{"id":5308,"date":"2020-09-29T01:53:08","date_gmt":"2020-09-29T01:53:08","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5308"},"modified":"2020-09-29T01:53:58","modified_gmt":"2020-09-29T01:53:58","slug":"mold-coating","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/mold-coating\/","title":{"rendered":"Revestimento de molde"},"content":{"rendered":"

Para uma pe\u00e7a fundida espec\u00edfica, se o revestimento do molde for selecionado adequadamente, a opera\u00e7\u00e3o de aplica\u00e7\u00e3o ser\u00e1 est\u00e1vel e controlada. Em teoria, \u00e9 poss\u00edvel obter pe\u00e7as fundidas qualificadas. No entanto, no processo real de fundi\u00e7\u00e3o, a opera\u00e7\u00e3o de aplica\u00e7\u00e3o \u00e9 frequentemente considerada o elo mais vari\u00e1vel. Portanto, \u00e9 muito importante preparar cuidadosamente o molde antes do revestimento, preparar o revestimento e escolher as ferramentas de aplica\u00e7\u00e3o a serem utilizadas.<\/p>\n

O substrato sobre o qual o revestimento \u00e9 aplicado \u00e9 extremamente importante para o desempenho do revestimento. O molde novo deve ser cuidadosamente limpo antes da aplica\u00e7\u00e3o, a fim de remover toda a graxa lubrificante e manchas de ferrugem. O molde usado deve ter o revestimento original totalmente removido. O m\u00e9todo tradicional de limpeza do molde consiste em usar uma escova de a\u00e7o para remover a sujeira da superf\u00edcie. Esse m\u00e9todo costuma causar desgaste excessivo na superf\u00edcie do molde ou produzir pequenas rachaduras nela. Por isso, busca-se novos m\u00e9todos de limpeza n\u00e3o destrutivos para limpar superf\u00edcies met\u00e1licas.<\/p>\n

O molde limpo deve ser aquecido uniformemente a cerca de 300-350 \u00b0C. O m\u00e9todo de aquecimento geralmente utiliza queimadores a g\u00e1s para garantir que a chama seja distribu\u00edda uniformemente por todas as partes do molde.<\/p>\n

Ao aplicar o revestimento, a temperatura do molde deve, normalmente, ser reduzida primeiro para cerca de 180 \u00b0C, e o revestimento de base geralmente consiste em uma solu\u00e7\u00e3o aquosa contendo um surfactante ou um revestimento altamente dilu\u00eddo, o que pode melhorar a ader\u00eancia do revestimento \u00e0 superf\u00edcie do molde.<\/p>\n

Antes de aplicar o revestimento do molde, a tinta original deve ser agitada uniformemente e dilu\u00edda at\u00e9 atingir a concentra\u00e7\u00e3o e a viscosidade necess\u00e1rias. Se o tempo de aplica\u00e7\u00e3o for longo, durante o processo de aplica\u00e7\u00e3o, a viscosidade e a concentra\u00e7\u00e3o do revestimento, a espessura do revestimento e a temperatura do molde devem ser medidas e ajustadas regularmente.<\/p>\n

\"Revestimento<\/p>\n

Nossa empresa, a AdTech, fornece revestimentos para moldes, incluindo revestimentos de nitreto de boro, materiais refrat\u00e1rios para reparo de argamassa e revestimentos para moldes de lingotes de alum\u00ednio.<\/p>\n

Revestimento de nitreto de boro<\/a> (S\u00e9rie BN): Trata-se de um tipo de revestimento protetor l\u00edquido \u00e0 base de nitreto de boro ativo com boa efic\u00e1cia. Pode ser misturado com \u00e1gua e aplicado em revestimentos de s\u00edlica fundida, tubos verticais, materiais refrat\u00e1rios moldados, revestimentos de tijolos, flutuadores, ranhuras de fluxo, v\u00e1rias superf\u00edcies de conchas e ferramentas met\u00e1licas, sendo especialmente adequado para a superf\u00edcie de produtos cer\u00e2micos, como discos de deriva\u00e7\u00e3o, canais de vazamento, caixas de filtro e caixas de desgaseifica\u00e7\u00e3o para fundi\u00e7\u00e3o com topo quente, al\u00e9m de proporcionar um bom efeito protetor como revestimento antiaderente para alum\u00ednio.<\/p>\n

Argamassa refrat\u00e1ria<\/a> Material de reparo: um material de moldagem e preenchimento branco, muito adequado para a ind\u00fastria de fundi\u00e7\u00e3o com topo quente. Pode ser amplamente utilizado no preenchimento de canais de alum\u00ednio l\u00edquido e placas de deriva\u00e7\u00e3o, bem como material de preenchimento. Tamb\u00e9m pode ser amplamente utilizado em diversos materiais refrat\u00e1rios cer\u00e2micos em contato com o alum\u00ednio fundido, apresentando boa reten\u00e7\u00e3o de calor e efeito de veda\u00e7\u00e3o. Pode ser utilizado como material de reparo de veda\u00e7\u00e3o para revestimento de fornos ou placas refrat\u00e1rias. Tamb\u00e9m pode ser utilizado para preencher a camada protetora da concha de fundi\u00e7\u00e3o autom\u00e1tica.<\/p>\n

Caracter\u00edsticas do alum\u00ednio revestimento do molde de lingote<\/a>:<\/p>\n

    \n
  1. Proteja os moldes de metal e prolongue sua vida \u00fatil.<\/li>\n
  2. Facilitar a desmoldagem das pe\u00e7as fundidas e evitar a ader\u00eancia e o ac\u00famulo de \u00f3xido.<\/li>\n
  3. Controlar o fluxo de calor transferido da liga de fundi\u00e7\u00e3o para o molde met\u00e1lico.<\/li>\n
  4. Melhorar o acabamento superficial das pe\u00e7as fundidas.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    For a specific casting, if the mold coating is selected properly, the application operation is stable and controlled. In theory, qualified castings can be obtained.…<\/p>","protected":false},"author":1,"featured_media":5309,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5308","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMold Coating used for Metal Casting | Boron Nitride Coating<\/title>\n<meta name=\"description\" content=\"AdTech provides mold coating, including boron nitride coatings, refractory mortar repair materials, aluminum ingot mold coatings.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/pt\/mold-coating\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mold 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