Device and method for ultrasonically measuring flow orientation of polymer melt on line

Abstract

The invention discloses a device for ultrasonically measuring flow orientation of polymer melt on line. An orientation device comprises a signal processing center, and at least two ultrasonic transducers for emitting and receiving an ultrasonic signal; the signal processing center is connected with the ultrasonic transducers; the two ultrasonic transducers are arranged on a melt flowing passage during formation of a polymer material; a measuring section of the device is arranged at a material outlet of an extruding machine or an injection molding machine; the ultrasonic transducers arranged on the cross section of the melt flowing passage are utilized, so that the orientation of the polymer which flows through the passage in real time can be represented through ultrasonic signals in the different directions on the cross section. According to the device, on-line measurement and representation research of the melt flowing orientation during processing of the polymer can be realized, the defects of off-line sampling measurement, rigorous sample-making requirements, high test expenses and the like of the traditional orientation test samples are overcome, on-line real-time monitoring of the flowing orientation of the polymer melt is realized, and the scientific evidence is provided for regulating processing conditions of products.

Description

technical field [0001] The invention relates to a measuring device in the field of polymer material forming and processing, in particular to an ultrasonic on-line measuring device and method for polymer melt flow orientation. Background technique [0002] The degree of orientation is an important parameter of polymer materials, and its size is closely related to the macroscopic physical properties of polymer materials. In addition to some characteristics of the polymer itself, characteristics such as phase morphology, aggregate structure, and molecular chain orientation formed during processing will have a significant impact on the performance of the product. Therefore, while improving the performance research of polymer materials, the detection and characterization of the structure of polymer materials has become an important research direction in the field of polymer research, and the real-time detection of materials in the process of material processing and molding has at...

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Problems solved by technology

[0008] The purpose of this invention is to use multi-point ultrasonic on-line measurement technology to study the melt flow orientation in the same flow channel section, to overcome the shortcomings of offline measurement of products, low production efficiency, and high cost in the prior art, and propose an ultrasonic on-line measurement of polymerization Device and method for melt flow orientation

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