{"id":23833,"date":"2026-07-07T15:32:35","date_gmt":"2026-07-07T07:32:35","guid":{"rendered":"https:\/\/moldiecasting.com\/?p=23833"},"modified":"2026-10-09T02:24:16","modified_gmt":"2026-10-08T18:24:16","slug":"squeeze-casting-vs-die-casting-selection-based-on-critical-differences","status":"publish","type":"post","link":"https:\/\/moldiecasting.com\/cs\/blog\/squeeze-casting-vs-die-casting-selection-based-on-critical-differences\/","title":{"rendered":"Squeeze casting (lit\u00ed pod tlakem se stla\u010den\u00edm) vs. tlakov\u00e9 lit\u00ed: V\u00fdb\u011br na z\u00e1klad\u011b kl\u00ed\u010dov\u00fdch rozd\u00edl\u016f"},"content":{"rendered":"

Rozhodov\u00e1n\u00ed mezi metodou squeeze casting a vysokotlak\u00fdm lit\u00edm m\u016f\u017ee b\u00fdt pro va\u0161e v\u00fdrobn\u00ed projekty obt\u00ed\u017en\u00e9, proto\u017ee tyto dva procesy na prvn\u00ed pohled vypadaj\u00ed podobn\u011b. Kvalita v\u00fdsledn\u00e9ho d\u00edlu, n\u00e1klady a dokonce i mo\u017enost tepeln\u00e9ho zpracov\u00e1n\u00ed se v\u0161ak z\u00e1sadn\u011b li\u0161\u00ed.<\/span><\/p>\n

V t\u00e9to p\u0159\u00edru\u010dce v\u00e1m uk\u00e1\u017eeme, jak si tyto v\u00fdrobn\u00ed procesy vedou v porovn\u00e1n\u00ed z hlediska p\u00f3rovitosti, pevnosti, tepeln\u00e9ho zpracov\u00e1n\u00ed, n\u00e1klad\u016f a konstruk\u010dn\u00edch omezen\u00ed \u2013 abyste se mohli spr\u00e1vn\u011b rozhodnout pro sv\u016fj v\u00fdrobn\u00ed program.<\/span><\/p>\n

Rychl\u00fd verdikt: Kterou metodu si vybrat?<\/span><\/h2>\n

Zvolte vysokotlak\u00e9 lit\u00ed do forem (HPDC)<\/strong> pokud pot\u0159ebujete velkoobjemovou v\u00fdrobu tenkost\u011bnn\u00fdch d\u00edl\u016f (nap\u0159. kryt\u016f, konektor\u016f, chladi\u010d\u016f) s p\u0159\u00edsn\u00fdmi po\u017eadavky na vzhled a nevy\u017eadujete tepeln\u00e9 zpracov\u00e1n\u00ed T6.<\/span><\/p>\n

Zvolte lit\u00ed pod tlakem s dotlakov\u00e1n\u00edm (squeeze casting)<\/strong> pokud mus\u00ed d\u00edl odol\u00e1vat vysok\u00e9mu \u00fanavov\u00e9mu nam\u00e1h\u00e1n\u00ed, proj\u00edt zkou\u0161kami t\u011bsnosti nebo vy\u017eaduje tepeln\u00e9 zpracov\u00e1n\u00ed T6 \u2013 a jste ochotni akceptovat del\u0161\u00ed v\u00fdrobn\u00ed cyklus v\u00fdm\u011bnou za \u0161pi\u010dkov\u00e9 mechanick\u00e9 vlastnosti.<\/span><\/p>\n

St\u00e1le si nejste jisti? \u010ct\u011bte d\u00e1le a dozv\u00edte se v\u00edce.<\/span><\/p>\n

Jak funguj\u00ed oba procesy lit\u00ed<\/span><\/h2>\n

Mechanismus jednotliv\u00fdch proces\u016f ur\u010duje parametry v\u0161ech n\u00e1sledn\u00fdch f\u00e1z\u00ed, od vnit\u0159n\u00ed kvality a\u017e po dobu cyklu. P\u0159i vysokotlak\u00e9m lit\u00ed se dutina formy pln\u00ed rychle pod vst\u0159ikovac\u00edm tlakem, zat\u00edmco u lit\u00ed s dotlakov\u00e1n\u00edm (squeeze casting) p\u016fsob\u00ed na kov b\u011bhem tuhnut\u00ed st\u00e1l\u00fd tlak.<\/span><\/p>\n

