{"id":4573,"date":"2025-09-19T00:00:15","date_gmt":"2025-09-18T16:00:15","guid":{"rendered":"https:\/\/www.oc-epc.com\/?p=4573"},"modified":"2025-09-16T13:59:41","modified_gmt":"2025-09-16T05:59:41","slug":"top-2-quality-challenges-in-lost-foam-casting-and-how-to-overcome-them","status":"publish","type":"post","link":"https:\/\/www.oc-epc.com\/vi\/tin-tuc-blog\/tin-tuc-nganh\/2-thach-thuc-chat-luong-hang-dau-trong-duc-bot-bi-mat-va-lam-the-nao-de-vuot-qua-chung\/","title":{"rendered":"2 th\u00e1ch th\u1ee9c ch\u1ea5t l\u01b0\u1ee3ng h\u00e0ng \u0111\u1ea7u trong \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 v\u01b0\u1ee3t qua ch\u00fang"},"content":{"rendered":"<p><a style=\"text-decoration: underline;\" href=\"https:\/\/www.oc-epc.com\/vi\/truong-hop\/\"><strong>M\u1ea5t b\u1ecdt \u0111\u00fac<\/strong><\/a> l\u00e0 m\u1ed9t c\u00e1ch hi\u1ec7n \u0111\u1ea1i \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh kim lo\u1ea1i v\u1edbi m\u1ed9t s\u1ed1 l\u1ee3i \u00edch tuy\u1ec7t v\u1eddi, nh\u01b0 k\u00edch th\u01b0\u1edbc si\u00eau ch\u00ednh x\u00e1c, \u00edt c\u1ea7n c\u1eaft th\u00eam v\u00e0 t\u1ef1 do thi\u1ebft k\u1ebf h\u00ecnh d\u1ea1ng \u0111\u1ed9c \u0111\u00e1o. Nh\u01b0ng nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 h\u00e0ng \u0111\u1ea7u m\u1ed7i l\u1ea7n c\u00f3 ngh\u0129a l\u00e0 gi\u1ea3i quy\u1ebft hai tr\u1edf ng\u1ea1i l\u1edbn: ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c m\u1eabu ho\u00e0n h\u1ea3o. Hai \u0111i\u1ec1u n\u00e0y l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 tr\u00e1nh l\u1ed7i v\u00e0 gi\u1eef cho s\u1ea3n xu\u1ea5t tr\u01a1n tru.<\/p>\n<div style=\"text-align: center;\"><img decoding=\"async\" src=\"http:\/\/www.oc-epc.com\/wp-content\/uploads\/2025\/09\/Lost-Foam-Casting-products-1.webp\" alt=\"S\u1ea3n ph\u1ea9m \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t\" \/><\/div>\n<h2 id=\"key-aspect-1-material-selection\">Kh\u00eda c\u1ea1nh ch\u00ednh 1: L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u<\/h2>\n<h3 id=\"lost-foam-casting-foam-beads\">M\u1ea5t b\u1ecdt \u0111\u00fac b\u1ecdt h\u1ea1t<\/h3>\n<p>Lo\u1ea1i h\u1ea1t b\u1ecdt \u0111\u01b0\u1ee3c ch\u1ecdn cho \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t \u0111\u00f3ng m\u1ed9t vai tr\u00f2 r\u1ea5t l\u1edbn trong m\u1ea3nh cu\u1ed1i c\u00f9ng tr\u00f4ng m\u1ecbn nh\u01b0 th\u1ebf n\u00e0o, c\u00e1c ph\u00e9p \u0111o ch\u00ednh x\u00e1c c\u1ee7a n\u00f3 v\u00e0 n\u00f3 m\u1ea1nh m\u1ebd nh\u01b0 th\u1ebf n\u00e0o b\u00ean trong.