Way's to b****r up Unimould...

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Way's to b****r up Unimould...

Author	Message
LaxFriedrichs	LaxFriedrichs posted 12 Years Ago HOT Topic Details
Group: Forum Members Posts: 58, Visits: 450	I've prepared my (sealed wood) pattern today for the Unimold system, and tomorrow will attempt to go through the process for the first time. Would anyone like to propose the most likely scenarios that would result in a sub-standard moulding? I'd like to get this right first time... Thanks all!
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wozza	wozza posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	Ok, here are some of the things that can go wrong!!!!!! Incompatible sealer used on the pattern/plug surface like unsealed body filler causing the Tooling Gelcoat to stick. Also if the sealer on the pattern/plug is still "green" then the heat generated during curing can cause it to soften causing release and surface finish issues. Insufficient Release Agent, again difficult release. Applying the Coupling Coat too soon. Can cause the Tooling Coat to "wrinkle" Applying the Backing Layers too soon. Again the heat generated during curing can effect the Tooling Coat. Demoulding too soon. The resin on the Backing Layers should have turned from cream to white. And obviously "mechanical lock" caused by undercuts etc on the pattern/plug. I use the Uni-Mould System all the time and if you follow the instructions/videos then all should be good. Hope that helps and let us know how you get on Warren Carbon Copies Ltd
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LaxFriedrichs	LaxFriedrichs posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 58, Visits: 450	Thanks for taking the time to reply, Warren. It's really appreciated. On the instructions PDF it doesn't mention considering surface tackiness, just that one should leave to cure for a minimum amount of time. Now if I were to wait an extended period of time between stages,( ie between the first and second gel coat, or between second gel coat and coupling coat, for example) is it an issue that the surface is no longer tacky? Many thanks, Adam Edited 12 Years Ago by LaxFriedrichs
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wozza	wozza posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	Not really. As long as you don't leave it more than 24hrs between stages you will still get a chemical bond between the resin systems. The Gelcoat and Coupling coats will still be tacky (by tacky I mean not cured) after that time as they require the resin from the next stage to cure them, ie the Gelcoat needs the Coupling Coat and the Coupling Coat needs the the Backing Resin. They are all designed to work together. Again hope that makes sense. Warren Carbon Copies Ltd
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LaxFriedrichs	LaxFriedrichs posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 58, Visits: 450	Thanks again, Warren.
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wozza	wozza posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	No problem. I have learn't the hard way So if a little bit of advice helps you avoid the pit falls that's great. For me that is one of the best things about this particular forum. Carbon Copies Ltd
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