+x

 

beliblisk - 11/19/2020 7:25:04 PM

+x

 

Hanaldo - 11/19/2020 12:05:18 AM

No reason why you can't use it, some of those flange shapes are going to make things challenging for you but it's certainly usable. 

You either need to seal the flanges with something before bolting them together, or you will need to envelope bag the entire thing. Envelope bagging I find quite unreliable for infusion due to the propensity for leaks, especially on larger complex moulds like this, so I try to avoid it. for sealing the flanges, the easiest and most reliable way I've found is to use an RTV silicone gasket maker (do NOT use an adhesive caulking silicone, these will bond your flanges together regardless of release agent). The downside is this is a bit difficult to clean up after the infusion, so it becomes a bit of a pain to reuse the moulds. Another way I do it is to run a 'bead' of gelcoat all around the flanges, and then bolt the flanges together before the gelcoat cures. This is significantly easier to clean up, but doesn't seal as reliably as the silicone gasket. Using either method, don't forget to seal up your bolt holes as well.

Regarding the sealing mould parts.

Would you say that gum tape in 2mm recess integrated in the flange works better than gelcoat method?

I used RVT silicon befor but as mentioned its a pain to clean so for next multi part tool i was planning to go gum tape route.

thanks a lot

+x

 

Hanaldo - 11/19/2020 9:02:24 PM

+x

 

beliblisk - 11/19/2020 7:25:04 PM

+x

 

Hanaldo - 11/19/2020 12:05:18 AM

No reason why you can't use it, some of those flange shapes are going to make things challenging for you but it's certainly usable. 

You either need to seal the flanges with something before bolting them together, or you will need to envelope bag the entire thing. Envelope bagging I find quite unreliable for infusion due to the propensity for leaks, especially on larger complex moulds like this, so I try to avoid it. for sealing the flanges, the easiest and most reliable way I've found is to use an RTV silicone gasket maker (do NOT use an adhesive caulking silicone, these will bond your flanges together regardless of release agent). The downside is this is a bit difficult to clean up after the infusion, so it becomes a bit of a pain to reuse the moulds. Another way I do it is to run a 'bead' of gelcoat all around the flanges, and then bolt the flanges together before the gelcoat cures. This is significantly easier to clean up, but doesn't seal as reliably as the silicone gasket. Using either method, don't forget to seal up your bolt holes as well.

Regarding the sealing mould parts.

Would you say that gum tape in 2mm recess integrated in the flange works better than gelcoat method?

I used RVT silicon befor but as mentioned its a pain to clean so for next multi part tool i was planning to go gum tape route.

thanks a lot

Tried it, but didn't find it very reliable. The tape tends to compress quite easily, and it often ends up that in some areas it doesn't contact the opposite flange properly and doesn't seal. It also still makes a hell of a mess, its just as hard to clean up as the silicone.