{"id":8792,"date":"2026-10-19T15:57:17","date_gmt":"2026-10-19T13:57:17","guid":{"rendered":"https:\/\/www.wako-odlewnia.pl\/?p=8792"},"modified":"2026-10-27T16:01:10","modified_gmt":"2026-10-27T15:01:10","slug":"jak-chlazeni-a-odvzdusneni-kokil-omezuje-poreznost-v-hlinikovych-odlitcich","status":"publish","type":"post","link":"https:\/\/www.wako-odlewnia.pl\/cs\/jak-chlodzenie-i-odpowietrzanie-kokili-ograniczaja-porowatosc-w-odlewach-aluminiowych\/","title":{"rendered":"Jak chlazen\u00ed a ods\u00e1v\u00e1n\u00ed kokil omezuje por\u00e9znost v hlin\u00edkov\u00fdch odlitc\u00edch"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Formov\u00e1n\u00ed kokilov\u00fdch forem z hlin\u00edkov\u00fdch slitin vy\u017eaduje p\u0159esnou kontrolu chlazen\u00ed a odvzdu\u0161n\u011bn\u00ed formy. Pouze vyv\u00e1\u017een\u00ed t\u011bchto dvou parametr\u016f umo\u017e\u0148uje trvale omezit por\u00e9znost a zajistit opakovatelnost kvality d\u00edl\u016f. Rychl\u00e9 odv\u00e1d\u011bn\u00ed tepla kovovou matric\u00ed vede k drobnozrnit\u00e9 struktu\u0159e, kter\u00e1 v\u00fdrazn\u011b zlep\u0161uje mechanick\u00e9 vlastnosti a sni\u017euje riziko vnit\u0159n\u00edch vad v hotov\u00e9m pr\u016fmyslov\u00e9m v\u00fdrobku.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak ochlazen\u00ed kokil ovliv\u0148uje por\u00e9znost?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Spr\u00e1vn\u011b napl\u00e1novan\u00e9 <a href=\"https:\/\/www.wako-odlewnia.pl\/cs\/kokilove-liti\/\">kokilov\u00e9 lit\u00ed<\/a> vym\u00e1h\u00e1 rychlou termickou v\u00fdm\u011bnu<\/strong>, To se p\u0159\u00edmo odrazuje na tempu tuhnut\u00ed slitiny. Rychlej\u0161\u00ed odpa\u0159ov\u00e1n\u00ed tepla vede k vzniku drobn\u011bj\u0161\u00edch zrn, co\u017e v kone\u010dn\u00e9m d\u016fsledku zvy\u0161uje pevnost a odolnost prvku v\u016f\u010di korozi. V na\u0161\u00ed hutnick\u00e9 praxi v Wako Odlewni pravideln\u011b pozorujeme, \u017ee p\u0159\u00edli\u0161 pomal\u00e9 chlazen\u00ed prosp\u00edv\u00e1 r\u016fstu zrn a ne\u017e\u00e1douc\u00edmu odd\u011blen\u00ed slo\u017eek. Hlin\u00edkov\u00fd slitina se p\u0159i p\u0159echodu z tekut\u00e9ho stavu do pevn\u00e9ho stavu zmen\u0161uje objemov\u011b p\u0159ibli\u017en\u011b o 4\u20136,5%. Rigidn\u00ed kontrola tohoto kroku \u00fa\u010dinn\u011b minimalizuje vznik pr\u00e1zdn\u00fdch prostor uvnit\u0159 struktury kovu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d voln\u00e9 chlazen\u00ed oslabuje materi\u00e1l?