{"id":4369,"date":"2026-06-10T10:10:28","date_gmt":"2026-06-10T10:10:28","guid":{"rendered":"https:\/\/pfmscreen.com\/news-events\/welded-framed-pleated-extruder-screen-packs\/"},"modified":"2026-06-22T08:20:27","modified_gmt":"2026-06-22T08:20:27","slug":"conjuntos-de-telas-extrusoras-plissadas-com-estrutura-soldada","status":"publish","type":"post","link":"https:\/\/pfmscreen.com\/pt\/blogs\/welded-framed-pleated-extruder-screen-packs\/","title":{"rendered":"Conjuntos de telas para extrusoras: soldadas, emolduradas ou plissadas: qual \u00e9 a ideal para o seu processo?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Ao escolher telas para extrusoras, uma das primeiras decis\u00f5es que voc\u00ea ter\u00e1 que tomar \u00e9 o tipo de constru\u00e7\u00e3o: <strong>soldado<\/strong>, <strong>emoldurado<\/strong>, ou <strong>plissado<\/strong>. Cada modelo possui caracter\u00edsticas estruturais distintas, desempenho de filtragem e adequa\u00e7\u00e3o a diferentes condi\u00e7\u00f5es de extrus\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Escolher o tipo errado leva \u00e0 falha prematura da tela, aumento da queda de press\u00e3o, trocas mais frequentes e, em \u00faltima an\u00e1lise, custos operacionais mais elevados. Este guia oferece uma compara\u00e7\u00e3o t\u00e9cnica clara para que voc\u00ea possa tomar a decis\u00e3o certa.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-what-is-an-extruder-screen-pack\" class=\"wp-block-heading\">O que \u00e9 um conjunto de telas para extrusora?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O conjunto de telas fica localizado no adaptador da matriz ou no trocador de telas, entre a rosca da extrusora e a matriz. Sua fun\u00e7\u00e3o \u00e9:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Filtrar contaminantes s\u00f3lidos e g\u00e9is da massa polim\u00e9rica fundida.<\/li>\n\n\n\n<li>Aumentar a contrapress\u00e3o para melhorar a homogeneidade da fus\u00e3o.<\/li>\n\n\n\n<li>Proteja as ferramentas subsequentes (matrizes, bombas de engrenagem, fieiras).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A maioria das telas de prote\u00e7\u00e3o consiste em uma ou mais camadas de malha de arame tran\u00e7ado \u2014 mas a forma como essas camadas s\u00e3o unidas define o tipo de tela.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-construction-type-1-welded-screen-packs\" class=\"wp-block-heading\">Tipo de constru\u00e7\u00e3o 1: Conjuntos de telas soldadas<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/pfmscreen.com\/pt\/elementos-de-filtro-de-malha\/telas-de-extrusao\/conjuntos-de-telas-extrusoras-soldadas\/\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Welded-Extruder-Screen-Packs.jpg\" alt=\"Conjuntos de telas extrusoras soldadas\" class=\"wp-image-2273\" srcset=\"https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Welded-Extruder-Screen-Packs.jpg 600w, https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Welded-Extruder-Screen-Packs-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure>\n\n\n\n<h3 id=\"h-how-they-re-made\" class=\"wp-block-heading\">Como s\u00e3o feitos<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os conjuntos de telas soldadas s\u00e3o fabricados atrav\u00e9s da soldagem por resist\u00eancia das camadas da malha nas bordas ou em uma grade de pontos de solda. N\u00e3o se utiliza nenhuma estrutura. A solda funde os fios da malha diretamente.<\/p>\n\n\n\n<h3 id=\"h-key-characteristics\" class=\"wp-block-heading\">Principais caracter\u00edsticas<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Propriedade<\/th><th>Detalhe<\/th><\/tr><\/thead><tbody><tr><td>Tratamento de borda<\/td><td>Per\u00edmetro soldado (sem moldura)<\/td><\/tr><tr><td>Grossura<\/td><td>Fino \u2014 normalmente de 1 a 4 mm no total.