The aim of this work was to investigate the influence of six injection moulding process parameters on the post-moulding shrinkage and warping of parts made from polypropylene filled with calcium carbonate, as used in large quantities throughout the automotive industry. For experimental purposes, standard test specimens were used for the determination of post-moulding shrinkage and warping. Each experiment was observed precisely through the measurement of acoustic emission (AE) signals and in-cavity pressure. We scanned each test specimen using an optical 3D scanner for accurate measurement of post-moulding shrinkage and warping. The optimal set of parameters that provides minimal post-moulding shrinkage and warping, was determined by the Taguchi method, together with nominally-the-best (type II) quality characteristic. The most influential parameter was statistically obtained through analysis of variance, which showed that packing pressure had the largest impact. The results from the measured AE signals showed clear correlation with the post-moulding shrinkage and warping, indicating the possibility of on-line monitoring the adequacy of the process by capturing AE signals.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 16720150The method for detection of moisture of plastic materials within process of during the injection was proposed for a patent
F.33 Slovenian patent
COBISS.SI-ID: 17652789SLO The seminar work, developed in Laboratory for Signal processing and Remote control, was presented as a paper, which won a first price within a student contest at ERK 2013.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 17181462Within a diploma thesis a rubik cube solver using robotic arm was developed. Student Rok Rabuza developed a robot and progamed. The camera captured a Rubic cube and robot solved a Rubic cube. The thesis was presented on ERK 2013 and was third within a student contest.
E.01 National awards
COBISS.SI-ID: 17181718