{"id":51154,"date":"2025-10-25T12:19:28","date_gmt":"2025-10-25T04:19:28","guid":{"rendered":"https:\/\/zetarmold.com\/?p=51154"},"modified":"2026-04-09T08:08:30","modified_gmt":"2026-04-09T00:08:30","slug":"o-que-sao-normas-de-tolerancia-de-moldes-de-borracha-de-silicone","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/pt\/o-que-sao-normas-de-tolerancia-de-moldes-de-borracha-de-silicone\/","title":{"rendered":"O que s\u00e3o padr\u00f5es de toler\u00e2ncia de molde de borracha de silicone?"},"content":{"rendered":"<\/p>\n<p>Borracha de silicone (frequentemente designada por <em>elast\u00f3mero de silicone<\/em>) \u00e9 amplamente utilizado em veda\u00e7\u00f5es, juntas, componentes m\u00e9dicos e bens de consumo. Ao contr\u00e1rio dos metais ou pl\u00e1sticos, o silicone comporta-se de forma el\u00e1stica - estica, comprime e encolhe mais durante a moldagem e a p\u00f3s-cura.<br \/>\nPor conseguinte, a defini\u00e7\u00e3o de <strong>toler\u00e2ncias dimensionais<\/strong> para pe\u00e7as de silicone requer uma mentalidade diferente da utilizada para materiais r\u00edgidos.<\/p>\n<p>Este artigo explica que normas de toler\u00e2ncia se aplicam a pe\u00e7as moldadas em borracha de silicone, como interpret\u00e1-las, que toler\u00e2ncias pr\u00e1ticas s\u00e3o poss\u00edveis e como comunic\u00e1-las claramente em desenhos ou pedidos de cota\u00e7\u00e3o.<\/p>\n<h2>Que normas se aplicam?<\/h2>\n<p>As pe\u00e7as de borracha de silicone s\u00e3o regidas por normas gerais de toler\u00e2ncia de borracha e n\u00e3o de pl\u00e1stico ou metal. As principais refer\u00eancias s\u00e3o:<\/p>\n<ul>\n<li><strong>ISO 3302-1:<\/strong> <em>Borracha - Toler\u00e2ncias para produtos - Parte 1: Toler\u00e2ncias dimensionais<\/em>  <\/li>\n<li><strong>GB\/T 3672.1-2002:<\/strong> Norma chinesa equivalente \u00e0 ISO 3302-1  <\/li>\n<li><strong>DIN 7715:<\/strong> Norma alem\u00e3 mais antiga (maioritariamente substitu\u00edda pela ISO)<\/li>\n<\/ul>\n<p>Estes documentos definem classes de toler\u00e2ncia (M1-M4) e limites dimensionais com base na gama de tamanhos e requisitos de precis\u00e3o.<\/p>\n<\/p>\n<h2>Classes de toler\u00e2ncia (M1-M4)<\/h2>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Classe<\/th>\n<th style=\"text-align: left;\">Descri\u00e7\u00e3o<\/th>\n<th style=\"text-align: left;\">Aplica\u00e7\u00f5es t\u00edpicas<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>M1<\/strong><\/td>\n<td style=\"text-align: left;\">A mais alta precis\u00e3o<\/td>\n<td style=\"text-align: left;\">Pe\u00e7as m\u00e9dicas, componentes de veda\u00e7\u00e3o estanques<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>M2<\/strong><\/td>\n<td style=\"text-align: left;\">Alta precis\u00e3o<\/td>\n<td style=\"text-align: left;\">Vedantes industriais, interfaces mec\u00e2nicas<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>M3<\/strong><\/td>\n<td style=\"text-align: left;\">Precis\u00e3o geral<\/td>\n<td style=\"text-align: left;\">Pe\u00e7as de silicone moldadas standard<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>M4<\/strong><\/td>\n<td style=\"text-align: left;\">Baixa precis\u00e3o<\/td>\n<td style=\"text-align: left;\">Artigos n\u00e3o cr\u00edticos grandes ou macios<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote>\n<p>\ud83d\udd39 Utiliza\u00e7\u00e3o <strong>M1\/M2<\/strong> para ajustes precisos, <strong>M3<\/strong> para componentes gerais, <strong>M4<\/strong> quando as dimens\u00f5es n\u00e3o s\u00e3o cr\u00edticas.<\/p>\n<\/blockquote>\n<h2>Retra\u00e7\u00e3o e compensa\u00e7\u00e3o t\u00edpicas do silicone<\/h2>\n<p>O silicone apresenta uma contra\u00e7\u00e3o relativamente elevada e vari\u00e1vel durante a moldagem.