<\/td><\/tr><tr><td>Rigidez<\/td><td>Moderado \u2014 os pontos de solda impedem a separa\u00e7\u00e3o das camadas.<\/td><\/tr><tr><td>Press\u00e3o m\u00e1xima de opera\u00e7\u00e3o<\/td><td>At\u00e9 aproximadamente 200\u2013250 bar, dependendo da especifica\u00e7\u00e3o da malha.<\/td><\/tr><tr><td>facilidade de limpeza<\/td><td>Normalmente n\u00e3o \u00e9 limpo; de uso \u00fanico.<\/td><\/tr><tr><td>Configura\u00e7\u00f5es comuns<\/td><td>Quadrado, circular, formatos personalizados<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"h-when-to-choose-welded\" class=\"wp-block-heading\">Quando escolher a soldagem<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pacotes soldados funcionam melhor em <strong>contamina\u00e7\u00e3o moderada, viscosidade m\u00e9dia<\/strong> processos de extrus\u00e3o onde:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A placa de troca ou quebra de tela fornece suporte estrutural.<\/li>\n\n\n\n<li>Voc\u00ea precisa de um <strong>pacote fino<\/strong> que se encaixa em recessos rasos de placas de disjuntor<\/li>\n\n\n\n<li>A integridade das camadas durante a instala\u00e7\u00e3o \u00e9 crucial (as camadas n\u00e3o podem deslizar ou se deslocar).<\/li>\n\n\n\n<li>Voc\u00ea est\u00e1 correndo <strong>PE, PP, PS ou ABS<\/strong> sob press\u00f5es de extrus\u00e3o padr\u00e3o<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Aplica\u00e7\u00f5es t\u00edpicas:<\/strong> Filme soprado, extrus\u00e3o de tubos, extrus\u00e3o de chapas, extrus\u00e3o de perfis<\/p>\n\n\n\n<h3 id=\"h-limitations\" class=\"wp-block-heading\">Limita\u00e7\u00f5es<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Os pontos de solda podem causar interrup\u00e7\u00f5es no fluxo perto das bordas.<\/li>\n\n\n\n<li>N\u00e3o \u00e9 adequado para press\u00f5es muito elevadas sem suporte adicional da estrutura.<\/li>\n\n\n\n<li>Menor \u00e1rea de superf\u00edcie do que os modelos plissados com a mesma \u00e1rea de ocupa\u00e7\u00e3o.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-construction-type-2-framed-screen-packs\" class=\"wp-block-heading\">Tipo de constru\u00e7\u00e3o 2: Conjuntos de telas emolduradas<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/pfmscreen.com\/pt\/elementos-de-filtro-de-malha\/telas-de-extrusao\/pacotes-de-telas-extrusoras-de-quadro\/\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Framed-Extruder-Screen-Packs-2.jpg\" alt=\"Pacotes de telas de extrus\u00e3o emolduradas\" class=\"wp-image-2367\" srcset=\"https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Framed-Extruder-Screen-Packs-2.jpg 600w, https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Framed-Extruder-Screen-Packs-2-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure>\n\n\n\n<h3 id=\"h-how-they-re-made-0\" class=\"wp-block-heading\">Como s\u00e3o feitos<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os conjuntos de telas emolduradas encapsulam uma ou mais camadas de malha dentro de um anel ou moldura r\u00edgida de metal \u2014 geralmente a\u00e7o inoxid\u00e1vel ou a\u00e7o carbono. A moldura \u00e9 encaixada sob press\u00e3o ou soldada ao redor do di\u00e2metro externo ou per\u00edmetro do conjunto de telas.<\/p>\n\n\n\n<h3 id=\"h-key-characteristics-0\" class=\"wp-block-heading\">Principais caracter\u00edsticas<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Propriedade<\/th><th>Detalhe<\/th><\/tr><\/thead><tbody><tr><td>Tratamento de borda<\/td><td>Estrutura met\u00e1lica r\u00edgida (borda circular ou quadrada)<\/td><\/tr><tr><td>Grossura<\/td><td>Tamanho m\u00e9dio \u2014 a estrutura adiciona 2 a 5 mm \u00e0 altura da mochila.<\/td><\/tr><tr><td>Rigidez<\/td><td>Alta \u2014 a estrutura impede a deforma\u00e7\u00e3o sob press\u00e3o.<\/td><\/tr><tr><td>Press\u00e3o m\u00e1xima de opera\u00e7\u00e3o<\/td><td>250\u2013400+ bar<\/td><\/tr><tr><td>Veda\u00e7\u00e3o<\/td><td>A estrutura cria uma veda\u00e7\u00e3o positiva contra a face da placa do disjuntor.