{"id":3734,"date":"2026-09-30T15:55:19","date_gmt":"2026-09-30T07:55:19","guid":{"rendered":"http:\/\/0"},"modified":"2026-09-22T17:59:10","modified_gmt":"2026-09-22T09:59:10","slug":"flow-marks-injection-molding-causes","status":"publish","type":"post","link":"https:\/\/www.jcinjectionmolding.com\/vi\/blog\/flow-marks-injection-molding-causes\/","title":{"rendered":"T\u1ea1i sao v\u1ebft ch\u1ea3y l\u1ea1i xu\u1ea5t hi\u1ec7n sau khi thay \u0111\u1ed5i quy tr\u00ecnh?"},"content":{"rendered":"
\n

V\u1ebft ch\u1ea3y trong \u00e9p phun th\u01b0\u1eddng quay tr\u1edf l\u1ea1i v\u00ec m\u1ed9t thay \u0111\u1ed5i quy tr\u00ecnh d\u1ecbch chuy\u1ec3n \u0111\u01b0\u1eddng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng lo\u1ea1i b\u1ecf c\u01a1 ch\u1ebf. V\u1ebft n\u00e0y c\u00f3 th\u1ec3 ghi l\u1ea1i m\u1eb7t tr\u01b0\u1edbc d\u00f2ng ch\u1ea3y ngu\u1ed9i, s\u1ef1 ch\u1ea7n ch\u1eeb, phun c\u1ed5ng, v\u1eadn t\u1ed1c kh\u00f4ng \u1ed5n \u0111\u1ecbnh, chuy\u1ec3n \u0111\u1ed5i \u0111\u1ed9 d\u00e0y ho\u1eb7c kh\u00e1c bi\u1ec7t sao ch\u00e9p b\u1ec1 m\u1eb7t. \u0110\u1ec3 kh\u1eafc ph\u1ee5c v\u0129nh vi\u1ec5n, h\u00e3y li\u00ean h\u1ec7 v\u1ebft v\u1edbi v\u1ecb tr\u00ed \u0111i\u1ec1n \u0111\u1ea7y v\u00e0 h\u00ecnh h\u1ecdc tr\u01b0\u1edbc khi thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c t\u1ed1c \u0111\u1ed9.<\/p>\n

\n

Th\u1eed nghi\u1ec7m h\u1eefu \u00edch nhanh nh\u1ea5t:<\/strong> th\u1ef1c hi\u1ec7n m\u1ed9t chu\u1ed7i b\u1eafn ng\u1eafn v\u00e0 ch\u1ed3ng v\u1ebft nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c l\u00ean m\u1eb7t tr\u01b0\u1edbc d\u00f2ng ch\u1ea3y \u0111ang ti\u1ebfn. N\u1ebfu v\u1ebft \u0111i theo \u0111i\u1ec3m ch\u1ea7n ch\u1eeb ho\u1eb7c t\u0103ng t\u1ed1c l\u1ea1i, h\u00ecnh h\u1ecdc chi ti\u1ebft v\u00e0 bi\u00ean d\u1ea1ng v\u1eadn t\u1ed1c \u0111\u00e3 cho b\u1ea1n bi\u1ebft n\u01a1i c\u1ea7n \u0111i\u1ec1u tra.<\/p>\n<\/div>\n

Trong b\u00e0i vi\u1ebft n\u00e0y:<\/strong><\/p>\n

    \n
  1. X\u00e1c \u0111\u1ecbnh h\u1ecd v\u1ebft<\/a><\/li>\n
  2. T\u00ecm nguy\u00ean nh\u00e2n h\u00ecnh h\u1ecdc<\/a><\/li>\n
  3. \u1ed4n \u0111\u1ecbnh m\u1eb7t tr\u01b0\u1edbc d\u00f2ng ch\u1ea3y<\/a><\/li>\n
  4. Ki\u1ec3m tra sao ch\u00e9p b\u1ec1 m\u1eb7t v\u00e0 nhi\u1ec7t<\/a><\/li>\n
  5. X\u00e1c minh tr\u00ean c\u1eeda s\u1ed5 quy tr\u00ecnh<\/a><\/li>\n
  6. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<\/ol>\n

