During the pouring process, filling time of molten metal should be short to avoid early solidification of the casting.
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The process shakeout is generally referred to escaping of gases from the molten casting during the solidification.
Quick solidification of the casting can cause defects like shrinkages, cracks or blow holes.
Shot blasting operation is mainly done to identify the type of defects in the casting part.
A trimming press is a machine tool which is widely used for removing the excess material from the casting part.
Venting is a process which allows molten metal to compensate for its liquid and solidification shrinkage.
Which of the following effects is the effect caused by the ignition of oxygen due to high pressure and temperature of melt?
Improper venting during moulding process causes a diesel effect which further results in stress crack defects in the casting.
For proper venting, the pouring time is increased which allow easy escape out of gases from the mould without inducing any defects.
High viscosity of molten metal can help in removing of gases but will cause defects in the casting.
Porous sintered materials can be inserted into the mould cavity to act as a vent.
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