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The residual molten metal cannot flow back to the crucible and it remains in the riser tube.

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in Casting-Forming-Welding I by (687k points)
The residual molten metal cannot flow back to the crucible and it remains in the riser tube.

(a) True

(b) False

This question was addressed to me in examination.

The origin of the question is Low Pressure Die Casting topic in chapter Special Casting Techniques of Casting-Forming-Welding I

1 Answer

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Best answer
Correct answer is (b) False

The best explanation: When the mould cavity is filled with molten metal, the pressure in the crucible is removed. This allows the molten metal to flow back to the crucible through the tube. Then after solidification, the sides die opens and the top die is raised vertically. And the casting moves with the top die and ejected onto a transfer tray.

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