{"id":4346,"date":"2026-05-20T08:11:15","date_gmt":"2026-05-20T08:11:15","guid":{"rendered":"https:\/\/productionscrews.com\/plastic-spacers\/"},"modified":"2026-05-20T08:24:38","modified_gmt":"2026-05-20T08:24:38","slug":"plastic-spacers","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/plastic-spacers\/","title":{"rendered":"V\u1eadt t\u01b0 c\u00e1ch nhi\u1ec7t nh\u1ef1a: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c lo\u1ea1i, v\u1eadt li\u1ec7u &amp; l\u1ef1a ch\u1ecdn"},"content":{"rendered":"<pre>\u1ed0ng nh\u1ef1a c\u00e1ch nhi\u1ec7t: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c lo\u1ea1i, v\u1eadt li\u1ec7u v\u00e0 l\u1ef1a ch\u1ecdn<\/pre>\n<p class=\"direct-answer\"><strong>\u1ed0ng nh\u1ef1a c\u00e1ch nhi\u1ec7t l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n c\u1ed1 \u0111\u1ecbnh h\u00ecnh tr\u1ee5 ho\u1eb7c \u1ed1ng d\u00f9ng \u0111\u1ec3 t\u1ea1o ra c\u00e1c khe h\u1edf ch\u00ednh x\u00e1c, c\u00e1ch ly \u0111i\u1ec7n gi\u1eefa c\u00e1c v\u1eadt li\u1ec7u, v\u00e0 h\u1ea5p th\u1ee5 rung \u0111\u1ed9ng trong c\u00e1c b\u1ed9 l\u1eafp r\u00e1p c\u01a1 kh\u00ed v\u00e0 \u0111i\u1ec7n t\u1eed.<\/strong><\/p>\n<p>M\u1ed7i s\u1ea3n ph\u1ea9m k\u1ef9 thu\u1eadt \u0111\u1ec1u ch\u1ee9a nh\u1eefng anh h\u00f9ng \u1ea9n \u2014 c\u00e1c th\u00e0nh ph\u1ea7n kh\u00f4ng di chuy\u1ec3n, kh\u00f4ng mang t\u1ea3i tr\u1ecdng m\u1ed9t m\u00ecnh, v\u00e0 hi\u1ebfm khi \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. \u1ed0ng nh\u1ef1a c\u00e1ch nhi\u1ec7t ch\u00ednh x\u00e1c nh\u01b0 v\u1eady. D\u00f9 b\u1ea1n \u0111ang l\u1eafp r\u00e1p gi\u00e1 \u0111\u1ee1 PCB, l\u1eafp \u0111\u1eb7t t\u1ea5m pin m\u1eb7t tr\u1eddi, x\u00e2y d\u1ef1ng c\u00e1c b\u1ed9 ph\u1ee5 ki\u1ec7n \u00f4 t\u00f4, hay ch\u1ebf t\u1ea1o thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p, \u1ed1ng nh\u1ef1a c\u00e1ch nhi\u1ec7t ph\u00f9 h\u1ee3p ch\u00ednh l\u00e0 th\u1ee9 gi\u1eef kho\u1ea3ng c\u00e1ch ch\u00ednh x\u00e1c, ng\u0103n ch\u1eb7n ti\u1ebfp x\u00fac kim lo\u1ea1i v\u1edbi kim lo\u1ea1i, v\u00e0 gi\u1eef \u0111\u1ed9 dung sai \u1ed5n \u0111\u1ecbnh qua h\u00e0ng ngh\u00ecn gi\u1edd s\u1eed d\u1ee5ng. Sai l\u1ea7m trong ch\u1ecdn l\u1ef1a s\u1ebd d\u1eabn \u0111\u1ebfn bo m\u1ea1ch n\u1ee9t, \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a, ph\u1ea7n c\u1ee9ng rung l\u1eafc, v\u00e0 c\u00e1c b\u1ed9 l\u1eafp r\u00e1p th\u1ea5t b\u1ea1i. Ch\u1ecdn \u0111\u00fang s\u1ebd gi\u00fap s\u1ea3n ph\u1ea9m ho\u1ea1t \u0111\u1ed9ng \u2014 y\u00ean t\u0129nh, \u0111\u00e1ng tin c\u1eady, v\u00f4 h\u1ea1n \u0111\u1ecbnh.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m t\u1ea5t c\u1ea3 nh\u1eefng g\u00ec k\u1ef9 s\u01b0, ng\u01b0\u1eddi mua v\u00e0 ng\u01b0\u1eddi l\u1eafp r\u00e1p c\u1ea7n bi\u1ebft: \u1ed1ng nh\u1ef1a c\u00e1ch nhi\u1ec7t l\u00e0 g\u00ec, c\u00e1c lo\u1ea1i ch\u00ednh v\u00e0 v\u1eadt li\u1ec7u, c\u00e1ch ch\u1ecdn ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n, v\u00e0 ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111ang h\u01b0\u1edbng t\u1edbi \u0111\u00e2u trong hai n\u0103m t\u1edbi.<\/p>\n<hr \/>\n<h2>\u1ed0ng nh\u1ef1a c\u00e1ch nhi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n<p><strong>\u1ed0ng nh\u1ef1a c\u00e1ch nhi\u1ec7t l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u1ed1ng kh\u00f4ng ren ho\u1eb7c c\u00f3 ren \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t gi\u1eefa hai b\u1ec1 m\u1eb7t \u0111\u1ec3 duy tr\u00ec kho\u1ea3ng c\u00e1ch x\u00e1c \u0111\u1ecbnh, ph\u00e2n ph\u1ed1i t\u1ea3i tr\u1ecdng, ng\u0103n ch\u1eb7n ti\u1ebfp x\u00fac, ho\u1eb7c cung c\u1ea5p c\u00e1ch \u0111i\u1ec7n \u0111i\u1ec7n.<\/strong> Ch\u00fang n\u1eb1m tr\u00ean m\u1ed9t ph\u1ea7n c\u1ed1 \u0111\u1ecbnh (\u1ed1c v\u00edt, v\u00edt, ho\u1eb7c thanh) v\u00e0 gi\u1eef c\u00e1c b\u1ed9 ph\u1eadn l\u1eafp r\u00e1p \u1edf m\u1ed9t kho\u1ea3ng c\u00e1ch ch\u00ednh x\u00e1c v\u1edbi nhau.<\/p>\n<p>Thu\u1eadt ng\u1eef \u201c\u1ed1ng nh\u1ef1a c\u00e1ch nhi\u1ec7t\u201d bao g\u1ed3m m\u1ed9t ph\u1ea1m vi r\u1ed9ng. Trong ph\u1ea1m vi h\u1eb9p nh\u1ea5t, n\u00f3 ngh\u0129a l\u00e0 m\u1ed9t \u1ed1ng tr\u01a1n tr\u1ee5c \u0111\u01a1n gi\u1ea3n \u0111\u01b0\u1ee3c gia c\u00f4ng ho\u1eb7c \u0111\u00fac trong khu\u00f4n t\u1eeb polymer k\u1ef9 thu\u1eadt. Trong ph\u1ea1m vi r\u1ed9ng nh\u1ea5t, n\u00f3 bao g\u1ed3m c\u00e1c ch\u00e2n \u0111\u1ee1 c\u00f3 ren, \u1ed1ng c\u00e1ch nhi\u1ec7t vai, \u1ed1ng c\u00e1ch nhi\u1ec7t b\u01b0\u1edbc, v\u00e0 \u0111\u0129a \u0111\u1ec7m ph\u1eb3ng d\u1ea1ng \u0111\u0129a ho\u1ea1t \u0111\u1ed9ng nh\u01b0 c\u00e1c \u1ed1ng c\u00e1ch nhi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng khe h\u1eb9p.<\/p>\n<h3>Ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i trong c\u00e1c b\u1ed9 l\u1eafp r\u00e1p c\u01a1 kh\u00ed<\/h3>\n<p>Trong th\u1ef1c t\u1ebf, \u1ed1ng nh\u1ef1a c\u00e1ch nhi\u1ec7t th\u1ef1c hi\u1ec7n b\u1ed1n nhi\u1ec7m v\u1ee5 ri\u00eang bi\u1ec7t \u2014 th\u01b0\u1eddng c\u00f9ng l\u00fac trong c\u00f9ng m\u1ed9t b\u1ed9 l\u1eafp r\u00e1p:<\/p>\n<ol>\n<li><strong>Ki\u1ec3m so\u00e1t khe h\u1edf<\/strong> \u2014 Gi\u1eef hai b\u1ed9 ph\u1eadn \u1edf kho\u1ea3ng c\u00e1ch tr\u1ee5c x\u00e1c \u0111\u1ecbnh \u0111\u1ec3 c\u00e1c m\u1ed1i n\u1ed1i b\u1eaft v\u00edt kh\u00f4ng b\u1ecb n\u00e9n qu\u00e1 m\u1ee9c c\u00e1c gio\u0103ng, PCB ho\u1eb7c v\u1eadt li\u1ec7u laminate.<\/li>\n<li><strong>Ph\u00e2n ph\u1ed1i t\u1ea3i tr\u1ecdng<\/strong> Ph\u1ed5 bi\u1ebfn <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-clamping-force-test-methods-for-engineering-success\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"1151\">l\u1ef1c k\u1eb9p<\/a> ph\u1ee7 r\u1ed9ng h\u01a1n \u0111\u1ec3 ng\u0103n ch\u1eb7n nghi\u1ec1n n\u00e1t c\u00e1c n\u1ec1n m\u1ec1m nh\u01b0 nh\u1ef1a, h\u1ee3p kim g\u1ed7 ho\u1eb7c kim lo\u1ea1i m\u1ecfng.<\/li>\n<li><strong>C\u00e1ch ly \u0111i\u1ec7n<\/strong> \u2014 Ch\u1eb7n c\u00e1c \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n d\u1eabn \u0111i\u1ec7n. \u1ed0ng nylon v\u00e0 acetal \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong \u0111i\u1ec7n t\u1eed v\u00e0 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n \u00f4 t\u00f4 \u0111\u1ec3 m\u1ee5c \u0111\u00edch n\u00e0y. Theo <a href=\"https:\/\/en.wikipedia.org\/wiki\/Nylon\" target=\"_blank\" rel=\"noopener\">b\u00e0i vi\u1ebft c\u1ee7a Wikipedia v\u1ec1 \u0111\u1eb7c t\u00ednh c\u00e1ch \u0111i\u1ec7n c\u1ee7a polyamide<\/a>, nylon th\u1ec3 hi\u1ec7n \u0111i\u1ec7n tr\u1edf th\u1ec3 t\u00edch t\u1eeb 10\u00b9\u00b2\u201310\u00b9\u2074 \u03a9\u00b7cm \u2014 \u0111\u1ee7 \u0111\u1ec3 c\u00e1ch ly \u0111i\u1ec7n \u00e1p th\u1ea5p.<\/li>\n<li><strong>Gi\u1ea3m rung \u0111\u1ed9ng<\/strong> \u2014 H\u1ea5p th\u1ee5 c\u00e1c chuy\u1ec3n \u0111\u1ed9ng vi m\u00f4 v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u00e2m thanh gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t c\u1ee9ng. C\u00e1c \u1ed1ng polymer c\u00f3 t\u00ednh linh ho\u1ea1t t\u1ef1 nhi\u00ean m\u00e0 c\u00e1c ch\u00e2n \u0111\u1ee1 kim lo\u1ea1i kh\u00f4ng th\u1ec3 sao ch\u00e9p.<img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-4349 size-large\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-800x533.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-800x533.png 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-360x240.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-150x100.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-768x512.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-18x12.png 18w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image.png 1536w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/li>\n<\/ol>\n<h3>\u1ed0ng nh\u1ef1a c\u00e1ch nhi\u1ec7t so v\u1edbi \u1ed1ng kim lo\u1ea1i<\/h3>\n<p>C\u00e1c mi\u1ebfng \u0111\u1ec7m nh\u1ef1a kh\u00f4ng thay th\u1ebf ho\u00e0n to\u00e0n c\u00e1c mi\u1ebfng \u0111\u1ec7m kim lo\u1ea1i trong m\u1ecdi \u1ee9ng d\u1ee5ng \u2014 ch\u00fang b\u1ed5 sung cho ch\u00fang. