In the table below, you will find a comprehensive list of the alloys we employ in the permanent mold casting process as well as their physical properties. Exceptions regarding alloys utilized in this process may be made based on the quantity of castings requested by the customer, job size, etc.
the use of a sand core was needed, the sand core is then removed from the casting leaving an internal passage throughout the interior of the casting.
The reusable cast iron molds are used time and time again, but the sand cores have to be replaced each time a part is cast.
In comparison to Green Sand Casting, the Permanent mold process can produce metallurgically uniform parts that have better mechanical properties, improved dimensional tolerances, better surface finishes, and less porosity than sand castings.
Generally, this process is well suited to large production jobs that do not reach the quantities that would permit or justify Die-Casting.
Permanent Mold Casting, sometimes referred to as "Gravity Die-Casting" is a casting process making use of reusable metal molds made of grey cast iron. These reusable (Permanent molds) are typically arranged in two halves. When a permanent mold casting requires a sand core, it is placed into position before the two halves are locked together.
Following the mold halves being being placed and locked together, the molten metal is poured into the mold and flows into the mold cavity. If a sand core was employed in the particular casting, the metal surrounds the sand core while simultaneously filling the mold cavity.
After the casting has had a short time to solidify, it is then removed from the mold. If