A filter spout cup

Abstract

The invention relates to a pouring cup, in particular to a filter type pouring cup. The filter type pouring cup comprises a pouring cup with an opening, wherein the upper part of the pouring cup is used for accommodating molten iron; the lower part of the pouring cup is a sand mold; a straight pouring channel communicated with the molten iron is formed in one side of the sand mold; the lower part of the straight pouring channel is sequentially connected with transverse pouring channels parallel to each other; one end part of the transverse pouring channel on the lowest layer is connected with a tail straight pouring channel which is communicated with a casting and corresponds to the straight pouring channel; and a filter screen is arranged between the transverse pouring channels parallel to each other. The filter type pouring cup is unique in structure, and can play a purifying effect on liquid metal in the casting process of large-scale castings, thereby reducing the defects of slag inclusion and impurity inclusion, lowering cost and improving product quality.

Description

technical field [0001] The invention relates to a sprue cup, in particular to a filter type sprue cup. Background technique [0002] Inclusion defects are one of the main reasons for large castings to produce unqualified products. Inclusion defects cause a lot of quality, cost and efficiency problems in casting production. The current method to solve this kind of defect is to place a filter screen at the blocking section of the gating system, and use the honeycomb structure of the filter screen to filter the slag in the molten iron. However, some products cannot be equipped with filters in the pouring system due to the following conditions: 1) The size of the sand box and formwork is small, and there is no effective space; 2) The particularity of the process plan and product shape will cause the filter to not be added to the casting system. In process design; 3) Because there is not enough space for large-tonnage castings to place filter screens; this has caused serious sla...

AI Technical Summary

Problems solved by technology

However, some products cannot be equipped with filters in the pouring system due to the following conditions: 1) The size of the sand box and formwork is small, and there is no effective space; 2) The particularity of the process plan and product shape will cause the filter to not be added to the casting system. In process design; 3) Because there is not enough space for large-tonnage castings to place filter screens; this has caused serious slag inclusion problems in some products, and filtering technology cannot be used in some large-scale castings, resulting in inferior products

In addition, for some products, due to the inappropriate cross-section ratio between the sprue, runner, and inner runner, the flow rate of molten iron in the cavity is too fast, so that the molten iron rolls in the cavity, resulting in A large amount of secondary slag, too fast inflow velocity has a relatively large impact on the mold and sand core, resulting in broken sand molds and sand inclusion defects in castings

[0003] So far, there is no device that overcomes the above-mentioned defects

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