{"id":1436,"date":"2026-08-10T19:32:26","date_gmt":"2026-08-10T19:32:26","guid":{"rendered":"https:\/\/benlongkj.com\/?p=1436"},"modified":"2026-08-10T19:32:29","modified_gmt":"2026-08-10T19:32:29","slug":"hdpe-injection-molding-processing-guide","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/vi\/blog\/hdpe-injection-molding-processing-guide\/","title":{"rendered":"H\u01b0\u1edbng D\u1eabn Quy Tr\u00ecnh \u00c9p Phun HDPE"},"content":{"rendered":"<p>Khi t\u1ea1o m\u1ed9t chi ti\u1ebft m\u1edbi t\u1eeb polyethylene m\u1eadt \u0111\u1ed9 cao (HDPE) \u2014 d\u00f9 l\u00e0 n\u1eafp chai, th\u00f9ng ch\u1ee9a, ph\u1ee5 ki\u1ec7n \u1ed1ng, b\u1ed9 ph\u1eadn b\u1ed3n ch\u1ee9a hay \u0111\u1ed3 gia d\u1ee5ng \u2014 vi\u1ec7c \u0111\u1ea3m b\u1ea3o m\u1ecdi th\u1ee9 ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng. Do t\u00ednh ch\u1ea5t d\u1ec5 d\u00e0ng x\u1eed l\u00fd c\u1ee7a HDPE, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t trong l\u0129nh v\u1ef1c \u0111\u00fac khu\u00f4n (\u0111i\u1ec1u n\u00e0y gi\u1ea3i th\u00edch t\u1ea1i sao n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u s\u1ea3n ph\u1ea9m m\u00e0 ch\u00fang ta s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y). Tuy nhi\u00ean, \u201cd\u1ec5 d\u00e0ng x\u1eed l\u00fd\u201d kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 \u201cho\u00e0n h\u1ea3o\u201d. Th\u1ef1c t\u1ebf, n\u1ebfu nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y, nhi\u1ec7t \u0111\u1ed9 khu\u00f4n ho\u1eb7c \u00e1p su\u1ea5t \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp kh\u00f4ng \u0111\u00fang, b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 l\u00f5m, bi\u1ebfn d\u1ea1ng ho\u1eb7c co r\u00fat, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 kh\u00f3 kh\u1eafc ph\u1ee5c sau \u0111\u00f3. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd tr\u00ecnh b\u00e0y c\u00e1c th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng vi\u1ec7c t\u1ea1o m\u1eabu HDPE: \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u, th\u00f4ng s\u1ed1 m\u00e1y m\u00f3c, c\u00e0i \u0111\u1eb7t quy tr\u00ecnh ho\u00e0n ch\u1ec9nh, h\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 chi ph\u00ed.<\/p>\n<blockquote><p><strong>C\u00e2u tr\u1ea3 l\u1eddi nhanh:<\/strong>\u0110\u00fac khu\u00f4n HDPE b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ti\u00eam \u0111\u01a1n gi\u1ea3n n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c tham s\u1ed1 thi\u1ebft y\u1ebfu: nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y t\u1eeb 200\u2013280\u00b0C (t\u1ed1i \u01b0u 220\u00b0C), nhi\u1ec7t \u0111\u1ed9 khu\u00f4n t\u1eeb 20\u201370\u00b0C (l\u00fd t\u01b0\u1edfng 40\u201360\u00b0C), \u00e1p su\u1ea5t ti\u00eam t\u1eeb 70\u2013140 MPa, \u00e1p su\u1ea5t gi\u1eef (40\u201360% \u00e1p su\u1ea5t ti\u00eam), v\u00e0 v\u00edt ti\u00eau chu\u1ea9n 3 \u0111o\u1ea1n v\u1edbi t\u1ef7 l\u1ec7 L\/D l\u00e0 25:1. Th\u00f4ng th\u01b0\u1eddng, kh\u00f4ng c\u1ea7n s\u1ea5y tr\u01b0\u1edbc (HDPE h\u1ea5p th\u1ee5 \u00edt h\u01a1n 0.01%), nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 s\u1ea5y b\u1eb1ng c\u00e1ch gia nhi\u1ec7t \u1edf 80\u00b0C trong 1 gi\u1edd n\u1ebfu v\u1eadt li\u1ec7u b\u1ecb \u1ea9m. T\u1ef7 l\u1ec7 co r\u00fat l\u00e0 m\u1ed9t tham s\u1ed1 r\u1ea5t quan tr\u1ecdng v\u00ec HDPE co r\u00fat t\u1eeb 1.5\u20133.5%, v\u00e0 v\u00ec \u0111\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng t\u1ef7 l\u1ec7 cao nh\u1ea5t trong t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i nh\u1ef1a, n\u00ean vi\u1ec7c b\u00f9 tr\u1eeb khoang khu\u00f4n v\u00e0 duy tr\u00ec \u0111\u1ed9 d\u00e0y th\u00e0nh \u0111\u1ec1u l\u00e0 r\u1ea5t quan tr\u1ecdng. Th\u1eddi gian chu tr\u00ecnh l\u00e0m m\u00e1t t\u1eeb 10 \u0111\u1ebfn 30 gi\u00e2y cho m\u1ed7i milim\u00e9t \u0111\u1ed9 d\u00e0y th\u00e0nh. HDPE c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ed1c \u0111\u1ed9 v\u00edt cao h\u01a1n, c\u00f3 hi\u1ec7u su\u1ea5t t\u1ed1t trong vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u nghi\u1ec1n l\u1ea1i 100%, v\u00e0 kh\u00f4ng c\u00f3 quy tr\u00ecnh \u0111\u1eb7c bi\u1ec7t n\u00e0o cho vi\u1ec7c l\u00e0m s\u1ea1ch khi t\u1eaft m\u00e1y.<\/p><\/blockquote>\n<h2>HDPE l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao l\u1ea1i \u0111\u00fac khu\u00f4n n\u00f3?<\/h2>\n<p>Polyethylene m\u1eadt \u0111\u1ed9 cao (HDPE) l\u00e0 m\u1ed9t lo\u1ea1i nh\u1ef1a nhi\u1ec7t d\u1ebbo \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb ethylene c\u00f3 t\u00ednh ch\u1ea5t b\u00e1n tinh th\u1ec3. Do \u0111\u00f3, HDPE c\u00f3 r\u1ea5t \u00edt nh\u00e1nh ph\u00e2n t\u1eed, ngh\u0129a l\u00e0 n\u00f3 c\u00f3 c\u1ea5u tr\u00fac ch\u1eb7t ch\u1ebd v\u00e0 \u0111\u1eb7c. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao n\u00f3 c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ea5u tr\u00fac tuy\u1ec7t v\u1eddi, nh\u01b0 t\u1ef7 l\u1ec7 c\u01b0\u1eddng \u0111\u1ed9 tr\u00ean tr\u1ecdng l\u01b0\u1ee3ng cao, kh\u1ea3 n\u0103ng ch\u1ed1ng h\u00f3a ch\u1ea5t t\u1ed1t, v\u00e0 t\u1ef7 l\u1ec7 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m th\u1ea5p.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1437\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/08\/What-Is-HDPE-and-Why-Mold-It.webp\" alt=\"HDPE l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao l\u1ea1i \u0111\u00fac n\u00f3\" width=\"1448\" height=\"1086\" \/><\/p>\n<p>L\u00fd do ch\u1ecdn HDPE trong \u0111\u00fac khu\u00f4n ti\u00eam:<\/p>\n<ul>\n<li>Chi ph\u00ed th\u1ea5p \u2014 l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i nh\u1ef1a c\u00f3 gi\u00e1 th\u00e0nh th\u1ea5p nh\u1ea5t theo tr\u1ecdng l\u01b0\u1ee3ng<\/li>\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng h\u00f3a ch\u1ea5t tuy\u1ec7t v\u1eddi \u2014 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c h\u1ea7u h\u1ebft c\u00e1c axit v\u00e0 baz\u01a1, c\u1ed3n v\u00e0 d\u1ea7u \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng<\/li>\n<li>\u0110\u1ed9 b\u1ec1n va \u0111\u1eadp xu\u1ea5t s\u1eafc \u2014 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c va \u0111\u1eadp v\u00e0 x\u1eed l\u00fd th\u00f4 b\u1ea1o<\/li>\n<li>C\u00e1c lo\u1ea1i \u0111\u01b0\u1ee3c FDA ph\u00ea duy\u1ec7t \u2014 ho\u00e0n h\u1ea3o cho bao b\u00ec th\u1ef1c ph\u1ea9m, s\u1ea3n ph\u1ea9m ti\u1ebfp x\u00fac v\u1edbi th\u1ef1c ph\u1ea9m, v.v.