{"id":4360,"date":"2025-06-12T11:50:10","date_gmt":"2025-06-12T03:50:10","guid":{"rendered":"https:\/\/www.oc-epc.com\/?p=4360"},"modified":"2025-06-10T17:24:19","modified_gmt":"2025-06-10T09:24:19","slug":"khuyet-tat-duc-bot-bi-mat-pho-bien-va-nguyen-nhan-cua-chung","status":"publish","type":"post","link":"https:\/\/www.oc-epc.com\/vi\/news-blog\/industry-news\/common-lost-foam-casting-defects-and-their-causes\/","title":{"rendered":"C\u00e1c khuy\u1ebft t\u1eadt \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t ph\u1ed5 bi\u1ebfn v\u00e0 nguy\u00ean nh\u00e2n c\u1ee7a ch\u00fang"},"content":{"rendered":"

L\u1ed7i \u0111\u00fac n\u1ebfp nh\u0103n<\/b><\/strong>\u00a0trong Lost Form Casting <\/b><\/strong><\/h2>\n

\"L\u1ed7i<\/p>\n

Nguy\u00ean nh\u00e2n c\u1ee7a khuy\u1ebft t\u1eadt \u0111\u00fac n\u1ebfp nh\u0103n<\/b><\/strong><\/h3>\n

L\u1ed7i \u0111\u00fac n\u1ebfp nh\u0103n ph\u00e1t sinh khi b\u1ecdt polystyrene tr\u1ea3i qua nhi\u1ec7t ph\u00e2n do ti\u1ebfp x\u00fac v\u1edbi kim lo\u1ea1i n\u00f3ng ch\u1ea3y nhi\u1ec7t \u0111\u1ed9 cao. Qu\u00e1 tr\u00ecnh n\u00e0y t\u1ea1o ra m\u1ed9t l\u01b0\u1ee3ng carbon \u0111\u00e1ng k\u1ec3, t\u00edch l\u0169y tr\u00ean khoang’ s b\u1ec1 m\u1eb7t b\u00ean ngo\u00e0i. Nh\u1eefng khuy\u1ebft t\u1eadt n\u00e0y th\u01b0\u1eddng x\u1ea3y ra \u1edf c\u00e1c \u0111\u1ea7u l\u1ea1nh h\u01a1n c\u1ee7a d\u00f2ng ch\u1ea3y kim lo\u1ea1i l\u1ecfng ho\u1eb7c n\u01a1i d\u00f2ng ch\u1ea3y b\u1ecb gi\u00e1n \u0111o\u1ea1n, ch\u1eb3ng h\u1ea1n nh\u01b0 \u1edf \u0111\u1ec9nh c\u00e1c qu\u1ea3 b\u00f3ng m\u00e0i.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i quy\u1ebft khuy\u1ebft t\u1eadt \u0111\u00fac n\u1ebfp nh\u0103n<\/b><\/strong><\/h3>\n

S\u1eed d\u1ee5ng b\u1ecdt EPS m\u1eadt \u0111\u1ed9 th\u1ea5p<\/b><\/strong><\/h4>\n

Ch\u1ecdn b\u1ecdt EPS m\u1eadt \u0111\u1ed9 th\u1ea5p \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho \u0111\u00fac c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u c\u00e1c khuy\u1ebft t\u1eadt n\u1ebfp nh\u0103n. V\u1eadt li\u1ec7u n\u00e0y kh\u00ed h\u00f3a nhanh ch\u00f3ng v\u00e0 \u0111\u1ec3 l\u1ea1i d\u01b0 l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u, l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng h\u00ecnh th\u00e0nh n\u1ebfp nh\u0103n.<\/p>\n

\u0110i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 v\u00e0 t\u1ed1c \u0111\u1ed9 \u0111\u1ed5<\/b><\/strong><\/h4>\n

