characterized in that: A high-throughput capsule-type experimental system is formed by compression molding a bonding material according to any one of claims 1 to 5, and comprises the following steps: S1. A compression mold (3) is placed on the lower pressure head (1), and a raw material sample is filled into the compression mold (3); S2. Adjust any compression mold (3) to be located on the monitoring light path, and move the upper pressing head (2) to be aligned with the lower pressing head (1) and in contact with the raw material sample; S3, moving the upper pressing head (2) toward the lower pressing head (1) to press the raw material sample, obtaining relevant data of the pressing process in real time through the signal acquisition and processing system, and displaying the X-ray image; S4. After the raw material sample is compressed in a single compression mold (3), the upper compression head (2) is raised, the rotating platform (9) is rotated, and the other compression mold (3) is adjusted to be located on the monitoring light path; S5, repeat S3-S4 until the compression of the raw material samples in all compression molds (3) on the rotating platform (9) is completed; S6. Establish an analysis curve and / or analysis model based on the acquired pressing process related data, and output the analysis results.

7. A high-throughput capsule-type experimental method for compression molding of adhesive materials according to claim 6, characterized in that: In step S3, the pressing of the raw material sample includes cold pressing or hot pressing; during cold pressing, the force signal, displacement signal and temperature signal are acquired in real time by the signal acquisition and processing system, and an X-ray image is displayed; during hot pressing, the compression mold (3) is preheated by the heating tube (5), and the force signal, displacement signal, temperature signal and current work signal are acquired in real time by the signal acquisition and processing system, and an X-ray image is displayed.

8. A high-throughput capsule-type experimental method for compression molding of adhesive materials according to claim 7, characterized in that: During hot pressing, the signal acquisition and processing system calculates the heat change of the raw material sample based on the monitored current power signal. The heat change ΔQ of the raw material sample satisfies: ; Where, P t is the output power of the heating tube (5) when the sample temperature fluctuates at time t; P0 is the electric power of the heating tube (5) when the sample is preheated and stabilized; t0 is the pressing start time, t1 is the pressing end time, and Δt is the sampling time interval.

9. A high-throughput capsule-type experimental method for compression molding of adhesive materials according to any one of claims 6 to 8, characterized in that: In step S3, before pressing, a temperature threshold is set by the signal acquisition and processing system; during the pressing process, the acquired temperature signal is compared with the temperature threshold, and when it exceeds the set range, the pressing process is paused and / or an alarm is issued.

10. A high-throughput capsule-type experimental method for compression molding of adhesive materials according to any one of claims 6 to 8, characterized in that: In step S6, the analysis curve includes a stress-strain curve and a temperature-time curve, and the analysis model includes a nonlinear elastic-hysteresis model.

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