Gating Ratios & Solidification Curve | Metal Casting | Manufacturing Processes |
Channel: Mechpro classes
Date: 2020-07-29

In this video session we have discussed about gating ratios for pressurized as well as for non-pressurised gating systems in detail. In the 2nd part we have also discussed about solidification curve for pure metals as well as for alloys with a schematic diagram.

#gatingratio#solidificationofcasting#solidificationcurve#pressurisedgatingratio#nonpressurisedgatingratio

In casting, gating ratio is defined as the ratio of sprue area : total runner area : total gate area
The goals for the gating system are
To minimize turbulence to avoid trapping gasses into the mold
To get enough metal into the mold cavity before the metal starts to solidify
To avoid shrinkage
Establish the best possible temperature gradient in the solidifying casting so that the shrinkage if occurs must be in the gating system not in the required cast part.
Incorporates a system for trapping the non-metallic inclusions.
Solidification is the process of transformation of a liquid to a solid.

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