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Voln\u00e9 odv\u00e1d\u011bn\u00ed tepla drasticky prodlu\u017euje dobu vytvrzen\u00ed v hrub\u00fdch pr\u016f\u0159ez\u00edch odlitk\u016f. Na t\u011bchto m\u00edstech, nej\u010dast\u011bji u spojen\u00ed st\u011bn ve tvaru p\u00edsmen T nebo L, vznikaj\u00ed rozs\u00e1hl\u00e9 tepeln\u00e9 uzly. Tepl\u00fd kov tam nedok\u00e1\u017ee dostate\u010dn\u011b nahradit ztr\u00e1tu objemu, <strong>p\u0159i tvorb\u011b n\u00e1sledn\u011b vznik\u00e1 por\u00e9znost skurczov\u00fdch nebo mezendendrick\u00fdch jam<\/strong>. Nap\u0159\u00edklad v detailech o tlou\u0161\u0165ce v\u011bt\u0161\u00ed ne\u017e 15 mm rozd\u00edl teplot mezi vn\u011bj\u0161\u00ed stranou a j\u00e1drem snadno p\u0159esahuje 100\u00b0C. To vede k okam\u017eit\u00e9mu sn\u00ed\u017een\u00ed pevnosti a mechanick\u00e9 pevnosti. V d\u00edlech pracuj\u00edc\u00edch pod dynamick\u00fdm zat\u00ed\u017een\u00edm p\u0159\u00edtomnost por o pr\u016fm\u011bru v\u011bt\u0161\u00ed ne\u017e 0,5 mm \u010dasto diskvalifikuje celou vyrobenou partii.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kde um\u00edstit chladic\u00ed kan\u00e1ly ve form\u011b?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chladic\u00ed kan\u00e1ly jsou strategicky rozm\u00edst\u011bny tak, aby bylo mo\u017en\u00e9 dos\u00e1hnout po\u017eadovan\u00e9ho \u00fa\u010dinku. <strong>sm\u011brovan\u00e9 ztuhnut\u00ed od nejten\u010d\u00ed \u010d\u00e1sti sm\u011brem k nap\u00e1jaj\u00edc\u00edm \u017eil\u00e1m<\/strong>. Standardn\u00ed pr\u016fm\u011bry kan\u00e1l\u016f se pohybuj\u00ed od 6 do 20 mm, p\u0159i\u010dem\u017e jejich optim\u00e1ln\u00ed vzd\u00e1lenost od tv\u00e1\u0159\u00edc\u00edho povrchu se pohybuje v rozmez\u00ed 7\u201340 mm. Konkr\u00e9tn\u00ed parametry p\u0159\u00edmo z\u00e1vis\u00ed na rozm\u011brech vypl\u0148ovan\u00e9ho d\u00edlu. Takov\u00fd syst\u00e9m stabilizuje rozlo\u017een\u00ed teploty a v\u00fdrazn\u011b zkracuje celkovou dobu v\u00fdrobn\u00edho cyklu. Oblast\u011b zvl\u00e1\u0161t\u011b masivn\u00edch d\u00edl\u016f je nav\u00edc poskytov\u00e1na ochrana prost\u0159ednictv\u00edm p\u0159\u00edm\u00e9ho vodn\u00edho nebo stla\u010den\u00e9ho vzdu\u0161n\u00e9ho chlazen\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co eliminuje z\u00e1n\u011bty a kontraktury dutiny b\u0159i\u0161n\u00ed?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Odv\u011btr\u00e1v\u00e1n\u00ed ve form\u011b velmi \u00fazk\u00fdch otvor\u016f na povrchu rozd\u011blen\u00ed matrice (obvykle s hloubkou pouh\u00fdch 0,2\u20130,5 mm) umo\u017e\u0148uje \u00faniku plyn\u016f vytla\u010dovan\u00fdch proudem slitiny. <strong>Z\u00e1suvn\u00fd syst\u00e9m s p\u0159ep\u00e1\u017ekami kompenzuje p\u0159irozen\u00fd objemov\u00fd kontrakci<\/strong>, P\u0159i pr\u00e1ci jako bezpe\u010dn\u00e1 n\u00e1dr\u017e tekut\u00e9ho hlin\u00edku v kone\u010dn\u00e9m st\u00e1diu taven\u00ed. Naopak, vtokov\u00fd syst\u00e9m pln\u00ed \u00fapln\u011b jinou \u00falohu \u2013 jeho pr\u016f\u0159ez a distribu\u010dn\u00ed kan\u00e1ly zaji\u0161\u0165uj\u00ed klidn\u00e9, bezvibruj\u00edc\u00ed napln\u011bn\u00ed dutiny kokilky. P\u0159\u00edsn\u00e9 odd\u011blen\u00ed funkc\u00ed nap\u00e1jen\u00ed a p\u0159iv\u00e1d\u011bn\u00ed kovu vylu\u010duje turbulence. Pro velkokapacitn\u00ed d\u00edly o hmotnosti vy\u0161\u0161\u00ed ne\u017e 2 kg pou\u017eit\u00ed p\u0159esn\u011b vypo\u010dten\u00e9ho vtoku sni\u017euje plynov\u00e9 vadnosti a\u017e o 60%.