Resin Infusion Problems - dry patches


Resin Infusion Problems - dry patches
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Balakrishnan Seeni
Balakrishnan Seeni
Balakrishnan Seeni
posted 6 Years Ago Split HOT
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Dear sir,

I did resin infusion process for 175 x 150 mm flat plate in glass and carbon fabric. But I faced huge problem. Here i attached the photos. Kindly help me to solve this problem.

I used Vacuum pump, specification is  630 mm of Hg (or )  24 in Hg. and its dry vacuum pump single stage. Is sufficient to do the infusion process?

Some times plate get good finishing. Some times problem will come (See the photos)
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Balakrishnan Seeni
Balakrishnan Seeni
Balakrishnan Seeni
posted 6 Years Ago HOT
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Posts: 3, Visits: 5
 
Warren (Staff) - 2/8/2019 11:19:33 AM
24inhg is a bit low and could well be the cause of the issues you have - or at least part of it..

I presume the dry patches are at the vacuum line end of the mould?  You may also find on such a small sheet, the infusion flows too quickly meaning it skips over the surface without enough time to soak in fully.  You can help this by throttling the resin feed with a line clamp to slow things down.

Thank you for your reply
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Resin Infusion Problems - dry patches
Balakrishnan Seeni - 6 Years Ago
     24inhg is a bit low and could well be the cause of the issues you have - or at least part of it.. I presume the dry patches are at the vacuum line end of the mould? You may also find on such a small...
Warren (Staff) - 6 Years Ago
             Thank you for your reply
Balakrishnan Seeni - 6 Years Ago
     To me this does not look like a pump/vacuum issue, but rather something that can be solved with the right infusion setup. Can you provide a picture of the opposite side of the part with the flow...
SleepingAwake - 6 Years Ago
             Thank You for valuable reply Lester.. here i attached the opposite side of the part. This side is fully impregnated. help me to solve the above problem
Balakrishnan Seeni - 6 Years Ago
                 I meant a picture of the bagged part with the flow media and vacuum line. A sketch would do if you don't have a picture...
SleepingAwake - 6 Years Ago
     Looks like you demoulded to early to me... you're talking of the problems on the bottom of your plate right? looks like resin was still sticking to the mould? You are using epoxy right? make sure it'...
matthieutje65 - 6 Years Ago

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