|
From what I can work out you need to first make a "plug" this is a replica of the final piece. The plug in this example is 1/12 section of the semisphere. Using this you make your mould which is a "negative" of your shape. Using this you can make as many sections as you need. The plug is no longer required. But making the first plug is usually the most costly and dificult part. The plug needs to be strong enough to take the force aplied by the mould while its forming. You could even use someones existing dome as the plug, but it may need to be braced for strength.
I emailed Ian Sharp and he told me that the mould has been used by several amatuers to build replica obserbatory's. Imagine doing the same here.
Last edited by netwolf; 27-03-2011 at 11:55 PM.
|