T\u0103ng nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed5 50% -80% t\u0103ng t\u1ed1c kh\u00ed h\u00f3a, trong khi t\u1ed1c \u0111\u1ed9 \u0111\u1ed5 cao h\u01a1n l\u00e0m gi\u1ea3m m\u1ea5t nhi\u1ec7t. Nh\u1eefng \u0111i\u1ec1u ch\u1ec9nh n\u00e0y c\u1ea3i thi\u1ec7n c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00e0 b\u1ecdt ph\u00e2n h\u1ee7y, gi\u1ea3m thi\u1ec3u s\u1ef1 h\u00ecnh th\u00e0nh khuy\u1ebft t\u1eadt.<\/p>\n

C\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng th\u1ea5m ch\u00e2n kh\u00f4ng v\u00e0 khu\u00f4n<\/b><\/strong><\/h4>\n

N\u00e2ng cao m\u1ee9c ch\u00e2n kh\u00f4ng gi\u00fap lo\u1ea1i b\u1ecf kh\u00ed th\u1ea3i v\u00e0 kh\u00f3i, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n kh\u00ed h\u00f3a t\u1ed1t h\u01a1n. Ngo\u00e0i ra, s\u1eed d\u1ee5ng c\u00e1t th\u00f4 v\u00e0 l\u1edbp ph\u1ee7 c\u00f3 \u0111\u1ed9 th\u1ea5m kh\u00f4ng kh\u00ed cao h\u01a1n th\u00fac \u0111\u1ea9y tho\u00e1t hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m ph\u00e2n h\u1ee7y.<\/p>\n

L\u1ed7i \u0111\u00fac carbon \u0111en<\/b><\/strong>\u00a0trong Lost Form Casting<\/b><\/strong><\/h2>\n

\"L\u1ed7i<\/p>\n

C\u00e1c y\u1ebfu t\u1ed1 d\u1eabn \u0111\u1ebfn khuy\u1ebft t\u1eadt \u0111\u00fac carbon \u0111en<\/b><\/strong><\/h3>\n

C\u00e1c khuy\u1ebft t\u1eadt carbon \u0111en ch\u1ee7 y\u1ebfu l\u00e0 do h\u00e0m l\u01b0\u1ee3ng carbon qu\u00e1 m\u1ee9c trong s\u1eaft \u0111\u00fac nodular. Khi t\u1ef7 l\u1ec7 carbon trong c\u00e1c qu\u1ea3 b\u00f3ng m\u00e0i dao \u0111\u1ed9ng t\u1eeb 3,3% \u0111\u1ebfn 3,8%, nh\u1eefng khi\u1ebfm khuy\u1ebft n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng x\u1ea3y ra nhi\u1ec1u h\u01a1n.<\/p>\n

K\u1ef9 thu\u1eadt ng\u0103n ng\u1eeba khuy\u1ebft t\u1eadt \u0111\u00fac carbon \u0111en<\/b><\/strong><\/h3>\n

Ch\u1ecdn l\u1edbp ph\u1ee7 c\u00f3 kh\u1ea3 n\u0103ng \u01b0\u1edbt t\u1ed1t<\/b><\/strong><\/h4>\n

S\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 c\u00f3 kh\u1ea3 n\u0103ng \u01b0\u1edbt \u01b0\u1edbt v\u00e0 \u0111\u1ed9 th\u1ea5m kh\u00f4ng kh\u00ed tuy\u1ec7t v\u1eddi \u0111\u1ea3m b\u1ea3o c\u00e1c quy tr\u00ecnh \u0111\u1ed5 m\u01b0\u1ee3t m\u00e0 h\u01a1n v\u00e0 gi\u1ea3m s\u1ef1 h\u00ecnh th\u00e0nh l\u1ed7i.<\/p>\n

S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u EPMMA<\/b><\/strong><\/h4>\n

H\u1ea1t nh\u1ef1a polymethylmethacrylate m\u1edf r\u1ed9ng (EPMMA) c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c gi\u1ea3i quy\u1ebft c\u00e1c khuy\u1ebft t\u1eadt carbon \u0111en. C\u00e1c v\u1eadt li\u1ec7u n\u00e0y t\u0103ng c\u01b0\u1eddng qu\u00e1 tr\u00ecnh \u0111\u00fac b\u1eb1ng c\u00e1ch h\u1ea1n ch\u1ebf d\u01b0 l\u01b0\u1ee3ng carbon.<\/p>\n