<\/li>\n<li>T\u00ednh b\u1ec1n v\u1eefng \u2014 c\u00f3 th\u1ec3 t\u00e1i ch\u1ebf\/h\u00e0ng tr\u0103m l\u1ea7n nghi\u1ec1n l\u1ea1i \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t<\/li>\n<li>D\u1ec5 s\u1ea3n xu\u1ea5t v\u00e0 x\u1eed l\u00fd \u2014 d\u1ec5 d\u00e0ng qua quy tr\u00ecnh \u0111\u00fac khu\u00f4n ti\u00eam<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n m\u1edbi b\u1eaft \u0111\u1ea7u x\u00e2y d\u1ef1ng khu\u00f4n cho c\u00e1c b\u1ed9 ph\u1eadn nh\u1ef1a, vi\u1ec7c hi\u1ec3u c\u00e1ch thi\u1ebft k\u1ebf v\u00e0 ph\u00e1t tri\u1ec3n khu\u00f4n l\u00e0 \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft \u2014 h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/benlongkj.com\/vi\/blog\/mcb-injection-mold-development-process\/\">quy tr\u00ecnh ph\u00e1t tri\u1ec3n khu\u00f4n ti\u00eam<\/a> bao g\u1ed3m to\u00e0n b\u1ed9 h\u00e0nh tr\u00ecnh t\u1eeb thi\u1ebft k\u1ebf \u0111\u1ebfn th\u1eed nghi\u1ec7m.<\/p>\n<hr \/>\n<h2>\u0110\u1eb7c t\u00ednh v\u1eadt li\u1ec7u HDPE \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c \u0111\u00fac khu\u00f4n<\/h2>\n<table>\n<thead>\n<tr>\n<th>Thu\u1ed9c t\u00ednh<\/th>\n<th>Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c \u0111\u00fac khu\u00f4n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1eadt \u0111\u1ed9<\/td>\n<td>0,93\u20130,97 g\/cm\u00b3<\/td>\n<td>M\u1eadt \u0111\u1ed9 cao h\u01a1n = \u0111\u1ed9 b\u1ec1n v\u00e0 co r\u00fat cao h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ec9 s\u1ed1 d\u00f2ng ch\u1ea3y n\u00f3ng ch\u1ea3y (MFI)<\/td>\n<td>0,1\u201328 g\/10 ph\u00fat<\/td>\n<td>MFI th\u1ea5p = kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp t\u1ed1t h\u01a1n nh\u01b0ng d\u00f2ng ch\u1ea3y kh\u00f3 h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/td>\n<td>120\u2013135\u00b0C<\/td>\n<td>X\u00e1c \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 x\u1eed l\u00fd t\u1ed1i thi\u1ec3u<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td>\n<td>20\u201337 MPa<\/td>\n<td>Hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td>H\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/td>\n<td>&lt; 0,01%<\/td>\n<td><strong>Th\u00f4ng th\u01b0\u1eddng kh\u00f4ng c\u1ea7n s\u1ea5y tr\u01b0\u1edbc<\/strong><\/td>\n<\/tr>\n<tr>\n<td>T\u00ednh k\u1ebft tinh<\/td>\n<td>60\u201380%<\/td>\n<td>L\u00e0m ngu\u1ed9i ch\u1eadm, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn co r\u00fat v\u00e0 bi\u1ebfn d\u1ea1ng<\/td>\n<\/tr>\n<tr>\n<td>Co r\u00fat khu\u00f4n<\/td>\n<td>1,5\u20133,5%<\/td>\n<td><strong>Cao nh\u1ea5t trong s\u1ed1 c\u00e1c lo\u1ea1i nh\u1ef1a th\u00f4ng d\u1ee5ng<\/strong> \u2014 thi\u1ebft k\u1ebf khu\u00f4n ph\u00f9 h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng ch\u1ed1ng tia UV<\/td>\n<td>K\u00e9m n\u1ebfu kh\u00f4ng c\u00f3 ch\u1ea5t ph\u1ee5 gia<\/td>\n<td>Th\u00eam ch\u1ea5t \u1ed5n \u0111\u1ecbnh UV cho s\u1ea3n ph\u1ea9m ngo\u00e0i tr\u1eddi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u00f3 hai \u0111\u1eb7c t\u00ednh thi\u1ebft y\u1ebfu c\u1ee7a nh\u1ef1a: MFI v\u00e0 co r\u00fat. C\u00e1c lo\u1ea1i MFI th\u1ea5p (tr\u1ecdng l\u01b0\u1ee3ng ph\u00e2n t\u1eed l\u1edbn) th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp v\u00e0 ch\u1ed1ng n\u1ee9t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd v\u01b0\u1ee3t tr\u1ed9i nh\u01b0ng y\u00eau c\u1ea7u nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t x\u1eed l\u00fd cao h\u01a1n. C\u00e1c lo\u1ea1i MFI cao ch\u1ea3y t\u1ed1t v\u00e0 c\u00f3 th\u1ec3 l\u1ea5p \u0111\u1ea7y c\u00e1c chi ti\u1ebft m\u1ecfng, nh\u01b0ng kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c gi\u1ea3m. L\u1ef1a ch\u1ecdn lo\u1ea1i nh\u1ef1a d\u1ef1a tr\u00ean ch\u1ee9c n\u0103ng c\u1ee7a chi ti\u1ebft nh\u1ef1a, thay v\u00ec chi ph\u00ed.<\/p>\n<hr \/>\n<h2>Thi\u1ebft b\u1ecb &amp; C\u00e0i \u0111\u1eb7t m\u00e1y c\u1ea7n thi\u1ebft<\/h2>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1438\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/08\/Required-Equipment-Machine-Setup-Injection-Molding-Machine.webp\" alt=\"Thi\u1ebft b\u1ecb c\u1ea7n thi\u1ebft &amp; C\u00e0i \u0111\u1eb7t m\u00e1y M\u00e1y \u0111\u00fac phun\" width=\"1448\" height=\"1086\" \/><\/p>\n<h3>M\u00e1y \u00e9p phun<\/h3>\n<p>M\u00e1y \u00e9p phun ti\u00eau chu\u1ea9n x\u1eed l\u00fd HDPE m\u00e0 kh\u00f4ng c\u1ea7n ch\u1ec9nh s\u1eeda. C\u1ea5u h\u00ecnh \u0111\u1ec1 xu\u1ea5t:<\/p>\n<table>\n<thead>\n<tr>\n<th>Th\u00e0nh ph\u1ea7n<\/th>\n<th>S\u1ef1 gi\u1edbi thi\u1ec7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tr\u1ee5c v\u00edt<\/td>\n<td>Tr\u1ee5c v\u00edt \u0111a n\u0103ng 3 \u0111o\u1ea1n ti\u00eau chu\u1ea9n (n\u1ea1p\/ n\u00e9n\/ \u0111o l\u01b0\u1eddng)<\/td>\n<\/tr>\n<tr>\n<td>T\u1ef7 l\u1ec7 L\/D tr\u1ee5c v\u00edt<\/td>\n<td>25:1 (ph\u1ea7n tr\u1ed9n ho\u1eb7c c\u1eaft x\u00e9n t\u00f9y ch\u1ecdn cho bao b\u00ec)<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u phun<\/td>\n<td>\u0110\u1ea7u phun th\u1eb3ng c\u00f3 van \u0111\u00f3ng<\/td>\n<\/tr>\n<tr>\n<td>Van m\u1ed9t chi\u1ec1u (kh\u00f4ng h\u1ed3i l\u01b0u)<\/td>\n<td>C\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u0103n ch\u1ea3y ng\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh \u00e9p phun<\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc phun<\/td>\n<td>S\u1eed d\u1ee5ng 35\u201365% dung t\u00edch phun c\u1ee7a m\u00e1y \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 \u0111\u1ed3ng nh\u1ea5t n\u00f3ng ch\u1ea3y t\u1ed1t nh\u1ea5t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Khu\u00f4n \/ D\u1ee5ng c\u1ee5<\/h3>\n<ul>\n<li>C\u1eeda d\u1eabn: C\u00e1c lo\u1ea1i c\u1eeda d\u1eabn \u0111\u1ec1u \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c. C\u1eeda d\u1eabn ch\u1ed1t, b\u1ed9 d\u1eabn n\u00f3ng c\u00f3 gia nhi\u1ec7t ho\u1eb7c c\u00e1ch nhi\u1ec7t c\u0169ng nh\u01b0 c\u1eeda d\u1eabn trong l\u00e0 ho\u00e0n h\u1ea3o \u0111\u1ec3 l\u00e0m s\u1ea3n ph\u1ea9m th\u00e0nh m\u1ecfng. Chi\u1ec1u d\u00e0i c\u1eeda d\u1eabn kh\u00f4ng n\u00ean v\u01b0\u1ee3t qu\u00e1 0,75 mm.