{"id":18873,"date":"2024-04-19T16:57:09","date_gmt":"2024-04-19T08:57:09","guid":{"rendered":"https:\/\/firstmold.com\/?p=18873"},"modified":"2025-07-15T13:33:18","modified_gmt":"2025-07-15T05:33:18","slug":"quality-and-acceptance-standards-for-injection-molded-parts","status":"publish","type":"post","link":"https:\/\/firstmold.com\/pt\/tips\/quality-and-acceptance-standards-for-injection-molded-parts\/","title":{"rendered":"Normas de qualidade e aceita\u00e7\u00e3o para pe\u00e7as moldadas por inje\u00e7\u00e3o convencionais"},"content":{"rendered":"<p>No artigo \"<a href=\"https:\/\/firstmold.com\/pt\/tips\/injection-molding-defects\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Defeitos de moldagem por inje\u00e7\u00e3o<\/strong><\/a>Referimos que os projectistas ou compradores de produtos devem ter um conhecimento detalhado dos defeitos de moldagem por inje\u00e7\u00e3o. Isto destina-se a facilitar a sua capacidade de realizar inspec\u00e7\u00f5es de qualidade claras das pe\u00e7as moldadas por inje\u00e7\u00e3o ap\u00f3s a entrada em funcionamento de uma f\u00e1brica para produzir produtos de pl\u00e1stico. Uma vez que cada empresa de conce\u00e7\u00e3o de produtos tem estruturas e apar\u00eancias de produtos diferentes, os compradores devem estabelecer as suas pr\u00f3prias normas de qualidade de moldagem por inje\u00e7\u00e3o ou crit\u00e9rios de aceita\u00e7\u00e3o para produtos moldados por inje\u00e7\u00e3o.<\/p>\n\n\n\n<p>A FirstMold n\u00e3o pode discutir o padr\u00e3o de qualidade de moldagem por inje\u00e7\u00e3o para cada produto espec\u00edfico. No entanto, podemos oferecer uma aceita\u00e7\u00e3o construtiva de sugest\u00f5es padr\u00e3o para componentes convencionais de moldagem por inje\u00e7\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-measurement-surfaces-the-observed-surfaces\">Superf\u00edcies de medi\u00e7\u00e3o: As superf\u00edcies observadas<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-class-a-surfaces\">Superf\u00edcies de classe A<\/h3>\n\n\n\n<p>As superf\u00edcies da classe A referem-se normalmente \u00e0s superf\u00edcies da conce\u00e7\u00e3o de produtos que t\u00eam de satisfazer os mais elevados padr\u00f5es est\u00e9ticos e que s\u00e3o facilmente vis\u00edveis em condi\u00e7\u00f5es normais de utiliza\u00e7\u00e3o.<\/p>\n\n\n\n<p>No fabrico de autom\u00f3veis e no design industrial, as superf\u00edcies de classe A s\u00e3o as que exigem os padr\u00f5es de apar\u00eancia mais rigorosos. Devem ser muito lisas, sem defeitos e possuir uma qualidade de superf\u00edcie extremamente elevada. Para atingir estes padr\u00f5es de qualidade de moldagem por inje\u00e7\u00e3o, as superf\u00edcies de Classe A s\u00e3o frequentemente submetidas a um processamento complexo para garantir que as suas superf\u00edcies s\u00e3o lisas e sem falhas.<\/p>\n\n\n\n<p>Al\u00e9m disso, a conce\u00e7\u00e3o das superf\u00edcies da classe A n\u00e3o se centra apenas nos efeitos visuais, mas considera tamb\u00e9m factores como a resist\u00eancia estrutural, a durabilidade e a funcionalidade.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-class-b-surfaces\">Superf\u00edcies de classe B<\/h3>\n\n\n\n<p>As superf\u00edcies da classe B referem-se \u00e0s \u00e1reas de um produto ou artigo que est\u00e3o expostas, mas n\u00e3o s\u00e3o vis\u00edveis de forma proeminente. Normalmente, trata-se de superf\u00edcies que n\u00e3o s\u00e3o vistas diretamente em condi\u00e7\u00f5es normais de utiliza\u00e7\u00e3o. Por exemplo, a parte de tr\u00e1s, o lado ou o fundo de uma caixa de cor podem ser definidos como superf\u00edcies da Classe B. Embora estas \u00e1reas