Injection moulding process optimization of citrus fiber biocomposites by simulations and taguchi experimental design

magistrsko delo

Peter Fajs (Author), Zoran Ren (Mentor), Matej Borovinšek (Co-mentor)

Abstract

The objective of the master thesis is to determine the filling properties of injection moulding process for newly created material, and to understand how the variation of processing parameters affects the flow possibilities. In thesis two materials were analysed, i.e. neat PLA material, which was used as a benchmark material and newly created composite CitrusPLA that is based on biodegradable PLA matrix and reinforced with citrus fibres. To fulfil the aim, the virtual and experimental design of experiment with the Taguchi methodology was conducted with use of spiral flow test, where the flow length of material through mould cavity was observed. The experimental results were the basis for the accuracy validation of numerical results and also to determine the optimum process parameters for injection moulding products with best flow conditions through statistical evaluation. It has been concluded that the newly created composite has lower viscosity compared to benchmark virgin PLA which results in better flow conditions in spiral flow test analysis. Both materials have the same optimal conditions in terms of flow conditions. The contribution of mould temperature is in both cases negligible. However, other two variated parameters i.e. melt temperature and injection speed have higher influence on filling characteristics for both materials.

Keywords

injection moulding optimization;material characterization;Moldflow;injection moulding simulations;Taguchi DOE;bio-composites;citrus waste fibres;PLA;

Data

Language:	English
Year of publishing:	2019
Typology:	2.09 - Master's Thesis
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	[P. Fajs]
UDC:	519.876.5:678.7.027(043.2)
COBISS:	22654998
Views:	1036
Downloads:	4
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary title:	OPTIMIZACIJA PROIZVODNEGA PROCESA BRIZGANJA BIOKOMPOZITNIH MATERIALOV NA OSNOVI CITRUS VLAKEN Z NUMERIČNIMI SIMULACIJAMI IN TAGUCHI METODO NAČRTOVANJA EKSPERIMENTOV
Secondary abstract:	Magistrsko delo preučuje lastnosti zapolnjevanja orodne votline pri procesu brizganja plastike za novonastali biokompozit. Namen študije je ugotoviti, kako sprememba procesnih parametrov vpliva na lastnosti zapolnjevanja materiala. Delo analizira dva materiala, biorazgradljivi termoplastični polimer PLA, ki je uporabljen kot referečni material in novonastali biokompozit CitrusPLA, ki temelji na biorazgradljivi matrici in je ojačan s citrus vlakni. Izvedena sta bila numerični eksperiment v programskem paketu Moldflow in eksperimentalni načrt eksperimentov na napravi za brizganje plastike, ki je hkrati služil za določitev točnosti numeričnih simulacij. Zasnova eksperimenta je temeljila na Taguchi metodologiji načrtovanja eksperimentov in potekala na orodju za spiralni test zapolnjevanja orodne votline, ki je standardiziran postopek, s pomočjo katerega analiziramo odziv materiala na spremembo vhodnih parametrov. S statistično metodo ANOVA smo v nadaljevanju izračunali vpliv parametrov na sposobnost tečenja materiala in določili optimalne nastavitve brizganja z željo po maksimalnem zapolnjevanju orodne votline lastnosti tečenja biokompozita. Rezultati kažejo, da ima novonastali kompozit nižjo viskoznost kot referenčni PLA material, kar se izkazuje z lažjim tečenjem materiala in večjo zapolnitvijo orodne votline. Implementacija načrtovanja eksperimentov po Taguchiju se je izkazala kot učinkovito orodje. Določitev optimalnih procesnih nastavitev brizganja CitrusPLA materiala je bila uspešna, kar je pokazal tudi eksperimentalni potrditveni test, kjer smo dosegli najdaljšo pot tečenja po spirali med vsemi izvedenimi eksperimenti.
Secondary keywords:	optimizacija brizganja plastike;karakterizacija materiala;simulacije brizganja plastike;biokompoziti;odpadna vlakna citrusov;magistrske naloge;
URN:	URN:SI:UM:
Type (COBISS):	Master's thesis/paper
Embargo end date (OpenAIRE):	2022-05-29
Thesis comment:	Univ. v Mariboru, Fak. za strojništvo, Računalniško inženirsko modeliranje
Pages:	XIII, 92 str.
ID:	11136634