CN105562591B - A kind of ingot mould coating and preparation method - Google Patents
A kind of ingot mould coating and preparation method Download PDFInfo
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- CN105562591B CN105562591B CN201610014245.9A CN201610014245A CN105562591B CN 105562591 B CN105562591 B CN 105562591B CN 201610014245 A CN201610014245 A CN 201610014245A CN 105562591 B CN105562591 B CN 105562591B
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- ingot mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of ingot mould coating and preparation methods, belong to non-ferrous metal casting technology field, the application of ingot mould surface of internal cavity when for the casting of the non-ferrous metals such as zinc, aluminium.The ingot mould coating of the present invention is by schmigel 18%~25%, titanium dioxide 5%~10%, white clay 8%~12%, sodium carboxymethylcellulose 8%~10%, calgon 5%~8%, borax 10%~15% and excess water composition.First schmigel, titanium dioxide, white clay, sodium carboxymethylcellulose, calgon are added in water of the temperature not less than 80 DEG C when ingot mould coating of the present invention, are eventually adding borax.The prepared coating is sprayed on the ingot mould surface of internal cavity that temperature is 60~80 DEG C when use.Ingot mould coating of the present invention is easy to use, can use online, uniform using non-ferrous ingots appearance lusters such as zinc, aluminium after the coating, and blackspot chromatic aberration defect is not present.
Description
Technical field
The present invention relates to a kind of ingot mould coating and preparation methods, belong to non-ferrous metal casting technology field, for zinc, aluminium
The paint spraying of ingot mould surface of internal cavity when equal non-ferrous metals casting.
Background technology
Current zinc, aluminium ingot casting mould material are mostly economical and practical cast iron materials, when founding produces ingot mould be fixed on from
Dynamic casting machine（Such as linear automatic pouring machine, disc type automatic pouring machine）On conveying mechanism, liquid metal pours into ingot mould
Crystallization process is completed by the heat dissipation of die wall in the moving process of ingot mould afterwards, when ingot mould arrival falls ingot when spindle position is set
Fall through into stacking process.Traditional cast iron quality ingot mould has the following defects in current production practices：1. liquid such as zinc, aluminium
There is preferable wetability between state metal and ingot mould, mold sticking, and ingot occurs when ingot being caused to demould often
Appearance is coarse；Temperature highest at ingot mould bottom pouring position when 2. liquid metal crystallizes, other positions temperature is relatively low, causes gold
It is uneven to belong to ingot butt portion cooling velocity, ingot casting bottom generates aberration mass defect after leading to solidification；3. liquid metal pair when cast
Ingot casting mould surface generates souring, and process of setting high-temperature fusant and ingot casting die wall chemically react, and lead to ingot mould
Erosion and corrode damage.These defects have not only seriously affected the presentation quality of the ingots such as zinc, aluminium, also shorten ingot mould
Service life increases production cost.
For these problems, people attempt to improve ingot mould material or carry out application processing to ingot casting mould surface.Such as China
Patent（Application number CN201410373850.6）A kind of composite material ingot mould is disclosed, it is in common cast iron quality ingot mould
It is 2~10 mm ceramic on metal enhancing Particles dispersed layer to cover a layer thickness by casting infiltration on surface.This ingot mould can be with
Corrosion of the zinc melt to ingot mould is prevented, but the ceramic on metal composite layer of 2~10 mm thickness leads to the cooling capacity of ingot mould
Decline, causes the productive temp of automatic pouring machine slack-off, reduce productivity；In addition between ceramic on metal composite layer and matrix
Bond strength whether disclosure satisfy that ingot mould service life require be also a non-negligible factor.Chinese patent（Shen
It please number CN201420268989）Disclose it is a kind of for producing the ingot mould of aluminium alloy ingots, it by the ingot mould of cast iron quality outside
Shell and graphite inner casing composition, use heat conduction bonding agent to combine between the two.This ingot mould connects because of casting process and liquid metal
Tactile is graphite linings, can obtain the uniform aluminium ingot of presentation quality, avoid the chromatic aberration defect of ingot casting, and cooling velocity also can
Meet the productive temp requirement of automatic pouring machine；But the intensity of graphite internal layer is low, and crackle, fracture easily occurs, causes graphite linings portion
Divide damage, influences the stability and continuity of production.
