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Horizontal casting method for ultralong cast holes of cast steel and iron casting

A technology for horizontal casting and iron castings, which is applied in the field of horizontal casting of steel castings and iron castings with super-long casting holes. It can solve the problems of bending deformation of sand cores and high defective products of fusion castings, so as to improve the technical content of castings, improve the technical content of castings and The effect of added value

Active Publication Date: 2010-12-22
KOCEL EQUIP
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AI Technical Summary

Problems solved by technology

Restricted expansion and buoyancy of molten metal will cause fatal defects such as sand core bending and deformation
In cast steel and iron castings, when the hole diameter is greater than φ50 and the length-to-diameter ratio is greater than 15, metal tubes are usually pre-installed in the mold. After pouring and cooling, the metal tubes are cast in the castings to form super long holes. The casting method of the casting hole or the casting method of using a common sand core and using a large number of core supports to prevent the molten metal from bending and deforming the sand core. high defective

Method used

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Embodiment Construction

[0019] A method for horizontal casting of steel and iron castings with super long casting holes, characterized in that it comprises the following steps:

[0020] a. Sand core production: the diameter of the super-long casting hole is φ≥50mm, and the diameter-to-length ratio is ≥15. A tubular cooling medium channel is reserved in the center of the sand core, and the concentricity between the reserved channel and the sand core is equal to the diameter of the sand core. Within 1 / 10, high rigidity mandrel is used, and the sand core is ordinary furan resin sand;

[0021] b. Mold cooling channel is set: a tubular channel and a discharge channel for injection and discharge of cooling medium are provided at both ends of the mold;

[0022] c. Sand core installation and sealing: the two ends of the cooling medium channel reserved for the above sand core are respectively connected to the cooling medium injection and discharge channels installed in the mold and communicated with the outsi...

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Abstract

The invention relates to a method for casting an overlong cast hole, in particular to a method for horizontally casting the overlong cast hole in a cast steel or cast iron part. The invention is characterized in that the method comprises the steps as follows: manufacturing a sand core, arranging a casting mold cooling passage, installing the sand core, sealing, detecting the seal, pouring and cleaning. The invention provides a method for horizontally casting the overlong cast hole in the cast steel or cast iron part. The method is unique and simple and uses a sand core forced cooling method, and the obtained ratio of radial bending degree and length is less than 3 / 1000.

Description

technical field [0001] The invention relates to a method for casting super-long casting holes, in particular to a method for horizontal casting of super-long casting holes for steel and iron castings. Background technique [0002] At present, during the pouring process of molten iron and steel, the ultra-long casting hole sand core will be subjected to the heat transferred by the surrounding molten metal and the heat released during the crystallization process. As the temperature of the sand core increases, the sand core will sinter, crack, and linearly expand. Restricted expansion and buoyancy of molten metal will produce fatal defects such as sand core bending and deformation. In cast steel and iron castings, when the hole diameter is greater than φ50 and the length-to-diameter ratio is greater than 15, metal tubes are usually pre-installed in the mold. After pouring and cooling, the metal tubes are cast in the castings to form super long holes. The casting method of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D25/02B22C9/10
Inventor 彭凡原晓雷王向阳苏少静
Owner KOCEL EQUIP
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