Rapid casting mold cooling method

A rapid cooling and casting technology, applied in the field of casting, can solve the problems of easy generation of slag inclusions and pores, and achieve the effects of reducing thermal effects, reducing defects, and improving mechanical properties.

Inactive Publication Date: 2016-12-07
HANGZHOU STEAM TURBINE CASTING & FORGING
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a method for rapid cooling of casting molds, which aims to solve the technical problems in the prior art that slag inclusions and pores are easily produced in the casting process of H-type compressor blades

Method used

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  • Rapid casting mold cooling method

Examples

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Embodiment 1

[0042] There are two air passages 3, which are placed on the left and right sides of the pattern.

Embodiment 2

[0044] The quantity of air duct 3 is 4, and is divided into the surroundings of pattern.

[0045] Compared with the castings obtained in Example 1 and Example 2, the cooling rate in Example 2 is more obvious, and the effect of slowing down the heat effect of the casting on the sand mold between the blades and reducing the defects of the blade parts is also more obvious. In addition, the first and second embodiments both adopt the method of cooling while pouring. Compared with the current common method, the crystal grains of the casting are refined, the mechanical properties of the casting are also improved, and the overall quality of the casting is improved.

[0046] The invention provides a rapid cooling method for casting molds, especially for H-type compressors, which significantly improves the quality of the partition blades. Through batch trial production, the H-type compressors are produced by blowing compressed air during the pouring process. Castings are subjected to n...

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Abstract

The invention discloses a rapid casting mold cooling method. The method comprises the following steps of production technology preparing, material preparing, sand making, modeling, drawing, mould assembling mold casting, melting, pouring cooling and shaking out after curing. According to the rapid casting mold cooling method, ventilation channels are manufactured in the casting modeling process, compressed air is blown in during pouring to conduct manual strengthened cooling, the casting cooling speed is increased, and a very good effect is achieved for relieving the sand mold heat effect; defects of a casting due to molding sand heating can be reduced, and therefore generation of defects of blade parts is reduced. Cooling is conducted while pouring is conducted, the grain of the casting is refined, the mechanical performance of the casting is also improved to a certain degree, the quality of the casting is improved, and especially the quality of partition plate blades for an H type compressor is obviously improved; and through the batched trial manufacturing, the partition plate casting produced by adopting the method for blowing the compressed air in the pouring process is subjected to nondestructive testing after grinding, and the quality situation meets the requirement and is greatly improved compared with original partition plate castings.

Description

【Technical field】 [0001] The invention relates to the technical field of casting casting, in particular to a method for rapidly cooling a mold. 【Background technique】 [0002] H-type compressor is an important equipment in metallurgy, chemical industry, oil and gas and other industries, and has a great market potential. It is a field that Hangzhou Steam Turbine Co., Ltd. expands its product structure and focuses on. In order to meet the needs of the joint-stock company, Hangzhou Steam Casting and Forging Development and manufacture of H-type compressor castings. [0003] The baffle is an important part of the H-type compressor. There are N reflux blades evenly distributed on the baffle. The quality of the blades is the key to the manufacture of the baffle castings. At present, the main difficulty in the casting of the blades is: If the distance between them is small, the molding sand is heated and baked rapidly during the pouring and solidification process, which is prone t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/02B22C1/18B22C1/24B22C1/22B22C1/02B22D27/04
CPCB22C9/22B22C1/02B22C1/18B22C1/181B22C1/22B22C1/24B22C9/02B22D27/04
Inventor 唐庆伟周黎明蒋波
Owner HANGZHOU STEAM TURBINE CASTING & FORGING
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