When we are looking for the right alloy for metal casti […]
When we are looking for the right alloy for metal castings, aluminum occupies the top spot particularly due to the high quality and easy availability of the ore. Moreover, aluminum could easily be obtained from molten tins and cans that could easily be collected from bins and trashes. The reason why aluminum gets selected for most of the metal casting needs can be attributed to its favorable properties and characteristics. Aluminum Casting could be a part of someone's hobby as an artist, sculptor, or it may be carried out to repair some useful appliances.
It is pretty easy to manage a furnace at home to burn and melt aluminum so as to cast it. A number of households find the use of charcoal as an efficient fuel to easily obtain molten aluminum metal. Artists and sculptors who make fine arts with molten aluminum are sometimes found to melt the metal using propane as the fuel. But for a beginner, charcoal would play the role of the fuel with much ease.
While tins and soda cans serve as the most commonly available source for aluminum for household and artistic casting purposes, large scale casting requires aluminum from other direct sources. Soda cans should be crushed and ground into smaller sizes which could easily be molten in a crucible or any such area meant for the purpose. Also, it should be made sure that the amount of tins and cans collected could be very well enough to get molten aluminum so as to complete the casting.
Casting aluminum could be completed in three known types of casting, namely, lost foam casting, sand casting, and investment casting. Casters can employ any of these processes to finish their task. Although aluminum casting could be performed in any of the metal casting techniques known to us, the final selection of the process depends upon the metal caster. Of these, the casting done using sand along with a bonding agent could be spotted as the most practiced one. Although inexpensive, sand casting could not be employed to finish casting with finer details.
Lost foam casting is so named because of the steps used in implementing the technique. In lost foam technique, a copy of the item to be cast is made using foam covered with ceramics that gets evaporated. This cast is then filled in by molten aluminum during a later stage of the casting process. This is also a cheaper method to do it.