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Moulage m\u00e9tallique et alliages de fonderie<\/h1>\n
Le moulage m\u00e9tallique est l’un des proc\u00e9d\u00e9s de fabrication les plus anciens et les plus polyvalents qui existent. Dans son principe, le moulage consiste \u00e0 verser ou injecter du m\u00e9tal en fusion dans un moule, \u00e0 le laisser se solidifier en une forme pr\u00e9cise, puis \u00e0 retirer la pi\u00e8ce finie. Le proc\u00e9d\u00e9 est capable de produire des composants allant de simples supports \u00e0 des g\u00e9om\u00e9tries hautement complexes \u00e0 parois minces, difficiles ou impossibles \u00e0 obtenir par d’autres m\u00e9thodes de fabrication.<\/p>\n
La technologie de moulage moderne \u2014 et le moulage sous haute pression en particulier \u2014 a rendu le processus plus rapide, plus r\u00e9p\u00e9table et plus pr\u00e9cis que jamais, en faisant un pilier de la production de masse dans les secteurs automobile, a\u00e9rospatial, \u00e9lectronique, industriel et des biens de consommation.<\/p>\n
Moulage m\u00e9tallique<\/h2>\n
Le m\u00e9tal en fusion est inject\u00e9 dans un moule en acier tremp\u00e9 sous haute pression, produisant des pi\u00e8ces avec des tol\u00e9rances serr\u00e9es, une excellente finition de surface et une haute r\u00e9p\u00e9tabilit\u00e9. Le moulage sous haute pression est le mieux adapt\u00e9 \u00e0 la production en grand volume de composants complexes en alliages d’aluminium et de zinc. Il s’agit du processus principal de Norfran \u2014 disponible pour le moulage sous pression en zinc et en aluminium.<\/p>\n
Alliages de fonderie<\/h2>\n
Le choix de l’alliage a un impact significatif sur les propri\u00e9t\u00e9s, les performances et le co\u00fbt d’une pi\u00e8ce moul\u00e9e finie. Les alliages de fonderie les plus largement utilis\u00e9s sont pr\u00e9sent\u00e9s ci-dessous.<\/p>\n
Alliages d’aluminium<\/h3>\n
L’aluminium est le mat\u00e9riau de moulage sous pression le plus largement sp\u00e9cifi\u00e9, appr\u00e9ci\u00e9 pour sa combinaison de faible densit\u00e9, de bonne r\u00e9sistance, d’excellente r\u00e9sistance \u00e0 la corrosion et de conductivit\u00e9 thermique et \u00e9lectrique. Les alliages d’aluminium sont largement utilis\u00e9s dans les secteurs automobile, a\u00e9rospatial et \u00e9lectronique, et sont enti\u00e8rement recyclables sans perte de propri\u00e9t\u00e9s m\u00e9caniques. Les alliages de coul\u00e9e en aluminium courants comprennent LM2 (EN AC 46100), LM6 (EN AC 44100), EN AC 43400 et EN AC 44300, offrant chacun des \u00e9quilibres l\u00e9g\u00e8rement diff\u00e9rents entre coulabilit\u00e9, r\u00e9sistance et r\u00e9sistance \u00e0 la corrosion. Le service de moulage sous pression en aluminium de Norfran utilise des machines \u00e0 chambre froide allant de 180 \u00e0 800 tonnes, adapt\u00e9es \u00e0 une large gamme de tailles de composants.<\/p>\n
Alliages de zinc<\/h3>\n
Le zinc est le plus facile \u00e0 couler des m\u00e9taux courants et offre une excellente pr\u00e9cision dimensionnelle, une belle finition de surface et la capacit\u00e9 de couler des parois tr\u00e8s minces et des d\u00e9tails complexes. Son point de fusion plus bas par rapport \u00e0 l’aluminium le rend bien adapt\u00e9 au moulage sous pression \u00e0 chambre chaude, ce qui se traduit par des temps de cycle plus courts et une dur\u00e9e de vie des outils plus longue. Les alliages de zinc sont largement utilis\u00e9s pour les petits composants complexes dans les industries automobile, \u00e9lectrique et des biens de consommation. Les alliages courants comprennent le Zamak 3, le Zamak 5 et le ZA-8, qui offrent des \u00e9quilibres variables entre r\u00e9sistance, r\u00e9sistance au fluage et coulabilit\u00e9. Le service de moulage sous pression en zinc de Norfran prend en charge des pi\u00e8ces moul\u00e9es de 0,002 kg \u00e0 9,00 kg.<\/p>\n
Choisir le bon alliage<\/h2>\n
La s\u00e9lection de l’alliage de fonderie le plus appropri\u00e9 d\u00e9pend d’un certain nombre de facteurs, notamment les propri\u00e9t\u00e9s m\u00e9caniques requises, l’environnement de fonctionnement, la complexit\u00e9 de la g\u00e9om\u00e9trie du composant, le volume de production et le co\u00fbt cible. Dans de nombreux cas, changer d’alliage ou de proc\u00e9d\u00e9 de moulage peut apporter des avantages significatifs en termes de poids, de performance ou de co\u00fbt unitaire.<\/p>\n
L’\u00e9quipe d’ing\u00e9nierie de Norfran est exp\u00e9riment\u00e9e dans le conseil aux clients sur la s\u00e9lection des alliages et des proc\u00e9d\u00e9s d\u00e8s les premi\u00e8res \u00e9tapes d’un projet. Notre service de conception et de gestion de projet est disponible pour aider \u00e0 garantir que les bonnes d\u00e9cisions sont prises avant que l’outillage ne soit engag\u00e9.<\/p>\n
Pour des conseils techniques d\u00e9taill\u00e9s sur les tol\u00e9rances de moulage sous pression et les consid\u00e9rations de conception, consultez notre section de ressources techniques.<\/p>\n<\/div>\n
<\/p>","protected":false},"excerpt":{"rendered":"
Moulage m\u00e9tallique et alliages de fonderie Le moulage m\u00e9tallique est l’un des proc\u00e9d\u00e9s de fabrication les plus anciens et les plus polyvalents qui existent. Dans son principe, le moulage consiste \u00e0 verser ou injecter du m\u00e9tal en fusion dans un moule, \u00e0 le laisser se solidifier en une forme pr\u00e9cise, puis \u00e0 retirer la pi\u00e8ce finie. Le proc\u00e9d\u00e9 est capable de produire des composants allant de simples supports \u00e0 des g\u00e9om\u00e9tries hautement complexes \u00e0 parois minces, difficiles ou impossibles \u00e0…<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-36573","page","type-page","status-publish","hentry"],"yoast_head":"\n
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