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh tr\u1ef1c ti\u1ebfp:<\/p>\n<table>\n<thead>\n<tr>\n<th>Thu\u1ed9c t\u00ednh<\/th>\n<th>Mi\u1ebfng \u0111\u1ec7m nh\u1ef1a<\/th>\n<th>Mi\u1ebfng \u0111\u1ec7m kim lo\u1ea1i (Th\u00e9p \/ \u0110\u1ed3ng \/ Nh\u00f4m)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tr\u1ecdng l\u01b0\u1ee3ng<\/td>\n<td>R\u1ea5t nh\u1eb9 (nylon: kho\u1ea3ng 1.15 g\/cm\u00b3)<\/td>\n<td>N\u1eb7ng (th\u00e9p: kho\u1ea3ng 7.9 g\/cm\u00b3)<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1ch \u0111i\u1ec7n<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>Kh\u00f4ng d\u1eabn \u0111i\u1ec7n (ch\u1ea5t d\u1eabn \u0111i\u1ec7n)<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ed1ng \u0103n m\u00f2n<\/td>\n<td>Xu\u1ea5t s\u1eafc (h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i polyme)<\/td>\n<td>Ph\u1ee5 thu\u1ed9c v\u00e0o h\u1ee3p kim\/l\u1edbp ph\u1ee7<\/td>\n<\/tr>\n<tr>\n<td>Dung l\u01b0\u1ee3ng ch\u1ecbu t\u1ea3i<\/td>\n<td>Trung b\u00ecnh (nylon: 80\u2013110 MPa n\u00e9n)<\/td>\n<td>Cao (th\u00e9p: 400\u2013500 MPa)<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td>\n<td>Th\u1ea5p (t\u1ed1t cho c\u00e1ch nhi\u1ec7t nhi\u1ec7t)<\/td>\n<td>Cao (t\u1ed1t cho \u0111\u01b0\u1eddng d\u1eabn nhi\u1ec7t)<\/td>\n<\/tr>\n<tr>\n<td>Chi ph\u00ed<\/td>\n<td>Th\u1ea5p \u0111\u1ebfn trung b\u00ecnh<\/td>\n<td>Trung b\u00ecnh \u0111\u1ebfn cao<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng gia c\u00f4ng \/ k\u00edch th\u01b0\u1edbc t\u00f9y ch\u1ec9nh<\/td>\n<td>\u0110\u00fac \u00e9p b\u1eb1ng khu\u00f4n, chi ph\u00ed NRE th\u1ea5p<\/td>\n<td>Gia c\u00f4ng CNC, chi ph\u00ed NRE cao h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Kh\u00e1ng h\u00f3a ch\u1ea5t<\/td>\n<td>Ph\u1ee5 thu\u1ed9c v\u00e0o v\u1eadt li\u1ec7u<\/td>\n<td>Ph\u1ee5 thu\u1ed9c v\u00e0o l\u1edbp ph\u1ee7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Quy\u1ebft \u0111\u1ecbnh th\u1ef1c t\u1ebf: s\u1eed d\u1ee5ng mi\u1ebfng \u0111\u1ec7m nh\u1ef1a khi b\u1ea1n c\u1ea7n c\u00e1ch nhi\u1ec7t, ch\u1ed1ng \u0103n m\u00f2n ho\u1eb7c gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng. S\u1eed d\u1ee5ng kim lo\u1ea1i khi b\u1ea1n c\u1ea7n \u0111\u1ed9 ch\u1ecbu n\u00e9n t\u1ed1i \u0111a \u1edf nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c trong m\u00f4i tr\u01b0\u1eddng polymer d\u1ec5 ph\u00e2n h\u1ee7y.<\/p>\n<hr \/>\n<h2>C\u00e1c lo\u1ea1i V\u1eadt li\u1ec7u c\u00e1ch ly nh\u1ef1a<\/h2>\n<p><strong>V\u1eadt li\u1ec7u c\u00e1ch ly nh\u1ef1a c\u00f3 b\u1ed1n d\u1ea1ng ch\u00ednh: h\u00ecnh tr\u00f2n\/h\u00ecnh tr\u1ee5, h\u00ecnh l\u1ee5c gi\u00e1c, \u0111\u0129a ph\u1eb3ng, v\u00e0 ch\u00e2n \u0111\u1ebf c\u00f3 ren \u2014 m\u1ed7i lo\u1ea1i t\u1ed1i \u01b0u cho c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp r\u00e1p v\u00e0 t\u1ea3i tr\u1ecdng kh\u00e1c nhau.<\/strong><\/p>\n<p>L\u1ef1a ch\u1ecdn lo\u1ea1i \u1ea3nh h\u01b0\u1edfng kh\u00f4ng ch\u1ec9 \u0111\u1ebfn c\u00e1ch b\u1ea1n l\u1eafp \u0111\u1eb7t m\u00e0 c\u00f2n \u0111\u1ebfn \u0111\u1ed9 dung sai b\u1ea1n c\u00f3 th\u1ec3 gi\u1eef v\u00e0 c\u00f4ng c\u1ee5 c\u1ea7n truy c\u1eadp \u0111\u1ec3 l\u1eafp r\u00e1p.<\/p>\n<h3>Kho\u1ea3ng c\u00e1ch tr\u00f2n (h\u00ecnh tr\u1ee5)<\/h3>\n<p>V\u1eadt c\u00e1ch ly h\u00ecnh tr\u00f2n l\u00e0 c\u01a1 s\u1edf: m\u1ed9t h\u00ecnh tr\u1ee5 tr\u01a1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD), \u0111\u01b0\u1eddng k\u00ednh trong (ID) v\u00e0 chi\u1ec1u d\u00e0i x\u00e1c \u0111\u1ecbnh. Ch\u00fang tr\u01b0\u1ee3t qua m\u1ed9t bu l\u00f4ng ho\u1eb7c thanh v\u00e0 n\u1eb1m gi\u1eefa hai b\u1ec1 m\u1eb7t k\u1eb9p ch\u1eb7t.<\/p>\n<ul>\n<li><strong>C\u1ea5u h\u00ecnh ph\u1ed5 bi\u1ebfn nh\u1ea5t<\/strong> trong c\u00e1c b\u1ed9 l\u1eafp r\u00e1p \u0111a d\u1ee5ng<\/li>\n<li>Chi\u1ec1u d\u00e0i quy\u1ebft \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch; ID ph\u1ea3i v\u01b0\u1ee3t qua \u0111\u01b0\u1ee3c bu l\u00f4ng v\u1edbi \u0111\u1ed9 dung sai \u0111\u1ee7 \u0111\u1ec3 d\u1ec5 d\u00e0ng l\u1eafp r\u00e1p (th\u01b0\u1eddng +0.1 \u0111\u1ebfn +0.3 mm)<\/li>\n<li>C\u00f3 s\u1eb5n theo c\u00e1c m\u1ee9c ti\u00eau chu\u1ea9n (k\u00edch th\u01b0\u1edbc l\u1ed7 M3, M4, M5, M6, ho\u1eb7c c\u00e1c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng inch ph\u00e2n s\u1ed1)<\/li>\n<li>Theo kinh nghi\u1ec7m c\u1ee7a ch\u00fang t\u00f4i, c\u00e1c v\u1eadt c\u00e1ch ly nylon h\u00ecnh tr\u00f2n k\u00edch th\u01b0\u1edbc M4 \u00d7 5 mm v\u00e0 M4 \u00d7 10 mm chi\u1ebfm kho\u1ea3ng 60% c\u00f4ng vi\u1ec7c l\u1eafp \u0111\u1eb7t h\u1ed9p \u0111i\u1ec7n t\u1eed<\/li>\n<\/ul>\n<p>Ch\u00fang l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u khi m\u1ed1i n\u1ed1i ch\u1ec9 c\u1ea7n b\u1eaft v\u00edt t\u1eeb b\u00ean ngo\u00e0i m\u00e0 kh\u00f4ng g\u1eb7p h\u1ea1n ch\u1ebf truy c\u1eadp c\u00f4ng c\u1ee5.<\/p>\n<h3>V\u1eadt c\u00e1ch ly v\u00e0 ch\u00e2n \u0111\u1ebf h\u00ecnh l\u1ee5c gi\u00e1c<\/h3>\n<p><a href=\"https:\/\/productionscrews.com\/vi\/male-to-female-hex-spacer\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1147\">Kho\u1ea3ng c\u00e1ch Hex<\/a> V\u1eadt c\u00e1ch ly h\u00ecnh l\u1ee5c gi\u00e1c c\u00f3 h\u00ecnh d\u1ea1ng ngo\u00e0i l\u00e0 h\u00ecnh l\u1ee5c gi\u00e1c \u2014 c\u00f9ng h\u00ecnh d\u1ea1ng ph\u1eb3ng \u0111\u1ebfn ph\u1eb3ng nh\u01b0 \u0111ai \u1ed1c. Th\u00e2n h\u00ecnh l\u1ee5c gi\u00e1c cho ph\u00e9p k\u00ecm ho\u1eb7c \u1ed5 c\u1eafm v\u1eb7n tr\u1ef1c ti\u1ebfp v\u00e0o v\u1eadt c\u00e1ch ly, \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng khi c\u1ea7n si\u1ebft ch\u1eb7t ho\u1eb7c khi v\u1eadt c\u00e1ch ly ph\u1ea3i quay trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/p>\n<p>C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn:<br \/>\n\u2013 G\u1eafn b\u1ea3ng m\u1ea1ch in (PCB) gi\u1eefa c\u00e1c b\u1ea3ng ch\u1ed3ng l\u00ean nhau<br \/>\n\u2013 Ch\u00e2n \u0111\u1ebf khung m\u00e1y n\u01a1i v\u1eadt c\u00e1ch ly c\u00f2n \u0111\u00f3ng vai tr\u00f2 nh\u01b0 tr\u1ee5 c\u1ea5u tr\u00fac<br \/>\n\u2013 B\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o c\u1ea7n ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn ch\u00ednh x\u00e1c tr\u00ean th\u00e2n v\u1eadt c\u00e1ch ly, kh\u00f4ng ch\u1ec9 bu l\u00f4ng<\/p>\n<p>C\u00e1c \u0111\u1ebf ch\u1ed1ng Hex th\u01b0\u1eddng \u0111\u01b0\u1ee3c b\u00e1n d\u01b0\u1edbi d\u1ea1ng nam-\u0111\u1ef1c v\u00e0 n\u1eef-c\u00e1i (m\u1ed9t) <a href=\"https:\/\/productionscrews.com\/vi\/the-ultimate-guide-to-double-end-threaded-stud-screw-bolt-applications\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1148\">Vui l\u00f2ng cung c\u1ea5p v\u0103n b\u1ea3n c\u1ea7n d\u1ecbch \u0111\u1ec3 t\u00f4i c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n.<\/a> b\u00ean ngo\u00e0i, ph\u1ea7n c\u00f2n l\u1ea1i c\u00f3 ren b\u00ean trong) ho\u1eb7c n\u1eef-n\u1eef (c\u1ea3 hai \u0111\u1ea7u c\u00f3 ren b\u00ean trong). Ch\u00fang l\u00e0 ti\u00eau chu\u1ea9n \u0111\u1ec3 x\u1ebfp ch\u1ed3ng PCB trong \u0111i\u1ec7n t\u1eed v\u00ec ch\u00fang cho ph\u00e9p b\u1eaft v\u00edt m\u1ed9t b\u1ea3ng m\u1ea1ch xu\u1ed1ng, sau \u0111\u00f3 l\u1ed3ng gh\u00e9p b\u1ea3ng m\u1ea1ch kh\u00e1c ph\u00eda tr\u00ean \u2014 kh\u00f4ng c\u1ea7n \u0111ai \u1ed1c ri\u00eang.<\/p>\n<h3>V\u1eadt c\u00e1ch ly \u0111\u0129a ph\u1eb3ng \/ Washer (V\u1eadt c\u00e1ch ly \u0111\u1ec7m)<\/h3>\n<p><img decoding=\"async\" class=\"alignnone wp-image-4350 size-large\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1-800x533.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1-800x533.png 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1-360x240.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1-150x100.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1-768x512.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1-18x12.png 18w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/image-1.png 1536w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>V\u1eadt c\u00e1ch ly nh\u1ef1a ph\u1eb3ng \u2014 \u0111\u00f4i khi g\u1ecdi l\u00e0 washer c\u00e1ch ly ho\u1eb7c shim washer \u2014 c\u00f3 d\u1ea1ng \u0111\u0129a v\u1edbi l\u1ed7 trung t\u00e2m. \u0110\u1ed9 d\u00e0y dao \u0111\u1ed9ng t\u1eeb 0.1 mm \u0111\u1ebfn 5 mm; OD thay \u0111\u1ed5i theo \u1ee9ng d\u1ee5ng.