+x

 

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.

+x

 

Lester Populaire - 2/8/2019 11:34:43 AM

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 media?

It might already be enough to just heat the vacuum bag with a heat gun along the sides, so it can conform better to the edge of the fabric to avoid race tracking.

cheers, Lester

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Balakrishnan Seeni - 3/3/2019 2:00:02 PM

+x

 

Lester Populaire - 2/8/2019 11:34:43 AM

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 media?

It might already be enough to just heat the vacuum bag with a heat gun along the sides, so it can conform better to the edge of the fabric to avoid race tracking.

cheers, Lester

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 

+x

 

Balakrishnan Seeni - 2/8/2019 10:43:26 AM

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)