Just wondering if anyone has used Gurit sprint as an alternative to infusion. Apparently good surface finish is possible.
I tend not to use prepregs for surface finish reasons (although I would like to) and also find using a fibreglass mould the coefficient of thermal expansion values are too different. ie as the fibreglass tool expands the carbon will start to bridge in shallow female radius’.
Anyone had the same issues?
Solutions are autoclave and carbon tooling I assume.
Yes, you want a tool that has a low CTE such as a Carbon/epoxy tool. We have sampled Sprint material but did not have good results with it. Lots of surface pits. There are other prepregs available that do give a pit free finish out of autoclave.
I had a short workshop with the stuff, but I work with a similar system from ACG, so I can tell you mora about that. Surface finish is quite good. The fibre is dry, so the fibre ends up in the air quite a lot. Virtually no pinholes, but air trapped between the first ply(carbon/glass) is possible. The ply’s are not that tacky, but if I remember correctly Sprint has one tacky side. Ask some samples, you can test and see if its something for you.