{"id":7655,"date":"2021-01-21T01:20:41","date_gmt":"2021-01-21T01:20:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7655"},"modified":"2026-04-20T06:41:01","modified_gmt":"2026-04-20T06:41:01","slug":"ceramic-foam-filters-foundry","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filters-foundry\/","title":{"rendered":"Filtres en mousse c\u00e9ramique pour fonderies : guide pratique pour obtenir des m\u00e9taux plus purs et r\u00e9duire le nombre de rebuts"},"content":{"rendered":"<p>Tout responsable de fonderie conna\u00eet ce moment : vous ouvrez le moule, et l\u00e0, sur la face usin\u00e9e d\u2019une pi\u00e8ce moul\u00e9e co\u00fbteuse, appara\u00eet une tache sombre \u2014 une inclusion qui vient de vous faire perdre une pi\u00e8ce. Dans les secteurs de l\u2019automobile ou de l\u2019a\u00e9rospatiale, o\u00f9 les exigences sont tr\u00e8s \u00e9lev\u00e9es, ce simple d\u00e9faut peut entra\u00eener la mise au rebut d\u2019un composant valant des centaines, voire des milliers de dollars. C\u2019est pr\u00e9cis\u00e9ment pour cette raison que\u00a0<strong>filtres en mousse c\u00e9ramique pour fonderie<\/strong>\u00a0Ces applications sont pass\u00e9es du statut de \u201c plus \u201d \u00e0 celui d'exigence incontournable dans les op\u00e9rations de moulage modernes.<\/p>\n<p>Chez AdTech, nous fabriquons et fournissons des produits de filtration pour la fonderie depuis plus de deux d\u00e9cennies, et s\u2019il y a bien une chose que nous avons apprise, c\u2019est que tous les filtres ne se valent pas. Un filtre de qualit\u00e9\u00a0<strong>filtre en mousse c\u00e9ramique pour fonderie<\/strong> Ce filtre ne se contente pas de retenir les gros morceaux de scories. Il assure une filtration en profondeur sur l\u2019ensemble de sa structure tridimensionnelle, pi\u00e9geant ainsi des particules invisibles \u00e0 l\u2019\u0153il nu, mais qui apparaissent clairement lors d\u2019un examen aux rayons X ou d\u2019un essai de pression. Ce guide vous explique le fonctionnement de ces filtres, comment choisir celui qui vous convient et pourquoi les d\u00e9tails \u2014 taille des pores, composition chimique du mat\u00e9riau, placement ad\u00e9quat et choix du produit \u2014 sont d\u00e9terminants pour la qualit\u00e9 de vos r\u00e9sultats.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/web.whatsapp.com\/send?phone=8617344611163&amp;text=\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#ffffff;color:#e76d6d\">&nbsp;Si votre projet n\u00e9cessite l'utilisation d'un filtre en mousse c\u00e9ramique, n'h\u00e9sitez pas \u00e0 nous contacter pour obtenir un devis gratuit.&nbsp;<\/span><\/strong><\/em><\/a><\/p>\n<h2>En quoi consistent exactement les filtres en mousse c\u00e9ramique utilis\u00e9s dans les fonderies ?<\/h2>\n<p>A\u00a0<strong>filtre en mousse c\u00e9ramique<\/strong>\u00a0utilis\u00e9 dans un\u00a0<strong>fonderie<\/strong>\u00a0Le filtre est une structure c\u00e9ramique poreuse \u00e0 cellules ouvertes, g\u00e9n\u00e9ralement \u00e0 base d\u2019alumine, de carbure de silicium ou de zircone. Il est plac\u00e9 dans le syst\u00e8me de coul\u00e9e \u2014 tant\u00f4t dans le bac de coul\u00e9e, tant\u00f4t dans la canalisation de coul\u00e9e, tant\u00f4t dans un caisson de filtration s\u00e9par\u00e9 \u2014 et le m\u00e9tal en fusion s\u2019\u00e9coule \u00e0 travers lui pour rejoindre la cavit\u00e9 du moule. Les passages internes sinueux du filtre retiennent les inclusions solides gr\u00e2ce \u00e0 une combinaison d\u2019interception en surface, de pi\u00e9geage en profondeur et d\u2019agglom\u00e9ration des particules.<\/p>\n<p>Contrairement \u00e0 un simple treillis m\u00e9tallique ou \u00e0 un \u00e9l\u00e9ment filtrant \u00e0 fentes qui ne retient que les particules plus grosses que la taille des ouvertures, un\u00a0<strong>filtre en mousse c\u00e9ramique pour fonderie<\/strong>\u00a0fonctionne en trois dimensions. Les impuret\u00e9s peuvent \u00eatre retenues en profondeur dans le corps du filtre, et pas seulement \u00e0 sa surface. C'est pourquoi les filtres s'av\u00e8rent syst\u00e9matiquement plus efficaces que les autres m\u00e9thodes de nettoyage des m\u00e9taux en transit.<\/p>\n<p>La cl\u00e9 pour\u00a0<strong>filtres en mousse c\u00e9ramique pour fonderie<\/strong>\u00a0Il est important que les acheteurs comprennent que le filtre ne remplace pas les bonnes pratiques de fusion : il s'agit d'une garantie suppl\u00e9mentaire. Il reste indispensable de proc\u00e9der \u00e0 un d\u00e9gazage et \u00e0 un fluxage ad\u00e9quats, ainsi qu'\u00e0 un transfert minutieux du m\u00e9tal. Le filtre retient ce qui a \u00e9chapp\u00e9 \u00e0 toutes ces \u00e9tapes pr\u00e9c\u00e9dentes.<\/p>\n<h2>Pourquoi les filtres en mousse c\u00e9ramique sont-ils consid\u00e9r\u00e9s comme indispensables dans les fonderies modernes ?<\/h2>\n<p>Si vous dirigez une fonderie en 2025 et que vous n'utilisez pas\u00a0<strong>filtres en mousse c\u00e9ramique<\/strong>, soit vous coulez des lingots de tr\u00e8s mauvaise qualit\u00e9, soit vous d\u00e9pensez bien plus en retouches et en rebuts que vous ne le pensez. Les arguments \u00e9conomiques penchent d\u00e9sormais nettement en faveur de la filtration, et ce pour plusieurs raisons :<\/p>\n<p><strong>Les sp\u00e9cifications des clients l'exigent.<\/strong>\u00a0La plupart des plans de pi\u00e8ces moul\u00e9es destin\u00e9es aux secteurs automobile et a\u00e9rospatial exigent d\u00e9sormais explicitement une filtration. Si vous souhaitez r\u00e9pondre \u00e0 un appel d'offres pour des contrats de niveau 1, un\u00a0<strong>filtre en mousse c\u00e9ramique dans la fonderie<\/strong>\u00a0Le syst\u00e8me de contr\u00f4le d'acc\u00e8s est une condition incontournable.<\/p>\n<p><strong>La r\u00e9duction des d\u00e9chets permet de rentabiliser le filtre plusieurs fois.