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AFV Painting & Weathering
Answers to questions about the right paint scheme or tips for the right effect.
How to use silicone moulds & resin?
joegrafton
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United Kingdom
Joined: October 04, 2009
KitMaker: 1,209 posts
Armorama: 1,143 posts
Posted: Thursday, November 25, 2010 - 10:06 AM UTC
Hi fellas,
I need a little help, please.
I've recently bought a 2 part silicone for making moulds & a 2 part resin for obtaining a copy of the piece I've made the mould for. Both the silicone & the resin each come in 2 bottles of liquid & I believe have to be mixed to a 1:1 ratio.
I purchased this stuff from Perfect Scale Modellbau in Germany but the instructions on the side of the bottle are in German. And guess what? I dont speak German! Oh dear...
I've emailed Gerold at Perfect Scale Modellbau but I haven't heard back from him yet. So, could anybody enlighten me while I'm waiting? Has anybody used this stuff before & how do I make the moulds & then inject the resin?
Thanks fellas, for any help rendered.
Joe.
jasmils
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Queensland, Australia
Joined: December 23, 2003
KitMaker: 1,016 posts
Armorama: 745 posts
Posted: Thursday, November 25, 2010 - 10:24 AM UTC
http://www.ammsbrisbane.com/newsletter.htm#
Go to August 2009 and see my casting workshop.
The product I use is not from the same place you got yours, but the principals are the same.

Cheers Jason
alanmac
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United Kingdom
Joined: February 25, 2007
KitMaker: 3,033 posts
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Posted: Thursday, November 25, 2010 - 10:26 AM UTC
Hi joe

Armorama has more than just the forum pages. Contained within the site is a wealth of helpful information. Explorer the tabs above to see what gems there are.

Here is one for you, in "FEATURES", all about casting.

Casting

Hope its of help.

Alan
woody6968
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England - North East, United Kingdom
Joined: March 02, 2006
KitMaker: 454 posts
Armorama: 380 posts
Posted: Thursday, November 25, 2010 - 10:26 AM UTC
hi joe
this may not be much help as the first thing i will tell you if your casting resin you should have a de gasser you have to put the moulds in a vaccume to remove the air ,, this also stands when your actually making moulds of the parts to take the air out of the rubber ,, i understand some new resins do not require a vaccume so im hoping you have this resin , althought the rtv rubber may still require it ,, i used to mould make and cast for n and t produtions many moons ago , if you need any help , please dont hesitate i'll do all i can for you ,, good luck
firstcircle
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England - South East, United Kingdom
Joined: November 19, 2008
KitMaker: 2,249 posts
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Posted: Thursday, November 25, 2010 - 11:02 AM UTC
Try this: Nigel Lawton

Articles on bottom of left hand column of site. Entertaing and practical.
joegrafton
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United Kingdom
Joined: October 04, 2009
KitMaker: 1,209 posts
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Posted: Thursday, November 25, 2010 - 07:57 PM UTC
Thanks for all your help, chaps.
I'll check out the links provided & get back with any questions I have. Although, that vacuum sounds a bit of a pain!
Cheers fellas.
Joe.
mmeier
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Nordrhein-Westfalen, Germany
Joined: October 22, 2008
KitMaker: 1,280 posts
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Posted: Thursday, November 25, 2010 - 11:45 PM UTC
Worst case:

+ How long is the instruction sheet? If it's short I could try and translate it
jasmils
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Queensland, Australia
Joined: December 23, 2003
KitMaker: 1,016 posts
Armorama: 745 posts
Posted: Friday, November 26, 2010 - 10:52 AM UTC

Quoted Text

Thanks for all your help, chaps.
I'll check out the links provided & get back with any questions I have. Although, that vacuum sounds a bit of a pain!
Cheers fellas.
Joe.


Joe, you don't need a Vacuum Chamber to do home casting coronary to popular belief. Weather it is to degas rubber or resin. I did this method (see my link) for 18 months commercially without any problems apart from the time factor and a occasional bubbles. And I could still produce parts that would make quite a few customers say "how the hell did you do that".
Most moulds that people make at home are just a straight "drop pour" method and do not require any sort of machinery apart from wrist and elbow work. I had around 400 moulds that I would pour each time. And out of that 400, only 6 were two part moulds.
However, now I use Vac and pressure to do my casting. Only because it is so much faster and easier to do and I can get an even finer resin product out. But it is not cheap to set up.

Cheers Jason
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