<\/p>\n<p>Kh\u00e1c v\u1edbi v\u1eadt c\u00e1ch ly h\u00ecnh tr\u00f2n l\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch tr\u1ee5c, v\u1eadt c\u00e1ch ly ph\u1eb3ng:<br \/>\n&#8211; <strong>\u0110i\u1ec1u ch\u1ec9nh chi\u1ec1u cao l\u1eafp r\u00e1p cu\u1ed1i c\u00f9ng<\/strong> b\u1eb1ng c\u00e1ch x\u1ebfp ch\u1ed3ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c kho\u1ea3ng c\u00e1ch kh\u00f4ng ti\u00eau chu\u1ea9n<br \/>\n&#8211; <strong>B\u1ea3o v\u1ec7 c\u00e1c b\u1ec1 m\u1eb7t m\u1ec1m<\/strong> t\u1eeb m\u00e1y gi\u1eb7t c\u1eafn d\u01b0\u1edbi <a href=\"https:\/\/productionscrews.com\/vi\/cylindrical-head-bolts\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1152\">\u0111\u1ea7u bu l\u00f4ng<\/a><br \/>\n&#8211; <strong>C\u00e1ch ly \u0111i\u1ec7n<\/strong> m\u1ed9t \u0111\u1ea7u bu l\u00f4ng kh\u1ecfi b\u1ec1 m\u1eb7t d\u1eabn \u0111i\u1ec7n<\/p>\n<p>Theo <a href=\"https:\/\/www.engineeringtoolbox.com\/\" target=\"_blank\" rel=\"noopener\">D\u1eef li\u1ec7u v\u1ec1 dung sai c\u01a1 kh\u00ed c\u1ee7a Engineering ToolBox<\/a>, x\u1ebfp ch\u1ed3ng c\u00e1c mi\u1ebfng \u0111\u1ec7m ph\u1eb3ng l\u00e0 k\u1ef9 thu\u1eadt h\u1ee3p l\u1ec7 v\u00e0 ph\u1ed5 bi\u1ebfn \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb kho\u1ea3ng c\u00e1ch t\u00f9y ch\u1ec9nh m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1eb7t h\u00e0ng c\u00e1c mi\u1ebfng \u0111\u1ec7m h\u00ecnh tr\u1ee5 d\u00e0i t\u00f9y ch\u1ec9nh \u2014 ti\u1ebft ki\u1ec7m th\u1eddi gian ch\u1ebf t\u1ea1o nguy\u00ean m\u1eabu.<\/p>\n<h3>Mi\u1ebfng \u0111\u1ec7m ren (Ch\u1ed1ng \u0111\u1ee9ng nam-n\u1eef)<\/h3>\n<p>Mi\u1ebfng \u0111\u1ec7m ren t\u00edch h\u1ee3p ch\u1ee9c n\u0103ng b\u1eaft v\u00edt v\u00e0o ch\u00ednh mi\u1ebfng \u0111\u1ec7m. M\u1ed9t ch\u1ed1ng \u0111\u1ee9ng nam-n\u1eef c\u00f3 m\u1ed9t \u0111\u1ea7u ren nam (v\u1eb7n v\u00e0o l\u1ed7 \u0111\u00e3 c\u00f3 ren) v\u00e0 m\u1ed9t \u0111\u1ea7u ren n\u1eef (ch\u1ee9a v\u00edt t\u1eeb ph\u00eda tr\u00ean). \u0110i\u1ec1u n\u00e0y t\u1ea1o th\u00e0nh m\u1ed9t c\u1ed9t r\u1eafn ch\u1eafc, c\u00f3 th\u1ec3 truy c\u1eadp d\u1ee5ng c\u1ee5 m\u00e0 kh\u00f4ng c\u1ea7n \u0111ai \u1ed1c ri\u00eang bi\u1ec7t.<\/p>\n<p>\u01afu \u0111i\u1ec3m:<br \/>\n\u2013 C\u1ea5u tr\u00fac \u2014 mi\u1ebfng \u0111\u1ec7m ch\u1ecbu l\u1ef1c k\u00e9o v\u00e0 n\u00e9n m\u00e0 kh\u00f4ng c\u1ea7n bu l\u00f4ng ri\u00eang<br \/>\n\u2013 C\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng \u2014 c\u00f3 th\u1ec3 th\u00e1o r\u1eddi m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng ch\u1ed1ng \u0111\u1ee9ng<br \/>\n\u2013 X\u1ebfp ch\u1ed3ng \u0111i\u1ec1u ch\u1ec9nh \u2014 c\u00f3 th\u1ec3 th\u00eam ch\u1ed1ng \u0111\u1ee9ng \u0111\u1ec3 c\u1ea5u h\u00ecnh cao h\u01a1n<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i<\/th>\n<th>C\u1ea5u h\u00ecnh<\/th>\n<th>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tr\u00f2n, l\u1ed7 tr\u01a1n<\/td>\n<td>Ch\u01b0a ren, v\u1eeba kh\u00edt tr\u01b0\u1ee3t<\/td>\n<td>L\u1eafp r\u00e1p nhanh qua bu l\u00f4ng<\/td>\n<\/tr>\n<tr>\n<td>Mi\u1ebfng \u0111\u1ec7m h\u00ecnh l\u1ee5c gi\u00e1c<\/td>\n<td>Ch\u01b0a ren, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i h\u00ecnh l\u1ee5c gi\u00e1c<\/td>\n<td>C\u00e1c m\u1ed1i n\u1ed1i ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn, c\u00f4ng vi\u1ec7c PCB<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u0129a ph\u1eb3ng \/ washer<\/td>\n<td>\u0110\u0129a m\u1ecfng kh\u00f4ng ren<\/td>\n<td>L\u00e0m m\u1ecfng, b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ed1ng \u0111\u1ee9ng nam-n\u1eef<\/td>\n<td>C\u00f3 ren hai \u0111\u1ea7u<\/td>\n<td>X\u1ebfp ch\u1ed3ng PCB, g\u1eafn thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ed1ng \u0111\u1ee9ng n\u1eef-n\u1eef<\/td>\n<td>C\u00f3 ren n\u1eef hai \u0111\u1ea7u<\/td>\n<td>L\u1eafp r\u00e1p xuy\u00ean qua c\u1ea7n \u0111\u1ed9 cao c\u1ea7n thi\u1ebft<\/td>\n<\/tr>\n<tr>\n<td>Kho\u1ea3ng c\u00e1ch vai<\/td>\n<td>Vai tr\u01a1n, \u0111\u1ea7u c\u00f3 flange<\/td>\n<td>Tr\u1ee5c quay, \u0111i\u1ec3m b\u1ea3n l\u1ec1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>So s\u00e1nh v\u1eadt li\u1ec7u l\u00e0m Spacer nh\u1ef1a<\/h2>\n<p><strong><a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-alloy-steel-screws-raw-material-selection-for-maximum-strength\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1153\">L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u<\/a> x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi nhi\u1ec7t, kh\u1ea3 n\u0103ng ch\u1ed1ng h\u00f3a ch\u1ea5t, t\u1ea3i tr\u1ecdng t\u1ed1i \u0111a v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc \u2014 b\u1ed1n bi\u1ebfn s\u1ed1 ph\u00e2n bi\u1ec7t m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c v\u1edbi s\u1ef1 c\u1ed1 trong th\u1ef1c t\u1ebf.<\/strong><\/p>\n<p>Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 nh\u1ef1a \u0111\u1ec1u gi\u1ed1ng nhau. M\u1ed9t spacer nylon ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong h\u1ed9p \u0111i\u1ec7n t\u1eed kh\u00f4 s\u1ebd h\u00fat \u1ea9m v\u00e0 ph\u1ed3ng l\u00ean trong \u1ee9ng d\u1ee5ng b\u01a1m n\u01b0\u1edbc bi\u1ec3n. M\u1ed9t spacer acetal gi\u1eef \u0111\u1ed9 ch\u00ednh x\u00e1c trong thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c s\u1ebd n\u1ee9t d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a tia UV tr\u00ean m\u00e1i nh\u00e0 n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi n\u1ebfu b\u1ea1n ch\u1ecdn lo\u1ea1i kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n<h3>Spacer Nylon (PA6 \/ PA66)<\/h3>\n<p>Nylon l\u00e0 v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t cho spacer nh\u1ef1a. N\u00f3 cung c\u1ea5p s\u1ef1 c\u00e2n b\u1eb1ng tuy\u1ec7t v\u1eddi gi\u1eefa \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 dai v\u00e0 chi ph\u00ed.<\/p>\n<p>C\u00e1c \u0111\u1eb7c t\u00ednh ch\u00ednh:<br \/>\n&#8211; <strong>\u0110\u1ed9 b\u1ec1n n\u00e9n<\/strong>: 80\u2013100 MPa (PA66)<br \/>\n&#8211; <strong>Nhi\u1ec7t \u0111\u1ed9 d\u1ecbch v\u1ee5<\/strong>: -40\u00b0C \u0111\u1ebfn 120\u00b0C li\u00ean t\u1ee5c<br \/>\n&#8211; <strong>C\u00e1ch \u0111i\u1ec7n<\/strong>: \u0111i\u1ec7n tr\u1edf su\u1ea5t th\u1ec3 t\u00edch 10\u00b9\u00b2\u201310\u00b9\u00b3 \u03a9\u00b7cm<br \/>\n&#8211; <strong>H\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/strong>: 2\u20134% theo tr\u1ecdng l\u01b0\u1ee3ng (PA6 h\u1ea5p th\u1ee5 nhi\u1ec1u h\u01a1n PA66)<\/p>\n<p>L\u01b0u \u00fd v\u1ec1 \u0111\u1ed9 \u1ea9m l\u00e0 c\u00f3 th\u1eadt. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m c\u00e1c b\u1ed9 c\u00e1ch nhi\u1ec7t PA6 trong bu\u1ed3ng \u1ea9m (85% RH, 85\u00b0C trong 72 gi\u1edd), \u0111\u00e3 \u0111o \u0111\u01b0\u1ee3c s\u1ef1 bi\u1ebfn \u0111\u1ed5i k\u00edch th\u01b0\u1edbc t\u1eeb 0.3\u20130.5% \u2014 \u0111\u1ee7 \u0111\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c b\u1ed9 l\u1eafp gh\u00e9p c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao. Trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 \u0111\u1ed9 \u1ea9m cao, nylon ch\u1ee9a s\u1ee3i th\u1ee7y tinh (PA66-GF30) gi\u1ea3m \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m \u0111\u1ed3ng th\u1eddi t\u0103ng c\u01b0\u1eddng s\u1ee9c ch\u1ecbu n\u00e9n l\u00ean tr\u00ean 160 MPa.<\/p>\n<p>Ph\u00f9 h\u1ee3p nh\u1ea5t cho: \u0111i\u1ec7n t\u1eed, n\u1ed9i th\u1ea5t \u00f4 t\u00f4, c\u00e1c b\u1ed9 l\u1eafp gh\u00e9p c\u00f4ng nghi\u1ec7p chung trong m\u00f4i tr\u01b0\u1eddng ki\u1ec3m so\u00e1t.<\/p>\n<h3>V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t (Spacers) Acetal (Delrin\u00ae)<\/h3>\n<p>Acetal \u2014 \u0111\u01b0\u1ee3c th\u1ecb tr\u01b0\u1eddng bi\u1ebft \u0111\u1ebfn d\u01b0\u1edbi th\u01b0\u01a1ng hi\u1ec7u Delrin c\u1ee7a DuPont cho c\u00e1c lo\u1ea1i polymer \u0111\u1ed3ng nh\u1ea5t \u2014 l\u00e0 lo\u1ea1i polymer \u0111\u01b0\u1ee3c c\u00e1c k\u1ef9 s\u01b0 ch\u00ednh x\u00e1c \u01b0a chu\u1ed9ng khi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc quan tr\u1ecdng h\u01a1n chi ph\u00ed.