<\/td><\/tr><tr><td>Configura\u00e7\u00f5es comuns<\/td><td>Circular com anel OD, quadrado com borda completa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"h-when-to-choose-framed\" class=\"wp-block-heading\">Quando escolher uma moldura<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As embalagens emolduradas s\u00e3o a op\u00e7\u00e3o preferida quando:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>As press\u00f5es de opera\u00e7\u00e3o s\u00e3o altas.<\/strong> (acima de 200 bar consistentemente)<\/li>\n\n\n\n<li>O processo envolve <strong>pol\u00edmeros de alta viscosidade<\/strong> (PET, PA, resinas de engenharia) que geram press\u00e3o de fus\u00e3o significativa<\/li>\n\n\n\n<li>Voc\u00ea precisa de um <strong>selo positivo<\/strong> para evitar que o material derretido passe pelas bordas da tela.<\/li>\n\n\n\n<li>O design do trocador de tela possui um <strong>recesso profundo<\/strong> ou requer um pacote de tela autolocaliz\u00e1vel<\/li>\n\n\n\n<li>Voc\u00ea est\u00e1 correndo <strong>Trocadores de tela sem suporte cont\u00ednuo<\/strong> (ex: trocadores de tela tipo placa deslizante ou tipo parafuso)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Aplica\u00e7\u00f5es t\u00edpicas:<\/strong> Fia\u00e7\u00e3o de fibra PET, composi\u00e7\u00e3o de resinas de engenharia, tubos de parede espessa, produ\u00e7\u00e3o de masterbatch<\/p>\n\n\n\n<h3 id=\"h-limitations-0\" class=\"wp-block-heading\">Limita\u00e7\u00f5es<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mais pesados que mochilas soldadas \u2014 maior custo de material<\/li>\n\n\n\n<li>A estrutura reduz ligeiramente a \u00e1rea de filtra\u00e7\u00e3o ativa em compara\u00e7\u00e3o com os designs soldados de face completa.<\/li>\n\n\n\n<li>Custo unit\u00e1rio mais elevado, especialmente em ligas ex\u00f3ticas.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-construction-type-3-pleated-screen-packs\" class=\"wp-block-heading\">Tipo de constru\u00e7\u00e3o 3: Pacotes de tela plissada<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/pfmscreen.com\/pt\/elementos-de-filtro-de-malha\/telas-de-extrusao\/pacotes-de-telas-extrusoras-plissadas\/\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Pleated-Extruder-Screen-Packs-3.jpg\" alt=\"Pacotes de telas plissadas para extrusora\" class=\"wp-image-2380\" srcset=\"https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Pleated-Extruder-Screen-Packs-3.jpg 600w, https:\/\/pfmscreen.com\/wp-content\/uploads\/2025\/12\/Pleated-Extruder-Screen-Packs-3-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure>\n\n\n\n<h3 id=\"h-how-they-re-made-1\" class=\"wp-block-heading\">Como s\u00e3o feitos<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os filtros de tela plissada dobram o meio filtrante \u2014 geralmente uma malha fina ou uma estrutura composta multicamadas \u2014 em um padr\u00e3o de pregas tipo acorde\u00e3o. O elemento plissado \u00e9 ent\u00e3o montado em uma estrutura ou alojamento de suporte. Essa \u00e9 uma abordagem fundamentalmente diferente em compara\u00e7\u00e3o com os filtros planos soldados ou emoldurados.<\/p>\n\n\n\n<h3 id=\"h-key-characteristics-1\" class=\"wp-block-heading\">Principais caracter\u00edsticas<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Propriedade<\/th><th>Detalhe<\/th><\/tr><\/thead><tbody><tr><td>\u00c1rea de filtra\u00e7\u00e3o<\/td><td>3 a 8 vezes maior que uma embalagem plana equivalente.<\/td><\/tr><tr><td>Press\u00e3o de opera\u00e7\u00e3o<\/td><td>Moderado \u2014 normalmente at\u00e9 150\u2013200 bar<\/td><\/tr><tr><td>Vida \u00fatil<\/td><td>Significativamente mais tempo de armazenamento devido \u00e0 maior capacidade de reten\u00e7\u00e3o de sujeira.