Hammerhead
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| posted on 30/8/07 at 10:11 PM |
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Interesting grp moulding instructions
Just thought i'd share this.
http://www.instructables.com/id/EUAJPQ0F2FRV86O/?ALLSTEPS
Steve.
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mr henderson
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| posted on 31/8/07 at 07:03 AM |
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Some interesting stuff there. I liked the 'lost foam' method of making ducts.
He didn't say much about how to get a smooth surface on the moulds, though. I know from experience that that is probably the hardest part of the
whole process.
I wonder what the UK equivalent of the clear packing tape is? Brown tape can be quite difficult to remove. Maybe sellotape?
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smart51
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| posted on 31/8/07 at 07:12 AM |
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You can get celotape in the same size as brown parcel tape. Polyester resin doesn't stick to either, which is nice for making small parts
without moulds.
I use an old window for making flat pieces. Lovely smooth finish and it doesn't stick.
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RazMan
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| posted on 31/8/07 at 08:09 AM |
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That reminds me of the method of making odd shapes with polyester fleece material. You stretch the material over a former and simply wet it with
resin. The result is suprisingly strong.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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02GF74
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| posted on 31/8/07 at 10:05 AM |
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remember I was asking what material to make ribs?
in the end I used two methods:
1. bubble wrap rolled into a tube and held in place with sikaflex type stuff. lay the CSM over the top. What can be lighter than air and some
plastic? .... but I foudn that the epoxy does not stick to it so it can be pulled out.= - even lighter and neater 
2. carboard covered in polyester sheet - the stuff that the resin does not stick too. once set, pull out the carboard and then the sheet.
oin both cases one end of the rib is open -clearly this could not be done if it was sealed.
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