{"id":1817,"date":"2020-05-12T09:43:48","date_gmt":"2020-05-12T09:43:48","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=1817"},"modified":"2020-08-31T07:07:32","modified_gmt":"2020-08-31T07:07:32","slug":"aluminium-sand-casting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/aluminium-sand-casting\/","title":{"rendered":"Fundici\u00f3n de aluminio en arena"},"content":{"rendered":"<p>La fundici\u00f3n de aluminio en arena es un m\u00e9todo de fundici\u00f3n en el que se utilizan arena de fundici\u00f3n y arena para n\u00facleos como materiales de moldeo, y el metal l\u00edquido se vierte por gravedad para producir la pieza fundida. Mediante la fundici\u00f3n en arena se pueden obtener piezas fundidas de aluminio, hierro y la mayor\u00eda de las aleaciones no ferrosas.<\/p>\n<p>Dado que los materiales de moldeo utilizados en la fundici\u00f3n en arena son baratos y f\u00e1ciles de conseguir, el molde de fundici\u00f3n es sencillo de fabricar y se adapta tanto a la producci\u00f3n de piezas individuales como a la producci\u00f3n por lotes y a la producci\u00f3n en serie de piezas fundidas. Durante mucho tiempo, ha sido el proceso b\u00e1sico en la producci\u00f3n de piezas de fundici\u00f3n. El molde utilizado en la fundici\u00f3n en arena se compone, por lo general, del molde exterior de arena y del n\u00facleo.<\/p>\n<p>Con el fin de mejorar la calidad de la superficie de las piezas fundidas, a menudo se aplica una capa de pintura sobre la superficie del molde de arena y del n\u00facleo. Los componentes principales del recubrimiento son materiales en polvo y aglutinantes con alta refractariedad y buena estabilidad qu\u00edmica a altas temperaturas. Adem\u00e1s, se a\u00f1aden un veh\u00edculo (agua u otros disolventes) y diversos aditivos para facilitar su aplicaci\u00f3n. Las materias primas b\u00e1sicas para la fabricaci\u00f3n de moldes de arena son la arena de fundici\u00f3n y el aglutinante para arena. La arena de fundici\u00f3n m\u00e1s utilizada es la arena sil\u00edcea. Cuando el comportamiento a altas temperaturas de la arena sil\u00edcea no cumple los requisitos de uso, se recurre a arenas especiales como la arena de circ\u00f3n, la arena de cromita, la arena de corind\u00f3n, etc.<\/p>\n<p>Para que el molde y el n\u00facleo de arena fabricados tengan una resistencia determinada, no se deformen ni se da\u00f1en durante la manipulaci\u00f3n, el cierre del molde y el vertido del metal l\u00edquido. Por lo general, se debe a\u00f1adir un aglutinante para arena de moldeo a la fundici\u00f3n con el fin de unir las part\u00edculas sueltas de arena y convertirlas en arena de moldeo. El aglutinante m\u00e1s utilizado para la arena de moldeo es la arcilla, aunque tambi\u00e9n pueden emplearse diversos aceites secantes o semisecantes, silicatos o fosfatos solubles en agua y diversas resinas sint\u00e9ticas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4350\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Sand-Casting.jpg\" alt=\"Fundici\u00f3n de aluminio en arena\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Sand-Casting.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Sand-Casting-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<h2>Tipo de fundici\u00f3n de aluminio en arena<\/h2>\n<p>En funci\u00f3n del aglutinante utilizado en la arena y del m\u00e9todo de consecuci\u00f3n de la resistencia, el tipo de arena exterior empleada en la fundici\u00f3n en arena se divide en tres tipos: arena de arcilla h\u00fameda, arena de arcilla seca y arena endurecida qu\u00edmicamente.<\/p>\n<p><strong>Molde de arcilla y arena h\u00fameda<\/strong><\/p>\n<p>Los moldes de arena h\u00fameda con arcilla utilizan arcilla y una cantidad adecuada de agua como ligantes principales para la arena de moldeo. Una vez fabricados los moldes de arena, estos se ensamblan directamente y se vierte la mezcla en estado h\u00famedo. La fundici\u00f3n en h\u00famedo cuenta con una larga tradici\u00f3n y su uso est\u00e1 muy extendido. La resistencia de la arena h\u00fameda depende de la pasta de arcilla y agua mezcladas en una proporci\u00f3n determinada. Una vez mezclada la arena de moldeo, esta adquiere una cierta resistencia. Una vez que la arena se ha convertido en un molde de arena, puede cumplir los requisitos de moldeo y colada. Por lo tanto, la cantidad de arcilla y agua en la arena de moldeo son factores de proceso muy importantes.<\/p>\n<p><strong>Molde de arena seca<\/strong><\/p>\n<p>Los moldes de arena seca utilizados para fabricar este tipo de moldes tienen un contenido de humedad ligeramente superior al de la arena para moldes h\u00famedos. Una vez fabricado el molde de arena, se debe recubrir la superficie de la cavidad con pintura refractaria y, a continuaci\u00f3n, introducirlo en un horno para que se seque. Una vez enfriado, se puede cerrar el molde y proceder a la colada. El secado del molde de arena arcillosa lleva mucho tiempo y consume una gran cantidad de combustible; adem\u00e1s, el molde de arena se deforma f\u00e1cilmente durante el proceso de secado, lo que afecta a la precisi\u00f3n de la fundici\u00f3n. El molde de arena seca con arcilla se utiliza generalmente para fabricar piezas de acero fundido y piezas de hierro fundido de mayor tama\u00f1o. Desde que se ha generalizado el uso de la arena endurecida qu\u00edmicamente, los moldes de arena seca han ido desapareciendo progresivamente.<\/p>\n<p><strong>Molde de arena endurecido qu\u00edmicamente<\/strong><\/p>\n<p>La arena endurecida qu\u00edmicamente que se utiliza en este molde de arena se denomina \u00abarena endurecida qu\u00edmicamente\u00bb. El aglutinante suele ser una sustancia capaz de sufrir una polimerizaci\u00f3n molecular y adoptar una estructura tridimensional bajo la acci\u00f3n de un endurecedor. Se suelen utilizar diversas resinas sint\u00e9ticas y vidrio soluble. Existen b\u00e1sicamente tres m\u00e9todos de endurecimiento qu\u00edmico: el autoendurecimiento, el endurecimiento por aerosol y el endurecimiento por calentamiento.<\/p>\n<p>AdTech ofrece <a href=\"https:\/\/www.alalloycasting.com\/es\/sealing-material\/\">materiales de sellado,<\/a> <a href=\"https:\/\/www.alalloycasting.com\/es\/patching-material\/\">materiales de reparaci\u00f3n<\/a> En cuanto a la fundici\u00f3n de aluminio, si est\u00e1s interesado en nuestros productos, no dudes en <a href=\"https:\/\/www.alalloycasting.com\/es\/contact-us\/\">ponte en contacto con nosotros<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminium Sand Casting is a casting method in which casting sand and core sand are used as molding materials, and liquid metal is filled under&hellip;<\/p>","protected":false},"author":1,"featured_media":1852,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[139],"class_list":["post-1817","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminium-sand-casting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminium Sand Casting | Aluminum Casting Molds<\/title>\n<meta name=\"description\" content=\"Aluminium Sand Casting is a casting method in which casting sand and core sand are used as molding materials, and liquid metal is filled under gravity.\" \/>\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\/es\/aluminium-sand-casting\/\" \/>\n<meta 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