Educational Institution: Cherkassk State Technological University Project description: The internal database for every part of the assembly unit was created in the computer model. While designing the 3D model, the user can select the desired elements of the structure from the internal database. Parametric model of the mold allows the user to obtain standard structures of parts "Cap" with a range of diameter dimensions 30-45 mm. If required, the internal database can be augmented. When changing parameters of individual parts of the mold, the total assembly model is automatically recalculated.