<\/li>\n<li>R\u00e3nh d\u1eabn: \u0110\u01b0\u1eddng k\u00ednh n\u00ean t\u1eeb 4 \u0111\u1ebfn 7,5 mm (th\u01b0\u1eddng kho\u1ea3ng 6 mm), nh\u01b0ng n\u00ean ng\u1eafn nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ec3 tr\u00e1nh m\u1ea5t \u00e1p su\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m v\u1eadt li\u1ec7u.<\/li>\n<li>K\u00eanh l\u00e0m m\u00e1t: \u0110\u01b0\u1eddng k\u00ednh kh\u00f4ng nh\u1ecf h\u01a1n 8 mm v\u00e0 n\u00ean \u0111\u1eb7t c\u00e1ch b\u1ec1 m\u1eb7t khu\u00f4n t\u1ed1i \u0111a 1,3\u00d7 \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ec3 cung c\u1ea5p l\u00e0m m\u00e1t \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 gi\u1ea3m sai l\u1ec7ch co r\u00fat.<\/li>\n<li>L\u1ed7 tho\u00e1t kh\u00ed: L\u1ed7 tho\u00e1t kh\u00ed ph\u00f9 h\u1ee3p (t\u1eeb 0,01 \u2013 0,02 mm) s\u1ebd gi\u00fap tr\u00e1nh v\u1ebft ch\u00e1y v\u00e0 thi\u1ebfu \u0111\u1ea7y khi \u0111\u1ed5 khu\u00f4n.<\/li>\n<li>\u0110\u1ea9y s\u1ea3n ph\u1ea9m: HDPE c\u00f3 \u0111\u1ed9 b\u00e1m d\u00ednh r\u1ea5t th\u1ea5p v\u1edbi khu\u00f4n, ngh\u0129a l\u00e0 c\u00e1c ch\u1ed1t \u0111\u1ea9y th\u00f4ng th\u01b0\u1eddng l\u00e0 \u0111\u1ee7; \u0111\u1ed1i v\u1edbi c\u00e1c chi ti\u1ebft s\u00e2u, s\u1eed d\u1ee5ng t\u1ea5m t\u00e1ch.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1ch ch\u1ebf t\u1ea1o khu\u00f4n \u00e9p ch\u00ednh x\u00e1c, b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/benlongkj.com\/vi\/blog\/mcb-injection-mold-manufacture\/\">s\u1ea3n xu\u1ea5t khu\u00f4n \u00e9p<\/a> gi\u1ea3i th\u00edch c\u00e1c giai \u0111o\u1ea1n gia c\u00f4ng, \u0111\u00e1nh b\u00f3ng v\u00e0 l\u1eafp r\u00e1p.<\/p>\n<hr \/>\n<h2>Tham s\u1ed1 x\u1eed l\u00fd ho\u00e0n ch\u1ec9nh<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c tham s\u1ed1 \u00e9p phun HDPE \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t. B\u1eaft \u0111\u1ea7u v\u1edbi gi\u00e1 tr\u1ecb \u0111i\u1ec3m gi\u1eefa \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb v\u00e0 \u0111i\u1ec1u ch\u1ec9nh d\u1ef1a tr\u00ean ch\u1ea5t l\u01b0\u1ee3ng chi ti\u1ebft.<\/p>\n<h3>C\u00e0i \u0111\u1eb7t nhi\u1ec7t \u0111\u1ed9<\/h3>\n<table>\n<thead>\n<tr>\n<th>V\u00f9ng<\/th>\n<th>Ph\u1ea1m vi \u0111\u1ec1 xu\u1ea5t<\/th>\n<th>\u0110i\u1ec3m b\u1eaft \u0111\u1ea7u \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>V\u00f9ng n\u1ea1p (ph\u1ec5u)<\/td>\n<td>30\u201350\u00b0C<\/td>\n<td>40\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>V\u00f9ng th\u00f9ng 1<\/td>\n<td>160\u2013250\u00b0C<\/td>\n<td>200\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>V\u00f9ng th\u00f9ng 2<\/td>\n<td>200\u2013300\u00b0C<\/td>\n<td>220\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>V\u00f9ng th\u00f9ng 3\u20135<\/td>\n<td>220\u2013300\u00b0C<\/td>\n<td>230\u2013240\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u phun<\/td>\n<td>220\u2013300\u00b0C<\/td>\n<td>240\u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y<\/strong><\/td>\n<td><strong>180\u2013280\u00b0C<\/strong><\/td>\n<td><strong>220\u00b0C<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Nhi\u1ec7t \u0111\u1ed9 khu\u00f4n<\/strong><\/td>\n<td><strong>20\u201370\u00b0C<\/strong><\/td>\n<td><strong>40\u201360\u00b0C<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Quan s\u00e1t nhi\u1ec7t \u0111\u1ed9: Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y cao t\u0103ng c\u01b0\u1eddng d\u00f2ng ch\u1ea3y nh\u01b0ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn kh\u1ea3 n\u0103ng ph\u00e2n h\u1ee7y nhi\u1ec7t (v\u00e0ng, m\u00f9i v\u00e0 m\u1ea5t t\u00ednh n\u0103ng s\u1ea3n ph\u1ea9m). Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p s\u1ebd g\u00e2y ra c\u00e1c l\u1ea7n b\u01a1m kh\u00f4ng ho\u00e0n ch\u1ec9nh v\u00e0 b\u1ec1 m\u1eb7t k\u00e9m. C\u00e1c lo\u1ea1i MW cao c\u1ea7n x\u1eed l\u00fd \u1edf 200\u2013250\u00b0C. Vui l\u00f2ng s\u1eed d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n n\u1ebfu \u0111\u1ed9 d\u00e0y th\u00e0nh v\u01b0\u1ee3t qu\u00e1 6 mm; n\u1ebfu d\u01b0\u1edbi 6 mm, s\u1eed d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n.