{"id":5915,"date":"2020-09-22T20:09:12","date_gmt":"2020-09-22T20:09:12","guid":{"rendered":"https:\/\/psi-polymersystems.com\/?page_id=5915"},"modified":"2020-09-22T20:15:35","modified_gmt":"2020-09-22T20:15:35","slug":"psi-polymer-systems-inc-leak-free-screen-changer-for-extrusion-coating-applications-conover-nc-august-29-2016","status":"publish","type":"page","link":"https:\/\/www.psi-polymersystems.com\/pt\/about-us\/press-releases\/psi-polymer-systems-inc-leak-free-screen-changer-for-extrusion-coating-applications-conover-nc-august-29-2016\/","title":{"rendered":"PSI-Polymer Systems Inc. Trocador de tela sem vazamento para aplica\u00e7\u00f5es de revestimento por extrus\u00e3o Conover, NC (29 de agosto de 2016)"},"content":{"rendered":"
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PSI-Polymer Systems, Inc. Trocador de tela sem vazamento para aplica\u00e7\u00f5es de revestimento por extrus\u00e3o Conover, NC (29 de agosto de 2016) <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A PSI-Polymer Systems desenvolveu e testou em campo com sucesso uma veda\u00e7\u00e3o de troca de tela verdadeiramente livre de vazamentos para aplica\u00e7\u00f5es de revestimento por extrus\u00e3o de alta temperatura e baixa viscosidade.<\/p>

Por d\u00e9cadas, as aplica\u00e7\u00f5es de revestimento por extrus\u00e3o de alta temperatura apresentaram um desafio dif\u00edcil para a tecnologia de veda\u00e7\u00e3o do trocador de tela de placa deslizante para opera\u00e7\u00e3o sem vazamentos. As veda\u00e7\u00f5es mec\u00e2nicas do trocador de tela utilizam folgas entre a veda\u00e7\u00e3o e o corpo (t\u00edp. 0,001\u201d a 0,0015\u201d radial) para acomodar a remo\u00e7\u00e3o e substitui\u00e7\u00e3o. Para aplica\u00e7\u00f5es de processo t\u00edpicas, as viscosidades do pol\u00edmero s\u00e3o muito r\u00edgidas para passar por essas folgas e as m\u00e1quinas funcionam sem problemas. As aplica\u00e7\u00f5es de revestimento por extrus\u00e3o, no entanto, geralmente processam pol\u00edmeros a temperaturas de 630 graus. F (332 graus C) e superior. Essas temperaturas elevadas resultam em viscosidades extremamente baixas que podem fluir atrav\u00e9s de folgas radiais t\u00e3o apertadas quanto 0,0005\u201d. Para agravar este problema est\u00e1 a coloca\u00e7\u00e3o t\u00edpica do trocador de tela acima da matriz. Qualquer vazamento de pol\u00edmero desta posi\u00e7\u00e3o comprometer\u00e1 a teia ou, pior ainda, pingar\u00e1 na matriz quente.<\/p>

Devido a esse problema, a maioria das opera\u00e7\u00f5es de revestimento por extrus\u00e3o \u00e9 padronizada para um filtro de bloco de cartucho que requer troca manual, \u00e9 de dif\u00edcil acesso e exige muito trabalho.<\/p>

A PSI resolveu com sucesso os problemas de vazamento do trocador de tela de posicionamento de slides para revestimento de extrus\u00e3o por meio de uma atualiza\u00e7\u00e3o propriet\u00e1ria de seu selo ativado por press\u00e3o patenteado e vital\u00edcio. A mudan\u00e7a introduz um componente de veda\u00e7\u00e3o anular adapt\u00e1vel e resistente ao calor (1200 graus F \/ 650 graus C) que impede que pol\u00edmeros com viscosidades extremamente baixas migrem ao redor do di\u00e2metro externo da veda\u00e7\u00e3o.\u00a0<\/p>

O primeiro sistema de cinco camadas foi vendido em 2015 para uma grande empresa internacional de engenharia e iniciou suas opera\u00e7\u00f5es na \u00c1sia. A temperatura operacional m\u00e1xima t\u00edpica para o LDPE \u00e9 de 630 graus. F (332 graus C). Desde a instala\u00e7\u00e3o, os trocadores de tela funcionaram com vazamento zero. \u201cEst\u00e1vamos t\u00e3o certos do projeto do selo\u201d, relata Don Macnamara, gerente geral da PSI, \u201cque demonstramos um desempenho sem vazamentos para um grande OEM enchendo o trocador de tela com \u00f3leo hidr\u00e1ulico no lugar de pol\u00edmero. Nem uma vez, durante os tr\u00eas dias de teste, os selos vazaram ou vazaram. Estou envolvido com trocadores de tela desde 1983. Este \u00e9 o primeiro trocador de tela de placa deslizante que experimentei que pode funcionar realmente sem vazamentos sob essas condi\u00e7\u00f5es extremas.\u201d<\/p>

At\u00e9 o momento, a PSI forneceu cerca de duas d\u00fazias de trocadores de tela para revestimento por extrus\u00e3o de alta temperatura, todos funcionando sem vazamento de veda\u00e7\u00e3o. Os trocadores de tela est\u00e3o dispon\u00edveis com metalurgia padr\u00e3o ou em a\u00e7o inoxid\u00e1vel para o processamento de pol\u00edmeros de revestimento por extrus\u00e3o com propriedades corrosivas.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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PSI-Polymer Systems, Inc. Trocador de tela sem vazamento para aplica\u00e7\u00f5es de revestimento por extrus\u00e3o Conover, NC (29 de agosto de 2016) A PSI-Polymer Systems desenvolveu e testou em campo com sucesso um selo trocador de tela verdadeiramente livre de vazamento para extrus\u00e3o de alta temperatura e baixa viscosidade aplica\u00e7\u00f5es de revestimento. Por d\u00e9cadas, as aplica\u00e7\u00f5es de revestimento por extrus\u00e3o de alta temperatura apresentaram um desafio dif\u00edcil para deslizar a veda\u00e7\u00e3o do trocador de tela [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"parent":5833,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-5915","page","type-page","status-publish","hentry"],"yoast_head":"\nPSI-Polymer Systems Inc. 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