What is Sand Casting
Edeb Engineering Sand casting is a process that utilizes non-reusable sand molds to form metal castings. It is a common production method for metal components of all sizes, from a few ounces to several tons. Sand casting isn’t only versatile in the size of its products – it can also create exceptionally complex or detailed castings, and can be used to cast nearly any metal alloy.
Why use sand casting?
Sand casting has several benefits including:
Low tooling costs and fast set-up compared to investment or die casting.
Large casting sizes possible. Aluminium alloys up to 110kg and ferrous alloys up to 3000kg using sand casting methods.
Complex and intricate castings can be achieved with multiple internal cores.
It is possible to achieve low gas porosity for pressure tight castings.
Up to 70% of the sand used in the process is reclaimed.
Very versatile; many different kinds of metal alloy can be cast using this process.
Sand casting is best suited to low volume or complex non-ferrous castings or large ferrous castings.
Sand Casting Process
A wood, resin or metal pattern is made which forms an impression of the component to be cast.
The pattern is used to make a mould, usually in greensand or resin bonded sand.
If cores are required to form internal structures, these are made in CO2 or resin sand.
Molten metal is poured into the mould, which is then allowed to solidify.
The casting is then removed from the mould and up to 70% of the sand is reclaimed.
The casting then goes through the fettling process to remove the risers and excess material
Castings often undergo further surface finishing before dispatch to the customer