{"id":22343,"date":"2024-07-30T12:01:56","date_gmt":"2024-07-30T04:01:56","guid":{"rendered":"https:\/\/firstmold.com\/?post_type=case-study&#038;p=22343"},"modified":"2025-07-24T11:08:38","modified_gmt":"2025-07-24T03:08:38","slug":"engine-valve-cover-manufacturing","status":"publish","type":"case-study","link":"https:\/\/firstmold.com\/fr\/case-study\/engine-valve-cover-manufacturing\/","title":{"rendered":"Fabrication de couvercles de soupapes de moteur par moulage sous pression"},"content":{"rendered":"<p>Un client mexicain du secteur automobile a demand\u00e9 \u00e0 First Mold de fabriquer une s\u00e9rie de couvercles de soupapes de moteur. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-requirements-for-engine-valve-covers-manufacturing\">Exigences relatives \u00e0 la fabrication de couvercles de soupapes de moteur<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mat\u00e9riau<\/strong>: Alliage d'aluminium (AlSi10Mg) \u00e0 la fois l\u00e9ger et r\u00e9sistant pour r\u00e9duire le poids du v\u00e9hicule et am\u00e9liorer le rendement \u00e9nerg\u00e9tique.<\/li>\n\n\n\n<li><strong>Finition de la surface<\/strong>: Une surface lisse et r\u00e9sistante \u00e0 la corrosion avec une tol\u00e9rance de \u00b10,1 mm.<\/li>\n\n\n\n<li><strong>Volume de production<\/strong>: 50 000 unit\u00e9s par an.<\/li>\n\n\n\n<li><strong>Rapport co\u00fbt-efficacit\u00e9<\/strong>: Des prix comp\u00e9titifs tout en maintenant une qualit\u00e9 \u00e9lev\u00e9e.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-engine-valve-covers-manufacturing-process\">Processus de fabrication des couvercles de soupapes de moteur<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-design-review-and-tooling-development\">Examen de la conception et d\u00e9veloppement de l'outillage<\/h3>\n\n\n\n<p>Apr\u00e8s avoir re\u00e7u la conception de ce client, l'\u00e9quipe d'ing\u00e9nieurs de First Mold a proc\u00e9d\u00e9 \u00e0 un examen approfondi de la conception. <a href=\"https:\/\/firstmold.com\/fr\/guides\/dfm\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>examen de la conception<\/strong><\/a> afin d'en garantir la fabricabilit\u00e9. L'\u00e9quipe a identifi\u00e9 des probl\u00e8mes potentiels tels que des sections de paroi minces et des g\u00e9om\u00e9tries complexes, qui pourraient entra\u00eener des d\u00e9fauts de coul\u00e9e. Une fili\u00e8re personnalis\u00e9e a \u00e9t\u00e9 con\u00e7ue, int\u00e9grant des caract\u00e9ristiques telles que l'optimisation de l'\u00e9paisseur de la paroi et de la g\u00e9om\u00e9trie. <a href=\"https:\/\/firstmold.com\/fr\/guides\/injection-molding-gate\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>les syst\u00e8mes de fermeture et d'a\u00e9ration<\/strong><\/a> afin d'am\u00e9liorer le flux de mat\u00e9riaux et de r\u00e9duire la porosit\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-die-casting-process\">Processus de moulage sous pression<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Pr\u00e9paration de la matrice<\/strong>: Le moule a \u00e9t\u00e9 pr\u00e9chauff\u00e9 \u00e0 200\u00b0C pour \u00e9viter les chocs thermiques et assurer un \u00e9coulement uniforme du mat\u00e9riau.<\/li>\n\n\n\n<li><strong>Casting<\/strong>: L'alliage d'aluminium en fusion a \u00e9t\u00e9 inject\u00e9 dans l'appareil. <a href=\"https:\/\/firstmold.com\/fr\/guides\/mold-cavity-and-mold-core\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>cavit\u00e9 du moule<\/strong><\/a> \u00e0 une pression de 1 500 bars<\/li>\n\n\n\n<li><strong>Refroidissement et \u00e9jection<\/strong>: La pi\u00e8ce a \u00e9t\u00e9 refroidie et solidifi\u00e9e en 30 secondes, puis \u00e9ject\u00e9e automatiquement de la matrice.