    Kh\u00f4ng ph\u1ea3i m\u1ecdi \u0111\u01b0\u1eddng tr\u00ean b\u1ec1 m\u1eb7t \u0111\u1ec1u l\u00e0 c\u00f9ng m\u1ed9t khuy\u1ebft t\u1eadt<\/h2>\n

    \"flow-mark-after-wall-thickness-transition\"<\/p>\n

    M\u1ed9t s\u00f3ng l\u1eb7p l\u1ea1i g\u1ea7n c\u1ed5ng c\u00f3 th\u1ec3 ch\u1ec9 ra phun ho\u1eb7c d\u00f2ng ch\u1ea3y ban \u0111\u1ea7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh. M\u1ed9t \u0111\u01b0\u1eddng sau g\u00e2n ho\u1eb7c m\u1edf r\u1ed9ng \u0111\u1ed9t ng\u1ed9t c\u00f3 th\u1ec3 ghi l\u1ea1i s\u1ef1 ch\u1ea7n ch\u1eeb. Ranh gi\u1edbi t\u1eeb m\u1edd \u0111\u1ebfn b\u00f3ng c\u00f3 th\u1ec3 \u0111\u1ebfn t\u1eeb s\u1ef1 thay \u0111\u1ed5i ti\u1ebfp x\u00fac b\u1ec1 m\u1eb7t ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 m\u1eb7t tr\u01b0\u1edbc d\u00f2ng ch\u1ea3y. \u0110\u01b0\u1eddng h\u00e0n h\u00ecnh th\u00e0nh n\u01a1i c\u00e1c m\u1eb7t tr\u01b0\u1edbc g\u1eb7p nhau v\u00e0 c\u1ea7n m\u1ed9t l\u1ed9 tr\u00ecnh kh\u1eafc ph\u1ee5c kh\u00e1c.<\/p>\n

    Ki\u1ec3m tra c\u1ea3 hai m\u1eb7t c\u1ee7a chi ti\u1ebft v\u00e0 so s\u00e1nh c\u00e1c khoang. Ghi ch\u00fa xem \u0111\u01b0\u1eddng \u0111\u00f3 c\u00f3 n\u1ed5i l\u00ean, l\u00f5m xu\u1ed1ng, kh\u00e1c v\u1ec1 \u0111\u1ed9 b\u00f3ng hay ch\u1ec9 nh\u00ecn th\u1ea5y d\u01b0\u1edbi \u00e1nh s\u00e1ng nh\u1ea5t \u0111\u1ecbnh. Tr\u00ean c\u00e1c chi ti\u1ebft trong su\u1ed1t, c\u0169ng xem \u00e1nh s\u00e1ng truy\u1ec1n qua v\u00ec s\u1ef1 thay \u0111\u1ed5i b\u1ec1 m\u1eb7t ho\u1eb7c \u0111\u1ecbnh h\u01b0\u1edbng tinh t\u1ebf c\u00f3 th\u1ec3 m\u1ea1nh h\u01a1n v\u1ec1 m\u1eb7t quang h\u1ecdc so v\u1edbi th\u1ea9m m\u1ef9.<\/p>\n

    V\u1ebft th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u n\u01a1i d\u00f2ng ch\u1ea3y m\u1ea5t \u0111\u00e0<\/h2>\n

    Thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y \u0111\u1ed9t ng\u1ed9t, chuy\u1ec3n \u0111\u1ed5i t\u1eeb m\u1ecfng sang d\u00e0y, g\u00e2n, tr\u1ee5 v\u00e0 v\u00f9ng m\u1edf r\u1ed9ng l\u1edbn l\u00e0m thay \u0111\u1ed5i v\u1eadn t\u1ed1c c\u1ee5c b\u1ed9 v\u00e0 l\u00e0m ngu\u1ed9i. Nh\u1ef1a n\u00f3ng ch\u1ea3y c\u00f3 th\u1ec3 ch\u1ea7n ch\u1eeb trong m\u1ed9t nh\u00e1nh m\u1ecfng trong khi v\u00f9ng kh\u00e1c \u0111i\u1ec1n \u0111\u1ea7y, r\u1ed3i kh\u1edfi \u0111\u1ed9ng l\u1ea1i v\u1edbi l\u1edbp da ngu\u1ed9i h\u01a1n. S\u1ef1 kh\u1edfi \u0111\u1ed9ng l\u1ea1i \u0111\u00f3 c\u00f3 th\u1ec3 v\u1eabn nh\u00ecn th\u1ea5y nh\u01b0 m\u1ed9t ranh gi\u1edbi.<\/p>\n