sejam vis\u00edveis, n\u00e3o s\u00e3o o principal foco de vis\u00e3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-class-c-surfaces\">Superf\u00edcies de classe C<\/h3>\n\n\n\n<p>Trata-se das superf\u00edcies inferiores de conjuntos, estruturas ou superf\u00edcies de pe\u00e7as que est\u00e3o em contacto umas com as outras durante a montagem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-inspection-conditions\">Condi\u00e7\u00f5es de inspe\u00e7\u00e3o<\/h2>\n\n\n\n<p>1. Esta norma baseia-se no pressuposto de que a funcionalidade n\u00e3o \u00e9 afetada e \u00e9 comparada visualmente. Por conseguinte, n\u00e3o \u00e9 superior aos calibres de limite e \u00e0s normas especiais espec\u00edficas de moldagem por inje\u00e7\u00e3o.<\/p>\n\n\n\n<p>2. Normalmente, a inspe\u00e7\u00e3o visual \u00e9 feita a 30 cm durante 3-5 segundos. Se forem encontrados defeitos, o observador desloca-se para 50 cm e observa durante 3-7 segundos. Os defeitos que s\u00e3o dif\u00edceis de ver e n\u00e3o s\u00e3o muito \u00f3bvios s\u00e3o considerados OK.<\/p>\n\n\n\n<p>3. A fonte de luz de inspe\u00e7\u00e3o s\u00e3o as luzes fluorescentes utilizadas na f\u00e1brica de produ\u00e7\u00e3o, com uma acuidade visual de 0,7 ou superior.<\/p>\n\n\n\n<p>4. \u00c2ngulo de observa\u00e7\u00e3o: perpendicular \u00e0 superf\u00edcie observada e num \u00e2ngulo de 45 graus a partir de cima ou de baixo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-inspection-suggestions-for-conventional-injection-molding-quality-standards\">Sugest\u00f5es de inspe\u00e7\u00e3o para normas de qualidade de moldagem por inje\u00e7\u00e3o convencional<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-flashing\">Intermitente<\/h3>\n\n\n\n<p>Os orif\u00edcios de trompete, as casas dos bot\u00f5es, os orif\u00edcios dos interruptores e todos os orif\u00edcios de encaixe das pe\u00e7as m\u00f3veis n\u00e3o devem ser revestidos. As posi\u00e7\u00f5es ocultas das colunas e os revestimentos estruturais n\u00e3o devem afetar a montagem ou a funcionalidade. As \u00e1reas externas e potencialmente expostas que afectam a seguran\u00e7a devem ser suaves ao toque e n\u00e3o devem causar riscos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-deformation\">Deforma\u00e7\u00e3o<\/h3>\n\n\n\n<p>A deforma\u00e7\u00e3o do inv\u00f3lucro da base apoiado numa plataforma n\u00e3o deve exceder 0,3 mm, e a deforma\u00e7\u00e3o do inv\u00f3lucro da face correspondente tamb\u00e9m n\u00e3o deve exceder 0,3 mm. As deforma\u00e7\u00f5es noutras pe\u00e7as de pl\u00e1stico s\u00e3o aceit\u00e1veis, desde que n\u00e3o afectem a montagem ou a funcionalidade.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dimensions\">Dimens\u00f5es<\/h3>\n\n\n\n<p>Os requisitos dimensionais devem referir-se \u00e0 tabela e ser controlados de acordo com as seguintes toler\u00e2ncias:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><td><strong>Tipo de defeito<\/strong><\/td><td><strong>Classe A<\/strong><\/td><td><strong>Classe B<\/strong><\/td><td><strong>Classe C<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Fissuras<\/td><td>N\u00e3o autorizado<\/td><td>N\u00e3o autorizado<\/td><td>Permitido se n\u00e3o tiver impacto no aspeto ou na funcionalidade<\/td><\/tr><tr><td><a href=\"https:\/\/firstmold.com\/pt\/tips\/short-shot-in-injection-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Tiro curto<\/strong><\/a><\/td><td>N\u00e3o autorizado<\/td><td>N\u00e3o autorizado<\/td><td>Menor aceit\u00e1vel se n\u00e3o tiver impacto no aspeto ou na fun\u00e7\u00e3o<\/td><\/tr><tr><td><a