J A A P K L I J N S T R A
+31 (0)20 4864727
At every stage problems can occur, stay alert!
THE FOUNDRY WAX MODEL
Deformation of the rubber
Missing volumes (air bubbles/ plaster pressure/ key & stability/ pressure while closing)
Extra volumes (air during mixing)
First wax coating:
Penciling, versus applying
Brushes (round or flat, hard or soft)
Manipulation while correcting/storing/transport
Surfaces & points of contact/pressure.
Vents. (avoid missing parts)
Feeders (avoid cold shuts)
Venting the core
Securing the core
Shall I cut my model (why and when) ?
Treating volumes (avoiding shrinkage)
Casting top down or down up
Controlling oxidations & dirt
2 Investment Mould
Avoiding ‘potatoes’ (penciling/spaying)
Importance of the first layer.
Avoiding cracks (flashes) & breaks
Form of the mould (round/square)
Ovens & Position in the oven
KILNS & CASTING