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I want to use 2mm Lantor Soric for building a model boat and I want to place the infusion spiral in the middle of the part. Do I need to cut the Lantor Soric in halves just below the infusion spiral or will the resin flow through it?
On all videos I have seen, the resin starts flowing from the edge, but I am not sure if I can put the spiral on top.
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+x+xä You have to understand that the resin will only flow as fast as the slowest point, it cant speed up.
exacly. And the slowest point was obviously the soric, otherwise the resin would not have been pushed from the feed line to the soric, to a point where you can easily lift the bag. A good flow media has a low resistance for the resin to flow through. This means, if you think about it, that the pressure difference between the flow front (zero pressure) and the feed line (full pressure) will be transfered smother, resulting in an more even pressure over the part surface during the infusion. A bad flow media (wich I think soric is) will even out the pressure less good, resulting in a sharp pressure gradient behind the resin front, and a larger area of high pressure behind. And this is exactly what you can see in mat's video. He could easily lift the bag around the feed line and a good way up the soric. This shows, that there must be a high pressure area in the resin, which obviously means, that the connection from feed line to the soric was not the problem, as the soric had more than enough resin to feed from, but was unable to transfer it to the resin front. Keep in mind that mat could not lift the bag (that easy) near the resin front. So there is clearly a steep pressure gradient over the soric area (low pressure at the resin front, high pressure down the first third of the soric area), and almost no pressure gradient from the feed line to the soric (both high pressure). If you think about it as resistors in line, and you measure the current over both resistors, your result will tell you, that the second resistor (soric) is much greater than the first one (feed line to soric).
Wich kind of soric did you use exactly? I used sf and lex in 3mm and 1.5mm.
From my experience an hour seems very fast for that setup (although I would prefer it much quicker, around 25min)
The drag car body I did used 2mm SF. I've just recreated a similar test to the one that Mat did; 2mm SF Soric around 30x10cm. One layer of 450g biaxial fibreglass on either side of the Soric. With the feed line positioned directly over the Soric, the infusion completed in around 5 minutes. With the feed line placed off the Soric like Mat had it, the infusion didn't finish before the resin gelled (around 90 minutes).
Soric is a good flow media, it works just fine when setup correctly. As I said before, there are differences between using an internal flow medium like Soric and an external flow mesh, and you need to account for those differences in your setup. If you do, then it works perfectly. If you don't, then it can go wrong. It's simple though, your resin feed must always be placed over whatever flow medium you are using, whether it is mesh or Soric or PET Core or anything else - the resin inlet needs to be in direct contact or you choke the flow.
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