Investigations of the plastics flow during the injection molding process - selected results

• Autorzy: Nabialek J. , Kwiatkowski D.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of present paper was presenting chosen results of investigations on polymer flow during mould cavity filling phase of injection process. Deep understanding of the phenomena which occur during filling the injection mould may lead to more effective design of the processing tools and shortening of the time for implementation and production time. Design/methodology/approach: The results of computer simulations of injection process have been compared with the results of video recording for the plastic flow during filling phase. For the simulation investigations a professional computer software Moldflow Plastics Insight ver. 4.1. has been employed. A specialized injection mould which enables observation and registration of the plastic flow during processing has been employed. The mould enables direct monitoring of the course of phenomena inside the mould cavity in two planes. To record the flow, a digital video camera has been employed. As an example the issue of flowing around the rectangular obstacle of the plastic stream and flowing through the throat have been described. Findings: The results of the investigations enabled documenting of specific phenomena which occur during plastics or their composites injection process. The registered video sequences have been compared with the results of numerical calculations and then it was estimated to what degree the computer simulation of injection process may be useful in practice. Research limitations/implications: The camera enabled to register the flows with the rate of 25 fps. This reduced the scope of the investigations, since at higher plastic flow speeds the registered image became less clear. The investigations were performed on a wide scale, however, only chosen results have been presented. Originality/value: The transparent sight-glasses have been used, made of a material called Zerodur® which is characterized by the coefficient of thermal expansion close to zero.

Słowa kluczowe

EN

computer assistance in engineering tasks; computer assistance in scientific research; monitoring of polymer flow during injection molding process; mold flow analysis; image analysis

PL

wspomaganie komputerowe; zadanie inżynierskie; badania naukowe; przepływ polimerów; wtryskiwanie; analiza obrazu

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 17, nr 1-2
• Strony: 225--228
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Nabialek J.

• Institute of Polymer Processing and Production Management, Czestochowa Technical University, Al. Armii Krajowej 19c, Czestochowa, Poland

autor

Kwiatkowski D.

• Institute of Polymer Processing and Production Management, Czestochowa Technical University, Al. Armii Krajowej 19c, Czestochowa, Poland

Bibliografia

• [1] H. Yokoi, S. Takematsu, Visualization of Burning Phenomena during Cavity Filling Process, PPS-18 Conference Proceedings (on CD), Polymer Processing Society Annual Meeting, Guimarāes 2002, 407
• [2] S.Y. Yang, S.C. Nian, I.C. Sun: Flow Visualization of Filling Process during Micro-Injection Molding. International Polymer Processing. Hanser. XVII, 2002, p. 354-360
• [3] S. Hasegawa, H. Yokoi, Y. Murata, Dynamic Visualization of Cavity Filling Process in Ultra-high Speed and Thin Wall Injection Molding, Europe-Africa Meeting of Polymer Processing Society, Athens, 2003, Conference Proceedings (on CD), 90-O.
• [4] A. Banasiak, T. Sterzynski: „The assessment of flow in the injection's mould of polymer with plate filler as marker". Polimery 49, Issue 6, p. 442-448 (in Polish)
• [5] J. Nabialek: „The prototype of injection mould for monitoring and recording of plastic flow during the injection molding process". (in:) Polymer materials and their processing. Multiauthor work. Czestochowa 2004, p. 325-331 (in Polish)
• [6] A. Banasiak, A. Bledzki, T. Sterzynski: "Flow lines visualization by injection molding of a model system PE + talc". PPS Athens 2003, Proceedings, 93
• [7] http://www.schott.com/lithotec.