CN107414016A - A kind of cast paint for overlay film sand mold and preparation method thereof - Google Patents
A kind of cast paint for overlay film sand mold and preparation method thereof Download PDFInfo
- Publication number
- CN107414016A CN107414016A CN201710653129.6A CN201710653129A CN107414016A CN 107414016 A CN107414016 A CN 107414016A CN 201710653129 A CN201710653129 A CN 201710653129A CN 107414016 A CN107414016 A CN 107414016A
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- China
- Prior art keywords
- overlay film
- sand mold
- cast paint
- film sand
- jfc
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention provides a kind of cast paint for overlay film sand mold and preparation method thereof, each key component mass percent composition：Zirconium English powder 49 ~ 51%, sodium bentonite 2 ~ 3%, polyvinyl alcohol 1 ~ 2%, Ludox 5 ~ 10%, sodium carboxymethylcellulose（CMC）0.2 ~ 0.35%, penetrating agent JFC 0.2 ~ 0.35%, defoamer 0.3 ~ 0.4%, water surplus.The prepared cast paint rate of drying for overlay film sand mold is fast, and coating is bright and clean, and the casting not scab that can pour into a mould precoated sand, resistance to molten steel washes away, and surface smoothness is high, quality better.
Description
Technical field
The present invention relates to precoated sand to cast paint field, in particular to a kind of cast paint and its system for overlay film sand mold
Preparation Method.
Background technology
Coated sand technology is due to its short molding cycle, technical process is simple, production cost is low, is more and more cast
Make enterprise's use.But because its surface roughness largely relies on the use of coating.Therefore coating quality
Quality directly determines cast(ing) surface quality, and the existing coating of in the market is difficult to reach the effect for improving its surface quality of continuous castings.
For overlay film sand coating because precoated sand sand grains is very thin, the gap between sand grains is very small, the refractory aggregate in coating
If particle is not thin enough, the permeability of coating can decline, it is difficult to gap therebetween is filled up, causes the roughness of sand mold high, and then
Make the inadequate flat smooth of cast(ing) surface quality.Fine paint powder easily produces scasoning check when drying simultaneously, has made coating
Mo ld void is reduced, and casting may be caused to produce stomata or surface air pit.
The content of the invention
It is an object of the invention to provide a kind of cast paint for precoated sand and preparation method thereof, to solve prior art
In be not enough to reach following purpose：（1）The permeability of coating is improved using the refractory material and Ludox of superfine granularity, is improved
The smoothness of sand mold；（2）Coating has low gas-forming property and good gas permeability, reduces the generation of cast(ing) surface stomata and air pit；
（3）Coating has preferable normal temperature and elevated temperature strength, the coating of cast(ing) surface is easily shelled, and casting not scab, can adapt to heat
Spray, cold spray and brushing.
To achieve the above object, the invention provides following technical scheme.
A kind of cast paint for overlay film sand mold, the mass percent composition of each key component：
Zirconium English powder 49 ~ 51%
Sodium bentonite 2 ~ 3%
Polyvinyl alcohol 1 ~ 2%
Ludox 5 ~ 10%
Sodium carboxymethylcellulose（CMC） 0.2~0.35%
Penetrating agent JFC 0.2 ~ 0.35%
Defoamer 0.3 ~ 0.4%
Water 35 ~ 40%
In said components, zirconium English Powder Particle Size is 800 mesh, and polyvinyl alcohol is cold water instant dissolving type polyvinyl alcohol.
In said components, one or more of the penetrating agent JFC in JFC, JFC-1, JFC-2.
In said components, one or more of the defoamer in n-butanol, n-amyl alcohol or n-octyl alcohol.
In said components, the Ludox is industrial grade silica sol colloidal solution, and particle diameter is more than 20nm.
For the preparation method of the water base cast paint of precoated sand casting, comprise the following steps：
（1）According to the mass percent of the cast paint for overlay film sand mold described in claim 1 by zirconium English powder, Na-bentonite
Soil, polyvinyl alcohol and sodium carboxymethylcellulose（CMC）It is uniform to add mixer；
（2）Measure the moisture of the mass percent of the cast paint for overlay film sand mold described in claim 1 for etc. quality
Two parts, take a copy of it to add Ludox, penetrating agent JFC, stir evenly to obtain solution A；
（3）Solution A point is added in mixer several times, it is stirring while adding, stir 30 ~ 40 minutes, then take another moisture
Add in mixer, produce coating finished product within 30 minutes stirring while adding.
Coating prepared by the present invention in actual use, no matter using which kind of painting way, can obtain bright and clean painting
Layer.The height of the more conventional method of Ludox content, coating fast drying, coating moisture is low, and it is strong to assign the higher high temperature of coating
Degree and relatively low gas-forming property；Polyvinyl alcohol is a kind of very strong organic binder bond, can have the cast paint stronger normal
Warm intensity, its at high temperature can ablation or volatilization leave hole, make the cast paint that there is good gas permeability, while have
Wetting booster action；The more conventional coating levels of penetrating agent JFC are high, for strengthening penetration, coordinate the silicon of stronger penetrating power
Colloidal sol can make in the gap that the cast paint is fully infiltrated between sand grains, to prevent molten metal from entering the passage of sand mold, prevent from gluing
The appearance of sand and current mark.The cast paint selects the Ludox of larger particle, coating to occur without crackle after drying.Defoamer can subtract
Foam caused by few surfactant, avoids coating from producing bubble class defect.
