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Old 01-07-2018, 08:35 AM   #11
Hanaldo

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Originally Posted by jjcomposites View Post
What shelf life do you get with the vinylester? Nice work.
Quoted shelf life is a year, but I keep it in the freezer so I've never had any go off on me.
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Old 01-15-2018, 07:20 AM   #12
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Lovely work altogether!
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Old 01-21-2018, 10:02 PM   #13
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Only the Chevvy and Impala inner guards and the Chev dash have Sunshield as an IMC. Everything else is the raw finish.

I use predominantly a Reichold RTS much like Unimould for tooling, ie. vinyl ester tooling gelcoat and skin coat, filled polyester tooling resin. It is hard wearing but still polishes very well, so it is easy to maintain.

That said, with Easy Composites shift to X-Preg, I have started building epoxy tools as well. This I do with Technirez R2501 as a gelcoat, and R2519 for the reinforcement. I've been playing around with this a bit lately, using the R2519 to produce my own aluminium/carbon filled tooling putty. Took a bit of messing around to work out how to use it without voids everywhere, but I've been getting great results recently, so it's a nice quick and very cheap way to make epoxy moulds.

All the parts I've posted pictures of here are from vinyl ester moulds though.
Youíre information is like gold man. And your work is awesome! I hope to someday be as good as you.

Iím trying to take the next step into prepreg and want to research the r2501 and r2519. I looked them up but not much of how to use them. Can you maybe pm me or post a step by step?

I really kind of wondering if the 2501 can be sprayed just like a poly tooling gel from a tooling gel cup gun and then use the 2519 resin almost like polyester resin and reinforce with some type of fiberglass or carbon?

But you also mention a putty or slurry mix which confuses me. I have watched the easy composite videos on how to make items but thought I would ask since you posted materials!
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Old 01-27-2018, 05:25 PM   #14
Hanaldo

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I don't think the Technirez system will work the way you want it to. The R2501 is actually a casting resin for casting vacuum forming tools, much like the system EC sell for that purpose. It's highly polishable for an epoxy which is why I like it, and it can be brushed on ok, but it is very very thick, I don't think it would spray well even with a huge nozzle on a cup gun. Given it is a casting resin and seeks its own level, it does also tend to sag. You can deal with this when brushing, but for spraying it would be a battle.

The 2519 though is just an epoxy laminating resin, so you can just lay it up with fibreglass or carbon or whatever reinforcement you want to use. Personally, I hate wet laying woven materials, I always struggle with voids. I'm getting better at it now that I've been forced to do it more, but as an alternative I came up with my own recipe for creating a tooling putty using the 2519. This is just a blend of filler powders and fibres, mostly aluminium and chopped/milled carbon fibre, turning the resin into more of a dough. This is really a very quick way of building moulds, so I am going to stick to it for smaller/complex moulds.
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Old 01-27-2018, 06:02 PM   #15
Infused

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Originally Posted by Hanaldo View Post
I don't think the Technirez system will work the way you want it to. The R2501 is actually a casting resin for casting vacuum forming tools, much like the system EC sell for that purpose. It's highly polishable for an epoxy which is why I like it, and it can be brushed on ok, but it is very very thick, I don't think it would spray well even with a huge nozzle on a cup gun. Given it is a casting resin and seeks its own level, it does also tend to sag. You can deal with this when brushing, but for spraying it would be a battle.

The 2519 though is just an epoxy laminating resin, so you can just lay it up with fibreglass or carbon or whatever reinforcement you want to use. Personally, I hate wet laying woven materials, I always struggle with voids. I'm getting better at it now that I've been forced to do it more, but as an alternative I came up with my own recipe for creating a tooling putty using the 2519. This is just a blend of filler powders and fibres, mostly aluminium and chopped/milled carbon fibre, turning the resin into more of a dough. This is really a very quick way of building moulds, so I am going to stick to it for smaller/complex moulds.
Cool man thanks.

Iím going to be working on a new mold and really itís my first critical one where I need things to not shrink. Iíve been using polyester tooling gel and the polyester low shrinkage ďor so they claimĒ resin I get but wondering what may be better, especially if I want to try some of easy composites ooa prepreg.
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