Workshop Technology
The centrifugal casting method, is used for casting articles of

Nonferrous metal only
Irregular shape
Symmetrical shape about vertical axis
Symmetrical shape about horizontal axis

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Workshop Technology
The diaphragm moulding machine is used to

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

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