<\/td><\/tr><tr><td>queda de press\u00e3o<\/td><td>Menor \u0394P inicial para classifica\u00e7\u00e3o de m\u00edcron equivalente<\/td><\/tr><tr><td>Fator de forma<\/td><td>Disco, cartucho ou elemento plissado personalizado<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"h-when-to-choose-pleated\" class=\"wp-block-heading\">Quando escolher pregas<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mochilas plissadas oferecem uma grande vantagem quando:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Os n\u00edveis de contamina\u00e7\u00e3o s\u00e3o altos.<\/strong> (materiais reciclados, material mo\u00eddo, resina p\u00f3s-consumo)<\/li>\n\n\n\n<li>Voc\u00ea quer <strong>prolongar os intervalos de servi\u00e7o<\/strong> entre mudan\u00e7as de tela para reduzir o tempo de inatividade<\/li>\n\n\n\n<li>Seu processo \u00e9 <strong>sens\u00edvel \u00e0 press\u00e3o<\/strong> e voc\u00ea precisa minimizar a queda de press\u00e3o.<\/li>\n\n\n\n<li>Voc\u00ea est\u00e1 utilizando filtra\u00e7\u00e3o fina (abaixo de 80 m\u00edcrons) e precisa de uma \u00e1rea maior para manter a vaz\u00e3o.<\/li>\n\n\n\n<li>O trocador de telas foi projetado para elementos plissados (alguns sistemas de correia cont\u00ednua ou retrolavagem).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Aplica\u00e7\u00f5es t\u00edpicas:<\/strong> Linhas de reciclagem de pl\u00e1stico, processamento de PET p\u00f3s-consumo, PP\/HDPE com alta contamina\u00e7\u00e3o, produ\u00e7\u00e3o de concentrado de cor<\/p>\n\n\n\n<h3 id=\"h-limitations-1\" class=\"wp-block-heading\">Limita\u00e7\u00f5es<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>N\u00e3o \u00e9 compat\u00edvel com todos os designs de trocadores de tela (requer geometria de alojamento espec\u00edfica).<\/li>\n\n\n\n<li>Custo unit\u00e1rio inicial mais elevado<\/li>\n\n\n\n<li>Os meios filtrantes plissados podem ser mais sens\u00edveis a picos de fluxo e choques t\u00e9rmicos.<\/li>\n\n\n\n<li>N\u00e3o \u00e9 adequado para press\u00f5es muito elevadas sem uma estrutura de suporte refor\u00e7ada.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-side-by-side-comparison\" class=\"wp-block-heading\">Compara\u00e7\u00e3o lado a lado<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Par\u00e2metro<\/th><th>Soldado<\/th><th>Emoldurado<\/th><th>Plissado<\/th><\/tr><\/thead><tbody><tr><td>\u00c1rea de superf\u00edcie de filtra\u00e7\u00e3o<\/td><td>1\u00d7 (linha de base)<\/td><td>~0,9\u00d7 (a moldura reduz a \u00e1rea)<\/td><td>3\u20138\u00d7<\/td><\/tr><tr><td>Toler\u00e2ncia m\u00e1xima de press\u00e3o<\/td><td>M\u00e9dio (at\u00e9 ~250 bar)<\/td><td>Alto (250\u2013400+ bar)<\/td><td>Inferior (at\u00e9 ~200 bar)<\/td><\/tr><tr><td>Queda de press\u00e3o (inicial)<\/td><td>M\u00e9dio<\/td><td>M\u00e9dio<\/td><td>Baixo<\/td><\/tr><tr><td>Vida \u00fatil<\/td><td>Padr\u00e3o<\/td><td>Padr\u00e3o<\/td><td>Estendido<\/td><\/tr><tr><td>Manuseio de contaminantes<\/td><td>Moderado<\/td><td>Moderado<\/td><td>Alto<\/td><\/tr><tr><td>Compatibilidade<\/td><td>A maioria dos trocadores de tela<\/td><td>A maioria dos trocadores de tela<\/td><td>Trocadores de tela selecionados<\/td><\/tr><tr><td>Custo por unidade<\/td><td>Baixo\u2013M\u00e9dio<\/td><td>M\u00e9dio-Alto<\/td><td>M\u00e9dio-Alto<\/td><\/tr><tr><td>Instala\u00e7\u00e3o<\/td><td>F\u00e1cil<\/td><td>F\u00e1cil\u2013M\u00e9dio<\/td><td>Requer alojamento adequado<\/td><\/tr><tr><td>Ideal para<\/td><td>Extrus\u00e3o padr\u00e3o<\/td><td>Alta press\u00e3o, alta viscosidade<\/td><td>Reciclagem, ra\u00e7\u00f5es contaminadas<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-how-to-decide-a-process-based-decision-framework\" class=\"wp-block-heading\">Como Decidir: Uma Estrutura de Decis\u00e3o Baseada em Processos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Utilize essa estrutura para restringir sua sele\u00e7\u00e3o:<\/p>\n\n\n\n<h3 id=\"h-step-1-check-your-operating-pressure\" class=\"wp-block-heading\">Passo 1: Verifique a press\u00e3o de opera\u00e7\u00e3o.