The first photograph shows a press block mould made for the Ford motor company c1998. The pattern is made from polystyrene and the molten metal is then poured into the mould burning out the polystyrene pattern.
The second photograph shows the 11 tons of iron being poured into the mould.
Photographs and details courtesy of Maurice Martin.
This completes the picture showing what happens when the polystyrene mould is filled with molten metal.
Photograph and details courtesy of Alan Gibson, ex Technical Manager, Parkfield Foundries
Picture Stockton Archive 
These must have been taken before 1998 as stated because the foundry closed in 1996.
Also, the first picture shows the Heavy Foundry wall crane still extant. It was removed in the early 80s as I recall.
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