XC110 and EB700, first use, not so great results, not sure what went wrong.

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XC110 and EB700, first use, not so great results, not sure what went wrong.

Author	Message
carguy84	c carguy84 posted 3 Years Ago HOT Topic Details
c Group: Forum Members Posts: 6, Visits: 176	Not sure what went wrong with this. It’s two ply of the XC110 on an EB700 board that’s been CNCd, sanded and sealed with 120. EB700 machines excellent, BTW. I used FibRelease on the surface of the mold and cured it in the curing oven with the ramp to 70c, hold for 4 hours, ramp to 120 and held that for about 80 minutes and then let it cool in the oven back down to 25. I don’t have a ramp and soak controller yet, just a regular Auberins one, but did my best to manually follow the ramp up in the doc. The part came right out of the mold but with the surface seen here. Seems like a lot of the resin ended up on the back side of the part. Too much vacuum isn't a thing right? You can run the vacuum the entire time? Does this look more like bad bagging technique? My stack is bagging, cloth on the bottom and under the hose adapter and then just the release over the carbon. Thanks for any advice. Chip- https://imgur.com/a/0djWj9T Edited 3 Years Ago by carguy84
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Lester Populaire	L Lester Populaire posted 3 Years Ago HOT Post Details
L Group: Forum Members Posts: 311, Visits: 13K	+x carguy84 - 1/4/2021 12:47:04 AM Not sure what went wrong with this. It’s two ply of the XC110 on an EB700 board that’s been CNCd, sanded and sealed with 120. EB700 machines excellent, BTW. I used FibRelease on the surface of the mold and cured it in the curing oven with the ramp to 70c, hold for 4 hours, ramp to 120 and held that for about 80 minutes and then let it cool in the oven back down to 25. I don’t have a ramp and soak controller yet, just a regular Auberins one, but did my best to manually follow the ramp up in the doc. The part came right out of the mold but with the surface seen here. Seems like a lot of the resin ended up on the back side of the part. Too much vacuum isn't a thing right? You can run the vacuum the entire time? Does this look more like bad bagging technique? My stack is bagging, cloth on the bottom and under the hose adapter and then just the release over the carbon. Thanks for any advice. Chip- https://imgur.com/a/0djWj9T I would say use a breather on the whole circumference and debulk after the first layer.
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carguy84	c carguy84 posted 3 Years Ago HOT Post Details
c Group: Forum Members Posts: 6, Visits: 176	I did a debulk after the first layer but I did not have the breather go all the way up the sides of the mold, I can try that today. After looking around the internet some more, I'm thinking I may have had a leak in the bag somewhere, will be on the lookout for that as well. Other than that I have no idea.
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Lester Populaire	L Lester Populaire posted 3 Years Ago HOT Post Details
L Group: Forum Members Posts: 311, Visits: 13K	+x carguy84 - 1/4/2021 12:41:10 PM I did a debulk after the first layer but I did not have the breather go all the way up the sides of the mold, I can try that today. After looking around the internet some more, I'm thinking I may have had a leak in the bag somewhere, will be on the lookout for that as well. Other than that I have no idea. Out of autoclave prepreg can be quite unforgiving in terms of process parameters...
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carguy84	c carguy84 posted 3 Years Ago HOT Post Details
c Group: Forum Members Posts: 6, Visits: 176	until my ramp and soak controller ships I'm a little behind the curve for temp processing, but Omega says it should ship this week. In the mean time I am going to check the bag and do a drop test spending a lot of time going over everything. thanks!
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carguy84	c carguy84 posted 3 Years Ago HOT Post Details
c Group: Forum Members Posts: 6, Visits: 176	So I took more care in doing the vacuum bagging and making sure there wasn't any leaks in the bag or the tubing and it came out MUCH better, but still am getting pin holes: https://imgur.com/a/wCN3t4G But it's a 1000 times better than the first run.
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KLComposites	KLComposites posted 3 Years Ago HOT Post Details
Group: Forum Members Posts: 26, Visits: 3.2K	Any bridging in the corners will draw resin away from the field and lead to pinholes. Not much resin to go around. Also, if you use peel ply, especially on thin laminates, you'll draw too much resin out of the part.
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Warren (Staff)	Warren (Staff) posted 3 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 7.9K	That is a much better finish. As said, corner bridging can make a real difference. So pay special attention to the corners. Also you can try holding it at the soak temperature for a bit longer to see if that helps resin flow. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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