What is the process of gravity casting

What is gravity casting?

Gravity casting, also known as gravity Die Casting or permanent mold casting, is a casting process used to produce 

high-quality metal parts with excellent dimensional accuracy and surface finish. 

It is a popular method for manufacturing complex shapes and intricate designs.

Gravity Casting Offers Several Advantages:

Dimensional Accuracy

Gravity casting produces parts with tight tolerances and excellent dimensional

accuracy due to minimal shrinkage during solidification.

Surface Finish

The process yields parts with smooth surfaces that often require minimal post-casting finishing operations.

Material Flexibility

Gravity casting can be used with various non-ferrous metals like aluminum, zinc, copper alloys, etc.,

allowing for versatility in material selection based on specific requirements.

Cost-effective

Compared to other methods like Sand Casting or Investment Casting, gravity casting can be more cost-effective

for producing medium to high-volume production runs due to shorter cycle times and reduced labor costs.

What Is The Process Of Gravity Casting?

Understand the customer's needs

The procedure should start with understanding the customer’s needs, such as the application of the cast,

the choice of alloys, size, shape, wall thickness, technical properties 

(e.g.,tensile strength,yield strength, and elongation), structure, and weight.

Design Of The Cast And "Pattern" Making

This is important for Industrial Parts, which need precise calculation to make sure that pieces could fit and work together. 

Currently, the pattern making is assisted by computer simulation so that high precision can be achieved.

Then the pattern is moulded into a three-dimensional shape so that the accuracy of the core could be measured before the final casting.

Wood, clay or plastic is often used here. Due to the development of technology, now this can be done through 3D-printing.

Creation of a mould

Based on the confirmed pattern, a mould is created. In the case of gravity casting, reusable metal moulds are created for the desired pattern.

Melting and pouring of metal or alloys

Metal is melted and then the molten metal is poured into the mould under gravity. Traditionally, this is done by hand. 

Thanks to modern technology, this pouring process is automatised and the productivity is tremendously improved.

Fettling 

The cast object is removed from the mould and then fettled. During this process, any moulding materials on the model 

are removed and rough edges and surfaces are smoothed. The cast object might need to be further processed.

Conclusion

saivs has the experience, technical expertise and quality assurance processes to consistently and reliably deliver

an extensive range of precision castings with further processing.