Ki\u1ec3m so\u00e1t S\u1ed1 l\u01b0\u1ee3ng Binder<\/b><\/strong><\/h4>\n

\u0110i\u1ec1u ch\u1ec9nh ch\u1eb7t ch\u1ebd l\u01b0\u1ee3ng ch\u1ea5t k\u1ebft h\u1ee3p m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t gi\u1ea3m thi\u1ec3u vi\u1ec7c t\u1ea1o ra kh\u00ed trong qu\u00e1 tr\u00ecnh nhi\u1ec7t ph\u00e2n, do \u0111\u00f3 ng\u0103n ch\u1eb7n s\u1ef1 h\u00ecnh th\u00e0nh carbon \u0111en.<\/p>\n

N\u00e2ng cao quy tr\u00ecnh khai th\u00e1c kh\u00f4ng kh\u00ed<\/b><\/strong><\/h4>\n

T\u0103ng khai th\u00e1c kh\u00f4ng kh\u00ed trong khi \u0111\u1ed5 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c kh\u00ed t\u1ea1o ra b\u1edfi s\u1ef1 ph\u00e2n h\u1ee7y b\u1ecdt \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf hi\u1ec7u qu\u1ea3, gi\u1ea3m nguy c\u01a1 l\u1ed7i.<\/p>\n

L\u1ed7i bao g\u1ed3m v\u00e0 Slag Inclusion<\/b><\/strong>\u00a0trong Lost Form Casting <\/b><\/strong><\/h2>\n

L\u00fd do \u0111\u1eb1ng sau l\u1ed7i bao g\u1ed3m v\u00e0 l\u1ed7i bao g\u1ed3m Slag<\/b><\/strong><\/h3>\n

M\u1ee9c magi\u00ea c\u00f2n l\u1ea1i cao<\/b><\/strong><\/h4>\n

Magnesi d\u01b0 th\u1eeba trong s\u1eaft \u0111\u00fac h\u1ea1t l\u00e0m t\u0103ng m\u00e0ng oxyt ’ nhi\u1ec7t \u0111\u1ed9 h\u00ecnh th\u00e0nh s. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn oxy h\u00f3a th\u1ee9 c\u1ea5p trong khi \u0111\u1ed5, d\u1eabn \u0111\u1ebfn vi\u1ec7c bao g\u1ed3m n\u1ee9t.<\/p>\n

H\u00e0m l\u01b0\u1ee3ng l\u01b0u hu\u1ef3nh cao trong v\u1eadt li\u1ec7u<\/b><\/strong><\/h4>\n

N\u1ed3ng \u0111\u1ed9 l\u01b0u hu\u1ef3nh cao t\u1ea1o ra sulfua nh\u01b0 MgS v\u00e0 CeS4, g\u00f3p ph\u1ea7n v\u00e0o vi\u1ec7c bao g\u1ed3m trong \u0111\u00fac.<\/p>\n

Nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed5 th\u1ea5p<\/b><\/strong><\/h4>\n

\u0110\u1ed5 \u1edf nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ee7 ng\u0103n ch\u1eb7n s\u1ef1 bao g\u1ed3m n\u1ea5m tr\u1ed9m n\u1ed5i l\u00ean b\u1ec1 m\u1eb7t \u0111\u1ec3 lo\u1ea1i b\u1ecf.<\/p>\n

Chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u s\u1ef1 bao g\u1ed3m v\u00e0 c\u00e1c khuy\u1ebft t\u1eadt bao g\u1ed3m Slag<\/b><\/strong><\/h3>\n

Duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed5 tr\u00ean 1300 \u2103<\/b><\/strong><\/h4>\n

\u0110\u1ea3m b\u1ea3o nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed5 tr\u00ean 1300 \u2103 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n t\u00edch l\u0169y v\u00e0 lo\u1ea1i b\u1ecf c\u00e1c ch\u1ea5t bao g\u1ed3m t\u1ed1t h\u01a1n trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd.<\/p>\n

