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fester
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Location:
Gympie Qld
Registered:
December 2004
Re: where to get Cro-Mo pipe + Carbon and use of carbon Sun, 20 March 2005 11:01 Go to previous messageGo to previous message
Interesting Sam.

Another way to get the parcel tray right is to mix resin and talcum powder (cheap baby powder)into a light filler and apply that where needed to fill some of the voids. I have a client who builds boats and I have seen him use this.

You could try and take a mould off the tray as it (with some sort of release method) if you want to save it and then work on tidying up that mould before using or taking another mould again but that would be much more work, time and materials but the only way if you want to retain the original tray in timber finish.

Also if you don't want to use a gel coat for a coloured look you can add a small amount of gel coat to your resin mix if you don't want the basic glass coloured look.

As for making moulds he gets his plugs very smooth and then waxes them before taking the mould off it. This is used for the boat parts to get a perfectly smooth finish. They also wax the mould instead of using a release agent as it's smoother.

I once moulded a motorbike rear mudguard off a Suzuki RGV250 by sanding it super smooth inside and moulding off that. It was good but with the release agent not totally perfect. Probably even more important when you use gel coat.

If you wanted some good how too's on moulding and glassing you should try and get ahold of some old issues of Performance Cars I think it was they did a series of articles from basic fibreglassing to proper mould making with special mould stuff rather than just glass.

your idea of a timber frame to teh mould is spot on. The boat guys mould it around a steel frame as they are going to use it hundreds of times.

For your bonnet shape and strength why not take a mould of both sides and then join them together with a sandwich layer of whichever foam style product you choose. The ribs on the underside would add heaps of tortional strength as well and of course it would look correct also.

you probably also want to resin in a steel or alloy plate where your brackets, hinges etc go to spread the load better and give more strength in those sections. Cut away the foam there and add alloy plate of same thickness or something.

Again the boat guys sandwich in ply sheets.

I assume you also already know you cannot have any inverse curves or corners etc in a one piece mould or you will have bucklies getting the panel out without damaging one or the other. That's when you ahevt o start getting involved with 2 piece bolt together moulds.

Gavin
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Read Message   where to get Cro-Mo pipe + Carbon and use of carbon Sam_QThu, 10 March 2005 14:04
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon stevenvandecauterThu, 10 March 2005 14:09
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon Sam_QThu, 10 March 2005 14:18
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Fri, 11 March 2005 00:12
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon oldcorollasFri, 11 March 2005 00:23
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gianttomatoFri, 11 March 2005 09:28
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon slydarSat, 12 March 2005 01:36
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon dravenSat, 12 March 2005 03:53
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon slydarSat, 12 March 2005 04:02
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon dravenSat, 12 March 2005 04:05
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon slydarSat, 12 March 2005 04:09
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon dravenSat, 12 March 2005 04:13
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon Sam_QSun, 13 March 2005 21:22
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Sun, 13 March 2005 23:27
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon Sam_QSun, 13 March 2005 23:49
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Mon, 14 March 2005 00:03
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon oldcorollasMon, 14 March 2005 00:26
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Mon, 14 March 2005 01:55
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon oldcorollasMon, 14 March 2005 02:41
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon BazookaMon, 14 March 2005 08:13
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon Sam_QMon, 14 March 2005 13:55
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Mon, 14 March 2005 20:33
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon BazookaTue, 15 March 2005 03:06
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Tue, 15 March 2005 03:33
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon Sam_QTue, 15 March 2005 10:13
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon gold28Tue, 15 March 2005 20:40
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon leighWed, 16 March 2005 01:41
Read Message   Re: Where to buy: Cro-Mo pipe + Carbon Sam_QWed, 16 March 2005 11:46
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon gold28Wed, 16 March 2005 22:07
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon Sam_QFri, 18 March 2005 13:23
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon MFX_Neko_86Fri, 18 March 2005 14:25
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon Sam_QFri, 18 March 2005 21:40
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon Sam_QFri, 18 March 2005 21:55
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon Sam_QFri, 18 March 2005 22:12
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon MFX_Neko_86Sun, 20 March 2005 07:11
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon  festerSun, 20 March 2005 11:01
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon MFX_Neko_86Sun, 20 March 2005 12:15
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon gold28Mon, 21 March 2005 00:02
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon MFX_Neko_86Wed, 23 March 2005 04:21
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon Sam_QWed, 23 March 2005 06:59
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon gold28Thu, 24 March 2005 00:21
Read Message   Re: where to get Cro-Mo pipe + Carbon and use of carbon MFX_Neko_86Thu, 24 March 2005 11:42
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