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

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

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Workshop Technology
The diaphragm moulding machine is used to

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
Give uniform sand hardness throughout the mould
Ram the sand harder at the back of the mould and softer on the pattern face

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