<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Abaixo de 200 bar consistentemente<\/strong> \u2192 Tanto as soldadas quanto as plissadas s\u00e3o vi\u00e1veis.<\/li>\n\n\n\n<li><strong>Acima de 200 bar regularmente<\/strong> \u2192 A embalagem com moldura \u00e9 a op\u00e7\u00e3o mais segura<\/li>\n\n\n\n<li><strong>Picos de press\u00e3o acima de 300 bar<\/strong> \u2192 Estrutura com tela de suporte refor\u00e7ada essencial<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-2-assess-your-contamination-load\" class=\"wp-block-heading\">Etapa 2: Avalie sua carga de contamina\u00e7\u00e3o<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Resina virgem limpa<\/strong> \u2192 o pacote soldado \u00e9 suficiente<\/li>\n\n\n\n<li><strong>Mistura virgem + mo\u00eddo<\/strong> \u2192 soldado ou emoldurado, dependendo da press\u00e3o<\/li>\n\n\n\n<li><strong>Alto n\u00edvel de contamina\u00e7\u00e3o\/conte\u00fado reciclado &gt;30%<\/strong> \u2192 plissado para maior durabilidade<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-3-evaluate-your-screen-changer-type\" class=\"wp-block-heading\">Etapa 3: Avalie o tipo de trocador de tela que voc\u00ea utiliza.<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Placa deslizante ou tipo parafuso<\/strong> \u2192 soldado ou emoldurado<\/li>\n\n\n\n<li><strong>Correia cont\u00ednua \/ retrolavagem<\/strong> \u2192 Consulte o fabricante; elementos plissados podem estar dispon\u00edveis.<\/li>\n\n\n\n<li><strong>Altera\u00e7\u00e3o manual da tela<\/strong> \u2192 qualquer tipo; emoldurado ajuda na autolocaliza\u00e7\u00e3o<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-4-consider-your-filtration-fineness-target\" class=\"wp-block-heading\">Etapa 4: Considere sua meta de finura de filtra\u00e7\u00e3o<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Acima de 150 m\u00edcrons<\/strong> \u2192 A soldagem em camada \u00fanica costuma ser adequada<\/li>\n\n\n\n<li><strong>40\u2013150 micr\u00f4metros<\/strong> \u2192 multicamadas soldadas ou emolduradas (com malha de suporte)<\/li>\n\n\n\n<li><strong>Abaixo de 40 m\u00edcrons<\/strong> \u2192 plissado para fluxo sustent\u00e1vel; ou emoldurado com malha de trama holandesa<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-5-factor-in-changeover-cost\" class=\"wp-block-heading\">Etapa 5: Inclua o custo de transi\u00e7\u00e3o<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mudan\u00e7as frequentes s\u00e3o aceit\u00e1veis<\/strong> \u2192 A soldagem \u00e9 economicamente vi\u00e1vel<\/li>\n\n\n\n<li><strong>Tempo de inatividade \u00e9 caro.<\/strong> \u2192 As pregas aumentam os intervalos; as molduras reduzem o risco de vazamento durante as trocas de fraldas.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-layer-configuration-within-each-type\" class=\"wp-block-heading\">Configura\u00e7\u00e3o de camadas dentro de cada tipo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Independentemente do tipo de constru\u00e7\u00e3o, a maioria dos conjuntos de telas utiliza um <strong>estrutura multicamadas<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Camada<\/th><th>Contagem de malha<\/th><th>Papel<\/th><\/tr><\/thead><tbody><tr><td>Suporte grosseiro (a montante)<\/td><td>malha 10\u201330<\/td><td>Suporte estrutural, pr\u00e9-filtro<\/td><\/tr><tr><td>Filtra\u00e7\u00e3o prim\u00e1ria<\/td><td>60\u2013325 malha<\/td><td>Captura principal de contamina\u00e7\u00e3o<\/td><\/tr><tr><td>Filtragem fina (opcional)<\/td><td>200\u2013500 mesh<\/td><td>Remo\u00e7\u00e3o de gel, captura de part\u00edculas finas<\/td><\/tr><tr><td>Suporte a jusante<\/td><td>malha 10\u201320<\/td><td>Impede a ruptura da m\u00eddia<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Para estruturas emolduradas e soldadas, as configura\u00e7\u00f5es padr\u00e3o s\u00e3o geralmente de 3 ou 4 camadas. Elementos plissados frequentemente utilizam um material composto pr\u00e9-laminado em vez de camadas soltas separadas.