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak se opravuje syst\u00e9m pro odv\u00e1d\u011bn\u00ed vzduchu z formy?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Po vytvo\u0159en\u00ed zku\u0161ebn\u00ed \u010d\u00e1sti detektivov\u00e9 podrobn\u011b analyzuj\u00ed um\u00edst\u011bn\u00ed vad uvnit\u0159 struktury materi\u00e1lu. <strong>Nej\u010dast\u011bji se opravuje samotn\u00fd ventila\u010dn\u00ed syst\u00e9m.<\/strong> P\u0159id\u00e1n\u00edm nov\u00fdch \u00fakos\u016f, mechanick\u00fdm prohlouben\u00edm st\u00e1vaj\u00edc\u00edch \u0161t\u011brbinov\u00fdch otvor\u016f nebo chytr\u00fdm p\u0159em\u00edst\u011bn\u00edm p\u0159epou\u0161t\u011bc\u00edch syst\u00e9m\u016f lze takov\u00e9 n\u00e1strojov\u00e9 z\u00e1sahy rychle stabilizovat proces ztuhnut\u00ed bez nutnosti n\u00e1kladn\u00e9ho p\u0159epracov\u00e1n\u00ed cel\u00e9 ocelov\u00e9 matrice. \u00daprava na jednotliv\u00fdch bodech umo\u017e\u0148uje zachovat p\u016fvodn\u00ed n\u00e1stroje a plynule vstoupit do hlavn\u00ed f\u00e1ze s\u00e9riov\u00e9 v\u00fdroby objedn\u00e1vky.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kdy je nutn\u00e1 zm\u011bna geometrie tvaru?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Modifikace vnit\u0159n\u00ed geometrie se st\u00e1v\u00e1 jedin\u00fdm v\u00fdchodiskem v p\u0159\u00edpad\u011b mimo\u0159\u00e1dn\u011b tenk\u00fdch st\u011bn (m\u00e9n\u011b ne\u017e 3\u20134 mm) nebo konstruk\u010dn\u00edch profil\u016f. <strong>Odm\u00edtaj\u00ed spr\u00e1vn\u00e9 pln\u011bn\u00ed i p\u0159es perfektn\u00ed chlazen\u00ed<\/strong>. Hlavn\u00edm vin\u00edkem jsou \u010dasto p\u0159\u00edli\u0161 ostr\u00e9 p\u0159echody ploch nebo p\u0159\u00edsn\u00e9 \u00fahly sklonu. Technologov\u00e9 pak opravuj\u00ed v\u00fdstupky, z\u00fa\u017e\u00ed kritick\u00e9 \u010d\u00e1sti nebo m\u011bn\u00ed pracovn\u00ed \u00fahel sklonu cel\u00e9ho d\u00edlu ve form\u011b. Rozhodnut\u00ed o tak z\u00e1sadn\u00edch zm\u011bn\u00e1ch se v\u017edy op\u00edraj\u00ed o digit\u00e1ln\u00ed anal\u00fdzu v\u00fdsledk\u016f z pokro\u010dil\u00fdch program\u016f pro simulaci pr\u016ftoku tekutiny. To eliminuje vznik vad v podob\u011b studen\u00fdch odtok\u016f a nap\u00ednac\u00edch prasklin.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co si zapamatovat ohledn\u011b kontroly procesu?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Udr\u017eiteln\u00e9 \u0159\u00edzen\u00ed termick\u00e9ho cyklu a odv\u00e1d\u011bn\u00ed plyn\u016f bezpodm\u00edne\u010dn\u011b zaru\u010duje rovnom\u011brnou strukturu slitiny a plnou tlakovou t\u011bsnost.