Workshop Technology
Lancing is the operation of

Cutting a sheet of metal through part of its length and then bending the cut portion
Cutting a sheet of metal in a straight line along the length
Bending a sheet of metal along a curved axis
Removal of metal to the desired shape from the edge of a plate

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Workshop Technology
A jolt machine is used to

Produce uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face

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