Setting a draft angle on an irregular shape

[cimbian]

Hi,

I have a cup that is of an irregular shape and I'm going to use it as a mould to cast a resin male of the inside.

The cup is at finished size but I need to add a rim around it that tapers outwards by 5 degrees to a height of about 10mm in order to provide an overfill area as well as a draft for the vacuum former.

I've looked at loads of videos and tried lots of tools in Sketch, sculpt and patch but just get confused.

Attached is a screenshot of the cup, as-is, and another indicating the sort of lip that I am looking to add.

My background, as you can tell is not in 3D, rather it is years of CorelDraw.

Any help very gratefully received.

Thanks,

Steve.

[PhilProcarioJr]

@cimbian

Can you share the file it will be easier to show you that way.

[cimbian]

Hi Phil,

Thanks for responding.

I think I may have got there. 🙂

I selected the outer edges and created an offset in Sketch. I then pulled the sketch to the height I needed and applied a chamfer to the inside edge. This actually gave me a small flange, which is useful as well as the draft.

Screenshot attached.

Probably totally the wrong way to do it, though.

Steve.

[PhilProcarioJr · Accepted solution]

@cimbian

It's not the wrong way, there are actually many ways you can do this. Here is another one to get the correct draft.

[cimbian]

Thanks, Phil. Much appreciated.

Steve.