Blocks

Cut spruce blocks to the following sizes: Top: 31 x 50 x 22mm, Bottom: 33 x 46 x 20mm, Upper corners: 32 x 25 x 28mm,
Lower corners: 32 x 25 x 28mm.

Fit these in the mortices in the mould. The blocks should fit loosely but precisely. Make sure the annual rings are directed away from the mould as in fig. 2.1. and 2.2
 (image: http://www.makingtheviolin.com/images/2_1.png) 2.1


At the bottom side of the mould, screw in four screws into the predrilled holes so that the mould gets lifted by approximately 9mm. Make sure that all four screws make contact with the workbench and that the mould is perfectly stable.

Reinsert the blocks and make sure they fit perfectly.

The heights of the blocks can now be trimmed to the final heights of the ribs plus 2 mm.

Glue the blocks to the mould using medium thickness hide glue. Hold in position with your hands for about 30 seconds.

Once the blocks are completely dry, sand them down on both sides of the mould close to the final heights using a long belt of sanding paper clamped down on both sides to the flat workbench. Later on you will finalize the heights of the ribs using this method with the ribs already glued on.
 (image: http://www.makingtheviolin.com/images/2_2.png) 2.2


Take the template, realign it with the mould, mark the contour on all the blocks with a pencil or a scribe. Mark the true center of the violin on the top and bottom blocks. Flip over and do the same on the other side.

Category: Building