{"id":8878,"date":"2014-09-18T15:11:19","date_gmt":"2014-09-18T20:11:19","guid":{"rendered":"https:\/\/www.insta-pro.com\/2014\/09\/18\/dispositifs-dalimentation-pour-extrudeuses\/"},"modified":"2017-03-31T13:44:19","modified_gmt":"2017-03-31T18:44:19","slug":"dispositifs-dalimentation-pour-extrudeuses","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/ingenierie-maintenance\/dispositifs-dalimentation-pour-extrudeuses\/","title":{"rendered":"Dispositifs d\u2019alimentation pour extrudeuses"},"content":{"rendered":"<p>De la m\u00eame mani\u00e8re que <a href=\"http:\/\/en.wikipedia.org\/wiki\/Extrusion\">l\u2019extrudeuse<\/a> est capable de fabriquer une grande vari\u00e9t\u00e9 de produits, il existe diff\u00e9rentes fa\u00e7ons d\u2019alimenter l\u2019extrudeuse. Je vais profiter de cet article pour parler des dispositifs d\u2019alimentation par le haut, des dispositifs d\u2019alimentation lat\u00e9raux, des tr\u00e9mies d\u2019\u00e9coulement et des types de produit auxquels ces syst\u00e8mes sont destin\u00e9s.<\/p>\n<p><strong>Dispositif d\u2019alimentation par le dessus<\/strong>&#8211; Ce dispositif alimente par gravit\u00e9 l\u2019extrudeuse par le dessus de sa chambre d\u2019alimentation et est utilis\u00e9 pour les produits pond\u00e9reux grossi\u00e8rement broy\u00e9s comme le soja, le ma\u00efs\/soja, et d\u2019autres m\u00e9langes de c\u00e9r\u00e9ales. Sur les anciens mod\u00e8les d\u2019extrudeuses, les dispositifs d\u2019alimentation \u00e9taient mont\u00e9s sur un dispositif \u00e0 bras pivotant qui \u00e9tait fix\u00e9 au ch\u00e2ssis du logement d\u2019arbre et palier. La version moderne se visse sur la m\u00eame structure, directement au-dessus de la chambre d\u2019alimentation. Ce type de syst\u00e8me d\u2019alimentation repr\u00e9sente notre configuration la plus basique et se retrouve dans une grande partie des \u00e9quipements qui sortent de chez nous.<\/p>\n<p>Syst\u00e8mes d\u2019alimentation forc\u00e9e ou d\u2019alimentation lat\u00e9rale &#8211; Certains produits que nous extrudons pr\u00e9sentent une difficult\u00e9 pour maintenir l\u2019alimentation du produit vers l\u2019extrudeuse et n\u00e9cessitent une alimentation directe dans la chambre d\u2019alimentation. Ceci est g\u00e9n\u00e9ralement d\u00fb aux caract\u00e9ristiques de produits tels que les ingr\u00e9dients \u00e0 faible densit\u00e9 apparente ou \u00e0 forte humidit\u00e9. Les ingr\u00e9dients en vrac sont difficiles \u00e0 faire entrer suffisamment vite pour garder l\u2019extrudeuse pleine, et posent constamment un probl\u00e8me de pontage ou de formation d\u2019une zone creuse autour de la vis d\u2019alimentation. Dans le secteur, on appelle aussi ce ph\u00e9nom\u00e8ne le \u00ab\u00a0rat-holing\u00a0\u00bb\u00a0; il entra\u00eene une interruption du flux du produit vers l\u2019extrudeuse.\u00a0 Les produits connus pour occasionner ces ph\u00e9nom\u00e8nes sont le <a href=\"http:\/\/en.wikipedia.org\/wiki\/Cottonseed\">coton<\/a>, le <a href=\"http:\/\/en.wikipedia.org\/wiki\/Bran#Rice_bran\">son de riz<\/a> et les sous-produits humides.<\/p>\n<p>Afin de permettre une alimentation suffisamment rapide de ce type de produits, et ainsi faire en sorte que l\u2019extrudeuse reste remplie et fonctionne de mani\u00e8re homog\u00e8ne, r\u00e9guli\u00e8re et efficace, on utilise une chambre d\u2019alimentation sp\u00e9ciale disposant d\u2019un adaptateur int\u00e9gr\u00e9 qui autorise un raccordement direct du dispositif d\u2019alimentation. \u00a0\u00a0Dans certains cas, on peut faire appel \u00e0 une vis d\u2019alimentation de taille sup\u00e9rieure, avec davantage de puissance, un rapport de transmission diff\u00e9rent et un agitateur, pour faire en sorte que le produit soit tout le temps en mouvement et ainsi \u00e9viter les probl\u00e8mes de pontage. Ce type de dispositif d\u2019alimentation est mont\u00e9 soit sur un bras pivotant, soit sur un b\u00e2ti dot\u00e9 de roues pour qu\u2019on puisse le d\u00e9placer, dans le but de faciliter son lavage complet.