Scrapmaster87
Well-Known Member
So right now I have my case and tube in the freezer right now to buy time to find the best solution...
Ok, so last night I rolled a a motor mount tube with 4 layers of 0.010" thick 7781 e-glass over 1 wrap of parchment paper with slow cure laminating epoxy (leap-tech). I left the layup to cure 8n my basement for about 20 hours before removing the case (low 60's/high 50's)
Here's where I got stupid/impatient, I figured the very slight tackiness was from the texture left by the peel-ply. I grabbed a piece of sandpaper and a pair of gloves to smooth up the tube in hot soapy water. When I got the tube hot it became soft, like I could crush it by hand if I wanted to.
Since I now had a slightly deformed tube in hand, I figured the best course of action was to cool the tube off and get the motor case back in so it cures to the correct shape. I got the case back in as shown then temperature cycled it to erase any sort of plastic memory.
I started getting a bad feeling about this, I tried to press the tube off by hand and only succeeded in buckling it slightly. All of this happened in the course of about 45 minutes. Normally I've been curing my layups at around 125-135 degrees, do I do this (or go hotter) and try to press the case out? The case was never treated with a wax or anything to help release any type of bond. Right now it should be easy to cut the tube off to play it safe
Ok, so last night I rolled a a motor mount tube with 4 layers of 0.010" thick 7781 e-glass over 1 wrap of parchment paper with slow cure laminating epoxy (leap-tech). I left the layup to cure 8n my basement for about 20 hours before removing the case (low 60's/high 50's)
Here's where I got stupid/impatient, I figured the very slight tackiness was from the texture left by the peel-ply. I grabbed a piece of sandpaper and a pair of gloves to smooth up the tube in hot soapy water. When I got the tube hot it became soft, like I could crush it by hand if I wanted to.
Since I now had a slightly deformed tube in hand, I figured the best course of action was to cool the tube off and get the motor case back in so it cures to the correct shape. I got the case back in as shown then temperature cycled it to erase any sort of plastic memory.
I started getting a bad feeling about this, I tried to press the tube off by hand and only succeeded in buckling it slightly. All of this happened in the course of about 45 minutes. Normally I've been curing my layups at around 125-135 degrees, do I do this (or go hotter) and try to press the case out? The case was never treated with a wax or anything to help release any type of bond. Right now it should be easy to cut the tube off to play it safe