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-finishing-and-quality-control\">Finition et contr\u00f4le de la qualit\u00e9<\/h3>\n\n\n\n<p>Apr\u00e8s le moulage, les couvercles de soupapes ont \u00e9t\u00e9 soumis \u00e0 une s\u00e9rie de processus de finition, notamment l'\u00e9barbage, le grenaillage et l'usinage. Un rev\u00eatement en poudre de haute qualit\u00e9 a \u00e9t\u00e9 appliqu\u00e9 pour am\u00e9liorer la r\u00e9sistance \u00e0 la corrosion et l'esth\u00e9tique.<\/p>\n\n\n\n<p>First Mold a employ\u00e9 des m\u00e9thodes rigoureuses <a href=\"https:\/\/firstmold.com\/fr\/quality-control\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>mesures de contr\u00f4le de la qualit\u00e9<\/strong><\/a>L'inspection de la qualit\u00e9 des produits, y compris l'inspection dimensionnelle \u00e0 l'aide de machines \u00e0 mesurer tridimensionnelles (MMT) et l'inspection par rayons X pour d\u00e9tecter les d\u00e9fauts internes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-challenges-and-solutions-in-engine-valve-cover-manufacturing\">D\u00e9fis et solutions dans la fabrication de couvercles de soupapes de moteur<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-porosity-issues\">Questions relatives \u00e0 la porosit\u00e9<\/h3>\n\n\n\n<p><strong>Enjeu<\/strong>: Au cours de la phase de production initiale, certains couvercles de soupapes pr\u00e9sentaient une porosit\u00e9, un d\u00e9faut courant de moulage sous pression caract\u00e9ris\u00e9 par la pr\u00e9sence de petits vides ou de poches de gaz dans le m\u00e9tal. Ce d\u00e9faut compromettait l'int\u00e9grit\u00e9 structurelle des pi\u00e8ces.<\/p>\n\n\n\n<p><strong>Solution<\/strong>: L'\u00e9quipe d'ing\u00e9nieurs a mis en \u0153uvre une technique de moulage sous pression assist\u00e9e par le vide, qui a permis de r\u00e9duire consid\u00e9rablement l'emprisonnement de l'air et de garantir un moulage dense et sans d\u00e9faut.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-warpage\">L'arr\u00eat de travail<\/h3>\n\n\n\n<p><strong>Enjeu<\/strong>: La complexit\u00e9 de la conception a entra\u00een\u00e9 un l\u00e9ger gauchissement pendant le refroidissement, ce qui a affect\u00e9 la plan\u00e9it\u00e9 de la pi\u00e8ce. Le gauchissement est un probl\u00e8me courant dans le moulage sous pression, caus\u00e9 par des vitesses de refroidissement in\u00e9gales ou des contraintes dans le mat\u00e9riau.<\/p>\n\n\n\n<p><strong>Solution<\/strong>: En optimisant la vitesse de refroidissement et en redessinant les canaux de refroidissement \u00e0 l'int\u00e9rieur de la matrice, First Mold a obtenu un refroidissement uniforme, minimisant le gauchissement et garantissant la pr\u00e9cision dimensionnelle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-results\">R\u00e9sultats<\/h2>\n\n\n\n<p>First Mold a fabriqu\u00e9 avec succ\u00e8s 9 000 unit\u00e9s de couvercles de soupapes de moteur de haute qualit\u00e9 pour ce client, qui nous a fait des compliments.<\/p>","protected":false},"excerpt":{"rendered":"<p>First Mold excelle dans la fabrication de couvercles de soupapes de moteur de haute qualit\u00e9, en surmontant les d\u00e9fis et en fournissant des pi\u00e8ces pr\u00e9cises et rentables.<\/p>","protected":false},"author":2,"featured_media":22351,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"case-study-category":[89],"case-study-tag":[72],"class_list":["post-22343","case-study","type-case-study","status-publish","has-post-thumbnail","hentry","case-study-category-die-casting-cases","case-study-tag-automotive"],"acf":{"photo_gallery":{"case_study_gallery":[[{"id":22352,"title":"The inner surface of the engine valve cover","caption":"The inner surface of the engine valve cover","full_image_url":"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/07\/The-inner-surface-of-the-engine-valve-cover.webp","thumbnail_image_url":"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/07\/The-inner-surface-of-the-engine-valve-cover-150x150.webp","large_srcset":"https:\/\/firstmold.com\/wp-content\/uploads\/2024\/07\/The-inner-surface-of-the-engine-valve-cover.webp 800w, 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