Design Tips for Die Casting Parts

die casting design tips

Design Tips for Die Casting Parts

When a product design start with new product design or development, he/they must encounter different design issues. like many tips for injection molding parts, CNC machining parts, as well as die casting metal parts. Since they are made from different material and process. You should or must follow their rules that would make your products have good manufacturability and cost-saving.

Here below we would like to share some tips on how to design a perfect die casting parts.

The Thickness of  Wall

As you know, the thickness of wall is one of the most important element for manufacturing cost and parts function. If you a good designer, you must take it as first consideration during your part design. Otherwise it will result in many problem in future’s production. Like some visible surface flowlines and air pockets that create internal porosity in the part.

When the main wall has outstanding features, make sure they do not add too much to increase the thickness of the wall.

Fillet and radius

Perhaps you might know that, when a die casting part designing, the purpose of adding fillet / radius is mainly to enhance the part strength in structural, meanwhile it’s also a good way to boost metal flow when die casting process, so when you design a die casting parts, try to use proper fillets to prevent high stress concentrations, on the other hand, if proper use of fillets can also reduce the die maintenance costs and increase the life of the tool.

Ribs for die casting parts

When you design a die casting part, you must add ribs on thin walls. which can increase the stiffness and add strength in part structure. Often, the addition of ribs can do more to strengthen a component than solid material because of the porosity, and ribs result in a lighter part. Improper rib design can result in the concentration of working stresses or the creation of unnecessary stresses at the edges of the ribs. You must place the ribs in the proper locations for the ejector pins to be placed on the ribs for ejection strength.

On the other hand, the ribs should assist the flow of molten metal. Whenever possible, include radii and fillets with ribs to reduce the number of quick changes at sharp corners and in cross sections.

Draft for Die Casting Parts

A product designer must consider proper drafts for a die casting part. Just like the draft angle for plastic injection mold. The draft refers to the taper or slope assigned to cores and other parts of the die cavity. This element prevents the casting from getting trapped in the mold or tool during the ejection of the casting, making it much easier to open the die and easily eject the casting from the die casting die. Always try to introduce drafts in the process as early as possible. So that the die casting mold would be easy to open and get the part ejected will result in a part that is more precise for straightness/flatness and one that has a higher surface quality.

All in one, when you design a die casting parts, you should always consider its function, cost, and die casting process. those elements are very important for die casting even any other manufacturing industries. We hope this information is helpful for you.

If you still have any other question, or you have any die casting project to run, please don’t hesitate to contact Eco die casting’s team to help, thank you!


Mr. Yu, the founder of Eco die casting manufacturer. Focus on alloy die casting over 20 years. Offer high quality die casting service, 30% cheaper than other die casting companies.

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