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Bridging and Soric print through (Advice needed)
Bridging and Soric print through (Advice needed)
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Bridging and Soric print through (Advice needed)
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faleh
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faleh
posted 7 Years Ago
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Hello everyone!
I recently posted a topic regarding a bridging issue we were experiencing with an infused carbon fiber part (
http://www.talkcomposites.com/25379/Carbon-Fiber-Lifting-Off-Mould).
Hanaldo gave some great advice and suggested that we work on positioning the bag more effectively before achieving a complete vacuum. So we worked on that and performed another infusion with 3 layers or 200gsm carbon and 2 layers of soric in between. We pulled the vacuum slowly, positioning the bag, and pressing the layers firmly into the corner of the mold. The end result was a substantial improvement. However, some bridging persists. Please refer to the photos attached below. Additionally, we also have a new issue: The soric is printing through the carbon quite a bit. I believe this might have been a curing issue as the temperature might have been too low. I should mention that we are allowing the vacuum to run for several hours after the part has been infused. This has not created an issue for us in previous parts but might be something for us to consider.
Any suggestions on how to completely eliminate the bridging issue and the soric print through are much appreciated.
***Photo of bagging during infusion:
***Photo of Bridging:
***Photo of Soric print through:
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Bridging and Soric print through (Advice needed)
faleh
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7 Years Ago
That is quite extreme print through. Looks like you need lots more resin and still pay more attention to getting the material into those corners. it should be possible to get that shape part to have ...
Warren (Staff)
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7 Years Ago
Yeh, as Warren said. That looks very lean, and still a bit bridged. Are you using a surface tack at all? It will reduce your surface finish quality, but it may help you position things a bit easier.....
Hanaldo
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7 Years Ago
Did you clamp down both hoses, after you turn off the vacuum? As there is an area with almost no printthrough, it looks to me, as if air entered the bag in the green stage of the resin. This could...
oekmont
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7 Years Ago
Thanks a lot for all the feedback! As Warren pointed out, it was rather cold when this part was curing and the resin was slightly tacky when we demoulded. This was very likely the reason for the...
faleh
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7 Years Ago
In my opinion, not clamping the vacuum line should have caused most of the problem. On the picture, I could identify a spot with far less print trough. By just demoulding to early, the print through....
oekmont
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7 Years Ago
Yeh, I agree with both of oekmonts points. Your issues with bridging are definitely stemming from how you are laying up, that is far too rigid a laminate stack to get enough movement with all the.....
Hanaldo
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7 Years Ago
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