{"id":791,"date":"2026-03-30T05:07:42","date_gmt":"2026-03-30T05:07:42","guid":{"rendered":"https:\/\/ninhson-vn.com\/?p=791"},"modified":"2026-03-30T05:07:42","modified_gmt":"2026-03-30T05:07:42","slug":"loi-sink-mark-vet-lom-tren-san-pham-ep-nhua","status":"publish","type":"post","link":"https:\/\/ninhson-vn.com\/?p=791","title":{"rendered":"L\u1ed6I SINK MARK (V\u1ebeT L\u00d5M) TR\u00caN S\u1ea2N PH\u1ea8M \u00c9P NH\u1ef0A"},"content":{"rendered":"

1. L\u1ed6I SINK MARK (V\u1ebeT L\u00d5M) TR\u00caN S\u1ea2N PH\u1ea8M \u00c9P NH\u1ef0A<\/span><\/h2>\n
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\"https:\/\/www.aimprocessing.com\/hubfs\/aim-blog-sink-marks.jpg\"<\/div>\n<\/div>\n<\/div>\n
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\"https:\/\/static.wixstatic.com\/media\/801a25_dc10862486ab457383890fb8884ba4a8~mv2.jpg\/v1\/fill\/w_568%2Ch_214%2Cal_c%2Cq_80%2Cusm_0.66_1.00_0.01%2Cenc_avif%2Cquality_auto\/801a25_dc10862486ab457383890fb8884ba4a8~mv2.jpg\"<\/div>\n<\/div>\n<\/div>\n
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\"https:\/\/cdn.goengineer.com\/how-to-minimize-sink-marks-in-ribs-solidworks-plastics.png?format=webp\"<\/div>\n
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\"C\u00e1c<\/span><\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u201cSink\u201d c\u00f3 ngh\u0129a tr\u1ea1ng th\u00e1i b\u1ec1 m\u1eb7t s\u1ea3n ph\u1ea9m b\u1ecb k\u00e9o xu\u1ed1ng v\u00e0 ti\u1ebfn v\u00e0o ph\u00eda trong h\u00ecnh th\u00e0nh n\u00ean m\u1ed9t v\u1ebft l\u00f5m d\u00e0i do s\u1ef1 l\u00e0m l\u1ea1nh, ho\u00e1 r\u1eafn v\u00e0 co ng\u00f3t c\u1ee7a nh\u1ef1a.<\/p>\n

Nguy\u00ean nh\u00e2n ch\u00ednh c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0 <\/span>nh\u1ef1a co c\u1ee9ng trong qu\u00e1 tr\u00ecnh l\u00e0m l\u1ea1nh v\u00e0 h\u00f3a r\u1eafn<\/span><\/strong> , t\u1ea1o ra v\u1eadt li\u1ec7u ph\u00eda sau v\u00e0 k\u00e9o b\u1ec1 m\u1eb7t xu\u1ed1ng t\u1ea1o th\u00e0nh v\u1ebft l\u00f5m.<\/span><\/p>\n

Trong s\u1ea3n xu\u1ea5t, nh\u00e3n ch\u00ecm kh\u00f4ng ch\u1ec9 l\u00e0m <\/span>gi\u1ea3m t\u00ednh th\u1ea9m m\u1ef9<\/span><\/strong> c\u1ee7a s\u1ea3n ph\u1ea9m m\u00e0 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn <\/span>k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t<\/span><\/strong> .<\/span><\/p>\n

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2. Nguy\u00ean nh\u00e2n g\u00e2y ra Sink Mark trong \u00e9p phun<\/span><\/h1>\n

2.1 \u00c1p l\u1ef1c gi\u1eef (Gi\u1eef \u00e1p l\u1ef1c) ch\u01b0a \u0111\u1ee7<\/span><\/h2>\n
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\"https:\/\/www.researchgate.net\/publication\/323311019\/figure\/fig3\/AS%3A865117554089984%401583271506099\/Typical-shrinkage-distribution-to-form-sink-marks.png\"<\/div>\n<\/div>\n<\/div>\n
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\"https:\/\/d2n4wb9orp1vta.cloudfront.net\/cms\/brand\/PT\/2019-PT\/0919ptkhinjection-fig1.jpg%3BmaxWidth%3D1200\"<\/div>\n<\/div>\n<\/div>\n
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\"https:\/\/ars.els-cdn.com\/content\/image\/1-s2.0-S2288430017302002-fx1.jpg\"<\/div>\n
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\u00a0<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Trong qu\u00e1 tr\u00ecnh \u00e9p phun, sau khi nh\u1ef1a \u0111i\u1ec1n \u0111\u1ea7y khu\u00f4n s\u1ebd c\u00f3 <\/span>giai \u0111o\u1ea1n gi\u1eef \u00e1p l\u1ef1c (Giai \u0111o\u1ea1n \u0111\u00f3ng g\u00f3i\/gi\u1eef)<\/span><\/strong> nh\u1eb1m b\u1ed5 sung th\u00eam nh\u1ef1a \u0111\u1ec3 b\u00f9 \u0111\u1eafp s\u1ef1 <\/span>c\u1ee9ng r\u1eafn khi l\u00e0m h\u1ea1n ch\u1ebf<\/span><\/strong> .<\/span><\/p>\n