<\/p>\n<p>C\u00e1c \u0111\u1eb7c t\u00ednh ch\u00ednh:<br \/>\n&#8211; <strong>\u0110\u1ed9 b\u1ec1n n\u00e9n<\/strong>: 110\u2013130 MPa<br \/>\n&#8211; <strong>H\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/strong>: &lt; 0.25% (th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi nylon)<br \/>\n&#8211; <strong>Nhi\u1ec7t \u0111\u1ed9 d\u1ecbch v\u1ee5<\/strong>: -40\u00b0C \u0111\u1ebfn 90\u00b0C li\u00ean t\u1ee5c (\u00edt h\u01a1n nylon \u1edf m\u1ee9c cao nh\u1ea5t)<br \/>\n&#8211; <strong>Kh\u1ea3 n\u0103ng gia c\u00f4ng<\/strong>: xu\u1ea5t s\u1eafc \u2014 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c \u00b10.025 mm m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady<\/p>\n<p>Kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m g\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng c\u1ee7a acetal c\u00f3 ngh\u0129a l\u00e0 n\u00f3 gi\u1eef nguy\u00ean k\u00edch th\u01b0\u1edbc trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt n\u01a1i nylon s\u1ebd b\u1ecb bi\u1ebfn d\u1ea1ng. N\u00f3 c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ec7t m\u1ecfi tuy\u1ec7t v\u1eddi v\u00e0 b\u1ec1 m\u1eb7t t\u1ef1 nhi\u00ean tr\u01a1n tr\u01b0\u1ee3t \u2014 h\u1eefu \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00e1ch nhi\u1ec7t n\u01a1i c\u00f3 s\u1ef1 d\u1ecbch chuy\u1ec3n nh\u1eb9.<\/p>\n<p>H\u1ea1n ch\u1ebf: acetal kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi ti\u1ebfp x\u00fac li\u00ean t\u1ee5c tr\u00ean 90\u00b0C, v\u00e0 n\u00f3 ph\u00e2n h\u1ee7y trong axit m\u1ea1nh. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ti\u1ebfp x\u00fac v\u1edbi axit, PTFE l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t h\u01a1n.<\/p>\n<p>Ph\u00f9 h\u1ee3p nh\u1ea5t cho: d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c, x\u1eed l\u00fd ch\u1ea5t l\u1ecfng, m\u00f4i tr\u01b0\u1eddng c\u00f3 chu k\u1ef3 \u0111\u1ed9 \u1ea9m, b\u1ea5t k\u1ef3 b\u1ed9 l\u1eafp gh\u00e9p n\u00e0o m\u00e0 s\u1ef1 d\u1ecbch chuy\u1ec3n k\u00edch th\u01b0\u1edbc g\u00e2y ra l\u1ed7i c\u0103n ch\u1ec9nh.<\/p>\n<h3>V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t (Spacers) Polyethylene (HDPE \/ UHMWPE) v\u00e0 Polypropylene<\/h3>\n<p>HDPE v\u00e0 polypropylene l\u00e0 nh\u1eefng v\u1eadt li\u1ec7u ch\u1ed1ng ch\u1ecbu ho\u00e1 ch\u1ea5t xu\u1ea5t s\u1eafc trong s\u1ed1 c\u00e1c lo\u1ea1i polymer k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn.<\/p>\n<ul>\n<li><strong>Kh\u00e1ng h\u00f3a ch\u1ea5t<\/strong>: xu\u1ea5t s\u1eafc ch\u1ed1ng l\u1ea1i axit, ki\u1ec1m, c\u1ed3n, v\u00e0 h\u1ea7u h\u1ebft dung m\u00f4i<\/li>\n<li><strong>Chi ph\u00ed<\/strong>: th\u1ea5p nh\u1ea5t trong s\u1ed1 c\u00e1c lo\u1ea1i polymer k\u1ef9 thu\u1eadt<\/li>\n<li><strong>\u0110\u1ed9 b\u1ec1n n\u00e9n<\/strong>: 20\u201340 MPa (th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi nylon ho\u1eb7c acetal)<\/li>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9<\/strong>: polypropylene \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 ch\u1ecbu nhi\u1ec7t \u0111\u1ebfn 100\u00b0C; UHMWPE \u0111\u1ebfn 80\u00b0C<\/li>\n<\/ul>\n<p>Nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y ph\u00f9 h\u1ee3p khi chi ph\u00ed v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng h\u00f3a ch\u1ea5t chi\u1ebfm \u01b0u th\u1ebf trong y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt v\u00e0 t\u1ea3i tr\u1ecdng th\u1ea5p. Ch\u00fang ph\u1ed5 bi\u1ebfn trong thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m, h\u1ec7 th\u1ed1ng x\u1eed l\u00fd n\u01b0\u1edbc v\u00e0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, n\u01a1i th\u01b0\u1eddng xuy\u00ean s\u1eed d\u1ee5ng dung d\u1ecbch l\u00e0m s\u1ea1ch h\u00f3a h\u1ecdc.<\/p>\n<p>M\u1ed9t \u0111\u1eb7c t\u00ednh \u00edt \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao: <a href=\"https:\/\/en.wikipedia.org\/wiki\/Ultra-high-molecular-weight_polyethylene\" target=\"_blank\" rel=\"noopener\">\u0110\u1ed9 tr\u01b0\u1ee3t c\u1ef1c th\u1ea5p c\u1ee7a UHMWPE<\/a>, kho\u1ea3ng 0.05\u20130.10, khi\u1ebfn n\u00f3 h\u1eefu \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00e1ch nhi\u1ec7t tr\u01b0\u1ee3t n\u01a1i b\u1ed9 c\u00e1ch nhi\u1ec7t di chuy\u1ec3n ch\u1ed1ng l\u1ea1i b\u1ec1 m\u1eb7t kh\u00e1c trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p>\n<p>Ph\u00f9 h\u1ee3p nh\u1ea5t cho: x\u1eed l\u00fd h\u00f3a ch\u1ea5t, thi\u1ebft b\u1ecb n\u01b0\u1edbc\/x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i, d\u1ecbch v\u1ee5 th\u1ef1c ph\u1ea9m, l\u1eafp r\u00e1p ph\u00f2ng th\u00ed nghi\u1ec7m.<\/p>\n<h3>C\u00e1c b\u1ed9 c\u00e1ch nhi\u1ec7t PTFE v\u00e0 Polymer Hi\u1ec7u Su\u1ea5t Cao<\/h3>\n<p>\u1ede m\u1ee9c cao nh\u1ea5t c\u1ee7a ph\u1ea1m vi l\u00e0 c\u00e1c b\u1ed9 c\u00e1ch nhi\u1ec7t PTFE (Teflon), PEEK, v\u00e0 PPS. Ch\u00fang c\u00f3 gi\u00e1 th\u00e0nh cao h\u01a1n \u0111\u00e1ng k\u1ec3 nh\u01b0ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111i\u1ec1u ki\u1ec7n m\u00e0 c\u00e1c polymer k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n kh\u00f4ng th\u1ec3 x\u1eed l\u00fd.<\/p>\n<ul>\n<li><strong>PTFE<\/strong>: ch\u1ecbu nhi\u1ec7t li\u00ean t\u1ee5c \u0111\u1ebfn 260\u00b0C, t\u00ednh tr\u01a1 h\u00f3a h\u1ecdc c\u1ef1c cao, \u0111\u1ed9 tr\u01b0\u1ee3t th\u1ea5p nh\u1ea5t c\u1ee7a b\u1ea5t k\u1ef3 v\u1eadt li\u1ec7u r\u1eafn n\u00e0o. S\u1eed d\u1ee5ng trong thi\u1ebft b\u1ecb b\u00e1n d\u1eabn, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, v\u00e0 m\u00f4i tr\u01b0\u1eddng h\u00f3a ch\u1ea5t kh\u1eafc nghi\u1ec7t.<\/li>\n<li><strong>PEEK<\/strong>: \u0111\u1ed9 b\u1ec1n n\u00e9n 120\u2013140 MPa, ch\u1ecbu nhi\u1ec7t \u0111\u1ebfn 250\u00b0C, kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ec7t m\u1ecfi xu\u1ea5t s\u1eafc. Th\u01b0\u1eddng d\u00f9ng l\u00e0m b\u1ed9 c\u00e1ch nhi\u1ec7t c\u1ea5u tr\u00fac trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao \u2014 thi\u1ebft b\u1ecb y t\u1ebf, d\u1ee5ng c\u1ee5 d\u1ea7u kh\u00ed, \u1ed1c v\u00edt h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5. Theo <a href=\"https:\/\/www.astm.org\/d6484_d6484m-14.html\" target=\"_blank\" rel=\"noopener\">ti\u00eau chu\u1ea9n th\u1eed nghi\u1ec7m ASTM D6484<\/a>, \u0111\u1ed9 b\u1ec1n n\u00e9n l\u1ed7 m\u1edf c\u1ee7a PEEK v\u01b0\u1ee3t xa h\u1ea7u h\u1ebft c\u00e1c polymer kh\u00f4ng gia c\u1ed1.<\/li>\n<li><strong>PPS (Polyphenylene Sulfide)<\/strong>: xu\u1ea5t s\u1eafc \u1edf 220\u00b0C li\u00ean t\u1ee5c, t\u1ef1 nhi\u00ean ch\u1ed1ng ch\u00e1y (UL94 V-0), \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u01b0\u1ee3t tr\u1ed9i. S\u1eed d\u1ee5ng trong \u0111i\u1ec7n t\u1eed y\u00eau c\u1ea7u tu\u00e2n th\u1ee7 UL.<\/li>\n<\/ul>\n<p>Ph\u00f9 h\u1ee3p nh\u1ea5t cho: h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, b\u00e1n d\u1eabn, y t\u1ebf, d\u1ea7u kh\u00ed, \u0111i\u1ec7n t\u1eed nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n<hr \/>\n<h2>C\u00e1ch ch\u1ecdn b\u1ed9 c\u00e1ch nhi\u1ec7t nh\u1ef1a ph\u00f9 h\u1ee3p<\/h2>\n<p><strong>Ch\u1ecdn b\u1ed9 c\u00e1ch nhi\u1ec7t nh\u1ef1a b\u1eb1ng c\u00e1ch l\u00e0m theo b\u1ed1n ti\u00eau ch\u00ed theo th\u1ee9 t\u1ef1: t\u1ea3i tr\u1ecdng, nhi\u1ec7t \u0111\u1ed9, m\u00f4i tr\u01b0\u1eddng h\u00f3a ch\u1ea5t, v\u00e0 dung sai k\u00edch th\u01b0\u1edbc \u2014 theo th\u1ee9 t\u1ef1 \u0111\u00f3.<\/strong><\/p>\n<p>N\u1ebfu ch\u1ecdn sai t\u1ea3i tr\u1ecdng, b\u1ed9 c\u00e1ch nhi\u1ec7t b\u1ecb nghi\u1ec1n n\u00e1t. N\u1ebfu ch\u1ecdn sai nhi\u1ec7t \u0111\u1ed9, n\u00f3 s\u1ebd b\u1ecb ch\u1ea3y ho\u1eb7c bi\u1ebfn d\u1ea1ng. N\u1ebfu ch\u1ecdn sai h\u00f3a ch\u1ea5t, n\u00f3 s\u1ebd ph\u1ed3ng l\u00ean ho\u1eb7c n\u1ee9t. Ch\u1ec9 khi \u0111\u00f3 m\u1edbi quan tr\u1ecdng \u0111\u1ebfn dung sai k\u00edch th\u01b0\u1edbc, v\u00ec t\u1ea5t c\u1ea3 c\u00e1c y\u1ebfu t\u1ed1 tr\u00ean \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc cu\u1ed1i c\u00f9ng khi s\u1eed d\u1ee5ng.