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kontrolovan\u00e9 chlazen\u00ed omezuje ni\u010div\u00e9 kontrakce dutin.<\/li>\n\n\n\n<li>Syst\u00e9matick\u00e9 odvzdu\u0161\u0148ov\u00e1n\u00ed eliminuje plynov\u00e9 bubliny.<\/li>\n\n\n\n<li>Odd\u011blen\u00ed regula\u010dn\u00edho syst\u00e9mu od ventil\u016f stabilizuje tok vody.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Jako zku\u0161en\u00fd dodavatel pro automobilov\u00fd a obrann\u00fd pr\u016fmysl v Wako Odlewni pova\u017eujeme tyto z\u00e1sady za z\u00e1klad opakovatelnosti. Pokud pl\u00e1nujete implementaci komponent s vysok\u00fdmi mechanick\u00fdmi po\u017eadavky, je dobr\u00fdm krokem konzultovat tvar profilu s technologi\u00ed je\u0161t\u011b p\u0159ed etapou fr\u00e9zov\u00e1n\u00ed v\u00fdrobn\u00ed matrice.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kontrola chlazen\u00ed a odv\u011btr\u00e1v\u00e1n\u00ed p\u0159i lit\u00ed kol\u00edk\u016f rozhoduje o drobnozrnit\u00e9 struktu\u0159e, men\u0161\u00ed por\u00e9znosti a stabiln\u00edm rozm\u011br\u016fm. P\u0159\u00edli\u0161 pomal\u00fd odvod tepla p\u0159isp\u00edv\u00e1 k vzniku trhlin, p\u0159i\u010dem\u017e navrhnut\u00e9 chladic\u00ed kan\u00e1ly, v\u00fdlevky a odv\u011btr\u00e1v\u00e1n\u00ed omezuj\u00ed plynov\u00e9 nedostatky. V s\u00e9riov\u00e9 v\u00fdrob\u011b korekce syst\u00e9mu odv\u011btr\u00e1v\u00e1n\u00ed pom\u00e1haj\u00ed stabilizovat proces bez nutnosti p\u0159estavby cel\u00e9 formy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Pro\u010d chlazen\u00ed p\u0159i kokilkov\u00e9m lit\u00ed tak v\u00fdrazn\u011b ovliv\u0148uje por\u00e9znost?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Rychl\u00e9 chlazen\u00ed vy\u017eaduje krat\u0161\u00ed \u010das tuhnut\u00ed a men\u0161\u00ed strukturu zrna, co\u017e omezuje vznik vnit\u0159n\u00edch dutin. Pokud je teplo odv\u00e1d\u011bno p\u0159\u00edli\u0161 pomalu, v odlitku se snadn\u011bji vytv\u00e1\u0159ej\u00ed kontrak\u010dn\u00ed dutiny a por\u00e9zn\u00ed mezizubn\u00ed struktura.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Jakou roli hraj\u00ed chladic\u00ed kan\u00e1ly v kokil\u011b?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Chladic\u00ed kan\u00e1ly \u0159\u00edd\u00ed p\u0159enos tepla tak, aby vytvrzov\u00e1n\u00ed prob\u00edhalo sm\u011brem od ten\u010d\u00edch k tlust\u0161\u00edm z\u00f3n\u00e1m odlitku. D\u00edky tomu lze snadn\u011bji udr\u017eet stabiln\u00ed rozm\u011bry a omezit vadnosti v m\u00edstech s vysokou hustotou materi\u00e1lu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pro\u010d se pou\u017e\u00edvaj\u00ed ventily protipl\u00e1n\u00ed, p\u0159etlakov\u00e9 ventily a nap\u00e1jec\u00ed body?