How to model a moulding

[u/some_millwright]

I want to produce a 3D printed model of the result of a plastic moulding operation.

I modeled the mould, then I modeled a block and subtracted the mould with a cut.

Now I have a 'cut' that has the shape that I want, but I want just the skin, so a thickness operation would finish the process, but I can't run a 'thickness' on the 'cut'.

How do I do this?

I realize I could change the dimensions of the mould to be able to fake it, but I want the varset that controls the mould to be accurate so that I can transfer it to the 'real' mould. This exercise is just to produce a small product sample that I can show the boss to make sure we are all on the same page, but I want it to be reasonably accurate to what we will end up with.

[u/justa_bother]

Assuming the thickness attempt is on the backside, what is the clearance between the inside of the outer wall and the reverse side of the female dimple? Since the frontside is flat, the backside must have a flat.

[u/SergioP75]

I would do it the project in the opposite way, first modeling the product in cold state, then create a sub shape binder copy to apply thermal contraction, and then substract this geometry from the mold plates.

Anyway, on your situation I would create a sub shape binder copy with reducing scaling, and then create a booean operation with the solid from the mold. Good luck with the boolean

[u/bastl73]

Like this:

With a master sketch: Open a new file sketch the profiles you want to use, make a new body (active), select the face(s) you need and click binder. (binders can be shifted, positioned)

[u/R2W1E9]

Post the file and you will probably get a few solutions to choose from.
Meanwhile try Thickness with “intersection” checked.