Design tips for improved die casting

Die casting is a highly efficient and precise manufacturing process capable of producing complex metal components across industries. Achieving the best results starts with a well-optimised component design. The following guidelines highlight key die casting design principles that enhance performance, manufacturability, and cost efficiency.

Key die casting variables

Draft

Incorporating draft angles — a slight taper on component walls — is essential for smooth component ejection and to account for material shrinkage. A draft angle between ¼ to 1 degree per side is generally recommended, though the exact amount varies based on the alloy and casting process.

Fillets and radii

Generous fillets and radii strengthen components, improve metal flow, and simplify finishing. Rounded edges reduce stress concentrations and improve component durability, making them a critical element in every die casting design.

Ribs and bosses

Ribs and bosses reinforce components without adding unnecessary weight. Ensure they integrate smoothly with fillets and radii to avoid sharp transitions. Applying draft to non-critical surfaces helps improve tool life and facilitates metal flow during casting.

Pockets

Adding pockets within solid sections reduces component weight and shortens cycle time. Maintain consistent draft angles and radii within pocketed areas to prevent stress points and ensure proper ejection.

Optimising material flow

Effective metal flow design ensures uniform filling and reduces defects. Components should feature smooth corners, rounded holes, and even wall thicknesses. Avoid long, narrow slots or abrupt changes in geometry that restrict metal flow and increase porosity risk.

Additional design considerations

Maximise the potential of the die casting process by integrating functional and aesthetic design features, including:

• Company logos or brand marks
• Surface textures or decorative finishes
• Integrated fasteners or attachment points
• Embossed or recessed component numbers

For components with intricate geometries, Dynacast's Multi-Slide die casting technology provides unmatched flexibility and precision, enabling complex designs with minimal secondary operations.

Partnering for optimised die casting design

Dynacast's Design for Manufacturing (DFM) services help engineers refine designs for better performance, reduced waste, and cost-effective production. Our experts collaborate closely with customers to ensure each component meets functional requirements while maximising manufacturability and consistency.