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SLIP CASTING (Slurry requirements (High solid content (Good green…
SLIP CASTING
Define
Is a suspension of metal or ceramic powder (5μm) in water or other suitable liquid which is poured into an absorbent (plaster of Paris) mold dried and subsequently sintered
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Type of Casting
Drain Casting
The mold is inverted to drain excess slip after a semi-solid layer has been formed, thus producing a hollow product
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Solid Casting
To produce solid products, adequate time is allowed for entire body to become firm
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Steps
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:star: Water will be absorbed from the slip into the porous mold or else excess water can also be removed by external pressure
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:star: The finish piece will be removed from the mold and trimmed, sometimes a mold releasing agents such as oils, starch or graphite are used
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Important criterion
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Cast with good properties such as dense, solid with good green strength and not easily cracks
Controls parameter
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Thixotropy
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what if high thixotropy?
:forbidden: it will be too viscous, the water could not flow and will be remain in the casting
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Slurry requirements
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- Stable and no chemical reaction and particles always in suspension (deflocculant)
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:explode: AUNI FARHA NASHUA BT ABU HASMADI
:explode: 138683
:explode: THIRD YEAR, SCHOOL OF MATERIALS AND MINERAL RESOURCES ENGINEERING