<\/p>\n<h4 id=\"eps-expanded-polystyrene\">EPS (Polystyrene m\u1edf r\u1ed9ng)<\/h4>\n<p>EPS l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho \u0111\u00fac nh\u00f4m, \u0111\u1ed3ng, s\u1eaft x\u00e1m v\u00e0 th\u00e9p carbon trung b\u00ecnh \u0111\u1ebfn cao khi s\u1ef1 t\u00edch t\u1ee5 carbon kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t m\u1ed1i lo l\u1eafng. N\u00f3 d\u1ec5 d\u00e0ng tr\u00ean v\u00ed, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 c\u00e1c \u0111i\u1ec3m carbon b\u00f3ng tr\u00ean c\u00e1c m\u1ea3nh s\u1eaft ho\u1eb7c d\u00ednh carbon th\u00eam v\u00e0o b\u1ec1 m\u1eb7t th\u00e9p.<\/p>\n<h4 id=\"stmma-styrene-methyl-methacrylate-copolymer\">STMMA (Styrene Methyl Methacrylate Copolymer)<\/h4>\n<p>STMMA k\u1ebft h\u1ee3p nh\u1eefng \u0111i\u1ec1u t\u1ed1t nh\u1ea5t c\u1ee7a EPS v\u00e0 EPMMA, v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh n\u00f3 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u \u0111\u00fac kh\u00e1c nhau. N\u00f3 ho\u1ea1t \u0111\u1ed9ng th\u1ef1c s\u1ef1 t\u1ed1t cho c\u00e1c m\u1ea3nh s\u1eaft ductile kh\u00f4ng th\u1ec3 x\u1eed l\u00fd c\u00e1c bit carbon ho\u1eb7c cho c\u00e1c b\u1ed9 ph\u1eadn m\u1ecfng c\u1ea7n k\u1ebft th\u00fac thanh l\u1ecbch.<\/p>\n<h4 id=\"epmma-expanded-polymethyl-methacrylate\">EPMMA (Polymethyl Methacrylate m\u1edf r\u1ed9ng)<\/h4>\n<p>EPMMA l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea3nh th\u00e9p h\u1ee3p kim c\u1ea7n m\u1ed9t b\u1ec1 m\u1eb7t si\u00eau s\u1ea1ch s\u1ebd v\u00ec n\u00f3 c\u1eaft gi\u1ea3m c\u00e1c khi\u1ebfm khuy\u1ebft nh\u01b0 n\u1ebfp nh\u0103n ho\u1eb7c n\u1ee9t t\u1ed1i. Nh\u01b0ng h\u00e3y nh\u1edb r\u1eb1ng n\u00f3 gi\u1ea3i ph\u00f3ng kho\u1ea3ng 1,5 l\u1ea7n kh\u00ed nhi\u1ec1u h\u01a1n EPS.<\/p>\n<p>Khi ch\u1ecdn \u0111\u00fang h\u1ea1t, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 suy ngh\u0129 v\u1ec1 v\u1eadt li\u1ec7u \u0111\u00fac v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ea1n \u0111ang nh\u1eafm \u0111\u1ebfn.<\/p>\n<h2 id=\"key-aspect-2-pattern-quality\">Kh\u00eda c\u1ea1nh ch\u00ednh 2: Ch\u1ea5t l\u01b0\u1ee3ng m\u00f4 h\u00ecnh<\/h2>\n<h3 id=\"foam-pattern-quality-requirements\">Y\u00eau c\u1ea7u ch\u1ea5t l\u01b0\u1ee3ng m\u1eabu b\u1ecdt<\/h3>\n<h4 id=\"dimensional-accuracy\">\u0110\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc<\/h4>\n<p>M\u00f4 h\u00ecnh ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi k\u1ebf ho\u1ea1ch thi\u1ebft k\u1ebf ch\u00ednh x\u00e1c, kh\u00f4ng u\u1ed1n cong ho\u1eb7c thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng trong khi \u0111\u01b0\u1ee3c di chuy\u1ec3n ho\u1eb7c l\u00e0m vi\u1ec7c.