<\/strong>\u00a0Un filtre qui co\u00fbte un ou deux dollars peut permettre d'\u00e9conomiser une coul\u00e9e valant plusieurs centaines. Le calcul est simple et convaincant.<\/p>\n<p><strong>La filtration am\u00e9liore les propri\u00e9t\u00e9s m\u00e9caniques.<\/strong>\u00a0Un m\u00e9tal plus pur offre une r\u00e9sistance \u00e0 la traction plus \u00e9lev\u00e9e, un meilleur allongement et une dur\u00e9e de vie en fatigue am\u00e9lior\u00e9e. Il ne s'agit pas seulement d'\u00e9viter les d\u00e9fauts visibles, mais aussi de fabriquer un produit fondamentalement meilleur.<\/p>\n<p><strong>Cela permet de r\u00e9duire l'usure des outils d'usinage.<\/strong>\u00a0Les inclusions dures, telles que le spinelle ou les particules r\u00e9fractaires, usent pr\u00e9matur\u00e9ment les outils en carbure. Les \u00e9liminer avant qu\u2019elles n\u2019atteignent la pi\u00e8ce moul\u00e9e permet de prolonger la dur\u00e9e de vie des outils et de r\u00e9duire les co\u00fbts d\u2019usinage.<\/p>\n<p>Chez AdTech, nous avons constat\u00e9 que certaines fonderies avaient r\u00e9duit leur taux de rebut de 50%, voire davantage, apr\u00e8s \u00eatre pass\u00e9es \u00e0 un produit correctement sp\u00e9cifi\u00e9\u00a0<strong>filtre en mousse c\u00e9ramique pour leur fonderie<\/strong>\u00a0processus. Le retour sur investissement se mesure g\u00e9n\u00e9ralement en mois, et non en ann\u00e9es.<\/p>\n<h2>Comment fonctionnent r\u00e9ellement les filtres en mousse c\u00e9ramique dans une fonderie ?<\/h2>\n<p>Le m\u00e9canisme de filtration dans un\u00a0<strong>fonderie de filtres en mousse c\u00e9ramique<\/strong>\u00a0Cette application est plus complexe que la plupart des gens ne le pensent. Deux principes distincts entrent simultan\u00e9ment en jeu, et leur compr\u00e9hension vous aide \u00e0 prendre de meilleures d\u00e9cisions concernant le choix du PPI et le dimensionnement des filtres.<\/p>\n<p><strong>Le principe de filtration<\/strong>\u00a0retient les inclusions de plus grande taille : celles-ci sont physiquement bloqu\u00e9es par le maillage superficiel de la plaque filtrante lorsqu\u2019elles sont trop grosses pour passer \u00e0 travers le r\u00e9seau de pores externe. On peut consid\u00e9rer cela comme la premi\u00e8re ligne de d\u00e9fense : les particules grossi\u00e8res ne p\u00e9n\u00e8trent m\u00eame pas dans le corps du filtre.<\/p>\n<p><strong>Le principe de l'adsorption<\/strong>\u00a0Il retient toutes les particules plus petites : les inclusions de taille moyenne p\u00e9n\u00e8trent la surface ext\u00e9rieure mais sont pi\u00e9g\u00e9es par la structure maill\u00e9e interne, plus profond\u00e9ment dans le corps du filtre. Les minuscules inclusions \u2014 celles qui posent le plus de probl\u00e8mes dans les applications a\u00e9rospatiales et \u00e9lectroniques, car elles sont invisibles jusqu\u2019\u00e0 ce qu\u2019elles apparaissent aux rayons X \u2014 sont adsorb\u00e9es directement sur les surfaces internes du maillage par adh\u00e9rence chimique et physique.<\/p>\n<p>C'est ce m\u00e9canisme en deux \u00e9tapes qui fait la qualit\u00e9 d'un\u00a0<strong>filtre en mousse c\u00e9ramique<\/strong>\u00a0si efficace sur une large gamme de tailles de particules. Ce n\u2019est pas simplement un tamis ; c\u2019est un syst\u00e8me de capture tridimensionnel.<\/p>\n<p>Une fois appr\u00eat\u00e9, le m\u00e9tal s'\u00e9coule \u00e0 travers un r\u00e9seau complexe de pores interconnect\u00e9s. Le d\u00e9bit horaire d'un filtre donn\u00e9 est d\u00e9termin\u00e9 par plusieurs facteurs qui interagissent : la puret\u00e9 de l'aluminium liquide entrant, la pr\u00e9cision de filtration requise, la taille physique du filtre et l'indice PPI. Si ces param\u00e8tres sont correctement r\u00e9gl\u00e9s, le filtre fonctionne exactement comme pr\u00e9vu ; s'ils sont mal r\u00e9gl\u00e9s, soit le m\u00e9tal se solidifie \u00e0 froid en raison d'une restriction de d\u00e9bit, soit des inclusions passent \u00e0 travers sans encombre.<\/p>\n<figure id=\"attachment_84491\" aria-describedby=\"caption-attachment-84491\" style=\"width: 1219px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-84491\" src=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/ceramic-foam-filter-filtration-mechanism-in-foundries.webp\" alt=\"M\u00e9canisme de filtration par filtre en mousse c\u00e9ramique dans les fonderies\" width=\"1219\" height=\"665\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/ceramic-foam-filter-filtration-mechanism-in-foundries.webp 1408w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/ceramic-foam-filter-filtration-mechanism-in-foundries-300x164.webp 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/ceramic-foam-filter-filtration-mechanism-in-foundries-768x419.webp 768w\" sizes=\"auto, (max-width: 1219px) 100vw, 1219px\" \/><figcaption id=\"caption-attachment-84491\" class=\"wp-caption-text\"><em> M\u00e9canisme de filtration par filtre en mousse c\u00e9ramique dans les fonderies<\/em><\/figcaption><\/figure>\n<h2>Quels sont les principaux types de filtres en mousse c\u00e9ramique fabriqu\u00e9s par AdTech pour les fonderies ?<\/h2>\n<p>AdTech propose deux gammes de produits distinctes,<a href=\"https:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter-pal\/\" target=\"_blank\" rel=\"noopener\"><em><strong> <span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;Filtres en mousse c\u00e9ramique PAL&nbsp;<\/span>\u00a0<\/strong><\/em><\/a>et<a href=\"https:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter\/\" target=\"_blank\" rel=\"noopener\"><em><strong> <span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;Filtres en mousse c\u00e9ramique PHF&nbsp;<\/span><\/strong><\/em><\/a>, chacune \u00e9tant con\u00e7ue pour r\u00e9pondre \u00e0 des exigences sp\u00e9cifiques. D\u00e9terminer quelle gamme correspond \u00e0 votre production constitue le point de d\u00e9part de toute discussion sur la filtration.