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"DIY 2/3 mm AFV White Metal Casting Questions" Topic


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276 hits since 24 Apr 2017
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Comments or corrections?

ROUWetPatchBehindTheSofa24 Apr 2017 1:54 p.m. PST

Returning to my old 2mm sci-fi project, featuring AFVs constructed from scrap sprue mixed with Irregular's 2mm range and some larger odds and ends, I've decided I want to add to my existing forces. This time I want to try wheels and tracks which will be extremely tedious in from scrap sprue and styrene, so I'm considering trying my hand at sculpting some masters and duplicating them.


So now to the questions – I'm considering casting 'open-topped' at least for those models with a flat base. Anyone able to comment on this and general experience in casting the likely size of miniature – no more than the size of a 15mm head for a tank?
Any advice on the compound to make the mould given the size of miniatures I was just going to use a typical RTV silicon rubber compound?
How much compound, ballpark, am I likely to need for say mould that I can make half-a-dozen miniatures in? 10's of grams or 100's of grams?
And how many casts am I likely to get from a typical home-made RTV silicon mould?

Mako11 Supporting Member of TMP Inactive Member24 Apr 2017 6:23 p.m. PST

Depends upon the size of the mold you are making, and its frame.

I'd say use a commercially available one made of plastic, or some other, small, square of rectangular, waterproof container.

Shouldn't need more than 2 – 4 oz. of silicone. Probably more likely, the smaller amount, if you make the mold small enough.

A small, test sample box that sells for $20 USD – $30 USD here in the USA should work.

I have no idea what that converts to in grams.

GarrisonMiniatures Supporting Member of TMP Inactive Member25 Apr 2017 8:14 a.m. PST

Have you tried a google search on jewelry making web sites?

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