Casting Processes
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03-01-2011, 11:01 AM




Metal Casting
 Create liquid metal - Melting
 Combustion used to melt material
 Electricity used to melt material
 Create solid shape - Casting
 Permanent mold casting
 Semi Permanent mold casting
 Consumable mold casting

Oxy-fuel Furnace
 Uses a fuel gas such as propane, natural
gas or acetylene
 Oxygen or atmosphere is blown in and
combined with fuel
 Heat from combustion melts the charge

Resistance Furnace
 A current passed through a material
resulting in ohmic heating
 Radiation heats charge material
 Some convection and conduction occurs

Induction Furnace
 A current is passed through a water
cooled coil near or around the charge
 Eddy currents are produced in the charge
material in response to the coil current
 Heat is generated through ohmic heating
in the material

for more:
docs.googleviewer?a=v&q=cache:CQ_VgdWMWz8J:mse.mtu.edu/casting/Casting_Processes.pdf+Casting+Processes+pdf&hl=en&gl=in&pid=bl&srcid=ADGEESjglH5NwW1uBfO-MOm2OgRPvvhvvOViJchEMIaanLMisgfJqVwMeBEBOUH8mIuRbSaAIT_TcLityH16k4ewTbtmtbELMfWUhvG6GuGiTNWe3XTZHSLSWy9tJZJHr3n0XDfGdx4l&sig=AHIEtbQC4MvqlgTP27bXsjiu0SrnzW1SgA



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seminar flower
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Posts: 10,120
Joined: Apr 2012
#2
26-05-2012, 02:47 PM

Casting Processes


.pdf   Casting Processes.pdf (Size: 3.15 MB / Downloads: 162)

Types of Parts Made

Engine blocks
•Pipes
•Jewelry
•Fire hydrants

Complex, 3-D shapes

Near net shape
•Low scrap
•Relatively quick process
•Intricate shapes
•Large hollow shapes
•No limit to size
•Reasonable to good surface finish

Processes

Sand
•Shell
•Plaster
•Ceramic
•Investment
•Lost foam
•Pressure
•Vacuum
•Die
•Centrifugal
•Squeeze
•Semi-solid
•Single crystal
• Directional solidification
•Slush
•Continuous

Metals processed by casting

•Sand casting – 60%
•Investment casting – 7%
•Die casting – 9%
•Permanent mold casting – 11%
•Centrifugal casting – 7%
•Shell mold casting – 6%

Capabilities

•Dimensions
–sand casting - as large as you like
–small - 1 mm or so
•Tolerances
–0.005 in to 0.1 in
•Surface finish
–die casting 8-16 micro-inches (1-3 mm)
–sand casting - 500 micro-inches (10-25 mm)
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