Xencast Flexible Polyurethane Rubber


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TURK
TURK
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Hi all,



I've got a few questions regarding the 'new' product 'XenCast Flexible Polyurethane Rubber' advertised on your website.

Basically I'm making a couple of moulds with the intention of casting 'Vac-Cast Epoxy Resin' into them,  what I need to end up with are two perfectly reproduced tooling plugs for vacuum forming my final parts into ABS plastic.



The following image will hopefully explain in greater detail my procedure.  I've recently used a product from 'Smooth-On' called 'OOMOO 30',  but had a disastrous result.  I must admit,  as good as it seems to be I just hate working with it.  Here's what my original mould box looks like with my plug secured in the base,  I then poured the silicon rubber into the mould box .........  it was an awful lot of work,  trying to mix what was a consistency of partly molten lava,  and the impossibility of pouring made the job needlessly difficult,  the result was a failed pour and a very badly formed mould  !  >>

 



Pouring the mix in a thin stream in a low corner was just impossible,  I almost had to resort to 'trowelling' it in ! >>

 



When I demoulded the following day,  it wasn't too bad,  but strictly speaking an appalling result.  Not something I would want to cast resin into that's for sure .........  I put it down to a good learning experience  >>





Because the silicon rubber wasn't 'fluid' enough,  full coverage of my plug wasn't achieved,  leaving large voids and air pockets  >>

 









So basically,  my question is,  would that 'XenCast flexible Polyurethane rubber'  be an alternative to OOMOO 30  ?

I've been looking at the 'XenCast PX30',  it seems to have the same characteristics as the OOMOO 30  ( both Shore A of 30 ),  how will it react to Vac-Cast Epoxy Resin being poured into it  ?







To further explain my situation my entire procedure is here >  Headlight mounting bracket moulds
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TURK
TURK
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Posts: 101, Visits: 662
Ah, yes,  I'd forgotten about that .................  been a while since I used it.  Thanks Hanaldo  Wink

I'm going to order from EC today.
EG60 Epoxy Tooling Gelcoat
EMP Epoxy Moulding Putty

I think that 10 Kilo's of the putty will be enough for two headlight covers.  D'you know if I can build it up,  a nice few layers like 4cm thick,  is it OK to do that?  Also,  how thick of a gelcoat can I realistically get away with.  The thicker the better!

I'll keep you informed of how it worked mate,  about time I updated my 'Quad Headlight Project' anyway.  No doubt some members will find some of the methods quite interesting >  Quad Headlight Project
The very first picture you see in the link was my very first attempt I did of the dual aperture headlight cover.  I vacuum formed it using a home built vacuum forming machine,  unfortunately I could only vacuum form up to 1mm thick ABS.  I was so impressed by that thermoforming method, and it's potential that  I eventually went out and bought a FormMech vacuum forming machine!  BigGrin



TURK
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