sol wrote:zelph wrote:sol wrote:I always lurk this section as I am fascinated by the tools used by traditional craftmen, now I am glad I contributed
Hey zelph that's a great photo of the worked block usually you only get to see diagrams showing the process of taking lots of V shaped bites on the radius to get the semi-circle.
Hi sol, to be gin the process of making the core box 2 pieces of Poderosa Pine are pinned together to maintain the alignment of the two halves. While the 2 are pinned together, the circle diameter is scribed on the ends of them and then the scribe is highlighted with a pencil. The halves are then separated and pins removed. A table saw is then used to make a series of cuts to rough out the majority of material in the traugh/semi circle. The final cutting is done with the Core Plane and then hand sanded to the final finish. The pins are replaced and the core box is sealed with the appropriate sealer.
Zelph, that is so cool, have you actually completed the process yourself right down to the casting?
When serving an apprenticeship I started out making core boxes and painting patterns, the easy stuff comes first. I tested the core boxes with "plaster" to make sure all dimensions were right and pin location were dead on.
I personnally made an aluminum cannon from start to finish. Made the pattern, core box to hollow out the cannon and then melted and poured the alluminum into the "sand mold" My first foundry experience was in high school(not sure what they call high shool in the uk). In high scholl we actually melted iron in a miniture cuppola furnace. Interesting stuff!!!!!!