<\/p>\n<h3>C\u00e0i \u0111\u1eb7t \u00e1p su\u1ea5t &amp; t\u1ed1c \u0111\u1ed9<\/h3>\n<table>\n<thead>\n<tr>\n<th>Tham s\u1ed1<\/th>\n<th>Ph\u1ea1m vi \u0111\u1ec1 xu\u1ea5t<\/th>\n<th>Ghi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u00c1p su\u1ea5t ti\u00eam<\/td>\n<td>70\u2013140 MPa (l\u00ean \u0111\u1ebfn 180 MPa cho bao b\u00ec th\u00e0nh m\u1ecfng)<\/td>\n<td>\u0110\u1ed9 nh\u1edbt th\u1ea5p c\u1ee7a HDPE th\u01b0\u1eddng cho ph\u00e9p \u00e1p su\u1ea5t th\u1ea5p h\u01a1n so v\u1edbi nh\u1ef1a k\u1ef9 thu\u1eadt<\/td>\n<\/tr>\n<tr>\n<td>\u00c1p su\u1ea5t gi\u1eef<\/td>\n<td>40\u201360 MPa \u00e1p su\u1ea5t ti\u00eam<\/td>\n<td>\u00c1p d\u1ee5ng cho 50\u201380 gi\u00e2y t\u1ed5ng th\u1eddi gian l\u00e0m m\u00e1t; th\u1eddi gian gi\u1eef l\u00e2u ki\u1ec3m so\u00e1t co r\u00fat<\/td>\n<\/tr>\n<tr>\n<td>\u00c1p su\u1ea5t ng\u01b0\u1ee3c<\/td>\n<td>5\u201320 MPa<\/td>\n<td>C\u1ea3i thi\u1ec7n \u0111\u1ed9 \u0111\u1ed3ng nh\u1ea5t c\u1ee7a ch\u1ea3y v\u00e0 tr\u1ed9n m\u00e0u<\/td>\n<\/tr>\n<tr>\n<td>T\u1ed1c \u0111\u1ed9 ti\u00eam<\/td>\n<td>Khuy\u1ebfn ngh\u1ecb cao; t\u1ed1c \u0111\u1ed9 theo h\u1ed3 s\u01a1 cho c\u00e1c b\u1ed9 ph\u1eadn l\u1edbn<\/td>\n<td>T\u1ed1c \u0111\u1ed9 cao l\u1ea5p \u0111\u1ea7y th\u00e0nh m\u1ecfng; t\u1ed1c \u0111\u1ed9 theo h\u1ed3 s\u01a1 gi\u1ea3m bi\u1ebfn d\u1ea1ng tr\u00ean c\u00e1c b\u1ed9 ph\u1eadn ph\u1eb3ng l\u1edbn<\/td>\n<\/tr>\n<tr>\n<td>T\u1ed1c \u0111\u1ed9 v\u00edt<\/td>\n<td>Cho ph\u00e9p cao (t\u1ed1c \u0111\u1ed9 tuy\u1ebfn t\u00ednh l\u00ean \u0111\u1ebfn 1.3 m\/s)<\/td>\n<td>Y\u00eau c\u1ea7u m\u00f4-men xo\u1eafn th\u1ea5p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e0i \u0111\u1eb7t chu k\u1ef3 &amp; th\u1eddi gian<\/h3>\n<table>\n<thead>\n<tr>\n<th>Tham s\u1ed1<\/th>\n<th>Gi\u00e1 tr\u1ecb khuy\u1ebfn ngh\u1ecb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc phun (h\u00e0nh tr\u00ecnh \u0111o)<\/td>\n<td>5\u20134 D (\u0111\u01b0\u1eddng k\u00ednh v\u00edt); s\u1eed d\u1ee5ng ~4D \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u1eddi gian l\u01b0u ch\u1ea3y \u0111\u1ee7<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ec7m (dung t\u00edch ch\u1ea3y c\u00f2n l\u1ea1i)<\/td>\n<td>2\u20138 mm<\/td>\n<\/tr>\n<tr>\n<td>Th\u1eddi gian l\u00e0m m\u00e1t<\/td>\n<td>10\u201330 gi\u00e2y cho m\u1ed7i mm \u0111\u1ed9 d\u00e0y th\u00e0nh<\/td>\n<\/tr>\n<tr>\n<td>T\u1ed5ng th\u1eddi gian chu k\u1ef3<\/td>\n<td>20\u201360 gi\u00e2y \u0111i\u1ec3n h\u00ecnh<\/td>\n<\/tr>\n<tr>\n<td>S\u1eed d\u1ee5ng nguy\u00ean li\u1ec7u t\u00e1i ch\u1ebf<\/td>\n<td>L\u00ean \u0111\u1ebfn 100% (duy tr\u00ec t\u1ef7 l\u1ec7 pha tr\u1ed9n \u0111\u1ed3ng nh\u1ea5t)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Co r\u00fat &amp; Quy t\u1eafc thi\u1ebft k\u1ebf khu\u00f4n<\/h2>\n<p>V\u1edbi HDPE, co r\u00fat l\u00e0 th\u00e1ch th\u1ee9c thi\u1ebft k\u1ebf ch\u00ednh. Co r\u00fat c\u1ee7a HDPE l\u00e0 1.5\u20133.5%, l\u1edbn h\u01a1n h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i nh\u1ef1a th\u00f4ng d\u1ee5ng kh\u00e1c (co r\u00fat c\u1ee7a PP kho\u1ea3ng 1.2\u20132.5% v\u00e0 c\u1ee7a ABS ch\u1ec9 0.4\u20130.7%). Nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea3i c\u00e2n nh\u1eafc \u0111i\u1ec1u n\u00e0y v\u00e0 l\u00e0m khu\u00f4n l\u1edbn h\u01a1n chi ti\u1ebft ho\u00e0n thi\u1ec7n.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1439\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/08\/Shrinkage-Mold-Design-Rules.webp\" alt=\"Co r\u00fat &amp; Quy t\u1eafc thi\u1ebft k\u1ebf khu\u00f4n\" width=\"1448\" height=\"1086\" \/><\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 l\u00e0m t\u0103ng co r\u00fat<\/h3>\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y cao h\u01a1n<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 khu\u00f4n cao h\u01a1n (l\u00e0m m\u00e1t ch\u1eadm = k\u1ebft tinh nhi\u1ec1u h\u01a1n)<\/li>\n<li>Th\u00e0nh d\u00e0y h\u01a1n<\/li>\n<li>\u00c1p su\u1ea5t gi\u1eef th\u1ea5p \/ th\u1eddi gian gi\u1eef ng\u1eafn<\/li>\n<li>C\u00e1c lo\u1ea1i c\u00f3 \u0111\u1ed9 k\u1ebft tinh cao<\/li>\n<\/ul>\n<h3>Quy t\u1eafc thi\u1ebft k\u1ebf \u0111\u1ec3 ki\u1ec3m so\u00e1t co r\u00fat &amp; bi\u1ebfn d\u1ea1ng<\/h3>\n<ul>\n<li>Duy tr\u00ec \u0111\u1ed9 d\u00e0y th\u00e0nh \u0111\u1ed3ng \u0111\u1ec1u: s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn v\u1ec1 \u0111\u1ed9 d\u00e0y th\u00e0nh d\u1eabn \u0111\u1ebfn co r\u00fat v\u00e0 bi\u1ebfn d\u1ea1ng kh\u00f4ng \u0111\u1ec1u c\u1ee7a chi ti\u1ebft. T\u1ef7 l\u1ec7 L\/D l\u00fd t\u01b0\u1edfng c\u1ee7a d\u00f2ng ch\u1ea3y l\u00e0 t\u1eeb 50:1 \u0111\u1ebfn 100:1.<\/li>\n<li>\u0110i\u1ec1u ch\u1ec9nh khoang: thi\u1ebft k\u1ebf khu\u00f4n ph\u1ea3i x\u1eed l\u00fd co r\u00fat \u1edf t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n (gi\u00e1 tr\u1ecb co r\u00fat c\u00f3 th\u1ec3 do nh\u00e0 cung c\u1ea5p nh\u1ef1a cung c\u1ea5p, v\u00ed d\u1ee5 0.018 mm\/mm).<\/li>\n<li>Duy tr\u00ec ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u: h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ph\u1ea3i cung c\u1ea5p l\u00e0m m\u00e1t \u0111\u1ec1u cho c\u1ea3 v\u00f9ng d\u00e0y v\u00e0 m\u1ecfng c\u1ee7a chi ti\u1ebft tr\u00e1nh co r\u00fat x\u1ea3y ra \u1edf c\u00e1c v\u00f9ng kh\u00e1c nhau.<\/li>\n<li>Duy tr\u00ec \u00e1p su\u1ea5t th\u00edch h\u1ee3p trong giai \u0111o\u1ea1n gi\u1eef: r\u1ea5t quan tr\u1ecdng t\u1ea1o \u00e1p su\u1ea5t trong giai \u0111o\u1ea1n gi\u1eef khi s\u1ea3n xu\u1ea5t HDPE; \u00e1p su\u1ea5t n\u00ean b\u1eb1ng 50-80% th\u1eddi gian l\u00e0m m\u00e1t.<\/li>\n<li>S\u1eed d\u1ee5ng x\u1eed l\u00fd nhi\u1ec7t sau khu\u00f4n (n\u1ebfu c\u1ea7n): c\u00e1c chi ti\u1ebft c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao ph\u1ea3i \u0111\u01b0\u1ee3c nung \u1edf 80-100 \u0111\u1ed9 C trong kho\u1ea3ng 30-60 ph\u00fat \u0111\u1ec3 gi\u1ea3m \u00e1p su\u1ea5t b\u00ean trong v\u00e0 \u1ed5n \u0111\u1ecbnh k\u1ebft tinh.<\/li>\n<li>Tr\u00e1nh c\u00e1c c\u1ea1nh s\u1eafc khi thi\u1ebft k\u1ebf khu\u00f4n: b\u00e1n k\u00ednh l\u1edbn n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf nh\u1eefng n\u01a1i c\u00f3 \u00e1p su\u1ea5t cao \u0111\u1ec3 lo\u1ea1i b\u1ecf t\u1eadp trung \u1ee9ng su\u1ea5t.<\/li>\n<\/ul>\n<p>\u01af\u1edbc l\u01b0\u1ee3ng dung sai cho HDPE t\u1eeb \u00b10,05 mm \u0111\u1ebfn \u00b10,2 mm (ki\u1ec3m so\u00e1t co r\u00fat quan tr\u1ecdng h\u01a1n \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a m\u00e1y).