Help With a Model

I’m working on modeling a 2" binding folder that finishes at 1" and I need some help trying to get the fold. I have the basic shape at each end but having trouble trying to figure out how to add the roll or the fold from one in to the other. Any help would be greatly appreciated. Here is the folder I’m trying to replicate.

Attached is my model.
Binding Folder.3dm (110.9 KB)

Thank You,

Hi Veronica - this is possible of course but will take a little work, I would say, to make look like metal. I think I would be inclined to try SubD first here since it is a fairly imprecise form that may take some pushing and pulling to get to look right. Your exising curves are straights and arcs but your image shows far less rigorous geometry.
@theoutside - what do you think?


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hard to tell, I’m having a hard time seeing the forms in those images

would be helpful to have top/front/right/side views to be able to see the forms a bit better

I feel like this is a “make the curves 1st as a network then surface the results once you are happy with the framework” type of gig but subd may be an option as well-

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Hi Pascal and Kyle,
Sorry, I should have mentioned that this model is used to 3D print. I work in a manufacturing facility where we make garments. I’m part of the engineering department and I help with creating work aids and sewing machine accessories using 3D printing. We just recently moved in the 3D printing direction. I was familiar with Rhino before 3D printing come along but I mostly work with the basics, I haven’t really worked with the SubD part… but would be willing to learn more about it. Love working in CAD! Below is some pictures of the folder I’m trying to model to 3d print. It doesn’t have to be in the exact shape, just needs to be able to do the job that the folder does.

Here is a similar folder with a little bit of information about the fold of the fabric

Below is a similar strip folder that I modeled recently and printed


my best suggestion on how to handle this it to make one out of paper.

paper modeling and nurbs modeling are very similar. trimming 4 sided surfaces then joining the edges (tape) is virtually identical to how you’d make this in rhino.

once you have it the way you’d want it, look at the pieces of paper and the shapes they make… the edges are your curves, the sheets of paper themselves are your surfaces.

any time I’m stuck with subd, I make the model out of post it notes…anytime I’m stuck in nurbs, I make it out of paper. That usually shows me the way the patches or surfaces need to be laid out.

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Wow! Great idea Kyle, I hadn’t thought of doing it that way. Will try this.


@veronica.hubbard16 You may be interested in my training services.
I’m an experienced Rhino Trainer since 2005 and I give custom on-line training for both Freelance and Company.

My time zone is CEST (Italy) so if this matched to your location I would like to propose my services to help you getting out the most from this project.

Rhino is a very powerfull tool but is much better to start with the right notions. Being self tought in professional enviroment isn’t the right choice in the long term.


If it was me, i would create a flat surface in Rhino and bend it, play with it untill you get the result you want. Move the gumball, make holes, etc… Very easy, you don’t need a lot of experience for that.