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Fator<\/th>\n<th style=\"text-align: left;\">Valor t\u00edpico \/ Intervalo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Intervalo de retra\u00e7\u00e3o<\/strong><\/td>\n<td style=\"text-align: left;\">1,5% - 3,0% (m\u00e9dia \u22482,0%)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>LSR (silicone l\u00edquido)<\/strong><\/td>\n<td style=\"text-align: left;\">Encolhimento menor e mais consistente<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Silicone s\u00f3lido (VMQ)<\/strong><\/td>\n<td style=\"text-align: left;\">Ligeiramente superior e menos uniforme<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Altera\u00e7\u00e3o dimensional p\u00f3s-cura<\/strong><\/td>\n<td style=\"text-align: left;\">0,1% - 0,5% de retra\u00e7\u00e3o adicional<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Sugest\u00e3o de design:<\/strong><br \/>\nAo projetar moldes, compensar a retra\u00e7\u00e3o (normalmente +2%) na dimens\u00e3o da cavidade. Documentar o encolhimento assumido e confirmar durante a inspe\u00e7\u00e3o do primeiro artigo.<\/p>\n<h2>Tabela de refer\u00eancia de toler\u00e2ncias pr\u00e1ticas<\/h2>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: center;\">Tamanho nominal (mm)<\/th>\n<th style=\"text-align: center;\">M1 (mm)<\/th>\n<th style=\"text-align: center;\">M2 (mm)<\/th>\n<th style=\"text-align: center;\">M3 (mm)<\/th>\n<th style=\"text-align: center;\">M4 (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: center;\">0 - 6<\/td>\n<td style=\"text-align: center;\">\u00b10.08<\/td>\n<td style=\"text-align: center;\">\u00b10.10<\/td>\n<td style=\"text-align: center;\">\u00b10.20<\/td>\n<td style=\"text-align: center;\">\u00b10.30<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">6 - 10<\/td>\n<td style=\"text-align: center;\">\u00b10.10<\/td>\n<td style=\"text-align: center;\">\u00b10.15<\/td>\n<td style=\"text-align: center;\">\u00b10.25<\/td>\n<td style=\"text-align: center;\">\u00b10.40<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">10 - 18<\/td>\n<td style=\"text-align: center;\">\u00b10.13<\/td>\n<td style=\"text-align: center;\">\u00b10.20<\/td>\n<td style=\"text-align: center;\">\u00b10.35<\/td>\n<td style=\"text-align: center;\">\u00b10.50<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">18 - 30<\/td>\n<td style=\"text-align: center;\">\u00b10.16<\/td>\n<td style=\"text-align: center;\">\u00b10.25<\/td>\n<td style=\"text-align: center;\">\u00b10.40<\/td>\n<td style=\"text-align: center;\">\u00b10.70<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">30 - 50<\/td>\n<td style=\"text-align: center;\">\u00b10.20<\/td>\n<td style=\"text-align: center;\">\u00b10.35<\/td>\n<td style=\"text-align: center;\">\u00b10.55<\/td>\n<td style=\"text-align: center;\">\u00b10.90<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">50 - 80<\/td>\n<td style=\"text-align: center;\">\u00b10.25<\/td>\n<td style=\"text-align: center;\">\u00b10.40<\/td>\n<td style=\"text-align: center;\">\u00b10.70<\/td>\n<td style=\"text-align: center;\">\u00b11.10<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">80 - 120<\/td>\n<td style=\"text-align: center;\">\u00b10.35<\/td>\n<td style=\"text-align: center;\">\u00b10.50<\/td>\n<td style=\"text-align: center;\">\u00b10.80<\/td>\n<td style=\"text-align: center;\">\u00b11.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote>\n<p>\u2699\ufe0f Para pe\u00e7as muito finas (&lt;1,0 mm) ou paredes macias, aumentar a toler\u00e2ncia em \u00b10,1-0,2 mm.