Gi\u1ea3m h\u00e0m l\u01b0\u1ee3ng magi\u00ea v\u00e0 l\u01b0u hu\u1ef3nh c\u00f2n l\u1ea1i<\/b><\/strong><\/h4>\n

Gi\u1ea3m thi\u1ec3u n\u1ed3ng \u0111\u1ed9 magi\u00ea c\u00f2n l\u1ea1i trong khi duy tr\u00ec s\u1ef1 h\u00ecnh c\u1ea7u \u0111\u1ea7y \u0111\u1ee7 l\u00e0m gi\u1ea3m r\u1ee7i ro bao g\u1ed3m n\u1ee9t. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, gi\u1ea3m h\u00e0m l\u01b0\u1ee3ng l\u01b0u hu\u1ef3nh trong s\u1eaft n\u00f3ng ch\u1ea3y th\u00f4 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00fac.<\/p>\n

S\u1eed d\u1ee5ng h\u1ee3p kim magi\u00ea \u0111\u1ea5t hi\u1ebfm<\/b><\/strong><\/h4>\n

S\u1eed d\u1ee5ng h\u1ee3p kim magi\u00ea \u0111\u1ea5t hi\u1ebfm l\u00e0m ch\u1ea5t l\u00e0m h\u00ecnh c\u1ea7u l\u00e0m gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 k\u1ebft m\u1ea1ch m\u00e0ng oxyt, l\u00e0m gi\u1ea3m nguy c\u01a1 h\u00ecnh th\u00e0nh n\u1ee9t.<\/p>\n

Th\u00eam m\u00e0n h\u00ecnh l\u1ecdc v\u00e0 t\u00fai thu th\u1eadp Slag<\/b><\/strong><\/h4>\n

K\u1ebft h\u1ee3p m\u00e0n h\u00ecnh l\u1ecdc v\u00e0 t\u00fai thu th\u1eadp n\u1ee9t th\u1ea1ch v\u00e0o sprues t\u0103ng c\u01b0\u1eddng s\u1ef1 t\u00e1ch n\u1ee9t th\u1ea1ch trong khi \u0111\u1ed5, \u0111\u1ea3m b\u1ea3o \u0111\u00fac ch\u1ea5t l\u01b0\u1ee3ng cao h\u01a1n.<\/p>\n

Kho\u00e1ng l\u1ed7 \u0111\u00fac khuy\u1ebft t\u1eadt<\/b><\/strong>\u00a0trong Lost Form Casting <\/b><\/strong><\/h2>\n

Nguy\u00ean nh\u00e2n r\u1ec5 r\u1ec5 c\u1ee7a \u0111\u1ed9 x\u1ed1p trong \u0111\u00fac<\/b><\/strong><\/h3>\n

Kh\u00ed t\u1eeb nhi\u1ec7t ph\u00e2n b\u1ecdt kh\u00f4ng th\u1ec3 tho\u00e1t<\/b><\/strong><\/h4>\n

Trong qu\u00e1 tr\u00ecnh t\u1ea1o kh\u00ed c\u1ee7a n\u1ee9t \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t, kh\u00ed \u0111i v\u00e0o \u0111\u00fac v\u00e0 t\u1ea1o ra l\u1ed7 ch\u00e2n l\u00f4ng. S\u1ef1 bi\u1ebfn \u0111\u1ed9ng trong khi l\u00e0m \u0111\u1ea7y khu\u00f4n ho\u1eb7c c\u00e1c k\u1ef9 thu\u1eadt \u0111\u1ed5 kh\u00f4ng \u0111\u00fang \u0111\u1eafn, ch\u1eb3ng h\u1ea1n nh\u01b0 ti\u00eam tr\u00ean v\u00e0 ti\u00eam b\u00ean, c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a m\u1eabu \u0111\u01b0\u1ee3c bao quanh b\u1edfi kim lo\u1ea1i n\u00f3ng ch\u1ea3y. \u0110i\u1ec1u n\u00e0y b\u1eaby kh\u00ed t\u1ea1o ra, ng\u0103n ch\u1eb7n s\u1ef1 tho\u00e1t kh\u1ecfi c\u1ee7a n\u00f3 v\u00e0 d\u1eabn \u0111\u1ebfn khuy\u1ebft t\u1eadt \u0111\u1ed9 x\u1ed1p.<\/p>\n

