20.500.12556/RUL-135121 Comprehensive areal geometric quality characterisation of injection moulded thermoplastic gears Injection moulding is currently the most widely employed production method for polymer gears. Current standardised gear metrology methods, which are based on metal gear inspection procedures, do not provide the key information regarding the geometric stability of injection moulded gears and are insufficient for a thorough gear inspection. The study developed novel areal quality parameters, along with a so-called moulding runout quality parameter, with a focus on the injection moulding method. The developed parameters were validated on twenty-nine gear samples, produced in the same moulding tool using various processing parameters. The gears were measured using a high-precision structured-light 3D scanner. The influence of injection moulding process parameters on the introduced novel quality parameters was investigated. The developed moulding runout quality parameter proved to be effective in evaluating the shrinkage that can occur in the injection moulding process. The novel moulding runout parameter returned an average value of −21.8 μm in comparison to 29.4 μm exhibited by the standard parameter on all the gears, where the negative value points directly to mould shrinkages. The rate of cooling was determined to be the most influential factor for the shrinkage of the gear. The developed areal parameters demonstrated to be advantageous in characterising the deviations on the teeth more comprehensively. gear metrology injection moulding geometrical quality parameters polymer gears zobniško meroslovje injekcijsko brizganje parametri geometrijske natančnosti polimerni zobniki true false true Angleški jezik Slovenski jezik Članek v reviji 2022-02-23 10:18:31 2022-02-23 10:18:34 2022-09-14 04:11:44 0000-00-00 00:00:00 2022 0 0 19 str. iss. 4, art. 705 Vol. 14 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.83.052:678.027.74 2073-4360 10.3390/polym14040705 97321219 RAZ_Urbas_Uros_2022.pdf RAZ_Urbas_Uros_2022.pdf 1 4217E2F0074292C6D3F71317C4B35AED c93a5bcfeadce28ce46600b64ff74bbf4eae629d46ad7a6284af387dfc68e38f 019fdb0e-948a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154011 https://www.mdpi.com/2073-4360/14/4/705 1 526e9236-9489-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154010 Fakulteta za strojništvo 0 0 0