Molding cavity information online detection apparatus during injection molding process

Abstract

According to the present invention, a molding cavity information online detection apparatus during an injection molding process is designed and manufactured, wherein the thermal change condition and the mechanical change condition of a plastic melt in a mold molding cavity, the filling mode information and the micro-shape evolution behavior are respectively detected by comprehensively utilizing a traditional sensor detection method, a visualized observation method and an ultrasonic wave detection method; in the detection apparatus, the plastic mold is designed into the mold structure having a lateral parting pulling core while a data acquisition system is developed by simultaneously using a multimedia timer technology and a multi-threaded programming technology; and the experimental results show that the designed mold is safe and reliable, the detection apparatus can obtain the temperature information and the pressure information of the plastic melt during the molding, the filling mode image and the crystal form forming and evolution behavior, and the complete visualization of the injection molding process under the real processing condition is achieved.

Description

technical field [0001] The invention relates to a detection device, in particular to an online detection device for cavity information in an injection molding process. Background technique [0002] Injection molding is the most important means of producing high-performance plastic products. According to statistics, more than 80% of engineering plastic products are produced by injection molding. In the injection molding process, the plastic particles are melted and then filled into a closed mold cavity and finally cooled and solidified. The whole process is accompanied by severe temperature and pressure changes. In the mold cavity, the complex thermal and mechanical changes experienced by the plastic melt, the filling mode information displayed, and the final solidified micromorphological structure directly affect the strength, stiffness, thermal properties and transparency of plastic products. performance. In general, cavity information includes four categories of temperat...

AI Technical Summary

Problems solved by technology

However, most of the above research methods can only detect a certain type of cavity information, and their functions are relatively single, so they cannot comprehensively detect cavity information.

In the mold cavity, there are nonlinear, strong coupling and time-varying relationships between the temperature, pressure, velocity and microscopic shape information of the plastic melt and the performance of the final product. Correlation and influence relationship between process, microscopic morphology and product performance

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