Simon Dunkley said:
[quote=""Simon"":5xhmi59t]
I'm not going to ask what the total requirements for everyone's 2nd class seats are because the answer will be frighteningly high :shock: .
Simon,
I don't want to stop you having fun, but with these quantities, would it not make more sense for this to be commercially cast by injection moulding of the resin by someone lime CMA Mouldform?
Incidentally, they require all submitted patterns to be painted in grey primer, to seal any small gaps: might be a useful tip.
And for those without a vacuum degasser, you can plan your mould on top of a washing machine on spin-dry cycle, which will vibrate the bubbles out. However, if you do this you must tape the mould-box securely down, or it will "walk" with the vibrations and spill down the wall. In true Colin Binnie style, I managed this with a silicon rubber intended for whitemetal casting, which is a fairly strong red: leaves a nasty stain on the wall...
We have an icon for what happened when SWMBO came home:
[/quote:5xhmi59t]
Yes, but it would cost a lot of money!
This is more of an interesting experiment/favour for fellow Blunderers type activity. Either way, I'm not sure the production of 100 plus things is going to be "fun" exactly, but I'll give it a go, in between other jobs etc.
I am definitely NOT offering these outside of the small group here.
Bubblewise, the vibrating thing is a good idea although only a vacuum will pull bubbles out of those really awkward places. Nearly all of my resin casting to date has been done without the benefit of either. Primerwise, CMA may well specify that, it is all to do with the surface finish, the rubber will pick up absolutely every surface imperfection and variation, right down to the slightly smoother finish you get where solvent has spread around a joint. Gap sealing is really down to the design of the pattern, if you look at the beginning of this thread you will see (I think) my comments re gaps under the seat squabs on the 1st class seats causing a problem.
Its a fascinating process to get involved with, I haven't ever got it 100% right (yet!)
I knew Colin Binnie, one of my favourite people and very much missed :cry: