Mold Design and Casting > Creating Mold and Cast Features > Tangent Draft > To Create a Curve-Driven Tangent Draft
  
To Create a Curve-Driven Tangent Draft
A curve-driven tangent draft adds material on one or both sides of a parting surface between a reference curve (such as a parting curve or a sketched curve) and surfaces of the reference part, tangent to these surfaces. In order to create a curve-driven tangent draft, you must first create a reference curve (see examples).
1. Click Mold > Parting Surface. The Parting Surface tab opens.
2. Click Surfacing > Blend Tangent to Surfaces. The SURFACE: Tangent Surface dialog box opens, with selected by default.
3. If the Pull Direction has not been specified yet, define it.
4. Select the type of geometry:
Solid Draft—The draft is created as a solid feature, by adding material to the reference part.
Surface Draft—The draft is created as a surface feature.
Draft Curve—The system does not add material or create surfaces. It just calculates the draft curves resulting from intersection of the tangent draft surfaces with the reference part geometry.
5. Select the Direction option:
One Sided—The draft is created only on one side of the reference curve. If you are creating a solid draft, use the parting surface to contain the material.
 
* In this case, the parting surface is simply a surface that parts the core and the cavity. It is not the same assembly level parting surface in molds.
Two Sided—The draft is created on both sides of the reference curve.
6. Click the References tab, click under Draft Line, and select the reference curve. The reference curve must lie outside of the reference part geometry. For more information on the reference curve requirements, follow the link below.
7. You do not have to select the surfaces to which the draft will be tangent, the system will determine them automatically. However, if you are not satisfied with the automatic selection, you can click under Tangent To and select the appropriate surfaces on the reference part.
8. Click to preview the tangent draft geometry. You can change the draft geometry, if necessary, by specifying the Spine Curves, Closing Surfaces, or Cap Angle, located on the Options tabbed page. You can also edit the reference curve by using the Curves tabbed page.
9. If required, in the TANGENT DRAFT dialog box, click Feature > Info to obtain information about the tangent draft or Feature > References to obtain information about the references used to create the tangent draft.
10. When satisfied with the feature geometry, click to close the dialog box and create the feature.