Casting head system on DISA line for producing small circular-ring shaped HT200 casting and design method thereof

Abstract

The invention relates to a casting head system on a DISA line for producing a small circular-ring shaped HT200 casting and a design method thereof. The system comprises a dead head, a dead head neck and a pouring system, wherein the pouring system comprises sprues, a runner and ingates; sprues are connected to the left side and the right side of the runner; four castings are distributed at an upper layer and a lower layer of the sprue at the left side, and each layer is provided with two castings which are symmetrically distributed around an axis that is the sprue at the left side; two castings are arranged at the upper layer and the lower layer of the left edge of the sprue at the right side; each casting communicates with the corresponding sprue through the corresponding ingate. The system is characterized in that the cross section of each of the sprues, the runner and the ingates is isosceles trapezoid; each ingate is provided with an included angle of 30 degrees relative to the horizontal direction; the ingates at the left side and the right side and in the same layer have the same cross section area; the cross section area of the spure at the lower layer of each side is 1.2 times that of the ingate at the lower layer of the same side; the cross section area of the sprue at the upper layer of each side is 1.2 times that of all the ingates at the upper layer and the lower layer of the same size.

Description

technical field [0001] The invention belongs to the technical field of cast iron technology, and in particular relates to a casting riser system and a design method thereof on a DISA line for producing small ring HT200 castings. The casting riser system can greatly improve the yield of castings. Background technique [0002] Casting is the process of pouring molten metal into the mold, cooling and solidifying to obtain parts with the desired shape and performance. Existing castings, especially small steel castings, usually have insufficient feeding in the gating system after solidification. Shrinkage cavity defects are formed at the thick wall, the intersection of two walls and the hot joint of the casting. Shrinkage defect is an important casting defect. Because the area of ​​the load-bearing surface is reduced, its existence will seriously weaken the strength of the casting. Compared with large castings, small castings are more likely to form shrinkage defects due to faste...

AI Technical Summary

Problems solved by technology

[0002] Casting is the process of pouring molten metal into the mold, cooling and solidifying to obtain parts with the desired shape and performance. Existing castings, especially small steel castings, usually have insufficient feeding in the gating system after solidification. Shrinkage cavity defects are formed at the thick wall, the intersection of two walls and the hot joint of the casting. Shrinkage defect is an important casting defect. Because the area of ​​the load-bearing surface is reduced, its existence will seriously weaken the strength of the casting. Compared with large castings, small castings are more likely to form shrinkage defects due to faster solidification, which will affect the shape and performance of castings and reduce the yield of workpieces

A certain small ring HT200 casting studied by the present invention is a kind of gray cast iron casting. In actual pouring, such a situation occurs, the process yield is low (57%), and shrinkage defects are prone to occur

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