Seat casting in resin

28ten

Guv'nor
Simon said:
I just spoke to John Taylor on the phone and he offered to make me a bigger vacuum chamber into which things like coach sides could be put :scratch:



Simon
Now you are talking :thumbs: :laugh:
 

Simon

Flying Squad
28ten said:
[quote=""Simon"":dmc4lo6o]

I just spoke to John Taylor on the phone and he offered to make me a bigger vacuum chamber into which things like coach sides could be put :scratch:



Simon
Now you are talking :thumbs: :laugh:[/quote:dmc4lo6o]

Oh yes, I'm good at that :lol: :lol:
 
S

Simon Dunkley

Guest
Simon said:
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:
:shit:
 

Simon

Flying Squad
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:
:shit:[/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:
 
S

Simon Dunkley

Guest
Simon said:
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.
It depends on what you mean by "a lot" of money, and how much you value your time, and how much of it is just fitted in between other things and therefore inconsequential: entirely up to you, but based on a friend's experiences and attempting to adjust for size, I would have thought a batch of 50 might cost in the region of ?50-?100, but I could be way out either way!
I am definitely NOT offering these outside of the small group here.
Fair enough - you have enough to do already. Better hope the group does not get bigger!

Simon
 

28ten

Guv'nor
If Simon is getting snowed under, There is a place fairly near to me (Cammet - who also make the hold and fold) who do resin casting. if there is a large quantity they may be able to a batch, although this would cost more it might be an option if done as a group.
 

Simon

Flying Squad
28ten said:
Is this the same Colin Binnie who used to work at Thorn EMI in Wells in the seventies?

Yes that's Colin.

Here is a link to a super Dudley Hubbard picture of Colin in his workshop:

http://www.dudleys-photos.co.uk/p46151420.html

His son Peter is still running Binnie Engineering and has recently moved to Mid Wales with his wife and workshop. He was telling me at Llanfair that he is still waiting for electricians and builders, and that the local tradesmen have been politely reminding him that he moved to Wales to get away from hustle and bustle and not to be in too much of a hurry over things :laugh:

Peter has lot of Colin in him, which includes a similar sense of humour :thumbs:
 

lancer1027

Western Thunderer
Hi Simon
Hows the seat casting coming on :thumbs:. Just thought i,d ask as i will need to place another order for some 1st class seats :eek: Yep i've used the first lot on my Mk1 FK and CK , 14 each 28 in total plus those already in the Mk2 BFK.
I understand you are very busy so no probs if its going to be a while yet :thumbs:

Cheers Rob :wave:
 

Simon

Flying Squad
lancer1027 said:
Hi Simon
Hows the seat casting coming on :thumbs:. Just thought i,d ask as i will need to place another order for some 1st class seats :eek: Yep i've used the first lot on my Mk1 FK and CK , 14 each 28 in total plus those already in the Mk2 BFK.
I understand you are very busy so no probs if its going to be a while yet :thumbs:

Cheers Rob :wave:

Hi Rob

I will get on to it, I have actually made a second 2nd class double mould in anticipation of the huge quantities required :eek:

I will have a go soon as I have now got a complete of moulds for GW dooplates to try out - "tickets" "porters" and (best of all) "stationmaster"

Well done on using the first class seats, any pictures of them fitted? (sorry!)
 

Simon

Flying Squad
Finally back on to a bit of resin casting last night, I have cast a few second class seats, (both single and double) and I think the results are OK.

I am not getting the far ends of the armrests coming out though, this might improve with a bit of poking in the resin but might not. I'll post a picture of the results shortly.

I wouldn't have though this would notice inside a coach though and you could always superglue little bits of plastikard to the ends if it bothered you.

Simon
 

lancer1027

Western Thunderer
Hi Simon, thats exellent news :thumbs: Yes i wondered about the endrests but not a problem if it doesnt work, as you have suggested i can use plastikard :thumbs:
Oh and by the way the book " Hydraulics in the West " is exellent :drool: :drool:

Cheers Rob :wave:
 

Phill Dyson

Western Thunderer
Looking forward to seeing some pics  :thumbs:... :scratch: BTW I'm still in the market for 224 double seats Simon  ;D

Cheers Phill  :wave:
 
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