<\/p>\n<p><strong>PAL \u2014 S\u00e9rie des normes nationales<\/strong><\/p>\n<p>Il s'agit de notre produit phare, con\u00e7u pour une utilisation \u00e0 grande \u00e9chelle dans toute la gamme de production d'alliages d'aluminium de haute qualit\u00e9. La norme nationale PAL\u00a0<strong>filtre en mousse c\u00e9ramique<\/strong>\u00a0est le choix id\u00e9al pour :<\/p>\n<ul>\n<li>Pi\u00e8ces moul\u00e9es en alliage pour l'automobile<\/li>\n<li>Mat\u00e9riaux 3C (informatique, t\u00e9l\u00e9communications, \u00e9lectronique grand public)<\/li>\n<li>Fabrication de plaques d'immatriculation<\/li>\n<li>Ch\u00e2ssis et composants photovolta\u00efques<\/li>\n<li>Profil\u00e9s en aluminium \u00e0 usage industriel et civil<\/li>\n<li>Fabrication de t\u00f4les d'\u00e9paisseur moyenne et \u00e9paisse<\/li>\n<li>Composants en aluminium pour mobilier de bureau<\/li>\n<li>Moulage de mat\u00e9riaux composites<\/li>\n<\/ul>\n<p>Si votre production rel\u00e8ve de l'une de ces cat\u00e9gories, la norme nationale PAL constituera tr\u00e8s certainement votre point de d\u00e9part. Elle couvre l'ensemble de la gamme PPI ainsi que toutes les tailles de filtres standard, ce qui vous permet de r\u00e9pondre facilement \u00e0 vos exigences en mati\u00e8re de d\u00e9bit et de pr\u00e9cision de filtration.<\/p>\n<p><strong>PAL \u2014 S\u00e9rie \u00ab Norme europ\u00e9enne \u00bb<\/strong><\/p>\n<p>Cette gamme est con\u00e7ue et fabriqu\u00e9e selon des sp\u00e9cifications plus strictes pour des applications dans lesquelles la mati\u00e8re premi\u00e8re entre dans la composition de produits o\u00f9 la d\u00e9faillance n'est pas envisageable. Le filtre PAL conforme \u00e0 la norme europ\u00e9enne est destin\u00e9 \u00e0 :<\/p>\n<ul>\n<li>Mat\u00e9riaux a\u00e9ronautiques et composants structurels a\u00e9rospatiaux<\/li>\n<li>Applications dans le secteur de l'industrie militaire<\/li>\n<li>Pi\u00e8ces moul\u00e9es pour le transport ferroviaire<\/li>\n<li>Mat\u00e9riaux utilis\u00e9s pour les bo\u00eetes et leurs couvercles (lorsque la qualit\u00e9 de la surface rev\u00eat une importance cruciale sur le plan commercial)<\/li>\n<li>Feuilles pour batteries et feuilles \u00ab double z\u00e9ro \u00bb destin\u00e9es \u00e0 l'\u00e9lectronique<\/li>\n<li>Composants de produits \u00e9lectroniques<\/li>\n<li>Roues d'automobile (pour lesquelles une rupture par fatigue sous contrainte peut avoir des cons\u00e9quences catastrophiques)<\/li>\n<li>Plaque d'immatriculation<\/li>\n<\/ul>\n<p>La s\u00e9rie conforme aux normes europ\u00e9ennes impose des exigences de qualit\u00e9 des mati\u00e8res premi\u00e8res plus strictes et des tol\u00e9rances dimensionnelles plus serr\u00e9es que la norme nationale. Si votre client final fait partie de la fili\u00e8re a\u00e9rospatiale ou de la sous-traitance automobile et qu'il a des exigences de qualit\u00e9 \u00e0 la r\u00e9ception bien pr\u00e9cises, c'est le produit qu'il attend.<\/p>\n<p><strong>PHF \u2014 Gamme sans phosphore<\/strong><\/p>\n<p>Ce produit r\u00e9sout un probl\u00e8me sp\u00e9cifique et frustrant : les mat\u00e9riaux filtrants classiques peuvent r\u00e9agir avec le magn\u00e9sium pr\u00e9sent dans les alliages d'aluminium \u00e0 forte teneur en magn\u00e9sium, provoquant ainsi l'\u00e9rosion et la contamination du m\u00e9tal m\u00eame que vous essayez de nettoyer. La s\u00e9rie PHF \u00e9limine le phosphore de la composition chimique du filtre, ce qui permet de s'attaquer directement \u00e0 ce m\u00e9canisme de corrosion.<\/p>\n<p>Le PHF est con\u00e7u pour am\u00e9liorer la pr\u00e9cision de la filtration et r\u00e9soudre les probl\u00e8mes d'\u00e9rosion et de pollution auxquels sont confront\u00e9es les fonderies lors de la purification des alliages d'aluminium \u00e0 haute teneur en magn\u00e9sium. Si vous coulez des alliages de la s\u00e9rie 5xxx (5052, 5083, 5754) et que vous constatez une d\u00e9gradation des filtres en cours de coul\u00e9e ou des pics de contamination dans les mesures de votre spectrom\u00e8tre, la solution r\u00e9side tr\u00e8s certainement dans la s\u00e9rie PHF plut\u00f4t que de continuer \u00e0 vous d\u00e9battre avec des filtres standard.<\/p>\n<h2>Quelles sont les dimensions standard et les d\u00e9bits des filtres en mousse c\u00e9ramique AdTech ?<\/h2>\n<p>Le dimensionnement des filtres est souvent source de probl\u00e8mes pour de nombreuses fonderies. Si le filtre est trop petit, il restreint le d\u00e9bit, ce qui provoque des soudures \u00e0 froid. S'il est trop grand, l'amor\u00e7age du filtre risque de ne pas \u00eatre complet, ce qui signifie que le m\u00e9tal contourne la zone de filtration. Le tableau suivant pr\u00e9sente les sp\u00e9cifications de la s\u00e9rie PAL National Standard :<\/p>\n<div class=\"overflow-x-auto\">\n<table class=\"min-w-full\">\n<thead>\n<tr>\n<th class=\"whitespace-nowrap px-3 py-2\">Caract\u00e9ristiques techniques<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">12 pouces<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">15 pouces<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">17 pouces<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">20 pouces<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">23 pouces<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">26 pouces<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"px-3 py-2\">Pr\u00e9cision dimensionnelle (mm)<\/td>\n<td class=\"px-3 py-2\">\u00b12<\/td>\n<td class=\"px-3 py-2\">\u00b12<\/td>\n<td class=\"px-3 py-2\">\u00b12<\/td>\n<td class=\"px-3 py-2\">\u00b12<\/td>\n<td class=\"px-3 py-2\">\u00b13<\/td>\n<td class=\"px-3 py-2\">\u00b13<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">Surface de filtration (m\u00b2)<\/td>\n<td class=\"px-3 py-2\">0.076<\/td>\n<td