On Wednesday, January 2, 2019 at 11:00:06 AM UTC-6, Craig Lowrie wrote:
Hi Chris,

I build a cellotex box (building insulation material) and then use a
small bar heater placed low in the box. The Control is achieved using
a commercial Kiln controller which achieves the required temperature
from a thermocouple placed somewhere appropriate in the heat box,
and then controls the temperature to +/- about 1 degree by turning
the bar heater on and off. You can program the cure time and it cuts
it off at the end. I use a separate USB temperature monitor to get
the date to support the cure. Done about 25 cures with this system
now and no problems.... I have done most cures at temperatures of
55C but also done some specialist cures as high as 80C....

I think a fan approach might struggle into a sealed box....

Craig

At 20:45 31 December 2018, wrote:
I am looking for some advise regarding "Post Curing of Epoxy
Composites".=
=20

The sailplane composite repairs have been completed regarding my
salvaged
A=
SW-27. The tail boom has a new 3'long intermediate section that
has been
s=
carfed and glassed into position. The fuselage pod had some radial
cracks
=
and the seat pan had some fractures that were all scarfed and
glassed. All
=
of the composite repairs were done at room temperature using OEM
materials
=
and MGS epoxy.=20

What temperature is recommended and for what duration should I
be using
for=
post curing the repaired areas. Is there a temperature ramp up
and ramp
do=
wn time that I need to work with. I plan to build a foam insulation
box
ar=
ound the repair areas and use a fan with a number of light bulbs to
regulat=
e the temperature.=20

Any advise is greatly appreciated,
Thanks,
Chris


Craig,

Are you using an infrared bar heater or something different. What size and type has been working for you. Have you had any problems with the overheat cut off protection.

Thanks,
Chris