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A kind of production method of water-based flow coating coating for cast iron

A production method, water-based technology, applied in the direction of coating, casting mold, casting mold composition, etc., can solve the problems of deteriorating safety production conditions, poisonous methanol, prone to safety accidents, etc., and achieve good permeability and leveling properties Defoaming effect, ensuring low temperature and high temperature strength, improving the effect of anti-sticking sand performance

Active Publication Date: 2016-11-23
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, alcohol-based coatings have the characteristics of quick ignition and low consumption of working hours, etc., but there are the following problems: methanol is toxic and has a strong irritant to the human optic nerve, and long-term exposure of workers can easily lead to blindness; although ethanol is non-toxic and odorless, However, methanol and methanol are Class A dangerous goods that are volatile, flammable and explosive. Safety accidents are prone to occur during the production, transportation, storage and use of coatings, which is not convenient for long-distance transportation and storage of products, and deteriorates safety production conditions; alcohol-based coatings The suspension stability is poor, there is no time thixotropy, the brush mark is serious when brushing, and it is difficult to level, and the organic components in it will produce toxic gas when the metal liquid is poured, and the amount of gas is large, and the casting is prone to pore defects. Pollution of the working environment, affecting the health of workers
The biggest feature of flow coating and dip coating is low viscosity and low solid content, but it is difficult to meet the requirements of flow coating and dip coating only by using the existing formula of brush coating and adjusting its viscosity. Suspension, rheology, sand resistance and many other requirements
[0004] So far there is no way to overcome the above drawbacks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: a kind of production method of cast iron water-based flow coating, the method comprises the steps:

[0026] a. Bentonite and silicate pretreatment: mix bentonite and silicate with water at 1:6 under stirring, completely disperse evenly, and let stand for 12-24 hours to prepare pretreated bentonite slurry;

[0027] b. Pretreatment of PVA: Weigh 4 times the quality of PVA in the bucket, slowly add PVA under the condition of stirring, then fully stir until it is completely dissolved, and filter with a sieve to prepare and use immediately;

[0028] c. Add 4 / 5 of the total water and treated bentonite slurry into the dispersion kettle, start stirring, then add defoamer, surfactant, thickener, flux, and finally add the pretreated PVA solution, Stir for 10-15 minutes;

[0029] d. Adjust the stirring speed to 500-600r / min, and pour bauxite, mullite, quartz powder, flake graphite, and brown corundum into the dispersion kettle in sequence. After feeding, adjust th...

Embodiment 2

[0033] Embodiment two: a kind of production method of cast iron water-based flow coating, the method comprises the steps:

[0034] a. Bentonite and silicate pretreatment: mix bentonite and silicate with water at 1:6 under stirring, completely disperse evenly, and let stand for 12-24 hours to prepare pretreated bentonite slurry;

[0035] b. Pretreatment of PVA: Weigh 4 times the quality of PVA in the bucket, slowly add PVA under the condition of stirring, then fully stir until it is completely dissolved, and filter with a sieve to prepare and use immediately;

[0036] c. Add 4 / 5 of the total water and treated bentonite slurry into the dispersion kettle, start stirring, then add defoamer, surfactant, thickener, flux, and finally add the pretreated PVA solution, Stir for 10-15 minutes;

[0037] d. Adjust the stirring speed to 500-600r / min, and pour bauxite, mullite, quartz powder, flake graphite, and brown corundum into the dispersion kettle in sequence. After feeding, adjust th...

Embodiment 3

[0041] Embodiment three: a kind of production method of cast iron water-based flow coating, the method comprises the steps:

[0042] a. Bentonite and silicate pretreatment: mix bentonite and silicate with water at 1:6 under stirring, completely disperse evenly, and let stand for 12-24 hours to prepare pretreated bentonite slurry;

[0043] b. Pretreatment of PVA: Weigh 4 times the quality of PVA in the bucket, slowly add PVA under the condition of stirring, then fully stir until it is completely dissolved, and filter with a sieve to prepare and use immediately;

[0044] c. Add 4 / 5 of the total water and treated bentonite slurry into the dispersion kettle, start stirring, then add defoamer, surfactant, thickener, flux, and finally add the pretreated PVA solution, Stir for 10-15 minutes;

[0045] d. Adjust the stirring speed to 500-600r / min, and pour bauxite, mullite, quartz powder, flake graphite, and brown corundum into the dispersion kettle in sequence. After feeding, adjust th...

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PUM

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Abstract

The present invention relates to a production process of paint, in particular to a production method of water-based flow-coating paint for cast iron, characterized in that: the method comprises pretreatment of bentonite and silicate, pretreatment of PVA, and pouring into a dispersion tank Add 4 / 5 of the total water and treated bentonite slurry, start stirring, then add defoamer, surfactant, thickener, flux, and finally add the pretreated PVA solution, stir, and pour into the dispersion tank Bauxite, mullite, quartz powder, flake graphite, brown corundum in turn, adjust the speed and disperse after the feeding is completed; adjust the Baume degree with water; the process of the invention is unique, with superior fluidity and good leveling , Suspension stability, heat cracking resistance, high temperature stability, sand sticking resistance, low gas generation and good defoaming effect, no pollution, high efficiency.

Description

technical field [0001] The invention relates to a production process of paint, in particular to a production method of water-based flow coating for cast iron. Background technique [0002] At present, there are many kinds of casting coatings, but they can be divided into two categories according to the solvents used: alcohol-based coatings and water-based coatings. Among them, alcohol-based coatings have the characteristics of quick ignition and low consumption of working hours, etc., but there are the following problems: methanol is toxic and has a strong irritant to the human optic nerve, and long-term exposure of workers can easily lead to blindness; although ethanol is non-toxic and odorless, However, methanol and methanol are Class A dangerous goods that are volatile, flammable and explosive. Safety accidents are prone to occur during the production, transportation, storage and use of coatings, which is not convenient for long-distance transportation and storage of prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
Inventor 李天才陈学更韩文
Owner 共享新材料(山东)有限公司
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