<\/p>\n<hr \/>\n<h2>C\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn &amp; C\u00e1ch kh\u1eafc ph\u1ee5c<\/h2>\n<table>\n<thead>\n<tr>\n<th>L\u1ed7i<\/th>\n<th>Nguy\u00ean nh\u00e2n<\/th>\n<th>Kh\u1eafc ph\u1ee5c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>V\u1ebft l\u00f5m<\/strong><\/td>\n<td>\u00c1p l\u1ef1c gi\u1eef kh\u00f4ng \u0111\u1ee7 ho\u1eb7c th\u1eddi gian gi\u1eef ng\u1eafn; c\u00e1c ph\u1ea7n d\u00e0y<\/td>\n<td>T\u0103ng \u00e1p l\u1ef1c\/th\u1eddi gian gi\u1eef; th\u00eam g\u00e2n; gi\u1ea3m \u0111\u1ed9 d\u00e0y th\u00e0nh; \u0111\u1eb7t c\u1eeda phun t\u1ea1i c\u00e1c \u0111i\u1ec3m d\u00e0y nh\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td><strong>Cong v\u00eanh \/ bi\u1ebfn d\u1ea1ng<\/strong><\/td>\n<td>Co r\u00fat kh\u00e1c bi\u1ec7t; l\u00e0m m\u00e1t kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u; \u0111\u1ed9 k\u1ebft tinh cao<\/td>\n<td>C\u00e2n b\u1eb1ng \u0111\u1ed9 d\u00e0y th\u00e0nh; c\u1ea3i thi\u1ec7n b\u1ed1 tr\u00ed k\u00eanh l\u00e0m m\u00e1t; \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 phun; gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 khu\u00f4n<\/td>\n<\/tr>\n<tr>\n<td><strong>Phun thi\u1ebfu (kh\u00f4ng \u0111\u1ea7y khu\u00f4n)<\/strong><\/td>\n<td>Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y th\u1ea5p; \u00e1p l\u1ef1c phun th\u1ea5p; c\u1eeda phun b\u1ecb h\u1ea1n ch\u1ebf; kh\u00f4ng kh\u00ed b\u1ecb k\u1eb9t<\/td>\n<td>T\u0103ng nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y; t\u0103ng \u00e1p l\u1ef1c\/t\u1ed1c \u0111\u1ed9 phun; m\u1edf r\u1ed9ng c\u1eeda phun; th\u00eam l\u1ed7 tho\u00e1t kh\u00ed<\/td>\n<\/tr>\n<tr>\n<td><strong>Bavia (g\u1edd nh\u00f4)<\/strong><\/td>\n<td>\u00c1p l\u1ef1c phun qu\u00e1 cao; \u0111\u01b0\u1eddng ph\u00e2n khu\u00f4n m\u00f2n; l\u1ef1c k\u1eb9p qu\u00e1 th\u1ea5p<\/td>\n<td>Gi\u1ea3m \u00e1p l\u1ef1c phun; t\u0103ng l\u1ef1c k\u1eb9p; s\u1eeda ch\u1eefa b\u1ec1 m\u1eb7t khu\u00f4n; ki\u1ec3m tra \u0111\u1ed9 s\u00e2u l\u1ed7 tho\u00e1t kh\u00ed<\/td>\n<\/tr>\n<tr>\n<td><strong>V\u1ebft ch\u00e1y<\/strong><\/td>\n<td>Kh\u00f4ng kh\u00ed b\u1ecb n\u00e9n cu\u1ed1i qu\u00e1 tr\u00ecnh phun (\u201chi\u1ec7u \u1ee9ng diesel\u201d)<\/td>\n<td>Th\u00eam ho\u1eb7c l\u00e0m s\u00e2u l\u1ed7 tho\u00e1t kh\u00ed; gi\u1ea3m t\u1ed1c \u0111\u1ed9 phun g\u1ea7n cu\u1ed1i qu\u00e1 tr\u00ecnh phun<\/td>\n<\/tr>\n<tr>\n<td><strong>V\u1ec7t b\u1ea1c \/ v\u1ec7t s\u1ecdc<\/strong><\/td>\n<td>\u0110\u1ed9 \u1ea9m ho\u1eb7c t\u1ea1p ch\u1ea5t trong v\u1eadt li\u1ec7u (hi\u1ebfm v\u1edbi HDPE)<\/td>\n<td>S\u1ea5y \u1edf 80\u00b0C trong 1 gi\u1edd n\u1ebfu \u1ea9m; l\u00e0m s\u1ea1ch th\u00f9ng phun; ki\u1ec3m tra \u0111\u1ed9 s\u1ea1ch c\u1ee7a v\u1eadt li\u1ec7u t\u00e1i ch\u1ebf<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110\u01b0\u1eddng h\u00e0n (\u0111i\u1ec3m y\u1ebfu)<\/strong><\/td>\n<td>C\u00e1c d\u00f2ng n\u00f3ng ch\u1ea3y g\u1eb7p nhau quanh ch\u00e8n ho\u1eb7c l\u00f5i<\/td>\n<td>T\u0103ng nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y; t\u0103ng t\u1ed1c \u0111\u1ed9 phun; thay \u0111\u1ed5i v\u1ecb tr\u00ed c\u1eeda phun; th\u00eam gi\u1ebfng tr\u00e0n<\/td>\n<\/tr>\n<tr>\n<td><strong>D\u00ednh trong khoang khu\u00f4n<\/strong><\/td>\n<td>\u0110\u00f3ng g\u00f3i qu\u00e1 m\u1ee9c; g\u00f3c nghi\u00eang kh\u00f4ng \u0111\u1ee7<\/td>\n<td>Gi\u1ea3m \u00e1p l\u1ef1c gi\u1eef; t\u0103ng g\u00f3c nghi\u00eang; th\u00eam ch\u1ed1t \u0111\u1ea9y ho\u1eb7c t\u1ea5m t\u00e1ch<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>N\u1ebfu b\u1ea1n \u0111ang x\u1eed l\u00fd c\u00e1c l\u1ed7i ph\u1ee9c t\u1ea1p h\u01a1n nh\u01b0 k\u1ebft d\u00ednh k\u00e9m ho\u1eb7c t\u1ea1p ch\u1ea5t, h\u01b0\u1edbng d\u1eabn <a href=\"https:\/\/benlongkj.com\/vi\/blog\/overmolding-troubleshooting\/\">kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u00e9p ph\u1ee7 c\u1ee7a ch\u00fang t\u00f4i<\/a> bao g\u1ed3m ch\u1ea9n \u0111o\u00e1n l\u1ed7i cho c\u00e1c b\u1ed9 ph\u1eadn \u0111a v\u1eadt li\u1ec7u, bao g\u1ed3m l\u1ed7i k\u1ebft d\u00ednh v\u00e0 t\u1ea1p nhi\u1ec5m m\u00e0u s\u1eafc.<\/p>\n<hr \/>\n<h2>Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho s\u1ea3n xu\u1ea5t \u1ed5n \u0111\u1ecbnh<\/h2>\n<ul>\n<li><span style=\"color: #ff0000;\">B\u1ea3o tr\u00ec \u0111\u1ed9 s\u1ea1ch c\u1ee7a v\u1eadt li\u1ec7u:<\/span> M\u1eb7c d\u00f9 HDPE kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0111\u1ed9 \u1ea9m, n\u00f3 v\u1eabn d\u1ec5 b\u1ecb b\u1ee5i v\u00e0 t\u1ea1p ch\u1ea5t. Th\u1ef1c h\u00e0nh l\u01b0u tr\u1eef t\u1ed1t l\u00e0 ni\u00eam phong trong t\u00fai c\u0169ng nh\u01b0 s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u00e1i ch\u1ebf s\u1ea1ch v\u00e0 che ph\u1ee7 ph\u1ec5u.<\/li>\n<li><span style=\"color: #ff0000;\">Duy tr\u00ec t\u1ef7 l\u1ec7 t\u00e1i ch\u1ebf kh\u00f4ng \u0111\u1ed5i:<\/span> \u0110\u1ec3 t\u00e1i s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u00e1i ch\u1ebf, t\u1ef7 l\u1ec7 ph\u1ea3i \u1ed5n \u0111\u1ecbnh, v\u00ed d\u1ee5 lu\u00f4n gi\u1eef trong kho\u1ea3ng 20 \u0111\u1ebfn 30% \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00f9ng t\u1ed1c \u0111\u1ed9 ch\u1ea3y n\u00f3ng ch\u1ea3y.<\/li>\n<li><span style=\"color: #ff0000;\">Ch\u1ec9 thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn s\u1ed1:<\/span> Khi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, bi\u1ebfn s\u1ed1 n\u00ean \u0111\u01b0\u1ee3c thay \u0111\u1ed5i t\u1eebng c\u00e1i m\u1ed9t v\u00e0 \u00edt nh\u1ea5t 10 \u0111\u1ebfn 15 chu k\u1ef3 n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3.<\/li>\n<li><span style=\"color: #ff0000;\">Gi\u00e1m s\u00e1t th\u1eddi gian l\u01b0u gi\u1eef:<\/span> C\u00e1c chi ti\u1ebft nh\u1ecf tr\u00ean m\u00e1y l\u1edbn d\u1eabn \u0111\u1ebfn th\u1eddi gian l\u01b0u gi\u1eef n\u00f3ng ch\u1ea3y d\u00e0i g\u00e2y ph\u00e2n h\u1ee7y HDPE. Do \u0111\u00f3, tr\u1ecdng l\u01b0\u1ee3ng phun n\u00ean \u1edf m\u1ee9c 35% \u0111\u1ebfn 65% dung t\u00edch th\u00f9ng phun.