CN103008531A - Special paint for evaporative pattern cast iron and manufacturing method of special paint - Google Patents

Special paint for evaporative pattern cast iron and manufacturing method of special paint Download PDF

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Publication number
CN103008531A
CN103008531A CN 201210562530 CN201210562530A CN103008531A CN 103008531 A CN103008531 A CN 103008531A CN 201210562530 CN201210562530 CN 201210562530 CN 201210562530 A CN201210562530 A CN 201210562530A CN 103008531 A CN103008531 A CN 103008531A
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CN
China
Prior art keywords
parts
powder
coating
cast iron
lost foam
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Pending
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CN 201210562530
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Chinese (zh)
Inventor
孙月英
王燕
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Anhui Zhongxing Huahan Machinery Co Ltd
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Anhui Zhongxing Huahan Machinery Co Ltd
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Priority to CN 201210562530 priority Critical patent/CN103008531A/en
Publication of CN103008531A publication Critical patent/CN103008531A/en
Pending legal-status Critical Current

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Abstract

The invention relates to special paint for evaporative pattern cast iron and a manufacturing method of the special paint. The special paint comprises the following components: 45-55 parts of bauxite, 30-35 parts of spar powder, 3-7 parts of mica powder, 10-14 parts of kieselguhr, 1-2 parts of attapulgite, 1.5-2.5 parts of sodium bentonite, 1-2 parts of meerschaum, 1.5-2.5 parts of artificial starch, 0.05-0.1 part of hydroxyethyl cellulose, 2-4 parts of emulsion powder, 0.2-0.4 parts of sodium carbonate, 0.1-0.3 part of antifoaming agent, 0.1-0.3 part of surfactant and water with the weight accounting for 35-45% of the total weight of the other components. The thickness of a single coated coating of the paint is between 0.55mm and 0.7mm; and coating can ensure no flowing, and prevent exposure of a facade and cracks of a corner. The coating with the appropriate thickness is good in air permeability, and the paint is particularly suitable for castings with complicated inner cores, such as thin-wall gray iron castings with complicated inner cavities, like an engine body, a cylinder cover and a vent pipe.

