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

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

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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 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
Produce uniform packing of sand in the mould

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