Login |  Register |  FAQ
   
Post new topic Reply to topic  [ 9 posts ] 

Casting from printed models

 Post subject: Casting from printed models
PostPosted: Tue Oct 01, 2013 8:50 pm 
Brood Brother
Brood Brother
User avatar

Joined: Tue Jul 31, 2007 6:28 pm
Posts: 856
Location: UK - Bristol
My first experience of getting a printed model moulded was a disaster.
It turns out that the stuff used to make the moulds does not play nicely with the printed model and it does not cure properly resulting in a cruddy mould.

I am currently getting my printed models cast into resin, then having the resin models used to make the moulds.
This is a costly step in the process I wish to avoid.

I hear that simply scrubbing and washing the printed model then coating in paint will stop this problem.
I assume this seals the model and keeps the stuff on it away from the mould gloop.

Can anyone with experience shed any light on this for me please?

_________________
http://angelbarracks.co.uk/


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Tue Oct 01, 2013 9:17 pm 
Brood Brother
Brood Brother
User avatar

Joined: Fri Aug 02, 2013 3:50 pm
Posts: 2324
It depends what material you used to print the model in. HTM140 is generally good for casting, the printed model could immediately function as a master. RCP30 is also a good material to use.

_________________
Bits Blitz - The place to be for all your bits needs!

http://www.shapeways.com/shops/bitsblitz


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Wed Oct 02, 2013 7:04 am 
Hybrid
Hybrid
User avatar

Joined: Tue Apr 19, 2011 12:03 pm
Posts: 6353
Location: Leicester UK
Also interested, I tried making some siligum moulds of some 3D printed bits the other day and it just went weird....

_________________
NetEA Space Marine, Imperial Fists and Blood Angels Army Champion

NetEA Red Corsairs Army Champion

My hobby/painting threads

Army Forge List Co-ordinator


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Wed Oct 02, 2013 8:02 am 
Brood Brother
Brood Brother
User avatar

Joined: Tue Jul 31, 2007 6:28 pm
Posts: 856
Location: UK - Bristol
Was that for resin casting kyussinchains ?

_________________
http://angelbarracks.co.uk/


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Wed Oct 02, 2013 8:12 am 
Brood Brother
Brood Brother
User avatar

Joined: Thu Mar 13, 2003 3:18 pm
Posts: 1619
Location: France
My resin caster asked me to undercoat my FUD Shapeways models before sending the parts to him.

He had some problems in the past with FUD that was porous and behave badly with silicon.


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Wed Oct 02, 2013 8:33 am 
Hybrid
Hybrid
User avatar

Joined: Tue Apr 19, 2011 12:03 pm
Posts: 6353
Location: Leicester UK
@AB dual purpose, the moulds will work with either resin or metal

I found that the mould halves were distorted and twisted, I'm thinking it's some kind of reaction between the siligum catalyst and the 3D printed material

I may try again, but give the pieces a good scrub in cold soapy water first, and then spray them...

_________________
NetEA Space Marine, Imperial Fists and Blood Angels Army Champion

NetEA Red Corsairs Army Champion

My hobby/painting threads

Army Forge List Co-ordinator


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Wed Oct 02, 2013 8:57 am 
Purestrain
Purestrain
User avatar

Joined: Thu Jul 10, 2008 9:04 pm
Posts: 5961
Location: UK
One problem i've had with stiff RTV was the very rough surface of CAD prints (due to striation) meaning the master had a lot of 'grip' into the mould, led to the master snapping on removal ::) .

_________________
AFK with real life, still checking PMs


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Wed Oct 02, 2013 9:10 am 
Brood Brother
Brood Brother
User avatar

Joined: Tue Jul 31, 2007 6:28 pm
Posts: 856
Location: UK - Bristol
I use shapeways and other companies prints for my resin moulds resin and have no issues at all, it is just with the metal that they moulds don't cure..

The issue I understand is that chemicals used to remove the wax works against the curing process of the mould.

Shapeways is a pig for striation so I always sand their stuff down first.

_________________
http://angelbarracks.co.uk/


Top
 Profile Send private message  
 
 Post subject: Re: Casting from printed models
PostPosted: Sun Oct 06, 2013 9:08 am 
Brood Brother
Brood Brother

Joined: Sat Jun 18, 2011 10:17 am
Posts: 1632
If you don't want the striations you could always contact this gentleman.

http://blackdragoncastings.co.uk/

He's a regular on the resin addict forums ( http://www.resinaddict.com/forum/index.php), he prints his masters in wax pretty much the same way they do jewelry masters. just a thought.


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 


Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  


Powered by phpBB ® Forum Software © phpBB Group
CoDFaction Style by Daniel St. Jules of Gamexe.net