<\/p>\n<h3>T\u1ea3i tr\u1ecdng, \u1ee9ng su\u1ea5t v\u00e0 dung sai k\u00edch th\u01b0\u1edbc<\/h3>\n<p>T\u1ea3i tr\u1ecdng n\u00e9n tr\u00ean m\u1ed7i b\u1ed9 c\u00e1ch nhi\u1ec7t = t\u1ed5ng l\u1ef1c k\u1eb9p m\u1ed1i n\u1ed1i \u00f7 s\u1ed1 l\u01b0\u1ee3ng b\u1ed9 c\u00e1ch nhi\u1ec7t. Th\u00eam y\u1ebfu t\u1ed1 an to\u00e0n g\u1ea5p 2\u20133 l\u1ea7n cho t\u1ea3i tr\u1ecdng \u0111\u1ed9ng.<\/p>\n<p>H\u1ea7u h\u1ebft c\u00e1c spacers nh\u1ef1a \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 ch\u1ecbu t\u1ea3i n\u00e9n. N\u1ebfu b\u1ea1n c\u00f3 t\u1ea3i tr\u1ecdng t\u00e1c \u0111\u1ed9ng (g\u1eadp), ph\u1ea7n m\u1eb7t c\u1eaft ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ed1ng l\u1ea1i n\u00f3 \u2014 c\u00e1c m\u1eb7t c\u1eaft h\u00ecnh tr\u00f2n k\u00e9m hi\u1ec7u qu\u1ea3 trong vi\u1ec7c ch\u1ecbu u\u1ed1n. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, h\u00e3y xem x\u00e9t c\u00e1c profile nh\u1ef1a vu\u00f4ng ho\u1eb7c ch\u1eef nh\u1eadt c\u1eaft theo chi\u1ec1u d\u00e0i, ho\u1eb7c m\u1ed9t spacer c\u00f3 vai c\u00f3 flange.<\/p>\n<p><strong>Ghi ch\u00fa chu\u1ed7i dung sai<\/strong>: spacers nh\u1ef1a c\u00f3 dung sai r\u1ed9ng h\u01a1n so v\u1edbi kim lo\u1ea1i. C\u00e1c spacers nylon \u0111\u00fac th\u00f4ng th\u01b0\u1eddng c\u00f3 dung sai \u00b10.1\u20130.2 mm v\u1ec1 chi\u1ec1u d\u00e0i. N\u1ebfu b\u1ea1n c\u1ea7n \u00b10.05 mm, h\u00e3y ch\u1ec9 \u0111\u1ecbnh d\u00f9ng acetal gia c\u00f4ng. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y quan tr\u1ecdng trong c\u00e1c b\u1ed9 l\u1eafp r\u00e1p quang h\u1ecdc, gi\u00e1 \u0111\u1ee1 c\u1ea3m bi\u1ebfn, v\u00e0 b\u1ea5t k\u1ef3 m\u1ed1i gh\u00e9p n\u00e0o y\u00eau c\u1ea7u c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c.<\/p>\n<h3>Kh\u1ea3 n\u0103ng ch\u1ed1ng ho\u00e1 ch\u1ea5t v\u00e0 y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>Ph\u00f9 h\u1ee3p v\u1eadt li\u1ec7u spacer v\u1edbi lo\u1ea1i ho\u00e1 ch\u1ea5t t\u1ed3i t\u1ec7 nh\u1ea5t m\u00e0 n\u00f3 s\u1ebd ti\u1ebfp x\u00fac \u2014 kh\u00f4ng ph\u1ea3i lo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t. M\u1ed9t spacer nylon trong h\u1ed9p pin ph\u1ea3i ch\u1ed1ng l\u1ea1i s\u1ef1 b\u1eafn electrolyte ngay c\u1ea3 khi m\u00f4i tr\u01b0\u1eddng b\u00ecnh th\u01b0\u1eddng kh\u00f4 r\u00e1o.<\/p>\n<p>C\u00e1c kh\u1ea3 n\u0103ng ch\u1ed1ng ho\u00e1 ch\u1ea5t ch\u00ednh trong m\u1ed9t c\u00e1i nh\u00ecn:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ho\u00e1 ch\u1ea5t \/ M\u00f4i tr\u01b0\u1eddng<\/th>\n<th>Nylon<\/th>\n<th>Acetal<\/th>\n<th>HDPE\/PP<\/th>\n<th>PTFE<\/th>\n<th>PEEK<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Axit lo\u00e3ng<\/td>\n<td>Ph\u00f9 h\u1ee3p<\/td>\n<td>T\u1ed1t<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td>Axit \u0111\u1eb7c<\/td>\n<td>Kh\u00f4ng ph\u00f9 h\u1ee3p<\/td>\n<td>Ph\u00f9 h\u1ee3p<\/td>\n<td>T\u1ed1t<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>Ki\u1ec1m (baz m\u1ea1nh)<\/td>\n<td>T\u1ed1t<\/td>\n<td>Ph\u00f9 h\u1ee3p<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>Hydrocarbon \/ d\u1ea7u m\u1ee1<\/td>\n<td>T\u1ed1t<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>T\u1ed1t<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td>UV (ti\u1ebfp x\u00fac ngo\u00e0i tr\u1eddi)<\/td>\n<td>Kh\u00f4ng ph\u00f9 h\u1ee3p<\/td>\n<td>Kh\u00f4ng ph\u00f9 h\u1ee3p<\/td>\n<td>C\u00e1c lo\u1ea1i ch\u1ed1ng tia UV \u1ed5n \u0111\u1ecbnh<\/td>\n<td>T\u1ed1t<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>H\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>Very low<\/td>\n<td>Very low<\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td>Very low<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi ti\u1ebfp x\u00fac v\u1edbi UV \u2014 gi\u00e1 \u0111\u1ee1 pin m\u1eb7t tr\u1eddi, thi\u1ebft b\u1ecb n\u00f4ng nghi\u1ec7p, ph\u1ea7n c\u1ee9ng bi\u1ec3n hi\u1ec7u \u2014 h\u00e3y ch\u1ec9 \u0111\u1ecbnh c\u00e1c lo\u1ea1i ch\u1ed1ng tia UV \u1ed5n \u0111\u1ecbnh. Nylon v\u00e0 acetal ti\u00eau chu\u1ea9n s\u1ebd b\u1ecb ph\u1ea5n h\u00f3a, n\u1ee9t v\u00e0 m\u1ea5t t\u00ednh to\u00e0n v\u1eb9n k\u00edch th\u01b0\u1edbc trong v\u00f2ng 12\u201324 th\u00e1ng ti\u1ebfp x\u00fac li\u00ean t\u1ee5c ngo\u00e0i tr\u1eddi. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p spacer nh\u1ef1a cung c\u1ea5p nylon ch\u1ed1ng tia UV \u0111en \u0111\u1eb7c bi\u1ec7t cho m\u1ee5c \u0111\u00edch n\u00e0y.<\/p>\n<h3>Xem x\u00e9t m\u1edf r\u1ed9ng nhi\u1ec7t<\/h3>\n<p>C\u00e1c spacers nh\u1ef1a c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t (CTE) cao h\u01a1n nhi\u1ec1u so v\u1edbi kim lo\u1ea1i. CTE c\u1ee7a th\u00e9p kho\u1ea3ng 12 \u00b5m\/m\u00b7\u00b0C. CTE c\u1ee7a nylon l\u00e0 80\u201390 \u00b5m\/m\u00b7\u00b0C \u2014 g\u1ea5p b\u1ea3y l\u1ea7n.<\/p>\n<p>Trong m\u1ed9t dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 100\u00b0C, m\u1ed9t spacer nylon d\u00e0i 50 mm s\u1ebd gi\u00e3n ra 0.4\u20130.45 mm theo chi\u1ec1u tr\u1ee5c. Trong m\u1ed9t m\u1ed1i gh\u00e9p c\u1ee9ng c\u1ed1 \u0111\u1ecbnh, \u0111i\u1ec1u n\u00e0y t\u1ea1o ra \u1ee9ng su\u1ea5t l\u00ean c\u1ea5u tr\u00fac xung quanh. Trong m\u1ed9t m\u1ed1i gh\u00e9p t\u1ef1 do, n\u00f3 thay \u0111\u1ed5i khe h\u1edf.<\/p>\n<p>C\u00e1c chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u:<br \/>\n\u2013 S\u1eed d\u1ee5ng lo\u1ea1i v\u1eadt li\u1ec7u ch\u1ee9a k\u00ednh (GF30) \u2014 gi\u1ea3m CTE t\u1eeb 30\u201340% %<br \/>\n\u2013 Ch\u1ec9 \u0111\u1ecbnh acetal khi CTE quan tr\u1ecdng h\u01a1n kh\u1ea3 n\u0103ng ch\u1ed1ng \u1ea9m<br \/>\n\u2013 Thi\u1ebft k\u1ebf m\u1ed9t kh\u1edbp tr\u01b0\u1ee3t ki\u1ec3m so\u00e1t \u0111\u1ec3 kho\u1ea3ng c\u00e1ch c\u00f3 th\u1ec3 di chuy\u1ec3n theo tr\u1ee5c d\u01b0\u1edbi t\u1ea3i nhi\u1ec7t m\u00e0 kh\u00f4ng t\u1ea1o ra \u1ee9ng su\u1ea5t<br \/>\n\u2013 \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9 l\u1eafp gh\u00e9p kim lo\u1ea1i v\u1edbi nh\u1ef1a tr\u1ea3i d\u00e0i tr\u00ean ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng, t\u00ednh to\u00e1n s\u1ef1 gi\u00e3n n\u1edf ch\u00eanh l\u1ec7ch v\u00e0 \u0111i\u1ec1u ch\u1ec9nh khe h\u1edf ph\u00f9 h\u1ee3p<\/p>\n<blockquote><p><strong>Nguy\u00ean t\u1eafc chung<\/strong>: n\u1ebfu b\u1ed9 l\u1eafp gh\u00e9p c\u1ee7a b\u1ea1n ch\u1ecbu s\u1ef1 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 h\u01a1n 60\u00b0C v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c tr\u1ee5c ch\u1eb7t ch\u1ebd l\u00e0 quan tr\u1ecdng, h\u00e3y th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n m\u1edf r\u1ed9ng tr\u01b0\u1edbc khi ch\u1ec9 \u0111\u1ecbnh. Kho\u1ea3ng \u00b10.1 mm b\u1ea1n ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c khi d\u00f9ng spacer r\u1ebb h\u01a1n c\u00f3 th\u1ec3 khi\u1ebfn b\u1ea1n ph\u1ea3i l\u00e0m l\u1ea1i g\u1ea5p \u0111\u00f4i khi b\u1ed9 l\u1eafp gh\u00e9p b\u1ecb k\u1eb9t \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan.<\/p><\/blockquote>\n<hr \/>\n<h2>\u1ee8ng d\u1ee5ng trong ng\u00e0nh c\u1ee7a c\u00e1c Spacer nh\u1ef1a<\/h2>\n<p><strong>C\u00e1c spacer nh\u1ef1a xu\u1ea5t hi\u1ec7n trong h\u1ea7u h\u1ebft c\u00e1c ng\u00e0nh s\u1ea3n xu\u1ea5t \u2014 t\u1eeb \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng \u0111\u1ebfn h\u1ea1 t\u1ea7ng n\u1eb7ng \u2014 b\u1edfi v\u00ec kh\u00f4ng th\u00e0nh ph\u1ea7n n\u00e0o kh\u00e1c c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t khe h\u1edf, c\u00e1ch \u0111i\u1ec7n v\u00e0 ch\u1ed1ng \u0103n m\u00f2n c\u00f9ng l\u00fac v\u1edbi chi ph\u00ed th\u1ea5p nh\u01b0 v\u1eady.<\/strong><\/p>\n<h3>\u0110i\u1ec7n t\u1eed v\u00e0 L\u1eafp r\u00e1p bo m\u1ea1ch in (PCB)<\/h3>\n<p>Ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n t\u1eed l\u00e0 ng\u01b0\u1eddi ti\u00eau th\u1ee5 spacer nh\u1ef1a l\u1edbn nh\u1ea5t to\u00e0n c\u1ea7u. Spacer x\u1ebfp ch\u1ed3ng PCB \u2014 th\u01b0\u1eddng l\u00e0 c\u00e1c ch\u00e2n nylon M3 h\u00ecnh l\u1ee5c gi\u00e1c \u2014 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb c\u00f3 nhi\u1ec1u bo m\u1ea1ch. Ch\u00fang c\u00e1ch \u0111i\u1ec7n c\u00e1c bo m\u1ea1ch, cung c\u1ea5p h\u1ed7 tr\u1ee3 c\u01a1 h\u1ecdc, v\u00e0 cho ph\u00e9p lu\u1ed3ng kh\u00f4ng kh\u00ed gi\u1eefa c\u00e1c l\u1edbp.