<\/p>\n<\/blockquote>\n<h2>Diferen\u00e7as entre LSR e VMQ (silicone s\u00f3lido)<\/h2>\n<ul>\n<li>\n<p><strong>LSR (borracha de silicone l\u00edquida):<\/strong><\/p>\n<ul>\n<li>Moldado por inje\u00e7\u00e3o<\/li>\n<li>Excelente repetibilidade<\/li>\n<li>Menor varia\u00e7\u00e3o de retra\u00e7\u00e3o  <\/li>\n<li>Adequado para pe\u00e7as de alta precis\u00e3o (sensores m\u00e9dicos, autom\u00f3veis)<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>VMQ (Silicone s\u00f3lido):<\/strong><\/p>\n<ul>\n<li>Moldado por compress\u00e3o ou transfer\u00eancia<\/li>\n<li>Maior variabilidade na retra\u00e7\u00e3o e no acabamento da superf\u00edcie<\/li>\n<li>Custo mais baixo, adequado para pe\u00e7as de precis\u00e3o m\u00e9dia<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Diretrizes de medi\u00e7\u00e3o e inspe\u00e7\u00e3o<\/h2>\n<p>O silicone \u00e9 macio - a exatid\u00e3o da medi\u00e7\u00e3o depende muito das condi\u00e7\u00f5es.<br \/>\nDefinir claramente no desenho ou no documento de qualidade:<\/p>\n<ol>\n<li><strong>Temperatura de medi\u00e7\u00e3o:<\/strong> 23 \u00b1 2 \u00b0C  <\/li>\n<li><strong>Condicionamento:<\/strong> Medi\u00e7\u00e3o ap\u00f3s 24 h \u00e0 temperatura ambiente ap\u00f3s a cura  <\/li>\n<li><strong>Instrumentos de medi\u00e7\u00e3o:<\/strong> Calibradores de mand\u00edbula macia, projetor \u00f3tico ou CMM de baixa for\u00e7a  <\/li>\n<li><strong>For\u00e7a da sonda:<\/strong> \u22640,5 N para evitar a deforma\u00e7\u00e3o  <\/li>\n<li><strong>M\u00e9todo de apoio:<\/strong> Medir em estado livre ou sob compress\u00e3o definida  <\/li>\n<li><strong>Amostragem:<\/strong> Definir a quantidade de controlo (FAI 100%, AQL de produ\u00e7\u00e3o)<\/li>\n<\/ol>\n<p><strong>Sugest\u00e3o:<\/strong> Documentar a for\u00e7a de medi\u00e7\u00e3o, a fixa\u00e7\u00e3o e a orienta\u00e7\u00e3o no desenho para garantir a consist\u00eancia.<\/p>\n<\/p>\n<h2>Factores de conce\u00e7\u00e3o do molde que afectam as toler\u00e2ncias<\/h2>\n<ul>\n<li><strong>Material do molde e controlo da temperatura:<\/strong> Afecta a precis\u00e3o da cavidade e a repetibilidade da retra\u00e7\u00e3o  <\/li>\n<li><strong>Ventila\u00e7\u00e3o e port\u00f5es:<\/strong> Uma ventila\u00e7\u00e3o deficiente provoca flashes e distor\u00e7\u00e3o  <\/li>\n<li><strong>Espessura uniforme da parede:<\/strong> Evitar transi\u00e7\u00f5es de grande espessura  <\/li>\n<li><strong>P\u00f3s-cura:<\/strong> Estabiliza as dimens\u00f5es; especificar tempo e temperatura  <\/li>\n<li><strong>Manuten\u00e7\u00e3o de ferramentas:<\/strong> Verificar regularmente o desgaste da cavidade e atualizar as medidas<\/li>\n<\/ul>\n<p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" class=\"wp-image-53105\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets.webp\" alt=\"Plastic resin pellets for injection molding\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets.webp 1200w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets-1024x585.webp 1024w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets-768x438.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-plastic-resin-pellets-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Fornecimento de Fornecedores<\/figcaption><\/figure>\n<\/p>\n<h2>Recomenda\u00e7\u00f5es de superf\u00edcies e elementos<\/h2>\n<ul>\n<li>Evitar <strong>cantos afiados<\/strong>; utilizar raios de 0,5-1,5 mm  <\/li>\n<li>Manter <strong>altura do texto \u22650,5 mm<\/strong>, largura da linha \u22650,5 mm para facilitar a leitura  <\/li>\n<li>Para <strong>nervuras e paredes finas<\/strong>A espessura m\u00ednima deve ser de 0,8 mm (para silicone 50A)  <\/li>\n<li>Evitar cortes profundos, exceto se for absolutamente necess\u00e1rio<\/li>\n<\/ul>\n<p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" class=\"wp-image-53140\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2.webp\" alt=\"Injection molding production process\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2.webp 1200w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2-1024x585.webp 1024w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2-768x438.