|
carboncactus
|
|
|
Group: Forum Members
Posts: 243,
Visits: 1K
|
|
|
|
|
|
Matthieu Libeert
|
|
|
Group: Forum Members
Posts: 955,
Visits: 3.4K
|
One extra remark, make sure your wood is sealed, the exotherm reaction, creating heat, could make evaporate some water in the wood, causing some reactions on the mouldsurface.
|
|
|
|
|
LaxFriedrichs
|
|
|
Group: Forum Members
Posts: 58,
Visits: 450
|
There will be no heat in the process. I will be doing resin infusion. Will tell you how I get on...
|
|
|
|
|
carboncactus
|
|
|
Group: Forum Members
Posts: 243,
Visits: 1K
|
Is your mould going to be subject to heat? i.e. postcured, used for prepreg? If not, you might have a completely useable mould first time. There could be air behind the gel coat, but you dont know about it until the mould is heated and the air expands, creating blisters on the surface. And if the mould is not going to be in an oven at any time, it will be fine 
|
|
|
|
|
LaxFriedrichs
|
|
|
Group: Forum Members
Posts: 58,
Visits: 450
|
Yes, it's my first mould. My hope is to prove you wrong by following the instructions precisely, but the likely outcome is probably as you say. Prep, prep and more prep is in order so I don't 'faff' around too much.Once again your input is appreciated mate.
|
|
|
|
|
carboncactus
|
|
|
Group: Forum Members
Posts: 243,
Visits: 1K
|
Yep, semi permanent release agent. Solvent based semi permanent sealer and release agent if you wanted to be more exact lol. Just buy the £80 Unimould kit, some release, acetone, filleting wax, and something to make flanges with if they are needed. Don't want to be negative, but if this is your first mould, you WILL fook it up. The small kit should give you 2 shots at it. Make sure you follow the data sheets TO THE DOT. Weigh all your resins, heat the room up, make sure there is no air in the laminate, and make sure you work fast with the reinforcement resin. Too slow and 2 things can happen. It could gel before all layers are down and therefore it wont exotherm, or it will exotherm before you are finished consolidating it.
|
|
|
|
|
LaxFriedrichs
|
|
|
Group: Forum Members
Posts: 58,
Visits: 450
|
carboncactus (12/06/2013)
This week I will be finished with my wooden part project. I will post loads of pics. It will be a prepreg pull. But to answer your question, just use wax, or a semi perm and Unimould. Technically, you are releasing off lacquer, not wood. Whatever material is under the lacquer doesn't matter. Thanks again. I'm considering Unimold atm, due to the size ( aprox 600mm x 400mm x 150mm). 'Semi Perm' is a semi-permenant release agent, yes?
|
|
|
|
|
carboncactus
|
|
|
Group: Forum Members
Posts: 243,
Visits: 1K
|
This week I will be finished with my wooden part project. I will post loads of pics. It will be a prepreg pull. But to answer your question, just use wax, or a semi perm and Unimould. Technically, you are releasing off lacquer, not wood. Whatever material is under the lacquer doesn't matter.
|
|
|
|
|
LaxFriedrichs
|
|
|
Group: Forum Members
Posts: 58,
Visits: 450
|
Matthieu, I was just wondering if there was a optimal method of mould making that would be best for a laquered finish wood part.
|
|
|
|
|
Matthieu Libeert
|
|
|
Group: Forum Members
Posts: 955,
Visits: 3.4K
|
|
|
|
|