Workshop Technology
In sheet metal blanking, shear is provided on punches and dies so that

Cut blanks is straight
Good cut edge is obtained
Press load is reduced
Warping of sheet is minimized

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Workshop Technology
A jolt machine is used to

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

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