New nodular cast iron pouring system

Abstract

The invention discloses a new nodular cast iron pouring system including a sprue, the sprue is provided with a pouring cup used for pouring a liquid metal, left and right sides of the sprue are connected with cross pouring gates, each cross pouring gate is provided with a plurality of ingates, the ingates are connected with a casting cavity, and are used for leading a metal liquid to the casting cavity, the sum of the cross-sectional areas of the ingates is greater than the sum of the cross-sectional areas of the cross pouring gates, the sum of the cross-sectional areas of the cross pouring gates is greater than the cross-sectional area of the sprue, the ratio of the sum of the cross-sectional areas of the ingates to the cross-sectional area of the sprue is 1.85-2.15, and the ratio of the sum of the cross-sectional areas of the cross pouring gates to the cross-sectional area of the sprue is 1.65-1.45. By the way, the new nodular cast iron pouring system has small impact on the casting cavity, greatly reduces defects of sand holes, reduces iron liquid gravity potential energy, meanwhile provides excellent slag prevention effect, reduces the defects of the sand holes and slag holes, and greatly improves the internal and surface quality of nodular iron castings.

Description

technical field [0001] The present invention relates to the field of pouring, in particular to a novel nodular cast iron pouring system. Background technique [0002] The gating system is the channel in the sand mold that guides the molten metal into the cavity. A successful pouring process depends on the properties of the metal itself, the nature of the mold and the structure of the pouring system. Therefore, the structure of the gating system is very important for the quality of the casting. A good gating system needs to (1) guide the molten metal to fill the mold smoothly and continuously, to avoid turbulent flow that causes air entrainment, metal oxide inclusions and scouring of the cavity; (2) the direction and speed of the flow during the filling process can be adjusted. control to ensure that the outline of the casting is clear and complete; (3) fill the cavity in a suitable time to avoid defects such as sand inclusion, cold insulation, and wrinkle skin; (4) have th...

AI Technical Summary

Problems solved by technology

However, an unsuitable proportion of the cross-sectional area of ​​each part of the gating system is likely to cause slow filling and form a cold barrier.

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