The Complete DFM Guide for Die Casting Parts (With Examples)-Parting Line and Ejector Pins

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.

The Parting Line is where the two halves of the die meet.

• Keep it Flat: A flat parting line is much cheaper to tool than a stepped or curved one.

• Flash: Some "flash" (excess metal) will always occur at the parting line. Place the parting line on non-aesthetic or non-functional surfaces whenever possible.

• Ejector Pin Marks: Ejector pins leave small circular marks on the part. Designate "dead" zones on the part where these marks won't interfere with the appearance or function