Lost Wax |
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Melt wax |
Pre-expand styrofoam |
Pre-expand styrofoam bead |
Inject wax into aluminium tool |
Inject styrofoam beads into aluminium tool |
Inject styrofoam beads into aluminium tool |
Assemble wax components |
Assemble styrofoam components |
Assemble styrofoam components |
Degrease assembly |
Apply primary slurry and stucco |
Apply primary refractory paint |
Apply primary slurry and stucco |
Dry |
Dry |
Dry |
Apply back-up slurry and stucco |
Inspect coating and apply second coat as necessary |
Apply back-up slurry and stucco |
Dry |
Dry |
Dry |
Repeat above 3-5 times |
Position coated styrofoam replicas in casting box |
Repeat above 5-10 times |
Final dry |
Pour metal |
Final dry |
Fire shell |
Remove coating and finish casting |
Autoclave - dewax |
Inspect and clean shell |
Suitable for non-ferrous alloys and irons. Not suitable for steel. |
Fire shell |
Position cold shells in casting box and surround with sand |
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Inspect and clean shell |
Pour metal into cold shell |
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Pre-heat shell |
Remove shell and finish casting |
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Pour metal into hot shell |
Suitable for all alloys. Not ideal for very thin section parts (e.g. <2mm). |
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Remove shell and finish castings |
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Suitable for all alloys. Less suited for heavy section components. |
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