N\u1ebfu <\/span>\u00e1p d\u1ee5ng kh\u00f4ng \u0111\u1ee7<\/span><\/strong> , v\u1eadt li\u1ec7u s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ed5 sung k\u1ecbp th\u1eddi v\u00e0 d\u1eabn \u0111\u1ebfn <\/span>sink mark<\/span><\/strong> .<\/span><\/p>\n

C\u00e1c c\u1ee5 th\u1ec3 bao g\u1ed3m:<\/span><\/p>\n

1. \u00c1p d\u1ee5ng s\u1ee9c m\u1ea1nh c\u00e0i \u0111\u1eb7t<\/span><\/h3>\n

\u00c1p l\u1ef1c gi\u1eef l\u01b0\u1ee3ng nh\u1ef1a b\u1ed5 sung kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 b\u00f9 \u0111\u1eafp s\u1ef1 c\u1ee9ng r\u1eafn c\u1ee7a v\u1eadt li\u1ec7u.<\/span><\/p>\n

2. \u1ee8ng d\u1ee5ng th\u1eddi gian qu\u00e1 ng\u1eafn<\/span><\/h3>\n

N\u1ebfu <\/span>th\u1eddi gian gi\u1eef nh\u1ecf h\u01a1n th\u1eddi gian ni\u00eam phong c\u1ed5ng<\/span><\/strong> , nh\u1ef1a s\u1ebd kh\u00f4ng th\u1ec3 ti\u1ebfp t\u1ee5c \u1ee9ng d\u1ee5ng v\u00e0o s\u1ea3n ph\u1ea9m.<\/span><\/p>\n

3. C\u1ed5ng k\u00edch th\u01b0\u1edbc qu\u00e1 nh\u1ecf<\/span><\/h3>\n

C\u1ed5ng nh\u1ecf l\u00e0m <\/span>gi\u1ea3m l\u01b0\u1ee3ng nh\u1ef1a b\u1ed5 sung<\/span><\/strong> t\u1ea1o ra vi\u1ec7c l\u00e0m b\u00f9 co c\u1ee9ng mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf.<\/span><\/p>\n

4. Ng\u01b0\u1eddi ch\u1ea1y qu\u00e1<\/span><\/h3>\n

Runner nh\u1ecf l\u00e0m t\u0103ng <\/span>chi ph\u00ed hi\u1ec7u su\u1ea5t<\/span><\/strong> , t\u1ea1o \u00e1p l\u1ef1c gi\u1eef kh\u00f4ng truy\u1ec1n \u0111\u1ebfn s\u1ea3n ph\u1ea9m.<\/span><\/p>\n

5. C\u1ed5ng \u0111\u1ecbnh v\u1ecb kh\u00f4ng h\u1ee3p l\u00fd<\/span><\/h3>\n

N\u00ean \u0111\u1eb7t t\u1ea1i <\/span>v\u00f9ng th\u00e0nh d\u00e0y nh\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m<\/span><\/strong> \u0111\u1ec3 d\u1ec5 d\u00e0ng b\u1ed5 sung nguy\u00ean li\u1ec7u khi co ng\u00f3t.<\/span><\/p>\n

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2.2 T\u1ed1c \u0111\u1ed9 l\u00e0m l\u1ea1nh ch\u1eadm v\u00e0 t\u1ed1c \u0111\u1ed9 l\u1edbn<\/span><\/h2>\n
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\"https:\/\/www.researchgate.net\/publication\/323311019\/figure\/fig3\/AS%3A865117554089984%401583271506099\/Typical-shrinkage-distribution-to-form-sink-marks.png\"<\/div>\n<\/div>\n<\/div>\n
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\"https:\/\/www.nexpcb.com\/hubfs\/shrinkage%20mark.png\"<\/div>\n<\/div>\n<\/div>\n
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\"https:\/\/www.miconmould.com\/static\/upload\/images\/blog\/sink-mark3.jpg\"<\/div>\n<\/div>\n<\/div>\n<\/div>\n

D\u1ea5u ch\u00ecm c\u0169ng th\u01b0\u1eddng x\u1ea3y ra khi:<\/span><\/p>\n