Binding material compression molding high-throughput capsule type experiment system and method

Abstract

The invention relates to the technical field of material forming and performance evaluation, in particular to a binding material compression forming high-flux capsule type experiment system and method.The experiment system comprises a pressing die assembly, an X-ray in-situ monitoring system and a signal collecting and processing system, experiment high flux can be achieved, and the experiment efficiency is improved. Dynamic information in the compression molding process of the binding material is obtained in a non-intrusive mode, visual image data and automatic collection and processing of related data are provided, the experiment efficiency is remarkably improved, repeatability is high, and the experiment safety is improved; according to the experimental method, automatic and processized rapid multi-time bonding material pressing experiments are achieved, key data such as mechanical signals and temperature changes of a sample can be captured in real time by combining the X-ray in-situ imaging technology, researchers can comprehensively and accurately evaluate the mechanical property and the thermal property of the material, and the working efficiency of the researchers is improved. And the efficiency and the accuracy of the compression molding process can be effectively improved, the contingency of an experiment is reduced, and the repeatability, the safety and the credibility of the experiment are improved.

Description

Technical Field

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

[0002] There are several major types of compression molding of bonding materials, including unidirectional molding, bidirectional molding, cold pressing and hot pressing. It usually involves placing the raw materials in a mold, causing 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 ambient temperature, pressure, compression ratio, cooling time and other parameters required in the compression molding process of bonding materials are generally obtained from a large amount of experimental data. By combining the pre-setting parameters of compression molding with the process monitoring results, the performance of the bonding material can be evaluated.

[0003] The molding equipment used for traditional compression molding of 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, temperature, etc., so as to control parameters such as the volume and density of the final product. It is impossible to monitor the dynamic microscopic changes inside the material during the compression molding process in real time. It is necessary to manually set parameters and conduct multiple experiments to obtain the optimal parameters for compression molding and achieve effective evaluation of material performance, which increases the time consumption of the experiment, is inefficient, and has low repeatability. At the same time, for the temperature of the raw material sample during the compression molding process, due to the size of the sample, the heat change of the sample is often difficult to measure in real time, and the existing thermometers cannot reflect the heat change of the material during the compression molding process. For some temperature or pressure sensitive materials, during the compression molding process, if there are abnormal changes in pressure or temperature, increased mechanical friction, or abnormal changes in temperature, pressure or structure caused by the interaction between different components in the raw materials, it may cause unpredictable changes in the physical and chemical properties of the material, thereby increasing the risk of experimental operation. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art that the dynamic microscopic changes and temperature changes inside the material cannot be monitored in real time during the compression molding process of the adhesive material, and that multiple experiments need to be manually set to obtain the optimal parameters, resulting in long experiments, low efficiency, low repeatability, and increased experimental operation risks. A high-throughput capsule experimental system and method for compression molding of adhesive materials is provided.

[0005] In a first aspect, the present invention provides a high-throughput capsule-type experimental system for compression molding of bonding materials, comprising: A die assembly, comprising a lower die, an upper die and a compression mold, wherein a plurality of the lower die are arranged, each of the lower die is provided with a compression mold, the upper die and the lower die are provided with thermocouples respectively, the upper die can be aligned with any of the lower die and extend into the compression mold to form a compression cavity, and the upper die is connected to a force sensor and a displacement monitoring mechanism; An X-ray in-situ monitoring system, including an X-ray generator and an X-ray detector, capable of establishing a monitoring optical path through any of the compression chambers; The signal acquisition and processing system is connected with the X-ray in-situ monitoring system, the thermocouple, the force sensor and the displacement monitoring mechanism, and is also connected with a display mechanism and an alarm mechanism.

[0006] A 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 time through the arrangement of multiple compression molds, significantly improve the experimental efficiency, and have 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 the 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 pressure head and the lower pressure head, 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.

[0007] Preferably, a plurality of the lower pressure heads are arranged on a rotating platform, the rotating platform is connected to a power mechanism, the power mechanism is connected to the signal acquisition and processing system, and the rotating platform can rotate to any one of the compression chambers located on the monitoring light path. The signal acquisition and processing system can drive the power mechanism to operate according to the relevant data collected during the experiment, automatically adjust different compression chambers to be located on the monitoring light path, and realize high-throughput experiments in the compression molding process of the bonding material, avoiding the risk and time consumption of frequent filling of sample materials.

