How do i form a mold around an .obj in fusion? or is this possible?

[malsisalaam]

SO im creating a piece to fit onto a 3d printed mask. Essentially, where the filter portion portrudes on the outside, i'd like to create something in fusion to snug fit around that portion, but i cant figure out how to create a shape that will match it. I have the .obj of the mask, but i didnt create it myself so i dont know how i can trace or mold the proportions correctly in fusion. 

[jhackney1972]

Please attach the Fusion 360 file, if you have one with the .obj file in it or please zip up your .obj file and attach it so the forum users can take a look.

[malsisalaam]

Okay sorry, i didnt think it'd be neccessary to send the object. I was half expecting someone to say it isnt possible, otherwise someone saying Just use the X tool. Like either something super simple that i just wasnt understanding, or that it wasnt possible.

So I already took the mask into meshmixer and split the part that i want to fit something over from the rest of the mask. here is the fusion save of that section that has been brep'd. 

If it helps, my end goal is to add basically a cap on attatchment which will hold a small arduino, rgb leds, and a small mic. The mic will react to the voice coming from inside the mask, and cause the leds to light up in a repeating fassion until i stop talking. Not complex, but maybe more difficult to pull off than im thinking. We'll see, but it seems like the hardest part, in terms of me having no idea how to do it, is ending up being how to shape a pull on pull of 'cap' that will fit on the mast mold.

[malsisalaam]

sorry i thought i uploaded it in the previous reply but i dont see it. 

[jhackney1972 · Accepted solution]

I really do not know exactly where to go with this.  I have created a block (yellow) that fits to the body you supplied me, at the position is is now.  Your body is taper and I just chose a location to mold against.  One thing I did that will aid you moving forward, whatever that direction is, is that I made your body solid.  The one you supplied me was a surface.  This means it can be used with other solid commands such as Combine which I used to cut the shape out of the block.  I have attached my model, give me more direction and I will be glad to try and help if needed.

[malsisalaam]

Given that my major issue was that i tried to do exactly what you did in terms of being able to combine them and extrude and it didnt work, the problem was i didnt know i had a surface and needed to convert to a solid object. I'm trying to find in your process where you did that, it looks like its the BoundaryFill in history, but im not certain. What you did is exactly what I was aiming to do, but before i close it I would like to try to recreate what you did myself. Thank you very much. If you would like, i'd also show u what i was going to do with it when i finish if this is still possible for me to reply to by then.

[malsisalaam]

Okay. I am just about to the point where i can, "take it from here". 

I'll provide photos of where i'm at. I didn't exactly do what you did, but your steps created a method for me to understand how things work better.


The pink is just a left over mesh from the original end piece to the mask, this is where the filter will lay in. The gray, obviously, is the cap i was meaning to create. It perfectly fits around the shape of the mask nose (with some spacing for tolerance) I aim to just push this cap ON or pull it OFF for ease of use. (Of course, inside the cap there will me more holes when i get to that part so that air can come through, but also there will be little ports for leds too.) I'm currently printing just the shell to make sure it fits snug and can be pulled back off before i continue with the intricate design inside the cap. As I will just uniform scale until it fits more snug later.

Now here is my new problem not knowing how to fix...



There is now a GAP between between what i want to be the BACK of the cap, and the shell shape of the cap. I cant figure out a way to easily just fill that in and make it so that theres no longer a gap. Just a cap/lid that will fit. When i reach that point I believe i am set to go on designing the holes for leds and breathing which im pretty sure i can already do considering past projects. As it is now, it obviously would print two parts which wouldnt do me any good for the use of the lid/cap fitting onto the mask. I have to somehow mesh the two together. Stitching doesnt work it seems because they are already 2 bodies. scaling up gives me trouble because the center point is not there for this part. I am not aware of a fill from one point to the other or fill gaps technique. I will supply the project file too. Just ... please ignore the history which will show how painfully noobish i am at getting where i was. I know theres an easier way, but at the moment im focused on figuring out ANY way to complete the cap. 

Thank you =] 

[jhackney1972 · Accepted solution]

i could just file the gap for you and attach the model, which I did.  You lamented that you had a hard time figuring out my process before so I did a Screencast to show you this process, hopefully, it helps you quickly understand.  If you are satisfied with the solution to your forum question, please pick the Accept Solution icon to allow others to find the solution to similar issues plus remove it from the board as an open issue.