A coating for automatic wire shell making and its preparation method and adjustment method

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: 2021-03-30
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 method for preparing coating with a coating of a molten casting shell is comprised of the following steps.

[0030]Step 1, the acid-dry silica sol, zirconium powder and the penetrant T press 1 kg: (3 ~ 5) kg: (4.5 ~ 6) mL, wherein the osmotic T is a wetting agent, and the acidity is dry. Silica sol is customized by manufacturers, SiO2The mass fraction is 24% ~ 27%, the pH of the acid-dry silica sol is 4 ~ 5, SiO2The particle size is 8 ~ 20 nm; zirconium powder is also customized by the manufacturer, where Zro2The mass fraction is 64% ~ 65.5%, Al2O3Quality score ≤1.0%, Fe2O3Quality score ≤1.0%, TIO2The mass fraction is ≤0.3%, the mass fraction of particle size of 75 μm is 0.5% to 1.2%, greater than 53 μm is 5.0% to 10.0%, greater than 45 μm particle size of 12.0% to 17.0%;

[0031]Step 2, in turn, insert the weighing acid-drying silica sol and penetrant T into the bump barrel, stirring at a rate of 1000 to 1500RAD / min using a vertical mixer at a rate of 2 to 5 min; since the pe...

Embodiment 1

[0045]Configuration, adjustment, and continuation of a transition layer coating of the leaf transition layer

[0046]The configuration method includes the following steps,

[0047]Step 1, the acid-dry silicon sol, zirconium powder and penetrant T press 1 kg: 5kg: 6ml, there is a solution of acidic and dry silica sol.2The mass fraction is 24% ~ 27%, the pH of the acid-dry silica sol is 4 ~ 5, SiO2The particle size is 8 ~ 20 nm; ZrO in zirconium powder2The mass fraction is 64% ~ 65.5%, Al2O3Quality score ≤1.0%, Fe2O3Quality score ≤1.0%, TIO2The mass fraction is ≤0.3%, the mass fraction of particle size of 75 μm is 0.5% to 1.2%, greater than 53 μm is 5.0% to 10.0%, greater than 45 μm particle size of 12.0% to 17.0%;

[0048]Step 2, in turn, insert the weighing acid-dry silicon sol and penetrant T into the bump barrel, using the vertical mixer at a rate of 1500RAD / min at a rate of 2min;

[0049]Step 3, add the weighing zirconium powder, at this time at this time at a rate of 1000rad / min, at thi...

Embodiment 2

[0061]Coating, adjustment, and continuation of a coating of a working blade reinforced layer

[0062]The configuration method includes the following steps,

[0063]Step 1, the proportion of the acid-dry silicon sol, zirconium powder and penetrant T is preferably known to 5.5 mL, in which SiO is known in which2The mass fraction is 24% ~ 27%, the pH of the acid-dry silica sol is 4 ~ 5, SiO2The particle size is 8 ~ 20 nm; ZrO in zirconium powder2The mass fraction is 64% ~ 65.5%, Al2O3Quality score ≤1.0%, Fe2O3Quality score ≤1.0%, TIO2The mass fraction is ≤0.3%, the mass fraction of particle size of 75 μm is 0.5% to 1.2%, greater than 53 μm is 5.0% to 10.0%, greater than 45 μm particle size of 12.0% to 17.0%;

[0064]Step 2, in turn, insert the weighing acid, dry silica sol and penetrant T, in the bump barrel, and stir it to stir at 1250 ARAD / min using a vertical mixer;

[0065]Step 3, add a good zirconium powder, stirred at a rate of 5 min at a rate of low speed 1250RAD / min, at this time, a un...

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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 present invention relates to the field of molten casting techniques, in particular a coating of automatic wire shell and a preparation method thereof and a adjustment method thereof.Background technique[0002]The molten casting is a molten sample with a molten material and forms a module, and then coating on the surface of the module. After the coating is dried, the module is heated and melted into the mold to form a hollow shell, hollow shell through high temperatures. After sintering, the metal liquid is poured, and the shell is cleaned after the metal liquid is solidified. Typically, the melt material is made of wax material, and the coating is refractory.[0003]At present, the binder used in China's molten casting automatic wire shell is almost all alkaline silica sol. The refractory material is a kaolin clinker, and the coating material prepared by the alkaline silica sol with the kaolin clinker is short, generally only one to two. Month, and this coating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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