<\/p>\n<h4 id=\"surface-finish\">B\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n<\/h4>\n<p>M\u1ed9t b\u1ec1 m\u1eb7t \u0111\u1eb9p, ngay c\u1ea3 v\u1edbi h\u1ea1t g\u1eafn ch\u1eb7t ch\u1ebd l\u00e0 m\u1ed9t \u0111i\u1ec1u c\u1ea7n thi\u1ebft. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ea1o ra m\u1ed9t kh\u00f4ng gian khu\u00f4n m\u1ecbn, d\u1eabn \u0111\u1ebfn c\u00e1c b\u1ec1 m\u1eb7t \u0111\u00fac tr\u00f4ng \u0111\u1eb9p h\u01a1n.<\/p>\n<h4 id=\"structural-integrity\">T\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac<\/h4>\n<p>M\u00f4 h\u00ecnh c\u1ea7n ph\u1ea3i c\u1ee9ng v\u00e0 \u0111\u1ee7 v\u1eefng ch\u1eafc \u0111\u1ec3 x\u1eed l\u00fd d\u00e1n, ph\u1ee7, s\u1ea5y, di chuy\u1ec3n, \u0111\u00f3ng g\u00f3i c\u00e1t v\u00e0 \u0111\u00f3ng h\u1ed9p m\u00e0 kh\u00f4ng b\u1ecb ph\u00e1 v\u1ee1 ho\u1eb7c m\u1ea5t h\u00ecnh d\u1ea1ng.<\/p>\n<h2 id=\"pattern-manufacturing-process\">Qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t m\u1eabu<\/h2>\n<h3 id=\"bead-pre-foaming\">H\u1ea1t tr\u01b0\u1edbc b\u1ecdt<\/h3>\n<h4 id=\"pre-expansion-parameters\">C\u00e1c th\u00f4ng s\u1ed1 tr\u01b0\u1edbc m\u1edf r\u1ed9ng<\/h4>\n<p>EPS c\u1ea7n nhi\u1ec7t tr\u01b0\u1edbc khi m\u1edf r\u1ed9ng l\u00e0 100-105 \u00b0 C. STMMA ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t \u1edf 105-115 \u00b0 C, trong khi EPMMA y\u00eau c\u1ea7u 120-130 \u00b0 C. B\u1ea1n ph\u1ea3i theo d\u00f5i ch\u1ea3y h\u01a1i n\u01b0\u1edbc ch\u1eb7t ch\u1ebd \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u01b0ng kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u ho\u1eb7c v\u1ee1 c\u00e1c h\u1ea1t.<\/p>\n<h4 id=\"aging-of-pre-expanded-beads\">L\u01b0u h\u00f3a c\u1ee7a h\u1ea1t m\u1edf r\u1ed9ng tr\u01b0\u1edbc<\/h4>\n<p>Sau khi m\u1edf r\u1ed9ng tr\u01b0\u1edbc, h\u1ea1t gi\u1eef l\u00ean \u0111\u1ebfn 10% tr\u1ecdng l\u01b0\u1ee3ng n\u01b0\u1edbc. Ch\u00fang c\u1ea7n s\u1ea5y cho \u0111\u1ebfn khi n\u01b0\u1edbc gi\u1ea3m d\u01b0\u1edbi 2% tr\u01b0\u1edbc khi t\u1ea1o h\u00ecnh. L\u01b0u h\u00f3a gi\u00fap c\u00e2n b\u1eb1ng \u00e1p l\u1ef1c b\u00ean trong h\u1ea1t.<\/p>\n<h3 id=\"forming\">H\u00ecnh th\u00e0nh<\/h3>\n<p>&nbsp;<\/p>\n<div style=\"text-align: center;\"><img decoding=\"async\" src=\"http:\/\/www.oc-epc.com\/wp-content\/uploads\/2025\/09\/Lost-foam-casting-pattern-forming-machine-1.webp\" alt=\"M\u00e1y t\u1ea1o m\u1eabu \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t\" \/><\/div>\n<h3 id=\"molding-pressure-and-temperature-control\">Ki\u1ec3m so\u00e1t \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u0111\u00fac<\/h3>\n<p>H\u01a1i n\u01b0\u1edbc \u1edf 0,1-0,15 MPa \u0111\u01b0\u1ee3c b\u01a1m v\u00e0o khu\u00f4n \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng \u0111\u1ebfn kho\u1ea3ng 100 \u00b0 C. Sau \u0111\u00f3, d\u00f2ng ch\u1ea3y h\u01a1i n\u01b0\u1edbc ng\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o m\u1ecdi th\u1ee9 n\u00f3ng l\u00ean \u0111\u1ec1u \u0111\u1eb7n. L\u00e0m m\u00e1t l\u00e0m gi\u1ea3m nhi\u1ec7t khu\u00f4n xu\u1ed1ng 40-50 \u00b0 C tr\u01b0\u1edbc khi l\u1ea5y m\u1ea3nh ra.