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/hdpe-injection-molding-process-v2-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Injection molding machine in production<\/figcaption><\/figure>\n<\/p>\n<h2>Como especificar toler\u00e2ncias em desenhos \/ solicita\u00e7\u00f5es de cota\u00e7\u00e3o<\/h2>\n<p>Inclua sempre estes pormenores quando criar um desenho ou uma ordem de compra:<\/p>\n<ul>\n<li><strong>Classe de toler\u00e2ncia por dimens\u00e3o:<\/strong> por exemplo. <code>\u00d830,00 \u00b10,20 mm (ISO 3302-1 M2)<\/code>  <\/li>\n<li><strong>Material e dureza:<\/strong> <code>Silicone VMQ 60 Shore A<\/code>  <\/li>\n<li><strong>Processo:<\/strong> <code>Moldado por compress\u00e3o<\/code> ou <code>LSR moldado por inje\u00e7\u00e3o<\/code>  <\/li>\n<li><strong>Hip\u00f3tese de retra\u00e7\u00e3o:<\/strong> <code>2.0% compensado no molde<\/code>  <\/li>\n<li><strong>Condi\u00e7\u00f5es de medi\u00e7\u00e3o:<\/strong> Temperatura, p\u00f3s-cura, ferramentas, for\u00e7a da sonda  <\/li>\n<li><strong>Acabamento da superf\u00edcie:<\/strong> Se necess\u00e1rio, definir o c\u00f3digo Ra ou de textura  <\/li>\n<li><strong>Requisitos de inspe\u00e7\u00e3o:<\/strong> Plano de amostragem FAI ou por lote  <\/li>\n<\/ul>\n<p><strong>Nota de desenho de exemplo:<\/strong><br \/>\nMaterial: LSR, 50 Shore A<br \/>\nToler\u00e2ncia: \u00b10,10 mm (ISO 3302-1 M2)<br \/>\nMedi\u00e7\u00e3o a 23 \u00b1 2\u00b0C ap\u00f3s 24h de p\u00f3s-cura<br \/>\nRetra\u00e7\u00e3o presumida 1.8% compensada na cavidade<br \/>\nProcesso: Moldagem por inje\u00e7\u00e3o<\/p>\n<p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" class=\"wp-image-53133\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1.webp\" alt=\"Mold tooling inspection with depth gauge\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1.webp 1200w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1-1024x585.webp 1024w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1-768x438.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/low-volume-mold-tooling-inspection-1-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Precision mold tooling inspection and measurement<\/figcaption><\/figure>\n<\/p>\n<h2>Inspe\u00e7\u00e3o e controlo estat\u00edstico<\/h2>\n<ul>\n<li><strong>Inspe\u00e7\u00e3o do primeiro artigo (FAI):<\/strong> Verificar as principais dimens\u00f5es antes da produ\u00e7\u00e3o em massa  <\/li>\n<li><strong>Capacidade do processo (Cpk\/Cp):<\/strong> Pista para pe\u00e7as de precis\u00e3o de grande volume  <\/li>\n<li><strong>Amostragem AQL:<\/strong> Para artigos n\u00e3o cr\u00edticos  <\/li>\n<li><strong>Gr\u00e1ficos de controlo:<\/strong> Monitorizar as principais carater\u00edsticas (ID\/OD, espessura)  <\/li>\n<\/ul>\n<p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" class=\"wp-image-53134\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1.webp\" alt=\"Prototype plastic parts batch\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1.webp 1200w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1-1024x585.webp 1024w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1-768x438.