LILIANA LUCA, MINODORA MARIA PASARE STUDY ON A NEW CLASSIFICATION OF CAUSES WHICH GENERATE DEFFECTS OF INJECTION MOLDING PRODUCTS In this paper we present a study that was conducted to determine the classification of causes that generate defects in products obtained by injection of plastic material. A classification of the causes of defects is made by applying a quality management tool - the Ishikawa diagram. The causes are grouped into M categories, for defects generated by the design process and for defects generated by the injection process. A new model of the diagram is created by composing two fish skeletons (model 4M + 5M). At the end of the paper, the importance of the Ishikawa diagram is shown.