Description

The special coating of lost foam cast iron and manufacture method thereof
Technical field
The present invention relates to a kind of coating and manufacture method thereof, especially for special coating and the manufacture method thereof of lost foam cast iron.
Background technology
Traditional cast paint just plays in the middle of foundry goods and casting mold and stops buffer action, reach antiseized Grains, but under the conventional cast coating high temperature since poor adhesive force, intensity low, fire-resistant poor, gas forming amount is large, causes easily foundry goods to produce the defectives such as scab, sand holes, pore, carbon slag.Foundry goods scab is because coating does not effectively play and stops buffer action, or coating and high temperature metal liquid generation chemical reaction.
Lost foam paint is the separation layer between molding sand and the foam mould, and the refractory material that coating is used is thinner, and the thicker foundry goods of coating just is not easy scab.But thick coating, materials carefully can make the gas permeability degradation of coating, direct result be foam mould gasification product be difficult to smoothly from coating get rid of a part of liquefied substance also be difficult to from coating effusion can cause cry incessantly, the defective such as cold shut.When pouring cast part, produce the defectives such as carbon distribution, carbon black because of cast iron phosphorus content Gao Gengyi.Therefore to guarantee certain coating layer thickness, guarantee again that coating has through gas and sees through the foam mould to be subjected to thermogenetic liquid product, prevent carbon black.
The uniformity of this external coating is also most important, and external most of paint thixotropies bad (referring to stressed, stirring, shear shinning) easily trickling make cast(ing) surface coating thickness inhomogeneous, even the trickling of part facade exposes Bai Mo, also need to mend swabbing.Produce accumulation at corner location and cause coating cracking.So need to develop a kind of special iron casting coating.Require once to be coated with the coating layer thickness that can reach between the 0.55mm-0.7mm.Being coated with is can guarantee not trickle, and prevents that facade from showing money or valuables one carries unintentionally, the turning cracking.Suitable coating layer thickness has good gas permeability, is particularly suitable for the foundry goods of complicated inner core.Such as the thin gray iron casting of the complicated wall of the inner chambers such as engine body, cylinder cap, blast pipe.
Summary of the invention
The application's goal of the invention is to overcome the shortcoming of existing conventional cast coating, and a kind of special coating and manufacture method thereof of lost foam cast iron are provided.
In order to finish the application's goal of the invention, the application by the following technical solutions:
The special coating of a kind of lost foam cast iron of the present invention, wherein: it contains: artificial starch, 0.05-0.1 part hydroxyethylcellulose, 2-4 part latex powder, 0.2-0.4 part sodium carbonate, 0.1-0.3 part defoamer and 0.1-0.3 part surfactant of the mica powder of the bauxite of 45-55 part, 30-35 part spar powder, 3-7 part, the diatomite of 10-14 part, 1-2 part attapulgite, 1.5-2.5 part sodium bentonite, 1-2 part sepiolite, 1.5-2.5 part, and occupy the water of the 35-45% of mentioned component gross weight;
The special coating of a kind of lost foam cast iron of the present invention, wherein: it contains: 50 parts bauxite, 33 parts of spar powder, 5 parts mica powder, 12 parts diatomite, 1.5 parts of attapulgites, 2 parts of sodium bentonites, 1.5 parts of sepiolites, 2 parts artificial starch, 0.1 part of hydroxyethylcellulose, 3 parts of latex powder, 0.3 part of sodium carbonate, 0.2 part of defoamer and 0.2 part of surfactant;
The special coating of a kind of lost foam cast iron of the present invention, wherein: described defoamer can be tributyl phosphate; Described surfactant can be dodecyl sodium sulfate;
The special coating of a kind of lost foam cast iron of the present invention, wherein: described bauxite contains the aluminium oxide of 40-70% and the silica of 30-60%;
A kind of method of producing the special coating of lost foam cast iron, wherein: it may further comprise the steps:
(1) diatomite in powder of the mica powder of the bauxite of 45-55 part, 30-35 part spar powder, 3-7 part, 10-14 part being broken into granularity is that 170-255 order particles are put into the machine of closing that stirs, and then artificial starch, 0.05-0.1 part hydroxyethylcellulose, 2-4 part latex powder, 0.2-0.4 part sodium carbonate, 0.1-0.3 part defoamer and 0.1-0.3 part surfactant of 1-2 part attapulgite, 1.5-2.5 part sodium bentonite, 1-2 part sepiolite, 1.5-2.5 part put into stir the machine of closing and stir evenly, namely obtain powder-type coating, stand-by after the packing;
First water is put into mixer when (2) using, and then above-mentioned compound is put into mixer carry out high-speed stirred, the largest circumference tangential velocity of mixer is 800-1800 m/min, stirs after 20-30 minute; Mixer turns-200 rev/mins stirring at low speed 2.5-3.5 hour with 60, and the gas in the above-mentioned compound is removed, and has namely obtained the special coating of lost foam cast iron;
