Lightweight carbon fibre dual 8" 18/36V BUILD |
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Keivn.Pawlus
Registered User Joined: 30 September 2017 Location: Sweden Status: Offline Points: 16 |
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Thanks for the tip. When you say it, I think I have read it somewear also. |
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Keivn.Pawlus
Registered User Joined: 30 September 2017 Location: Sweden Status: Offline Points: 16 |
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Some problems did occur when i tried to release the mould. It was completely impossible to release.
I think the main reason for this was the shape of the mould, I ended up scrapping the whole project and started from the beginning again. https://postimg.org/image/15myuztusr/ - https://postimg.org/image/6klhdfaah7/ - This time I will try with a 4-piece split mould instead of a 2-piece split. Also a different release agent this time. Thank you for all the comments so far
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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Have you considered revising the design to a more simple hand layup with flat panels? There are some very well documented foam core builds on the TalkBass forums - the ZacLite builds especially, although many of the images are now dead links
People on diyaudio talk about foam core builds quite a bit as well but I didn't see any comprehensive documenting of the builds and theory behind it as on TalkBass. I used 25mm foam and 2 layers of 185gsm glass on each side (plus a bit extra here and there and some bracing inside). Feels solid as a decent wooden cab to me and does the job on the sound, haven't measured it or a/b with a wooden equivalent though. That's woven roving of course not CSM. Ideally you can get an even tighter knit weave of glass cloth, e-glass it may be called. The tighter the weave the better and it'll always be way cheaper than carbon. The process was messy and laborious and the finish tricky, but the guys on TalkBass did a much better job with similar results. Edited by Hemisphere - 29 October 2017 at 10:00pm |
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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Did you use mould release wax on the mould or something else to aid release? I'm not sure if this is a silly question or not as I know nothing about glass moulding
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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What product are you using to finish your mould in? A strene based product requires a week minimum to stop leaching before you try taking a pull from it. 10 coats of semi permanent release works a charm on new moulds. And compressed air and blower is your friend when it comes to release it. |
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Keivn.Pawlus
Registered User Joined: 30 September 2017 Location: Sweden Status: Offline Points: 16 |
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Yes, the first time I used one coat PVA release agent. And I had to scrap it, it was impossible to remove. I think the problem was caused by the shape of the mould and also the surface finish. So i'm not saying its a bad release but it didn't work for me. Second time i used 6 coats of easycomposites Easy-Lease. It came of very easy The second time I also build an 4-piece split mould
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Keivn.Pawlus
Registered User Joined: 30 September 2017 Location: Sweden Status: Offline Points: 16 |
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I used the complete"Uni-Mould Making System" from Easycomposites. Everything worked very well
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Keivn.Pawlus
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Keivn.Pawlus
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After two years I¨m almost finished. This project had taken far more time than I first though. I also learned that carbon fibre is very hard work with. Right now ïm waiting on two coils that I have ordered and hopefully I will have them tomorrow. Then i can build the crossover |
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Keivn.Pawlus
Registered User Joined: 30 September 2017 Location: Sweden Status: Offline Points: 16 |
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