<\/p>\n<p>Dispositifs d\u2019\u00e9coulement en masse &#8211; Le syst\u00e8me d\u2019alimentation permettant un \u00e9coulement en masse est utilis\u00e9 en association avec le pr\u00e9conditionneur pour les produits qui n\u00e9cessitent un broyage fin ou une pulv\u00e9risation. Parmi ces produits on trouve les produits mis en forme tels que les aliments pour poissons et pour animaux de compagnie, ainsi que les prot\u00e9ines textur\u00e9es.\u00a0 La plupart des aliments pour poissons sont fabriqu\u00e9s en passant \u00e0 travers des matrices de tr\u00e8s petite taille, ce qui r\u00e9clame un broyage fin des ingr\u00e9dients \u00e0 extruder\u00a0; ces derniers ont par cons\u00e9quent les caract\u00e9ristiques d\u2019une farine. Le d\u00e9bit en entr\u00e9e de ces ingr\u00e9dients sous forme de farine peut poser des probl\u00e8mes\u00a0: des ph\u00e9nom\u00e8nes de pontage, comme avec les produits en vrac, sont possibles.<\/p>\n<p>Une alimentation homog\u00e8ne est essentielle lorsqu\u2019il s\u2019agit de fabriquer des produits mis en forme. R\u00e9aliser la m\u00eame forme d\u2019heure en heure n\u00e9cessite de la constance \u00e0 tous les niveaux, y compris concernant l\u2019humidit\u00e9, la temp\u00e9rature, la taille des particules et la vitesse d\u2019alimentation. La tr\u00e9mie d\u2019\u00e9coulement peut contenir jusqu\u2019\u00e0 500\u00a0kg de produit \u00e0 extruder. Elle poss\u00e8de des parois lat\u00e9rales \u00e0 forte pente, et suivant le mod\u00e8le, une ou deux vis au fond pour optimiser l\u2019alimentation en produit vers le tunnel de conditionnement.<\/p>\n<p>La diff\u00e9rence entre les diff\u00e9rents dispositifs d\u2019alimentation est une chose \u00e0 prendre en compte avant d\u2019acheter une nouvelle extrudeuse, ou d\u2019agrandir la gamme de vos produits.\u00a0 Pensez-y\u00a0: les \u00e9quipes nutrition, commerciale et apr\u00e8s-vente <a href=\"https:\/\/www.insta-pro.com\/\">Insta-Pro<\/a>\u00a0sont \u00e0 votre disposition pour parler de vos objectifs et vous aider \u00e0 prendre les d\u00e9cisions optimales pour votre exploitation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>De la m\u00eame mani\u00e8re que l\u2019extrudeuse est capable de fabriquer une grande vari\u00e9t\u00e9 de produits, il existe diff\u00e9rentes fa\u00e7ons d\u2019alimenter l\u2019extrudeuse. Je vais profiter de cet article pour parler des dispositifs d\u2019alimentation par le haut, des dispositifs d\u2019alimentation lat\u00e9raux, des tr\u00e9mies d\u2019\u00e9coulement et des types de produit auxquels ces syst\u00e8mes sont destin\u00e9s. Dispositif d\u2019alimentation par [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":11075,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7177],"tags":[8964,8956,1647,550,591,630,573,626],"class_list":["post-8878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ingenierie-maintenance","tag-hi-gel","tag-installation-de-transformation","tag-mais-extrude","tag-produits-extrudes-fr","tag-strategie-commerciale-fr-3","tag-production-de-melange-mais-soja-fr","tag-transformation-de-sous-produits","tag-transformation-du-mais"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Dispositifs d\u2019alimentation pour extrudeuses<\/title>\n<meta name=\"description\" content=\"De la m\u00eame mani\u00e8re que l\u2019extrudeuse est capable de fabriquer une grande vari\u00e9t\u00e9 de produits, il existe diff\u00e9rentes fa\u00e7ons d\u2019alimenter l\u2019extrudeuse\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/instapro.spinuhost.com\/fr\/blog\/ingenierie-maintenance\/dispositifs-dalimentation-pour-extrudeuses\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dispositifs d\u2019alimentation pour extrudeuses\" \/>\n<meta property=\"og:description\" content=\"De la m\u00eame mani\u00e8re que l\u2019extrudeuse est capable de fabriquer une grande vari\u00e9t\u00e9 de produits, il existe diff\u00e9rentes fa\u00e7ons d\u2019alimenter l\u2019extrudeuse\" \/>\n<meta property=\"og:url\" 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