<\/li>\n<li><span style=\"color: #ff0000;\">Kh\u00f4ng c\u1ea7n x\u1ea3 khi t\u1eaft m\u00e1y:<\/span> HDPE h\u1ea7u nh\u01b0 kh\u00f4ng t\u0103ng nhi\u1ec7t \u0111\u1ed9 n\u00ean kh\u00f4ng c\u1ea7n x\u1ea3. Tuy nhi\u00ean, c\u00f3 th\u1ec3 x\u1ea3 khi kh\u1edfi \u0111\u1ed9ng, b\u1eb1ng c\u00f9ng v\u1eadt li\u1ec7u ho\u1eb7c polyolefin t\u01b0\u01a1ng t\u1ef1.<\/li>\n<li><span style=\"color: #ff0000;\">S\u1eed d\u1ee5ng ki\u1ec3m so\u00e1t quy tr\u00ecnh:<\/span> \u00c1p l\u1ef1c phun, nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y, v.v. n\u00ean \u0111\u01b0\u1ee3c gi\u00e1m s\u00e1t k\u1ef9 thu\u1eadt s\u1ed1, v\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ea3m b\u1ea3o s\u1ea3n xu\u1ea5t c\u00e1c chi ti\u1ebft \u0111\u1ed3ng nh\u1ea5t.<\/li>\n<li><span style=\"color: #ff0000;\">Ghi l\u1ea1i qu\u00e1 tr\u00ecnh:<\/span> C\u1ea7n l\u01b0u l\u1ea1i c\u1eeda s\u1ed5 quy tr\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn.<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ea7n m\u1edf r\u1ed9ng v\u01b0\u1ee3t ra ngo\u00e0i m\u1ed9t m\u00e1y \u00e9p \u0111\u01a1n l\u1ebb, t\u1ef1 \u0111\u1ed9ng h\u00f3a l\u00e0 b\u01b0\u1edbc ti\u1ebfp theo t\u1ef1 nhi\u00ean \u2014 t\u1ed5ng quan c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/benlongkj.com\/vi\/blog\/manufacturing-automation-solutions\/\">gi\u1ea3i ph\u00e1p t\u1ef1 \u0111\u1ed9ng h\u00f3a s\u1ea3n xu\u1ea5t<\/a> bao g\u1ed3m vi\u1ec7c lo\u1ea1i b\u1ecf chi ti\u1ebft b\u1eb1ng robot, ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng v\u00e0 t\u00edch h\u1ee3p d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u00fac.<\/p>\n<hr \/>\n<h2>C\u00e1c s\u1ea3n ph\u1ea9m \u0111\u00fac HDPE \u0111i\u1ec3n h\u00ecnh<\/h2>\n<table>\n<thead>\n<tr>\n<th>Ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/th>\n<th>C\u00e1c b\u1ed9 ph\u1eadn \u0111\u00fac HDPE \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Bao b\u00ec<\/td>\n<td>N\u1eafp chai v\u00e0 n\u1eafp \u0111\u00f3ng, th\u00f9ng, pallet, h\u1ed9p ch\u1ee9a, x\u00f4<\/td>\n<\/tr>\n<tr>\n<td>Gia d\u1ee5ng<\/td>\n<td>D\u1ee5ng c\u1ee5 nh\u00e0 b\u1ebfp, h\u1ed9p l\u01b0u tr\u1eef, th\u1edbt, \u0111\u1ed3 ch\u01a1i, gh\u1ebf<\/td>\n<\/tr>\n<tr>\n<td>\u00d4 t\u00f4<\/td>\n<td>B\u00ecnh nhi\u00ean li\u1ec7u, \u1ed1ng th\u00f4ng gi\u00f3, h\u1ed9p pin, trang tr\u00ed n\u1ed9i th\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td>X\u00e2y d\u1ef1ng<\/td>\n<td>Ph\u1ee5 ki\u1ec7n \u1ed1ng, v\u1ecf \u0111i\u1ec7n, \u0111\u1ed3 n\u1ed9i th\u1ea5t ngo\u00e0i tr\u1eddi, n\u1eafp h\u1ed1 ga<\/td>\n<\/tr>\n<tr>\n<td>Th\u1ef1c ph\u1ea9m &amp; \u0111\u1ed3 u\u1ed1ng<\/td>\n<td>H\u1ed9p \u0111\u1ef1ng th\u1ef1c ph\u1ea9m, th\u00f9ng, khay (c\u00e1c lo\u1ea1i \u0111\u1ea1t ti\u00eau chu\u1ea9n th\u1ef1c ph\u1ea9m FDA)<\/td>\n<\/tr>\n<tr>\n<td>N\u00f4ng nghi\u1ec7p<\/td>\n<td>B\u00ecnh phun, m\u00e1ng \u0103n, b\u1ed9 ph\u1eadn nh\u00e0 k\u00ednh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2 id=\"cost\">Chi ph\u00ed &amp; Th\u1eddi gian chu k\u1ef3 d\u1ef1 ki\u1ebfn<\/h2>\n<table>\n<thead>\n<tr>\n<th>M\u1ee5c<\/th>\n<th>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Gi\u00e1 nh\u1ef1a HDPE<\/td>\n<td>$0.65\u2013$1.10 m\u1ed7i kg (gi\u00e1 h\u00e0ng h\u00f3a, thay \u0111\u1ed5i theo th\u1ecb tr\u01b0\u1eddng)<\/td>\n<\/tr>\n<tr>\n<td>Chi ph\u00ed khu\u00f4n (b\u1ed9 ph\u1eadn \u0111\u01a1n gi\u1ea3n)<\/td>\n<td>$3,000\u2013$15,000 (khu\u00f4n \u0111\u01a1n, th\u00e9p ho\u1eb7c nh\u00f4m)<\/td>\n<\/tr>\n<tr>\n<td>Chi ph\u00ed khu\u00f4n (khu\u00f4n ph\u1ee9c t\u1ea1p nhi\u1ec1u khoang)<\/td>\n<td>$20.000\u2013$80.000+<\/td>\n<\/tr>\n<tr>\n<td>Th\u1eddi gian chu k\u1ef3 (n\u1eafp nh\u1ecf, th\u00e0nh m\u1ecfng)<\/td>\n<td>15\u201330 gi\u00e2y<\/td>\n<\/tr>\n<tr>\n<td>Th\u1eddi gian chu k\u1ef3 (th\u00f9ng l\u1edbn, th\u00e0nh d\u00e0y)<\/td>\n<td>60\u2013120 gi\u00e2y<\/td>\n<\/tr>\n<tr>\n<td>Gi\u00e1 m\u00e1y theo gi\u1edd<\/td>\n<td>$30\u2013$80\/gi\u1edd (thay \u0111\u1ed5i theo tr\u1ecdng l\u01b0\u1ee3ng t\u1ea5n)<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 dung sai \u0111i\u1ec3n h\u00ecnh<\/td>\n<td>\u00b10,05\u20130,2 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Vi\u1ec7c HDPE t\u01b0\u01a1ng \u0111\u1ed1i r\u1ebb v\u00e0 khu\u00f4n nhanh c\u00f3 ngh\u0129a l\u00e0 \u0111\u00e2y l\u00e0 lo\u1ea1i nh\u1ef1a r\u1ea5t ph\u1ea3i ch\u0103ng v\u1edbi chi ph\u00ed khu\u00f4n dao \u0111\u1ed9ng kho\u1ea3ng t\u1eeb $.01 \u0111\u1ebfn $.05 m\u1ed7i b\u1ed9 ph\u1eadn trong c\u00e1c s\u1ea3n xu\u1ea5t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c b\u1ed9 ph\u1eadn \u0111\u00f3ng g\u00f3i. HDPE th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn r\u1ebb nh\u1ea5t trong b\u1ea5t k\u1ef3 so s\u00e1nh v\u1eadt li\u1ec7u n\u00e0o \u0111\u1ec3 s\u1eed d\u1ee5ng cho s\u1ea3n ph\u1ea9m m\u1edbi.<\/p>\n<hr \/>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>HDPE c\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c s\u1ea5y kh\u00f4 tr\u01b0\u1edbc khi \u00e9p phun kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, polyethylene m\u1eadt \u0111\u1ed9 cao (HDPE) h\u1ea5p th\u1ee5 \u00edt h\u01a1n 0.01% \u0111\u1ed9 \u1ea9m, c\u00f3 ngh\u0129a l\u00e0 n\u00f3 g\u1ea7n nh\u01b0 lu\u00f4n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd ngay khi l\u1ea5y ra kh\u1ecfi bao m\u00e0 kh\u00f4ng c\u1ea7n s\u1ea5y kh\u00f4 \u2013 do \u0111\u00f3 gi\u1ea3m th\u1eddi gian thi\u1ebft l\u1eadp t\u1eeb 2-4 gi\u1edd cho m\u1ed7i l\u1ea7n s\u1ea3n xu\u1ea5t. Th\u1eddi \u0111i\u1ec3m duy nh\u1ea5t HDPE c\u1ea7n s\u1ea5y \u1edf 80 \u0111\u1ed9 C trong kho\u1ea3ng 60 ph\u00fat l\u00e0 khi v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n k\u00e9m ho\u1eb7c b\u1ecb ng\u01b0ng t\u1ee5. N\u00ean gi\u1eef ph\u1ec5u \u0111\u1ef1ng ph\u1ee7 k\u00edn v\u00e0 gi\u1eef HDPE s\u1ea1ch \u0111\u1ec3 tr\u00e1nh nhi\u1ec5m b\u1ea9n, \u0111i\u1ec1u n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng x\u1ea3y ra h\u01a1n l\u00e0 nhi\u1ec5m \u1ea9m trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y.