31_10_2011__15757_vjezbe2011.ppt
DESCRIPTION
ljevanjeTRANSCRIPT
![Page 1: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/1.jpg)
LIJEVANJE U PIJESAK
![Page 2: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/2.jpg)
KLASIFIKACIJA POSTUPAKA LIJEVANJA
![Page 3: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/3.jpg)
UDJELI POJEDINIH POSTUPAKA LIJEVANJA
![Page 4: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/4.jpg)
• najrašireniji postupak lijevanja• primjenjiv za lijevanje gotovo svih materijala• dimenzije odljevaka mogu biti od malih do vrlo velikih• veličine serija od jednog komada do milijunskih serija• koristi se kalup izrađen od kalupne mješavine
LIJEVANJE U PIJESAK
![Page 5: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/5.jpg)
KALUPNA MJEŠAVINA
• tipična mješavina: 90% pijeska, 3% vode, 7% gline i dodaci
• potrebna svojstva: čvrstoća, propusnost, vatrootpornost, oblikovljivost, rasipljivost, ekomoničnost i jednostavnost nabave
osnovni materijal vezivo dodaci+ +
kremeni pijesak kvarcni pijesak
(olivinski, cirkonski,kromitni))
glina (kaolinska, bentoitna)cement
vodeno staklofenolne i furanske smole
kameni ugljengrafit
koksni prahsmola
![Page 6: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/6.jpg)
OSNOVNA OBILJEŽJA KALUPA
gornjak
pojilo
ušće
čaška
razvodnikdonjak
spust
jezgra
linija dijeljenja
Kalup: donjak+gornjak
Kalupnik – posuda, okvir
Razdjelna linija – linija kojarazdvaja gornjak i donjak
Model – kalupna šupljina
Jezgra- oblikuje unutrašnjost odljevka
Uljevni sustav – čaška, spust,razvodnik, ušće
Pojilo – izvor taline kako bi senadoknadio materijal jertijekom skrućivanja dolazido smanjenja volumena
![Page 7: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/7.jpg)
POSTUPAK IZRADE ODLJEVAKA U PJEŠĆANOM KALUPU
NACRT IZRATKA
![Page 8: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/8.jpg)
POSTUPAK IZRADE ODLJEVAKA U PJEŠĆANOM KALUPU
GOTOV IZRADAK JEZGRA MODEL
![Page 9: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/9.jpg)
POSTUPAK IZRADE ODLJEVAKA U PJEŠĆANOM KALUPU
model sa uljevnim sustavom
dvodjelni model
uljevni sustav
![Page 10: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/10.jpg)
POSTUPAK IZRADE ODLJEVAKA U PJEŠĆANOM KALUPU
![Page 11: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/11.jpg)
POSTUPAK IZRADE ODLJEVAKA U PJEŠĆANOM KALUPU
GOTOVI ODLJEVAK
![Page 12: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/12.jpg)
PROIZVODNI PROCES U LJEVAONICI
![Page 13: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/13.jpg)
PRIMJERI ODLJEVAKA
![Page 14: 31_10_2011__15757_vjezbe2011.ppt](https://reader035.vdocuments.net/reader035/viewer/2022062320/55cf9b49550346d033a571d4/html5/thumbnails/14.jpg)