modelling injection moulding

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

Thread Tools Search this Thread Display Modes
Old 10 October 2012   #1
modelling injection moulding

I have a yogurt pot to model and I'm not sure how to do it. It's a cup with a lid, the cup is fluted like a cupcake, the lid fits over this and is smooth. I've modelled these bits with splines and loft nurbs, which are then put in hypernurbs and it's all looking good.

I now have to model a flat circular area on the side of the pot that will have a printed sticker applied to it, this circular area will have to be 'pulled' out of the existing model, half of the circular area being pulled out of the lid and half out of the fluted bottom.

What's the best way to do this? Should I project a circle spline onto the mesh to start?
Old 10 October 2012   #2
Can anyone help with this? Got a nice PM with some tutorial links, but still can't seem to get anywhere. Attached is a pic of what I'm trying to model. It's all fine except I need the intersection between the cylinder and the lid and base to be chamfered.
Old 10 October 2012   #3
I appreciate that you're after a solution for C4D but to do this with a proper fillet I'd only consider using a NURBS modeller such as Rhino.
Old 10 October 2012   #4
This is a difficult thing to do if you just started modeling, but doable if you through yourself in.

you need to do poly editing from here on i guess no splines with lofts and so on.

Project a circle spline (with enough spline points) onto your mesh and the i would use this as a visual guide where to cut and subdivide the polymesh to have a clean rounded intersection.

It will be crucial how many subdivisions your circled sticker area will have to fit nicely on the fkutet part.

I guess you will need 2-3 attempts to achieve a clean mesh.
save your file incremental to go pack and do it again if you run into problems.

kind regards mogh
R17 Visualize - Flickr Album - Website
Old 10 October 2012   #5
I tend to agree with Darter. If you want to send me your model as a guide, I could knock you something out of Moi3d and export a polygon version to use in Cinema, shouldn't take long. Mogh's method also works but it's a fiddly build compared to a nurbs solution.
Old 10 October 2012   #6
Sometimes, if I absolutely need an sds version of a model like this, I'll build it in Moi to get it made accurately and retopologise in something like Modo. Much faster than trying to predict where to slice the mesh to get a clean boolean-looking result.
Old 10 October 2012   #7
Thank you so much everyone. Loopcorp, that's a very kind offer. I'm not new to modelling, but I have long gaps between c4d jobs, and so I'm a bit out of practice. I think the client on this occasion will settle for a hard edge where the cylinder comes out of the cupcake and lid. Waiting to hear back from them.

Now I have another question - see my new post!
Old 10 October 2012   #8
ZBrush would also be an option for something like this.
Pros: Quick, clean bevels
Cons: High poly count

Old 10 October 2012   #9
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
Thread Closed share thread

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Society of Digital Artists

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump

All times are GMT. The time now is 05:13 PM.

Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.