{"id":13767,"date":"2021-05-29T08:54:05","date_gmt":"2021-05-29T07:54:05","guid":{"rendered":"https:\/\/metalpie.com\/blog\/investment-casting-process\/"},"modified":"2026-07-21T07:46:15","modified_gmt":"2026-07-20T23:46:15","slug":"processo-de-fundicao-por-cera-perdida","status":"publish","type":"post","link":"https:\/\/metalpie.com\/pt\/blog\/processo-de-fundicao-por-cera-perdida\/","title":{"rendered":"Processo de fundi\u00e7\u00e3o por cera perdida"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><a href=\"https:\/\/metalpie.com\/pt\/blog\/processo-de-fundicao-de-metais\/\">Fundi\u00e7\u00e3o de metal<\/a> continua sendo um pilar fundamental da manufatura moderna, fornecendo componentes precisos para diversos setores. Entre as v\u00e1rias t\u00e9cnicas, a <strong>Processo de fundi\u00e7\u00e3o por cera perdida<\/strong> (tamb\u00e9m conhecido como fundi\u00e7\u00e3o por cera perdida) se destaca por sua capacidade de produzir pe\u00e7as met\u00e1licas complexas e de alta precis\u00e3o, com acabamentos superficiais superiores e desperd\u00edcio m\u00ednimo de material.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">O que \u00e9 fundi\u00e7\u00e3o por cera perdida?<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">A fundi\u00e7\u00e3o por cera perdida \u00e9 um processo de conforma\u00e7\u00e3o de metais de precis\u00e3o no qual o metal fundido \u00e9 vertido em um molde cer\u00e2mico descart\u00e1vel criado em torno de um modelo de cera. Assim que o metal esfria e se solidifica, a camada cer\u00e2mica \u00e9 quebrada para revelar a pe\u00e7a met\u00e1lica acabada.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Para os engenheiros de projeto, a fundi\u00e7\u00e3o por cera perdida oferece uma liberdade de projeto excepcional. Ela permite geometrias complexas, paredes finas, passagens internas com o uso de n\u00facleos cer\u00e2micos e excelentes acabamentos de superf\u00edcie (normalmente Ra 3,2\u20136,3 \u00b5m) com toler\u00e2ncias lineares em conformidade com a norma ISO 8062 CT4\u2013CT6. A\u00e7o inoxid\u00e1vel, a\u00e7o carbono, alum\u00ednio e ligas de a\u00e7o est\u00e3o entre os materiais mais comumente fundidos.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Processo padr\u00e3o de fundi\u00e7\u00e3o por cera perdida em 8 etapas<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Embora o conceito b\u00e1sico remonte a milhares de anos, a fundi\u00e7\u00e3o por inje\u00e7\u00e3o industrial moderna segue um processo de engenharia altamente controlado e composto por v\u00e1rias etapas:<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 1: Ferramentas met\u00e1licas (fabrica\u00e7\u00e3o de matrizes)<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Os engenheiros de fundi\u00e7\u00e3o criam um molde met\u00e1lico de precis\u00e3o (geralmente usinado em alum\u00ednio ou a\u00e7o) com base no projeto CAD 3D do cliente. A cavidade do molde leva em conta as toler\u00e2ncias de retra\u00e7\u00e3o tanto durante o resfriamento da cera quanto durante a solidifica\u00e7\u00e3o do metal.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 2: Inje\u00e7\u00e3o no molde de cera<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">A cera derretida \u00e9 injetada sob press\u00e3o no molde met\u00e1lico e deixada para esfriar. Depois de ejetada, essa r\u00e9plica serve como modelo de cera para a fundi\u00e7\u00e3o final. No caso de geometrias ocas ou com complexidade interna, s\u00e3o inseridos n\u00facleos de cer\u00e2mica antes da inje\u00e7\u00e3o da cera.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 3: Montagem da \u00e1rvore de padr\u00f5es<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Os moldes individuais de cera s\u00e3o soldados a um sistema central de canais de cera (canal principal, canais secund\u00e1rios e canais de alimenta\u00e7\u00e3o) por meio de uma ferramenta aquecida. Esse conjunto em forma de \u00e1rvore permite que dezenas ou centenas de pequenos componentes sejam fundidos em uma \u00fanica opera\u00e7\u00e3o de fundi\u00e7\u00e3o.