{"id":8574,"date":"2021-04-28T06:53:16","date_gmt":"2021-04-28T06:53:16","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8574"},"modified":"2021-04-28T06:59:13","modified_gmt":"2021-04-28T06:59:13","slug":"feeding-tip-nozzle","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/ar\/feeding-tip-nozzle\/","title":{"rendered":"Feeding\u00a0Tip\u00a0Nozzle"},"content":{"rendered":"<p>The feeding tip nozzle is by pressing the buffer pad directly into the surface of the outside face of the feed tip nozzle as the feed tip nozzle is being molded. Typically the feeding tip nozzle is made from felt of refractory fibers (alumina and silica), the felt is made by dispersing said fibers in an aqueous solution containing a dispersion of colloidal silica such that the resultant slurry maintains 5% by weight of said fibers. A felt blanket is formed by immersing a felting screen into the slurry and connecting a vacuum suction to the underside, allowing the felt fibers to accumulate on the surface of the felting screen.<\/p>\n<p>The felt blanket is placed into a die cavity and the cavity is closed by a mating die member after the buffer pad is placed on top of the felt fibers in a position adjacent to the eventual downstream edge of the feed tip member. The assembly is pressed at a pressure insufficient to cause substantial fiber breakage to compress the felt blanket to the desired geometry of one moiety of the continuous feed tip nozzle and to press the buffer pad into the felt blanket. This process is conventional except for the addition of the buffer pad.<\/p>\n<p>An alternative technique for attaching the buffer pad to the outside face of the feed tip nozzle is by applying a silica-based glue to the side of the buffer pad to be attached to the feed tip nozzle and then pressing the buffer pad into the feed tip nozzle by the molding press technique described above.<\/p>\n<p>\u0627\u0644\u0640 <a href=\"http:\/\/www.alalloycasting.com\/ar\/feed-tip\/\">feed\u00a0tip<\/a>\u00a0member thickness is approximately 2.2 mm at the downstream edge of each feed\u00a0tip\u00a0member with a 4 to 5 mm gap between the pair of feed\u00a0tip\u00a0members from which the molten metal flows. Typically there is less than a 5.5 mm gap between\u00a0caster\u00a0rolls at the downstream edge of the\u00a0caster\u00a0rolls. To accommodate the attached buffer pad the downstream edge of the pair of feed\u00a0tip\u00a0nozzles is moved back upstream far enough to compensate for the increase in thickness the buffer pad adds to the feed\u00a0tip\u00a0nozzle when attached.<\/p>\n<p>The buffer pad is formed into a generally rectangular shape, the length being defined by the length of the assembled feeding tip nozzle members whose length, in turn, is dependent upon the predetermined length of the caster rolls. The width of the buffer pad is approximately determined by the area on the outside face of the feed tip nozzle member that would otherwise come into contact with the rotating caster roll.<\/p>","protected":false},"excerpt":{"rendered":"<p>The feeding tip nozzle is by pressing the buffer pad directly into the surface of the outside face of the feed tip nozzle as the&hellip;<\/p>","protected":false},"author":1,"featured_media":8600,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8574","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Feeding\u00a0Tip\u00a0Nozzle with buffer pad -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The feeding tip nozzle is by 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