class=\"px-3 py-2\">0.123<\/td>\n<td class=\"px-3 py-2\">0.162<\/td>\n<td class=\"px-3 py-2\">0.228<\/td>\n<td class=\"px-3 py-2\">0.307<\/td>\n<td class=\"px-3 py-2\">0.397<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">D\u00e9bit (kg\/min)<\/td>\n<td class=\"px-3 py-2\">90\u2013150<\/td>\n<td class=\"px-3 py-2\">140\u2013290<\/td>\n<td class=\"px-3 py-2\">180\u2013390<\/td>\n<td class=\"px-3 py-2\">270\u2013510<\/td>\n<td class=\"px-3 py-2\">380\u2013700<\/td>\n<td class=\"px-3 py-2\">450\u2013950<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">D\u00e9bit maximal pour une granulom\u00e9trie de 40 mesh (t\/h)<\/td>\n<td class=\"px-3 py-2\">10<\/td>\n<td class=\"px-3 py-2\">14<\/td>\n<td class=\"px-3 py-2\">20<\/td>\n<td class=\"px-3 py-2\">30<\/td>\n<td class=\"px-3 py-2\">40<\/td>\n<td class=\"px-3 py-2\">\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><em>Les caract\u00e9ristiques techniques correspondent aux performances de la s\u00e9rie AdTech PAL National Standard dans des conditions d'exploitation standard en fonderie. Les valeurs de d\u00e9bit s'appliquent \u00e0 une masse fondue propre dont la teneur en hydrog\u00e8ne est g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 0,15 ml\/100 g d'Al. Donn\u00e9es issues des essais internes de qualification des produits r\u00e9alis\u00e9s par AdTech en 2025.\u00a0<\/em><\/p>\n<p>La gamme s'\u00e9tend des filtres compacts de 12 pouces, adapt\u00e9s aux petits lots ou aux essais exp\u00e9rimentaux, jusqu'aux unit\u00e9s de 26 pouces capables de traiter pr\u00e8s d'une tonne de m\u00e9tal par minute. Pour la plupart des lignes de coul\u00e9e continue d\u2019aluminium, les tailles de 20 pouces et 23 pouces constituent les choix les plus courants, car elles offrent un bon compromis entre la surface de filtration et les dimensions pratiques des caissons de filtration standard.<\/p>\n<figure id=\"attachment_8958\" aria-describedby=\"caption-attachment-8958\" style=\"width: 680px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-8958\" src=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/05\/Ceramic-Foam-Filters-for-Casting-Industry.jpg\" alt=\"Usine de filtres en mousse c\u00e9ramique AdTech\" width=\"680\" height=\"544\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/05\/Ceramic-Foam-Filters-for-Casting-Industry.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/05\/Ceramic-Foam-Filters-for-Casting-Industry-300x240.jpg 300w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><figcaption id=\"caption-attachment-8958\" class=\"wp-caption-text\"><em>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Usine de filtres en mousse c\u00e9ramique AdTech<\/em><\/figcaption><\/figure>\n<h2>Comment choisir le PPI et la taille de filtre adapt\u00e9s \u00e0 votre production ?<\/h2>\n<p>C'est la question la plus concr\u00e8te que se pose tout acheteur dans le secteur de la fonderie, et c'est justement celle pour laquelle les conseils g\u00e9n\u00e9raux s'av\u00e8rent souvent insuffisants, car la r\u00e9ponse d\u00e9pend v\u00e9ritablement de vos besoins sp\u00e9cifiques en termes de d\u00e9bit et de qualit\u00e9. AdTech a mis au point un guide de s\u00e9lection qui regroupe les applications des produits, les d\u00e9bits, les classes PPI et les tailles de filtres au sein d'un cadre pratique.<\/p>\n<div class=\"overflow-x-auto\">\n<table class=\"min-w-full\">\n<thead>\n<tr>\n<th class=\"whitespace-nowrap px-3 py-2\">D\u00e9bit (t\/h)<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">10 PPI<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">20 PPI<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">30 PPI<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">40 PPI<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">50 PPI<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">60 PPI<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">80 PPI<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"px-3 py-2\">10<\/td>\n<td class=\"px-3 py-2\">12 pouces<\/td>\n<td class=\"px-3 py-2\">12 pouces<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">15<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<td class=\"px-3 py-2\">15 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">20<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">17 pouces<\/td>\n<td class=\"px-3 py-2\">20 pouces<\/td>\n<td class=\"px-3 py-2\">20 pouces<\/td>\n<td class=\"px-3 py-2\">20 pouces<\/td>\n<td class=\"px-3 py-2\">20 pouces<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">30<\/td>\n<td class=\"px-3 py-2\">20 pouces<\/td>\n<td class=\"px-3 py-2\">20 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">35<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">40<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">45<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">50<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">55<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">60<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">26 pouces<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">23 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">26 pouces \u00d7 2<\/td>\n<td class=\"px-3 py-2\">26 pouces \u00d7 2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><em>Les recommandations relatives \u00e0 la taille et \u00e0 la quantit\u00e9 des filtres s'appuient sur les directives techniques d'AdTech, \u00e9labor\u00e9es \u00e0 partir d'installations en production dans plus de 60 pays. Pour les lingots d'aluminium industriels et les profil\u00e9s extrud\u00e9s, la plage habituelle se situe entre 10 et 40 PPI ; pour les lingots de haute qualit\u00e9 et les profil\u00e9s destin\u00e9s \u00e0 l'a\u00e9rospatiale, une plage de 30 \u00e0 80 PPI est recommand\u00e9e.