{"id":5041,"date":"2026-05-22T00:00:36","date_gmt":"2026-05-21T16:00:36","guid":{"rendered":"https:\/\/www.oc-epc.com\/?p=5041"},"modified":"2026-05-19T16:04:16","modified_gmt":"2026-05-19T08:04:16","slug":"vi-sao-cac-xuong-duc-dua-vao-may-gian-no-truoc-eps-cho-qua-trinh-duc-khuon-xop","status":"publish","type":"post","link":"https:\/\/www.oc-epc.com\/vi\/news-blog\/industry-news\/why-foundries-rely-on-eps-pre-expander-machines-for-lost-foam-casting\/","title":{"rendered":"V\u00ec sao c\u00e1c x\u01b0\u1edfng \u0111\u00fac d\u1ef1a v\u00e0o m\u00e1y gi\u00e3n n\u1edf s\u01a1 b\u1ed9 EPS cho ph\u01b0\u01a1ng ph\u00e1p \u0111\u00fac khu\u00f4n x\u1ed1p?"},"content":{"rendered":"

T\u00ecm hi\u1ec3u v\u1ec1 k\u1ef9 thu\u1eadt \u0111\u00fac khu\u00f4n x\u1ed1p v\u00e0 quy tr\u00ecnh ti\u1ec1n gi\u00e3n n\u1edf<\/strong><\/h2>\n

M\u1ea5t b\u1ecdt \u0111\u00fac<\/strong><\/a> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u00fac khu\u00f4n m\u1eabu bay h\u01a1i. N\u00f3 l\u00e0 m\u1ed9t quy tr\u00ecnh \u0111\u00fac kim lo\u1ea1i h\u1eefu \u00edch. Nhi\u1ec1u c\u00f4ng ty trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, m\u00e1y m\u00f3c v\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb h\u1ea1ng n\u1eb7ng s\u1eed d\u1ee5ng n\u00f3. Quy tr\u00ecnh n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c khu\u00f4n m\u1eabu b\u1eb1ng b\u1ecdt. C\u00e1c khu\u00f4n m\u1eabu n\u00e0y s\u1ebd bi\u1ebfn th\u00e0nh h\u01a1i khi kim lo\u1ea1i \u0111\u01b0\u1ee3c r\u00f3t v\u00e0o. Ch\u00fang t\u1ea1o ra c\u00e1c kho\u1ea3ng tr\u1ed1ng ch\u00ednh x\u00e1c. M\u00e1y ti\u1ec1n gi\u00e3n n\u1edf EPS \u0111\u00f3ng vai tr\u00f2 trung t\u00e2m. N\u00f3 chu\u1ea9n b\u1ecb c\u00e1c h\u1ea1t polystyrene gi\u00e3n n\u1edf v\u1edbi m\u1eadt \u0111\u1ed9 v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ph\u00f9 h\u1ee3p cho vi\u1ec7c \u0111\u00fac khu\u00f4n m\u1eabu.<\/p>\n

\u0110\u00fac khu\u00f4n b\u1eb1ng b\u1ecdt x\u1ed1p b\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ed9t khu\u00f4n m\u1eabu b\u1eb1ng b\u1ecdt x\u1ed1p. Khu\u00f4n m\u1eabu n\u00e0y kh\u1edbp v\u1edbi chi ti\u1ebft kim lo\u1ea1i cu\u1ed1i c\u00f9ng. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t tr\u01b0\u1edbc ti\u00ean l\u00e0m gi\u00e3n n\u1edf c\u00e1c h\u1ea1t x\u1ed1p EPS th\u00f4. Sau \u0111\u00f3, h\u1ecd t\u1ea1o h\u00ecnh c\u00e1c h\u1ea1t x\u1ed1p th\u00e0nh c\u00e1c khu\u00f4n m\u1eabu. Ti\u1ebfp theo, h\u1ecd gh\u00e9p c\u00e1c c\u1ee5m h\u1ea1t l\u1ea1i v\u1edbi nhau, th\u00eam l\u1edbp ph\u1ee7 ch\u1ecbu nhi\u1ec7t, \u0111\u1eb7t ch\u00fang v\u00e0o c\u00e1t kh\u00f4ng li\u00ean k\u1ebft v\u00e0 \u0111\u1ed5 kim lo\u1ea1i n\u00f3ng ch\u1ea3y v\u00e0o. B\u1ecdt x\u1ed1p bay h\u01a1i, v\u00e0 kim lo\u1ea1i l\u1ea5p \u0111\u1ea7y kh\u00f4ng gian tr\u1ed1ng.<\/p>\n

