RECOMMENDATION

There are some improvement that can be made to produce a good quality of metal casting product and those are:

a) Reduce pouring defect

Automatic machine can be used to pour the molten metal into the mold at

desired rate of speed to ensure the molten metal will freeze gradually and produce a

better quality product

b) Reduce shrinkage defect

A sprue included should be thicker than the section of the mold it is connected so

that it can supply the extra metal for the casting

c) Reduce blow hole defect

The green sand used should be stored in closed container so that it can keep the

moisture of the sand and the sand is not exposed to inert dust which will prevent any

trapped gases during the process of metal casting

d) Reduce metallurgical defect

Pouring should be done at a minimum temperature consistent with avoiding cold

metal defects and maintain high fill rate

e) Reduce sand inclusion defect

Increase the bentonite content of the sand by using a bentonite with a higher

specific binding capacity