|
|
#11
01-23-2015, 10:31 PM
|
|||
|
|||
Quote:
Also do, drill holes in the core for excess resin to be pulled into the core.. That stuff is very Porous and the key to foam if to have as much resin soaked up into the foam...i like to do a hot shot layer of resin to help with the bond if I cannot vacuum bag it..this is with using polyester. I do a hot bond to seal the foam and then while still tacky go with a layer of csm mat In between the foam and what you are bonding. Always lay csm against the foam , not the stich mat. So on your final layer of laminate lay another csm to finish off.. So the lay up will be from the skin, 1 ,1708, mat side to hull skin. 1 -,1.5 oz mat csm next , Foam,the Csm mat, Then 1708,1708,1708 .the .08 being on the outside if you want a smoother finish Cabosil and resin the foam with a sqeegee , get that stuff in the foam ,work it in.. Then a notched trowel after ,once done Set your foam and clamp up. Then come back with a sqeegee and clean up the excess, Work the resin in the voids at the bottom and sides of hull. And clean excess off the foam face so that it will be easier to lay your final layers of 1708 on top of foam. Make sure the csm mat is the first layer against the foam core. Then alternate the 1708. Finishing up with the mat of the 1708 on the last layer facing out.. 
|
|
#14
01-25-2015, 11:12 AM
|
|||
|
|||
|
I've used different brands of epoxy at below recommended temperatures into the 40 & 50 degree range many times and have never had any issues. It will have a longer cure time for sure but that will make life easier in this case. After you get everything put together maybe some mild heat like an electric blanket might help.
Rod
__________________
The older I get the faster I was!
|
|
#15
01-25-2015, 12:20 PM
|
|||
|
|||
|
Two things. Coosa is not a porous foam, much less so than plywood, so it will not soak in much of any resin, but plenty enough for bond strength
As for temps, that temp is perfect because you will have a better working time. If you have sun after completion, put a tarp over the area when done and you will have plenty of curing heat. You can do this the day after for final cure. Most if not all epoxy will be curing at above 40 but slowly at that temp. You should try to keep the resin itself at the recommended temps for mixing however in order to get the reaction going and also for it to dispense well if using dispensing pumps.
|
|
#16
01-25-2015, 04:28 PM
|
|||
|
|||
|
Quote:
Do a test batch of resin and time how long it takes to set up in a cup ,of coarse , say about at least an oz. Of mixed resin.. And see how long it takes to harden. Measure the temp of your resin before you mix...when I first started with polyesters and epoxys, I always did a test batch to check my window. Especially when doing a large layup. More so in 85-90hot weather or cold 40-50. weather. Goodluck and have fun
|
|
#17
01-25-2015, 05:15 PM
|
|||
|
|||
|
Quote:
Do a test batch of resin and time how long it takes to set up in a cup ,of coarse , say about at least an oz. Of mixed resin.. And see how long it takes to harden. Measure the temp of your resin before you mix...when I first started with polyesters and epoxys, I always did a test batch to check my window. Especially when doing a large layup. More so in 85-90hot weather or cold 40-50. weather. Goodluck and have fun
|
|
#18
01-25-2015, 06:28 PM
|
|||
|
|||
|
Quote:
Do a test batch of resin and time how long it takes to set up in a cup ,of coarse , say about at least an oz. Of mixed resin.. And see how long it takes to harden. Measure the temp of your resin before you mix...when I first started with polyesters and epoxys, I always did a test batch to check my window. Especially when doing a large layup. More so in 85-90hot weather or cold 40-50. weather. Goodluck and have fun
|
 |
|
|
Linear Mode
