Anisotropy of physical properties injection moulded parts and its analysis

• Autorzy: Postawa P. , Gnatowski A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Anisotropy of physical properties in injection mouldings is a phenomenon commonly performing and very difficult to avoid. However in some cases for its size occurring of diversity of the property the using of such a element is becoming impossible. Chosen effects of examinations of anisotropy of properties depending on of the place and the method of the sampling research were presented in the article. Design/methodology/approach: A Dynamic Mechanical Thermal Analysis method giving possibility in the very precise solution was take advantage in examinations of differences between samples taken from each places injection moulding part. Research samples were cut from the flat plate and then were taken advantage to research. The method of the sampling was presented in the figure. Findings: How were presented in the discussion of effects of research in polymer materials processing particularly thermoplastics polymers, anisotropy of physical properties with indispensable phenomenon. Occurring anisotropy is involving diversity of durability of each areas of injection moulding part and different behaviour oneself during using. Samples taken from the beginning of the flow way were marked by better mechanical properties but poor suppressing properties. However samples taken parallel to the direction of the polymer flow in the mould were marked (in temperatures over 40 deg) with better suppressing properties. Practical implications: Analysis of examinations of anisotropy of mechanical and using properties in injection molded parts (presented in the article) could find practical application in polymer processing industry, both small and large enterprises. There are many problems with very complicated mouldings and the know-how presented in this article could be very useful industry application. Originality/value: New approach to precocious estimation anisotropy of physical properties were present in the paper.

Słowa kluczowe

EN

engineering polymers; mechanical properties; injection moulding; DMTA method

PL

polimery; właściwości mechaniczne; wtryskiwanie; metoda DMTA

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 23, nr 2
• Strony: 35--38
• Opis fizyczny: Bibliogr. 18 poz., fot., rys.

Twórcy

autor

Postawa P.

autor

Gnatowski A.

• Department of Polymer Processing and Production Management, Czestochowa University of Technology, ul. Armii Krajowej 19c, 42-200 Czestochowa, Poland,

Bibliografia

• [1] J. Koszkul, P. Postawa, Crystallization degree change for moldings and its influence on quality at extreme parameters of injection, 15th International Congress of Chemical and Process Engineering CHISA, Praga, 2002.
• [2] D. Kwiatkowski, Research of dynamical properties PET composite reinforced of Glass fiber using DMTA method, The progress and polymers materials manufacturing, Czestochowa University of Technology, Częstochowa 2002, 218 (in Polish).
• [3] D. Żuchowska, Constructional polymers, WNT, Warsaw 2000 (in Polish).
• [4] R. Pantani, A. Sorrentino, V. Speranza, G. Titomanlio, Molecular orientation in injection moldings of thermoplastics polymers, The Polymer Processing Society, PPS-17 Conference Proceedings, Montreal, Canada, 2001.
• [5] P. Postawa, Analysing of influence processing condition on choosen properties of injection moulded parts, Disertation, Faculty of Mechanical Engineering and Computer Science, Częstochowa University of Technology, Częstochowa 2003 (in Polish).
• [6] R. Brown, Handbook of polymer testing, Physical Methods, Marcel Dekker, 1999.
• [7] ISO DIN 11359, Plasatics - Thermomechanical Analysis, Part 2, Determination of coefficient of linear expansion and glass transition temperature.
• [8] ISO 294-3:1996(E), Plastics - Injection moulding of test specimens of thermoplastic materials - Part 3 - Small platter.
• [9] H. Möhler, S. Knappe, Thermal analysis for polymers, NETZSCH-Gerätebau GmbH, Selb, Germany 1998.
• [10] W. Przygodzki, Physical Method in Polymers Research, PWN, Warsaw 1990 (in Polish).
• [11] W. Szlezyngier, Metodology of polymers research, Rzeszow University of Technology, Rzeszów 1992 (in Polish).
• [12] R. Sikora, Elementary of polimer processing, Lublin University of Technology, Lublin 1992.
• [13] A. Smorawiński, Technology of injection moulding, WNT, Warsaw 1989 (in Polish).
• [14] D. Kwiatkowski, J. Nabiałek, P. Postawa, Influence of injection moulding parameters on resistance for cracking on example of PP, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 97-100.
• [15] P. Postawa, D. Kwiatkowski, Residual stress distribution in injection molded parts, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 171-174.
• [16] A. Gnatowski, J. Koszkul, Investigation PA/PP mixture properties by means of DMTA method, Journal of Materials Processing Technology 175 (2006) 212-217.
• [17] P. Postawa, D. Kwiatkowski, Residual stress distribution in injection molded parts, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 171-174.
• [18] E. Bociąga, T. Jaruga, Visualization of melt flow lines in injection moulding, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 331-334.