[0008] Preferably, the upper pressure head is connected to the moving shaft of the telescopic motor, and the force sensor is arranged on the moving shaft; the displacement monitoring mechanism includes a vernier magnetic ring, and the side of the vernier magnetic ring away from the moving shaft is sleeved on the measuring rod of the magnetostrictive displacement sensor. The telescopic motor drives the upper pressure head to perform compression, and the force sensor collects the pressure signal in real time. The real-time acquisition of compression displacement is achieved through the cooperation of the vernier magnetic ring and the magnetostrictive displacement sensor, thereby realizing the automatic monitoring of the compression process of the bonding material.

[0009] Preferably, the compression mold is provided with a heating tube, the heating tube 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, and the temperature control mechanism is connected to the signal acquisition and processing system; a heat-conducting layer is provided between the heating tube and the compression mold; and a heat-insulating layer is provided outside the heating tube. Preheating and controllable heating are performed by the heating tube to achieve high-precision measurement and constant temperature regulation of the material temperature during the compression molding process, and automatic and accurate monitoring of the heat change of the material sample is achieved. The thermal conductivity is increased by the heat-conducting layer, and the heat is confined to a limited compression mold by the heat-insulating layer, so that the obtained temperature signal can truly reflect the temperature change of the material compression molding process, so as to accurately evaluate the thermal properties of the material sample through the heat change of the compression process.

[0010] 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; When the compression mold is used for cold pressing of materials, the compression mold is a plastic material structure; when the compression mold is used for hot pressing of materials, the compression mold is an aluminum silicon glass structure. The compression mold has a small structure, a large specific surface area, and a fast heat exchange transfer. It can quickly preheat the raw material sample to the required conditions to form a capsule-type compression mold. At the same time, the cylindrical tubular compression mold can effectively and evenly transfer the internal pressure, so that the obtained pressure signal can truly reflect the pressure situation concentrated on the raw material sample.

[0011] In a second aspect, the present invention provides a high-throughput capsule experiment method for compression molding of a bonding material, using a high-throughput capsule experiment system for compression molding of a bonding material as described above, and comprising the following steps: S1. A compression mold is set on the lower pressure head, and the raw material sample is filled in the compression mold; S2. Adjust any compression mold to be located on the monitoring light path, and move the upper pressure head to be aligned with the lower pressure head and in contact with the raw material sample; S3, moving the upper pressing head toward the lower pressing head to press the raw material sample, obtaining the pressing process related data in real time through the signal acquisition and processing system, and displaying the X-ray image; S4. After the raw material sample in a single compression mold is compressed, the upper compression head is lifted, the rotating platform is rotated, and another compression mold is adjusted to be located on the monitoring light path; S5, repeat S3-S4 until the compression of all raw material samples in the compression molds on the rotating platform is completed; S6. Establish an analysis curve and / or analysis model based on the acquired pressing process related data, and output the analysis results.

[0012] The high-throughput capsule-type experimental method for compression molding of adhesive materials of the present invention realizes automated and streamlined rapid multiple adhesive material compression experiments by performing non-invasive real-time monitoring and data collection on multiple capsule-type compression molds. Combined with X-ray in-situ imaging technology, it can capture key data such as mechanical signals and temperature changes of samples in real time, which is beneficial for researchers to comprehensively and accurately evaluate the mechanical properties and thermal properties of materials, 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.

[0013] 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 acquired in real time by the signal acquisition and processing system, and an X-ray image is displayed; during hot pressing, the compression mold is preheated by a heating tube, 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.

[0014] Preferably, during hot pressing, the signal acquisition and processing system calculates the heat change of the raw material sample according to the monitored current work signal, and the heat change ΔQ of the raw material sample satisfies: ; Where P t is the output power of the heating tube when the sample experiences temperature fluctuation at time t; is the electric power of the heating tube when the sample is preheated and stabilized; t0 is the start time of pressing, t1 is the end time of pressing, and Δt is the sampling time interval. The temperature change and heat change of the microenvironment in the compression mold can be monitored in real time through the signal acquisition and processing system.

[0015] Preferably, in step S3, before pressing, a temperature threshold is set by a signal acquisition and processing system; during the pressing process, the acquired temperature signal is compared with the temperature threshold, and when the temperature exceeds the set range, the pressing process is paused and / or an alarm is sounded. Automatic risk warning and automatic disposal of the pressing process are achieved, reducing experimental risks.