<\/p>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng ch\u00ednh:<br \/>\n&#8211; <strong>L\u1eafp \u0111\u1eb7t PCB v\u00e0o khung<\/strong>: C\u00e1c ch\u00e2n nylon M3 \u00d7 5 mm ng\u0103n ch\u1eb7n u\u1ed1n cong bo m\u1ea1ch v\u00e0 gi\u1eef cho PCB c\u00e1ch \u0111i\u1ec7n v\u1edbi khung<br \/>\n&#8211; <strong>Spacer cu\u1ed9n d\u00e2y bi\u1ebfn \u00e1p<\/strong>: C\u00e1c spacer nh\u1ecf b\u1eb1ng PTFE ho\u1eb7c nylon duy tr\u00ec kho\u1ea3ng c\u00e1ch qu\u1ea5n d\u00e2y trong c\u00e1c bi\u1ebfn \u00e1p t\u1ea7n s\u1ed1 cao<br \/>\n&#8211; <strong>L\u1eafp \u0111\u1eb7t r\u01a1 le<\/strong>: C\u00e1c spacer gi\u1ea3m ch\u1ea5n rung d\u01b0\u1edbi ch\u00e2n l\u1eafp r\u01a1 le gi\u1ea3m ti\u1ebfng \u1ed3n \u00e2m thanh v\u00e0 m\u1ecfi do micro-movement<br \/>\n&#8211; <strong>L\u1eafp r\u00e1p b\u1ed9 pin<\/strong>: C\u00e1c spacer acetal ho\u1eb7c PP t\u00e1ch c\u00e1c t\u1ebf b\u00e0o v\u00e0 duy tr\u00ec c\u0103n ch\u1ec9nh d\u01b0\u1edbi chu k\u1ef3 nhi\u1ec7t<\/p>\n<p>M\u1ed9t chi ti\u1ebft th\u01b0\u1eddng b\u1ecb b\u1ecf qua: \u0111\u00e1nh gi\u00e1 m\u00f4-men xo\u1eafn c\u1ee7a c\u00e1c spacer nh\u1ef1a. V\u1eb7n qu\u00e1 ch\u1eb7t c\u00e1c ch\u00e2n nylon M3 s\u1ebd l\u00e0m tr\u00f3c ren ho\u1eb7c n\u1ee9t th\u00e2n. M\u00f4-men xo\u1eafn t\u1ed1i \u0111a \u0111i\u1ec3n h\u00ecnh cho c\u00e1c spacer M3 PA66 l\u00e0 0.4\u20130.6 N\u00b7m \u2014 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ee9c m\u00e0 tua v\u00edt \u0111i\u1ec7n cung c\u1ea5p \u1edf c\u00e0i \u0111\u1eb7t m\u1eb7c \u0111\u1ecbnh. Vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh b\u1ed9 ly h\u1ee3p m\u00f4-men xo\u1eafn l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n<h3>K\u1ef9 thu\u1eadt \u00d4 t\u00f4 v\u00e0 C\u01a1 kh\u00ed<\/h3>\n<p>Trong c\u00e1c b\u1ed9 ph\u1eadn l\u1eafp r\u00e1p \u00f4 t\u00f4, c\u00e1c mi\u1ebfng \u0111\u1ec7m nh\u1ef1a gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00e0 kim lo\u1ea1i kh\u00f4ng th\u1ec3. C\u00e1c \u1ee9ng d\u1ee5ng d\u01b0\u1edbi n\u1eafp \u0111\u1ed9ng c\u01a1 bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>C\u00e1ch ly k\u1ebft n\u1ed1i \u0111i\u1ec7n<\/strong>: Mi\u1ebfng \u0111\u1ec7m nylon trong c\u00e1c k\u1ebft n\u1ed1i h\u1ed9p d\u00e2y \u0111i\u1ec7n gi\u1eef kho\u1ea3ng c\u00e1ch v\u00e0 ng\u0103n ch\u1eb7n ch\u1eadp m\u1ea1ch n\u01a1i c\u00e1c d\u00e2y d\u1eabn \u0111i qua c\u00e1c t\u1ea5m kim lo\u1ea1i<\/li>\n<li><strong>Ch\u00e2n \u0111\u1ee1 \u0111\u01b0\u1eddng \u1ed1ng ch\u1ea5t l\u1ecfng<\/strong>: Mi\u1ebfng \u0111\u1ec7m HDPE ho\u1eb7c PP \u0111\u1ecbnh v\u1ecb c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng phanh, \u0111\u01b0\u1eddng nhi\u00ean li\u1ec7u v\u00e0 \u1ed1ng l\u00e0m m\u00e1t c\u00e1ch xa ngu\u1ed3n nhi\u1ec7t v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng<\/li>\n<li><strong>L\u1eafp \u0111\u1eb7t c\u1ea3m bi\u1ebfn<\/strong>: Mi\u1ebfng \u0111\u1ec7m acetal ch\u00ednh x\u00e1c \u0111\u1ecbnh v\u1ecb c\u1ea3m bi\u1ebfn Hall-effect \u1edf kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed \u0111\u00fang t\u1eeb b\u00e1nh xe k\u00edch ho\u1ea1t \u2014 th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 dung sai \u00b10.2 mm trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng<\/li>\n<li><strong>G\u1eafn c\u1ed1 \u0111\u1ecbnh n\u1ed9i th\u1ea5t<\/strong>: Mi\u1ebfng \u0111\u1ec7m nylon ch\u1ee9a s\u1ee3i th\u1ee7y tinh ph\u00eda sau c\u00e1c t\u1ea5m c\u1eeda v\u00e0 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n b\u1ea3ng \u0111\u1ed3ng h\u1ed3 gi\u1eef kho\u1ea3ng c\u00e1ch ch\u00ednh x\u00e1c kh\u1ecfi th\u00e2n xe, ng\u0103n ti\u1ebfng \u1ed3n l\u1ea1ch c\u1ea1ch<\/li>\n<\/ul>\n<p>Theo <a href=\"https:\/\/www.sae.org\/\" target=\"_blank\" rel=\"noopener\">T\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt c\u1ee7a Hi\u1ec7p h\u1ed9i K\u1ef9 s\u01b0 \u00d4 t\u00f4 v\u1ec1 ti\u00eau chu\u1ea9n th\u00e0nh ph\u1ea7n polymer<\/a>, kh\u1ea3 n\u0103ng ch\u1ed1ng l\u00e3o h\u00f3a nhi\u1ec7t l\u00e0 ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp nhi\u1ec1u nh\u1ea5t \u0111\u1ed1i v\u1edbi c\u00e1c mi\u1ebfng \u0111\u1ec7m nh\u1ef1a \u00f4 t\u00f4. SAE J2490 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c ch\u1ee9ng nh\u1eadn v\u1eadt li\u1ec7u polymer cho s\u1eed d\u1ee5ng d\u01b0\u1edbi n\u1eafp \u0111\u1ed9ng c\u01a1.<\/p>\n<h3>X\u00e2y d\u1ef1ng v\u00e0 C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng<\/h3>\n<p>Trong x\u00e2y d\u1ef1ng, c\u00e1c mi\u1ebfng \u0111\u1ec7m nh\u1ef1a ph\u1ee5c v\u1ee5 ch\u1ee9c n\u0103ng c\u1ea5u tr\u00fac: <strong>Mi\u1ebfng \u0111\u1ec7m gh\u1ebf ch\u1ed1ng \u0111\u1ee1 th\u00e9p c\u1ed1t th\u00e9p<\/strong> V\u1ecb tr\u00ed th\u00e9p c\u1ed1t th\u00e9p \u0111\u00fang \u0111\u1ed9 s\u00e2u trong khu\u00f4n \u0111\u00fac b\u00ea t\u00f4ng, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u00e0y l\u1edbp b\u1ea3o v\u1ec7 b\u00ea t\u00f4ng theo y\u00eau c\u1ea7u. \u0110i\u1ec1u n\u00e0y l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a th\u00e9p c\u1ed1t th\u00e9p.<\/p>\n<p>C\u00e1c mi\u1ebfng \u0111\u1ec7m ch\u1ed1ng \u0111\u1ee1 th\u00e9p c\u1ed1t th\u00e9p b\u1eb1ng nh\u1ef1a \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t v\u1edbi:<br \/>\n\u2013 H\u00ecnh d\u1ea1ng y\u00ean ng\u1ef1a \u0111\u1ec3 gi\u1eef ch\u1eb7t th\u00e9p c\u1ed1t th\u00e9p m\u00e0 kh\u00f4ng di chuy\u1ec3n trong qu\u00e1 tr\u00ecnh \u0111\u1ed5 b\u00ea t\u00f4ng<br \/>\n\u2013 C\u00f4ng su\u1ea5t ch\u1ecbu t\u1ea3i \u0111\u1ec3 h\u1ed7 tr\u1ee3 nhi\u1ec1u l\u1edbp th\u00e9p c\u1ed1t th\u00e9p m\u00e0 kh\u00f4ng b\u1ecb n\u1ee9t v\u1ee1<br \/>\n\u2013 Kh\u00e1ng h\u00f3a ch\u1ea5t trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m c\u1ee7a b\u00ea t\u00f4ng t\u01b0\u01a1i (pH 12\u201313)<\/p>\n<p>Polypropylene l\u00e0 v\u1eadt li\u1ec7u ti\u00eau chu\u1ea9n cho c\u00e1c mi\u1ebfng \u0111\u1ec7m gh\u1ebf ch\u1ed1ng \u0111\u1ee1 th\u00e9p c\u1ed1t th\u00e9p do kh\u1ea3 n\u0103ng ch\u1ed1ng ki\u1ec1m v\u00e0 chi ph\u00ed th\u1ea5p. C\u00e1c c\u1ea5u h\u00ecnh \u0111\u1ed9 d\u00e0y cao s\u1eed d\u1ee5ng PP ch\u1ee9a s\u1ee3i th\u1ee7y tinh.<\/p>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng x\u00e2y d\u1ef1ng kh\u00e1c:<br \/>\n&#8211; <strong>Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c t\u1ea5m \u1ed1p m\u1eb7t ti\u1ec1n<\/strong>: Kho\u1ea3ng c\u00e1ch EPDM ho\u1eb7c nylon ph\u00eda sau c\u00e1c t\u1ea5m \u1ed1p \u0111\u00e1 v\u00e0 nh\u00f4m cung c\u1ea5p khe tho\u00e1t n\u01b0\u1edbc v\u00e0 ng\u0103n ti\u1ebfp x\u00fac kim lo\u1ea1i tr\u1ef1c ti\u1ebfp g\u00e2y \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a<br \/>\n&#8211; <strong>Kho\u1ea3ng c\u00e1ch k\u00ednh c\u1eeda s\u1ed5 v\u00e0 c\u1eeda \u0111i<\/strong>: D\u1ea3i neoprene ho\u1eb7c nylon c\u1ee9ng gi\u1eef v\u1ecb tr\u00ed k\u00ednh v\u00e0 cho ph\u00e9p chuy\u1ec3n \u0111\u1ed9ng nhi\u1ec7t<br \/>\n&#8211; <strong>L\u1eafp \u0111\u1eb7t khung t\u1ea5m pin m\u1eb7t tr\u1eddi<\/strong>: Kho\u1ea3ng c\u00e1ch nylon \u1ed5n \u0111\u1ecbnh tia UV n\u00e2ng cao c\u00e1c t\u1ea5m tr\u00ean b\u1ec1 m\u1eb7t m\u00e1i nh\u00e0 \u0111\u1ec3 l\u01b0u th\u00f4ng kh\u00f4ng kh\u00ed v\u00e0 duy tr\u00ec kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c m\u00f4-\u0111un<\/p>\n<hr \/>\n<h2>Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai trong c\u00f4ng ngh\u1ec7 spacer nh\u1ef1a (2026+)<\/h2>\n<p><strong>Hai l\u1ef1c l\u01b0\u1ee3ng s\u1ebd \u0111\u1ecbnh h\u00ecnh l\u1ea1i th\u1ecb tr\u01b0\u1eddng spacer nh\u1ef1a v\u00e0o n\u0103m 2028: h\u1ee3p ch\u1ea5t polymer k\u1ef9 thu\u1eadt cao m\u1edf r\u1ed9ng ph\u1ea1m vi d\u1ecbch v\u1ee5, v\u00e0 s\u1ea3n xu\u1ea5t ph\u1ee5 gia t\u1ea1o h\u00ecnh cho ph\u00e9p c\u00e1c h\u00ecnh d\u1ea1ng t\u00f9y ch\u1ec9nh c\u00f3 kh\u1ea3 n\u0103ng kinh t\u1ebf trong s\u1ed1 l\u01b0\u1ee3ng nh\u1ecf.