<\/p>\n<h3 id=\"bonding-assembly\">Li\u00ean k\u1ebft &amp; L\u1eafp r\u00e1p<\/h3>\n<h4 id=\"adhesive-selection-and-application-techniques\">K\u1ef9 thu\u1eadt l\u1ef1a ch\u1ecdn v\u00e0 \u1ee9ng d\u1ee5ng ch\u1ea5t d\u00ednh<\/h4>\n<p>Keo \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft d\u00ednh ph\u1ea3i bi\u1ebfn m\u1ea5t ho\u00e0n to\u00e0n m\u00e0 kh\u00f4ng \u0111\u1ec3 l\u1ea1i b\u1ea5t k\u1ef3 s\u1ef1 l\u1ed9n x\u1ed9n n\u00e0o ph\u00eda sau. Qu\u00e1 nhi\u1ec1u keo c\u00f3 th\u1ec3 g\u00e2y r\u1eafc r\u1ed1i, v\u00ec n\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng bi\u1ebfn m\u1ea5t ho\u00e0n to\u00e0n v\u00e0 c\u00f3 th\u1ec3 t\u1ea1o ra l\u1ed7i trong m\u1ea3nh cu\u1ed1i c\u00f9ng.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c m\u1eabu kh\u00f3 kh\u0103n \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb m\u1ed9t s\u1ed1 b\u1ed9 ph\u1eadn, li\u1ec1n ch\u00fang ngay trong khi d\u00e1n gi\u1eef k\u00edch th\u01b0\u1edbc \u1ed5n \u0111\u1ecbnh tr\u00ean to\u00e0n b\u1ed9 m\u00f4 h\u00ecnh.<\/p>\n<h2 id=\"pattern-aging-and-stabilization\">M\u00f4 h\u00ecnh l\u00e3o h\u00f3a v\u00e0 \u1ed5n \u0111\u1ecbnh<\/h2>\n<h3 id=\"drying-of-foam-patterns\">S\u1ea5y c\u00e1c m\u1eabu b\u1ecdt<\/h3>\n<h4 id=\"moisture-content-control\">Ki\u1ec3m so\u00e1t h\u00e0m l\u01b0\u1ee3ng \u1ea9m<\/h4>\n<p>C\u00e1c m\u1eabu m\u1edbi c\u00f3 h\u00ecnh d\u1ea1ng c\u00f3 th\u1ec3 c\u00f3 \u0111\u1ed9 \u1ea9m 6% -8%. Ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c kh\u00f4 cho \u0111\u1ebfn khi n\u00f3 d\u01b0\u1edbi 1% tr\u01b0\u1edbc khi th\u00eam b\u1ea5t k\u1ef3 l\u1edbp ph\u1ee7 n\u00e0o.<\/p>\n<h3 id=\"curing-of-foam-patterns\">Ch\u1eefa l\u00e0nh c\u00e1c m\u1eabu b\u1ecdt<\/h3>\n<h4 id=\"time-and-temperature-considerations\">Th\u1eddi gian v\u00e0 nhi\u1ec7t \u0111\u1ed9<\/h4>\n<p>C\u00e1c m\u1eabu EPS c\u1ea7n ph\u1ea3i c\u1ee9ng \u00e9p \u1edf 45-60 \u00b0 C trong 4-6 ng\u00e0y. STMMA v\u00e0 EPMMA m\u1ea5t kho\u1ea3ng 5-7 ng\u00e0y, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u00e0y c\u1ee7a ch\u00fang v\u00e0 \u0111\u1ed9 \u1ea9m c\u1ee7a ch\u00fang.<\/p>\n<p>\u0110\u1ec3 ch\u00fang kh\u00f4 m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o th\u1eddi ti\u1ebft. V\u00ec v\u1eady, s\u1eed d\u1ee5ng ph\u00f2ng s\u1ea5y v\u1edbi h\u1ec7 th\u1ed1ng \u0111\u1ec3 lo\u1ea1i b\u1ecf \u0111\u1ed9 \u1ea9m l\u00e0 m\u1ed9t c\u01b0\u1ee3c t\u1ed1t h\u01a1n cho k\u1ebft qu\u1ea3 \u1ed5n \u0111\u1ecbnh.