Proceedings of COBEM 2009 20th International Congress of Mechanical Engineering Copyright © 2009 by ABCM November 15-20, 2009, Gramado, RS, Brazil INSTRUCTIONS FOR THE DETAILED PROJECT OF INJECTED PLASTIC COMPONENTS USING DFMA Márcio F. Catapan, catapan@up.edu.br Universidade Positivo – Curitiba-PR Fernando A. Forcellini, forcellini@deps.ufsc.br Universidade Federal de Santa Catarina – Florianópolis-SC Luciana G. Persicotti Catapan, lupersicotti@hotmail.com Faculdade Estácio Radial – Curitiba-PR Abstract. The injection molded plastic components (IMPC) are generally alternative economic, efficient and necessary for the mass production of products. However, the process of development of these components is complex, mainly in the phase of detailed project. This phase is initiated with one the conception selected in the conceptual project phase, which presents one high degree of abstraction. As result of the detailed project has the drawing/project of the component. In the detailed project modifications in the form of the component occur, aiming at mainly its manufacturability, assembly and moldability Currently, works exist on methodologies of development of IMPC that treat since the informational project of these components until the manufacture of the injection mold. However, these methodologies if show including, requiring the development of works that focal the use of methods of DFMA (Project for Manufacture and Assembly) in the aid to the definition of the component form of more systemic form. Under this target, the objective of this work is to instruct, of methodology form, some lines of direction of the project detailed for the definition of the form in IMPC, under the boarding of the DFMA. Thus, the possibility of reworks or redesign of the component can be minimized, still in the Detailed Project phase. Keywords: injection molded plastic components, methodology, Detailed Project and DFMA. 1. INTRODUCTION The current period of training of development in the plastic sector comes showing the position reached for this type of material, in the production of consumption good, especially the gotten ones for the process of molding for injection. In the constant search of the operational efficiency and better productivity, the first step given for the organizations was to improve the productive system. With the evolution technique, currently, many companies had started to implement programs of guarantee of the quality in the conformity of the product. However, those companies who develop differentiated products and with quality have more quality. Front to this, much attention is being directed to the project process, therefore the quality cannot be inserted in a product not to be that she has been projected in it. One of the main results was to the discovery of the importance of the manufacture costs and assembly. It was raised then, merit of the principles of one of the more important methodologies of project, the DFMA (Design will be Manufacturing and Assembly), originated in the Europe in years 70, whose objective is to simplify the product in order to reduce costs (Catapan, 2006). In this direction, this article is presented in the form to display some parameters of project for the definition of the form in injected plastic components in the phase of detailed project, organizing the knowledge of systemic form, under the optics of the DFMA. 2. PROCESS OF PROJECT OF INJECTED PLASTIC COMPONENTS The process of molding for injection is one of the main processes in the area of manufacture of plastic parts. About 32% of the produced plastic parts in Brazil they are manufactured by this process (Mascarenhas, 2002). The capacity to produce complex parts in great amount and in necessary way is responsible for this. Although its great use, the conditions of molding of parts for injection during the accomplishment of its cycle, can take to the sprouting of effect or phenomena compromising the structure of the part, its dimensional tolerances or even though its appearance. The knowledge of these effects for the project team can assist in the development of the product in its phase of detailed project, especially in the determination of specific forms, the analyses of moldability, easy manufacture and assembly, which can be carried through with aid of the DFMA methods. According to Blacksmith (2002), the process of development of injected plastic components, is characterized for being an activity to multidiscipline, and carried through in a fragmented environment. Multidiscipline, for considering information proceeding from distinct fields of knowledge. Multidiscipline, for the project of the injected component to involve the iteration and interaction of relative information to these fields of knowledge. Multidiscipline, for the project of the injected component to involve the iteration and interaction of relative information to these fields of knowledge. E, broken up environment, for the nature of the organization of the involved companies in this activity, that is, generally exists a responsible company for the project of the component; other, responsible for the process of injection e; one third, that it executes the development of the injection mold, as Figure 01.