The aufbauprinciple of metallurgical furnace is used for reference, fireproof coating is painted on zinc casting ingot mould surface by people, it eliminates zinc ingot metal
Aberration and blackspot obtain the zinc ingot metal appearance of uniform color；But fireproof coating poor thermal conductivity increases zinc ingot metal/die wall interface
Thermal resistance, hence it is evident that extend setting time, production efficiency is caused to reduce；In addition the coefficient of thermal expansion of fireproof coating and common ingot mould material
The coefficient of thermal expansion difference of matter cast iron is larger, as a result causes fireproof coating that partial exfoliation occurs, and part is bonded on ingot mould and applies
Material is difficult to remove again, and it is uneven to eventually lead to ingot casting mold cavity.People use volatile paint to carry out ingot casting mould surface again
Application extends the service life of ingot mould, the burning of volatile paint is remained on ingot mould die wall though protecting ingot mould
Object is damaged, and casting process produces environmental pollution because of the scaling loss volatilization of coating, volatile paint is also unsuitable for zinc
The application of ingot mould.For this purpose, it is simple, of low cost based on a kind of use of currently used automatic pouring machine process study,
Improve ingot casting presentation quality, the coating and its application method for extending ingot mould service life urgently solve as field technology personnel
Technical barrier certainly.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of ingot mould coating, has coloured gold for zinc, aluminium etc.
The paint spraying of ingot mould surface of internal cavity when belonging to casting.
The ingredient and mass percent of ingot mould coating of the present invention be：Schmigel 18%~25%, titanium dioxide 5%~
10%, white clay 8%~12%, sodium carboxymethylcellulose 8%~10%, calgon 5%~8%, borax 10%~15%, surplus is water.
The raw material of ingot mould coating of the present invention composition is general in the market technical grade industrial chemicals.
Containing schmigel, white clay in ingot mould coating composition of the present invention, in order to ensure the flat appearance of obtained ingot casting
Smooth, uniform color, it is desirable that schmigel, white clay grain size be not more than 100 mesh granularities.
First by schmigel, titanium dioxide, white clay, sodium carboxymethylcellulose, six when ingot mould coating of the present invention
Sodium metaphosphate into the water, is eventually adding borax.
Water used is the warm water that temperature is not less than 80 DEG C when ingot mould coating of the present invention.
It is 60~80 DEG C that the temperature of ingot mould is required when ingot mould paint spraying of the present invention.
When ingot mould coating of the present invention uses：Above-mentioned raw materials are prepared with order of addition by mass percentage and are completed
Afterwards, using the method for spraying by applying coating in ingot mould surface of internal cavity, may be selected depending on the uniform situation applied 1 passage of spraying or
2 passages.
Beneficial effects of the present invention
（1）After ingot mould coating of the present invention, ingot casting appearance luster is uniform, and chromatic aberration defect is not present.
One layer of coating is formed in ingot casting mould surface after applying coating of the present invention, ingot mould and fused zinc, aluminium etc. is complete
Full isolation.Because there is suitable thermal resistance containing the refractory materials such as schmigel, titanium dioxide, borax, coating in coating and coating
Property, eliminates the heat dissipation inhomogeneities of ingot mould bottom, in turn ensures the suitable cooling velocity of liquid metal, eliminate blackening,
The mass defects such as aberration.
（2）Ingot mould coating of the present invention is easy to use, can apply online.
The composition raw materials used convenient material drawing of ingot mould coating of the present invention can utilize the handing-over of production process when use
Class's time control automatic pouring machine idle stroke operating, will by the way of spraying when ingot mould surface temperature is down to 60~80 DEG C
1~2 passage of spraying may be selected depending on the uniform situation applied in ingot casting mould surface for coating even application.It is burnt without additional after spraying
Knot processing, can normally be produced after drying to be coated.
（3）After ingot mould coating of the present invention, the service life of ingot mould can be extended.
It sprays ingot casting mould surface after coating of the present invention and forms one layer of coating, by the isolation such as ingot mould and fused zinc, aluminium,
Erosion and corrode of the molten metal to ingot casting mould surface are prevented, the service life of ingot mould is extended.
Specific implementation mode
With reference to specific embodiment, invention is further described in detail, but protection scope of the present invention is not limited to
Range described in embodiment.
Embodiment 1
The ingredient of ingot mould coating and mass percent described in the present embodiment are：Schmigel 18%, titanium dioxide 10%, white clay
12%, sodium carboxymethylcellulose 8%, calgon 8%, borax 15%, surplus is water.
When ingot mould coating described in the present embodiment uses：Above-mentioned raw materials are weighed by mass percentage, first by schmigel, two
Titanium oxide, white clay, sodium carboxymethylcellulose, calgon are put into the water that temperature is 80 DEG C, are eventually adding borax, and stirring is equal
It is even, stand the lather collapse for waiting for generating in coating.Unloaded ingot mould on zinc automatic pouring machine is advanced with slower speed, ingot casting
The temperature of mould is 80 DEG C, and the prepared coating of institute is sprayed on ingot mould surface of internal cavity.Automatic pouring machine restores after coating drying
Normal production status, zinc ingot metal surface is in the silvery white gloss of metallic zinc, uniform color after solidification falls ingot.Production statistics shows to make
It was extended for 28 months by original 14 months with the service life of zinc ingot metal mould after the ingot mould coating.
