Questions on mold temperature maximum and curing temperature maximum


Questions on mold temperature maximum and curing temperature maximum
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ahender
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Tomorrow I will finally infuse the 12' canoe I have been working on for years. I'm going to preheat the mold and I want to elevate the temperature some during the curing process.
What is the ideal temperature I should aim for regarding the mold? The resin I am using has a cps of 600 so I think it needs to thin some once it hits the mold.
I also want to elevate the temperature once the infusion has completed. Is there a limit as to what this temperature can be?
Thanks again for offering such a great resource for those with limited knowledge in this area.
Alan


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ahender
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torsten Ker - 10/15/2020 3:03:14 PM
For my canoes I use epoxy infusion resin and infuse the part at 25C and a 30/70 mix of fast and slow hardener, once infusion is complete the temp of the mould is raised to 30C which shortent the gel time considerably, all of that under vacuum left for 8 to 12 hours,
I lost vacuum on one after 3 hours and the tension of the laminate in diffucult places sepereated it from the core in some places, hence now I gel it at 30C to avoid that
After that post cure for 8 hours  as described in  EC-TDS-IN2-Infusion-Resin.pdf
2hrs at 40°C
2hrs at 50°C
2hrs at 60°C
2hrs at 70°C

First time I did that  I was really suprised about how strong the epoxy got that way, 30% is not far off

Torsen. I want to get your opinion on bagging an irregular object like a canoe.  My attempt yesterday failed. I understand the concept of pleats. I watched a Gougeon Brothers video on this. It was a short video so every detail was not mentioned. In this demonstration, a pleat was made every few inches. It was also recommended the vacuum bag be 20% larger than the mold. A few questions I hope you can answer.

Where do your start when adding pleats? Should the bow and stern be done first or last?

My bag will be 120" wide and several feet longer than the linear feet of the inside of the mold. How do I determine where to start on the bag? I thought yesterday just pushing the excess bag into the boat would work but I still had bridging problems on the ends.

Thank you.

Alan


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ahender - 5 Years Ago
explorecomposites - 5 Years Ago
ahender - 5 Years Ago
torstenker - 5 Years Ago
ahender - 5 Years Ago
ahender - 5 Years Ago
Hanaldo - 5 Years Ago
explorecomposites - 5 Years Ago
ahender - 5 Years Ago
Hanaldo - 5 Years Ago
ahender - 5 Years Ago
ahender - 5 Years Ago
Warren (Staff) - 5 Years Ago
             Thank you Warren.
ahender - 5 Years Ago

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