Resin Vacuum infusion Pinholes / Dry spots

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Resin Vacuum infusion Pinholes / Dry spots

Resin Vacuum infusion Pinholes / Dry spots

Author	Message
Dromilious	D Dromilious posted 6 Years Ago HOT Post Details
D Group: Forum Members Posts: 15, Visits: 197	I don't use adhesive spray. i changed the wax with an other brand and i have not any more these marks
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Geteda	Geteda posted 6 Years Ago Post Details
Group: Forum Members Posts: 15, Visits: 58	You have tried to make a piece without adhesive spray? How long you allow the mold to dry before starting the infusion? Your mold has a perfect gloss finish?
	Reply Like 1
Dromilious	D Dromilious posted 6 Years Ago Post Details
D Group: Forum Members Posts: 15, Visits: 197	Hello my friends. Today i had the same issue . Like air bubbles trapped in but i am not sure. If you check the photos clearly you can see that they are not on the srface but a bit deeper . Like a bubble which has not blown.What do you think ?
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Geteda	Geteda posted 6 Years Ago HOT Post Details
Group: Forum Members Posts: 15, Visits: 58	Try using acetone or soft polish compound to eliminate these marks. note: take care with the soft polish compound, you can reduce the resin and touch the carbon..
	Reply Like 3
Hanaldo	Hanaldo posted 6 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	Are you using a spray adhesive?
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Dromilious	D Dromilious posted 6 Years Ago HOT Post Details
D Group: Forum Members Posts: 15, Visits: 197
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Warren (Staff)	Warren (Staff) posted 6 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8K	Its hard to tell from your photos exactly what it is. Almost looks like marks on the surface. Is it actual pinholes or bubbles trapped below the surface? Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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Dromilious	D Dromilious posted 6 Years Ago Post Details
D Group: Forum Members Posts: 15, Visits: 197	Finally after making some tests i have no dry spots on my parts .I think the problem was the unidirectional fabric .Also i have to mention that i use the MTI hose. I dont do degassing . But sometimes i had an issue .You can see these tiny marks like trapped air or else which i don't know what it is and what causes this result.Any ideas ? Edited 6 Years Ago by Dromilious
	Reply Like 1
Warren (Staff)	Warren (Staff) posted 6 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8K	Ideally you want a proper built vessel or at least something that has been tested to take the required pressures and levels of vacuum without failure. You can make a throw away catch pot/bag by making a small bag in vacuum bagging film and filling it with 3 or 4 layers of breather cloth. Insert it between the pump and bag and the breather will catch and soak up any resin that comes through. It is , however, ruined after each use as the resin goes off, but can be a good temporary solution. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
	Reply Like 2
Dromilious	D Dromilious posted 6 Years Ago Post Details
D Group: Forum Members Posts: 15, Visits: 197	+x oekmont - 5/24/2018 9:23:53 AM It is hard to see and hear, but I think you might have a leak in your vacuum system. I think I hear the noise, which oil bath rotary vane pumps produce, if the system isn't sealed perfectly. Additionally, if your system is perfectly sealed, your "degassing chamber" would be much to small. I usually use a pot five times the size of the resin volume, because the foam easily expands that much. Don't count on your analog vacuumeter, the point of degassing is quite a while behind the needle reaches zero (had a few vacuumeters so far, it was always the case). and last, but not least: Don't use this jar for degassing!!! And if you really want to, you could at least wear some kind of protection. And with some kind, I mean a bomb disposal suit. no, really, Don't do it. very, very dangerous. My friend you are so right ! I noticed what you told me for the glass jar and i am looking to make a degass chamber .Take a look at a can from baby milk what happened ! It exploded like a bomb ! Now i am thinking to use a cooking pot . What do you think ? will it be safe ?
	Reply Like 1