    Bo tr\u00f2n c\u00e1c chuy\u1ec3n \u0111\u1ed5i n\u01a1i ch\u1ee9c n\u0103ng cho ph\u00e9p, gi\u1eef thay \u0111\u1ed5i th\u00e0nh d\u1ea7n d\u1ea7n v\u00e0 tr\u00e1nh c\u1ed5ng phun v\u00e0o kh\u00f4ng gian m\u1edf m\u00e0 kh\u00f4ng ti\u1ebfp x\u00fac th\u00e0nh. Di chuy\u1ec3n c\u1ed5ng c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n m\u1ed9t b\u1ec1 m\u1eb7t trong khi di chuy\u1ec3n \u0111\u01b0\u1eddng h\u00e0n v\u00e0o \u0111\u01b0\u1eddng quang h\u1ecdc, v\u00ec v\u1eady h\u00e3y \u0111\u00e1nh gi\u00e1 to\u00e0n b\u1ed9 m\u1eabu \u0111i\u1ec1n \u0111\u1ea7y.<\/p>\n

    Ki\u1ec3m so\u00e1t v\u1eadn t\u1ed1c t\u1ea1i v\u1ecb tr\u00ed khuy\u1ebft t\u1eadt, kh\u00f4ng ch\u1ec9 t\u1ea1i m\u00e1y<\/h2>\n

    \"polished-cavity-surface-under-inspection-light\"<\/p>\n

    T\u1ed1c \u0111\u1ed9 tr\u1ee5c v\u00edt c\u1ee7a m\u00e1y kh\u00f4ng gi\u1ed1ng v\u1edbi v\u1eadn t\u1ed1c m\u1eb7t tr\u01b0\u1edbc d\u00f2ng ch\u1ea3y. Khi di\u1ec7n t\u00edch d\u00f2ng ch\u1ea3y d\u1ef1 ki\u1ebfn c\u1ee7a khoang thay \u0111\u1ed5i, m\u1eb7t tr\u01b0\u1edbc c\u00f3 th\u1ec3 t\u0103ng t\u1ed1c ho\u1eb7c ch\u1eadm l\u1ea1i ngay c\u1ea3 khi t\u1ed1c \u0111\u1ed9 l\u1eadp tr\u00ecnh kh\u00f4ng \u0111\u1ed5i. S\u1eed d\u1ee5ng \u0111i\u1ec1n theo giai \u0111o\u1ea1n d\u1ef1a tr\u00ean v\u1ecb tr\u00ed tr\u1ee5c v\u00edt v\u00e0 b\u1eb1ng ch\u1ee9ng t\u1eeb c\u00e1c l\u1ea7n b\u1eafn thi\u1ebfu \u0111\u1ec3 qu\u1ea3n l\u00fd giai \u0111o\u1ea1n chuy\u1ec3n ti\u1ebfp quan tr\u1ecdng.<\/p>\n

    Nhi\u1ec7t \u0111\u1ed9 nh\u1ef1a n\u00f3ng ch\u1ea3y v\u00e0 khu\u00f4n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian b\u1ec1 m\u1eb7t c\u00f2n kh\u1ea3 n\u0103ng sao ch\u00e9p b\u1ec1 m\u1eb7t th\u00e9p. T\u0103ng ch\u00fang c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n v\u1ebft ngu\u1ed9i, nh\u01b0ng c\u0169ng thay \u0111\u1ed5i chu k\u1ef3, \u0111\u1ed9 co r\u00fat v\u00e0 nguy c\u01a1 ph\u00e2n h\u1ee7y. X\u00e1c nh\u1eadn \u0111i\u1ec1u ki\u1ec7n nh\u1ef1a n\u00f3ng ch\u1ea3y v\u00e0 khu\u00f4n th\u1ef1c t\u1ebf v\u00e0 duy tr\u00ec trong c\u1eeda s\u1ed5 gia c\u00f4ng c\u1ee7a nh\u00e0 cung c\u1ea5p nh\u1ef1a.<\/p>\n

    Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 ti\u1ebft l\u1ed9 ranh gi\u1edbi nhi\u1ec7t<\/h2>\n

    M\u1ed9t m\u1eb7t quang h\u1ecdc \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng cho th\u1ea5y nh\u1eefng kh\u00e1c bi\u1ec7t nh\u1ecf trong sao ch\u00e9p. Nhi\u1ec7t \u0111\u1ed9 khu\u00f4n kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, nhi\u1ec5m b\u1ea9n, c\u1eb7n l\u1eafng trong l\u1ed7 th\u00f4ng h\u01a1i ho\u1eb7c k\u1ebft c\u1ea5u th\u00e9p c\u1ee5c b\u1ed9 c\u00f3 th\u1ec3 l\u00e0m ranh gi\u1edbi d\u00f2ng ch\u1ea3y tr\u1edf n\u00ean r\u00f5 r\u00e0ng. L\u00e0m s\u1ea1ch v\u00e0 ki\u1ec3m tra khoang tr\u01b0\u1edbc khi x\u00e2y d\u1ef1ng m\u1ed9t hi\u1ec7u ch\u1ec9nh quy tr\u00ecnh ph\u1ee9c t\u1ea1p xung quanh b\u1ec1 m\u1eb7t b\u1ecb h\u01b0 h\u1ea1i.<\/p>\n

    Th\u00f4ng h\u01a1i quan tr\u1ecdng t\u1ea1i v\u00f9ng m\u00e0 kh\u00f4ng kh\u00ed b\u1ecb n\u00e9n. C\u00e1c l\u1ed7 th\u00f4ng h\u01a1i b\u1ecb h\u1ea1n ch\u1ebf c\u00f3 th\u1ec3 thay \u0111\u1ed5i ti\u1ebfp x\u00fac b\u1ec1 m\u1eb7t ho\u1eb7c t\u1ea1o ra ch\u00e1y v\u00e0 c\u1eb7n l\u1eafng. C\u1ea7n x\u00e1c nh\u1eadn hi\u1ec7u ch\u1ec9nh th\u00f4ng h\u01a1i v\u1ec1 nguy c\u01a1 ba via tr\u00ean to\u00e0n b\u1ed9 c\u1eeda s\u1ed5 \u00e1p su\u1ea5t cho ph\u00e9p.<\/p>\n

    M\u1ed9t s\u1eeda ch\u1eefa th\u1ea9m m\u1ef9 ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng<\/h2>\n

    \"flow-mark-validation-across-process-window\"<\/p>\n

    Khi v\u1ebft \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, h\u00e3y ki\u1ec3m tra gi\u1ea3i ph\u00e1p tr\u00ean c\u00e1c l\u00f4 v\u1eadt li\u1ec7u, khoang, nhi\u1ec7t \u0111\u1ed9 khu\u00f4n v\u00e0 gi\u00e1n \u0111o\u1ea1n chu k\u1ef3 th\u1ef1c t\u1ebf. Theo d\u00f5i c\u00f9ng ti\u00eau chu\u1ea9n chi\u1ebfu s\u00e1ng v\u00e0 quan s\u00e1t. M\u1ed9t c\u00e0i \u0111\u1eb7t ch\u1ec9 che gi\u1ea5u v\u1ebft \u1edf m\u1ed9t nhi\u1ec7t \u0111\u1ed9 cao kh\u00f4ng ph\u1ea3i l\u00e0 ki\u1ec3m so\u00e1t s\u1ea3n xu\u1ea5t b\u1ec1n v\u1eefng.<\/p>\n