<\/p>\n<h2 id=\"coating-application-and-drying\">\u1ee8ng d\u1ee5ng l\u1edbp ph\u1ee7 v\u00e0 s\u1ea5y<\/h2>\n<h3 id=\"refractory-coatings\">L\u1edbp ph\u1ee7 ch\u1ecbu l\u1eeda<\/h3>\n<h4 id=\"types-of-coatings-used-in-lost-foam-casting\">Lo\u1ea1i l\u1edbp ph\u1ee7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t<\/h4>\n<p>L\u1edbp ph\u1ee7 th\u01b0\u1eddng l\u00e0 h\u1ed7n h\u1ee3p d\u1ef1a tr\u00ean r\u01b0\u1ee3u ho\u1eb7c d\u1ef1a tr\u00ean n\u01b0\u1edbc \u0111\u01b0\u1ee3c l\u00e0m \u0111\u1ec3 x\u1eed l\u00fd nhi\u1ec7t kim lo\u1ea1i cao trong khi v\u1eabn \u0111\u1ec3 cho kh\u00ed tr\u01b0\u1ee3t ra.<\/p>\n<h3 id=\"curing-methods-best-practices\">Ph\u01b0\u01a1ng ph\u00e1p ch\u1eefa b\u1ec7nh &amp; Th\u1ef1c ti\u1ec5n t\u1ed1t nh\u1ea5t<\/h3>\n<h4 id=\"air-drying-vs.-oven-drying-techniques\">S\u1ea5y kh\u00f4ng kh\u00ed vs. K\u1ef9 thu\u1eadt s\u1ea5y l\u00f2<\/h4>\n<p>C\u00e1c l\u1edbp ph\u1ee7 d\u1ef1a tr\u00ean r\u01b0\u1ee3u c\u00f3 th\u1ec3 kh\u00f4 trong kh\u00f4ng kh\u00ed trong v\u00f2ng 30-60 ph\u00fat. Nh\u1eefng th\u1ee9 d\u1ef1a tr\u00ean n\u01b0\u1edbc c\u00f3 th\u1ec3 m\u1ea5t t\u1edbi 12 gi\u1edd tr\u1eeb khi b\u1ea1n t\u0103ng t\u1ed1c m\u1ecdi th\u1ee9 v\u1edbi l\u00f2 \u1edf 50-60 \u00b0 C v\u00e0 d\u00f2ng kh\u00f4ng kh\u00ed t\u1ed1t.<\/p>\n<p>\u0110\u1eb7t ch\u00fang \u0111\u00fang c\u00e1ch trong khi s\u1ea5y ng\u0103n ch\u1eb7n b\u1ea5t k\u1ef3 u\u1ed1n cong n\u00e0o. Sau khi s\u1ea5y, l\u01b0u tr\u1eef ch\u00fang \u1edf m\u1ed9t n\u01a1i kh\u00f4 \u0111\u1ec3 gi\u1eef cho \u0111\u1ed9 \u1ea9m kh\u00f4ng l\u1ea9n v\u00e0o.<\/p>\n<h2 id=\"casting-defects-their-causes\">L\u1ed7i \u0111\u00fac &amp; Nguy\u00ean nh\u00e2n c\u1ee7a h\u1ecd<\/h2>\n<h3 id=\"impact-of-thermal-decomposition-on-casting-quality\">T\u00e1c \u0111\u1ed9ng c\u1ee7a s\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t \u0111\u1ed1i v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00fac<\/h3>\n<p>Khi b\u1ecdt ph\u00e1 v\u1ee1, n\u00f3 th\u1ea3i ra c\u00e1c kh\u00ed c\u1ea7n tho\u00e1t qua l\u1edbp ph\u1ee7 trong khi \u0111\u1ed5 kim lo\u1ea1i.<\/p>\n<h4 id=\"gas-generation-and-entrapment-issues\">C\u00e1c v\u1ea5n \u0111\u1ec1 s\u1ea3n xu\u1ea5t kh\u00ed v\u00e0 b\u1eaby<\/h4>\n<p>N\u1ebfu l\u1edbp ph\u1ee7 kh\u00f4ng \u0111\u1ec3 \u0111\u1ee7 kh\u00ed ra ho\u1eb7c n\u1ebfu qu\u00e1 nhi\u1ec1u kh\u00ed t\u00edch t\u1ee5, n\u00f3 b\u1ecb m\u1eafc k\u1eb9t. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c l\u1ed7 nh\u1ecf ho\u1eb7c c\u00e1c v\u1ebft n\u1ee9t th\u00f4 tr\u00ean m\u1ea3nh cu\u1ed1i c\u00f9ng.<\/p>\n<h4 id=\"carbon-residue-formation\">X\u00e2y d\u1ef1ng d\u01b0 l\u01b0\u1ee3ng carbon<\/h4>\n<p>N\u1ebfu b\u1ecdt kh\u00f4ng ph\u00e1 h\u1ee7y ho\u00e0n to\u00e0n ho\u1eb7c n\u1ebfu \u0111\u1ed5 v\u00e0 lo\u1ea1i b\u1ecf kh\u00ed kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00fang th\u1eddi gian, c\u00e1c bit carbon c\u00f2n l\u1ea1i c\u00f3 th\u1ec3 k\u1ebft th\u00fac b\u00ean trong \u0111\u00fac.<\/p>\n<h2 id=\"process-optimization\">T\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh<\/h2>\n<p>\u0110\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y t\u1eebng b\u01b0\u1edbc:<\/p>\n<ul>\n<li>Ch\u1ecdn c\u00e1c lo\u1ea1i h\u1ea1t d\u1ef1a tr\u00ean nhu c\u1ea7u c\u1ee7a h\u1ee3p kim (nh\u01b0 s\u1eed d\u1ee5ng STMMA cho s\u1eaft ductile).<\/li>\n<li>C\u1eb7p k\u00edch th\u01b0\u1edbc h\u1ea1t v\u1edbi \u0111\u1ed9 d\u00e0y t\u01b0\u1eddng (tu\u00e2n theo quy t\u1eafc &lt; 1\/10).<\/li>\n<li>S\u1eed d\u1ee5ng pre-foaming c\u1ea9n th\u1eadn v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t h\u01a1i n\u01b0\u1edbc theo d\u00f5i.<\/li>\n<li>H\u00e3y \u0111\u1ea3m b\u1ea3o th\u1eddi gian l\u00e3o h\u00f3a v\u00e0 kh\u00f4 ph\u00f9 h\u1ee3p v\u1edbi m\u00f9a.<\/li>\n<li>Gi\u1eef keo s\u1eed d\u1ee5ng t\u1ed1i thi\u1ec3u khi li\u00ean k\u1ebft.<\/li>\n<li>Tr\u00e0n l\u1edbp ph\u1ee7 \u0111\u1ec1u b\u1eb1ng m\u00e1y tr\u1ed9n t\u1ef1 \u0111\u1ed9ng nh\u01b0 m\u00e1y tr\u1ed9n s\u01a1n lo\u1ea1i thang m\u00e1y c\u00f3 b\u1ed9 ph\u00e2n t\u00e1n v\u00e0 b\u1ec3 di chuy\u1ec3n.<\/li>\n<li>S\u1eed d\u1ee5ng c\u00e1c h\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3 ch\u00e2n kh\u00f4ng, ch\u1eb3ng h\u1ea1n nh\u01b0 h\u1ec7 th\u1ed1ng ch\u00e2n kh\u00f4ng trung t\u00e2m c\u1ee7a Hangzhou Ouchen Technology, gi\u1eef \u00e1p su\u1ea5t ti\u00eau c\u1ef1c \u1edf -0,5MPa \u0111\u1ebfn -0,8MPa \u0111\u1ec3 l\u00e0m m\u00e1t nhanh ch\u00f3ng v\u1edbi \u00edt thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng.<\/li>\n<\/ul>\n<h2 id=\"faq\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p><strong>Q: T\u1ea1i sao s\u1ef1 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u b\u1ecdt quan tr\u1ecdng?<\/strong><br \/>\nA: B\u1ecdt kh\u00e1c nhau ph\u00e1 h\u1ee7y theo c\u00e1ch \u0111\u1ed9c \u0111\u00e1o d\u01b0\u1edbi nhi\u1ec7t. Ch\u1ecdn sai c\u00f3 th\u1ec3 c\u00f3 ngh\u0129a l\u00e0 nhi\u1ec1u kh\u00ed ho\u1eb7c carbon c\u00f2n l\u1ea1i, l\u00e0m l\u1ed9n x\u1ed9n ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00fac.<\/p>\n<p><strong>Q: S\u1ea5y m\u1eabu quan tr\u1ecdng nh\u01b0 th\u1ebf n\u00e0o?