href=\"https:\/\/firstmold.com\/pt\/tips\/splay-marks-silver-streaks-in-injeciton-molding\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Raias de prata<\/strong><\/a><\/td><td>Norma m\u00ednima de acordo com a amostra de engenharia<\/td><td>Norma m\u00ednima de acordo com a amostra de engenharia<\/td><td>Norma m\u00ednima de acordo com a amostra de engenharia<\/td><\/tr><tr><td><a href=\"https:\/\/firstmold.com\/pt\/tips\/sink-marks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Marca de pia<\/strong><\/a><\/td><td>Norma m\u00ednima, sem marcas vis\u00edveis ou depress\u00f5es t\u00e1cteis de 45\u00b0 a 90\u00b0<\/td><td>Norma m\u00ednima, sem marcas vis\u00edveis ou depress\u00f5es t\u00e1cteis de 45\u00b0 a 90\u00b0<\/td><td>Norma m\u00ednima, sem marcas vis\u00edveis ou depress\u00f5es t\u00e1cteis de 45\u00b0 a 90\u00b0<\/td><\/tr><tr><td><a href=\"https:\/\/firstmold.com\/pt\/tips\/black-spots-and-black-specks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Manchas escuras\/misturas de cores\/manchas<\/strong><\/a><\/td><td>N\u00e3o mais de 2 posi\u00e7\u00f5es, separa\u00e7\u00e3o &gt;100mm, cada &lt;0,4mm\u00b2<\/td><td>N\u00e3o mais de 3 posi\u00e7\u00f5es, separa\u00e7\u00e3o &gt;100mm, cada &lt;0,5mm\u00b2<\/td><td>N\u00e3o mais de 4 posi\u00e7\u00f5es, separa\u00e7\u00e3o &gt;100mm, cada &lt;0,9mm\u00b2<\/td><\/tr><tr><td>Arranh\u00f5es\/Impactos<\/td><td>Cada um com um comprimento n\u00e3o superior a 8 mm e uma largura n\u00e3o superior a 0,05 mm<\/td><td>Cada um com um comprimento n\u00e3o superior a 10 mm e uma largura n\u00e3o superior a 0,1 mm<\/td><td>Cada uma com um comprimento n\u00e3o superior a 2,5 mm e uma largura n\u00e3o superior a 0,15 mm<\/td><\/tr><tr><td><a href=\"https:\/\/firstmold.com\/pt\/tips\/ejector-pin-marks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Marcas de eje\u00e7\u00e3o<\/strong><\/a><\/td><td>N\u00e3o autorizado<\/td><td>N\u00e3o autorizado<\/td><td>Aceit\u00e1vel se n\u00e3o tiver impacto visual, nem sali\u00eancia funcional<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-gate-vestiges\">Vest\u00edgios do port\u00e3o<\/h3>\n\n\n\n<p>1. As \u00e1reas expostas ou potencialmente expostas (por exemplo, portas de baterias) que podem afetar tanto o aspeto como as normas de seguran\u00e7a devem ter posi\u00e7\u00f5es de porta planas e cumprir as normas de seguran\u00e7a para garantir que n\u00e3o causam riscos.<\/p>\n\n\n\n<p>2. Os vest\u00edgios de porta que tenham requisitos de montagem, mas que n\u00e3o devam ser expostos e n\u00e3o afectem a montagem, devem ser controlados at\u00e9 0,5 mm e n\u00e3o devem afetar a funcionalidade.<\/p>\n\n\n\n<p>3. O port\u00e3o sem necessidade de montagem, que n\u00e3o afecte a funcionalidade e que n\u00e3o esteja exposto, deve ser controlado com uma margem de 1,5 mm. As posi\u00e7\u00f5es do port\u00e3o podem ter uma forma de rutura livre.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><td><strong>Gama de dimens\u00f5es (mm)<\/strong><\/td><td><strong>Toler\u00e2ncia (mm)<\/strong><\/td><\/tr><\/thead><tbody><tr><td>0 - 10<\/td><td>\u00b10.05<\/td><\/tr><tr><td>10.1 - 50<\/td><td>\u00b10.10<\/td><\/tr><tr><td>50.1 - 100<\/td><td>\u00b10.15<\/td><\/tr><tr><td>100.1 - 200<\/td><td>\u00b10.20<\/td><\/tr><tr><td>Mais de 200<\/td><td>\u00b10.25<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-in-conclusion\">Em conclus\u00e3o<\/h2>\n\n\n\n<p>Em circunst\u00e2ncias normais, as normas de aceita\u00e7\u00e3o da qualidade dos produtos moldados por inje\u00e7\u00e3o para os compradores s\u00e3o muito mais complexas do que as sugest\u00f5es acima mencionadas. Podem envolver aspectos como a embalagem do produto, a rotulagem, o tratamento