| Contents |
| |
Composition
and constituents in green sand. |
| |
Preparation
techniques during mixing. |
| |
Role
of each additives in deciding properties of green
sand. |
| |
Correct
cycle of sand mixing and controlling parameters
and recycling. |
| |
Behavior
of moulding sand after pouring of moulds.
|
| |
The
metal mould surface reactions, evolution of gases,
effect of temperature on the sand properties,
expansion of sand grains. |
| |
Casting
defects related to moulding sand practices such
as scabs, sand inclusion, sand fusion, metal penetration,
rough surface finish etc. |
| |
Principles
and correct procedures of moulding sand properties
like, A.F.S. Fineness No., A.F.S. Clay content,
Methylene Blue test, Green compression, Permeability
and Compactibility tests. |
| |
Interrelation
between above sand properties and use of control
charts. |
| The
video film NCTS 106 and set of CD 105 give logical
understanding sand system controls to foundry
engineers. It is useful for training workers,
supervisors, engineers working on shop floor to
help them to control rejection level to minimum. |
| The
set of films and CDs is supplemented with exhaustive
notes on Green Sand Moulding Practices. |