Talk Composites - The Forum for Advanced Composites
Back
Login
Register
Login
Register
Home
»
Advanced Composites Forum
»
Resin Infusion
»
Still having voids after several attempts
Still having voids after several attempts
Post Reply
Like
3
1
2
Next
Jump To Page
Still having voids after several attempts
View
Flat Ascending
Flat Descending
Threaded
Options
Subscribe to topic
Print This Topic
Goto Topics Forum
Author
Message
Hanaldo
Hanaldo
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 2.5K,
Visits: 28K
Great stuff, looks like a good result!
Reply
Like
3
syahnoo84
syahnoo84
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 7,
Visits: 171
Hello,
So i'm doing another infusion, and for this time, i make the part resin rich, just like the suggestion from Hanaldo.
And voila!
The void is gone!
Thank you all!
Reply
Like
3
fgayford
fgayford
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 433,
Visits: 1.2K
Hello
I would make 3 suggestions.
1 make sure your mold is very warm
2 make sure your resin is very warm
3 Do not let the infusion front go at full speed or it may skip over parts as I see in your picture.
open the feed line only enough to get the resin front moving at a slower feed which will allow the wetting process more time to fill every void.
Hope this helps.
Fred
Reply
Like
3
syahnoo84
syahnoo84
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 7,
Visits: 171
ah, 1 quick question. how do you fix this kind of void to perfection? do i need to have another layer of laminating epoxy covering the surface or just enough with clear coats?
Edited
10 Years Ago by
syahnoo84
Reply
Like
2
syahnoo84
syahnoo84
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 7,
Visits: 171
hanaldo, thanks for the advise. i will update once i done another infusion.
Reply
Like
3
Hanaldo
Hanaldo
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 2.5K,
Visits: 28K
Yep, see if your part is roughly 1sqm then that is no where near enough resin. The flow mesh itself needs 700g per sqm. Your part won't be 1sqm, it's a bit smaller than that, so that's why your results are close but still a touch dry.
To calculate your resin requirements, Paul has described a very good equation you can use:
http://www.talkcomposites.com/11/Resin-infusion-resin-usage-calculation
Reply
Like
3
syahnoo84
syahnoo84
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 7,
Visits: 171
i'm using just one layer of cf cloth. i figure out the exact weight of the cloth after i trimmed the edge. in this case, its 500 gram. And i prepare the resin about 700 gram. If this is not enough, can you guys share how do you calculate the resin?
Reply
Like
2
Hanaldo
Hanaldo
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 2.5K,
Visits: 28K
Air in the resin should only cause pin holes, this is totally dry.
Reply
Like
3
VVS
VVS
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Moderators
Posts: 226,
Visits: 334
Could this be from not degassing the resin long enough before infusing?
that is quite a heavy cloth and you could be transferring air from the resin to the weave joins.
I noticed this in some of my early infusions and have a better finish since leaving to degas a little longer, this is only from my own work as ive read people post that they don't worry about air bubbles in the pot.
Reply
Like
3
Hanaldo
Hanaldo
posted 10 Years Ago
ANSWER
HOT
Post Details
Group: Forum Members
Posts: 2.5K,
Visits: 28K
Looking at the TDS, the resin looks good so that shouldn't be an issue. And if your ambient temps are good then that should be fine too.
I think it's dry. What is your exact layup, ie. How many layers of carbon, is your infusion mesh covering the whole part, etc. How much resin do you mix up and how much do you have left over?
Reply
Like
2
GO
Merge Selected
Merge into selected topic...
Merge into merge target...
Merge into a specific topic ID...
Open Merge
Post Reply
Like
3
1
2
Next
Jump To Page
Similar Topics
Post Quoted Reply
Reading This Topic
Login
Login
Remember Me
Reset Password
Resend Validation Email
Login
Facebook
Google
Explore
Messages
Mentions
Search