30-11-2012, 03:08 PM
Casting Processes
Casting_Processes.pdf (Size: 941.02 KB / Downloads: 59)
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
Permanent Mold Casting
Mold that can be used repeatedly
Commonly associated with die casting
Mold material varies with metal to be cast
Used for large number of pieces to be
cast due to initial cost of the mold
Semi-permanent Casting
A mold is made with both permanent and
single use parts
Consumable parts are usually cores
made of chemically bonded sand
After each pour the mold is cleaned and
new consumables are added