resin flow problem

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#1

VIP with VER at 29hg
more resin than fibre weight
10min leak test, all good
3layers plain weave glass
peel pply
2layers flow media
only 13x13 size on a piece of glass
temp 30c mold and resin
mekp 1%
resin is suposto be 300cps
mold is elivated from the resin inlet

:?: :?: :?: :?: :?: :evil: :evil: :evil:
I don’t know what Iam doing wrong, its starting to really tick me off
help please…
also the guage that is on the vac pump is showing lower reading than the guage on the presser pot???

It should only take a min. to infuse that size ??/
It starts okay then slowes right down, there is still resin in the inlet tube after i clamp it off, and no movement
Id show some pic’s but it keeps tellin me error uploading attatchment

#2

You’ll have to describe the placement of the resin inlet and vacuum lines to see if you’re creating a deadzone by where they are being positioned.

As far as posting pics, you need to upload them to a host (photobucket.com, etc), and then insert the url link in between these tags:

[img] link here [/img}

(note that the bracket “}” is intentionally changed to leave the formatting visible)

#3

Try a gel time test to confrim work time.

Switch vacuum gauges to see if one is bad or reading different.

Are you saying the part is resin rich after curing? Then maybe add an additional vacuum port by the inlet and unclamp it after the resin “in” port is closed to remove the excess resin there, if still in liquid form.

#4

Develbowg’- after the part was cure, the next day. I lifted the plastic from the sealent tape, not close the the vac tee and the pressure droped, wouldnt that show that thereis a passage for air throught the unsaturated glass??Iam even useing spirl tube off the tees wraped with peel ply!

the resin inlet is right on the edge of material and the vac is the same,

I did a resin cure test and with 25g resin and 0.7ml of Mekp thats 0.7% , IS that measurment right?
25 min to gel so that gives lots of time…the piece that Iam infusing is only 12x12, that should only take a couple min…

The pump a have Robinair is supostto have a 20 micron rating thats 29.7…HG at sealevel and I am at 1800ft above above sea level and I can only pull 27.5hg on my guages. Is that my problem…

#5

Not knowing how you laid everything out, I can only guess that the resin & vacuum lines need to be placed differently to insure the resin doesn’t reach the vacuum line until the entire area gets infused. If the resin reaches the vacuum before the rest of the part gets infused, then there’s a chance it will leave an area dry (not infused). Do you have a resin brake before the vacuum line?

Since the part is small, are your vacuum & resin lines on opposite sides of the part and run basically parallel to each other with the cloth to be laminated in between the two lines? Is the resin racing to the vacuum line before the everything gets infused?

#6

the resin isn’t even reaching the vac tee, flow is slow even with 2 layers flow media…the tees are on opposite sides of the glass parrellel to each other

I can only get 27.5HG on the guages Is that okay?
Ill try to upload some pics…

Whats a resin brake??

#7

Sounds like you’re doing everything right. I’d take a look at is the resin, 300 cps should be good enough, but given the problems your’e having you might try thinning it with styrene to lower the viscosity. The epoxy system I use is 300 cps (kinda of the viscosity of baby oil or warm cooking oil- not watery & not real syrupy)) and it will travel 12 inches in a couple of minutes with one layer of flow media.

Others have reported success infusing at higher elevations.

A resin brake/break is an area immediately before the vacuum line that has nothing but peel ply between the mold surface and the vacuum bag. Not every resin flow front forms a perfectly uniform infusion path as it travels through the laminate. Some areas will almost always reach the end on the laminate and then the vacuum line before all the cloth is infused. To allow sometime for the lagging resin flow to catch up, a resin brake/break significantly slows the “speedy areas” of resin flow down (puts the brakes on it) once it hits the “peel ply only layer”.

I don’t own a camera, so I don’t have any pics to show.

#8

I was using that brake of peel ply for the vac, but thought that there would be a vac lock so I tryied the vac right on the glass, still nothin.

I heard that adding styrene to the resin Iam using VER has a mechanical effect on the resin, Ive heard of using it to thin, If the parts aren;t for structurel support.

what about aciton, anyone use that ?? for thinning

the resin is on its last month of recommended shelf life, Ive alwas keept it in cool dark atmophere.

there was one infusion i did earlier in the year and the resin was alot runnier when I pore it to measure it, then know. I got a infared temp gun so i know that the temp is around 27-30c ???/

#9

url]http://brian-toombs.magix.net/

#10

try running your resins lines like this

#11

PROBLEMS you mean …
2 seprate resin lines or the two spirle tubing that come from one tee?

I drill a hole in the front of the tee to help with flow as well as resin going out each side.

I am using 56grams of glass material and 100g resin, that should be plenty>???
enough for waste in the cup and on the flow media…

I even thinned out resin with acitone, 1% it flowed farther but still not all the way…???/

#12

PROBLEMS you mean …
2 seprate resin lines or the two spirle tubing that come from one tee?

I drill a hole in the front of the tee to help with flow as well as resin going out each side.

I am using 56grams of glass material and 100g resin, that should be plenty>???
enough for waste in the cup and on the flow media…

I even thinned out resin with acitone, 1% it flowed farther but still not all the way…???/

cool
How did you get the pic in the Forum???

#13

what no more ideas guys?? :slight_smile:

#14

Fox, if you`ve got your infusion set up as in problems pic above the resin should fly to the vac line in no time, i have literaly just started another infusion of 2 moulds linked the largest one is about the same area as the one in the pic although pretty a complicated shape and the resin infused in less than 2 mins. I had one small area that was a bit slow but i just directed a heat gun at the area for a couple of seconds and away it went.

I am not using a recommended infusion resin but can overcome this by using heat to bring the viscosity down, you wouldnt believe the difference heat makes, i had the same problems as you in the beginning but using heat on my moulds and resin has sorted this. When i first tried infusion i used the wrong bagging material which blocked the flow media, you are not getting this happening are you?

#15

Iam using a VER resin and its suposto have a 300 cvp viscocity and that is the Medium viscosity that is for a multi porpuse resin, that is what the distributor tells me, that i have the wrong resin. I ve heard of people useing up to 400 viscosity resins and having success?

Iam getting some diffrent resin in a month so well see what happens//

thanks to all for the help…

#16

why don’t you thin 25% with styrene, that is what I do with my VER I am using

#17

Iam getting some new resin in a couple of weeks and Ill get some styrene to try on, thinning the resin.
The factory said that adding styrene will have a affect on resin making it weaker.
I think that if the piece that your making is not for a structure strength then that should weark good/…

#18

it depends on the resin. Some it has no effect some if does. Mine I can thin all the way to 40% without a problem

#19

ya that would be, what resin your using…

Its weird that I can’t ifuse with the resin iam useing, its rated a 300cps viscosity, and the other resin Iam getting is lower viscosity and should work. Ive heard of guys using up to 400cps resin and having success…