<\/strong><\/p>\n<h3>Ti\u1ebfn b\u1ed9 trong Polymer k\u1ef9 thu\u1eadt<\/h3>\n<p>Nylon ti\u00eau chu\u1ea9n v\u00e0 acetal ph\u00f9 h\u1ee3p v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng, nh\u01b0ng c\u00e1c kho\u1ea3ng tr\u1ed1ng trong ph\u1ea1m vi hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang \u0111ang th\u00fac \u0111\u1ea9y vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c h\u1ee3p ch\u1ea5t m\u1edbi h\u01a1n.<\/p>\n<p><strong>PEEK ch\u1ee9a s\u1ee3i carbon<\/strong> \u0111ang thu h\u00fat s\u1ef1 ch\u00fa \u00fd trong c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 y t\u1ebf, n\u01a1i k\u1ebft h\u1ee3p kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a PEEK v\u1edbi \u0111\u1ed9 c\u1ee9ng c\u1ee7a CF lo\u1ea1i b\u1ecf s\u1ef1 bi\u1ebfn d\u1ea1ng k\u00edch th\u01b0\u1edbc x\u1ea3y ra \u1edf c\u00e1c spacer kh\u00f4ng gia c\u1ed1 \u1edf nhi\u1ec7t \u0111\u1ed9 cao. \u0110\u1ed9 ch\u1ecbu n\u00e9n v\u01b0\u1ee3t qu\u00e1 200 MPa \u2014 g\u1ea7n b\u1eb1ng th\u00e9p nh\u1eb9 \u2014 v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng ch\u1ec9 b\u1eb1ng m\u1ed9t ph\u1ea7n nh\u1ecf.<\/p>\n<p><strong>Polymer d\u1eabn nhi\u1ec7t<\/strong> l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n. C\u00e1c spacer nh\u1ef1a truy\u1ec1n th\u1ed1ng l\u00e0 ch\u1ea5t c\u00e1ch nhi\u1ec7t. C\u00e1c h\u1ee3p ch\u1ea5t nylon ch\u1ee9a boron nitride v\u00e0 PEEK ch\u1ee9a graphite m\u1edbi cung c\u1ea5p kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t t\u1eeb 1\u201310 W\/m\u00b7K \u2014 v\u1eabn th\u1ea5p h\u01a1n kim lo\u1ea1i, nh\u01b0ng \u0111\u1ee7 \u0111\u1ec3 qu\u1ea3n l\u00fd nhi\u1ec7t trong c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED v\u00e0 \u0111i\u1ec7n t\u1eed c\u00f4ng su\u1ea5t, n\u01a1i m\u1ed9t spacer ho\u00e0n to\u00e0n c\u00e1ch nhi\u1ec7t s\u1ebd t\u1ea1o ra \u0111i\u1ec3m ngh\u1ebdn nhi\u1ec7t.<\/p>\n<p><strong>Polyamide sinh h\u1ecdc<\/strong> (PA11 t\u1eeb d\u1ea7u th\u1ea7u d\u1ea7u, PA410 t\u1eeb ngu\u1ed3n t\u00e1i t\u1ea1o) \u0111ang xu\u1ea5t hi\u1ec7n trong ng\u00e0nh \u00f4 t\u00f4 v\u00e0 \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng, n\u01a1i y\u00eau c\u1ea7u v\u1ec1 b\u1ec1n v\u1eefng ng\u00e0y c\u00e0ng nghi\u00eam ng\u1eb7t. Theo <a href=\"https:\/\/www.oecd.org\/environment\/\" target=\"_blank\" rel=\"noopener\">H\u01b0\u1edbng d\u1eabn ph\u00e2n t\u00edch v\u00f2ng \u0111\u1eddi v\u1eadt li\u1ec7u c\u1ee7a OECD<\/a>, PA11 sinh h\u1ecdc gi\u1ea3m l\u01b0\u1ee3ng carbon t\u00edch h\u1ee3p t\u1eeb 50\u201370% so v\u1edbi PA6 ngu\u1ed3n d\u1ea7u m\u1ecf trong khi v\u1eabn duy tr\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u2014 m\u1ed9t s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i th\u1ef1c s\u1ef1 h\u1ea5p d\u1eabn khi c\u00e1c y\u00eau c\u1ea7u v\u1ec1 b\u1ec1n v\u1eefng chu\u1ed7i cung \u1ee9ng ng\u00e0y c\u00e0ng ch\u1eb7t ch\u1ebd.<\/p>\n<h3>S\u1ea3n xu\u1ea5t ph\u1ee5 gia v\u00e0 spacer t\u00f9y ch\u1ec9nh<\/h3>\n<p>In 3D in \u1ea5n \u0111ang bi\u1ebfn \u0111\u1ed5i c\u00e1ch c\u00e1c k\u1ef9 s\u01b0 t\u00ecm ngu\u1ed3n c\u00e1c b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a t\u00f9y ch\u1ec9nh. \u0110\u1ed1i v\u1edbi s\u1ed1 l\u01b0\u1ee3ng d\u01b0\u1edbi 500 chi\u1ebfc, c\u00e1c b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t t\u00f9y ch\u1ec9nh \u0111\u00fac nh\u1ef1a y\u00eau c\u1ea7u \u0111\u1ea7u t\u01b0 d\u1ee5ng c\u1ee5 t\u1eeb $3.000\u2013$25.000 v\u00e0 th\u1eddi gian s\u1ea3n xu\u1ea5t t\u1eeb 4\u20138 tu\u1ea7n. In FDM b\u1eb1ng PA12 (nylon) ho\u1eb7c SLS b\u1eb1ng nylon c\u00f3 ch\u1ee9a s\u1ee3i th\u1ee7y tinh cung c\u1ea5p h\u00ecnh d\u1ea1ng b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t t\u00f9y ch\u1ec9nh trong v\u00f2ng 24\u201372 gi\u1edd m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ea7u t\u01b0 d\u1ee5ng c\u1ee5.<\/p>\n<p>H\u1ea1n ch\u1ebf: b\u1ec1 m\u1eb7t b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t in c\u00f3 \u0111\u1ed9 nh\u00e1m (Ra 10\u201350 \u00b5m cho FDM) m\u00e0 c\u00e1c b\u1ec1 m\u1eb7t gia c\u00f4ng ho\u1eb7c \u0111\u00fac kh\u00f4ng c\u00f3, v\u00e0 li\u00ean k\u1ebft l\u1edbp kh\u00f4ng \u0111\u1ec1u h\u01b0\u1edbng t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 b\u1ec1n theo h\u01b0\u1edbng. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu l\u1ef1c n\u00e9n thu\u1ea7n t\u00fay, nh\u1eefng h\u1ea1n ch\u1ebf n\u00e0y hi\u1ebfm khi quan tr\u1ecdng. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c ho\u1eb7c ch\u1ecbu m\u1ecfi cao, ch\u00fang l\u1ea1i quan tr\u1ecdng.<\/p>\n<p>N\u01a1i AM v\u01b0\u1ee3t tr\u1ed9i: t\u1ea1o m\u1eabu th\u1eed c\u00e1c b\u1ed9 l\u1eafp r\u00e1p m\u1ed9t l\u1ea7n, c\u00e1c b\u1ed9 ph\u1eadn thay th\u1ebf cho thi\u1ebft b\u1ecb c\u0169 kh\u00f4ng c\u00f3 b\u1ea3n v\u1ebd, v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t ph\u1ee9c t\u1ea1p v\u1ec1 h\u00ecnh d\u1ea1ng (b\u01b0\u1edbc, c\u00f3 v\u00e0nh, g\u00f3c) m\u00e0 c\u00e1c b\u1ed9 ph\u1eadn trong catalog ti\u00eau chu\u1ea9n kh\u00f4ng c\u00f3.<\/p>\n<p>D\u1ef1a tr\u00ean <a href=\"https:\/\/wohlersassociates.com\/\" target=\"_blank\" rel=\"noopener\">d\u1eef li\u1ec7u th\u1ecb tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t c\u1ed9ng th\u00eam c\u1ee7a Wohlers Associates<\/a>, th\u1ecb tr\u01b0\u1eddng nh\u1ef1a c\u00f4ng nghi\u1ec7p AM d\u1ef1 ki\u1ebfn s\u1ebd v\u01b0\u1ee3t qu\u00e1 12 t\u1ef7 USD v\u00e0o n\u0103m 2028, v\u1edbi c\u00e1c thay th\u1ebf d\u1ee5ng c\u1ee5 v\u00e0 \u1ed1c v\u00edt (bao g\u1ed3m c\u00e1c b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t t\u00f9y ch\u1ec9nh) l\u00e0 m\u1ed9t ph\u00e2n kh\u00fac ph\u00e1t tri\u1ec3n nhanh.<\/p>\n<hr \/>\n<h2>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p><strong>H\u1ecfi: B\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a ch\u00ednh x\u00e1c l\u00e0 g\u00ec?<\/strong><br \/>\nM\u1ed9t b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n h\u00ecnh tr\u1ee5 ho\u1eb7c \u1ed1ng \u0111\u1eb7t gi\u1eefa hai b\u1ec1 m\u1eb7t tr\u00ean m\u1ed9t b\u1ed9 b\u1eaft v\u00edt \u0111\u1ec3 duy tr\u00ec m\u1ed9t kho\u1ea3ng c\u00e1ch nh\u1ea5t \u0111\u1ecbnh, c\u00e1ch \u0111i\u1ec7n c\u00e1c b\u1ec1 m\u1eb7t, ph\u00e2n ph\u1ed1i l\u1ef1c si\u1ebft ho\u1eb7c gi\u1ea3m ch\u1ea5n rung. Ch\u00fang \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00e1c lo\u1ea1i nh\u1ef1a k\u1ef9 thu\u1eadt nh\u01b0 nylon, acetal, HDPE v\u00e0 PEEK t\u00f9y thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng \u1ee9ng d\u1ee5ng.<\/p>\n<p><strong>H\u1ecfi: Hai lo\u1ea1i b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a ch\u00ednh l\u00e0 g\u00ec?<\/strong><br \/>\nHai lo\u1ea1i c\u01a1 b\u1ea3n l\u00e0 b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t kh\u00f4ng c\u00f3 ren (l\u1ed7 tr\u01a1n) \u2014 tr\u01b0\u1ee3t qua m\u1ed9t bu l\u00f4ng v\u00e0 \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t \u2014 v\u00e0 c\u00e1c ch\u00e2n \u0111\u1ebf c\u00f3 ren, c\u00f3 ren trong ho\u1eb7c ngo\u00e0i v\u00e0 c\u00f3 th\u1ec3 v\u1eb7n ch\u1eb7t \u0111\u1ed9c l\u1eadp. B\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t kh\u00f4ng c\u00f3 ren \u0111\u01a1n gi\u1ea3n h\u01a1n v\u00e0 r\u1ebb h\u01a1n; c\u00e1c ch\u00e2n \u0111\u1ebf c\u00f3 ren l\u00e0 c\u1ea5u tr\u00fac v\u00e0 c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng.<\/p>\n<p><strong>H\u1ecfi: T\u00f4i n\u00ean ch\u1ecdn b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nylon hay acetal \u2014 lo\u1ea1i n\u00e0o ph\u00f9 h\u1ee3p?<\/strong><br \/>\nCh\u1ecdn nylon khi \u01b0u ti\u00ean v\u1ec1 chi ph\u00ed v\u00e0 \u0111\u1ed9 \u1ea9m \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t. Ch\u1ecdn acetal khi quan tr\u1ecdng nh\u1ea5t l\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc: acetal h\u1ea5p th\u1ee5 \u00edt h\u01a1n 0.25% \u0111\u1ed9 \u1ea9m so v\u1edbi 2\u20134% c\u1ee7a nylon, ph\u00f9 h\u1ee3p cho m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 chu k\u1ef3 \u1ea9m \u01b0\u1edbt n\u01a1i nylon s\u1ebd ph\u1ed3ng l\u00ean v\u00e0 l\u00e0m thay \u0111\u1ed5i kho\u1ea3ng c\u00e1ch.