[0016] 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, so as to provide accurate reference data for the evaluation of relevant performance of the material.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a high-throughput capsule-type experimental system for compression molding of adhesive materials. Through the arrangement of multiple compression molds, multiple samples can be tested successively in a short time, achieving high-throughput experiments, significantly improving experimental efficiency, and high repeatability; 2. The present invention provides a high-throughput capsule-type experimental system for compression molding of adhesive materials. By adopting an X-ray in-situ monitoring system to establish a monitoring optical path, a non-invasive observation and study of a raw material sample in any compression chamber can be performed, and dynamic information of the compression molding process of the adhesive material can be obtained, and the 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; 3. The present invention provides a high-throughput capsule-type experimental system for compression molding of adhesive materials. By arranging thermocouples on both the upper pressure head and the lower pressure head, and arranging a signal acquisition and processing system for data acquisition and processing, the automatic acquisition 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. 4. The present invention provides a high-throughput capsule experimental method for compression molding of adhesive materials. By performing non-invasive real-time monitoring and data collection on multiple capsule compression molds, automated and streamlined rapid multiple adhesive material compression experiments are realized. Combined with X-ray in-situ imaging technology, key data such as the mechanical signals and temperature changes of the samples can be captured 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 Figure 1 It is a structural schematic diagram of a high-throughput capsule-type experimental system for compression molding of bonding materials of the present invention; Figure 2 This is a schematic diagram of the structure of the pressure head disposed on the rotating platform in Example 1; Figure 3 is a schematic cross-sectional structure diagram of the compression mold described in Example 1; Figure 4 is a schematic diagram of the structure of the heating tube described in Example 1; Figure 5 Schematic diagram of the combined structure of the upper pressure head and the displacement monitoring mechanism described in Example 1; Figure 6 This is a schematic diagram of the experimental system structure during cold pressing in Example 1; Figure 7 This is a schematic diagram of the experimental system structure during hot pressing in Example 1; Markings in the figure: 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

[0019] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0020] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, 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 position relationship, and therefore cannot be understood as a limitation on the present invention.

[0021] 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 than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., 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 scheme of the present invention.

[0022] In addition, the expressions “first”, “second”, “third”, etc., which appear 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.

[0023] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0024] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0025] Example 1 like Figure 1-Figure 7 As shown, a high-throughput capsule-type experimental system for compression molding of bonding materials includes a die assembly, an X-ray in-situ monitoring system and a signal acquisition and processing system. The die assembly includes a lower die 1, an upper die 2 and a compression mold 3. Several lower die 1 are arranged, and each lower die 1 is provided with a compression mold 3. The upper die 2 is connected to a moving shaft 73 of a telescopic motor, and the moving shaft 73 is connected to a force sensor 6 and a displacement monitoring mechanism. The upper die 2 can be aligned with any lower die 1 and extend into the corresponding compression mold 3. The upper die 2, the lower die 1 and the compression mold 3 enclose a compression mold 3. The compression chamber 31, the X-ray in-situ monitoring system includes an X-ray generator and an X-ray detector. A monitoring optical path can be established between the X-ray generator and the X-ray detector to pass through any compression chamber 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 is used to realize real-time acquisition of relevant data during the pressing process of the bonding material, and display and alarm processing are performed through the display mechanism and alarm mechanism connected to the signal acquisition and processing system.

[0026] In one or more embodiments, a plurality of lower pressing heads 1 are arranged, and a compression mold 3 is sleeved on each lower pressing head 1. By relative movement between the lower pressing head 1 and the X-ray in-situ monitoring system, any compression cavity 31 can be adjusted to the monitoring optical path. The material samples in the plurality of compression molds 3 are pressed and molded under the same or similar experimental conditions to ensure the consistency and repeatability of the experimental conditions.

[0027] In an optional embodiment, multiple pressure heads 1 may be arranged in a straight line at intervals on a work surface, and an X-ray generator and an X-ray detector may be disposed on both sides of the work surface to establish a monitoring light path perpendicular to the arrangement direction of the multiple pressure heads 1. By moving the work surface or moving the position of the X-ray in-situ monitoring system, the monitoring light path may be matched with any compression chamber 31.

[0028] In an optional embodiment, an odd number of lower pressure heads 1 may be arranged in a ring on a rotating platform 9, and the rotating platform 9 is connected to a power mechanism, which 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 experiment, 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.

[0029] In an optional embodiment, the power mechanism may be an electric motor.

[0030] Specifically, 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 vertically provided with a 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.

[0031] In one or more embodiments, 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. The upper pressure head 2 is driven by the telescopic motor to perform a compression action, and the pressure signal is collected in real time by the force sensor 6. The real-time acquisition of the compression displacement signal is realized through the cooperation of the vernier magnetic ring 71 and the magnetostrictive displacement sensor 72, so as to realize the automatic and accurate monitoring of the compression process of the bonding material.