The special coating of a kind of lost foam cast iron of the present invention, wherein: in step (1) 50 parts bauxite, 33 parts of kyanites, 5 parts mica powder, 12 parts diatomite in powder being broken into granularity is that 170-255 order particles are put into the machine of closing that stirs, and then 1.5 parts of attapulgites, 2 parts of sodium bentonites, 1.5 parts of sepiolites, 2 parts artificial starch, 0.1 part of hydroxyethylcellulose, 3 parts of latex powder, 0.3 part of sodium carbonate, 0.2 part of defoamer and 0.2 part of surfactant put into stir the machine of closing and stir evenly, namely obtain powder-type coating, stand-by after the packing;
The special coating of a kind of lost foam cast iron of the present invention, wherein: the largest circumference tangential velocity at the process high speed mixer of step (2) is 1800 m/mins.
The special coating of lost foam cast iron of the present invention is compared with traditional cast paint and is had the following advantages:
1, bauxite powder and diatomite in powder have the pore of running through in the aggregate, and good gas permeability is arranged, and are conducive to the suspension of coating.The spar powder is conducive to coating shelling performance, mica powder in the form of sheets, sliding is conducive to prevent well paint cracks, can form sinter layer and be conducive to shelling.
2, in suspending agent and the bonding agent, attapulgite, sepiolite are fibre structure and are conducive to coating suspension and are coated with.Sodium bentonite is met water and is significantly expanded, and improves suspension and guarantees coating layer thickness.Artificial starch and hydroxyethylcellulose are macromolecular compounds, and they all are that organic matter is identical but stronger with other inorganic compound effects.
3, latex powder is organic adhesive, and sodium carbonate is strong basicity, is conducive to coating suspension and is coated with.
4, the anti-corrosive properties of coating are good.Coating is paste, add after the water high-speed stirred with stirring at low speed mix well degassed with emulsion change into powdered resin the powder coatings.
The specific embodiment
The special coating of a kind of lost foam cast iron of the present invention contains: the artificial starch of the mica powder of the bauxite of 45-55 part, 30-35 part kyanite, 3-7 part, the diatomite of 10-14 part, 1-2 part attapulgite, 1.5-2.5 part sodium bentonite, 1-2 part sepiolite, 1.5-2.5 part, 0.05-0.1 part hydroxyethylcellulose, 2-4 part latex powder, 0.2-0.4 part acid sodium, 0.1-0.3 part defoamer and 0.1-0.3 part surfactant, and occupy the water of the 35-45% of mentioned component gross weight.Preferably it contains: 50 parts bauxite, 33 parts of spar powder, 5 parts mica powder, 12 parts diatomite, 1.5 parts of attapulgites, 2 parts of sodium bentonites, 1.5 parts of sepiolites, 2 parts artificial starch, 0.1 part of hydroxyethylcellulose, 3 parts of latex powder, 0.3 part of sodium carbonate, 0.2 part of defoamer and 0.2 part of surfactant.
Defoamer can be tributyl phosphate; Surfactant can be dodecyl sodium sulfate.Bauxite contains the aluminium oxide of 40-70% and the silica of 30-60%.
A kind of method of producing the special coating of lost foam cast iron, it may further comprise the steps:
(1) diatomite in powder of the mica powder of the bauxite of 45-55 part, 30-35 part spar powder, 3-7 part, 10-14 part being broken into granularity is that 170-255 order particle is put into the machine of closing that stirs, and then artificial starch, 0.05-0.1 part hydroxyethylcellulose, 2-4 part latex powder, 0.2-0.4 part sodium carbonate, 0.1-0.3 part defoamer and 0.1-0.3 part surfactant of 1-2 part attapulgite, 1.5-2.5 part sodium bentonite, 1-2 part sepiolite, 1.5-2.5 part put into stir the machine of closing and stir evenly, namely obtain powder-type coating, stand-by after the packing;
First water is put into mixer when (2) using, and then above-mentioned compound is put into mixer carry out high-speed stirred, the largest circumference tangential velocity of mixer is 800-1800 m/min, and preferably the largest circumference tangential velocity of mixer is 1800 m/mins, stirs after 20-30 minute; Mixer turns-200 rev/mins stirring at low speed 2.5-3.5 hour with 60, and the gas in the above-mentioned compound is removed, and has namely obtained the special coating of lost foam cast iron.
This coating once is coated with coating layer thickness between 0.55mm-0.7mm, and being coated with is can guarantee not trickle, and prevents that facade from showing money or valuables one carries unintentionally, the turning cracking.Suitable coating layer thickness has good gas permeability, is particularly suitable for the foundry goods of complicated inner core.Such as engine body, cylinder cap, the thin gray iron casting of the complicated wall of blast pipe inner chamber.
At high temperature do not ftracture, do not come off, intensity is high, and can effectively prevent the high-temp liquid burning, with chemically reactive not in casting mold and the high-temp liquid Metal Contact process.Simultaneously can prevent the generation of the gases such as nitrogen, sulphur, carbon, thereby thoroughly solve the problem of ironcasting scab.
More than describing is explanation of the invention, is not that limited range of the present invention is referring to claim to the restriction of invention, and in the situation of spirit of the present invention, the present invention can do any type of modification.

