Workshop Technology
The upsetting is a process of

Joining the two surfaces of metal under pressure after heating
Increasing the cross-section of a bar
Reducing the cross-section of a bar
Bending of a bar

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Workshop Technology
The purpose of a gate is to

Delivers molten metal from pouring basin to gate
Delivers molten metal into the mould cavity
Act as a reservoir for the molten metal
Feed the molten metal to the casting in order to compensate for the shrinkage

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