Bottom pouring type pouring system and preparation process

Abstract

The invention discloses a bottom pouring type pouring system. The system comprises a shell, the upper end of the shell is connected with a riser, the lower end of the shell is connected with a cross gate, the end of the cross gate is connected with a filter screen seat, the filter screen seat is connected with a sprue, the filter screen seat is in a hollow open shape, a filter screen is inserted in the filter screen seat, the upper side of the side, close to the sprue, of the filter screen seat is connected with a slag collecting ladle, an opening of the filter screen seat is plugged with a plug of the filter screen seat. The invention further discloses a preparation process of the pouring system. The preparation process comprises the steps of performing wax mold assembly and shell manufacturing; removing a refractory material on the side surface of the filter screen seat, and coating an internal fire material on the surface of a screen seat plug wax mold; roasting and dewaxing; and inserting the filter screen into the filter screen seat for airing, drying and storing. According to the system and the process, a slag collecting bag is arranged on one side of the filter screen seat, slag floats upwards and is gathered into the slag collecting bag before molten steel flows through the filter screen, the fine slag which is not gathered is filtered through the filter screen, it is guaranteed that the molten steel entering a casting part is pure, the casting quality is greatly improved, and the rejection rate is reduced.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a bottom pouring pouring system and a preparation process. Background technique [0002] The existing precision casting bottom pouring gating system uses a vertical filter, and the two sides of the filter seat are directly connected to the runner. When this process is applied, when the molten steel and the slag in the molten steel flow through the filter, the large Slag inclusions can easily blur the mesh of the filter screen, and it is difficult for the remaining molten steel to flow through the filter screen smoothly, resulting in insufficient pouring and cold shut-off of castings, resulting in a high rate of defective rejects. Contents of the invention [0003] The main purpose of the present invention is to provide a bottom pouring pouring system and a preparation process. A slag collecting bag is set on one side of the filter screen seat, and the slag is floated ...

AI Technical Summary

Problems solved by technology

[0002] The existing precision casting bottom pouring gating system uses a vertical filter, and the two sides of the filter seat are directly connected to the runner. When this process is applied, when the molten steel and the slag in the molten steel flow through the filter, the large Slag inclusions can easily blur the mesh of the filter, making it difficult for the remaining molten steel to flow through the filter smoothly, resulting in insufficient pouring and cold shut-off of castings, resulting in a high defect rate

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