\u010c\u00edm se li\u0161\u00ed vysokotlak\u00e9 lit\u00ed do forem<\/span><\/h3>\n

V procesu vysokotlak\u00e9ho lit\u00ed do forem<\/a><\/span>je roztaven\u00fd kov vst\u0159ikov\u00e1n vysokou rychlost\u00ed do ocelov\u00e9 formy p\u0159es vst\u0159ikovac\u00ed komoru. Vst\u0159ikovac\u00ed tlak se obvykle pohybuje v rozmez\u00ed 10 a\u017e 175 MPa v z\u00e1vislosti na slitin\u011b a geometrii d\u00edlu. Kov zapln\u00ed dutinu formy b\u011bhem milisekund, co\u017e zaji\u0161\u0165uje vynikaj\u00edc\u00ed rozm\u011brovou p\u0159esnost a jemn\u00e9 detaily povrchu.<\/span><\/p>\n

Nev\u00fdhodou je, \u017ee rychl\u00e9 vst\u0159ikov\u00e1n\u00ed podporuje turbulentn\u00ed proud\u011bn\u00ed. V dutin\u011b formy doch\u00e1z\u00ed k uzav\u0159en\u00ed vzduchu a plyn\u016f, kter\u00e9 po ztuhnut\u00ed kovu vytv\u00e1\u0159ej\u00ed vnit\u0159n\u00ed p\u00f3rovitost. A\u010dkoli je b\u011bhem vst\u0159ikov\u00e1n\u00ed vyv\u00edjen tlak, nen\u00ed b\u011bhem f\u00e1ze tuhnut\u00ed udr\u017eov\u00e1n stejn\u00fdm \u0159\u00edzen\u00fdm zp\u016fsobem jako u metody squeeze casting (lit\u00ed pod vysok\u00fdm tlakem s n\u00e1sledn\u00fdm dotlakov\u00e1n\u00edm).<\/span><\/p>\n

Co znamen\u00e1 metoda squeeze casting v praxi<\/span><\/h3>\n

\"sch\u00e9ma<\/p>\n

Metoda squeeze casting, n\u011bkdy ozna\u010dovan\u00e1 jako kov\u00e1n\u00ed z tekut\u00e9ho kovu, spo\u010d\u00edv\u00e1 v nalit\u00ed roztaven\u00e9ho kovu do otev\u0159en\u00e9 formy a n\u00e1sledn\u00e9m uzav\u0159en\u00ed hydraulick\u00fdm lisem, kter\u00fd b\u011bhem tuhnut\u00ed vyv\u00edj\u00ed tlak. Pr\u00e1v\u011b tato f\u00e1ze udr\u017eov\u00e1n\u00ed tlaku odli\u0161uje tento proces od b\u011b\u017en\u00e9ho tlakov\u00e9ho lit\u00ed. P\u016fsob\u00edc\u00ed tlak (\u010dasto v rozmez\u00ed 50 a\u017e 150 MPa) p\u0159itla\u010duje kov ke st\u011bn\u00e1m formy v pr\u016fb\u011bhu jeho smr\u0161\u0165ov\u00e1n\u00ed, \u010d\u00edm\u017e omezuje vznik smr\u0161\u0165ovac\u00ed p\u00f3rovitosti a zjem\u0148uje mikrostrukturu.<\/span><\/p>\n

Pomalej\u0161\u00ed a \u0159\u00edzen\u00e9 pln\u011bn\u00ed zaji\u0161\u0165uje lamin\u00e1rn\u00ed proud\u011bn\u00ed nam\u00edsto turbulentn\u00edho vst\u0159ikov\u00e1n\u00ed. Doch\u00e1z\u00ed k men\u0161\u00edmu uzav\u00edr\u00e1n\u00ed vzduchu a v\u00fdsledn\u00fd odlitek je hutn\u011bj\u0161\u00ed a vykazuje m\u00e9n\u011b vnit\u0159n\u00edch vad.<\/span><\/p>\n

