# Create new part within the void of another part (mold)

**URL:** <https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833>\
**Category:** Modeling Questions\
**Created:** [August 9, 2022, 4:09pm UTC](https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833 "2022-08-09T16:09:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![lprevost](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@lprevost](https://discourse.shapr3d.com/u/lprevost)\
**Post date:** [August 9, 2022, 4:09pm UTC](https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833/1 "2022-08-09T16:09:51Z")

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I’m trying to create a new part within the void of an existing part. I’ve got a simple 2" PVC pipe with threaded ends and a threaded cap. I’m trying to create a new part that slides into the void of the pipe which I can then additionally model with some other features?

Here is the pipe.

Question? How do I use the pipe to “mold” my new part?

 ![Pipe cross section](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/e/0ee1ea7c866fa13c4e6e6bc36a4fa9e6f6618505.jpeg)

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**Author:** ![McD](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/mcd/32/15504_2.png) [@McD](https://discourse.shapr3d.com/u/McD)\
**Post date:** [August 9, 2022, 4:38pm UTC](https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833/2 "2022-08-09T16:38:23Z")

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Here’s a way. Create a plane at the end of the pipe. Then draw a circle on that plane, equal to, or slightly smaller in diameter than your pipe. Then extrude the new pipe.

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**Author:** ![lprevost](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@lprevost](https://discourse.shapr3d.com/u/lprevost)\
**Post date:** [August 10, 2022, 11:31am UTC](https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833/4 "2022-08-10T11:31:29Z")

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Thanks. That does make a new inner piece. But the top face doesn’t match the inside top of the pipe face formed by the cap and pipe. Thanks for trying to help me.

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**Author:** ![lprevost](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@lprevost](https://discourse.shapr3d.com/u/lprevost)\
**Post date:** [August 10, 2022, 11:33am UTC](https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833/5 "2022-08-10T11:33:12Z")

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@SteSchmi thanks. Now this is something new I haven’t tried yet. I’ll give it a try and report back

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**Author:** ![lprevost](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@lprevost](https://discourse.shapr3d.com/u/lprevost)\
**Post date:** [August 10, 2022, 2:10pm UTC](https://discourse.shapr3d.com/t/create-new-part-within-the-void-of-another-part-mold/20833/6 "2022-08-10T14:10:05Z")

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Much thanks. That worked!

I was trying to extrude from the plane and do the subtraction all at once from the Boolean choice menu. When I finally extruded to a new body and then did the subtract operation, things started happening. Thanks for getting me back on track.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/7/f768bef6a99f585c38e2f9dea3db465951eccba3.jpeg)