Infusion - resin up and down..

Discussion in 'Fiberglass and Composite Boat Building' started by SeriolaDumerili, Nov 25, 2010.

  1. SeriolaDumerili
    Joined: Sep 2010
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    SeriolaDumerili Junior Member

    I am trying to infuse four layers of glass and 1" thick foam inbetween. Looking the inlet tube I have seen that some resin is entering into the test piece and then the infusion stops with the resin going "back" leaving a bubble of air in the inlet hose. After 20-30 seconds infusion start again and stops after 10-15 seconds. Wetting were slow, in the finish I have suceeded. Do you have any explanation? What are the levels of vacuum that you are using when infusing?
     
  2. War Whoop
    Joined: Jun 2003
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    War Whoop Senior Member

    I never open the resin valve unless I have @ 28Hg make sure your foam has perforations if you are going over rough glass use double tape line,Nothing is more important than a good bag seal outside of feed strategy.
     
  3. SeriolaDumerili
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    SeriolaDumerili Junior Member

    Thank you for your answer. Correct me, but when I try with high vacuum levels, my impression is that there is no "room" for resin to go thru? I have understood that after the surface is completely wetted I should apply full vacuum. Also, I am novice can you pls explain "double tape line". Made 2mm holes in foam every 20mm.
     
  4. Herman
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    Herman Senior Member

    There is plenty of room for resin to travel. Even when the fibers are fully compressed (at endless pressure) there is about 30% of volume for resin.

    For now, try the following:

    -increase vacuum. As low as you can go.
    -check, double check and triple check vacuum integrity.

    Do you have any prior experience with resin infusion? Did you work at Prinz by any chance?
     
  5. SeriolaDumerili
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    SeriolaDumerili Junior Member

    I have infused some smaller parts, but this was first infusion with foam in one shot. No, just hobby, is there any joke with Prinz :)? I have heard that they closed their business here in Croatia.
     
  6. War Whoop
    Joined: Jun 2003
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    War Whoop Senior Member

    The holes are fine,Double tape, I use two strips of tacky tape on glass,Roll the bag in with a Mica roller use a large pleats instead of many small and you should invest in electronic ears if you are going to be doing a lot of resin infusion.
     
  7. Landlubber
    Joined: Jun 2007
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    Landlubber Senior Member

    Seriola,

    Email me and I will send you a 100 page pdf on the subject from one of the main suppliers. There are a few issues here to be attended to.
     
  8. SeriolaDumerili
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    SeriolaDumerili Junior Member

    My email is serioladumeriliAThotmail.com
     
  9. Landlubber
    Joined: Jun 2007
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    Landlubber Senior Member

    My file is over 56Mb, can anyone help me to get this through hotmail (max 25Mb)...it is a pdf file. I have tried to zip it, but it comes out the same size....
     
  10. SeriolaDumerili
    Joined: Sep 2010
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    SeriolaDumerili Junior Member

    Well that was my homework. I can obtain -30mm vacuum, the picture was taken when infusing. I will start next time with full vacuum.
     

    Attached Files:

  11. Herman
    Joined: Oct 2004
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    Herman Senior Member

    You can use www.transferbigfiles.com. Can you include my address? herman at bugattibuilder dot com

    About Prinz: I hoped you would have worked there, then you would have seen some infusion work. They unfortunately stopped now.
     
  12. micheleoda
    Joined: Aug 2009
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    micheleoda izarra-yachts

  13. DallasAB
    Joined: Nov 2010
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    DallasAB ThirtyFour

    I'd love to read through the 100 page document you have! If I can bug ya to send it over I'd be much appreciative!

    DallasAB at GMail dot com

    Thanks bunches Mate!
     
  14. Landlubber
    Joined: Jun 2007
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    Landlubber Senior Member

    Fellas, yes I do have this file, it is the DIAB booklet in pdf format, but it is 75Mb I have now seen and tried to get it across.

    I tried for herman yesterday and it ran out of time, so doing it again now.

    How do you get it from Transfer Big Files herman, do you have to buy it?
     

  15. idkfa
    Joined: Sep 2005
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    Location: Windward islands, Caribbean

    idkfa Senior Member

    You can upload it to rapidshare.com, and then post the link here for all to download. No need to register etc.
     
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