P\u0159\u00edm\u00e9 srovn\u00e1n\u00ed: Squeeze casting (lit\u00ed pod tlakem s dotlakem) vs. vysokotlak\u00e9 lit\u00ed do kovov\u00fdch forem (HPDC)<\/span><\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
Srovn\u00e1van\u00fd parametr<\/span><\/th>\nVysokotlak\u00e9 lit\u00ed do kovov\u00fdch forem (HPDC)<\/span><\/th>\nSqueeze casting (lit\u00ed pod tlakem s dotlakem \/ kov\u00e1n\u00ed tekut\u00e9ho kovu)<\/span><\/th>\n<\/tr>\n<\/thead>\n
Rychlost pln\u011bn\u00ed<\/span><\/td>\nVysokorychlostn\u00ed vst\u0159ikov\u00e1n\u00ed (turbulentn\u00ed proud\u011bn\u00ed)<\/span><\/td>\nPomal\u00e9, \u0159\u00edzen\u00e9 pln\u011bn\u00ed (lamin\u00e1rn\u00ed proud\u011bn\u00ed)<\/span><\/td>\n<\/tr>\n
Doba p\u016fsoben\u00ed tlaku<\/span><\/td>\nTlak pouze b\u011bhem f\u00e1ze vst\u0159ikov\u00e1n\u00ed<\/span><\/td>\nUdr\u017eov\u00e1n\u00ed tlaku po celou dobu tuhnut\u00ed<\/span><\/td>\n<\/tr>\n
Vnit\u0159n\u00ed p\u00f3rovitost<\/span><\/td>\nVy\u0161\u0161\u00ed p\u00f3rovitost zp\u016fsoben\u00e1 plyny a smr\u0161t\u011bn\u00edm<\/span><\/td>\nT\u00e9m\u011b\u0159 nulov\u00e1 p\u00f3rovitost (hutn\u00e1 mikrostruktura)<\/span><\/td>\n<\/tr>\n
Vhodn\u00e9 pro tepeln\u00e9 zpracov\u00e1n\u00ed T6?<\/span><\/td>\nNE (riziko tvorby puch\u00fd\u0159\u016f)<\/span><\/td>\nANO (bez tvorby puch\u00fd\u0159\u016f)<\/span><\/td>\n<\/tr>\n
Typick\u00e1 tlou\u0161\u0165ka st\u011bny<\/span><\/td>\nMo\u017enost tenk\u00fdch st\u011bn (< 2 mm)<\/span><\/td>\nNutnost siln\u011bj\u0161\u00edch pr\u016f\u0159ez\u016f (> 5 mm)<\/span><\/td>\n<\/tr>\n
Nejlep\u0161\u00ed vyu\u017eit\u00ed<\/span><\/td>\nS\u00e9riov\u011b vyr\u00e1b\u011bn\u00e9 kryty, dr\u017e\u00e1ky a sk\u0159\u00edn\u011b<\/span><\/td>\nKonstruk\u010dn\u00ed, bezpe\u010dnostn\u011b kritick\u00e9 nebo hydraulick\u00e9 sou\u010d\u00e1sti<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Porozita, vlastnosti a tepeln\u00e9 zpracov\u00e1n\u00ed<\/span><\/h2>\n

Vnit\u0159n\u00ed celistvost je jedn\u00edm z nejv\u00fdznamn\u011bj\u0161\u00edch rozd\u00edl\u016f mezi t\u011bmito dv\u011bma procesy. Typ, rozlo\u017een\u00ed a m\u00edra porozity se v\u00fdrazn\u011b li\u0161\u00ed v z\u00e1vislosti na zp\u016fsobu proud\u011bn\u00ed a tuhnut\u00ed kovu.<\/span><\/p>\n

