QUICK SAND CASTING
Quick Sand Casting
ALUMINUMS, CAST IRON, BRONZE
Quick Sand Casting is the prototyping technique with rapid casting process by which real metal castings are made, directly in the definitive alloy, obtained thanks to classic foundry processes. This guarantees the best replication of the mechanical characteristics of the prototypes that come to be in all respects objects of pre-series.
This technique includes the manipulation of the 3D model of the part to be produced so that it can derive the design of a series of disposable pre-molds (motte) (made of sand and resin using rototype techniques) which will then be assembled and used for the actual casting of the molten alloy. The motts contain both the detail cable to be made and the undercut or core elements.
quick sand casting
Thanks to a suitable feeding system that is designed case by case, it is possible to cast the molten metal inside the forms. At the end of the casting the material of which the pre-molds are made slowly carbonizes (the only component of resin) thus allowing, at the end of solidification, to extract the metal jet which will be covered with sand. The fusion thus obtained must then be
deburred (elimination of the metal burrs on the junction points of the pre-molds) and finally sandblasted to ensure homogeneity of the surfaces.
The process of making prototypes Quick sand casting produces mechanical parts that are conformed to the standards of the mechanical industry of cast alloys.
This classification according to the ISO 8062 standard the details in classes CT (acronym of casting tolerance) of which below we report the most common values.
The table expresses the link between the reference dimension and the nominally tolerated maximum error
To Note: this value usually expresses a maximum threshold, normally the mistake made is significantly more modest than ISO 8062. Only in critical cases it is necessary to tolerate the maximum error, higher deviations only concern cases of very critical parts.