Draft Command

Draft Command

The Draft command in Inventor Fusion can be used to modify one or more component bodies by creating angled faces, with respect to a neutral plane.

The Draft command in Inventor Fusion can be used to modify one or more component bodies by creating angled faces, with respect to a neutral plane.

A primary goal of this command is to be used for creating molded parts – parts that are manufactured using an injection molding or metal casting process. Such parts usually have faces that are slightly angled, to make removal of the┬ápart from the mold easier. In these cases, the draft is usually applied to a selection of several faces, most often all of the side faces of the design.

However, this command can also be used as a general modeling command for creating individual angled faces.

Using Draft to model a simple molded part

In this example, draft can be used to add draft to a part so that it can be easily removed from a mold. The following image is the original part:

Draft CommandInvoke the Draft command. The first input this command requests is a neutral plane. This selection serves two purposes: It specifies the plane around which faces are drafted, and it also specifies the pull direction. That is, the direction in which the mold is removed from the part, after the molding process is complete. The second input is the faces to be drafted.

In this example, the user has selected all of the vertical faces as draft faces:

Draft CommandNext, you would drag, or enter a precise value into the draft angle entry box. In the following image, the draft angle has been set to an unusually high value, to more clearly show the effect of the draft operation.

Draft CommandFinally, you OK the command to apply the draft to the model:

Draft CommandUsing Draft to model a part that is to be manufactured with a split mold

Sometimes, mold designers use a two-piece mold, which splits in the middle, to remove the part after cooling. Using the same example as previously, this time the user picks the plane shown in the following image as the neutral plane:

Draft CommandThis selection indicates that the mold will be split along this plane. The vertical planes are selected as faces to draft:

Draft CommandNext, you specify that this is a symmetric draft. Use the Draft Type glyph to specify this type of draft:

Draft CommandDrag or enter a draft angle. The result shows that the model has been split along the neutral plane, and the draft applied symmetrically to both sets of faces:

Draft CommandUsing multiple draft angles

Sometimes you may want to perform a draft operation similar to the previous topic, but apply a different angle to faces above the neutral plane than to those below.

You would use the two-way draft type to achieve this. The following example is identical to the previous example. Assuming that you have already picked the neutral plane and faces to draft, the command looks like:

Draft CommandThis time, in the Draft Type glyph menu, select two way.

Draft CommandThis results in two separate angle manipulators and two corresponding angle value entry fields:

Draft CommandThe final result shows two different angles applied to each set of faces:

Using Draft as a general body modification command

In addition to using Draft to add an angle to all vertical faces, for the purposes of easier mold extraction, Draft can be used as a general command to edit a design.

Using the same model as in previous examples, select a neutral plane and four faces to draft:

Draft CommandYou can use Draft to apply a single angle to the faces:

Draft CommandOr, symmetric angles to the faces:

Draft CommandOr, two different angles to the faces:

Draft Command

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