In this study, PC-ABS-based composite materials with NCF were developed and pelletized to realize improved dispersion of fillers in the mould chassis. The application of this new material in a car audio chassis was analysed through tests on mechanical properties and morphology, EMI testing and vibration analysis. NCF was used to balance both the mechanical and the electrical properties of the composites. The role of this filler was specifically investigated and compared with the results from previous studies, namely a mould chassis using a PC-ABS composite with 3wt% MF and 7wt% GF. The following conclusions are drawn from this study. 1. The tensile strength and the impact strength of the test materials are far superior to those in the previous study. Also, 12wt% NCF is a more appropriate proportion than 10wt% NCF because the EMI SE of PC-ABS-12wt% NCF is higher than 40 dB, which is the EMI SE regulation for car audio. 2. Although the EMI results of this study are not perfectly conclusive as appropriate hardware needs to be developed for the use of moulded chassis, the EMI SE results were very stable under both the sample specimen measurements and the actual car audio chassis measurements owing to the improved dispersion of fillers by the pelletization of the PCABS- NCF composite. 3. Vibration measurements (both computer-aided engineering and actual results) show that the requirement of less than 5g in the 10-100 Hz frequency range is met; hence, the design is appropriate in a general vehicle driving environment. 4. Considering all the results, the new mould chassis using PC-ABS-NCF has improved mechanical and electrical properties. In other words, the application of this new model in car audio is possible, and only the cost aspect has to be overcome.
Characterization of an injection-moulded car audio chassis made of polycarbonate-(acrylonitrilebutadiene- styrene)-based composite using metal-coated carbon fibre
2012
14 Seiten, 15 Bilder, 3 Tabellen, 25 Quellen
Article (Journal)
English
Autoradio , Gerätegehäuse , Thermoplastspritzguss , faserverstärkter Verbundwerkstoff , Polycarbonat , Copolymer-Acrylnitril-Butadien-Styrol , Kohlenstofffaser , Metallschicht , elektromagnetische Störung , Gehäuseschwingung , Schwingungsanalyse , elektrische Eigenschaft , Stoffanalyse , Füllstoff , Zugfestigkeitsprüfung , Schlagfestigkeitsprüfung
INJECTION-MOULDED PART AND METHOD FOR PRODUCING INJECTION-MOULDED PART
European Patent Office | 2021
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