M\u00f4 h\u00ecnh \u01b0\u1edbt ho\u1eb7c l\u1edbp ph\u1ee7<\/b><\/strong><\/h4>\n

N\u1ebfu m\u00f4 h\u00ecnh ch\u1ee9a \u0111\u1ed9 \u1ea9m ho\u1eb7c n\u1ebfu l\u1edbp ph\u1ee7 kh\u00f4ng \u0111\u1ee7 kh\u00f4, m\u1ed9t l\u01b0\u1ee3ng kh\u00ed \u0111\u00e1ng k\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra trong khi \u0111\u1ed5. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn phun tr\u1edf l\u1ea1i v\u00e0 t\u1ea1o ra l\u1ed7 ch\u00e2n l\u00f4ng trong \u0111\u00fac. H\u00e0m l\u01b0\u1ee3ng \u0111\u1ed9 \u1ea9m cao trong l\u1edbp ph\u1ee7 l\u00e0m tr\u1ea7m tr\u1ecdng h\u01a1n v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n

S\u1eed d\u1ee5ng Binder qu\u00e1 m\u1ee9c<\/b><\/strong><\/h4>\n

Vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ea5t li\u00ean k\u1ebft qu\u00e1 m\u1ee9c trong li\u00ean k\u1ebft m\u00f4 h\u00ecnh d\u1eabn \u0111\u1ebfn vi\u1ec7c t\u1ea1o ra kh\u00ed \u0111\u1ecba ph\u01b0\u01a1ng trong khi \u0111\u1ed5. Kh\u00ed n\u00e0y kh\u00f4ng th\u1ec3 tho\u00e1t kh\u1ecfi m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, g\u00e2y ra s\u1ef1 bi\u1ebfn \u0111\u1ed9ng v\u00e0 khuy\u1ebft t\u1eadt \u0111\u1ed9 x\u1ed1p trong \u0111\u00fac.<\/p>\n

Kh\u00f4ng kh\u00ed k\u00e9o trong khi \u0111\u1ed5<\/b><\/strong><\/h4>\n

Trong tr\u01b0\u1eddng h\u1ee3p sprue kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ea5p \u0111\u1ea7y ho\u00e0n to\u00e0n trong khi \u0111\u1ed5, kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u00e9o v\u00e0o h\u1ec7 th\u1ed1ng. N\u1ebfu kh\u00f4ng kh\u00ed n\u00e0y v\u1eabn b\u1ecb m\u1eafc k\u1eb9t trong kim lo\u1ea1i n\u00f3ng ch\u1ea3y, n\u00f3 d\u1eabn \u0111\u1ebfn khuy\u1ebft t\u1eadt \u0111\u1ed9 x\u1ed1p.<\/p>\n

Gi\u1ea3i ph\u00e1p cho khuy\u1ebft t\u1eadt \u0111\u00fac x\u1ed1p<\/b><\/strong><\/h3>\n

Tr\u00e1nh bi\u1ebfn \u0111\u1ed9ng v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng th\u1ea5m<\/b><\/strong><\/h4>\n

\u0110\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 bi\u1ebfn \u0111\u1ed9ng trong khi \u0111\u1ed5, thay th\u1ebf c\u00e1c l\u1edbp m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng trong khi \u0111i\u1ec1n khu\u00f4n. S\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 v\u00e0 khu\u00f4n c\u00e1t v\u1edbi \u0111\u1ed9 th\u1ea5m t\u0103ng c\u01b0\u1eddng \u0111\u1ea3m b\u1ea3o r\u1eb1ng kh\u00ed tho\u00e1t ra m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n