\"sch\u00e9ma<\/p>\n

Pro\u010d vznik\u00e1 porozita p\u0159i tlakov\u00e9m lit\u00ed<\/span><\/h3>\n

P\u0159i vysokotlak\u00e9m lit\u00ed vytv\u00e1\u0159\u00ed vst\u0159ikov\u00e1n\u00ed vysokou rychlost\u00ed turbulentn\u00ed proud\u011bn\u00ed uvnit\u0159 dutiny formy. Vzduch a plyny se uzav\u00edraj\u00ed do proudu kovu d\u0159\u00edve, ne\u017e mohou uniknout. B\u011bhem chladnut\u00ed kovu z\u016fst\u00e1vaj\u00ed tyto kapsy jako plynov\u00e1 porozita \u2013 drobn\u00e9 dutiny rozpt\u00fdlen\u00e9 v cel\u00e9m d\u00edlu. M\u016f\u017ee vznikat i smr\u0161\u0165ovac\u00ed porozita, a to v m\u00edstech, kde siln\u011bj\u0161\u00ed pr\u016f\u0159ezy chladnou jako posledn\u00ed bez dostate\u010dn\u00e9 kompenzace tlaku. V\u00fdsledkem je d\u00edl s m\u011b\u0159iteln\u00fdmi vnit\u0159n\u00edmi p\u00f3ry, kter\u00e9 ovliv\u0148uj\u00ed konstruk\u010dn\u00ed a tlakovou integritu, i kdy\u017e vizu\u00e1ln\u00ed kvalita povrchu m\u016f\u017ee b\u00fdt bezchybn\u00e1.<\/span><\/p>\n

Chcete-li se dozv\u011bd\u011bt v\u00edce o tom, jak tyto probl\u00e9my odhalujeme a \u0159e\u0161\u00edme, p\u0159e\u010dt\u011bte si na\u0161i specializovanou p\u0159\u00edru\u010dku o detekci a prevenci porozity<\/a><\/span> p\u0159i tlakov\u00e9m lit\u00ed.<\/span><\/p>\n

Jak metoda squeeze casting (lit\u00ed pod tlakem s dotlakem) eliminuje nedostatky<\/span><\/h3>\n

P\u0159i metod\u011b squeeze casting uzav\u00edr\u00e1 st\u00e1l\u00fd hydraulick\u00fd tlak b\u011bhem tuhnut\u00ed p\u0159\u00edpadn\u00e9 smr\u0161\u0165ovac\u00ed dutiny ji\u017e v okam\u017eiku jejich vzniku. Kov je neust\u00e1le p\u0159itla\u010dov\u00e1n k povrchu formy, co\u017e zrychluje odvod tepla a vytv\u00e1\u0159\u00ed jemn\u011bj\u0161\u00ed a stejnom\u011brn\u011bj\u0161\u00ed zrnitost struktury. Pomalej\u0161\u00ed lamin\u00e1rn\u00ed pln\u011bn\u00ed nav\u00edc od po\u010d\u00e1tku br\u00e1n\u00ed uzav\u0159en\u00ed plyn\u016f v odlitku. V\u00fdsledkem je hutn\u011bj\u0161\u00ed d\u00edl s t\u00e9m\u011b\u0159 nulovou p\u00f3rovitost\u00ed.<\/span><\/p>\n

Co to znamen\u00e1 pro v\u00e1\u0161 d\u00edl<\/span><\/h3>\n

U d\u00edl\u016f, kter\u00e9 nejsou nosn\u00e9 nebo maj\u00ed pouze estetickou funkci, je m\u00edra p\u00f3rovitosti p\u0159i b\u011b\u017en\u00e9m tlakov\u00e9m lit\u00ed \u010dasto p\u0159ijateln\u00e1. U komponent\u016f vystaven\u00fdch tlaku, konstrukc\u00ed nam\u00e1han\u00fdch \u00fanavou \u010di d\u00edl\u016f, kter\u00e9 mus\u00ed proj\u00edt rentgenovou kontrolou nebo zkou\u0161kou t\u011bsnosti, je v\u0161ak vnit\u0159n\u00ed celistvost materi\u00e1lu kl\u00ed\u010dov\u00e1.<\/span><\/p>\n

Pr\u00e1v\u011b zde tepeln\u00e9 zpracov\u00e1n\u00ed<\/strong> hraje svou roli. <\/span><\/p>\n

D\u00edly vyroben\u00e9 b\u011b\u017en\u00fdm tlakov\u00fdm lit\u00edm obvykle nelze podrobit tepeln\u00e9mu zpracov\u00e1n\u00ed typu T6 \u2013 vnit\u0159n\u00ed plyny se p\u0159i rozpou\u0161t\u011bc\u00edm \u017e\u00edh\u00e1n\u00ed rozp\u00ednaj\u00ed a zp\u016fsobuj\u00ed tvorbu puch\u00fd\u0159\u016f na povrchu.\u00a0<\/span><\/p>\n