Embodiment 2
The ingredient of ingot mould coating and mass percent described in the present embodiment are：Schmigel 25%, titanium dioxide 5%, white clay
8%, sodium carboxymethylcellulose 10%, calgon 5%, borax 10%, surplus is water.
When ingot mould coating described in the present embodiment uses：Above-mentioned raw materials are weighed by mass percentage, first by schmigel, two
Titanium oxide, white clay, sodium carboxymethylcellulose, calgon are put into water at a temperature of 90 °C, are eventually adding borax, and stirring is equal
It is even, stand the lather collapse for waiting for generating in coating.Unloaded ingot mould on aluminium automatic pouring machine is advanced with slower speed, ingot casting
The temperature of mould is 60 DEG C, and the prepared coating of institute is sprayed on ingot mould surface of internal cavity.Automatic pouring machine restores after coating drying
Production status, aluminium ingot surface color is uniform after solidification falls ingot, no color differnece.Production statistics shows using aluminium after the ingot mould coating
The service life of ingot mould was extended for 26 months by original 14 months.
Embodiment 3
The ingredient of ingot mould coating and mass percent described in the present embodiment are：Schmigel 20%, titanium dioxide 8%, white clay
10%, sodium carboxymethylcellulose 9%, calgon 6%, borax 12%, surplus is water.
When ingot mould coating described in the present embodiment uses：Above-mentioned raw materials are weighed by mass percentage, first by schmigel, two
Titanium oxide, white clay, sodium carboxymethylcellulose, calgon are put into the boiling water of boiling, are eventually adding borax, are stirred evenly,
Stand the lather collapse for waiting for generating in coating.Unloaded ingot mould on zinc automatic pouring machine is advanced with slower speed, ingot mould
Temperature be 80 DEG C, the prepared coating of institute is sprayed on ingot mould surface of internal cavity.Automatic pouring machine restores life after coating drying
Occurrence state, ZnAl alloy ingot surface color is uniform after solidification falls ingot, no color differnece defect.Production statistics shows to use the ingot mould
The service life of zinc ingot metal mould was extended for 26 months by original 14 months after coating.
Claims (2)
1. a kind of ingot mould coating, it is characterised in that：The paint ingredient and mass percent are：Schmigel 18%~25%, two
Titanium oxide 5%~10%, white clay 8%~12%, sodium carboxymethylcellulose 8%~10%, calgon 5%~8%, borax 10%~
15%, surplus is water.
2. the preparation method of ingot mould coating described in claim 1, it is characterised in that：First by schmigel, two when coating
Titanium oxide, white clay, sodium carboxymethylcellulose, calgon are added to the water, and are eventually adding borax and stir evenly, coating
The temperature of Shi Suoyong water is not less than 80 DEG C.
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| CN201610014245.9A CN105562591B (en) | 2016-01-11 | 2016-01-11 | A kind of ingot mould coating and preparation method |
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| CN105562591B true CN105562591B (en) | 2018-07-24 |
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| CN108213327A (en) * | 2017-12-25 | 2018-06-29 | 山东立中轻合金汽车材料有限公司 | It is a kind of suitable for releasing agent of aluminium ingot casting mould and preparation method thereof |
| CN108555230A (en) * | 2018-01-04 | 2018-09-21 | 汉中锌业有限责任公司 | A kind of preparation method of the zinc ingot metal ingot mold coating of zinc hydrometallurgy |
| CN112404341B (en) * | 2020-11-02 | 2022-06-24 | 湖南塑源特科技有限公司 | Molding sand surface spraying agent beneficial to demolding and preparation method thereof |
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| CN1451696A (en) * | 2002-04-18 | 2003-10-29 | 陈海渊 | High-temp. resistant wear-preventing paint |
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| US8033320B2 (en) * | 2008-07-25 | 2011-10-11 | General Electric Company | High emittance shell molds for directional casting |
| CN102145372B (en) * | 2011-03-15 | 2012-06-27 | 上海爱尔思轻合金制品有限公司 | Coating for metal mold casting of aluminum alloy thin-walled piece and preparation method and coating method thereof |
| CN104384440B (en) * | 2014-11-14 | 2016-11-09 | 无锡伊佩克科技有限公司 | A kind of ingot mould antirusting paint and preparation method thereof |
| CN105057568A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | Nanometer-titania-strengthening easily-strippable water-based paint for lost foam casting and preparing method of water-based paint |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451696A (en) * | 2002-04-18 | 2003-10-29 | 陈海渊 | High-temp. resistant wear-preventing paint |
Non-Patent Citations (1)
| Title |
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| 大型钢锭模涂料实验研究;姚雁文;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20110315(第03期);B018-10 * |
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