{"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\/fr\/feeding-tip-nozzle\/","title":{"rendered":"Buse d'alimentation"},"content":{"rendered":"<p>La buse d'alimentation est form\u00e9e en pressant le tampon amortisseur directement contre la surface de la face ext\u00e9rieure de la buse d'alimentation pendant le moulage de celle-ci. G\u00e9n\u00e9ralement, la buse d\u2019alimentation est fabriqu\u00e9e \u00e0 partir d\u2019un feutre compos\u00e9 de fibres r\u00e9fractaires (alumine et silice) ; ce feutre est obtenu en dispersant lesdites fibres dans une solution aqueuse contenant une dispersion de silice collo\u00efdale, de telle sorte que la suspension ainsi obtenue contienne 5% en poids desdites fibres. Une nappe de feutre est form\u00e9e en plongeant un tamis de feutrage dans la suspension et en appliquant une aspiration sous vide sur sa face inf\u00e9rieure, ce qui permet aux fibres de feutre de s\u2019accumuler \u00e0 la surface du tamis de feutrage.<\/p>\n<p>La nappe de feutre est plac\u00e9e dans la cavit\u00e9 d'une matrice, et celle-ci est ferm\u00e9e par un \u00e9l\u00e9ment de matrice correspondant apr\u00e8s que le tampon amortisseur a \u00e9t\u00e9 positionn\u00e9 au-dessus des fibres de feutre, \u00e0 proximit\u00e9 du futur bord aval de l'\u00e9l\u00e9ment d'embout d'alimentation. L\u2019ensemble est soumis \u00e0 une pression insuffisante pour provoquer une rupture importante des fibres, afin de comprimer la nappe de feutre pour lui donner la g\u00e9om\u00e9trie souhait\u00e9e d\u2019une des deux parties de la buse d\u2019alimentation continue et d\u2019enfoncer le tampon amortisseur dans la nappe de feutre. Ce proc\u00e9d\u00e9 est classique, \u00e0 l\u2019exception de l\u2019ajout du tampon amortisseur.<\/p>\n<p>Une autre technique permettant de fixer le tampon amortisseur sur la face ext\u00e9rieure de la buse d'alimentation consiste \u00e0 appliquer une colle \u00e0 base de silice sur le c\u00f4t\u00e9 du tampon amortisseur destin\u00e9 \u00e0 \u00eatre fix\u00e9 \u00e0 la buse d'alimentation, puis \u00e0 enfoncer le tampon amortisseur dans la buse d'alimentation \u00e0 l'aide de la technique de moulage sous pression d\u00e9crite ci-dessus.<\/p>\n<p>Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/feed-tip\/\">conseil d'alimentation<\/a>\u00a0L'\u00e9paisseur des \u00e9l\u00e9ments est d'environ 2,2 mm au niveau du bord aval de chaque \u00e9l\u00e9ment d'extr\u00e9mit\u00e9 d'alimentation, avec un \u00e9cart de 4 \u00e0 5 mm entre la paire d'\u00e9l\u00e9ments d'extr\u00e9mit\u00e9 d'alimentation par lesquels s'\u00e9coule le m\u00e9tal en fusion. En r\u00e8gle g\u00e9n\u00e9rale, l\u2019\u00e9cart entre les rouleaux de coul\u00e9e est inf\u00e9rieur \u00e0 5,5 mm au niveau de leur bord aval. Afin de s\u2019adapter au tampon de protection fix\u00e9, le bord aval de la paire de buses d\u2019alimentation est recul\u00e9 suffisamment vers l\u2019amont pour compenser l\u2019augmentation d\u2019\u00e9paisseur que le tampon de protection ajoute \u00e0 la buse d\u2019alimentation lorsqu\u2019il est fix\u00e9.<\/p>\n<p>Le patin d'amortissement pr\u00e9sente une forme globalement rectangulaire, dont la longueur est d\u00e9finie par la longueur des \u00e9l\u00e9ments d'embout d'alimentation assembl\u00e9s, laquelle d\u00e9pend elle-m\u00eame de la longueur pr\u00e9d\u00e9termin\u00e9e des rouleaux de moulage. La largeur du tampon est d\u00e9termin\u00e9e approximativement par la surface de la face ext\u00e9rieure de l'\u00e9l\u00e9ment d'embout d'alimentation qui, sans cela, entrerait en contact avec le rouleau de coul\u00e9e en rotation.<\/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":"closed","ping_status":"closed","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 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