trouble with infusion


trouble with infusion
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Stephen.Pritchett
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Stephen.Pritchett
posted 5 Years Ago HOT
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Hi guys, hoping someone can help. I've been trying to infuse the pictured image. I've tried both directions, lengthways and across. The pictured attempt is from going across. Its 250 weight woven carbon fabric. I ran the spiral the full length of the mould and on the opposite side i doubled the thickness of infusion mesh. Every time I try I keep getting dry areas. Can anyone give any tips?
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trouble with infusion
Stephen.Pritchett - 5 Years Ago
     With such extremely dry areas I would guess your bag is not fully airtight. Make shure there is no leak in your bag by performing a drop test before starting the infusion.
oekmont - 5 Years Ago
     yes, best to use a digital absolute pressure gauge at the resin inlet for checking part vacuum level(lower than 20mbar) and integrity(0mbar drop in 5 mins or more for a part this size). This is the.....
hojo - 5 Years Ago
             Yes, as above, the picture does seem to show a part that has suffered air ingress, either during the process or in the cure stage. It looks particularly bad at the tight corners, which shows that the...
MarkMK - 5 Years Ago
                 Thanks for replies, the vacuum appeared to hold over the full 24 hour cure and I did do a leak test. However I don't have a gauge fitted. Your comments on the flow mesh are very valid, perhaps I am.....
Stephen.Pritchett - 5 Years Ago
     You really don't need a second resin inlet. This is a fairly easy part. I have done parts the size of half a car with only one inlet. A second one will only make it more difficult to solve the real.....
oekmont - 5 Years Ago
             ok fair point, had also thought about placing inlet in centre of part. Going to try a new layup with advice given. Some good points to note here. Its often the small details
Stephen.Pritchett - 5 Years Ago
                 The sound that your pump does/doesn't make when testing your vacuum should be enough, especially after 24 hrs, so a gauge isn't always essential Didn't spot this previously, but on such a small part...
MarkMK - 5 Years Ago

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