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 4: Constru\u00e7\u00e3o da camada cer\u00e2mica (revestimento)<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">A \u00e1rvore de cera \u00e9 mergulhada em uma pasta refrat\u00e1ria fina (s\u00edlica, zirc\u00e3o ou alumina) e, em seguida, revestida com areia cer\u00e2mica seca (estuque). Esse processo \u00e9 repetido de 5 a 9 vezes at\u00e9 que se forme uma camada cer\u00e2mica resistente ao redor do aglomerado de cera.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 5: Remo\u00e7\u00e3o da cera e sinteriza\u00e7\u00e3o<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">A \u00e1rvore revestida com cer\u00e2mica \u00e9 colocada em uma autoclave de vapor de alta press\u00e3o para derreter a cera rapidamente, deixando um molde cer\u00e2mico oco. Em seguida, o molde \u00e9 queimado em um forno de queima a temperaturas entre 870 \u00b0C e 1.100 \u00b0C para eliminar os res\u00edduos restantes, curar a cer\u00e2mica e pr\u00e9-aquecer a estrutura para o vazamento.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 6: Fundi\u00e7\u00e3o de metal<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">O metal fundido \u2014 aquecido em um forno de indu\u00e7\u00e3o \u2014 \u00e9 vertido no molde cer\u00e2mico pr\u00e9-aquecido por meio de t\u00e9cnicas de fundi\u00e7\u00e3o por gravidade, v\u00e1cuo ou press\u00e3o. O pr\u00e9-aquecimento evita o choque t\u00e9rmico e permite que as partes finas sejam preenchidas uniformemente.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 7: Remo\u00e7\u00e3o do n\u00facleo e da carca\u00e7a<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Depois que o metal esfria e se solidifica, o inv\u00f3lucro cer\u00e2mico externo \u00e9 submetido a vibra\u00e7\u00e3o, jateamento com abrasivo, jato de \u00e1gua ou dissolu\u00e7\u00e3o qu\u00edmica para liberar as pe\u00e7as fundidas de metal.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Etapa 8: Corte e acabamento<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">As pe\u00e7as met\u00e1licas individuais s\u00e3o cortadas da haste central. Os res\u00edduos dos canais de alimenta\u00e7\u00e3o s\u00e3o lixados at\u00e9 ficarem planos. As pe\u00e7as podem passar por tratamento t\u00e9rmico, usinagem CNC para toler\u00e2ncias ultraprecisas, polimento de superf\u00edcie ou ensaios n\u00e3o destrutivos (NDT) antes da inspe\u00e7\u00e3o final.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Fundi\u00e7\u00e3o por investimento x Fundi\u00e7\u00e3o em areia x Fundi\u00e7\u00e3o sob press\u00e3o<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">A escolha do processo de fundi\u00e7\u00e3o adequado depende do volume de produ\u00e7\u00e3o, da precis\u00e3o dimensional, do acabamento superficial e da sele\u00e7\u00e3o da liga:<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\"><table><thead><tr><th>Recurso do processo<\/th><th>Fundi\u00e7\u00e3o por revestimento<\/th><th>Fundi\u00e7\u00e3o em areia<\/th><th>Fundi\u00e7\u00e3o sob press\u00e3o<\/th><\/tr><\/thead><tbody><tr><td><strong>Toler\u00e2ncia dimensional<\/strong><\/td><td>Alta (ISO 8062 CT4-CT6)<\/td><td>Baixo (ISO 8062 CT8-CT10)<\/td><td>Muito alta (ISO 8062 CT3-CT5)<\/td><\/tr><tr><td><strong>Acabamento superficial (Ra)<\/strong><\/td><td>3,2 \u2013 6,3 \u00b5m<\/td><td>12,5 \u2013 25 \u00b5m<\/td><td>1,6 \u2013 3,2 \u00b5m<\/td><\/tr><tr><td><strong>Complexidade do projeto<\/strong><\/td><td>Extremamente alto (complexo\/oco)<\/td><td>Moderado<\/td><td>Moderado a alto<\/td><\/tr><tr><td><strong>Espessura m\u00ednima da parede<\/strong><\/td><td>1,5 mm<\/td><td>3,0 \u2013 5,0 mm<\/td><td>1,0 \u2013 1,5 mm<\/td><\/tr><tr><td><strong>Custo de ferramentas<\/strong><\/td><td>Moderado<\/td><td>Baixa<\/td><td>Alta<\/td><\/tr><tr><td><strong>Compatibilidade de materiais<\/strong><\/td><td>Ligas ferrosas e n\u00e3o ferrosas<\/td><td>Quase todos os metais<\/td><td>Metais n\u00e3o ferrosos (Al, Zn, Mg)<\/td><\/tr><\/tbody><\/table><\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Principais vantagens da fundi\u00e7\u00e3o por cera perdida<\/h2>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>Complexidade geom\u00e9trica excepcional:<\/strong> Capaz de moldar paredes finas, recortes e canais internos complexos utilizando n\u00facleos de cer\u00e2mica.