[0032] 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 be replaced according to actual conditions to change the shape and size of the compression cavity to adapt to different sample requirements.

[0033] 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 a capsule-like feature. 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 under 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 heat capacity of the corresponding material sample is low, and it 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 compression mold 3 is small in size, and the compression mold 3 can also tightly wrap the sample to ensure the effective use of the material, reduce the possibility of edge effect and material overflow, and reduce 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 major damage.

[0034] 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.

[0035] Specifically, Figure 3 As shown, the compression mold 3 is cylindrical, and its inner diameter matches the upper and lower punches 2 and 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 and lower punches 2 and 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.

[0036] In an optional embodiment, when the compression mold 3 is used for cold pressing of materials, since heating is not required, the compression mold 3 can be a plastic material structural part, and plastic molds such as PI and PEEK can be used. The advantage of the poor thermal conductivity of the compression mold 3 made of plastic material structural parts 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 pressing strength of most adhesive materials.

[0037] 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.

[0038] In one or more embodiments, in order to meet the pressing requirements of the material sample that needs to be preheated, a heating tube 5 is provided on the outer surface of the compression mold 3, and the heating tube 5 is provided with an observation window 51, which runs 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 the 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. Preheating and controllable heating are performed by the heating tube 5, so as to realize high-precision measurement and constant temperature regulation of the material temperature during the compression molding process, realize automatic and accurate monitoring of the heat change of the material sample, increase the thermal conductivity by the heat-conducting layer, and confine the heat to the limited compression mold 3 by the heat-insulating layer, so that the obtained temperature signal can truly reflect the temperature change of the material compression molding process.

[0039] 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 arranged at the center of the heating tube 5, and 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 conductive 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, a heat-insulating material is provided on the outside of the heating tube 5 by pasting with high-temperature resistant aluminum foil tape, so that the heat-insulating material is coated on the outside of the compression mold 3, and the heat is limited to the compression mold 3, thereby further improving the accuracy of the experimental data collection.

[0040] In an optional embodiment, the thermal insulation material may be asbestos.

[0041] A high-throughput capsule-type experimental system for compression molding of adhesive materials in this embodiment can test multiple samples successively in a short period of time through the arrangement of multiple compression molds 3, thereby achieving high-throughput experiments, significantly improving experimental efficiency, and having high repeatability. It is suitable for application scenarios where samples are frequently replaced, thereby improving experimental throughput. 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 raw material samples in any compression chamber 31, thereby obtaining dynamic information on 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 molding mechanism of the material. 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 acquisition and processing of relevant data during the compression molding process of the adhesive material can be achieved, thereby effectively improving the efficiency and accuracy of the experiment, and improving the safety of the experiment.

[0042] 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 to perform manual sample replacement operations multiple times, which affects the experimental efficiency and increases the experimental risk. It avoids the time-consuming and laborious work of manually replacing material samples, preheating the compression mold 3, adjusting the X-ray position, etc., and avoids the risk of radiation exposure of 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 by 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, and can also Applied to the compression molding process of adhesives such as HTPB and drug powders such as vitamin C, penicillins and other compressed tablet preparations, the temperature changes of such materials that are extremely sensitive to temperature during the compression process can be accurately controlled to avoid unpredictable changes in the physical and chemical properties of these materials caused by 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 materials and monitor possible risks, while taking into account experimental efficiency and improving experimental safety and repeatability.

[0043] Example 2 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.

[0044] S1. A compression mold 3 is set on the lower pressure head 1, and a raw material sample is filled into the compression mold 3 to ensure that the material is filled evenly.

[0045] 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 with the raw material sample. At this time, the experimental system is in a ready state.

[0046] Specifically, it also includes preheating the X-ray generator to put the X-ray in-situ monitoring system in a ready state.

[0047] S3, moving the upper pressing head 2 towards the lower pressing head 1 to press the raw material sample, obtaining the pressing process related data in real time through the signal acquisition and processing system, and displaying the X-ray image.

[0048] 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.

[0049] 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 compressed by 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.

[0050] 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 another compression mold 3 is adjusted to be located on the monitoring light path.

[0051] S5. Repeat S3-S4 until the compression of the raw material samples in all compression molds 3 on the rotating platform 9 is completed.

[0052] S6. Establish an analysis curve and / or analysis model based on the acquired pressing process related data, and output the analysis results.

