Real time monitoring method for resin rheological property under action of ultrasound, and apparatus thereof

Abstract

The invention discloses a real time monitoring method for resin rheological property under an action of ultrasound, and an apparatus thereof. The monitoring method is characterized by: directly putting a detection sensor in a resin container under the action of the ultrasound; carrying out dynamic, real-time, multi-point and exact measuring and monitoring for resin viscosity and the resin rheological property when the resin is under the action of the supersonic vibration. The apparatus comprises a viscosity tester, a temperature controller, a bathtub, a temperature tester and the resin container. The apparatus is characterized in that: the apparatus further comprises an ultrasonic transducer, a ultrasonic generator, a fixing apparatus and a isolation apparatus, wherein the ultrasonic transducer is arranged in the isolation apparatus through the fixing apparatus, a tool rod of the ultrasonic transducer sequentially passes through the isolation apparatus and a side wall of the resin container, and enters into the resin container, and is provided for directly acting on the resin requiring detection. The tool rod can be freely adjusted in three dimensions, wherein the tool rod can swing up and down, left and right, and stretch forward and backward in the resin container, such that real time measuring and monitoring of the resin rheological property at different space position points on the face under the action of the ultrasound are realized.

Description

technical field [0001] The invention relates to resin rheological performance monitoring technology, in particular to a real-time monitoring method and device for resin rheological performance under ultrasonic action. Background technique [0002] With its cavitation effect, acoustic flow effect and thermodynamic effect, high-energy ultrasound can promote the formation and collapse of cavitation bubbles in liquids, enhance the flow of liquids, and reduce the viscosity of liquids. modified. In recent years, there are more and more applications of ultrasonic action to improve the rheological properties of resins, such as the ultrasonic treatment resin transfer molding method and its devices reported in Chinese patent 03132430.4, which improves the infiltration of resin to fibers during RTM molding properties, which reduces the void content, thereby improving the interfacial properties of the composite material; another example is Chinese patent 202010126838.7, which reports a...

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Problems solved by technology

This test method mainly has the following problems: (1) the test environment of the subsection or separate test is not synchronized with the ultrasonic action environment, and there are errors between the test data and the real data; (2) the subsection test is non-real-time monitoring, due to There is a phenomenon of energy attenuation in the propagation of ultrasonic waves, and the difference in the ultrasonic sound pressure gradient in the effective space of the ultrasonic wave directly affects the change of the rheological properties of the resin.

Therefore, when using the segmented test method, in the process of repositioning the test unit, it is impossible to guarantee the consistency of the position of the test unit space area and the effective space area of ​​the ultrasonic wave (generally there are differences), and there are also errors in the test data; (3) points The section test method can only realize the test that the ultrasonic wave acts along the axial direction of the test container, and the change of the rheological properties of the resin under the action of the ultrasonic wave in the non-axis direction cannot be evaluated; (4) Due to the acoustic flow effect of the ultrasonic wave, the resin matrix is ​​always in a circulating flow In the process, the rheological properties of the resin measured under the action of ultrasound are the result of the mutual flow of resins in different spatial positions, while the segmented test method gradually slows down the circulation flow of the resin matrix due to the cessation of the action of ultrasound. causing the test results to be inconsistent with the actual situation

[0009] From the above analysis, it can be seen that the existing detection methods and devices cannot accurately and real-time reflect the change law of the rheological properties of the resin under the action of ultrasound.

Within the scope of the applicant's search, there are no reports on the real-time monitoring device and method for the change of resin rheological properties under the action of ultrasound.

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