QUALITIES AND PROPERTIES FOR REFRACTORIES

 

The flow of liquid metals in gating systems is in conformance with the laws of hydraulics.  Research has shown that each portion of the gating system must be designed properly if the maximum benefits are to be obtained.   Only in this way can equal flow be obtained from the horizontal system with multiple gates or sequential flow from step gates.  It is imperative to realize that the ideal gating system should achieve the following:

1.  Decrease the velocity of the stream and thereby reduce the opportunity for dross formation;

2.  Minimize turbulence in the mold cavity;

3.  Avoid mold and core erosion;

4.  Deliver molten metal to the mold cavity in a manner that will establish the thermal gradients  necessary to produce sound castings;

5.  Increase the casting yield.

Akron Porcelain offers a wide variety of gating components to address all of these issues to ensure a good pour and quality casting.  The use of AP&P ceramic gating components results in consistently better castings, elimination of slag inclusions, reduction of rejects, and lower total cost of production.  AP&P gating components will neither erode nor spall in service at temperatures to 3250 ˚F.  They will eliminate the doubt, which is always present with sand.  When returned with the scrap to the cupola, they combine with the slag, and in no way affect the composition of the metal.

AP&P gating components are used in all types of work from small castings in production quantities to large specials of 100 tons and heavier.  A combination of lengths on gating tubes can be furnished to eliminate most of the usual cutting.  Akron Porcelain's staff work with engineers and foundry personnel to design gating that will reduce the manual intensity and improve flow of metal to ensure quality results and cost savings.