\u00a0<\/em><\/p>\n<p>Quelques remarques pratiques concernant la lecture de ce tableau :<\/p>\n<p><strong>Pour les lingots d'aluminium industriels et les profil\u00e9s extrud\u00e9s standard<\/strong>, une plage de 10 \u00e0 40 PPI est appropri\u00e9e. Un PPI plus faible garantit un meilleur d\u00e9bit et moins de r\u00e9sistance, ce qui est important lorsque l'on cherche \u00e0 optimiser le d\u00e9bit sur une ligne de coul\u00e9e continue.<\/p>\n<p><strong>Pour des lingots d'aluminium et des profil\u00e9s a\u00e9rospatiaux de haute qualit\u00e9<\/strong>, la densit\u00e9 de filtration se situe entre 30 et 80 PPI. Plus le filtre est fin, meilleure est la r\u00e9tention des inclusions, mais plus il faut contr\u00f4ler avec pr\u00e9cision la temp\u00e9rature du m\u00e9tal, la pression dans la t\u00eate de coul\u00e9e et le d\u00e9bit de coul\u00e9e pour garantir un amor\u00e7age homog\u00e8ne.<\/p>\n<p><strong>Les entr\u00e9es \u201c \u00d72 \u201d<\/strong>\u00a0\u2014 par exemple, 23\u2033\u00d72 \u2014 d\u00e9signe deux filtres mont\u00e9s en parall\u00e8le plut\u00f4t qu\u2019un seul filtre de plus grande taille. Cette approche est utilis\u00e9e lorsque les d\u00e9bits d\u00e9passent ce qu\u2019un seul grand filtre peut supporter tout en conservant l\u2019efficacit\u00e9 de filtration. Deux filtres de 23 pouces mont\u00e9s en parall\u00e8le offrent une surface de filtration sup\u00e9rieure \u00e0 celle d\u2019un seul filtre de 26 pouces, avec une meilleure r\u00e9partition des particules m\u00e9talliques sur toute la surface du filtre.<\/p>\n<h2>Quels sont les probl\u00e8mes les plus courants li\u00e9s aux filtres en mousse c\u00e9ramique dans les fonderies et comment y rem\u00e9dier ?<\/h2>\n<p>M\u00eame les bons filtres peuvent poser des probl\u00e8mes s'ils ne sont pas manipul\u00e9s ou install\u00e9s correctement. Voici les probl\u00e8mes que nous rencontrons le plus souvent :<\/p>\n<p><strong>Le filtre se fissure ou se casse pendant le coulage.<\/strong>\u00a0Cela est g\u00e9n\u00e9ralement d\u00fb \u00e0 un choc thermique : le filtre \u00e9tait trop froid au moment o\u00f9 le m\u00e9tal en fusion l'a touch\u00e9. Le pr\u00e9chauffage n\u2019est pas toujours n\u00e9cessaire, mais les filtres doivent \u00eatre stock\u00e9s dans un endroit chaud et sec. Certaines fonderies passent rapidement le filtre au chalumeau, mais un chauffage in\u00e9gal peut g\u00e9n\u00e9rer des contraintes suppl\u00e9mentaires. La meilleure solution consiste \u00e0 s\u2019assurer que le bo\u00eetier du filtre et le syst\u00e8me de coul\u00e9e sont correctement chauff\u00e9s avant le d\u00e9but de la coul\u00e9e.<\/p>\n<p><strong>Incomplete filter priming.<\/strong>\u00a0If metal doesn&#8217;t fully wet the filter face, flow is restricted and the mold may not fill. This often happens when the filter is placed in a location with insufficient metal head pressure. The fix is gating redesign \u2014 ensure at least 75\u2013100 mm of metal head above the filter for aluminum.<\/p>\n<p><strong>Bypass around the filter.<\/strong>\u00a0If the filter doesn&#8217;t seal tightly in its print, metal flows around the edges, completely defeating filtration. The filter print in the mold must match the filter dimensions with a slight compression fit. This is why AdTech&#8217;s dimensional accuracy \u2014 \u00b12 mm on standard sizes \u2014 matters in practice.<\/p>\n<p><strong>Filter erosion in ferrous applications.<\/strong>\u00a0In iron and steel, high temperature combined with turbulent flow can erode the filter material, introducing ceramic particles into the casting. This is why material selection \u2014 SiC or zirconia, not alumina \u2014 is non-negotiable for ferrous work.<\/p>\n<p><strong>High-magnesium alloy contamination.<\/strong>\u00a0Standard phosphorus-containing filters react with magnesium and erode progressively during the pour. If you&#8217;re casting 5xxx series and seeing mysterious spikes in contamination readings, you need the PHF series, not a different PPI grade of the standard product.<\/p>\n<figure id=\"attachment_84496\" aria-describedby=\"caption-attachment-84496\" style=\"width: 984px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-84496\" src=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/common-foundry-ceramic-foam-filter-problems.webp\" alt=\"common foundry ceramic foam filter problems\" width=\"984\" height=\"736\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/common-foundry-ceramic-foam-filter-problems.webp 1197w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/common-foundry-ceramic-foam-filter-problems-300x225.webp 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/common-foundry-ceramic-foam-filter-problems-768x575.webp 768w\" sizes=\"auto, (max-width: 984px) 100vw, 984px\" \/><figcaption id=\"caption-attachment-84496\" class=\"wp-caption-text\"><em> \u00a0common foundry ceramic foam filter problems<\/em><\/figcaption><\/figure>\n<h2>AdTech Real Case: Filtration Upgrade at a German Aluminum Wheel Foundry<\/h2>\n<p>In late 2022, a mid-sized aluminum wheel foundry in the Stuttgart region of Germany approached AdTech with a quality problem that was threatening a key customer relationship. They were producing low-pressure die cast wheels in A356 alloy for a premium European automotive brand, and their customer had tightened the acceptance criteria for internal porosity and inclusion content on machined surfaces.<\/p>\n<p><strong>Their existing setup:<\/strong>\u00a0The foundry was using a 15 PPI alumina filter from a local European supplier, placed in the sprue of each mold. Their melt practice included rotary degassing and flux injection, which was well-controlled. Nevertheless, they were seeing inclusion-related scrap rates of roughly 4.2%, plus an additional 1.8% of wheels that passed initial inspection but were rejected after machining when subsurface inclusions were exposed during finishing. Total quality-related cost was significant \u2014 not just in scrap, but in machining time wasted on parts that would ultimately fail.