{"id":17864,"date":"2025-03-23T13:46:46","date_gmt":"2025-03-23T05:46:46","guid":{"rendered":"https:\/\/moldiecasting.com\/?p=17864"},"modified":"2026-10-08T21:05:15","modified_gmt":"2026-10-08T13:05:15","slug":"investment-casting-vs-die-casting","status":"publish","type":"post","link":"https:\/\/moldiecasting.com\/sk\/blog\/investment-casting-vs-die-casting\/","title":{"rendered":"Presn\u00e9 alebo tlakov\u00e9 liatie: ktor\u00e1 met\u00f3da je vhodnej\u0161ia pre v\u00e1\u0161 projekt?"},"content":{"rendered":"

\"\"<\/h2>\n

K\u013e\u00fa\u010dov\u00e9 zhrnutie<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
K\u013e\u00fa\u010dov\u00e9 body<\/strong><\/th>\nPresn\u00e9 liatie<\/strong><\/th>\nTlakov\u00e9 liatie<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Proces<\/strong><\/td>\nPou\u017e\u00edva sa voskov\u00fd model pokryt\u00fd keramikou; vosk sa roztav\u00ed a vytvor\u00ed dutinu formy.<\/td>\nRoztaven\u00fd kov sa pod vysok\u00fdm tlakom vstrekuje do opakovane pou\u017eite\u013enej oce\u013eovej formy.<\/td>\n<\/tr>\n
Materi\u00e1ly<\/strong><\/td>\nKovy s vysokou teplotou tavenia (oce\u013e, nehrdzavej\u00faca oce\u013e, tit\u00e1n, superslitiny).<\/td>\nNe\u017eelezn\u00e9 kovy (hlin\u00edk, zinok, hor\u010d\u00edk, me\u010f).<\/td>\n<\/tr>\n
Tolerancie<\/strong><\/td>\nStredn\u00e9 (\u00b10.5 mm a\u017e \u00b10.1 mm).<\/td>\n\u00dazke (\u00b10.05 mm a\u017e \u00b10.2 mm).<\/td>\n<\/tr>\n
Kvalita povrchu<\/strong><\/td>\nDobr\u00e1 (Ra 1.6\u20136.3 \u03bcm); m\u00f4\u017ee vy\u017eadova\u0165 dodato\u010dn\u00fa \u00fapravu.<\/td>\nVynikaj\u00faca (Ra 0.8\u20133.2 \u03bcm); minim\u00e1lne n\u00e1sledn\u00e9 spracovanie.<\/td>\n<\/tr>\n
N\u00e1klady<\/strong><\/td>\nVy\u0161\u0161ie n\u00e1klady na kus pri mal\u00fdch s\u00e9ri\u00e1ch; ni\u017e\u0161ie n\u00e1klady na n\u00e1stroje.<\/td>\nVysok\u00e9 po\u010diato\u010dn\u00e9 n\u00e1klady na formu; ni\u017e\u0161ie n\u00e1klady na kus pri ve\u013ek\u00fdch objemoch.<\/td>\n<\/tr>\n
Objem v\u00fdroby<\/strong><\/td>\nIde\u00e1lne pre mal\u00e9 a\u017e stredn\u00e9<\/strong> objemy v\u00fdroby (prototypy, z\u00e1kazkov\u00e9 s\u00fa\u010diastky).<\/td>\nNajvhodnej\u0161ie pre ve\u013ekoobjemov\u00fa<\/strong> s\u00e9riov\u00fa v\u00fdrobu.<\/td>\n<\/tr>\n
Zlo\u017eitos\u0165 s\u00fa\u010diastky<\/strong><\/td>\nVe\u013emi zlo\u017eit\u00e9 geometrie, jemn\u00e9 detaily a vn\u00fatorn\u00e9 prvky.<\/td>\nStredn\u00e1 zlo\u017eitos\u0165; mo\u017en\u00e9 s\u00fa tenk\u00e9 steny a jemn\u00e9 detaily.<\/td>\n<\/tr>\n
Pou\u017eitie<\/strong><\/td>\nLetectvo a kozmonautika, \u0161perky, zdravotn\u00edcke implant\u00e1ty, umeleck\u00e9 predmety.<\/td>\nAutomobilov\u00e9 diely, spotrebn\u00e1 elektronika, spotrebi\u010de, kovanie.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u010co je presn\u00e9 liatie?<\/h2>\n

