Basic furnace building
bricks and mud principles
-ceramic fibre, hardeners and glues
-furnace principles
-importance of tuning
De-waxing
theory
-temperatures
-relation to spruing, drains
-smoke problems
-ceramic bonds
Preheating
-heat soaking to strengthen ceramic bond
-heat soaking of cores to remove volatiles
-temperature control if strapped with fibreglas
Metal melting
ox/deox theory
-setting and care of crucibles
-setting of furnace by flame
-warming of tools and metal -general safety
Pouring
safety equipment
-suitable clothing and footwear
-superheat
-deslag, deox
-timing with moulds
-handling hot moulds
-pouring rate, skimming
-sand support
Knockout
-care necessary
-dust problems
By the end of the day - Moulds are de-waxed and strenghened. Metal melted and poured. Ceramic removed to reveal castings.