{"id":7052,"date":"2020-12-17T03:16:11","date_gmt":"2020-12-17T03:16:11","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7052"},"modified":"2020-12-17T03:16:11","modified_gmt":"2020-12-17T03:16:11","slug":"alumina-ceramic-gasket","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/alumina-ceramic-gasket\/","title":{"rendered":"Junta de cer\u00e2mica de alumina"},"content":{"rendered":"

Em compara\u00e7\u00e3o com a superf\u00edcie de fibra cer\u00e2mica do bico de alimenta\u00e7\u00e3o, o tecido de fibra de vidro de trama apertada na superf\u00edcie da junta cer\u00e2mica de alumina \u00e9 mais liso e menos agressivo ou abrasivo. O tecido da almofada produz muito menos arranh\u00f5es de rolagem do que o material do bocal de alimenta\u00e7\u00e3o<\/a>. A orienta\u00e7\u00e3o das fibras do cabe\u00e7ote de alimenta\u00e7\u00e3o \u00e9 aleat\u00f3ria, e a extremidade saliente tende a desgastar facilmente a superf\u00edcie do rolo. Em compara\u00e7\u00e3o com a fibra cer\u00e2mica de alumina, normalmente utilizada na fabrica\u00e7\u00e3o do cabe\u00e7ote de alimenta\u00e7\u00e3o, a s\u00edlica da fibra de vidro \u00e9 mais lisa e menos abrasiva. As fibras tamb\u00e9m tendem a ficar mais pr\u00f3ximas da tangente do rolo, minimizando assim o contato da extremidade da fibra abrasiva com a superf\u00edcie do rolo.<\/p>\n

A camada de material de fibra cer\u00e2mica inclui um material semelhante a papel que cont\u00e9m um componente mineral resistente a altas temperaturas, o qual se expande quando aquecido.<\/p>\n

Quando fixada ao longo da borda do bocal de alimenta\u00e7\u00e3o, a junta de cer\u00e2mica de alumina feita desse material \u00e9 aproximadamente plana (embora em degraus). Ao ser aquecida pelo alum\u00ednio fundido na primeira utiliza\u00e7\u00e3o do cabe\u00e7ote de alimenta\u00e7\u00e3o, o material da junta se expande e a superf\u00edcie externa de cada almofada se encaixa na superf\u00edcie do rolo adjacente. A superf\u00edcie da almofada se adapta \u00e0 curvatura do rolo e forma uma \u201cveda\u00e7\u00e3o\u201d herm\u00e9tica com o rolo. A parte a jusante da almofada, composta por duas camadas de tecido de fibra de vidro, permite que a almofada se estreite de acordo com o formato da m\u00e1quina de fundi\u00e7\u00e3o e a borda a jusante do conjunto do bocal de alimenta\u00e7\u00e3o.<\/p>\n

\"Bocal<\/p>\n

A junta de cer\u00e2mica de alumina n\u00e3o apenas proporciona uma superf\u00edcie mais lisa e menos corrosiva no rolo, minimizando assim os arranh\u00f5es, mas tamb\u00e9m ajuda a manter uma atmosfera inerte pr\u00f3xima ao metal fundido, reduzindo a presen\u00e7a de oxig\u00eanio, o que encurta a vida \u00fatil da junta. O material da junta tamb\u00e9m reduz a deflex\u00e3o geral do bico de alimenta\u00e7\u00e3o, diminuindo ainda mais a possibilidade de o bico de alimenta\u00e7\u00e3o arranhar o par de rod\u00edzios.<\/p>","protected":false},"excerpt":{"rendered":"

Compared with the ceramic fiber surface of the feed nozzle, the tightly woven glass fiber fabric on the surface of alumina ceramic gasket is smoother…<\/p>","protected":false},"author":1,"featured_media":7053,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[7712,7711,1541,7716,7713,7714,7715,7710],"class_list":["post-7052","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-alumina-ceramic-gasket","tag-alumina-ceramic-liner","tag-alumina-ceramic-plate","tag-alumina-ceramic-sheet","tag-alumina-ceramic-spacer","tag-alumina-ceramic-strip","tag-alumina-plate","tag-supporting-nozzle-plane-board"],"yoast_head":"\nAlumina Ceramic Gasket for Feed Nozzle -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The alumina ceramic gasket provides a smoother surface on the roller, thereby minimizing scratches, and improves the feed 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