Claims (9)

1. the special coating of a lost foam cast iron, it is characterized in that it contains: artificial starch, 0.05-0.1 part hydroxyethylcellulose, 2-4 part latex powder, 0.2-0.4 part sodium carbonate, 0.1-0.3 part defoamer and 0.1-0.3 part surfactant of the mica powder of the bauxite of 45-55 part, 30-35 part spar powder, 3-7 part, the diatomite of 10-14 part, 1-2 part attapulgite, 1.5-2.5 part sodium bentonite, 1-2 part sepiolite, 1.5-2.5 part, and occupy the water of the 35-45% of mentioned component gross weight.
2. the special coating of lost foam cast iron as claimed in claim 1, it is characterized in that: it contains: 50 parts bauxite, 33 parts of spar powder, 5 parts mica powder, 12 parts diatomite, 1.5 parts of attapulgites, 2 parts of sodium bentonites, 1.5 parts of sepiolites, 2 parts artificial starch, 0.1 part of hydroxyethylcellulose, 3 parts of latex powder, 0.3 part of tertiary sodium phosphate, 0.2 part of defoamer and 0.2 part of surfactant.
3. the special coating of lost foam cast iron as claimed in claim 1 or 2, it is characterized in that: described defoamer is tributyl phosphate; Described surfactant is dodecyl sodium sulfate.
4. the special coating of lost foam cast iron as claimed in claim 3, it is characterized in that: described bauxite contains the aluminium oxide of 40-70% and the silica of 30-60%.
5. method of producing the special coating of lost foam cast iron claimed in claim 1, it is characterized in that: it may further comprise the steps:
(1) diatomite in powder of the mica powder of the bauxite of 45-55 part, 30-35 part spar powder, 3-7 part, 10-14 part being broken into granularity is that 170-255 order particle is put into the machine of closing that stirs, and then artificial starch, 0.05-0.1 part hydroxyethylcellulose, 2-4 part latex powder, 0.2-0.4 part sodium carbonate, 0.1-0.3 part defoamer and 0.1-0.3 part surfactant of 1-2 part attapulgite, 1.5-2.5 part sodium bentonite, 1-2 part sepiolite, 1.5-2.5 part put into stir the machine of closing and stir evenly, namely obtain powder-type coating, stand-by after the packing;
First water is put into mixer when (2) using, and then above-mentioned compound is put into mixer carry out high-speed stirred, the largest circumference tangential velocity of mixer is 800-1800 m/min, stirs after 20-30 minute; Mixer turns-200 rev/mins stirring at low speed 2.5-3.5 hour with 60, and the gas in the above-mentioned compound is removed, and has namely obtained the special coating of lost foam cast iron.
6. method as claimed in claim 5, it is characterized in that: in step (1) 50 parts bauxite, 33 parts of spar powder, 5 parts mica powder, 12 parts diatomite in powder being broken into granularity is that 170-255 order particle is put into the machine of closing that stirs, and then 1.5 parts of attapulgites, 2 parts of sodium bentonites, 1.5 parts of sepiolites, 2 parts artificial starch, 0.1 part of hydroxyethylcellulose, 3 parts of latex powder, 0.3 part of sodium carbonate, 0.2 part of defoamer and 0.2 part of surfactant put into stir the machine of closing and stir evenly, namely obtain powder-type coating, stand-by after the packing.
7. such as the special coating of claim 5 or 6 described lost foam cast irons, it is characterized in that: described defoamer is tributyl phosphate; Described surfactant can be dodecyl sodium sulfate.
8. the special coating of lost foam cast iron as claimed in claim 7, it is characterized in that: described bauxite contains the aluminium oxide of 40-70% and the silica of 30-60%.
9. method as claimed in claim 5 is characterized in that: the largest circumference tangential velocity at the process high speed mixer of step (2) is 1800 m/mins.
CN 201210562530 2012-12-21 2012-12-21 Special paint for evaporative pattern cast iron and manufacturing method of special paint Pending CN103008531A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706757A (en) * 2013-12-26 2014-04-09 南昌航空大学 Magnesium alloy evaporative pattern casting coating and preparation method thereof
CN105344922A (en) * 2015-10-26 2016-02-24 无锡市永亿精密铸造有限公司 Primary layer coating for airplane blade precise coating
CN105382178A (en) * 2015-11-05 2016-03-09 埃维柯精密铸造(安徽)有限公司 Formula of paint for lost foam spheroidal graphite cast iron and processing method of paint
CN105522104A (en) * 2016-01-19 2016-04-27 安徽涌畅铸件有限公司 Expendable mold coating and preparation process thereof
CN106270372A (en) * 2016-09-20 2017-01-04 桃江新兴管件有限责任公司 A kind of cast iron lost foam paint and preparation method thereof
CN106424541A (en) * 2016-11-04 2017-02-22 南京工程学院 Water-based paint for expendable pattern cast steel and preparing method thereof
CN107052227A (en) * 2017-02-16 2017-08-18 桃江新兴管件有限责任公司 A kind of light-wall pipe lost foam paint and its preparation method and application
CN107052243A (en) * 2016-12-28 2017-08-18 桃江新兴管件有限责任公司 A kind of cast iron lost foam casting process
CN107511450A (en) * 2017-09-18 2017-12-26 桂林中铸机械科技有限公司 The coating agent of top layer casting abrasion resistant particles layer during evaporative pattern cast casting
CN108165096A (en) * 2017-12-06 2018-06-15 安徽金达节能材料发展有限公司 A kind of heat insulation type aluminium alloy heat-resisting paint
CN108927489A (en) * 2018-08-16 2018-12-04 界首市天龙消防器材有限责任公司 A kind of improved method promoting lost foam casting precision
CN109641261A (en) * 2016-06-30 2019-04-16 胡坦斯·阿尔伯图斯化学厂有限公司 In the mold wash component for being used to manufacture mold coating on iron casting and the non-permanent mold or type core of steel casting
CN110744004A (en) * 2019-11-26 2020-02-04 三门峡阳光铸材有限公司 Novel lost foam coating prepared from industrial waste residues

