Sand Casting Flashcards
What types of process is casting ?
-Krystian S
A reforming process
What are the two types of casting ?
-Krystian S
Sand casting
Die casting
In sand casting what are the two types of sand that can be used?
-Krystian S
Green sand
Petrobond
What is used to hold together green sand?
-Krystian S
Water
What is used to hold petrobond together?
-Krystian S
Oil
What property of the metal is essential for sand casting?
-Oscar Lawson
For it to have a high melting point
Eg- Aluminium’s 750 degree C melting point
How can you make the pattern for sand casting?
-Oscar Lawson
It is made of wood that is either formed by hand or by a CNC machine
What is the lost pattern method of sand casting?
-Oscar Lawson
When polystyrene is used and is burnt when in contact with the molten metal
Is the pattern a reverse image or exact replica of the final product?
-Oscar Lawson
Exact replica. The mould is a reverse image
What must you ensure with your pattern so that it will work when sand casted?
-Oscar Lawson
The edged are draft angles (to help it slide in and out of the sand)
The corners must also be radiused (slightly rounded)
What is casting?
-Torsai K
Casting is a re-forming process as molten metal is poured into a mould to be reformed
What are the two types of casting?
-Torsai K
Sand casting (most important) Die casting
What is used in schools due to a low melting point for sand casting?
-Torsai K
Aluminum (750 degrees celsius)
What is used to hold green sand together?
-Torsai K
Water
What is used to hold petrobond together?
-Torsai K
Oil
