By Jack.Strong - 12/10/2012 1:41:45 PM
Hi.
So i am making my 2 part mould at the moment, having watched a lot of videos. Theres a few things I dont get;
The need for a small radius at the interface. I would say to help demoulding and laying of the cloth, but surely it will transfer as an inclusion to the final shelled part ?
Following my diagram below shows the square plug, with flanges added, 1 side of the mould made from that flange, the 2nd side made off the 1st, the two moulds having cloth layed in and mounted together.
Ok so in this process I see two problems and would really appreciated someone explaining;
The part needs to be the same outer dimension but if I am laying cloth between the flange then I am increasing the size of the part ?
With the 1st mould, could i take it off the plug, then tidy up the 1st mould, then reattach it to the plug, fill the edges with plasticine and then make the 2nd mould ?
Thanks for the help. Will post photos up shortly.
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By Jack.Strong - 1/25/2013 1:11:22 PM
Hi Fred,
Why does a silicone mould have to be under high pressure ? Obviously the higher the better, squeezes out resin etc. But to get a flat surface on both sites could i not just clamp a silicone mould. Does silicone stick to curing polyester resin ?
Update: Well Ive made the mould now. Was very annoying as I broke the plug taking it out. It has made me question the radius so I think i will be getting some epoxy filler.
Next step is buying the supplies.
Is there anyway to determine the theoretical thickness of each cloth layer, once its been wetted ?
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