\u0110\u1ea3m b\u1ea3o kh\u00f4 \u0111\u00fang c\u00e1c m\u1eabu v\u00e0 l\u1edbp ph\u1ee7<\/b><\/strong><\/h4>\n

C\u00e1c m\u1eabu v\u00e0 l\u1edbp ph\u1ee7 ph\u1ea3i ho\u00e0n to\u00e0n kh\u00f4 tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u00e1nh t\u1ea1o ra kh\u00ed d\u01b0 th\u1eeba trong khi \u0111\u1ed5.<\/p>\n

S\u1eed d\u1ee5ng ch\u1ea5t li\u00ean k\u1ebft kh\u00ed th\u1ea5p<\/b><\/strong><\/h4>\n

Ch\u1ecdn ch\u1ea5t li\u00ean k\u1ebft c\u00f3 \u0111\u1eb7c t\u00ednh s\u1ea3n xu\u1ea5t kh\u00ed th\u1ea5p gi\u1ea3m thi\u1ec3u s\u1ef1 bi\u1ebfn \u0111\u1ed9ng \u0111\u1ecba ph\u01b0\u01a1ng g\u00e2y ra b\u1edfi s\u1ef1 gi\u1ea3i ph\u00f3ng kh\u00ed qu\u00e1 m\u1ee9c.<\/p>\n

Th\u1ef1c hi\u1ec7n h\u1ec7 th\u1ed1ng \u0111\u00f3ng c\u1eeda<\/b><\/strong><\/h4>\n

Vi\u1ec7c \u00e1p d\u1ee5ng m\u1ed9t h\u1ec7 th\u1ed1ng c\u1eeda \u0111\u00f3ng \u0111\u1ea3m b\u1ea3o kh\u00f4ng kh\u00ed kh\u00f4ng \u0111\u01b0\u1ee3c k\u00e9o v\u00e0o kim lo\u1ea1i n\u00f3ng ch\u1ea3y trong khi \u0111\u1ed5. Duy tr\u00ec m\u1ee9c kim lo\u1ea1i l\u1ecfng nh\u1ea5t qu\u00e1n trong c\u1ed1c ng\u00e3 c\u1eaft gi\u00fap gi\u1eef cho sprue \u0111\u1ea7y \u0111\u1ee7.<\/p>\n

C\u00e1t d\u00ednh \u0111\u00fac khuy\u1ebft t\u1eadt<\/b><\/strong>\u00a0trong Lost Form Casting <\/b><\/strong><\/h2>\n

Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn c\u1ee7a c\u00e1c v\u1ea5n \u0111\u1ec1 c\u00e1t d\u00ednh<\/b><\/strong><\/h3>\n

V\u1ea5n \u0111\u1ec1 l\u1edbp ph\u1ee7 ho\u1eb7c v\u1ebft n\u1ee9t<\/b><\/strong><\/h4>\n

L\u1ed7i d\u00ednh c\u00e1t th\u01b0\u1eddng x\u1ea3y ra khi l\u1edbp ph\u1ee7 s\u01a1n r\u01a1i xu\u1ed1ng ho\u1eb7c ph\u00e1t tri\u1ec3n c\u00e1c v\u1ebft n\u1ee9t, cho ph\u00e9p kim lo\u1ea1i n\u00f3ng ch\u1ea3y x\u00e2m nh\u1eadp v\u00e0o c\u00e1t \u0111\u00fac. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn c\u00e1t d\u00ednh c\u01a1 h\u1ecdc. N\u1ebfu c\u00e1c h\u1ea1t c\u00e1t m\u1ecbn ho\u1eb7c b\u1ee5i c\u00f3 m\u1eb7t trong c\u00e1t kh\u00f4, c\u00e1t d\u00ednh h\u00f3a h\u1ecdc c\u0169ng c\u00f3 th\u1ec3 ph\u00e1t sinh.<\/p>\n

S\u1ef1 n\u00e9n c\u00e1t ho\u1eb7c t\u00edch l\u0169y b\u1ee5i kh\u00f4ng \u0111\u1ee7<\/b><\/strong><\/h4>\n