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-material-considerations\" class=\"wp-block-heading\">Considera\u00e7\u00f5es sobre o material<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os tr\u00eas tipos est\u00e3o dispon\u00edveis em:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SS 304<\/strong> \u2014 notas padr\u00e3o, mais comuns<\/li>\n\n\n\n<li><strong>SS 316L<\/strong> \u2014 pol\u00edmeros contendo cloreto ou agressivos<\/li>\n\n\n\n<li><strong>SS 316Ti<\/strong> \u2014 estabilidade em temperaturas elevadas<\/li>\n\n\n\n<li><strong>Monel \/ Inconel<\/strong> \u2014 fluoropol\u00edmeros (PVDF, PTFE), fundidos altamente corrosivos<\/li>\n\n\n\n<li><strong>Bronze fosforoso<\/strong> \u2014 Processamento de PVC (resistente \u00e0 corros\u00e3o sob tens\u00e3o por cloretos)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A escolha do material deve ser feita de acordo com a qu\u00edmica do pol\u00edmero, e n\u00e3o apenas com a temperatura. Para obter orienta\u00e7\u00f5es, consulte nosso pr\u00f3ximo artigo: <em>Telas de extrus\u00e3o SS304 vs. SS316L: Qual grau de a\u00e7o inoxid\u00e1vel voc\u00ea deve escolher?<\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 id=\"h-summary\" class=\"wp-block-heading\">Resumo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e3o existe um tipo de constru\u00e7\u00e3o de tela de prote\u00e7\u00e3o universalmente &quot;melhor&quot;. A escolha certa depende da press\u00e3o de opera\u00e7\u00e3o, do tipo de pol\u00edmero, do n\u00edvel de contamina\u00e7\u00e3o e do projeto do trocador de telas.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Soldado<\/strong> \u2192 confi\u00e1vel, econ\u00f4mico, ampla compatibilidade<\/li>\n\n\n\n<li><strong>Emoldurado<\/strong> \u2192 Integridade sob alta press\u00e3o, veda\u00e7\u00e3o positiva, durabilidade a longo prazo<\/li>\n\n\n\n<li><strong>Plissado<\/strong> \u2192 \u00c1rea de filtra\u00e7\u00e3o m\u00e1xima, vida \u00fatil prolongada, ideal para resinas recicladas<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Em caso de d\u00favida, descreva sua aplica\u00e7\u00e3o ao fornecedor do seu sistema de telas de impress\u00e3o \u2014 press\u00e3o, vaz\u00e3o, pol\u00edmero e frequ\u00eancia de troca \u2014 e solicite uma recomenda\u00e7\u00e3o t\u00e9cnica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A PFM SCREEN fabrica os tr\u00eas tipos de constru\u00e7\u00e3o em configura\u00e7\u00f5es padr\u00e3o e personalizadas, com op\u00e7\u00f5es de materiais que variam de a\u00e7o inoxid\u00e1vel 304 a Inconel. <a href=\"https:\/\/pfmscreen.com\/pt\/contact\/\">Entre em contato com nossa equipe t\u00e9cnica.<\/a> Para recomenda\u00e7\u00f5es espec\u00edficas de cada aplica\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>Nem todos os conjuntos de telas para extrusoras s\u00e3o constru\u00eddos da mesma forma. Este guia detalha as principais diferen\u00e7as entre conjuntos de telas soldadas, emolduradas e plissadas \u2014 abordando constru\u00e7\u00e3o, desempenho, capacidade de suportar press\u00e3o e qual tipo \u00e9 mais adequado para o seu processo de extrus\u00e3o de pol\u00edmeros.<\/p>","protected":false},"author":1,"featured_media":3506,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-4369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Welded vs. Framed vs. Pleated Extruder Screen Packs | PFM SCREEN<\/title>\n<meta name=\"description\" content=\"Compare welded, framed, and pleated extruder screen packs: construction, pressure tolerance, 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