Difference between pressurized and unpressurized gating system
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The assembly of channels which facilities the molten metal to enter into the mold cavity is called the gating system.Alterantively ,the gating system refers to all passage ways through which molten metal passes to enter into the mold cavity.T he nomenclature of gating system depends upon the function of different channels which they perform.
Down gates or sprue cross gates or runnerslngates or gates.
Goals and gating system
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
Hydraulic principles used in the Gating System.
Down gates or sprue cross gates or runnerslngates or gates.
Goals and gating system
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
Hydraulic principles used in the Gating System.
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