Vi\u1ec7c n\u00e9n n\u00e9n kh\u00f4ng \u0111\u00fang c\u00e1ch c\u1ee7a c\u00e1t \u0111\u00fac t\u1ea1o ra kho\u1ea3ng tr\u1ed1ng cho ph\u00e9p kim lo\u1ea1i n\u00f3ng ch\u1ea3y x\u00e2m nh\u1eadp. T\u1ee5 t\u1ee5 b\u1ee5i l\u00e0m tr\u1ea7m tr\u1ecdng h\u01a1n n\u1eefa v\u1ea5n \u0111\u1ec1 n\u00e0y b\u1eb1ng c\u00e1ch gi\u1ea3m s\u1ef1 g\u1eafn k\u1ebft b\u1ec1 m\u1eb7t gi\u1eefa c\u00e1c l\u1edbp.<\/p>\n

\u00c1p l\u1ef1c ti\u00eau c\u1ef1c trong qu\u00e1 tr\u00ecnh<\/b><\/strong><\/h4>\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u00e1p su\u1ea5t \u00e2m \u0111\u1ed1i v\u1edbi d\u00f2ng ch\u1ea3y kim lo\u1ea1i n\u00f3ng ch\u1ea3y \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn xu h\u01b0\u1edbng d\u00ednh c\u00e1t. \u00c1p su\u1ea5t \u00e2m cao h\u01a1n l\u00e0m t\u0103ng t\u00ednh l\u1ecfng nh\u01b0ng l\u00e0m t\u0103ng li\u00ean k\u1ebft gi\u1eefa kim lo\u1ea1i v\u00e0 c\u00e1t.<\/p>\n

Bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c cho khuy\u1ebft t\u1eadt \u0111\u00fac c\u00e1t d\u00ednh<\/b><\/strong><\/h3>\n

Ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c t\u00ednh l\u1edbp ph\u1ee7 v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m kim lo\u1ea1i<\/b><\/strong><\/h4>\n

L\u1edbp ph\u1ee7 ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a ch\u00fang v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh kim lo\u1ea1i l\u1ecfng. L\u1edbp ph\u1ee7 c\u01b0\u1eddng \u0111\u1ed9 cao v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y t\u1ed1t ng\u0103n ch\u1eb7n n\u1ee9t trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n

\u0110i\u1ec1u ch\u1ec9nh \u00e1p su\u1ea5t ti\u00eau c\u1ef1c ph\u00f9 h\u1ee3p<\/b><\/strong><\/h4>\n

Duy tr\u00ec m\u1ee9c \u00e1p su\u1ea5t \u00e2m t\u1ed1i \u01b0u \u0111\u1ea3m b\u1ea3o s\u1ef1 l\u1ecfng \u0111\u1ea7y \u0111\u1ee7 m\u00e0 kh\u00f4ng li\u00ean k\u1ebft qu\u00e1 m\u1ee9c gi\u1eefa kim lo\u1ea1i v\u00e0 c\u00e1t \u0111\u00fac. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m s\u1ef1 x\u1ea3y ra c\u00e1t d\u00ednh.<\/p>\n

Gi\u1ea3i quy\u1ebft c\u00e1c \u0111i\u1ec3m n\u00f3ng v\u00e0 g\u00f3c trong \u0111\u00fac<\/b><\/strong><\/h4>\n

C\u00e1c \u0111i\u1ec3m n\u00f3ng v\u00e0 g\u00f3c d\u1ec5 b\u1ecb c\u00e1t d\u00ednh h\u01a1n do ti\u1ebfp x\u00fac l\u00e2u d\u00e0i v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao. C\u1ee7ng c\u1ed1 c\u00e1c khu v\u1ef1c n\u00e0y b\u1eb1ng l\u1edbp ph\u1ee7 d\u00e0y h\u01a1n ho\u1eb7c s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec7t cao h\u01a1n gi\u1ea3m thi\u1ec3u c\u00e1c khi\u1ebfm khuy\u1ebft.
\n<\/b><\/p>\n

