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Other Stuff => Workbench => Topic started by: oldskoolrebel on 04 April 2013, 08:03:15 PM

Title: Mould making (N00b questions)
Post by: oldskoolrebel on 04 April 2013, 08:03:15 PM
Good evening all,

I am going to bite the bullet and try to mould some bits and pieces of terrain. The only issue is the choices and tutorials are abit overwhelming!

Basically i'm planning on casting some bits and pieces of terrain so I can recreate them in plaster. Can anyone recommend a good uk supplier of silicon rubber?

Many thanks
Andy
Title: Re: Mould making (N00b questions)
Post by: sandsmodels on 04 April 2013, 08:26:52 PM
andy
give me an email as i may be able to help
sales@sandsmodels.com
thanks
shaun
Title: Re: Mould making (N00b questions)
Post by: Dewbakuk on 04 April 2013, 08:47:41 PM
Didn't I supply you with links to buy this stuff previously?
Title: Re: Mould making (N00b questions)
Post by: oldskoolrebel on 04 April 2013, 09:02:31 PM
Didn't I supply you with links to buy this stuff previously?

Hey Dean, In this thread http://leadadventureforum.com/index.php?topic=37426.15 (on ipad clicky links damn difficult to set up) you advised me on plaster choice  8). Unless i've missed it (which I probably have) we didn't discuss rubber.

Incidently I decided to ditch the vinamould, after your advice, seems like deadly stuff.

andy
give me an email as i may be able to help
sales@sandsmodels.com
thanks
shaun

Will do shaun!

Cheerd
Andy
Title: Re: Mould making (N00b questions)
Post by: Dewbakuk on 04 April 2013, 09:21:17 PM
Ah fair enough :)

I'm sure Shaun can sort you out. I bought my last batch from Tiranti.
Title: Re: Mould making (N00b questions)
Post by: OSHIROmodels on 04 April 2013, 10:39:27 PM
I bought my last batch from Tiranti.

So that's why you re-mortgaged  lol

Get mine from Notcutts as they are 15mins down the road and have a couple of shelves of differing material samples which is useful.

cheers

James
Title: Re: Mould making (N00b questions)
Post by: Dewbakuk on 04 April 2013, 10:45:54 PM
So that's why you re-mortgaged  lol


Yeah, and to be honest I wasn't that impressed by the product. I've certainly used better.

Get mine from Notcutts as they are 15mins down the road and have a couple of shelves of differing material samples which is useful.


That's useful to someone in Scotland isn't it  ::)

Unless of course they'll be down for Salute in a couple of weeks.
Title: Re: Mould making (N00b questions)
Post by: OSHIROmodels on 04 April 2013, 10:50:13 PM
That's useful to someone in Scotland isn't it  ::)

They do post...  ::)

 ;D

cheers

James
Title: Re: Mould making (N00b questions)
Post by: oldskoolrebel on 05 April 2013, 12:01:39 AM
They do post...  ::)

 ;D

cheers

James

Cheers Jimmybibittybobbity, I'd actually considered attended salute... Very briefly. I'm afraid that I cannot justify attending as I've not been gaming recently; heck tonight was the first time I picked up a paint brush in several months.

I shall ofcourse give them a wee look.


Cheers
Andy
Title: Re: Mould making (N00b questions)
Post by: OSHIROmodels on 05 April 2013, 12:14:39 AM
Good to see you back anyway Andy  :)

cheers

James
Title: Re: Mould making (N00b questions)
Post by: MODman on 05 April 2013, 06:28:48 AM
if you want the best that is a pure joy to work with use tiranti t20 silicone rubber £18 plus vat per 1kg tin, however EA silicone http://www.ea-silicones.co.uk/rtv_silicone.html do 1kg for £11 and they even offer a code to get a further 10% of the cost, the silicone is not so good quality but we are talking one lasting forever and a day using plaster and the other only lasting forever.
or should i say that tiranti is captain scarlett and ea is captain black if that helps, both companies have next day deliveries and their service is about equal in that respect.
Title: Re: Mould making (N00b questions)
Post by: oldskoolrebel on 05 April 2013, 01:53:53 PM
Good to see you back anyway Andy  :)

cheers

James

Thanks Jim!


if you want the best that is a pure joy to work with use tiranti t20 silicone rubber £18 plus vat per 1kg tin, however EA silicone http://www.ea-silicones.co.uk/rtv_silicone.html do 1kg for £11 and they even offer a code to get a further 10% of the cost, the silicone is not so good quality but we are talking one lasting forever and a day using plaster and the other only lasting forever.
or should i say that tiranti is captain scarlett and ea is captain black if that helps, both companies have next day deliveries and their service is about equal in that respect.

One quick question; what shore should I be looking to use? Any experience?

Cheers
Andy
Title: Re: Mould making (N00b questions)
Post by: MODman on 07 April 2013, 03:37:01 PM
go soft
Title: Re: Mould making (N00b questions)
Post by: oldskoolrebel on 10 April 2013, 05:13:57 PM
Thanks! I've ordered 2kgs from ea- they may not be the Rolls Royce of Silicon- but I'm pretty sure that I'm going to ruin the first couple of moulds anyway!

So what else do I need? Lego?

Cheers
Andy
Title: Re: Mould making (N00b questions)
Post by: Dewbakuk on 10 April 2013, 07:49:03 PM
I use lego with cellotape around the inside to make sure nothing leaks. Gives you nice exact corners and can be made into any shape you wish and then reused as often as you want. If you don't have any then it's not necessary, anything non porous will do if you can hold the shape. It's more important to make sure it has a flat base if it's to be used for plaster casting. A tupaware container would make a good mould box for test moulds.

Other than that, just make sure you have a decent amount of rubber around the item so that when the plaster is poured in, the weight of it doesn't distort the mould. The bigger the piece the more rubber needed around it. Or you can stick it back in the tupaware tub to make sure it retains the shape during casting :)
Title: Re: Mould making (N00b questions)
Post by: purbrookmodels on 10 April 2013, 08:25:13 PM
I have just used http://www.easycomposites.co.uk/Products/silicone-mould-resin-casting-starter-kit.aspx
really clean, no smells easy to use.

Matt
Title: Re: Mould making (N00b questions)
Post by: jthomlin on 11 April 2013, 04:51:14 AM
Thanks! I've ordered 2kgs from ea- they may not be the Rolls Royce of Silicon- but I'm pretty sure that I'm going to ruin the first couple of moulds anyway!

So what else do I need? Lego?

Cheers
Andy

In my experience the silicon rubber can still find it's way through Lego unless you seal it with modelling clay or similar.

A simple and relatively quick way is to use a clay (like 'Klean Klay') to build the walls themselves. Flatten out the clay with a rolling pin until ~5-8mm thick, cut strips to the desired height and wrap around to form the wall. If you need more than one strip, it's just clay, massage the two pieces together and sealing it is easy as you just press the edges with a suitable tool like those rubber 'paint shapers' to seal the gaps. When finished, mash it all back into a ball ready for next time. The same clay can also be used for the other half of a two part mould.

Cheers!
Joe Thomlinson
Title: Re: Mould making (N00b questions)
Post by: Dewbakuk on 11 April 2013, 07:57:35 AM
In my experience the silicon rubber can still find it's way through Lego unless you seal it with modelling clay or similar.


That's why I run some cellotape around the inside before I pour.