Casting palladium - the building process
After you design the palladium casting properly following all the basic principles of a qualitative and hassle free casing, you may follow a few steps that would make your process more convenient and safer. You should proceed ahead by building a tree that would have multiple pieces.
The pieces will be separately and strategically attached to the main tree system you have built up. Palladium is lighter than many other precious metals like platinum in particular and you can add more pieces to your tree without any fear of overweight. Such addition will also not cause any damage to the investment mold.
Once you build up the tree, you can apply some protective coating like the ceramic shell coating. It will be better if you use a phosphate based investment for palladium and platinum casting. This is different from the gypsum based investments used for gold and such other metals.
Many manufacturers now use the programmable electric ovens to accomplish the burnout process before the actual casting palladium is taken up. They also use the high frequency centrifugal casting machines for the purpose of actual casting. This machine can also be used for casting of steel and platinum.
Thereafter palladium is melted using ceramic crucibles at very high temperature. Zirconium oxide is used to prevent reactions of molten palladium being oxidized or becoming porous. Often the optical pyrometer is used to measure the temperature of the molten metal, a process that is specific to all types of precious metal casting and the casting is completed at the right temperature level.
The pieces will be separately and strategically attached to the main tree system you have built up. Palladium is lighter than many other precious metals like platinum in particular and you can add more pieces to your tree without any fear of overweight. Such addition will also not cause any damage to the investment mold.
Once you build up the tree, you can apply some protective coating like the ceramic shell coating. It will be better if you use a phosphate based investment for palladium and platinum casting. This is different from the gypsum based investments used for gold and such other metals.
Many manufacturers now use the programmable electric ovens to accomplish the burnout process before the actual casting palladium is taken up. They also use the high frequency centrifugal casting machines for the purpose of actual casting. This machine can also be used for casting of steel and platinum.
Thereafter palladium is melted using ceramic crucibles at very high temperature. Zirconium oxide is used to prevent reactions of molten palladium being oxidized or becoming porous. Often the optical pyrometer is used to measure the temperature of the molten metal, a process that is specific to all types of precious metal casting and the casting is completed at the right temperature level.