<\/p>\n<h3>Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y t\u1ed1t nh\u1ea5t cho \u00e9p phun HDPE l\u00e0 bao nhi\u00eau?<\/h3>\n<p>HDPE \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb nung ch\u1ea3y \u1edf nhi\u1ec7t \u0111\u1ed9 180-280\u00b0C, th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u \u1edf 220\u00b0C. C\u00e1c lo\u1ea1i ph\u00e2n t\u1eed cao (MFI th\u1ea5p) ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t \u1edf 200-250\u00b0C. N\u1ebfu c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng b\u1eafn ng\u1eafn ho\u1eb7c b\u1ec1 m\u1eb7t s\u1ea3n ph\u1ea9m k\u00e9m, n\u00ean t\u0103ng nhi\u1ec7t \u0111\u1ed9. Tuy nhi\u00ean, n\u1ebfu c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng v\u00e0ng, m\u00f9i ho\u1eb7c ph\u00e2n h\u1ee7y s\u1ea3n ph\u1ea9m, nhi\u1ec7t \u0111\u1ed9 ph\u1ea3i \u0111\u01b0\u1ee3c h\u1ea1 xu\u1ed1ng. Nhi\u1ec7t \u0111\u1ed9 trong c\u00e1c v\u00f9ng th\u00f9ng th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb 200-240\u00b0C t\u1eeb v\u00f9ng 1 \u0111\u1ebfn v\u00f2i phun.<\/p>\n<h3>T\u1ea1i sao HDPE co r\u00fat nhi\u1ec1u nh\u01b0 v\u1eady, v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m so\u00e1t n\u00f3?<\/h3>\n<p>B\u1ea3n ch\u1ea5t b\u00e1n tinh th\u1ec3 c\u1ee7a HDPE d\u1eabn \u0111\u1ebfn s\u1ef1 co r\u00fat l\u1edbn h\u01a1n so v\u1edbi c\u00e1c v\u1eadt li\u1ec7u v\u00f4 \u0111\u1ecbnh h\u00ecnh do c\u1ea5u tr\u00fac c\u00f3 tr\u1eadt t\u1ef1 c\u1ee7a c\u00e1c chu\u1ed7i polymer \u0111\u01b0\u1ee3c t\u1ea1o ra qua qu\u00e1 tr\u00ecnh l\u00e0m ngu\u1ed9i. \u0110\u1ed9 co r\u00fat khi \u0111\u00fac kho\u1ea3ng 1,5 \u2013 3,5%. \u0110\u1ec3 ki\u1ec3m so\u00e1t s\u1ef1 co r\u00fat, khu\u00f4n n\u00ean \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi h\u1ec7 s\u1ed1 co r\u00fat \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn, \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a \u0111\u1ed9 d\u00e0y th\u00e0nh khu\u00f4n \u0111\u01b0\u1ee3c duy tr\u00ec \u1edf t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m, v\u00e0 \u00e1p su\u1ea5t t\u1eeb 40% \u0111\u1ebfn 60% c\u00f9ng v\u1edbi th\u1eddi gian l\u00e0m ngu\u1ed9i t\u1eeb 50% \u0111\u1ebfn 80% \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi l\u00e0m ngu\u1ed9i \u0111\u1ed3ng \u0111\u1ec1u. Gia nhi\u1ec7t sau khi \u0111\u00fac \u1edf nhi\u1ec7t \u0111\u1ed9 80 \u0111\u1ebfn 100 \u00b0C gi\u00fap \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u00e1c chi ti\u1ebft c\u00f3 dung sai ch\u1eb7t ch\u1ebd v\u00e0 c\u1ea7n th\u1eddi gian x\u1eed l\u00fd t\u1eeb n\u1eeda gi\u1edd \u0111\u1ebfn m\u1ed9t gi\u1edd.<\/p>\n<h3>T\u00f4i c\u1ea7n m\u00e1y \u00e9p phun n\u00e0o cho HDPE?<\/h3>\n<p>M\u1ed9t m\u00e1y \u00e9p phun ti\u00eau chu\u1ea9n v\u1edbi tr\u1ee5c v\u00edt 3 \u0111o\u1ea1n (L\/D 25:1), v\u00f2i phun \u0111\u00f3ng v\u00e0 van m\u1ed9t chi\u1ec1u c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng x\u1eed l\u00fd HDPE. HDPE c\u00f3 \u0111\u1ed9 nh\u1edbt n\u00f3ng ch\u1ea3y th\u1ea5p, do \u0111\u00f3 \u00e1p su\u1ea5t \u00e9p phun th\u1ea5p h\u01a1n (70\u2013120 MPa) so v\u1edbi nh\u1ef1a k\u1ef9 thu\u1eadt. V\u00ec t\u1ed1c \u0111\u1ed9 tr\u1ee5c v\u00edt cao \u0111\u01b0\u1ee3c ph\u00e9p (v\u1eadn t\u1ed1c tuy\u1ebfn t\u00ednh c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn 1,3 m\/s), trong tr\u01b0\u1eddng h\u1ee3p ch\u1ea5t l\u01b0\u1ee3ng n\u00f3ng ch\u1ea3y \u0111\u1ed3ng nh\u1ea5t, n\u00ean \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc l\u01b0\u1ee3ng phun \u1edf m\u1ee9c 35\u201365% dung t\u00edch th\u00f9ng ch\u1ee9a v\u00e0 \u0111\u1eb7t h\u00e0nh tr\u00ecnh \u0111o kho\u1ea3ng 4 \u0111\u01b0\u1eddng k\u00ednh tr\u1ee5c v\u00edt.<\/p>\n<h3>C\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng HDPE nghi\u1ec1n l\u1ea1i trong \u00e9p phun kh\u00f4ng?<\/h3>\n<p>\u0110\u00fang v\u1eady \u2014 HDPE l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i nh\u1ef1a nhi\u1ec7t d\u1ebbo c\u00f3 th\u1ec3 t\u00e1i ch\u1ebf nhi\u1ec1u nh\u1ea5t, v\u1edbi kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i l\u00ean \u0111\u1ebfn 100% trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau. \u0110\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1t nh\u1ea5t, b\u1ea1n ph\u1ea3i \u0111\u1ea3m b\u1ea3o t\u1ef7 l\u1ec7 pha tr\u1ed9n HDPE nghi\u1ec1n l\u1ea1i \u0111\u01b0\u1ee3c gi\u1eef \u1ed5n \u0111\u1ecbnh (h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 \u0111\u00fac th\u01b0\u1eddng s\u1eed d\u1ee5ng kho\u1ea3ng 20-30% HDPE nghi\u1ec1n l\u1ea1i pha tr\u1ed9n v\u1edbi nh\u1ef1a nguy\u00ean sinh) v\u00e0 HDPE nghi\u1ec1n l\u1ea1i kh\u00f4ng b\u1ecb nhi\u1ec5m b\u1ea9n. Kh\u00e1c v\u1edbi c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u t\u00e1i ch\u1ebf th\u00f4ng th\u01b0\u1eddng, HDPE nghi\u1ec1n l\u1ea1i kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c ch\u1ea5p thu\u1eadn cho c\u00e1c \u1ee9ng d\u1ee5ng ti\u1ebfp x\u00fac th\u1ef1c ph\u1ea9m.<\/p>\n<hr \/>\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.astm.org\/\" target=\"_blank\" rel=\"noopener\">ASTM International<\/a> \u2014 Xu\u1ea5t b\u1ea3n ti\u00eau chu\u1ea9n ASTM D4976 (v\u1eadt li\u1ec7u \u0111\u00fac v\u00e0 \u00e9p \u0111\u00f9n polyethylene) v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed li\u00ean quan cho c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a HDPE nh\u01b0 m\u1eadt \u0111\u1ed9, MFI v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o.