Friday, December 7, 2012
08 Joint Design Nº 30
This is the second ball for the hip joints. I banded the two halves together in order to tack weld it with my wax pen. Click on any image to enlarge it.
This is my wax pen. It is a woodburning tool with a custom forged tip.
This is the ball, tacked together. Now I can remove the rubber bands in order to weld it with my wax pen.
When I weld it, I insert the tip of my wax pen down into the seam, so the two halves melt together.
I made a ring from a coil of clay to hold the ball while I fill in the weld.
The ball does not move when it is on the ring of clay. I can use one hand to hold the wax pen, and the other hand to hold the piece of scrap carving wax, which I use to fill in the weld.
The next step is to carve the filling down. I use my paring knife for this job.
First I carve the filling straight around, leaving a little bit above the surface.
Then I work back and forth across the seam with my knife, shaving the remaining carving wax down to the surface, following the form as closely as possible. Next, I will sand the seam with some 220 grit sandpaper.
This is the seam after sanding.
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