By Carbonphoenix - 12/3/2020 2:16:32 AM
Hey all,
Been having problems,
One of my staff has been laying up some new moulds (vinylester tooling), and despite post cure and 10 waxes, the prepreg is sticking badly.
So much so, that we have to break the part to save the tooling, to the point of literally ripping it out.
What the hell is the issue?
over cooked? tooling not post cured enough?
Pics attached for reference 
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By explorecomposites - 12/4/2020 3:39:05 AM
In general wax and prepreg are not an ideal combo. I have never had good results, even using high temp wax - porosity happens and it is hard to demold clean. A sealer and semi-permanent chemical release would remove the wax variable at least - just be sure to clean the mold really well before switching over.
Have you had success with this tooling resin and release wax and prepreg combo in the past?
What kind of ramp rate and cook temperature are you using? Type of prepreg? Is the green stuff wax residue or bled-through core-bonding film? Are you debulking the prepreg consistently?
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