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Abstract(s)
A Indústria Portuguesa de Moldes tem vindo a crescer e a ganhar projeção internacional,
impulsionada pela procura externa e motivada por uma relação qualidade / preço / prazos de
entrega, muito competitiva. A fabricação de um molde é sempre um novo desafio, dadas as
especificações de cada peça e à complexidade geométrica que normalmente apresentam. O
processo de injeção de plásticos é comum em diversos setores de atividade, mas é na
indústria automóvel que as técnicas e as tolerâncias são mais exigentes, com principal
destaque para componentes de motores e componentes eletrónicos.
Neste trabalho descreve-se a rota de fabricação por injeção de uma peça plástica,
componente de encaixe para uma tomada elétrica, segundo os requisitos e especificações
técnicas (tolerâncias dimensionais) impostas pelo cliente. Desde à análise de um artigo
(conceito virtual), o seu estudo reológico, planeamento e elaboração do projeto do molde,
escolha dos materiais, acabamento e controlo de qualidade, identificando defeitos e
propondo medidas de correção, tendo em consideração os fatores que contribuem de forma
ativa para a obtenção das peças projetadas, com a máxima qualidade e rigor exigidos.
Através do software de simulação 3D: “Moldex3D (Plastic Injection Molding Simulation)”
procedeu-se a uma análise detalhada da peça plástica, antevendo problemas e propondo
correções ao projeto do molde. Consequentemente são também abordados conceitos gerais
como a classificação dos termoplásticos, o artigo, o molde, a peça plástica e o estudo
reológico, centrando-se finalmente pela discussão do caso de estudo, descrevendo
metodologias e propondo melhorias.
The Portuguese Mold Industry has been growing and gaining international exposure, driven by external demand and motivated by a very competitive quality / price / delivery time relationship. The manufacturing of a template is always a new challenge, given as specifications of each piece and once every time. Philips' Ingersoll process is an active industry, but the industry is as specialized as the tolerances are more demanding, especially the components of motors and electronic components. This work describes the route of manufacturing by injection of a plastic part, fitting component for an electrical outlet, according to the requirements and technical specifications (dimensional tolerances) imposed by the customer. From the analysis of an article (virtual concept), its rheological study, planning and elaboration of the mold design, choice of materials, finishing and quality control, identifying defects and proposing corrective measures, taking into account the contributing factors of an active way to obtain the projected parts, with the highest quality and rigor required. Through the 3D simulation software "Moldex3D (Plastic Injection Molding Simulation)" a detailed analysis of the plastic part was done, anticipating problems and proposing corrections to the design of the mold. Consequently, general concepts such as the classification of thermoplastics, article, mold, plastic and rheological study are also addressed, focusing finally on the discussion of the case study, describing methodologies and proposing improvements.
The Portuguese Mold Industry has been growing and gaining international exposure, driven by external demand and motivated by a very competitive quality / price / delivery time relationship. The manufacturing of a template is always a new challenge, given as specifications of each piece and once every time. Philips' Ingersoll process is an active industry, but the industry is as specialized as the tolerances are more demanding, especially the components of motors and electronic components. This work describes the route of manufacturing by injection of a plastic part, fitting component for an electrical outlet, according to the requirements and technical specifications (dimensional tolerances) imposed by the customer. From the analysis of an article (virtual concept), its rheological study, planning and elaboration of the mold design, choice of materials, finishing and quality control, identifying defects and proposing corrective measures, taking into account the contributing factors of an active way to obtain the projected parts, with the highest quality and rigor required. Through the 3D simulation software "Moldex3D (Plastic Injection Molding Simulation)" a detailed analysis of the plastic part was done, anticipating problems and proposing corrections to the design of the mold. Consequently, general concepts such as the classification of thermoplastics, article, mold, plastic and rheological study are also addressed, focusing finally on the discussion of the case study, describing methodologies and proposing improvements.
Description
Keywords
Artigo e Molde Defeitos de Fabrico Fabrico Por Injeção (de Plástico) Indústria Automóvel Simulação da Reologia Termoplásticos