The Complete DFM Guide for Die Casting Parts (With Examples)-Ribs and Fillets

Design for Manufacturing (DFM) in die casting is the process of optimizing part geometry to ensure it can be produced efficiently, with high quality, and at the lowest possible cost. When parts are designed with the casting process in mind, you reduce defects like porosity, warping, and "cold shuts."

Here is a comprehensive guide to the essential DFM principles for die casting.

Sharp corners are the enemy of die casting. They create stress concentrations in the tool and impede the flow of molten metal.

• Fillets and Radii: Use generous radii on all corners. This strengthens the part and prevents the die from cracking over time (heat checking).

• Ribs: Use ribs to provide stiffness instead of increasing wall thickness. Ribs should be 0.7 to 0.9 times the thickness of the wall they are attached to.

• Rib Spacing: Space ribs apart by at least 3 times the wall thickness to prevent hot spots