This thesis deals with the production technology of the plastic top cover by injection molding. Series production is set at 500 000 units, for which the required period of delivery is 9 months. A literary study is developed, focusing on the technology of injection molding in molds in the first part of the thesis. The second part is practical, which includes a design technology for the manufacturing of the plastic top cover, namely: the choice of material, determination of process parameters, the choice of the injection molding machine, and the injection mold design. The chosen material is a polyamide 6 with 30 % share of the glass. According to technological parameters of injection, the injection molding machine, Engel ES 200/65, was chosen...