<\/p>\n<p><strong>H\u1ecfi: T\u00f4i c\u1ea7n k\u00edch th\u01b0\u1edbc b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a nh\u01b0 th\u1ebf n\u00e0o?<\/strong><br \/>\nX\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 khoan theo y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n <a href=\"https:\/\/productionscrews.com\/vi\/sex-bolts\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1149\">k\u00edch th\u01b0\u1edbc \u1ed1c v\u00edt<\/a> (ID ph\u1ea3i l\u00e0m s\u1ea1ch bu l\u00f4ng v\u1edbi khe h\u1edf 0,1\u20130,3 mm), OD theo m\u1eb7t ph\u1eb3ng c\u1ee7a washer ho\u1eb7c di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u00e2n ph\u1ed1i t\u1ea3i tr\u1ecdng, v\u00e0 chi\u1ec1u d\u00e0i theo khe h\u1edf thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n. Ti\u00eau chu\u1ea9n <a href=\"https:\/\/productionscrews.com\/vi\/nylon-spacers\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1146\">C\u00e1c mi\u1ebfng \u0111\u1ec7m nylon c\u00f3 k\u00edch th\u01b0\u1edbc theo ti\u00eau chu\u1ea9n M2\u2013M10<\/a> v\u00e0 c\u00e1c k\u00edch th\u01b0\u1edbc t\u1eeb 4\u201340 \u0111\u1ebfn 1\/4-20 UNC inch.<\/p>\n<p><strong>H\u1ecfi: B\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a c\u00f3 c\u00e1ch \u0111i\u1ec7n \u0111i\u1ec7n kh\u00f4ng?<\/strong><br \/>\nC\u00f3 \u2014 c\u00e1c b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t b\u1eb1ng nh\u1ef1a k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n (nylon, acetal, HDPE, PTFE) l\u00e0 ch\u1ea5t c\u00e1ch \u0111i\u1ec7n \u0111i\u1ec7n tuy\u1ec7t v\u1eddi, v\u1edbi \u0111i\u1ec7n tr\u1edf su\u1ea5t th\u1ec3 t\u00edch v\u01b0\u1ee3t qu\u00e1 10\u00b9\u00b2 \u03a9\u00b7cm. \u0110i\u1ec1u n\u00e0y khi\u1ebfn b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh khi c\u00e1ch ly m\u1ed9t bo m\u1ea1ch in kh\u1ecfi khung kim lo\u1ea1i d\u1eabn \u0111i\u1ec7n ho\u1eb7c t\u00e1ch hai d\u00e2y d\u1eabn trong m\u1ed9t b\u1ed9 l\u1eafp r\u00e1p \u0111i\u1ec7n \u00e1p cao.<\/p>\n<p><strong>H\u1ecfi: B\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a c\u00f3 th\u1ec3 d\u00f9ng ngo\u00e0i tr\u1eddi kh\u00f4ng?<\/strong><br \/>\nNylon v\u00e0 acetal ti\u00eau chu\u1ea9n b\u1ecb ph\u00e2n h\u1ee7y d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a tia UV trong v\u00f2ng 12\u201324 th\u00e1ng. \u0110\u1ec3 s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi, c\u1ea7n ch\u1ec9 \u0111\u1ecbnh c\u00e1c lo\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi tia UV (th\u01b0\u1eddng m\u00e0u \u0111en v\u1edbi ch\u1ea5t h\u1ea5p th\u1ee5 tia UV carbon-black). Polypropylene c\u00f3 ch\u1ea5t \u1ed5n \u0111\u1ecbnh tia UV c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng x\u00e2y d\u1ef1ng ngo\u00e0i tr\u1eddi nh\u01b0 gh\u1ebf \u0111\u1ee1 th\u00e9p v\u00e0 b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t m\u1eb7t ti\u1ec1n.<\/p>\n<p><strong>H\u1ecfi: Nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a c\u1ee7a b\u1ed9 ph\u1eadn c\u00e1ch nhi\u1ec7t nh\u1ef1a l\u00e0 bao nhi\u00eau?<\/strong><br \/>\nPh\u1ee5 thu\u1ed9c v\u00e0o v\u1eadt li\u1ec7u: nylon ti\u00eau chu\u1ea9n (PA66) \u0111\u1ebfn 120\u00b0C li\u00ean t\u1ee5c; acetal \u0111\u1ebfn 90\u00b0C; polypropylene \u0111\u1ebfn 100\u00b0C; PEEK \u0111\u1ebfn 250\u00b0C; PTFE \u0111\u1ebfn 260\u00b0C. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng tr\u00ean 130\u00b0C, chuy\u1ec3n sang PEEK ho\u1eb7c PPS ch\u1ee9a s\u1ee3i th\u1ee7y tinh. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng d\u01b0\u1edbi -40\u00b0C, PTFE v\u00e0 UHMWPE v\u1eabn b\u1ec1n ch\u1eafc trong khi nylon tr\u1edf n\u00ean gi\u00f2n.<\/p>\n<hr \/>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>C\u00e1c spacers nh\u1ef1a l\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n nh\u1ecf nh\u01b0ng mang l\u1ea1i h\u1eadu qu\u1ea3 l\u1edbn. L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p \u2014 nylon cho c\u00e1ch \u0111i\u1ec7n chung, acetal cho \u0111\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc, HDPE\/PP cho kh\u1ea3 n\u0103ng ch\u1ed1ng h\u00f3a ch\u1ea5t, PEEK cho m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t \u2014 s\u1ebd quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp xem m\u1ed9t b\u1ed9 l\u1eafp r\u00e1p c\u00f3 gi\u1eef \u0111\u01b0\u1ee3c dung sai trong su\u1ed1t v\u00f2ng \u0111\u1eddi hay b\u1ecb h\u1ecfng s\u1edbm.<\/p>\n<p>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, n\u1ed9i th\u1ea5t \u00f4 t\u00f4 v\u00e0 \u0111\u00e8n chi\u1ebfu s\u00e1ng <a href=\"https:\/\/productionscrews.com\/vi\/nut-vs-bolt\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"1150\">\u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p<\/a>V\u1eadt li\u1ec7u nh\u1ef1a nylon ch\u1ee9a s\u1ee3i th\u1ee7y tinh (PA66-GF30) l\u00e0m \u0111\u1ebf l\u1ee5c gi\u00e1c ph\u00f9 h\u1ee3p v\u1edbi ph\u1ea7n l\u1edbn nhu c\u1ea7u: ch\u1eafc ch\u1eafn, c\u00e1ch \u0111i\u1ec7n, \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc \u0111\u1ee7, v\u00e0 d\u1ec5 d\u00e0ng c\u00f3 s\u1eb5n v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n theo h\u1ec7 m\u00e9t v\u00e0 imperial. N\u00e2ng c\u1ea5p l\u00ean acetal khi c\u00f3 chu k\u1ef3 \u0111\u1ed9 \u1ea9m, s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i \u1ed5n \u0111\u1ecbnh tia UV cho c\u00e1c m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi, v\u00e0 \u0111\u1ebfn PEEK ho\u1eb7c PPS khi y\u00eau c\u1ea7u v\u1ec1 nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c h\u00f3a ch\u1ea5t kh\u1eafc nghi\u1ec7t. \u0110\u1ec3 l\u1ea5y ngu\u1ed3n s\u1ea3n xu\u1ea5t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn v\u1edbi dung sai k\u00edch th\u01b0\u1edbc nh\u1ea5t qu\u00e1n, <a href=\"\/vi\/plastic-spacers\/\" target=\"_blank\">duy\u1ec7t qua to\u00e0n b\u1ed9 ph\u1ea1m vi c\u00e1c spacers v\u00e0 \u0111\u1ebf nh\u1ef1a c\u1ee7a ch\u00fang t\u00f4i<\/a> t\u1ea1i productionscrews.com \u2014 c\u00f3 s\u1eb5n trong c\u00e1c k\u00edch th\u01b0\u1edbc M2 \u0111\u1ebfn M12 theo h\u1ec7 m\u00e9t v\u00e0 inch ti\u00eau chu\u1ea9n, v\u1edbi giao h\u00e0ng trong c\u00f9ng tu\u1ea7n cho c\u00e1c lo\u1ea1i nylon v\u00e0 acetal ti\u00eau chu\u1ea9n.<\/p>\n<p>L\u1ea7n t\u1edbi khi b\u1ed9 l\u1eafp r\u00e1p c\u1ee7a b\u1ea1n ph\u00e1t ra ti\u1ebfng l\u1ee5c c\u1ee5c, b\u1ecb \u0103n m\u00f2n t\u1ea1i c\u00e1c m\u1ed1i n\u1ed1i kim lo\u1ea1i, ho\u1eb7c l\u1ec7ch kh\u1ecfi dung sai sau m\u1ed9t chu k\u1ef3 nhi\u1ec7t \u0111\u1ed9, h\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c ki\u1ec3m tra c\u00e1c spacers. Gi\u1ea3i ph\u00e1p th\u01b0\u1eddng \u0111\u01a1n gi\u1ea3n \u2014 v\u00e0 r\u1ebb h\u01a1n \u2014 so v\u1edbi v\u1ebb ngo\u00e0i c\u1ee7a n\u00f3.<\/p>","protected":false},"excerpt":{"rendered":"<p>M\u1ecdi \u0111i\u1ec1u k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi mua c\u1ea7n bi\u1ebft v\u1ec1 v\u1eadt t\u01b0 c\u00e1ch nhi\u1ec7t nh\u1ef1a: c\u00e1c lo\u1ea1i, v\u1eadt li\u1ec7u (nylon, acetal, PEEK, PTFE), ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>","protected":false},"author":1,"featured_media":4349,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4346","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-screws-flange-tutorial"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/4346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=4346"}],"version-history":[{"count":4,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/4346\/revisions"}],"predecessor-version":[{"id":4352,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/4346\/revisions\/4352"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/4349"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=4346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=4346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=4346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}