Beneficial effects of the present invention：Coating prepared by the present invention have higher elevated temperature strength, relatively low gas-forming property and
It good gas permeability, can at high temperature sinter, the dope layer of cast(ing) surface is easily shelled, casting not scab, especially in heat collection
In gate area, coating has stronger resistance molten steel scouring capability.The cast paint causes the cast(ing) surface that precoated sand is poured into a mould
Quality is substantially improved, and cast(ing) surface quality obtains larger raising.
Brief description of the drawings
Fig. 1（a）Overlay film sand mold figure after being sprayed for embodiment 1；
Fig. 1（b）For the casting effect contrast figure of embodiment 1 and comparative example 1：
Fig. 2（a）Overlay film sand mold figure after being sprayed for embodiment 2；
Fig. 2（b）For the casting effect contrast figure of embodiment 2 and comparative example 1：
Fig. 3（a）Overlay film sand mold figure after being sprayed for embodiment 3；
Fig. 3（b）For the casting effect contrast figure of embodiment 3 and comparative example 1.
Embodiment
With reference to specific embodiment, the present invention is further described, the complete not limited to this of present disclosure.
Zirconium English powder used is 800 mesh in embodiment, and polyvinyl alcohol is cold water instant dissolving type polyvinyl alcohol, and Ludox is that particle diameter is big
In 20nm industrial grade silica sol colloidal solution.
Embodiment 1
100 kilograms of coating is prepared, step is as follows：
（1）Weigh 51 kilograms of zirconium English powder, 2.3 kilograms of sodium bentonite, 1 kilogram of polyvinyl alcohol respectively by mass percentage, silicon is molten
5 kilograms of glue, sodium carboxymethylcellulose（CMC）0.2 kilogram, 0.2 kilogram of penetrating agent JFC, 0.3 kilogram of defoamer n-butanol, water
40 kilograms；
（2）Zirconium English powder, sodium bentonite, polyvinyl alcohol, sodium carboxymethylcellulose are added mixer and stirred；
（3）Take 20 kg of water, Ludox, penetrating agent JFC are added to the water stir evenly to obtain solution A it is standby；
（4）Solution A is added in mixer, stirring while adding, stirring makes coating be in paste in 30 minutes, then adds at twice again
Totally 20 kg of water, produce product within 30 minutes stirring while adding.Using spray gun spraying or brush.
Embodiment 2
100 kilograms of coating is prepared, step is as follows：
（1）Weigh 49 kilograms of zirconium English powder, 3 kilograms of sodium bentonite, 2 kilograms of polyvinyl alcohol, Ludox respectively by mass percentage
10 kilograms, sodium carboxymethylcellulose（CMC）0.35 kilogram, 0.25 kilogram of penetrating agent JFC -1,0.4 kilogram of defoamer n-amyl alcohol,
35 kilograms of water；
（2）Zirconium English powder, sodium bentonite, polyvinyl alcohol, sodium carboxymethylcellulose are added mixer and stirred；
（3）Take 17 kg of water, Ludox, penetrating agent JFC are added to the water stir evenly to obtain solution A it is standby；
（4）Solution A point is added in mixer several times, stirring while adding, stirring makes coating be in paste in 35 minutes, then divides again
Add 18 kg of water altogether twice, continue stirring and produce product in 30 minutes.Using spray gun spraying or brush.
Embodiment 3
100 kilograms of coating is prepared, step is as follows：
（1）Weigh 51 kilograms of zirconium English powder, 2 kilograms of sodium bentonite, 1 kilogram of polyvinyl alcohol, Ludox 7 respectively by mass percentage
Kilogram, sodium carboxymethylcellulose（CMC）0.3 kilogram, 0.35 kilogram of penetrant JFC-2,0.35 kilogram of defoamer n-octyl alcohol, water
38 kilograms；
（2）Zirconium English powder, sodium bentonite, polyvinyl alcohol, sodium carboxymethylcellulose are added mixer and stirred；
（3）Take 19 kg of water, Ludox, penetrating agent JFC are added to the water stir evenly to obtain solution A it is standby；
（4）Solution A point is added in mixer several times, stirring while adding, stirring makes coating be in paste in 40 minutes, then divides again
Totally 19 kg of water is added twice, is continued stirring and is produced product in 30 minutes.Using spray gun spraying or brush.
Comparative example 1
100 kilograms of coating is prepared, step is as follows：
By 50 kilogram of 200 mesh silica flour, 20 kilogram of 325 mesh silica flour, 3 kilograms of sodium bentonites, 2 kilograms of polyvinyl alcohol contracting fourths
Aldehyde, 2 kilograms of rosin, 23 kilograms of alcohol are added in mixer and stirred evenly.Using spray gun spraying or brush.