\u0110\u1ed1i t\u00e1c v\u1edbi <\/b><\/strong>C\u00f4ng ty TNHH C\u00f4ng ngh\u1ec7 H\u00e0ng Ch\u00e2u Ouchen.<\/b><\/strong>
\n<\/b><\/strong><\/h2>\n

\"Thi\u1ebft<\/p>\n

C\u00f4ng ty TNHH C\u00f4ng ngh\u1ec7 H\u00e0ng Ch\u00e2u Ouchen.<\/b><\/u><\/strong><\/a>\u00a0chuy\u00ean v\u1ec1 thi\u1ebft b\u1ecb th\u00f4ng minh ti\u00ean ti\u1ebfn cho \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t<\/b><\/u><\/strong><\/a>bao g\u1ed3m c\u00e1c h\u1ec7 th\u1ed1ng t\u1ea1o b\u1ecdt tr\u01b0\u1edbc EPS, m\u00e1y \u00e9p d\u1ecdc \/ ngang, h\u1ec7 th\u1ed1ng ch\u00e2n kh\u00f4ng trung t\u00e2m v\u00e0 m\u00e1y tr\u1ed9n l\u1edbp ph\u1ee7 t\u1ef1 \u0111\u1ed9ng. V\u1edbi m\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t ho\u00e0n ch\u1ec9nh v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i nh\u01b0 \u0111\u00fac \u00e1p su\u1ea5t \u00e2m, \u0111i\u1ec1u khi\u1ec3n PLC t\u1eeb xa v\u00e0 s\u1ea5y ch\u1ed1ng bi\u1ebfn d\u1ea1ng, Ouchen <\/b><\/u><\/strong><\/a>\u0111\u1ea3m b\u1ea3o s\u1ea3n xu\u1ea5t \u1ed5n \u0111\u1ecbnh, hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1ea3m thi\u1ec3u l\u1ed7i. N\u1eb1m \u1edf trung t\u00e2m thi\u1ebft b\u1ecb EPS h\u00e0ng \u0111\u1ea7u c\u1ee7a Trung Qu\u1ed1c v\u00e0 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi nhi\u1ec1u b\u1eb1ng s\u00e1ng ch\u1ebf qu\u1ed1c gia v\u00e0 danh d\u1ef1 doanh nghi\u1ec7p c\u00f4ng ngh\u1ec7 cao, ch\u00fang t\u00f4i cung c\u1ea5p h\u1ed7 tr\u1ee3 cu\u1ed1i c\u00f9ng cho t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh \u0111\u00fac.<\/p>\n

Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i<\/b><\/u><\/strong><\/a>\u00a0\u0111\u1ec3 n\u00e2ng c\u1ea5p d\u00e2y chuy\u1ec1n \u0111\u00fac b\u1ecdt b\u1ecb m\u1ea5t c\u1ee7a b\u1ea1n v\u1edbi thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c, hi\u1ec7u qu\u1ea3 cao t\u1eeb Ouchen.<\/p>","protected":false},"excerpt":{"rendered":"

Wrinkle Casting Defect\u00a0in Lost Form Casting Causes of Wrinkle Casting Defect Wrinkle casting defects arise when polystyrene foam undergoes pyrolysis due to exposure to high-temperature molten metal. This process generates a significant amount of carbon, which accumulates on the cavity’s outer surface. These defects frequently occur at the colder ends of the liquid metal flow […]<\/p>\n","protected":false},"author":3,"featured_media":4363,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","jetpack_publicize_message":"Common Lost Foam Casting Defects and Their Causes","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[160,161],"tags":[],"class_list":["post-4360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","category-news-blog"],"acf":[],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts\/4360","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=4360"}],"version-history":[{"count":1,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts\/4360\/revisions"}],"predecessor-version":[{"id":4364,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/posts\/4360\/revisions\/4364"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/media\/4363"}],"wp:attachment":[{"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/media?parent=4360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/categories?post=4360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oc-epc.com\/vi\/wp-json\/wp\/v2\/tags?post=4360"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}