Presn\u00e9 liatie je met\u00f3da presn\u00e9ho tvarovania kovov, ktor\u00e1 vytv\u00e1ra zlo\u017eit\u00e9 s\u00fa\u010diastky s vynikaj\u00facou kvalitou povrchu a rozmerovou presnos\u0165ou.<\/p>\n

Presn\u00e9 liatie m\u00e1 tis\u00edcro\u010dn\u00fa hist\u00f3riu. Starovek\u00e9 civiliz\u00e1cie v \u010c\u00edne, Egypte a Mexiku pou\u017e\u00edvali ran\u00e9 podoby tejto techniky na v\u00fdrobu zlo\u017eit\u00fdch bronzov\u00fdch predmetov a \u0161perkov pribli\u017ene v roku 4500 pred n. l.<\/p>\n

Proces sa naz\u00fdval aj \u201eliatie na vytavite\u013en\u00fd model\u201c, preto\u017ee sa pou\u017e\u00edvali voskov\u00e9 modely, ktor\u00e9 sa roztavili a odstr\u00e1nili.<\/p>\n

Po\u010das priemyselnej revol\u00facie za\u010dali t\u00fato met\u00f3du pou\u017e\u00edva\u0165 zub\u00e1ri na v\u00fdrobu koruniek a inlayov.<\/p>\n

V 1940. rokoch vyvolala druh\u00e1 svetov\u00e1 vojna vysok\u00fd dopyt po presn\u00fdch s\u00fa\u010diastkach, v\u010faka \u010domu sa presn\u00e9 liatie roz\u0161\u00edrilo v priemyselnej v\u00fdrobe.<\/p>\n

Po\u010d\u00edta\u010dov\u00e9 modelovanie a automatizovan\u00e9 zariadenia dnes proces v\u00fdrazne zdokonalili. Modern\u00e9 presn\u00e9 liatie dosahuje tolerancie a\u017e \u00b10.5 mm.<\/p>\n

Proces a techniky<\/h3>\n

Presn\u00e9 liatie sa za\u010d\u00edna v\u00fdrobou voskov\u00e9ho modelu, ktor\u00fd presne kop\u00edruje po\u017eadovan\u00fa s\u00fa\u010diastku.<\/p>\n

Model sa potom pripevn\u00ed na \u201estrom\u010dek\u201c s \u010fal\u0161\u00edmi voskov\u00fdmi modelmi. Zostava sa opakovane nam\u00e1\u010da do keramickej suspenzie a oba\u013euje \u0161tukov\u00fdm materi\u00e1lom, a\u017e vznikne \u0161krupina.<\/p>\n

(\u201eStrom\u010dek\u201c ozna\u010duje rozvetven\u00fa kon\u0161trukciu, ktor\u00e1 po\u010das v\u00fdroby formy dr\u017e\u00ed viacero voskov\u00fdch modelov pohromade.)<\/em><\/p>\n

Po vytvrdnut\u00ed sa \u0161krupina vlo\u017e\u00ed obr\u00e1tene do pece. Vosk sa roztav\u00ed a vyte\u010die (odtia\u013e n\u00e1zov \u201eliatie na vytavite\u013en\u00fd model\u201c), \u010d\u00edm zostane dut\u00e1 keramick\u00e1 forma.<\/p>\n

Pred naliat\u00edm roztaven\u00e9ho kovu sa forma predhreje na vysok\u00fa teplotu. Po ochladen\u00ed sa keramick\u00e1 \u0161krupina rozbije a odkryje odliatky. Z\u00e1vere\u010dn\u00e9 kroky zah\u0155\u0148aj\u00fa oddelenie s\u00fa\u010diastok od strom\u010deka a ich dokon\u010denie.<\/p>\n

Materi\u00e1ly na presn\u00e9 liatie<\/h3>\n

Presn\u00e9 liatie umo\u017e\u0148uje spracova\u0165 \u0161irok\u00fa \u0161k\u00e1lu kovov a zliatin. Medzi be\u017en\u00e9 materi\u00e1ly patria:<\/p>\n

\u017delezn\u00e9 zliatiny:<\/strong><\/p>\n