Development of the Comprehensive Method Forquality Assessment of Plastic Parts

In present work we constructed the tree of quality indicators of plastic parts. A generalized algorithm is proposedto estimatethe quality level of plastic parts, which is the basis for the developmentof method forassessing the quality level of plastic parts. The designed algorithm, in contrast to those existing, includes a stage for the estimation of error in quality level, which will make it possible to improveaccuracy of determining thequality level of plastic parts. We devised acomprehensive method for evaluating quality of plastic parts. Its essence is in the fact that the obtained method allows us to determine anintegratedindicator of quality of plastic part, which includesa proposed nomenclature of quality indicators, represented in the form of the tree and the proposed generalized indicator of quality of plastic part.The developed comprehensive method differs from those existing by the proposed additional stage – the estimation of error in quality. Its essence is that it is necessary to determine: error in the number of properties that characterize quality; error in determiningthe weight coefficients;wear and aging of the materials that the MD are made of; error in the calculations of quality indicators;and permissible instrument errors. All these components will in turn make it possible to increase accuracy in the quality assessment of plastic parts.Results of present researchinto quality indicators ofpart's PMdemonstrated that for the selected part, one part of the values of relative quality indicators is larger than unity, and another part is lower, which does not make it possible to unambiguously estimate the quality level for the givenpart. The designed method is useful in the development of mathematical and CAD software for technological equipment. It might be applied in the fabrication of thermoplastic parts for radio-electronic equipment