de superf\u00edcie, o aspeto, a estrutura, o desempenho, a facilidade de utiliza\u00e7\u00e3o, a funcionalidade de montagem, entre outros. Por conseguinte, deve criar um conjunto detalhado de crit\u00e9rios de aceita\u00e7\u00e3o com base nas suas necessidades espec\u00edficas para garantir que os produtos acabados do seu fornecedor cumprem as suas normas de qualidade de moldagem por inje\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>Normas recomendadas de qualidade \/ aceita\u00e7\u00e3o \/ inspe\u00e7\u00e3o de produtos moldados por inje\u00e7\u00e3o de pl\u00e1stico de grandes f\u00e1bricas de moldagem por inje\u00e7\u00e3o<\/p>","protected":false},"author":5,"featured_media":18875,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[48],"tags":[51],"class_list":["post-18873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tips","tag-injection-molding"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Injection Molding Quality Standards | Plastic Parts Criteria<\/title>\n<meta name=\"description\" content=\"Recommended plastic injection molded product quality \/ acceptance \/ inspection standards from large injection molding factories\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/firstmold.com\/pt\/tips\/quality-and-acceptance-standards-for-injection-molded-parts\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quality And Acceptance Standards For Conventional Injection Molded Parts\" \/>\n<meta property=\"og:description\" content=\"Recommended plastic injection molded product quality \/ acceptance \/ inspection standards from large injection molding factories\" \/>\n<meta property=\"og:url\" content=\"https:\/\/firstmold.com\/pt\/tips\/quality-and-acceptance-standards-for-injection-molded-parts\/\" \/>\n<meta property=\"og:site_name\" content=\"First Mold\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.youtube.com\/@firstmold\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-19T08:57:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-15T05:33:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/04\/injection-molding-quality-standards-featured-image-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"James Li\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@firstmold2011\" \/>\n<meta name=\"twitter:site\" content=\"@firstmold2011\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"James Li\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/firstmold.com\\\/tips\\\/quality-and-acceptance-standards-for-injection-molded-parts\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/firstmold.com\\\/tips\\\/quality-and-acceptance-standards-for-injection-molded-parts\\\/\"},\"author\":{\"name\":\"James Li\",\"@id\":\"https:\\\/\\\/firstmold.com\\\/#\\\/schema\\\/person\\\/41882a87bad7ee7a4cab1e8b0b75a0ae\"},\"headline\":\"Quality And Acceptance Standards For Conventional Injection Molded Parts\",\"datePublished\":\"2024-04-19T08:57:09+00:00\",\"dateModified\":\"2025-07-15T05:33:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/firstmold.com\\\/tips\\\/quality-and-acceptance-standards-for-injection-molded-parts\\\/\"},\"wordCount\":861,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/firstmold.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/firstmold.com\\\/tips\\\/quality-and-acceptance-standards-for-injection-molded-parts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/firstmold.com\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/injection-molding-quality-standards-featured-image-1.jpg\",\"keywords\":[\"Injection Molding\"],\"articleSection\":[\"Tips &amp; 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