D\u00edly vyroben\u00e9 metodou squeeze casting d\u00edky ni\u017e\u0161\u00ed p\u00f3rovitosti zpracov\u00e1n\u00ed T6 bez tvorby puch\u00fd\u0159\u016f sn\u00e1\u0161ej\u00ed a po tepeln\u00e9m zpracov\u00e1n\u00ed dosahuj\u00ed vy\u0161\u0161\u00ed pevnosti. <\/span><\/p>\n

Pokud v\u00fdkresov\u00e1 dokumentace vy\u017eaduje mechanick\u00e9 vlastnosti dosa\u017eiteln\u00e9 tepeln\u00fdm zpracov\u00e1n\u00edm, je metoda squeeze casting vhodn\u011bj\u0161\u00edm v\u00fdchoz\u00edm v\u00fdrobn\u00edm postupem.<\/span><\/p>\n

Svoboda n\u00e1vrhu, geometrie a typick\u00e9 aplikace<\/span><\/h2>\n

Oba procesy kladou odli\u0161n\u00e9 po\u017eadavky na geometrii d\u00edlu, tlou\u0161\u0165ku st\u011bn a slo\u017eitost tvar\u016f. Volba spr\u00e1vn\u00e9ho procesu z\u00e1vis\u00ed na konkr\u00e9tn\u00edch po\u017eadavc\u00edch n\u00e1vrhu.<\/span><\/p>\n

Tenk\u00e9 st\u011bny versus siln\u00e9 konstruk\u010dn\u00ed pr\u016f\u0159ezy<\/span><\/h3>\n

Tlakov\u00e9 lit\u00ed je vhodn\u00e9 pro v\u00fdrobu tenkost\u011bnn\u00fdch d\u00edl\u016f. Vysok\u00e1 rychlost vst\u0159ikov\u00e1n\u00ed a tlak vh\u00e1n\u011bj\u00ed kov do jemn\u00fdch detail\u016f a tenk\u00fdch pr\u016f\u0159ez\u016f je\u0161t\u011b p\u0159edt\u00edm, ne\u017e za\u010dne tuhnut\u00ed. P\u0159i standardn\u00edm tlakov\u00e9m lit\u00ed jsou b\u011b\u017en\u011b realizovateln\u00e9 tlou\u0161\u0165ky st\u011bn pod 2 mm. <\/span><\/p>\n

Lit\u00ed pod tlakem s dotlakov\u00e1n\u00edm (squeeze casting) je vhodn\u011bj\u0161\u00ed pro siln\u011bj\u0161\u00ed pr\u016f\u0159ezy, u nich\u017e by jinak p\u0159edstavovalo probl\u00e9m smr\u0161\u0165ov\u00e1n\u00ed materi\u00e1lu. Vypl\u0148ov\u00e1n\u00ed velmi tenk\u00fdch st\u011bn je p\u0159i pomalej\u0161\u00edm procesu s dotlakov\u00e1n\u00edm obt\u00ed\u017en\u011bj\u0161\u00ed.<\/span><\/p>\n

Slo\u017eit\u00e9 geometrie a potenci\u00e1l v\u00fdroby s v\u00fdsledn\u00fdm tvarem bl\u00edzk\u00fdm kone\u010dn\u00e9mu (near-net-shape)<\/span><\/h3>\n

Tlakov\u00e9 lit\u00ed vynik\u00e1 p\u0159i v\u00fdrob\u011b geometricky slo\u017eit\u00fdch d\u00edl\u016f s v\u00fdsledn\u00fdm tvarem bl\u00edzk\u00fdm kone\u010dn\u00e9mu, a to v\u010detn\u011b d\u00edl\u016f se z\u00e1\u0159ezy, j\u00e1dry a \u010dlenit\u00fdmi vn\u011bj\u0161\u00edmi prvky. P\u0159esnost formy a rychlost vst\u0159ikov\u00e1n\u00ed zaji\u0161\u0165uj\u00ed konzistentn\u00ed reprodukci jemn\u00fdch detail\u016f. <\/span><\/p>\n

I p\u0159i lit\u00ed pod tlakem s dotlakov\u00e1n\u00edm vznikaj\u00ed d\u00edly s tvarem bl\u00edzk\u00fdm kone\u010dn\u00e9mu, av\u0161ak mo\u017enosti vnit\u0159n\u00ed \u010dlenitosti jsou v\u00edce omezen\u00e9. <\/span><\/p>\n