<\/p>\n<p><strong>Ce que nous avons fourni :<\/strong><\/p>\n<ul>\n<li>Initial trial order: 5,000 units of AdTech PAL European Standard alumina\u00a0<strong>filtres en mousse c\u00e9ramique<\/strong>, 20 PPI, custom dimension 120\u00d7120\u00d722 mm to match their existing filter print<\/li>\n<li>After successful trial: Ongoing supply contract for 20,000 filters per quarter<\/li>\n<li>Technical support: Two AdTech engineers on-site for three days to observe pouring practice, analyze gating design, and make recommendations<\/li>\n<\/ul>\n<p><strong>The diagnostic findings:<\/strong><\/p>\n<p>Our engineers spent the first day on the floor watching the process and collecting data before touching anything. Several things became apparent quickly:<\/p>\n<p>The 15 PPI filters they were using were too coarse for the fine inclusion population in their melt. Metallographic sections of rejected wheels showed inclusions in the 20\u201350 micron size range \u2014 exactly what slips through a 15 PPI filter but gets captured by 20 PPI. Their previous supplier had never questioned the PPI selection; they simply reordered whatever was on the original purchase order.<\/p>\n<p>The filter print in their mold tooling had worn slightly from repeated use, creating small gaps around the filter perimeter. These weren&#8217;t obvious to the eye but were enough to allow metal bypass on a percentage of pours.<\/p>\n<p>Their pouring temperature was running at the conservative low end of the recommended range to minimize hydrogen pickup, but this was borderline for consistent filter priming on every pour.<\/p>\n<p><strong>The changes we made:<\/strong><\/p>\n<p>We moved them to 20 PPI PAL European Standard filters \u2014 the right product for automotive wheel applications. We worked with their pattern shop to restore the filter print dimensions. We recommended a 10 \u00b0C increase in pouring temperature, keeping them within metallurgical spec but improving priming reliability. And we introduced a simple pre-pour checklist for operators covering filter seating confirmation, temperature verification, and degassing cycle completion.<\/p>\n<p><strong>Results after six months of operation:<\/strong><\/p>\n<ul>\n<li>Inclusion-related scrap rate dropped from\u00a0<strong>4.2% to 1.1%<\/strong><\/li>\n<li>Post-machining rejections fell from 1.8% to\u00a0<strong>under 0.4%<\/strong><\/li>\n<li>Overall casting yield improved by approximately 3.2 percentage points<\/li>\n<li>The foundry&#8217;s customer audited the updated process and approved the new filtration specification without conditions<\/li>\n<li>The wheel manufacturer placed the first quarterly order for 20,000 filters and has renewed every quarter since<\/li>\n<\/ul>\n<p>The foundry&#8217;s technical director described the improvement as &#8220;immediate and unambiguous.&#8221; It wasn&#8217;t one dramatic intervention \u2014 it was the combination of the right product specification (PAL European Standard at 20 PPI rather than a generic 15 PPI), precise dimensional fit, and a few straightforward process adjustments. Today they&#8217;re one of our most consistent European accounts.<\/p>\n<h2>How Do Ceramic Foam Filters Compare to Other Foundry Filtration Methods?<\/h2>\n<p>Foundries have several filtration options available. Understanding where\u00a0<strong>filtres en mousse c\u00e9ramique<\/strong>\u00a0sit in this landscape helps make the case internally when procurement asks why you&#8217;re not just using the cheap strainer cores.<\/p>\n<div class=\"overflow-x-auto\">\n<table class=\"min-w-full\">\n<thead>\n<tr>\n<th class=\"whitespace-nowrap px-3 py-2\">M\u00e9thode de filtration<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">Inclusion Capture Efficiency<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">Flow Restriction<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">Co\u00fbt unitaire<\/th>\n<th class=\"whitespace-nowrap px-3 py-2\">Meilleure application<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"px-3 py-2\">Ceramic foam filter (PAL\/PHF)<\/td>\n<td class=\"px-3 py-2\">80\u201398%<\/td>\n<td class=\"px-3 py-2\">Low to moderate<\/td>\n<td class=\"px-3 py-2\">Mod\u00e9r\u00e9<\/td>\n<td class=\"px-3 py-2\">Most aluminum and ferrous casting<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">Pressed strainer core<\/td>\n<td class=\"px-3 py-2\">40\u201360%<\/td>\n<td class=\"px-3 py-2\">Faible<\/td>\n<td class=\"px-3 py-2\">Tr\u00e8s faible<\/td>\n<td class=\"px-3 py-2\">Low-value, high-volume iron<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">Extruded cellular filter<\/td>\n<td class=\"px-3 py-2\">60\u201380%<\/td>\n<td class=\"px-3 py-2\">Mod\u00e9r\u00e9<\/td>\n<td class=\"px-3 py-2\">Mod\u00e9r\u00e9<\/td>\n<td class=\"px-3 py-2\">Steel with straight runner systems<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">Bonded particle filter<\/td>\n<td class=\"px-3 py-2\">85\u201395%<\/td>\n<td class=\"px-3 py-2\">\u00c9lev\u00e9<\/td>\n<td class=\"px-3 py-2\">\u00c9lev\u00e9<\/td>\n<td class=\"px-3 py-2\">Single-crystal aerospace castings<\/td>\n<\/tr>\n<tr>\n<td class=\"px-3 py-2\">No filtration<\/td>\n<td class=\"px-3 py-2\">0%<\/td>\n<td class=\"px-3 py-2\">Aucun<\/td>\n<td class=\"px-3 py-2\">Zero<\/td>\n<td class=\"px-3 py-2\">Not recommended<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>The ceramic foam filter wins on overall value in almost every realistic casting scenario. The strainer core is cheaper per unit but so much less effective that the scrap cost difference dwarfs the filter cost savings. The bonded particle filter is excellent but is priced for applications where the casting value justifies the investment \u2014 aircraft engine components, not automotive brackets.