+x

 

benji82 - 10/31/2020 9:15:07 AM

I have made a few moulds with this system and use them repeatedly in my autoclave. I ended up putting one gel down then going on with the full layup and then vac bagging. With the gel, I kept an eye on it and waited until it didn't come off on a gloved finger but still quite soft. My theory was that the wetter the gel, the better the bond between that and the resin. I warmed it up and put it down in a hot room which made thing easier. With it only being one gel, the carbon was just about visible but they seem to perform pretty well. Also, a rep from a resin company told me to give the mould a bit of heat before demoulding just to take the brittleness away. I gave it 60°c for 4-5 hours. 
All my moulds have been laid up with carbon but would like to experiment with chopped strand glass. I did buy some powder bound glass but the epoxy didn't break the binder down AT All! I'm wondering if I got sent some emulsion bound by mistake. 
I hope there might be something useful in there for someone. 

+x

 

K.C.C - 10/31/2020 9:41:26 AM

+x

 

benji82 - 10/31/2020 9:15:07 AM

I have made a few moulds with this system and use them repeatedly in my autoclave. I ended up putting one gel down then going on with the full layup and then vac bagging. With the gel, I kept an eye on it and waited until it didn't come off on a gloved finger but still quite soft. My theory was that the wetter the gel, the better the bond between that and the resin. I warmed it up and put it down in a hot room which made thing easier. With it only being one gel, the carbon was just about visible but they seem to perform pretty well. Also, a rep from a resin company told me to give the mould a bit of heat before demoulding just to take the brittleness away. I gave it 60°c for 4-5 hours. 
All my moulds have been laid up with carbon but would like to experiment with chopped strand glass. I did buy some powder bound glass but the epoxy didn't break the binder down AT All! I'm wondering if I got sent some emulsion bound by mistake. 
I hope there might be something useful in there for someone. 

like you said but I had the second gelcoat down when it wouldn't stick to the glove when touching lightly when putting some pressure I could get the gel to stick to my gloves even pull it off the part . 
Like on the tech info of EG160 High Temp Epoxy Tooling Gelcoat I wait no longer tahn 1H30min for secont layer of gel 

I just demoulded a new part with 2 layers gelcoat , even trimmed it before demoulding no problems anymore but the part was laying for 5 days in a room that was 20°C

Chopped strand galss just wont work no powder or no emulsion I see ppl do it on parts that are almost flat sheets but on complex parts it wont work simple as that
Powder is special made to wet it out with resin and when wet placing the layers in ex swimming pools .
For big flat parts its great to work with, its fast and little more stiff than emulsion bound .
On complex parts emuslion every time .
And on Epoxy parts Woven Glass Cloth , carbon cloth or epoxy moulding paste. 

+x

 

benji82 - 10/31/2020 10:16:43 AM

+x

 

K.C.C - 10/31/2020 9:41:26 AM

+x

 

benji82 - 10/31/2020 9:15:07 AM

I have made a few moulds with this system and use them repeatedly in my autoclave. I ended up putting one gel down then going on with the full layup and then vac bagging. With the gel, I kept an eye on it and waited until it didn't come off on a gloved finger but still quite soft. My theory was that the wetter the gel, the better the bond between that and the resin. I warmed it up and put it down in a hot room which made thing easier. With it only being one gel, the carbon was just about visible but they seem to perform pretty well. Also, a rep from a resin company told me to give the mould a bit of heat before demoulding just to take the brittleness away. I gave it 60°c for 4-5 hours. 
All my moulds have been laid up with carbon but would like to experiment with chopped strand glass. I did buy some powder bound glass but the epoxy didn't break the binder down AT All! I'm wondering if I got sent some emulsion bound by mistake. 
I hope there might be something useful in there for someone. 

like you said but I had the second gelcoat down when it wouldn't stick to the glove when touching lightly when putting some pressure I could get the gel to stick to my gloves even pull it off the part . 
Like on the tech info of EG160 High Temp Epoxy Tooling Gelcoat I wait no longer tahn 1H30min for secont layer of gel 

I just demoulded a new part with 2 layers gelcoat , even trimmed it before demoulding no problems anymore but the part was laying for 5 days in a room that was 20°C

Chopped strand galss just wont work no powder or no emulsion I see ppl do it on parts that are almost flat sheets but on complex parts it wont work simple as that
Powder is special made to wet it out with resin and when wet placing the layers in ex swimming pools .
For big flat parts its great to work with, its fast and little more stiff than emulsion bound .
On complex parts emuslion every time .
And on Epoxy parts Woven Glass Cloth , carbon cloth or epoxy moulding paste. 

Yeah, this is what I was finding but worrying that it was just me. 
Also, my moulds have gone a bit brown. I haven't had any problems with this and I'm just putting it down to the temperature cycles. Even high temp prepreg F1 moulds brown a bit after a lot of use or seeing high temp. I think its just an epoxy thing.
I have also used the EL160 to infuse a mould. It seemed to work perfectly until I post cured it. I don't think the fusion fix spray likes the heat. At some point in the future I would like to try using the gel coat again. I can wait until it goes tacky and then use this to position the dry carbon.