    \u0110\u1ed1i v\u1edbi \u00c9p phun quang h\u1ecdc & trong su\u1ed1t<\/a>, th\u00eam ki\u1ec3m tra \u00e1nh s\u00e1ng truy\u1ec1n qua ho\u1eb7c ki\u1ec3m tra ch\u1ee9c n\u0103ng \u1edf n\u01a1i chi ti\u1ebft d\u1eabn, t\u1ea1o \u1ea3nh ho\u1eb7c ph\u00e2n ph\u1ed1i \u00e1nh s\u00e1ng. M\u1ed9t ranh gi\u1edbi ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c v\u1ec1 m\u1eb7t th\u1ecb gi\u00e1c v\u1eabn c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u01b0\u1eddng \u0111i quang h\u1ecdc.<\/p>\n\n\n\n\n\n\n\n
    B\u1eb1ng ch\u1ee9ng<\/th>\nGi\u1ea3 thuy\u1ebft \u0111\u1ea7u ti\u00ean<\/th>\nKi\u1ec3m tra ti\u1ebfp theo<\/th>\n<\/tr>\n<\/thead>\n
    S\u00f3ng ngay sau c\u1ed5ng phun<\/td>\nPhun tia ho\u1eb7c d\u00f2ng v\u00e0o kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/td>\nH\u01b0\u1edbng c\u1ed5ng v\u00e0 v\u1eadn t\u1ed1c ban \u0111\u1ea7u<\/td>\n<\/tr>\n
    \u0110\u01b0\u1eddng sau khi thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y<\/td>\nDo d\u1ef1 ho\u1eb7c t\u0103ng t\u1ed1c l\u1ea1i<\/td>\nThi\u1ebfu shot v\u00e0 \u0111i\u1ec1n theo giai \u0111o\u1ea1n<\/td>\n<\/tr>\n
    Ranh gi\u1edbi b\u00f3ng m\u1ed9t khoang<\/td>\nV\u1ea5n \u0111\u1ec1 b\u1ec1 m\u1eb7t ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 c\u1ee5c b\u1ed9<\/td>\nKi\u1ec3m tra khoang, l\u1ed7 tho\u00e1t kh\u00ed v\u00e0 l\u00e0m m\u00e1t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 hi\u1ec3n th\u1ecb tr\u01b0\u1edbc khi t\u1ed1i \u01b0u h\u00f3a n\u00f3 \u0111i<\/h3>\n

    Th\u1ed1ng nh\u1ea5t v\u1ec1 ngu\u1ed3n s\u00e1ng, g\u00f3c, n\u1ec1n, kho\u1ea3ng c\u00e1ch quan s\u00e1t v\u00e0 v\u00f9ng ki\u1ec3m tra. M\u1ed9t \u0111\u01b0\u1eddng c\u00f3 th\u1ec3 v\u00f4 h\u00ecnh d\u01b0\u1edbi \u00e1nh s\u00e1ng khu\u1ebfch t\u00e1n trong ph\u00f2ng nh\u01b0ng l\u1ea1i r\u00f5 r\u00e0ng d\u01b0\u1edbi \u0111\u00e8n n\u1ec1n b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi. \u0110i\u1ec1u ki\u1ec7n ki\u1ec3m tra \u1ed5n \u0111\u1ecbnh ng\u0103n quy tr\u00ecnh b\u1ecb \u0111i\u1ec1u ch\u1ec9nh theo g\u00f3c nh\u00ecn c\u1ee7a m\u1ed9t ng\u01b0\u1eddi.<\/p>\n

    Khi g\u1eedi m\u1ed9t chi ti\u1ebft \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, h\u00e3y k\u00e8m theo c\u00e1c shot thi\u1ebfu, m\u1ed9t m\u1eabu ch\u01b0a c\u1eaft ba via, nh\u1eadn d\u1ea1ng khoang, th\u00f4ng tin c\u1ed5ng v\u00e0 \u0111\u1ed9 d\u00e0y th\u00e0nh, c\u1ea5p nh\u1ef1a v\u00e0 c\u00e1c c\u00e0i \u0111\u1eb7t t\u1eeb giai \u0111o\u1ea1n t\u1ed1t v\u00e0 x\u1ea5u. S\u1ef1 t\u01b0\u01a1ng ph\u1ea3n gi\u1eefa c\u00e1c giai \u0111o\u1ea1n \u0111\u00f3 th\u01b0\u1eddng h\u1eefu \u00edch h\u01a1n m\u1ed9t b\u1ea3ng thi\u1ebft l\u1eadp danh ngh\u0129a duy nh\u1ea5t.<\/p>\n

    Ph\u00e2n bi\u1ec7t hi\u1ec7u ch\u1ec9nh m\u1ea1nh m\u1ebd v\u1edbi che gi\u1ea5u b\u1ec1 ngo\u00e0i<\/h3>\n

