Geometry
Dimensional
Accuracy (+/- 0.001 inches per inch)
Too Low: 3
Easily Achieved: 5 or higher
Surface
Roughness (microinches)
Too Low: 50
Easily Achieved: 125 or higher
Bounding
Box Volume (cubic inches)
Low: 10 - 50
Just Right 50 - 1400
High: 1400 - 5000
Wall
Thickness
Uniform Walls Prefered: Yes
Max Wall Thickness (inches): 1
Min Wall Thickness (inches): 0.18
(over a 5" inch span)
Rounded Corners Prefered:
Yes
Compatible
Shapes:
Complex shapes can be
produced with relatively little labor, and the process can be automated
fairly easily. Shell-mold casting applications include small mechanical
parts requiring high percision, such as gear housings, cylinder
heads, and connecting rods. Shell molding is also widely used in
producing high-percision molding cores, such as engine water block
jackets.
Compatible shapes are
of the following categories:
- Free Form Drape
- Planar
- Prismatic
- Surface of Revolution
- Constant Cross Section
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