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/prototype-plastic-parts-batch-1-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Batch of injection molded plastic parts<\/figcaption><\/figure>\n<\/p>\n<h2>Erros comuns e correc\u00e7\u00f5es<\/h2>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Armadilha<\/th>\n<th style=\"text-align: left;\">Causa<\/th>\n<th style=\"text-align: left;\">Solu\u00e7\u00e3o<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">Esperar toler\u00e2ncias ao n\u00edvel do pl\u00e1stico<\/td>\n<td style=\"text-align: left;\">Elasticidade do silicone<\/td>\n<td style=\"text-align: left;\">Aplicar corretamente a norma ISO 3302-1 (M1-M4)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Incoer\u00eancia na medi\u00e7\u00e3o<\/td>\n<td style=\"text-align: left;\">M\u00e9todo n\u00e3o definido<\/td>\n<td style=\"text-align: left;\">Especificar a temperatura e a for\u00e7a da sonda<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Retra\u00e7\u00e3o p\u00f3s-cura n\u00e3o considerada<\/td>\n<td style=\"text-align: left;\">Relaxamento do material<\/td>\n<td style=\"text-align: left;\">Medida ap\u00f3s p\u00f3s-cura completa<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Geometria fina e flex\u00edvel<\/td>\n<td style=\"text-align: left;\">Supervis\u00e3o da conce\u00e7\u00e3o<\/td>\n<td style=\"text-align: left;\">Refor\u00e7ar as costelas, acrescentar filetes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Estudo de caso: Veda\u00e7\u00e3o de silicone de precis\u00e3o<\/h2>\n<p><strong>Parte:<\/strong> Junta LSR para sensor autom\u00f3vel<br \/>\n<strong>Material:<\/strong> LSR, 50 Shore A<br \/>\n<strong>Processo:<\/strong> <a href=\"https:\/\/zetarmold.com\/pt\/injection-molding-complete-guide\/\">Moldagem por inje\u00e7\u00e3o<\/a><br \/>\n<strong>Especificado:<\/strong> ID \u00d820,00 \u00b10,10 mm (M1), OD \u00d824,00 \u00b10,15 mm (M2)<br \/>\n<strong>P\u00f3s-cura:<\/strong> 2h a 200\u00b0C<br \/>\n<strong>Resultado:<\/strong>  <\/p>\n<ul>\n<li>Contra\u00e7\u00e3o real 1,6%  <\/li>\n<li>Ajustamento da cavidade do molde ap\u00f3s FAI  <\/li>\n<li>Cpk = 1,67 obtido ap\u00f3s a afina\u00e7\u00e3o  <\/li>\n<\/ul>\n<p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" class=\"wp-image-53108\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing.webp\" alt=\"Quality inspection of injection molded parts\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing.webp 1200w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing-1024x585.webp 1024w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing-768x438.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-quality-testing-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Quality inspection of injection molded plastic parts<\/figcaption><\/figure>\n<\/p>\n<h2>Perguntas mais frequentes<\/h2>\n<p><strong>Q1: As pe\u00e7as de silicone podem atingir uma toler\u00e2ncia de \u00b10,05 mm?<\/strong><br \/>\nApenas para elementos muito pequenos e r\u00edgidos ou pe\u00e7as LSR com controlo rigoroso do processo. As gamas normais s\u00e3o \u00b10,1-0,3 mm.<\/p>\n<p><strong>Q2: Devo definir toler\u00e2ncias para cada dimens\u00e3o?<\/strong><br \/>\nN\u00e3o. Aplicar notas gerais como \"Dimens\u00f5es n\u00e3o especificadas de acordo com a norma ISO 3302-1 M3\" e especificar toler\u00e2ncias mais apertadas apenas quando for cr\u00edtico.<\/p>\n<p><strong>Q3: Como especificar dimens\u00f5es comprimidas para vedantes?<\/strong><br \/>\nDefinir a dimens\u00e3o funcional sob compress\u00e3o ou adicionar uma nota como \"Medido \u00e0 compress\u00e3o 5%\".<\/p>\n<\/p>\n<h2>Conclus\u00e3o e lista de controlo<\/h2>\n<p>Para garantir o \u00eaxito da produ\u00e7\u00e3o de pe\u00e7as de borracha de silicone:<\/p>\n<ol>\n<li>Escolha o grau de toler\u00e2ncia correto (M1-M4).  <\/li>\n<li>Especificar o material, a dureza e o tipo de cura.  <\/li>\n<li>Definir o processo de moldagem (LSR, compress\u00e3o, transfer\u00eancia).  <\/li>\n<li>Pressuposto de retra\u00e7\u00e3o do documento.  <\/li>\n<li>Temperatura e ferramentas de medi\u00e7\u00e3o do Estado.  <\/li>\n<li>Exigir FAI e definir um plano de amostragem.  <\/li>\n<li>Evitar toler\u00e2ncias irrealistas ao n\u00edvel do pl\u00e1stico.  <\/li>\n<li>Manter a estabilidade das ferramentas e dos processos.<\/li>\n<\/ol>\n<p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" class=\"wp-image-53145\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1.webp\" alt=\"Injection molded plastic parts variety\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1.webp 1200w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1-1024x585.webp 1024w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1-768x438.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-molding-australia-plastic-parts-v2-1-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Various injection molded plastic parts<\/figcaption><\/figure>\n<\/p>\n<h2>Ap\u00eandice - Refer\u00eancia r\u00e1pida<\/h2>\n<p>Norma: ISO 3302-1 \/ GB\/T 3672.1<br \/>\nRetra\u00e7\u00e3o: 1,5% - 3,0% (base de projeto 2,0%)<br \/>\nClasses de toler\u00e2ncia: M1 (mais elevada) \/ M2 \/ M3 \/ M4 (mais baixa)<br \/>\nTemperatura de medi\u00e7\u00e3o: 23 \u00b1 2 \u00b0C<br \/>\nP\u00f3s-cura: Medida ap\u00f3s a cura completa<br \/>\nLSR: Melhor repetibilidade do que a moldagem por compress\u00e3o<\/p>\n<p><strong>Nota do autor:<\/strong><br \/>\nEste guia faz parte do nosso <em>S\u00e9rie de conhecimentos sobre moldagem de silicone<\/em>O objetivo \u00e9 ajudar os engenheiros e os compradores a definirem toler\u00e2ncias vi\u00e1veis e padr\u00e3o da ind\u00fastria para produtos de silicone.<\/p>\n<div style=\"background:#f0f4f8;padding:20px;border-radius:8px;margin-top:30px;\">\n<p style=\"margin:0 0 10px;font-size:18px;\"><strong>Need a Quote for Your Injection Molding Project?<\/strong><\/p>\n<p style=\"margin:0 0 10px;\">Get competitive pricing, DFM feedback, and production timeline from ZetarMold\u2019s engineering team.<\/p>\n<p style=\"margin:0;\"><a href=\"https:\/\/zetarmold.com\/pt\/contactar-nos\/\" style=\"background:#2563eb;color:white;padding:12px 24px;border-radius:6px;text-decoration:none;font-weight:bold;\">Request a Free Quote \u2192<\/a> See our <a href=\"https:\/\/zetarmold.com\/pt\/injection-mold-complete-guide\/\">Injection Mold Complete Guide<\/a> for a comprehensive overview.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>O silicone (frequentemente chamado elast\u00f4mero de silicone) \u00e9 amplamente utilizado em vedantes, juntas, componentes m\u00e9dicos e produtos de consumo. Ao contr\u00e1rio dos metais ou pl\u00e1sticos, o silicone comporta-se elasticamente \u2014 estica, comprime e contrai mais durante a moldagem e a post-cura. Por isso, definir toler\u00e2ncias dimensionais para componentes de silicone requer uma mentalidade diferente da dos materiais rigidizados. Este artigo explica quais toler\u00e2ncias [\u2026]<\/p>","protected":false},"author":1,"featured_media":51175,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"What Are Silicone Rubber Mold Tolerance Standards?","_seopress_titles_desc":"A detailed guide explaining silicone rubber mold tolerance standards, including ISO and GB\/T systems, shrinkage, tolerance tables, process effects,","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[65],"tags":[69,68,70,67,72,71,66],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/51154"}],"collection":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/comments?post=51154"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/51154\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media\/51175"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media?parent=51154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/categories?post=51154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/tags?post=51154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}