Gravity casting resin sand
Gravity casting resin sand
Gravity Casting
Gravity Casting
Gravity Casting
Gravity Casting

Permanent Mould Gravity Casting for repeat work

Omnidex Mining as an expert in Permanent Mold Gravity Casting​ has been producing quality Gravity Casting parts for the mining sector over many years. We are well-aware that a high level of skill is required to produce the high quality gravity castings demanded by the mining industry, and we always push for the highest quality standard to ensure our product is up to your expectation.

Our gravity casting process can produce parts with a smooth finish with all material specifications, dimensions and tolerances closely monitored and maintained. Just as the other casting processes we offer, we guarantee no porosity in our Gravity Casting parts. Learn more about our guarantee here.

What is different about Permanent Mold Gravity Casting

One of the oldest methods used for casting metals and alloys is permanent mold gravity casting. As its name suggests, the process involves molds that can be re-used many times, making this process ideal for mass production. While the production cost can be reduced for repeat projects, permanent mold gravity casting still sits between sand casting and die casting in terms of overall expense, with medium manufacturing and tooling costs. Check out our animation on how the process works:

Omnidex Permanent mold gravity Process Video

Permanent mold gravity casting has the following advantages:

The limitations and disadvantages of permanent mold gravity casting:

Our Expertise in Permanent Mold Gravity Casting

We ensure smooth metal flow and minimal casting defects by pre-heating the casting mold to between 150°C (300°F) and 260°C (500°F). We then apply a ceramic coating to the mold cavities to extend the mold’s working life and make it easier to remove the casting parts.

A crucial part of the process is the pouring of molten metal. The mold is usually made of two halves of iron or steel tooling (male and female halves). Cores made from resin or sand can also be added to make hollow parts. The best materials for permanent mold gravity casting are non-ferrous alloys with lower melting points, including aluminium, zinc and copper alloys. Materials with a higher melting point are not recommended, as they may wear down the mold more quickly.

It is worth noting that if the pouring process is not done evenly, there may be flow marks visible on the finished parts. That is why we have our own casting specialists supervising the entire process, ensuring the molten metal is poured into the mold at just the right speed. After the casting is done, all sprues and runners are accurately trimmed, then cleaned and painted (if required) by an experienced crew of workers.

Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part
Gravity Casting Part

If you are looking to set-up a permanent mold gravity casting production, feel free to contact us. We can help you find the solution best-suited for your needs. Don’t forget to check out other casting processes on our website!

Get in touch with Omnidex Mining if you need more information or a quote.

Contact us

Phone no.:
Asia Pacific, South America, Africa and rest of the world:
+86 20 8388 7080
Australia: +61 800 765 630
UK: +44 (0)808 123 0080
USA/Canada:  + 1 (800) 967 2110

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