Water-based environment-friendly paint used for lost foam casting mold for brass casting and preparation method of water-based environment-friendly paint

A technology of brass casting and environmentally friendly coatings, applied in casting molding equipment, coatings, casting molds, etc., can solve problems such as poor air permeability, and achieve the effects of good coating, improved suspension performance, and strong covering ability

Inactive Publication Date: 2019-12-20
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved by the present invention: Aiming at the shortcomings of poor air permeability when the lost foam coating is applied to flavonoid lost foam casting, the present invention provides a water-based environmental protection coating for brass casting lost foam, which can prevent holes while improving air permeability. Cracks and marks

Method used

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  • Water-based environment-friendly paint used for lost foam casting mold for brass casting and preparation method of water-based environment-friendly paint
  • Water-based environment-friendly paint used for lost foam casting mold for brass casting and preparation method of water-based environment-friendly paint
  • Water-based environment-friendly paint used for lost foam casting mold for brass casting and preparation method of water-based environment-friendly paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Prepare brass casting lost foam water-based environmental protection coating as follows:

[0028] 1. Preparation of raw materials:

[0029] Prepare porous glass-ceramics as follows:

[0030] (1) raw material waste glass, blowing agent NaCO 3 , SiC and sintering aid V 2 o 5 Mix according to the weight ratio of 85:7:5:3, then grind and pass through a 120 mesh sieve;

[0031] (2) Spread the mixed powder into a mold made of ceramic fiber paper, put it into a muffle furnace for programmed heating, and dry it in an environment of 480K for 2 hours;

[0032] (3) Then raise the temperature to 1173K at a rate of 20K / min and keep it for 30min, then raise the temperature to 1453K at a rate of 20K / min and keep it for 30min to obtain porous glass-ceramics. Porous glass-ceramics have a pore size of 0.58 to 6.22 microns.

[0033] 30 parts by weight of diatomite powder, 50 parts by weight of talc powder and 150 parts by weight of porous glass-ceramic powder are groun...

Embodiment 2

[0049] Embodiment 2: Prepare brass casting lost foam water-based environmental protection coating as follows:

[0050] 1. Preparation of raw materials:

[0051] Prepare porous glass-ceramics as follows:

[0052] (1) raw material waste glass, blowing agent NaCO 3 , SiC and sintering aid V 2 o 5 Mix according to the weight ratio of 90:3:4:3, then grind, and pass through a 150-mesh sieve;

[0053] (2) Spread the mixed powder into a mold made of ceramic fiber paper, put it into a muffle furnace for programmed heating, and dry it in an environment of 480K for 2 hours;

[0054] (3) Then raise the temperature to 1173K at a rate of 20K / min and keep it for 30min, then raise the temperature to 1453K at a rate of 20K / min and keep it for 30min to obtain porous glass-ceramics. Porous glass-ceramics have a pore size of 2.35 to 5.69 microns.

[0055] 50 parts by weight of diatomite powder, 70 parts by weight of talc powder and 250 parts by weight of porous glass-ceramic powder are grou...

Embodiment 3

[0058] Embodiment 3: Prepare brass casting lost foam water-based environmental protection coating as follows:

[0059] 1. Preparation of raw materials:

[0060] Prepare porous glass-ceramics as follows:

[0061] (1) raw material waste glass, blowing agent NaCO 3 , SiC and sintering aid V 2 o 5 Mix according to the weight ratio of 86:4:5:5, then grind, and pass through a 200-mesh sieve;

[0062] (2) Spread the mixed powder into a mold made of ceramic fiber paper, put it into a muffle furnace for programmed heating, and dry it in an environment of 480K for 2 hours;

[0063] (3) Then raise the temperature to 1173K at a rate of 20K / min and keep it for 30min, then raise the temperature to 1453K at a rate of 20K / min and keep it for 30min to obtain porous glass-ceramics. Porous glass-ceramics have a pore size of 1.11 to 3.54 microns.

[0064] 40 parts by weight of diatomite powder, 60 parts by weight of talc powder and 200 parts by weight of porous glass-ceramic powder are grou...

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Abstract

The invention discloses water-based environment-friendly paint used for a lost foam casting mold for brass casting and a preparation method of the water-based environment-friendly paint. The water-based environment-friendly paint is prepared from, by weight, 100 parts of refractory powder, 4-6 parts of sodium bentonite, 0.3 part of CMC, 6-9 parts of silica sol, 0.5 part of polyacrylamide, 0.2 partof xanthan gum, 60-80 parts of water, 1-5 parts of a wetting dispersant, 0.2-0.8 part of a defoaming agent, and 0.1-1 part of a corrosion remover. According to the water-based environment-friendly paint used for the lost foam casting mold for brass casting and the preparation method of the water-based environment-friendly paint, porous glass ceramic is used for preparing the refractory powder sothat the gas-liquid permeability of a coating can be effectively improved; water is used as carrier liquid and does not contain any hazardous substance, and the refractory powder is easy to suspend and good in coating performance, so that the phenomenon of sand adhesion on the surface of a casting can be obviously reduced; and after the paint is dried, the coating is smooth, flat, free of brush marks, cracks and bubble defects and high in strength.

Description

technical field [0001] The invention relates to the technical field of brass casting lost foam coatings, in particular to a brass casting lost foam water-based environmental protection coating and a preparation method thereof. Background technique [0002] Lost foam coatings are generally prepared from refractory aggregates, suspending agents, binders, carriers, additives, etc., but due to different requirements, the selection and proportion of materials will also vary. Among them, the particle shape, particle size, binder type, temperature and other factors of the aggregate will affect the air permeability of the lost foam casting. The more uneven the particle shape, the better the air permeability, but if the particle size is too coarse, it will affect the process performance of the coating. Therefore, the particle size of the lost foam casting aggregate for casting brass is generally above 200 mesh; under the premise of ensuring high temperature strength and high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22C9/04
CPCB22C3/00B22C9/04
Inventor 柴知章张继东藏影
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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