Molten iron dross filtering structure in casting mold

Abstract

The invention discloses a molten iron dross filtering structure in a casting mold. The molten iron dross filtering structure comprises a honeycomb filter screen block arranged in a pouring gate, the periphery of the honeycomb filter screen block is attached to the surface of the inner wall of the pouring gate, the pouring gate is jointly formed by a lower mold and an upper mold in a surrounding manner, the upper surface of the honeycomb filter screen block protrudes out of the upper surface of the lower mold, the upper portion of the honeycomb filter screen block is embedded into the lower surface of the upper mold, and the width of the part, on the water inlet side of the honeycomb filter screen block, of the pouring gate is larger than that of the part, on the water outlet side, of the pouring gate. According to the molten iron dross filtering structure, position stability of a filter screen and the sealing performance of the filter screen and the periphery of the pouring gate can beguaranteed, it is guaranteed that molten iron can effectively pass through the filter screen to achieve dross filtering, and the casting forming quality is improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of casting molds, in particular to a structure for filtering molten iron scum in a casting mold. 【Background technique】 [0002] Casting refers to the processing method of melting solid metal into liquid and pouring it into a mold of a specific shape, and waiting for it to solidify and form. The key to the slag avoidance design of the cavity gating system is to effectively filter the slag when the molten iron enters the predetermined design runner system. To solve this problem, in the prior art, a filter screen is provided in the gating system so that the molten iron can filter out slag and impurities before entering the cavity. In the prior art, what the overwhelming majority adopts is the zirconia filter sheet of honeycomb structure, and as patent publication number is that CN204094059U discloses a kind of filter screen sprue device for casting, and it has the following defects: 1) the honeycomb structu...

AI Technical Summary

Problems solved by technology

In the prior art, what the overwhelming majority adopts is the zirconia filter sheet of honeycomb structure, and as patent publication number is that CN204094059U discloses a kind of filter screen sprue device for casting, and it has the following defects: 1) the honeycomb structure The zirconia filter is fragile, and the fragments rush into the casting, which may cause the quality risk of casting scrap; 2) The zirconia filter with honeycomb structure is easy to cause turbulent flow of molten iron and form secondary slag; 3) The filter is installed in the In the sand mold, the molten iron impacts the sand mold, which is likely to cause sand inclusions in the casting; 4) The filter is installed in the mold, and its upper surface is basically flat with the upper surface of the corresponding position of the lower mold, resulting in a gap between the filter and the upper mold. The quality of scum in water is relatively light, and it will generally be suspended on the surface of the molten iron, and the molten iron passes directly through the gap, which cannot effectively filter

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