casting manufacturing processes © 2012 su-jin kim gnu expendable mold casting process ( 소모성...
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![Page 1: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/1.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Expendable Mold CastingProcess ( 소모성 주형 주조 공정 )
1. Sand casting2. Shell mold casting3. Plaster mold casting4. Investment casting (lost wax casting)5. Lost foam casting
![Page 2: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/2.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Sand casting ( 사형주조 )
![Page 3: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/3.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Sand casting
http://www.youtube.com/watch?v=rgL2Jn5mk1A Manualhttp://ma.gnu.ac.kr/vod/casting/casting_tap.wmv Tap
• Use expendable sand molds• Low production rate(1–20 pieces/hour-mold)• Low cost, Recycle sand• Small quantity production• Complex entire parts at one time
![Page 4: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/4.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Shell mold casting ( 셸주조 )
• Fine sand mixed with a resin is heated by the pattern and hardened into a shell around the pattern
• Can produce castings with close dimensional tolerances, good surface finish and low cost.
![Page 5: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/5.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Plaster mold casting ( 석고주형 주조 ) • Plaster is mixed with water and poured over the
pattern.• Accurate, good surface and low melting point alloy
http://www.youtube.com/watch?v=xPSI1wUOBnk&p=9B6D9EAE75875D9D
![Page 6: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/6.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Investment casting ( 인베스트먼트 주조 , lost wax casting)• A wax pattern is coated by ceramic slurry that hardens
into the mold.• One pattern creates one part, which increases
production time and labor costs.• Complex geometries, good surface and high melting
point alloy.
SME: http://www.youtube.com/watch?v=PIneaDTZ16g
![Page 7: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/7.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Investment casting (lost wax casting)• Wax pattern Mold Pouring
Coin: http://www.youtube.com/watch?v=4Yvm6fUXf1UAerospace: http://www.youtube.com/watch?v=f7FXtnXVqzY
![Page 8: Casting Manufacturing Processes © 2012 Su-Jin Kim GNU Expendable Mold Casting Process ( 소모성 주형 주조 공정 ) 1.Sand casting 2.Shell mold casting 3.Plaster mold](https://reader030.vdocuments.site/reader030/viewer/2022012823/56649edd5503460f94bedfb2/html5/thumbnails/8.jpg)
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© 2012 Su-Jin Kim GNU© 2012 Su-Jin Kim GNU
Lost foam casting ( 소실모형주조 )
• Polystyrene patterns evaporate with molten metal to form a cavity for the casting.
Molding ( 금형 ) Patterns
Compact in sand
Coating
Casting Shakeout Manhole cover
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