A simple CORE from imported geometry.

Imported geometry to be a source for the core.

Sometimes you receive a file in the mail, and a request to do something about it. It could be changes that needs to be done, or to engineer some other geometry based from this imported model. Fusion has some really neat features when it comes to direct editing of imported geometry, but that is not the scope of this blog post.

I am going to show you how simple it is to build a core for either a vacuum forming session or an injection mold.

Step1. Create an interior shell.

Turn it upside down and select OFFSET.

In the Patch workspace, where we work with surfaces, use the offset tool to create an offset surface from the inside of the model. But we are not going offset it any distance. Accept 0,00 mm as the offset value.

All inner surfaces selected and shown in blue.
Result of offset operation.

Result after accepting 0 offset and then hiding the original solid part. This is now a thin shell with a zero thickness. It is just a surface.

Step 2. Close it up.

Create a line between these two corners.

Open the line tool and sketch on any plane. Make sure the 3D Sketch option is checked. Then click and drag a line between these two corners.

Step 3. Patch up the holes.

Open the patch tool and select the lines around the front end. Accept and a new surface automagically appears.

Do it again.

We have now created a set of surfaces. These do not yet belong to a single body, but are separate from each other.

Step 4. Stitch ’em up!

Simple command. It does what it says.

The stitch command will take a selection of surfaces and stitch them all into a solid watertight body.

Result: A solid.

The inside of the model turned into a solid.
With source model UnHided.

What next?

Depends on what you want to do. A Vacuum forming operation. Just extrude the bottom face down and you have your core.

A Injection mold? Create the parts by making a bottom body below and follow this guide again on the upper surface of this source model to create two halves of a mold. See the following example:

Example of mold halves.

Design found on GrabCad. Thanx to Chris Luizzi.