    K\u1ebft c\u1ea5u, l\u1edbp ph\u1ee7 ho\u1eb7c m\u00e0u nhu\u1ed9m c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 hi\u1ec3n th\u1ecb, nh\u01b0ng n\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 che gi\u1ea5u s\u1ef1 b\u1ea5t \u1ed5n \u0111\u1ecbnh d\u00f2ng ch\u1ea3y. N\u1ebfu v\u1ebft \u0111\u00f3 c\u0169ng th\u1ec3 hi\u1ec7n \u1ee9ng su\u1ea5t, m\u1ed1i h\u00e0n y\u1ebfu ho\u1eb7c sao ch\u00e9p k\u00e9m, vi\u1ec7c che gi\u1ea5u n\u00f3 kh\u00f4ng gi\u1ea3i quy\u1ebft ch\u1ee9c n\u0103ng. X\u00e1c nh\u1eadn k\u1ebft qu\u1ea3 k\u00edch th\u01b0\u1edbc v\u00e0 c\u01a1 h\u1ecdc tr\u01b0\u1edbc khi ch\u1ea5p nh\u1eadn m\u1ed9t thao t\u00e1c th\u1ee9 c\u1ea5p mang t\u00ednh th\u1ea9m m\u1ef9 nh\u01b0 l\u00e0 gi\u1ea3i ph\u00e1p l\u00e2u d\u00e0i.<\/p>\n

    M\u1ed9t hi\u1ec7u ch\u1ec9nh m\u1ea1nh m\u1ebd n\u00ean v\u1eabn hi\u1ec7u qu\u1ea3 qua kh\u1edfi \u0111\u1ed9ng, s\u1ea3n xu\u1ea5t danh ngh\u0129a v\u00e0 bi\u1ebfn \u0111\u1ed9ng d\u1ef1 ki\u1ebfn v\u1ec1 l\u00f4 nh\u1ef1a, nhi\u1ec7t \u0111\u1ed9 khu\u00f4n v\u00e0 chu k\u1ef3. Ghi l\u1ea1i b\u1eb1ng ch\u1ee9ng shot thi\u1ebfu v\u00e0 c\u01a1 ch\u1ebf \u0111\u00e3 thay \u0111\u1ed5i. H\u1ed3 s\u01a1 \u0111\u00f3 gi\u00fap c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean t\u01b0\u01a1ng lai kh\u00f4i ph\u1ee5c quy tr\u00ecnh m\u00e0 kh\u00f4ng l\u1eb7p l\u1ea1i c\u00e1c \u0111i\u1ec1u ch\u1ec9nh ng\u1eabu nhi\u00ean.<\/p>\n

    C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

    \"molding-team-tracing-recurring-flow-marks\"<\/p>\n

    Phun nhanh h\u01a1n c\u00f3 lu\u00f4n lo\u1ea1i b\u1ecf v\u1ebft d\u00f2ng ch\u1ea3y kh\u00f4ng?<\/h3>\n

    Kh\u00f4ng. N\u00f3 c\u00f3 th\u1ec3 gi\u1eef m\u1eb7t tr\u01b0\u1edbc n\u00f3ng h\u01a1n, nh\u01b0ng c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o ra phun tia, c\u1eaft ho\u1eb7c kh\u00ed b\u1ecb gi\u1eef l\u1ea1i. Kh\u1edbp v\u1eadn t\u1ed1c v\u1edbi v\u1ecb tr\u00ed khuy\u1ebft t\u1eadt.<\/p>\n

    Can polishing the mold remove the mark?<\/h3>\n

    Only if surface condition is the cause. Polishing does not correct hesitation, gate jetting or an unstable thermal boundary and can change optical form.<\/p>\n

    Why does the mark return after maintenance?<\/h3>\n

    Cleaning, reassembly, cooling connection, vent condition or hot-runner balance may have changed. Compare cavity and process records before and after the event.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Flow marks in injection molding often return because a process change moves the visible line without removing the mechanism. The mark may record a cold flow front, hesitation, gate jetting, unstable velocity, thickness transition or surface replication difference. To correct it permanently, relate the mark to fill position and geometry before changing temperature or speed. […]<\/p>\n","protected":false},"author":1,"featured_media":3816,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3734","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/posts\/3734","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/comments?post=3734"}],"version-history":[{"count":0,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/posts\/3734\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/media\/3816"}],"wp:attachment":[{"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/media?parent=3734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/categories?post=3734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jcinjectionmolding.com\/vi\/wp-json\/wp\/v2\/tags?post=3734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}