Advantages of Gravity Die Casting

Despite the obvious advantages of high and low pressure die casting they both have their inherent drawbacks. Low pressure die casting produces a decent finish and may be automated, but production quality is not as good as that which may be produced by high pressure casting. However high pressure die casting, despite being better suited to high production rates, produces items which are fairly porous and requires a high start up cost that may not be possible to achieve for smaller companies. Sand casting is the simplest method of producing non-ferrous castings however is only suitable for small production and it produces items with a rougher surface finish than any of the other methods.

In the event of your company needing to consider an alternative die cast production method, gravity die casting may solve some of these problems.

The Main Benefits of Gravity Die Casting

• In high pressure die casting you need a die casting machine to inject molten liquid metal into a die-casting mould, which then fills and solidifies under pressure. Gravity casting uses the weight of the metal to fill the cavity, which means you don’t need to shell out for an expensive die casting machine, thereby reducing tooling costs
• Gravity die casting is not especially suited to mass production however can be speedy due to reusable die tooling
• It produces a better surface than high pressure die casting, as well as low gas porosity and the obtaining of fine grain sizes
• It produces parts with better mechanical properties, which occur due to the faster cooling rates than would be found in regular die casting
• Gravity die casting is becoming increasingly more economically viable, especially when compared to conventional trial and error based die design and process development
• It has a higher casting rate than sand casting
• Gravity die casting produces the highest quality castings of all die casting methods

For further information on die casting services visit RD Castings.