<\/p>\n<h2>What Should You Look for in a Ceramic Foam Filter Foundry Supplier?<\/h2>\n<p>Not all\u00a0<strong>filtres en mousse c\u00e9ramique pour fonderie<\/strong>\u00a0suppliers are equal. Here&#8217;s what separates a genuine technical partner from someone just selling boxes:<\/p>\n<p><strong>Consistent pore structure throughout the filter body.<\/strong>\u00a0Variable PPI within a single filter creates weak spots and uneven flow distribution. AdTech&#8217;s manufacturing process applies controlled slurry coating and sintering to achieve uniform pore structure from face to face.<\/p>\n<p><strong>Precise dimensional control.<\/strong>\u00a0Filters that vary in thickness or external dimensions create fit problems. Our standard tolerances of \u00b12 mm on most sizes ensure repeatable seating in the filter print.<\/p>\n<p><strong>Material purity appropriate for the application.<\/strong>\u00a0This is exactly why we differentiate between the National Standard, European Standard, and PHF series rather than offering one product for everything. Impurities in the ceramic raw materials cause erosion and melt contamination.<\/p>\n<p><strong>Multiple product lines for different alloy families.<\/strong>\u00a0A supplier with only one product type is going to try to sell it to you regardless of whether it&#8217;s the right fit. AdTech&#8217;s three-series range \u2014 PAL National, PAL European, PHF \u2014 means the recommendation changes based on your actual application.<\/p>\n<p><strong>Technical support that goes beyond the sales conversation.<\/strong>\u00a0Getting the filter selection right, the filter box design right, and the pour parameters right is a technical exercise. We support customers through on-site visits, remote troubleshooting, and application engineering guidance.<\/p>\n<p>If you&#8217;re evaluating\u00a0<strong>ceramic foam filters for your foundry<\/strong>, ask any supplier about all of these points. The answers will tell you quickly whether you&#8217;re dealing with a commodity vendor or a genuine partner.<\/p>\n<p style=\"text-align: center;\"><iframe loading=\"lazy\" title=\"Lecteur vid\u00e9o YouTube\" src=\"https:\/\/www.youtube.com\/embed\/iCtk9pdXOYE?si=vjj5fREJeZZh623i\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h2>The Bigger Picture: Filtration as Part of a Complete Melt Quality System<\/h2>\n<p>A\u00a0<strong>filtre en mousse c\u00e9ramique<\/strong>\u00a0is not a magic wand. It can&#8217;t fix badly gas-porous metal, it can&#8217;t remove dissolved hydrogen, and it can&#8217;t compensate for poor gating design. But as the final stage of a comprehensive melt quality program \u2014 degassing, fluxing, clean transfer practices, well-designed gating, and proper filtration \u2014 the results are transformative.<\/p>\n<p>At AdTech, we supply more than just filters. We manufacture<a href=\"https:\/\/www.alalloycasting.com\/fr\/degassing-unit\/\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u00a0\u00e9quipement de d\u00e9gazage rotatif&nbsp;<\/span><\/strong><\/em><\/a> for hydrogen removal, refining fluxes for inclusion agglomeration, and a full line of <a href=\"https:\/\/www.aluminiumceramicfiber.com\/portfolio\/ceramic-foam-filter\/\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;ceramic foam filters for foundry&nbsp;<\/span>\u00a0<\/strong><\/em><\/a>applications across all alloy families. The products are designed to work together as a system, not as isolated components.<\/p>\n<p>The sequence matters: degas the metal first to hit your target hydrogen level, flux to agglomerate fine oxides, transfer cleanly with minimal turbulence, and then let the\u00a0<strong>filtre en mousse c\u00e9ramique<\/strong>\u00a0catch whatever the upstream steps didn&#8217;t. Each step makes the next one more effective. Foundries that get this chain right \u2014 and use quality products at each link \u2014 are the ones posting scrap rates below 2% while their competitors fight fires at 8\u201310%.<\/p>\n<p>Clean metal is profitable metal. To discuss how AdTech&#8217;s\u00a0<strong>filtres en mousse c\u00e9ramique<\/strong> and complementary<a href=\"https:\/\/www.alalloycasting.com\/fr\/products\/\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u00a0melt treatment products\u00a0&nbsp;<\/span><\/strong><\/em><\/a>can improve your casting quality, contact our technical sales team. We&#8217;ve helped foundries in over 60 countries clean up their metal \u2014 we can do the same for yours.<\/p>\n<h2>FAQ<\/h2>\n<details>\n<summary>1. What exactly is a ceramic foam filter and why is it used in foundries?<\/summary>\n<p>A\u00a0<strong>filtre en mousse c\u00e9ramique<\/strong>\u00a0is a porous, three-dimensional ceramic structure placed in the gating system to trap solid inclusions\u2014like oxides, slag, and refractory particles\u2014before molten metal enters the mold cavity. In foundries, they are essential for producing high-quality castings (especially automotive and aerospace parts) where even tiny inclusions can cause leaks or mechanical failure. Unlike simple strainers, these filters perform &#8220;depth filtration,&#8221; capturing particles throughout the entire body of the filter, not just on the surface.<\/p>\n<\/details>\n<details>\n<summary>2. How do you choose the right PPI (Pores Per Inch) for your filter?<\/summary>\n<p>PPI selection depends on your alloy type and the required filtration precision.<strong>10 \u00e0 20 PPI<\/strong>: Best for general industrial aluminum, iron, and high-flow applications where coarse filtration is sufficient.<strong>30 \u00e0 40 PPI<\/strong>: Standard for automotive and high-quality aluminum alloys (like A356) to remove fine oxides.