by Gijs, published
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I put an extra nut between the nozzle and the aluminium to overcome Â the warmth issue. Works great. This is one of the best designs. I tried the more direct nozzles but this one has the most air flow.
Maybe some airflow could be directed closer to the screws. For example thing:17602 (which is basically the original folded fanduct made with PLA, and very thin) has the screws even inside the airflow, which I guess cools the aluminium. It also has a smaller area of contact. However it doesn't push as much air through as your design.
Yes, I think that will happen with all pieces that rest against the aluminium, since PLA weakenst at around 50C. Now I think of it, a nylon spacer might just be enough to prevent that. But since you have a HPB, better print a couple in ABS
I've ordered some radial fans to experiment with cooling the aluminium, that will help as well. And then make a fan duct that cools both the alu and print at the same time
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I tried one of the fanducts that cool around the nozzle, but found they did not displace enough air. This design has an even more tilted fan placement, which should result in better efficiency.
It may look as if the duct blows on the nozzle, but this is not the case.
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