"you building what? Are you mad?"

MontuckyMadman · Post by **MontuckyMadman** » Wed Jul 03, 2013 9:08 pm

pretty sure the cpl is the compression molding application only.
why do they keep changing shit and confusing me. I just tell them to give me the same shit I always use.

chrismp · Post by **chrismp** » Wed Jul 03, 2013 11:22 pm

We've always used the slow hardener and that's what you should get since the cured properties are the same with both hardeners! The cure for the slow hardener takes two to five minutes longer which is a non-issue even for small production runs!

MadRussian · Post by **MadRussian** » Thu Jul 04, 2013 4:20 am

MontuckyMadman wrote:pretty sure the cpl is the compression molding application only.
why do they keep changing shit and confusing me. I just tell them to give me the same shit I always use.

I missed last night, all kits sold with slow hardener. No need to choose.... Priceless

Approximately how much time do I have before cpl epoxy start jelling?

MM PDF file saying 20 min under heat.. IIRC you mentioning one hour under heat in the press somewhere. What you would you recommend?

MontuckyMadman · Post by **MontuckyMadman** » Thu Jul 04, 2013 8:31 am

we cook at temp for 40 min at 180.
20 min at 180 not enough.
Takes 15 min to get to temp so a full time in press is almost 1 hour.

MadRussian · Post by **MadRussian** » Thu Jul 04, 2013 10:35 am

second blanket complete

a few pictures
better picture of bus connection. I use section of extension cord so unused wires used as anchor

same bus when blanket completed

couple views of the blanket surface

not sure if this problem, only time will tell. When blankets rolled small wrinkle and few small bubbles under outer skin. Maybe one part silicone in tubes was not the best choice. For our application in the press under pressure shouldn't be a problem

falls · Post by **falls** » Thu Jul 04, 2013 7:59 pm

My professionally made blanket will crease like that if folded or rolled too tight. Doesn't seem to be a problem, just don't leave it folded/rolled too tight.
Mine doesn't have air bubbles. They could be a problem. I think the pressure in the press will flatten them out which might promote delam of the blankets as they try and spread. They may blow out the side of the blanket and then shouldn't be an issue anymore.

MontuckyMadman · Post by **MontuckyMadman** » Fri Jul 05, 2013 8:28 am

Those bubbles ade pretty small but if they were bigger it wouod tranlate to the length of the laminate and leave a wave.
Been there done that.
Your good to go. Press somthing already!!!

MadRussian · Post by **MadRussian** » Fri Jul 05, 2013 4:08 pm

MontuckyMadman wrote:Those bubbles ade pretty small but if they were bigger it wouod tranlate to the length of the laminate and leave a wave.
Been there done that.
Your good to go. Press somthing already!!!

1-st blanket have big bubbles. On my first run they did not get inflated. Will see. Maybe poke some holes. Maybe use thicker metal for cassette and for blankets I'm getting 22gauge steel for cassette and maybe 24gauge for blankets instead of 0.016" aluminium I planned for.

Unfortunately I'm not ready yet. Need to do a few more things. Can't wait. hopefully this summer get to press couple pairs

MontuckyMadman · Post by **MontuckyMadman** » Fri Jul 05, 2013 5:20 pm

Put the flat one on the bottom and poke those air bubbles.

MadRussian · Post by **MadRussian** » Thu Jul 11, 2013 6:18 pm

build controller box today. Nothing special 2 ETC and two switches. Not being electrically inclined this a big success

I didn't want to have box was a window for display and buttons.

MadRussian · Post by **MadRussian** » Fri Jul 12, 2013 12:29 pm

fire up blankets and the controller. Working very nicely, well I have nothing to compare to

don't know if it good, bad or ugly. Here is the results:
My goal was to test the temperature and it consistency, Only one bottom blanket tested. Without cassette. only blanket and 0.016"aluminum. Cardboard between blankets no pressure was applied. Probably good 3 hours blanket was on. I set temperature on the controller 150°F and used meat thermometer to test actual temperature. With 1°f differential temperature on the blankets fluctuate approximately 5 to 8° in either direction from set point. I did not noticed any difference between temperature reading in the middle and in the tip/tale area. So total temperature fluctuation 10 to 18° within each cycle. I will be getting 22gauge galvanized steel for the cassette if anything it should smooth out temperature fluctuation.

MadRussian · Post by **MadRussian** » Sun Jul 14, 2013 3:03 pm

played little bit more with controller today.
Inserted metal for cassette t help reduce fluctuations to 10°f. Tips running consistently hotter by 10°f. Entire cycle from point where controller shut off the blanket about 4 to 6 min. blankets actually on for about a 1.5 to 2 min.

Also difference in fluctuation of the temperatures I mentioned is between controller and meat thermometer actual fluctuation on the controller 3 to 4° above and below setpoint

doing it first time I have nothing to compare. Hope somebody can post their readout.

MadRussian · Post by **MadRussian** » Wed Jul 17, 2013 2:22 pm

first set of cores is ready to go. While looking nice in the picture I had so many problems and mistakes

was ready to give up twice. Have zero expectation on this pair will be surprised if it ever sees the snow lol

live and learn. Probably by far best skill to have go into this project would be woodworking

back on truck to press next week

twizzstyle · Post by **twizzstyle** » Thu Jul 18, 2013 11:43 am

You'd be surprised how many mistakes/flaws you can make and still get a perfectly skiable ski. I have a motto "that will fill with epoxy"

deepskis · Post by **deepskis** » Thu Jul 18, 2013 9:46 pm

MadRussian wrote:Probably by far best skill to have go into this project would be woodworking

So true!

Ski Builders Forum

Ski Builders Forum

"you building what? Are you mad?"