<\/li>\r\n\r\n\r\n\r\n<li><strong>Qualidade superior da superf\u00edcie:<\/strong> O acabamento liso da superf\u00edcie reduz ou elimina a necessidade de usinagem secund\u00e1ria.<\/li>\r\n\r\n\r\n\r\n<li><strong>Alta utiliza\u00e7\u00e3o do material:<\/strong> O m\u00ednimo desperd\u00edcio de material torna essa solu\u00e7\u00e3o economicamente vi\u00e1vel para ligas de alto valor, como o a\u00e7o inoxid\u00e1vel, o cobalto e as ligas de n\u00edquel.<\/li>\r\n\r\n\r\n\r\n<li><strong>Alta precis\u00e3o dimensional:<\/strong> Produz pe\u00e7as precisas de forma consistente, lote ap\u00f3s lote, sendo ideal para aplica\u00e7\u00f5es cr\u00edticas de engenharia.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Aplica\u00e7\u00f5es industriais comuns<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">A fundi\u00e7\u00e3o por cera perdida atende a setores cr\u00edticos que exigem integridade estrutural e precis\u00e3o:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>Aeroespacial e Energia:<\/strong> P\u00e1s de turbina, aletas, componentes do sistema de combust\u00e3o e acess\u00f3rios estruturais.<\/li>\r\n\r\n\r\n\r\n<li><strong>V\u00e1lvulas e bombas industriais:<\/strong> Impulsores de bombas, corpos de v\u00e1lvulas, atuadores e componentes de tubula\u00e7\u00e3o.<\/li>\r\n\r\n\r\n\r\n<li><strong>Automotivo e Transportes:<\/strong> Rodas do turbocompressor, balancins e suportes personalizados.<\/li>\r\n\r\n\r\n\r\n<li><strong>Equipamentos m\u00e9dicos:<\/strong> Instrumentos cir\u00fargicos, implantes ortop\u00e9dicos e pr\u00f3teses articulares.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Solu\u00e7\u00f5es personalizadas de fundi\u00e7\u00e3o por cera perdida na METALPIE<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Em <strong>METALPIE<\/strong>, somos especializados em servi\u00e7os de fundi\u00e7\u00e3o por cera perdida de alta precis\u00e3o, adaptados \u00e0s suas necessidades espec\u00edficas de fabrica\u00e7\u00e3o. Desde a sele\u00e7\u00e3o de materiais e o projeto de moldes at\u00e9 o usinagem de precis\u00e3o e o controle de qualidade, nossa equipe de engenharia garante que suas pe\u00e7as atendam a rigorosos padr\u00f5es dimensionais e de desempenho.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><strong>Tem algum projeto em mente?<\/strong> <a href=\"https:\/\/metalpie.com\/pt\/entre-em-contato-conosco\/\">Entre em contato com nossa equipe de engenharia hoje mesmo<\/a> ou envie seus desenhos CAD em 3D (STEP\/IGES) para receber um or\u00e7amento r\u00e1pido e competitivo.<\/p>","protected":false},"excerpt":{"rendered":"<p>A fundi\u00e7\u00e3o de metais continua sendo um pilar da manufatura moderna, fornecendo componentes precisos para diversos setores. Entre as v\u00e1rias t\u00e9cnicas, o processo de fundi\u00e7\u00e3o por cera perdida (tamb\u00e9m conhecido como fundi\u00e7\u00e3o por investimento) se destaca por sua capacidade de produzir pe\u00e7as met\u00e1licas complexas e de alta precis\u00e3o, com acabamentos superficiais superiores e desperd\u00edcio m\u00ednimo de material. O que \u00e9 a fundi\u00e7\u00e3o por cera perdida? A fundi\u00e7\u00e3o por cera perdida \u00e9 um processo de conforma\u00e7\u00e3o de metais de precis\u00e3o\u2026<\/p>","protected":false},"author":13,"featured_media":13832,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-13767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-metal-casting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Investment Casting Process | Application and Pros &amp; Cons | METALPIE<\/title>\n<meta name=\"description\" content=\"The investment casting process is a popular Metal casting process in the world.This article described the whole casting process step by step.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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