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Odv\u011btr\u00e1v\u00e1n\u00ed odv\u00e1d\u00ed plyny z dutiny formy a p\u0159etlak kompenzuje kontrakci objemov\u00e9 kovov\u00e9 hmoty v kone\u010dn\u00e9 f\u00e1zi tuhnut\u00ed. Takov\u00e9 \u0159e\u0161en\u00ed sni\u017euje riziko v\u00fdskytu bublin, kontraktu\u00e1ln\u00edch jam a m\u00edstn\u00edch poru\u0161en\u00ed materi\u00e1lu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kdy je t\u0159eba zm\u011bnit geometrii kokil, m\u00edsto jen upravit vzduchotok?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Zm\u011bna geometrie je pot\u0159ebn\u00e1 v p\u0159\u00edpad\u011b, kdy tenk\u00e9 fragmenty nebo hrany spr\u00e1vn\u011b nevytv\u00e1\u0159ej\u00ed plochu i p\u0159es spr\u00e1vn\u00e9 chlazen\u00ed a ods\u00e1v\u00e1n\u00ed. Ve skute\u010dnosti se to obvykle t\u00fdk\u00e1 p\u0159\u00edli\u0161 ostr\u00fdch pr\u016fchod\u016f, nep\u0159\u00edzniv\u00fdch \u00fahl\u016f sklonu nebo p\u0159\u00edli\u0161 mal\u00fdch polom\u011br\u016f okrouhlosti.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Jak\u00fd efekt m\u00e1 sou\u010dasn\u00e1 regulace chlazen\u00ed a odv\u011btr\u00e1v\u00e1n\u00ed p\u0159i s\u00e9riov\u00e9 v\u00fdrob\u011b?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00e1 kontrola obou parametr\u016f zaji\u0161\u0165uje opakovateln\u011bj\u0161\u00ed kvalitu odlitk\u016f, men\u0161\u00ed po\u010det vad a lep\u0161\u00ed tlakovou t\u011bsnost detail\u016f. Proces se tak\u00e9 st\u00e1v\u00e1 stabiln\u011bj\u0161\u00edm z hlediska doby cyklu a mechanick\u00e9 pevnosti hotov\u00fdch d\u00edl\u016f.<\/p>","protected":false},"excerpt":{"rendered":"<div class=\"tmnf_excerpt\"><p>Formov\u00e1n\u00ed kokilov\u00fdch forem z hlin\u00edkov\u00fdch slitin vy\u017eaduje p\u0159esnou kontrolu chlazen\u00ed a odv\u011btr\u00e1v\u00e1n\u00ed formy. Pouze vyv\u00e1\u017een\u00ed t\u011bchto dvou parametr\u016f umo\u017e\u0148uje trvale omezit por\u00e9znost a zajistit opakovatelnou kvalitu d\u00edl\u016f. Rychl\u00e9 odv\u00e1d\u011bn\u00ed tepla kovovou matric\u00ed vede k drobnozrnit\u00e9 struktu\u0159e, kter\u00e1 v\u00fdrazn\u011b zlep\u0161uje mechanick\u00e9 vlastnosti a sni\u017euje riziko vnit\u0159n\u00edch vad v hotov\u00e9m pr\u016fmyslov\u00e9m v\u00fdrobku. Jak\u00fdm zp\u016fsobem chlazen\u00ed kokil ovliv\u0148uje \u2026<\/p>\n<\/div>","protected":false},"author":3,"featured_media":8793,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wiedza"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Odlewanie kokilowe aluminium wymaga kontroli ch\u0142odzenia i odpowietrzania, by ograniczy\u0107 porowato\u015b\u0107, jamy skurczowe i wady odlew\u00f3w.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"wako\"\/>\n\t<link rel=\"canonical\" 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