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706757A (en) * 2013-12-26 2014-04-09 南昌航空大学 Magnesium alloy evaporative pattern casting coating and preparation method thereof
CN103706757B (en) * 2013-12-26 2015-07-08 南昌航空大学 Magnesium alloy evaporative pattern casting coating and preparation method thereof
CN105344922A (en) * 2015-10-26 2016-02-24 无锡市永亿精密铸造有限公司 Primary layer coating for airplane blade precise coating
CN105382178A (en) * 2015-11-05 2016-03-09 埃维柯精密铸造(安徽)有限公司 Formula of paint for lost foam spheroidal graphite cast iron and processing method of paint
CN105522104A (en) * 2016-01-19 2016-04-27 安徽涌畅铸件有限公司 Expendable mold coating and preparation process thereof
CN109641261A (en) * 2016-06-30 2019-04-16 胡坦斯·阿尔伯图斯化学厂有限公司 In the mold wash component for being used to manufacture mold coating on iron casting and the non-permanent mold or type core of steel casting
US11027328B2 (en) 2016-06-30 2021-06-08 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Refractory coating composition for making facings on temporary molds or on cores for iron and steel casting operations
CN106270372A (en) * 2016-09-20 2017-01-04 桃江新兴管件有限责任公司 A kind of cast iron lost foam paint and preparation method thereof
CN106270372B (en) * 2016-09-20 2018-09-28 桃江新兴管件有限责任公司 A kind of cast iron lost foam paint and preparation method thereof
CN106424541B (en) * 2016-11-04 2019-01-18 南京工程学院 A kind of water-based coating for lost foam cast steel and preparation method thereof
CN106424541A (en) * 2016-11-04 2017-02-22 南京工程学院 Water-based paint for expendable pattern cast steel and preparing method thereof
CN107052243A (en) * 2016-12-28 2017-08-18 桃江新兴管件有限责任公司 A kind of cast iron lost foam casting process
CN107052243B (en) * 2016-12-28 2019-02-15 桃江新兴管件有限责任公司 A kind of cast iron lost foam casting process
CN107052227A (en) * 2017-02-16 2017-08-18 桃江新兴管件有限责任公司 A kind of light-wall pipe lost foam paint and its preparation method and application
CN107511450A (en) * 2017-09-18 2017-12-26 桂林中铸机械科技有限公司 The coating agent of top layer casting abrasion resistant particles layer during evaporative pattern cast casting
CN107511450B (en) * 2017-09-18 2019-07-05 桂林中铸机械科技有限公司 The coating agent of surface layer casting abrasion resistant particles layer when evaporative pattern cast casting
CN108165096A (en) * 2017-12-06 2018-06-15 安徽金达节能材料发展有限公司 A kind of heat insulation type aluminium alloy heat-resisting paint
CN108927489A (en) * 2018-08-16 2018-12-04 界首市天龙消防器材有限责任公司 A kind of improved method promoting lost foam casting precision
CN108927489B (en) * 2018-08-16 2020-08-11 界首市天龙消防器材有限责任公司 Improved method for improving lost foam casting manufacturing precision
CN110744004A (en) * 2019-11-26 2020-02-04 三门峡阳光铸材有限公司 Novel lost foam coating prepared from industrial waste residues

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