<strong>50\u201380 PPI<\/strong>: Reserved for aerospace, electronics, and premium applications requiring ultra-clean metal.<\/p>\n<\/details>\n<details>\n<summary>3. What is the difference between AdTech\u2019s PAL and PHF filter series?<\/summary>\n<p>AdTech offers specialized series for different needs:<strong>PAL (National &amp; European Standard)<\/strong>: The standard alumina-silicate filters. The European Standard has tighter tolerances for high-end applications like aviation and can stock.<strong>PHF (Phosphorus-Free)<\/strong>: Specifically designed for\u00a0<strong>high-magnesium aluminum alloys<\/strong>\u00a0(5xxx series). Standard filters contain phosphorus, which can react with magnesium, causing filter erosion and melt contamination. PHF eliminates this chemical reaction.<\/p>\n<\/details>\n<details>\n<summary>4. Can ceramic foam filters remove dissolved hydrogen from aluminum?<\/summary>\n<p>No. Ceramic foam filters are designed to remove solid inclusions, not dissolved gases. To remove hydrogen, you need a rotary degassing unit (using nitrogen or argon) before the metal reaches the filter. The filter is the final &#8220;polishing&#8221; step. If you try to rely on the filter alone for degassing, you will likely get porosity issues because the filter can trap gas bubbles, causing turbulence.<\/p>\n<\/details>\n<details>\n<summary>5. What happens if the filter cracks or breaks during pouring?<\/summary>\n<p>Filter cracking is usually caused by thermal shock (placing a cold filter into hot metal) or mechanical impact.Prevention: Store filters in a warm, dry place. While preheating isn&#8217;t always mandatory for aluminum, ensuring the filter box\/mold is warm helps.Consequence: A cracked filter loses structural integrity, allowing metal to bypass the filtration zone or introducing ceramic shards into the casting, which is a catastrophic defect.<\/p>\n<\/details>\n<details>\n<summary>6. How do flow rate and filter size relate to each other?<\/summary>\n<p>The flow rate (measured in kg\/min or t\/h) determines the physical size of the filter you need. If the filter is too small for the flow rate, it will restrict the metal, causing misruns or cold shuts.<\/p>\n<\/details>\n<details>\n<summary>7. Do I need to preheat ceramic foam filters before use?<\/summary>\n<p>For most aluminum casting, preheating is not strictly necessary if the mold\/filter box is already hot, but it is highly recommended for consistency. For iron and steel casting, gentle preheating (200\u2013300\u00b0C) is often required to prevent thermal shock cracking. Always check the specific product guidelines, but generally, keeping the filter dry and at ambient temperature is the minimum requirement.<\/p>\n<\/details>\n<details>\n<summary>8. Why are &#8220;bypass&#8221; and &#8220;leakage&#8221; common complaints with filters?<\/summary>\n<p>This usually happens when the filter print (the mold cavity holding the filter) doesn&#8217;t match the filter dimensions precisely.If the print is too loose, molten metal flows around the filter instead of through it.<br \/>\nIf the print is too tight, it can crush the filter.AdTech filters are manufactured with tight dimensional tolerances (\u00b12mm to \u00b13mm) to minimize this risk, but the mold design must match.<\/p>\n<\/details>\n<details>\n<summary>9. Can I reuse a ceramic foam filter?<\/summary>\n<p>Absolutely not. Ceramic foam filters are single-use products. Once metal flows through them, the pores are clogged with inclusions, and the ceramic structure may have micro-cracks from thermal stress. Reusing a filter will almost certainly introduce old slag back into fresh metal and cause flow restriction. The cost of one filter is negligible compared to the cost of a scrapped casting.<\/p>\n<\/details>\n<details>\n<summary>10. How long does a ceramic foam filter last in a high-temperature pour?<\/summary>\n<p>The filter is designed to withstand the temperature of the molten metal for the duration of a single pour (usually seconds to a few minutes).Alumina filters: Withstand up to ~1100\u00b0C (for Aluminum\/Zinc).<br \/>\nSilicon Carbide\/Zirconia: Withstand up to 1500\u00b0C+ (for Iron\/Steel). The filter doesn&#8217;t &#8220;expire&#8221; due to time, but rather due to thermal stress and erosion. As long as the chemistry matches the alloy, it will maintain integrity until the metal solidifies.<\/p>\n<\/details>","protected":false},"excerpt":{"rendered":"<p>Every foundry manager knows the moment: you open the mold, and right there on the machined face of an expensive casting is a dark smudge\u2014an&hellip;<\/p>","protected":false},"author":1,"featured_media":7658,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[1598,1599,1595,485,1455,1454,1451,432,486,1456,422,1597,418,1453,417,412,1452,298,1596,406,1594,405],"class_list":["post-7655","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-20-ppi-filter-foam","tag-30-ppi-filter-foam","tag-alumina-filter","tag-aluminum-casting-filter","tag-asian-foundry-filters","tag-casting-filter","tag-ceramic-disc-filter","tag-ceramic-filter-foundry","tag-ceramic-filter-manufacturers","tag-ceramic-foundry-filter","tag-filter-foam-manufacturers","tag-filter-foundry","tag-foundry-ceramic-filters","tag-foundry-filter","tag-foundry-filters","tag-metal-foam-filter","tag-molten-metal-filtration","tag-porous-ceramic-filter","tag-silicon-carbide-ceramic-filter","tag-silicon-carbide-ceramic-foam-filter","tag-silicon-carbide-filter","tag-silicon-carbide-foam-filter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ceramic Foam Filters Foundry: A Practical Guide to Cleaner Metal<\/title>\n<meta name=\"description\" content=\"Learn how ceramic foam filters improve foundry casting quality. 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