Method for solving problem of burnt-on sand of thick-wall steel casting

A technology for steel castings and sand sticking, which is applied in the directions of casting molds, mold components, and casting molding equipment to achieve the effects of convenient operation, reducing modulus, and solving the problem of sticking sand.

Inactive Publication Date: 2012-11-28
NINGXIA KOCEL GRP CO LTD +1
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Embodiment Construction

[0013] A method for solving the problem of sand sticking in thick-walled steel castings, which is characterized in that: the method first prepares Q235 steel and φ80 sand-insulated chill iron, and then evenly distributes the sand-insulated chill iron on the core bone, and then Put the core bone in the core box, control the thickness of the sand and cold iron sand barrier layer at 30-50mm, then start to flow a layer of 50mm thick chrome ore sand on the inner surface of the core box, focus on strengthening and compacting the corners of the nest, flow silica sand, and finally After unpacking, it can be painted three times with water-based paint as a whole.

[0014] The spacing between each sand-separating cold iron on the core bone is 100mm.

[0015] The above-mentioned chrome ore is a mixture of new chrome ore and regenerated chrome ore, wherein the weight content of new chrome ore is 15%-20%, and the weight content of regenerated chrome ore is 80%-85%.

[0016] After the above...

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Abstract

The invention relates to a method for solving the problem of burnt-on sand of a casting, in particular to a method for solving the problem of burnt-on sand of a thick-wall steel casting. The method comprises the following steps of: preparing the materials Q235 steel and Phi 80 sand-isolation chiller; uniformly distributing and welding the sand-isolation chiller on an arbor, and placing the arbor in a core box, wherein the thickness of the sand-isolation layer of the sand-isolation chiller is controlled at 30-50mm; enabling a layer of 50mm-thick chrome ore to flow on the inner surface in the core box; reinforcing and compacting the key corner parts; enabling silica sand to flow; and opening the box and coating the whole box with water-based paint for three times. The method provided by the invention is unique and can solve the problem of burnt-on sand of the thick-wall casting.

Description

technical field [0001] The invention relates to a method for solving the problem of sand sticking in castings, in particular to a method for solving the problem of sand sticking in thick-walled steel castings. Background technique [0002] The cooling and solidification of general steel castings is mainly cooled naturally in the sand mold, relying on sand molds, chilled iron, core bone and other media to exchange heat with the atmosphere outside the mold, solidify, and cool to room temperature. For castings with large wall thickness, only some single methods are adopted. Anti-stick sand means. However, the pouring temperature of large-scale steel castings is generally above 1500°C. Large-scale thick-walled steel castings, especially steel castings with closed or semi-closed structures, have thick-walled cavities around the sand core, and must withstand high-temperature molten steel for a long time. Burning and erosion can easily produce surface sticky sand defects. After a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D15/00B22C9/10B22C1/00B22C3/00
Inventor 张旭鹏扈广麒杨磊彭凡杨林闫新飞马文治罗永建张宏凯
Owner NINGXIA KOCEL GRP CO LTD
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