Laying method of casting system

Abstract

The invention relates to a laying method of a casting system in the technical field of casting. The laying method comprises the following steps: firstly, a plurality of gate positioning tables are fixed on a working table; then, a lifting bracket is arranged above the working table; cross gates are mounted at the lower side of the lifting bracket; ports of ceramic pipes in outlets of the cross gates are coated at the outer sides of the gate positioning tables; a mold is overturned to enable ingates to be upwards; ingate ceramic pipes are inserted in all the ingates, so that the upper end surfaces of the ceramic pipes in the ingates are positioned on the same horizontal plane; when sand flows to the upper port positions of the ceramic pipes in the ingates, the sand is scraped flatly; the lifting bracket is lifted to place at the upper side of the mold, so that the ceramic pipes in the ingates are in inserted connection with the ceramic pipes in the outlets of the cross gates one by one; inlets of the cross gates are connected with straight gates arranged outside; the sand flows again; when the sand is flatten to the positions of the cross gates, the lifting bracket is disassembled; the shaping of flowing sand is continued; and finally, the sand mold is overturned to finish the laying. The laying method can quickly build the casting system; the sealing among the ceramic pipes is excellent; and the quality of castings is better. The laying method is suitable for the production of bottom pouring type castings.

Description

technical field [0001] The invention relates to a laying method of a pouring system, in particular to a laying method of a pouring system of a large steel casting. Background technique [0002] When designing the casting process of large steel castings, considering the impact on the core and cavity and reducing the oxidation of molten steel, a bottom pouring gating system is generally used to allow molten steel to flow from the bottom of the casting into the cavity of the mold, and through process calculation In order to ensure the smoothness of the molten steel during the filling process and reduce the entrainment and splash caused by turbulent flow, the runners must be laid flat; due to the size and size of large castings and The tonnage is large, and the static pressure head of the molten steel is very large during the pouring process. If the strength of the pouring system is low, it is easy to cause sand washing or fire escape. [0003] In the actual molding process, th...

AI Technical Summary

Problems solved by technology

Due to the large number of gates in large steel castings, the gating system is complicated, and the available time of resin sand is only 40 minutes, which will largely lead to imprecise laying operations of the gating system

It directly leads to the problems that the runners are not on the same plane and the loose sand flows into the runners during the laying process of the pouring system, which affects the surface quality of the castings and the fluidity of the molten steel during the pouring process.

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