Giai \u0111o\u1ea1n gi\u00e3n n\u1edf s\u01a1 b\u1ed9 ki\u1ec3m so\u00e1t m\u1eadt \u0111\u1ed9, \u0111\u1ed9 \u0111\u1ed3ng nh\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ea3y c\u1ee7a m\u1ed1i h\u00e0n. N\u1ebfu qu\u00e1 tr\u00ecnh gi\u00e3n n\u1edf s\u01a1 b\u1ed9 kh\u00f4ng nh\u1ea5t qu\u00e1n, s\u1ebd xu\u1ea5t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1. Ch\u00fang bao g\u1ed3m c\u00e1c b\u1ea5t th\u01b0\u1eddng tr\u00ean b\u1ec1 m\u1eb7t, \u0111\u1ed9 r\u1ed7 kh\u00ed, sai l\u1ec7ch k\u00edch th\u01b0\u1edbc, hi\u1ec7n t\u01b0\u1ee3ng ch\u00e1y c\u00e1t ho\u1eb7c c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn l\u1edbp ph\u1ee7 trong s\u1ea3n ph\u1ea9m \u0111\u00fac cu\u1ed1i c\u00f9ng. M\u00e1y gi\u00e3n n\u1edf s\u01a1 b\u1ed9 EPS hi\u1ec7n \u0111\u1ea1i gi\u1ea3i quy\u1ebft nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y. Ch\u00fang s\u1eed d\u1ee5ng s\u1ef1 ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c v\u1ec1 nhi\u1ec7t \u0111\u1ed9, \u00e1p su\u1ea5t v\u00e0 vi\u1ec7c x\u1eed l\u00fd v\u1eadt li\u1ec7u.<\/p>\n

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\"M\u00e1y<\/div>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a m\u00e1y ti\u1ec1n gi\u00e3n n\u1edf EPS t\u1ef1 \u0111\u1ed9ng ho\u00e0n to\u00e0n ti\u00ean ti\u1ebfn<\/strong><\/h2>\n

Hi\u1ec7n t\u1ea1i Thi\u1ebft b\u1ecb t\u1ea1o b\u1ecdt s\u01a1 b\u1ed9 cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea1o b\u1ecdt r\u1eddi<\/strong><\/a> H\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o b\u1ecdt k\u1ebft h\u1ee3p \u0111i\u1ec7n t\u1eeb v\u00e0 h\u01a1i n\u01b0\u1edbc. H\u1ec7 th\u1ed1ng duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh 98 \u0111\u1ed9 C trong th\u00f9ng t\u1ea1o b\u1ecdt b\u1eb1ng gia nhi\u1ec7t \u0111i\u1ec7n t\u1eeb. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u00f4i tr\u01b0\u1eddng kh\u00f4 r\u00e1o, kh\u00f4ng c\u00f3 n\u01b0\u1edbc, gi\u00fap ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng \"h\u1ea1t ch\u1ebft\" - nh\u1eefng h\u1ea1t ch\u01b0a n\u1edf ho\u1eb7c n\u1edf k\u00e9m, l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng hoa v\u0103n.<\/p>\n

\u01afu \u0111i\u1ec3m k\u1ef9 thu\u1eadt c\u1ed1t l\u00f5i bao g\u1ed3m c\u00e1c \u0111i\u1ec3m sau: H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n PLC v\u1edbi ch\u1ee9c n\u0103ng l\u01b0u tr\u1eef th\u00f4ng s\u1ed1 cho ph\u00e9p ng\u01b0\u1eddi v\u1eadn h\u00e0nh l\u01b0u v\u00e0 g\u1ecdi l\u1ea1i c\u00e1c c\u00f4ng th\u1ee9c gi\u00e3n n\u1edf tr\u01b0\u1edbc cho c\u00e1c v\u1eadt li\u1ec7u v\u00e0 m\u1eadt \u0111\u1ed9 kh\u00e1c nhau. Kh\u1edfi \u0111\u1ed9ng ch\u1ec9 b\u1eb1ng m\u1ed9t c\u00fa nh\u1ea5p chu\u1ed9t h\u1ed7 tr\u1ee3 v\u1eadn h\u00e0nh ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y c\u0169ng gi\u00fap theo d\u00f5i ch\u1ea5t l\u01b0\u1ee3ng theo ca v\u00e0 \u0111\u1ea3m b\u1ea3o s\u1ea3n l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh. Vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t ch\u00ednh x\u00e1c d\u1ef1a tr\u00ean c\u00e1c van t\u1ef7 l\u1ec7 cho nhi\u1ec7t \u0111\u1ed9 bu\u1ed3ng v\u00e0 van gi\u1ea3m \u00e1p cho l\u01b0\u1ee3ng h\u01a1i n\u01b0\u1edbc \u0111\u1ea7u v\u00e0o. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra k\u1ebft qu\u1ea3 l\u1eb7p l\u1ea1i \u0111\u01b0\u1ee3c gi\u1eefa c\u00e1c m\u1ebb s\u1ea3n xu\u1ea5t.<\/p>\n

Kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n th\u00f4ng qua giao di\u1ec7n ng\u01b0\u1eddi-m\u00e1y. Ch\u00fang cho ph\u00e9p gi\u00e1m s\u00e1t t\u1eeb xa, n\u00e2ng c\u1ea5p h\u1ec7 th\u1ed1ng, \u0111i\u1ec1u ch\u1ec9nh th\u00f4ng s\u1ed1 v\u00e0 ch\u1ea9n \u0111o\u00e1n. Ch\u00fang gi\u00fap gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng trong c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t l\u1edbn. H\u1ec7 th\u1ed1ng s\u1ea5y t\u1ea7ng s\u00f4i t\u00edch h\u1ee3p v\u1edbi s\u00e0ng rung x\u1eed l\u00fd v\u1eadt li\u1ec7u sau qu\u00e1 tr\u00ecnh gi\u00e3n n\u1edf. H\u1ec7 th\u1ed1ng n\u00e0y \u0111\u01b0a v\u1eadt li\u1ec7u qua s\u00e0ng rung hai l\u1edbp b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec3 l\u1ecdc s\u01a1 b\u1ed9 tr\u01b0\u1edbc khi \u1ee7. B\u01b0\u1edbc n\u00e0y lo\u1ea1i b\u1ecf t\u1ea1p ch\u1ea5t v\u00e0 gi\u1eef cho c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 \u0111\u1ec1u.<\/p>\n

S\u1ea3n l\u01b0\u1ee3ng h\u1ea1t cao c\u1ea5p \u0111\u1ebfn t\u1eeb c\u00f4ng ngh\u1ec7 t\u1ea1o b\u1ecdt lai. C\u00f4ng ngh\u1ec7 n\u00e0y t\u1ea1o ra c\u00e1c h\u1ea1t ho\u00e0n ch\u1ec9nh, kh\u00f4ng b\u1ecb v\u1ee1 v\u00e0 c\u00f3 b\u1ec1 m\u1eb7t nh\u1eb5n m\u1ecbn. Thi\u1ebft k\u1ebf x\u1ea3 \u0111\u00e1y t\u1eeb th\u00f9ng cho ph\u00e9p d\u1ee1 h\u00e0ng nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3, tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng v\u00f3n c\u1ee5c. \u0110\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng cao nh\u1edd c\u00e2n \u0111i\u1ec7n t\u1eed gi\u00fap ki\u1ec3m so\u00e1t sai l\u1ec7ch tr\u1ecdng l\u01b0\u1ee3ng tr\u01b0\u1edbc khi gi\u00e3n n\u1edf trong ph\u1ea1m vi \u00b11 gram. M\u1ee9c \u0111\u1ed9 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi dung sai ch\u1eb7t ch\u1ebd v\u1ec1 m\u1eadt \u0111\u1ed9 hoa v\u0103n.<\/p>\n

C\u00e1c t\u00ednh n\u0103ng an to\u00e0n bao g\u1ed3m b\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9 v\u00e0 b\u1ea3o v\u1ec7 khi m\u1ea5t \u0111i\u1ec7n. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady ho\u1ea1t \u0111\u1ed9ng. H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t t\u1ef1 \u0111\u1ed9ng b\u1eb1ng kh\u00ed n\u00e9n cho th\u00f9ng t\u1ea1o b\u1ecdt sau khi x\u1ea3 c\u0169ng gi\u00fap r\u00fat ng\u1eafn th\u1eddi gian chu k\u1ef3. C\u00e1c m\u00e1y n\u00e0y ho\u1ea1t \u0111\u1ed9ng v\u1edbi nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u kh\u00e1c nhau. Ch\u00fang x\u1eed l\u00fd EPS, FD v\u00e0 c\u00e1c ch\u1ea5t \u0111\u1ed3ng tr\u00f9ng h\u1ee3p. \u0110i\u1ec1u n\u00e0y l\u00e0m cho ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng t\u1ea1o b\u1ecdt r\u1eddi.<\/p>\n