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Making A Plywood Upright Bass

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Step 2: The Mould

Picture of The Mould
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In order to make the bass' body a mould has to be used to give it it's shape. There are three shapes that I know of. The Gamba, Violin, and the Busetto. They are all very interesting and nothing short of beautiful and as my photo shows, I decided to make the violin style bass. In order to make the mould however, I had to draw it out on the 3/4 sheet of plywood using a grid. I had to be very careful with the placement of the corner blocks, neck block, and end pin block. Once it was drawn out, I proceeded to cut it out with the jigsaw. After it was cut out, I traced it over the sheet of plywood and cut it out again. These two mould layers were then separated in the middle with scrap wood. Finally, when the mould was cut out, I drilled a series of holes along the sides of the mould in order for the clamps to have something to grab on to.

In order to make the neck block, I assembled one out of 6 pieces that I cut out of the 2 x 10 x 12 and glued together(the last piece to be glued was thinned down by about 1/4 of an inch). I used the mitre saw to perform a dado cut on each neck block piece, I found it to be much more precise than cutting out the slot on top with a jigsaw. As for the corner blocks, I cut out four pieces measuring 8-3/4" long out of the 2 x 2 x 8. The end pin block was simply a piece of 2 x 6 that was cut to 8-3/4" in length.
 
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