Visualization of melt flow lines in injection moulding

• Autorzy: Bociąga E. , Jaruga T.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The examination of melt flow lines in injection moulded parts using a new method of flow visualization, which can be helpful in predicting weak areas in moulded parts created during cavity filling, was the purpose of this research. Design/methodology/approach: The method of visualization used here is not classified yet. It allows to observe how the cavity is filled by looking at a specially created flow lines pattern. Normally they are defects and it is necessary to avoid them. In order to obtain such an effect on part surface the mould temperature was lowered, the holding stage was skipped (the holding pressure not applied), and injection time had to be short enough. Findings: It was found on the example of moulded plastic parts of simple shape that the applied method of visualization allows to observe the filling process in mould cavity with good agreement to the theory and simulation results. Research limitations/implications: The flow lines can be observed for some plastics like POM or PE when applying special processing conditions. The flow conditions are not the same as in a typical injection moulding process. Practical implications: This method can be used for melt flow examination in the case of more complicated cavities and can help when having some problems in processing because of part design, for example improper weld line location. Originality/value: Usually visible flow lines on part’s surface are treated as a defect. In this paper it is shown that it can be an easy method of flow visualization.

Słowa kluczowe

EN

plastic forming; flow visualization; injection moulding

PL

kształtowanie plastyczne; wizualizacja przepływu; formowanie wtryskowe

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 331--334
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Bociąga E.

• Institute of Polymer Processing and Production Management, Al. Armii Krajowej 19c 42-200 Częstochowa, Poland

autor

Jaruga T.

• Institute of Polymer Processing and Production Management, Al. Armii Krajowej 19c 42-200 Częstochowa, Poland

Bibliografia

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• [13] A. Banasiak, T. Sterzyński, Assessment of a Flow of a Polymer, Filled with Lamellar Filler as a Marker, in an Injection Mold, Polimery 49 (2004), 442-448 (in Polish).
• [14] Practical Guide to Injection Moulding, Edited by Vanessa Goodship, Rapra Technolgy Limited and ARBURG Limited, 2004, 193-194.
• [15] C-MOLD Design Guide. A Resource for Plastics Engineers, Third Edition, C-MOLD, Ithaca, New York, U.S.A, 1998.
• [16] R. Sikora, Basics of Polymer Processing, Lublin Polytechnic Publishers, Lublin, 1992, 501.