<\/strong><br \/>\nA: Si\u00eau quan tr\u1ecdng - \u0111\u1ed9 \u1ea9m c\u00f3 th\u1ec3 g\u00e2y r\u1ed1i v\u1edbi s\u1ef1 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00ednh l\u1edbp ph\u1ee7 t\u1ed1t nh\u01b0 th\u1ebf n\u00e0o. C\u00e1c m\u1eabu n\u00ean c\u00f3 \u0111\u1ed9 \u1ea9m d\u01b0\u1edbi 1% tr\u01b0\u1edbc khi l\u1edbp ph\u1ee7.<\/p>\n<p><strong>Q: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c t\u1ea5m b\u1ecdt l\u1edbp x\u00e2y d\u1ef1ng kh\u00f4ng?<\/strong><br \/>\nA: Kh\u00f4ng. B\u1ecdt x\u00e2y d\u1ef1ng th\u01b0\u1eddng c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t v\u00e0 s\u1ee9c m\u1ea1nh sai, g\u00e2y ra c\u00e1c bit b\u1ecb m\u1eafc k\u1eb9t khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng c\u1eeda.<\/p>\n<p><strong>Q: C\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 kh\u00f4 l\u1edbp ph\u1ee7 nhanh ch\u00f3ng l\u00e0 g\u00ec?<\/strong><br \/>\nA: Th\u1eed ph\u00f2ng s\u1ea5y n\u00f3ng \u1edf kho\u1ea3ng 60 \u00b0 C v\u1edbi m\u00e1y kh\u1eed \u1ea9m cho l\u1edbp ph\u1ee7 d\u1ef1a tr\u00ean n\u01b0\u1edbc. Ho\u1eb7c, n\u1ebfu tr\u1eddi n\u1eafng, h\u00e3y \u0111\u1ec3 c\u00e1c lo\u1ea1i r\u01b0\u1ee3u kh\u00f4 b\u00ean ngo\u00e0i n\u1ebfu th\u1eddi ti\u1ebft ph\u00f9 h\u1ee3p.<\/p>\n<h2 id=\"hangzhou-ouchen-technology-co.-ltd-lost-foam-casting-white-area-equipment-manufacturer\">Hangzhou Ouchen Technology Co., LTD m\u1ea5t b\u1ecdt \u0111\u00fac tr\u1eafng khu v\u1ef1c thi\u1ebft b\u1ecb nh\u00e0 s\u1ea3n xu\u1ea5t<\/h2>\n<p><a style=\"text-decoration: underline;\" href=\"https:\/\/www.oc-epc.com\/vi\/\"><strong>C\u00f4ng ty TNHH C\u00f4ng ngh\u1ec7 H\u00e0ng Ch\u00e2u Ouchen<\/strong><\/a> t\u1eadp trung v\u00e0o l\u00e0m <a style=\"text-decoration: underline;\" href=\"https:\/\/www.oc-epc.com\/vi\/cac-san-pham\/\"><strong>thi\u1ebft b\u1ecb th\u00f4ng minh cho c\u00e1c khu v\u1ef1c \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t tr\u1eafng<\/strong><\/a>. D\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd bao g\u1ed3m m\u00e1y t\u1ea1o b\u1ecdt ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng v\u1edbi thi\u1ebft l\u1eadp lai \u0111i\u1ec7n t\u1eeb-h\u01a1i n\u01b0\u1edbc, silo l\u01b0u tr\u1eef v\u1edbi \u0111i\u1ec1u khi\u1ec3n kh\u00ed h\u1eadu th\u00f4ng minh, m\u00e1y t\u1ea1o h\u00ecnh d\u1ecdc v\u00e0 ngang v\u1edbi t\u1ef1 \u0111\u1ed9ng h\u00f3a PLC, h\u1ec7 th\u1ed1ng ch\u00e2n kh\u00f4ng trung t\u00e2m \u0111\u1ec3 l\u00e0m m\u00e1t nhanh ch\u00f3ng v\u00e0 m\u00e1y tr\u1ed9n s\u01a1n h\u00e0ng \u0111\u1ea7u cho s\u1ef1 lan r\u1ed9ng l\u1edbp ph\u1ee7.