[0053] In the present embodiment, a high-throughput capsule-type experimental method for compression molding of bonding materials is used. 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. After the signals are pre-processed by the circuit, they are transmitted to the corresponding computer equipped with the algorithm software through Ethernet to realize the precise control of the power mechanism, control the rotation angle of the rotating platform 9, and perform stress-strain analysis, plot and display the temperature-time curve, identify potential high-temperature risks and immediately alarm. The X-ray detector captures the display of image data, and after decoding processing, stores it according to the preset sampling frequency. The pressing rate and compression ratio in the pressing molding process of the raw material sample can be accurately controlled, and the temperature, heat change, pressure and its change rate and other key parameters can be accurately controlled and monitored. According to the material characteristics, unidirectional cold pressing or hot pressing can be selected, and the stress-strain curve can be output in real time. The mechanical behavior of the material during the pressing process is evaluated to form a standardized and repeatable high-throughput experimental process. Multiple samples can be processed at one time, and the samples can be quickly switched to ensure the consistency of the pressure, temperature and other environmental factors corresponding to each compression chamber, which is helpful to improve the repeatability of the experimental results and the reliability of the data.

[0054] In one or several embodiments, compared with the defect that the material sample pressed by conventional bonding materials is too small in size, it is difficult to measure the heat change, and it is unable to reflect the heat change in the material molding process, this embodiment calculates the heat change of the raw material sample according to the monitored current work signal through the signal acquisition and processing system during hot pressing.

[0055] In an optional embodiment, the heat change ΔQ of the raw material sample satisfies: ; Wherein, Pt is the output power of the heating tube 5 when the sample has temperature fluctuation at time t; P0 is the electric power of the heating tube 5 when the sample is preheated and stable; t0 is the start time of pressing, t1 is the end time of pressing, and Δt is the sampling time interval. The temperature change and heat change of the microenvironment in the compression mold 3 can be monitored in real time through the signal acquisition and processing system.

[0056] 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 compression begins, at time t, the sample undergoes heat changes due to changes in physical and chemical 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 properties of the material during the pressing process can be obtained, that is, if P t >P0, the material sample absorbs heat, otherwise it releases heat; after the pressing is completed, the heat is balanced again, and the multiple P tThe value can be used to obtain the heat change of the material sample during the entire pressing process.

[0057] In one or more embodiments, in step S3, before pressing, a temperature threshold is set by a signal acquisition and processing system; during the pressing process, the acquired temperature signal is compared with the temperature threshold, and when the temperature exceeds the set range, the pressing process is paused and / or an alarm is issued. Automatic risk warning and automatic disposal of the pressing process are achieved, reducing experimental risks.

[0058] In one or more embodiments, 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 performance of the material.

[0059] A high-throughput capsule-type experimental method for compression molding of adhesive materials in this embodiment realizes automated and streamlined rapid multiple adhesive material compression experiments by performing non-invasive real-time monitoring and data collection on multiple capsule-type compression molds 3. 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.

[0060] 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 protection scope of the present invention.

Claims

1. A high-throughput capsule experimental system for compression molding of bonding materials, characterized in that: include: A die assembly, comprising a lower die (1), an upper die (2) and a compression mold (3), wherein a plurality of the lower die (1) are arranged, each of the lower die (1) being fitted with the compression mold (3), the upper die (2) and the lower die (1) being respectively provided with a thermocouple (4), the upper die (2) being able to align with any one of the lower die (1) and extend into the compression mold (3) to form a compression cavity (31), and the upper die (2) being 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. A 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 a moving shaft (73) of a telescopic motor, and the force sensor (6) is arranged on the moving shaft (73); the displacement monitoring mechanism comprises a vernier magnetic ring (71), and a side of the vernier magnetic ring (71) away from the moving shaft (73) is sleeved on a measuring rod of a magnetostrictive displacement sensor (72).

4. A 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 sleeve, 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 experiment 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 material structural component; when the compression mold (3) is used for hot pressing of materials, the compression mold (3) is an aluminum silicon glass material structural component.

6. A high-throughput capsule experimental method for compression molding of bonding 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 mounted 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 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 another 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 experimental method for compression molding of bonding 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 experimental method for compression molding of bonding 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 according to the monitored current power signal, and 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 experiences 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 pressing start time, t1 is the pressing end time, and Δt is the sampling time interval.

9. A high-throughput capsule experimental method for compression molding of bonding 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 experimental method for compression molding of bonding 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.

Images