<\/li>\n<li><a href=\"https:\/\/www.iso.org\/\" target=\"_blank\" rel=\"noopener\">ISO (T\u1ed5 ch\u1ee9c Ti\u00eau chu\u1ea9n h\u00f3a Qu\u1ed1c t\u1ebf)<\/a> \u2014 Xu\u1ea5t b\u1ea3n ISO 17855-1\/-2 cho v\u1eadt li\u1ec7u \u0111\u00fac polyethylene, \u0111\u1ecbnh ngh\u0129a c\u00e1c l\u1edbp \u0111\u1eb7c t\u00ednh v\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed.<\/li>\n<li><a href=\"https:\/\/www.ptonline.com\/\" target=\"_blank\" rel=\"noopener\">T\u1ea1p ch\u00ed C\u00f4ng ngh\u1ec7 Nh\u1ef1a<\/a> \u2014 \u1ea4n ph\u1ea9m ng\u00e0nh c\u00f4ng nghi\u1ec7p bao g\u1ed3m d\u1eef li\u1ec7u x\u1eed l\u00fd HDPE th\u1ef1c t\u1ebf, bi\u1ec3u \u0111\u1ed3 tham s\u1ed1 v\u00e0 l\u1eddi khuy\u00ean kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 cho c\u00e1c nh\u00e0 \u0111\u00fac \u00e9p.<\/li>\n<li><a href=\"https:\/\/www.engelglobal.com\/\" target=\"_blank\" rel=\"noopener\">ENGEL<\/a> \u2014 Nh\u00e0 s\u1ea3n xu\u1ea5t m\u00e1y \u00e9p phun l\u1edbn; h\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd c\u1ee7a h\u1ecd ghi l\u1ea1i thi\u1ebft l\u1eadp m\u00e1y v\u00e0 khuy\u1ebfn ngh\u1ecb tham s\u1ed1 cho polyolefin nh\u01b0 HDPE.<\/li>\n<li><a href=\"https:\/\/www.kraussmaffei.com\/\" target=\"_blank\" rel=\"noopener\">KraussMaffei<\/a> \u2014 Nh\u00e0 s\u1ea3n xu\u1ea5t m\u00e1y \u00e9p phun v\u1edbi h\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd v\u00e0 khuy\u1ebfn ngh\u1ecb tr\u1ee5c v\u00edt\/th\u00f9ng ch\u1ee9a cho c\u00e1c lo\u1ea1i polyethylene.<\/li>\n<li><a href=\"https:\/\/www.fda.gov\/food\/food-ingredients-packaging\/food-contact-substances-fcs\" target=\"_blank\" rel=\"noopener\">FDA Th\u1ef1c ph\u1ea9m Ti\u1ebfp x\u00fac Ch\u1ea5t li\u1ec7u<\/a> \u2014 Tham chi\u1ebfu quy \u0111\u1ecbnh x\u00e1c nh\u1eadn c\u00e1c lo\u1ea1i HDPE \u0111\u1ea1t chu\u1ea9n th\u1ef1c ph\u1ea9m \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a FDA cho c\u00e1c \u1ee9ng d\u1ee5ng ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi th\u1ef1c ph\u1ea9m.<\/li>\n<\/ul>\n<hr \/>\n<p>\u00c9p phun HDPE l\u00e0 m\u1ed9t quy tr\u00ecnh \u0111\u01a1n gi\u1ea3n v\u00e0 chi ph\u00ed th\u1ea5p, n\u1ebfu b\u1ea1n tu\u00e2n theo m\u1ed9t s\u1ed1 m\u1eb9o quan tr\u1ecdng. M\u1ed9t v\u00e0i \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd:<\/p>\n<ul>\n<li>Tham s\u1ed1: Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y n\u00ean \u0111\u01b0\u1ee3c gi\u1eef trong kho\u1ea3ng t\u1eeb 200\u00b0C \u0111\u1ebfn 280\u00b0C (b\u1eaft \u0111\u1ea7u v\u1edbi 220\u00b0C), nhi\u1ec7t \u0111\u1ed9 khu\u00f4n n\u00ean \u0111\u01b0\u1ee3c gi\u1eef trong kho\u1ea3ng t\u1eeb 20\u00b0C \u0111\u1ebfn 70\u00b0C (\u0111i\u1ec3m l\u00fd t\u01b0\u1edfng l\u00e0 t\u1eeb 40\u00b0C \u0111\u1ebfn 60\u00b0C), \u00e1p l\u1ef1c ti\u00eam n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong kho\u1ea3ng t\u1eeb 70 MPa \u0111\u1ebfn 140 MPa v\u00e0 \u00e1p l\u1ef1c gi\u1eef n\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t trong kho\u1ea3ng t\u1eeb 40 MPa \u0111\u1ebfn 60 MPa.<\/li>\n<li>Kh\u00f4ng c\u1ea7n s\u1ea5y kh\u00f4 \u2013 B\u1ea1n c\u00f3 th\u1ec3 b\u1ecf qua b\u01b0\u1edbc s\u1ea5y v\u00ec HDPE c\u00f3 \u0111\u1ed9 h\u00fat \u1ea9m d\u01b0\u1edbi 0.01%, gi\u00fap t\u0103ng t\u1ed1c t\u1ea5t c\u1ea3 c\u00e1c thao t\u00e1c. Ch\u1ec9 c\u1ea7n gi\u1eef cho n\u00f3 s\u1ea1ch s\u1ebd.<\/li>\n<li>Co r\u00fat l\u00e0 v\u1ea5n \u0111\u1ec1 kh\u00f3 kh\u0103n nh\u1ea5t \u2013 C\u1ea7n t\u00ednh \u0111\u1ebfn co r\u00fat t\u1eeb 1.5% \u0111\u1ebfn 3.5% trong khu\u00f4n, t\u01b0\u1eddng khu\u00f4n c\u1ea7n \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 \u00e1p d\u1ee5ng \u0111\u1ee7 \u00e1p l\u1ef1c.<\/li>\n<li>Thi\u1ebft b\u1ecb th\u00f4ng th\u01b0\u1eddng l\u00e0 \u0111\u1ee7 \u2013 V\u00ec c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c m\u00e1y m\u00f3c chung, kh\u00f4ng c\u1ea7n d\u00f9ng thi\u1ebft b\u1ecb \u0111\u1eaft ti\u1ec1n v\u00ec HDPE y\u00eau c\u1ea7u \u00e1p l\u1ef1c th\u1ea5p h\u01a1n nhi\u1ec1u.<\/li>\n<li>B\u1ea1n c\u00f3 th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c khuy\u1ebft t\u1eadt \u2013 v\u1ebft l\u00f5m, cong v\u00eanh v\u00e0 ti\u00eam kh\u00f4ng \u0111\u1ea7y \u0111\u1ec1u c\u00f3 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p r\u1ea5t r\u00f5 r\u00e0ng.<\/li>\n<li>Chi ph\u00ed th\u1ea5p \u2013 nh\u1ef1a kh\u00f4ng qu\u00e1 \u0111\u1eaft, chu k\u1ef3 nhanh (20-60 gi\u00e2y), v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ea1i \u0111\u1ebfn 100% nguy\u00ean li\u1ec7u t\u00e1i ch\u1ebf.<\/li>\n<\/ul>\n<p>S\u1eed d\u1ee5ng h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c m\u1ebb s\u1ea3n xu\u1ea5t ch\u1ea5t l\u01b0\u1ee3ng v\u1edbi HDPE.<\/p>","protected":false},"excerpt":{"rendered":"<p>When creating a new high-density polyethylene (HDPE) piece \u2014 whether it\u2019s bottle caps, crates, pipe fittings, tank components, or household items \u2014 it is crucial to get everything right. Due to the forgiving nature of HDPE, it has become one of the most commonly used material where molding is concerned (which explains why it is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1440,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/1436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/comments?post=1436"}],"version-history":[{"count":3,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/1436\/revisions"}],"predecessor-version":[{"id":1443,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/1436\/revisions\/1443"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media\/1440"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media?parent=1436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/categories?post=1436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/tags?post=1436"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}