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Coating used for automation line shell making and preparation method and adjusting method thereof

An automatic line and coating technology, applied in the direction of coating, manufacturing tools, casting molding equipment, etc., can solve the problems of long and short shell-making cycle, generally only one to two months, long drying time, etc., to achieve the shell-making cycle Short, good application prospects, short drying time

Active Publication Date: 2019-11-19
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the binders used in domestic investment casting automatic wire shell making are almost all alkaline silica sol, and the refractory material is kaolin clinker. months, and the coating takes a long time to dry between layers after shell making, and the shell making cycle is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation method of a kind of investment casting shell coating of the present invention comprises the following steps,

[0030] Step 1. Weigh the acidic quick-drying silica sol, zircon powder and penetrant T according to the ratio of 1kg: (3-5) kg: (4.5-6) ​​ml. The penetrant T is a wetting agent, and the acidic quick-drying Silica sol is obtained by the way customized by the manufacturer, SiO 2 The mass fraction of the silica sol is 24% to 27%, the pH of the acidic quick-drying silica sol is 4 to 5, and the SiO 2 The particle size is 8-20nm; and the zircon powder is also obtained by the manufacturer's custom method, in which ZrO 2 The mass fraction of Al is 64%~65.5%, Al 2 o 3 The mass fraction of ≤1.0%, Fe 2 o 3 Mass fraction ≤ 1.0%, TiO 2 The mass fraction of the particle size is ≤0.3%, the mass fraction of the particle size greater than 75 μm is 0.5% to 1.2%, the mass fraction of the particle size greater than 53 μm is 5.0% to 10.0%, and the mass fractio...

Embodiment 1

[0045] Configuration, adjustment and renewal of a guide vane transition layer coating

[0046] The configuration method includes the following steps,

[0047] Step 1, weigh the acidic quick-drying silica sol, zircon powder and penetrating agent T according to the ratio of 1kg: 5kg: 6ml, and the SiO in the acidic quick-drying silica sol 2 The mass fraction of the silica sol is 24% to 27%, the pH of the acidic quick-drying silica sol is 4 to 5, and the SiO 2 The particle size of ZrO in zircon powder is 8-20nm; 2 The mass fraction of Al is 64%~65.5%, Al 2 o 3 The mass fraction of ≤1.0%, Fe 2 o 3 Mass fraction ≤ 1.0%, TiO 2 The mass fraction of the particle size is ≤0.3%, the mass fraction of the particle size greater than 75 μm is 0.5% to 1.2%, the mass fraction of the particle size greater than 53 μm is 5.0% to 10.0%, and the mass fraction of the particle size greater than 45 μm is 12.0% to 17.0%;

[0048] Step 2, sequentially pour the weighed acidic quick-drying silica s...

Embodiment 2

[0061] The configuration, adjustment and renewal of the paint for a certain working blade reinforcement layer

[0062] The configuration method includes the following steps,

[0063] Step 1, weigh the acidic quick-drying silica sol, zircon powder and penetrant T in the ratio of 1kg: 4kg: 5.5ml, and the SiO in the acidic quick-drying silica sol 2 The mass fraction of the silica sol is 24% to 27%, the pH of the acidic quick-drying silica sol is 4 to 5, and the SiO 2 The particle size of ZrO in zircon powder is 8-20nm; 2 The mass fraction of Al is 64%~65.5%, Al 2 o 3 The mass fraction of ≤1.0%, Fe 2 o 3 Mass fraction ≤ 1.0%, TiO 2 The mass fraction of the particle size is ≤0.3%, the mass fraction of the particle size greater than 75 μm is 0.5% to 1.2%, the mass fraction of the particle size greater than 53 μm is 5.0% to 10.0%, and the mass fraction of the particle size greater than 45 μm is 12.0% to 17.0%;

[0064] Step 2, sequentially pour the weighed acidic quick-drying ...

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Abstract

The invention discloses a coating used for automation line shell making and a preparation method and adjusting method thereof. According to components of the coating, the ratio of the mass of acid quick-drying silica sol to the mass of zircon powder to the volume of a wetting agent is 1kg: (3-5) kg: (4.5-6) ml. The method comprises the steps that firstly, the zircon powder is added after the acidquick-drying silica sol and the wetting agent are uniformly mixed according to the ratio; secondly, stirring is performed for 3-8 min at the speed being 1000-1500 rad / min, and then stirring is performed for 10-20 min at the speed being2500-3500 rad / min; and thirdly, stirring is performed uninterruptedly to obtain the coating. According to the adjusting method, the viscosity of the coating is decreased by adding distilled water and the acid quick-drying silica sol and increased through evaporation of the coating, and the SiO2 content in the coating is adjusted by adding the distilled water or the acid quick-drying silica sol. The guarantee period of the coating is long, the interlayer drying time is short after shell making, and the shell making period is short.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a coating for automatic wire shell making, a preparation method and an adjustment method thereof. Background technique [0002] Investment casting is to use investment materials to make investment samples and form modules, and then paint on the surface of the modules. After the coating is dry and solidified, the modules are heated to melt out the mold materials to form hollow shells. The hollow shells are subjected to high temperature After sintering, the metal liquid is poured, and after the metal liquid is solidified, the shell is cleaned to obtain a casting. Usually the investment material is made of waxy material, and the coating is made of refractory material. [0003] At present, the binders used in domestic investment casting automatic line shell making are almost all alkaline silica sol, and the refractory material is kaolin clinker. months, and the drying ti...

Claims

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Application Information

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IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 孙礼娜常涛岐刘晓飞陈波马李朝许言海潮李新站
Owner AECC AVIATION POWER CO LTD
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