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Vol.26, No.1, 2026, pp. 9–15 |
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INFLUENCE OF OVERFLOW TAB ON FIBRE ORIENTATION TENSOR AT WELD LINE FORMED BY INJECTION MOULDING - A NUMERICAL APPROACH Vesna Raspudić1*
1) University of Mostar, Faculty of Mechanical Engineering, Computing and Electrical Engineering, Mostar, FEDERATION of BOSNIA and HERZEGOVINA *email: vesna.raspudic@fsre.sum.ba , V. Raspudić https://orcid.org/0009-0002-1787-4591 2) University ‘Džemal Bijedić’ Mostar, Faculty of Mechanical Engineering, Mostar, FEDERATION of BOSNIA and HERZEGOVINA M. Manjgo https://orcid.org/0009-0001-1117-2620
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Abstract The mechanical performance of a product manufactured by injection moulding depends largely on the presence of weld lines, whose occurrence is often inevitable during a production cycle. Due to poor material bonding, the weld line shows loss of strength and impact resistance under the influence of external loads, threatening the overall integrity of the product. These negative effects are particularly pronounced in short fibre reinforced composites, because there is also a local non-uniform fibre orientation. One way to mitigate these effects is to use an overflow tab, in order to create the underflow through the core material layer after the weld line is initially formed. In recent years, due to the extremely complex behaviour of short fibre reinforced composites during injection moulding, the application of numerical simulation to describe these phenomena has gained great importance. The paper presents the application of Moldex3D Studio software to predict the influence of the overflow tab on the localised reduction of mechanical properties at weld lines. This involves describing changes in the distribution of fibre orientation tensor components as well as changes in the position and shape of the weld line region. Keywords: • polymer composites • short fibres • weld line • fibre orientation tensor • numerical simulation |
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full article (702 kB)
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