What is Design Geometry? - Sunrise Metal Technology Co., Ltd

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What is Design Geometry?

Design Geometry

There are a number of geometric features to be considered when creating a parametric model of a die casting:

Draft is the amount of slope or taper given to cores or other parts of the die cavity to allow for easy ejection of the casting from the die. All die cast surfaces that are parallel to the opening direction of the die require draft for the proper ejection of the casting from the die. Die castings that feature proper draft are easier to remove from the die and result in high-quality surfaces and more precise finished product.

Fillet is the curved juncture of two surfaces that would have otherwise met at a sharp corner or edge. Simply, fillets can be added to a die casting to remove undesirable edges and corners.
Parting line represents the point at which two different sides of a mold come together. The location of the parting line defines which side of the die is the cover and which is the ejector.

Bosses are added to die castings to serve as stand-offs and mounting points for parts that will need to be mounted. For maximum integrity and strength of the die casting, bosses must have universal wall thickness.

Ribs are added to a die casting to provide added support for designs that require maximum strength without increased wall thickness.

Holes and windows require special consideration when die casting because the perimeters of these features will grip to the die steel during solidification. To counteract this affect, generous draft should be added to hole and window features.

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