<\/p>\n<p>V\u1edbi c\u00e1c t\u00ednh n\u0103ng tuy\u1ec7t v\u1eddi nh\u01b0 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1 t\u1eeb xa, c\u00e0i \u0111\u1eb7t \u00e1p su\u1ea5t c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh, h\u1ec7 th\u1ed1ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 trao \u0111\u1ed5i khu\u00f4n nhanh ch\u00f3ng gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng t\u1eeb gi\u1edd \u0111\u1ebfn ph\u00fat, h\u1ecd \u0111ang thay \u0111\u1ed5i tr\u00f2 ch\u01a1i cho s\u1ea3n xu\u1ea5t b\u1ecdt b\u1ecb m\u1ea5t. H\u1ecd l\u00e0 \u0111\u1ed1i t\u00e1c c\u1ea7n thi\u1ebft cho c\u00e1c nh\u00e0 m\u00e1y \u0111\u00fac hi\u1ec7n \u0111\u1ea1i t\u00ecm ki\u1ebfm \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady. <a style=\"text-decoration: underline;\" href=\"https:\/\/www.oc-epc.com\/vi\/lien-he\/\"><strong>Li\u00ean h\u1ec7 Ouchen<\/strong><\/a> h\u00f4m nay cung c\u1ea5p thi\u1ebft b\u1ecb t\u1ed1t nh\u1ea5t.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110\u00fac b\u1ecdt b\u1ecb m\u1ea5t l\u00e0 m\u1ed9t c\u00e1ch hi\u1ec7n \u0111\u1ea1i \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh kim lo\u1ea1i v\u1edbi m\u1ed9t s\u1ed1 l\u1ee3i \u00edch tuy\u1ec7t v\u1eddi, nh\u01b0 k\u00edch th\u01b0\u1edbc si\u00eau ch\u00ednh x\u00e1c, \u00edt c\u1ea7n c\u1eaft th\u00eam v\u00e0 t\u1ef1 do thi\u1ebft k\u1ebf h\u00ecnh d\u1ea1ng \u0111\u1ed9c \u0111\u00e1o. Nh\u01b0ng nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 h\u00e0ng \u0111\u1ea7u m\u1ed7i l\u1ea7n c\u00f3 ngh\u0129a l\u00e0 gi\u1ea3i quy\u1ebft hai tr\u1edf ng\u1ea1i l\u1edbn: ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c m\u1eabu ho\u00e0n h\u1ea3o. Hai \u0111i\u1ec1u n\u00e0y [&hellip;]<\/p>","protected":false},"author":3,"featured_media":4569,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[160],"tags":[],"class_list":["post-4573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"jetpack_publicize_connections":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts\/4573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/comments?post=4573"}],"version-history":[{"count":1,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts\/4573\/revisions"}],"predecessor-version":[{"id":4574,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts\/4573\/revisions\/4574"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/media\/4569"}],"wp:attachment":[{"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/media?parent=4573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/categories?post=4573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/tags?post=4573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}