Oba procesy sni\u017euj\u00ed pot\u0159ebu n\u00e1sledn\u00e9ho obr\u00e1b\u011bn\u00ed ve srovn\u00e1n\u00ed s lit\u00edm do p\u00edsku nebo do kokil, av\u0161ak tlakov\u00e9 lit\u00ed obvykle poskytuje vy\u0161\u0161\u00ed po\u010d\u00e1te\u010dn\u00ed rozm\u011brovou p\u0159esnost.<\/span><\/p>\n

B\u011b\u017en\u00e9 aplikace v automobilov\u00e9m a pr\u016fmyslov\u00e9m odv\u011btv\u00ed<\/span><\/h3>\n

\"hlin\u00edkov\u00e9<\/p>\n

Tlakov\u00e9 lit\u00ed je standardn\u00edm procesem pro v\u00fdrobu chladi\u010d\u016f, sk\u0159\u00edn\u00ed motor\u016f, dr\u017e\u00e1k\u016f, kryt\u016f elektroniky a sk\u0159\u00edn\u00ed p\u0159evodovek, u nich\u017e kvalita povrchu, rozm\u011brov\u00e1 p\u0159esnost a objem v\u00fdroby<\/strong> hraj\u00ed kl\u00ed\u010dovou roli. <\/span><\/p>\n

Metoda squeeze casting (lit\u00ed pod tlakem s dotlakem) se uplat\u0148uje tam, kde mechanick\u00e1 celistvost<\/strong> p\u0159edstavuje prioritu: brzdov\u00e9 t\u0159meny, t\u011bhlice \u0159\u00edzen\u00ed, ramena zav\u011b\u0161en\u00ed kol a hydraulick\u00e9 komponenty. Vhodn\u00fdmi kandid\u00e1ty pro tuto metodu jsou tak\u00e9 leteck\u00e9 sou\u010d\u00e1sti z hlin\u00edkov\u00fdch a ho\u0159\u010d\u00edkov\u00fdch slitin, u nich\u017e jsou kl\u00ed\u010dov\u00e9 parametry pom\u011br pevnosti k hmotnosti a odolnost proti \u00fanav\u011b materi\u00e1lu.<\/span><\/p>\n

N\u00e1kladov\u00e9 faktory obou metod odl\u00e9v\u00e1n\u00ed<\/span><\/h2>\n

V\u00fdb\u011br v\u00fdrobn\u00edho procesu se m\u00e1lokdy \u0159\u00edd\u00ed pouze kvalitou. Komer\u010dn\u00ed rentabilitu ovliv\u0148uje objem v\u00fdroby, investice do n\u00e1stroj\u016f i doba v\u00fdrobn\u00edho cyklu.<\/span><\/p>\n

N\u00e1stroje pro vysokotlak\u00e9 lit\u00ed (HPDC)<\/span><\/a> jsou obecn\u011b zpo\u010d\u00e1tku dra\u017e\u0161\u00ed. Formy pro HPDC vy\u017eaduj\u00ed \u0161pi\u010dkov\u00e9 n\u00e1strojov\u00e9 oceli a precizn\u00ed obr\u00e1b\u011bn\u00ed chladic\u00edch kan\u00e1lk\u016f, aby zvl\u00e1dly vysok\u00e9 vst\u0159ikovac\u00ed tlaky a dlouh\u00e9 v\u00fdrobn\u00ed s\u00e9rie. <\/span><\/p>\n

Formy pro squeeze casting maj\u00ed jednodu\u0161\u0161\u00ed konstrukci a ni\u017e\u0161\u00ed po\u0159izovac\u00ed n\u00e1klady, av\u0161ak tuto v\u00fdhodu je t\u0159eba posuzovat v kontextu del\u0161\u00ed doby v\u00fdrobn\u00edho cyklu.<\/span><\/p>\n

Skryt\u00e9 n\u00e1klady: Pro\u010d squeeze casting nen\u00ed v\u017edy lep\u0161\u00ed volbou<\/span><\/h3>\n

N\u011bkte\u0159\u00ed dodavatel\u00e9 mohou metodu squeeze casting prezentovat jako \u201enad\u0159azen\u00fd\u201c proces. Zde je v\u0161ak pravda, kterou v\u00e1m ne v\u017edy sd\u011bl\u00ed:<\/span><\/p>\n