20.500.12556/RUL-130372 Wavelet packet decomposition to characterize injection molding tool damage This paper presents measurements of acoustic emission (AE) signals during the injection molding of polypropylene with new and damaged mold. The damaged injection mold has cracks induced by laser surface heat treatment. Standard test specimens were injection molded, commonly used for examining the shrinkage behavior of various thermoplastic materials. The measured AE burst signals during injection molding cycle are presented. For injection molding tool integrity prediction, different AE burst signals descriptors are defined. To lower computational complexity and increase performance, the feature selection method was implemented to define a feature subset in an appropriate multidimensional space to characterize the integrity of the injection molding tool and the injection molding process steps. The feature subset was used for neural network pattern recognition of AE signals during the full time of the injection molding cycle. The results confirm that acoustic emission measurement during injection molding of polymer materials is a promising technique for characterizing the integrity of molds with respect to damage, even with resonant sensors. acoustic emission injection molding cracks feature vector pattern recognition akustične emisije injekcijsko brizganje razpoke vektorske funkcije razpoznavanje vzorcev true false true Angleški jezik Slovenski jezik Članek v reviji 2021-09-14 08:52:48 2021-09-14 08:52:49 2022-09-09 04:16:08 0000-00-00 00:00:00 2016 0 0 13 str. iss. 2, art. 45 Vol. 6 Feb. 2016 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.179.17(045) 2076-3417 10.3390/app6020045 14587419 RAZ_Kek_Tomaz_2016.pdf RAZ_Kek_Tomaz_2016.pdf 1 DFDC2AD7ADDB60C43456C487B34D238E 3f336059634e04b13cee13dacd6c3d917900f071ac71372121c0a4e1c55bbc7d 768aab33-1528-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147468 http://www.mdpi.com/2076-3417/6/2/45 1 1f1b9129-1528-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147467 Fakulteta za strojništvo 0 0 0