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Advisor(s)
Abstract(s)
Nos dias de hoje, a Indústria Metalomecânica é uma mais-valia na economia nacional,
tomando a dianteira. O Grupo Simoldes, o maior fabricante de moldes, com uma
qualidade reconhecida mundialmente, está focando a indústria automobilística.
A unicidade de cada molde é uma característica latente. Mesmo que elaborado por um
único projetista, num espaço e tempo distintos, o molde não perderá a sua
singularidade, sendo certo que não haverá dois iguais. Desta forma, cada molde a
executar apresenta-se como um novo desafio, quer em termos de prazo, especificações
e complexidades geométricas, apresentadas pelas peças.
Assim, este trabalho tem como intuito fulcral mostrar a realidade do projeto e
fabricação de um molde para injeção bi-matéria, dentro da Indústria Global de Moldes
(IGM), empresa que pertence ao Grupo Simoldes. Este espécime de molde, injeta
plástico e posteriormente borracha, apresenta uma tecnologia recente no fabrico de
peças na indústria automóvel. Desta forma, há várias fases a processar, desde o estudo
da peça recebida, onde o projetista poderá sugerir alterações para facilitar tanto o
projeto como reduzir custos; estudo da máquina disponível para o molde; execução de
um desenho 3D preliminar; elaboração e modelação dos mecanismos necessários e por
fim, o desenho final concluído, abarcando todas as especificidades. Posteriormente,
seguem-se os ensaios a fim de se obter a peça, o mais perfeita possível, para aprovação
do cliente.
Todavia, deve-se referir que se acertam alterações propostas pelo cliente em qualquer
fase do molde, o que pode implicar um acréscimo de custos.
A título de conclusão, a fase de projeto exige extremos cuidados na tomada de decisões,
atendendo a que todas as alterações derivam em custos, e podem fazer oscilar a
satisfação do cliente. De salientar que, no decorrer do projeto analisado, foram
adotados os melhores processos de fabrico, verificando-se que o departamento técnico
tomou opções excecionais, visando o sucesso do mesmo, e, desta forma, garantindo a
qualidade exigida pelo cliente.
Nowadays the metalworking industry is one of the main drivers of the national economy, being Grupo Simoldes the largest mold fabricator of the country. The manufacturing quality of the group is present in all products and is well known worldwide, being its main focus the automotive industry. One of the main characteristics of a mold is its inherent singularity. Independently if created by a single designer, in a certain place and time, no mold will ever be exactly the same. Therefore, each new production of a mold presents a challenge, whether in terms of deadlines, complex geometry or specification of the parts to produce. Thus, the main objective of this report is to illustrate the reality behind the design and fabrication of a co-injection mold, produced at Indústria Global de Moldes (IGM), company that is owned by Grupo Simoldes. These types of molds inject polymer and elastomer materials simultaneously during one moulding cycle, being a new trend in production of automotive parts. Consequently, in order to design a mold of such a complex nature, there are various different phases that must be achieved, such as: the study/analysis of the part that will be created by the mold, being that in this phase the mold designer may advise the costumer of worthwhile changes to the part design in order to lower future costs; the choice of compatible injection moulding machines to work with the produced mold; the execution of a preliminary 3D drawing concept of the mold; the modeling and elaboration of all the necessary mechanisms that will work with the mold and lastly the creation of a fully detailed 3D design with all necessary specification needed for production. Posteriorly to the production of the mold, several tests need to be made to ensure that the final injected products are within costumer specification. Nevertheless, at any given time, modifications may be made to initial designs upon costumer request, implying added costs. As general conclusion, the design phase demands responsible and well thought decisions, as each modification done may imply added costs, giving way to client dissatisfaction. It should be noted that during the elaboration of this project, the technical department made particular decisions regarding the manufacturing processes used, with the objective of guaranteeing the desired success and ensuring overall demanded quality.
Nowadays the metalworking industry is one of the main drivers of the national economy, being Grupo Simoldes the largest mold fabricator of the country. The manufacturing quality of the group is present in all products and is well known worldwide, being its main focus the automotive industry. One of the main characteristics of a mold is its inherent singularity. Independently if created by a single designer, in a certain place and time, no mold will ever be exactly the same. Therefore, each new production of a mold presents a challenge, whether in terms of deadlines, complex geometry or specification of the parts to produce. Thus, the main objective of this report is to illustrate the reality behind the design and fabrication of a co-injection mold, produced at Indústria Global de Moldes (IGM), company that is owned by Grupo Simoldes. These types of molds inject polymer and elastomer materials simultaneously during one moulding cycle, being a new trend in production of automotive parts. Consequently, in order to design a mold of such a complex nature, there are various different phases that must be achieved, such as: the study/analysis of the part that will be created by the mold, being that in this phase the mold designer may advise the costumer of worthwhile changes to the part design in order to lower future costs; the choice of compatible injection moulding machines to work with the produced mold; the execution of a preliminary 3D drawing concept of the mold; the modeling and elaboration of all the necessary mechanisms that will work with the mold and lastly the creation of a fully detailed 3D design with all necessary specification needed for production. Posteriorly to the production of the mold, several tests need to be made to ensure that the final injected products are within costumer specification. Nevertheless, at any given time, modifications may be made to initial designs upon costumer request, implying added costs. As general conclusion, the design phase demands responsible and well thought decisions, as each modification done may imply added costs, giving way to client dissatisfaction. It should be noted that during the elaboration of this project, the technical department made particular decisions regarding the manufacturing processes used, with the objective of guaranteeing the desired success and ensuring overall demanded quality.
Description
Keywords
Moldes para injeção de dois materiais distintos Bi-matéria Bi-injeção Moldes rotativos Polipropileno (PP) Elastômero Termoplástico (TPE) Etileno-Propileno-Dieno (EPDM) Injeção de plásticos Moldes Molds for dissimilar material injection Co-injection Bi-injection Bi-material Polypropylene (PP) Thermoplastic elastomer (TPE) Ethylene propylene diene monomer (EPDM) Plastic injection Molds