Die Casting Molds and Materials
The advantages of Die Casting:
- Net shape part configuration is achievable.
- High dimensional accuracy is achievable.
- Fast production.
- Thinner walls are achievable when compared to investment and sand castings.
- Wide range of possible shapes.
- External threads can be casted.
- Holes can be cored to internal tap drill size.
The disadvantages of Die Casting:
- A relatively large production volume is required to make the process cost effective. (However, SKS would work with customers ways to mitigate this short coming.)
- High initial cost (tool, set up).
- Minimum wall thickness: 0.040".
- Maximum wall thickness: 0.200". In some cases acceptable up to 0.50".
- Draft radii and fillets required on the casting.
- Potential porosity issue.
Die and Cavity Materials
Die casting Dies for Aluminum and Zinc Alloys: P-20, H-11, H-13, Premium Grade H13 (per NADCA No.229), Superior Grade H13 (per NADCA No. 229), or other grades as defined in NADCA No. 229.
One of the best choice is Dievar.
SKS will guarantee 1/2 million shots tool life for tool making parts from zinc alloys.
SKS will guarantee 100K shots tool life for tooling making parts from aluminum alloys.