Fig. 1 ~ 3（a）、（b）Respectively illustrate overlay film sand mold figure and the drawing of rough casting after embodiment 1 ~ 3 sprays with comparative example 1.Spray
After coating, the sandpit of overlay film mould surface is filled and led up, and coating surface is bright and clean, and dope layer does not influence the graininess of coating finish
Coating.The surface finish of casting difference of comparative example 1 and embodiment 1 ~ 3 is obvious, before the bright and clean degree of the latter, surface quality are better than
Person.
In a word, coating of the invention make it that the surface quality of continuous castings that precoated sand is poured into a mould substantially is improved, cast(ing) surface product
Matter obtains larger raising.
Claims (6)
- A kind of 1. cast paint for overlay film sand mold, it is characterised in that the mass percent composition of each key component：
- 2. the cast paint according to claim 1 for overlay film sand mold, it is characterised in that：The zirconium English Powder Particle Size is 800 mesh；The polyvinyl alcohol is cold water instant dissolving type polyvinyl alcohol.
- 3. the cast paint according to claim 1 for overlay film sand mold, it is characterised in that：The penetrating agent JFC is selected from One or more in JFC, JFC-1, JFC-2.
- 4. the cast paint according to claim 1 for overlay film sand mold, it is characterised in that：The defoamer is selected from positive fourth One or more in alcohol, n-amyl alcohol or n-octyl alcohol.
- 5. the cast paint according to claim 1 for overlay film sand mold, it is characterised in that：The Ludox is technical grade Ludox colloidal solution, particle diameter are more than 20nm.
- 6. the preparation method of a kind of cast paint for overlay film sand mold, it is characterised in that comprise the following steps：(1) according to the mass percent of the cast paint for overlay film sand mold described in claim 1 by zirconium English powder, Na-bentonite It is uniform that soil, polyvinyl alcohol and sodium carboxymethylcellulose (CMC) add mixer；(2) measure the moisture of the mass percent of the cast paint for overlay film sand mold described in claim 1 for etc. quality Two parts, take a copy of it to add Ludox, penetrating agent JFC, stir evenly to obtain solution A；(3) solution A point is added in mixer several times, it is stirring while adding, stir 30~40 minutes, then take another water to add Enter in mixer, produce coating finished product within 30 minutes stirring while adding.
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| CN201710653129.6A CN107414016B (en) | 2017-08-02 | 2017-08-02 | A kind of cast paint and preparation method thereof for overlay film sand mold |
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| CN107414016A true CN107414016A (en) | 2017-12-01 |
| CN107414016B CN107414016B (en) | 2019-06-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303116A (en) * | 2019-08-11 | 2019-10-08 | 桑超 | A kind of overlay film sand shell mould coating and preparation method thereof |
| CN110695309A (en) * | 2019-11-28 | 2020-01-17 | 桑超 | Alcohol-based film-coated sand cavity coating and preparation method thereof |
| CN111558686A (en) * | 2020-05-12 | 2020-08-21 | 唐山昊中科技有限公司 | Precoated sand shell type iron sand negative pressure casting coating |
| CN111774519A (en) * | 2020-07-14 | 2020-10-16 | 老河口金琳汽配制造有限公司 | Special water-based paint for precoated sand |
| CN114799041A (en) * | 2022-05-07 | 2022-07-29 | 安徽大天铸业有限责任公司 | Precoated sand-loam core coating for inner runner of casting and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5573982A (en) * | 1994-03-05 | 1996-11-12 | Mitsubishi Chemical Basf Company Limited | Slurry composition, shaping method using the same, and fired body |
| CN101319104A (en) * | 2008-06-20 | 2008-12-10 | 中国矿业大学(北京) | Composite suspension agent of alcohol based dry powder paint, preparation method and prepared paint thereof |
| CN105945211A (en) * | 2016-05-31 | 2016-09-21 | 湖北工业大学 | Water-based casting coating for precoated sand casting and preparation method thereof |
| CN106914583A (en) * | 2017-02-28 | 2017-07-04 | 湖北工业大学 | A kind of dry cream shape cast paint and preparation method thereof and application method |
-
2017
- 2017-08-02 CN CN201710653129.6A patent/CN107414016B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5573982A (en) * | 1994-03-05 | 1996-11-12 | Mitsubishi Chemical Basf Company Limited | Slurry composition, shaping method using the same, and fired body |
| CN101319104A (en) * | 2008-06-20 | 2008-12-10 | 中国矿业大学(北京) | Composite suspension agent of alcohol based dry powder paint, preparation method and prepared paint thereof |
| CN105945211A (en) * | 2016-05-31 | 2016-09-21 | 湖北工业大学 | Water-based casting coating for precoated sand casting and preparation method thereof |
| CN106914583A (en) * | 2017-02-28 | 2017-07-04 | 湖北工业大学 | A kind of dry cream shape cast paint and preparation method thereof and application method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303116A (en) * | 2019-08-11 | 2019-10-08 | 桑超 | A kind of overlay film sand shell mould coating and preparation method thereof |
| CN110695309A (en) * | 2019-11-28 | 2020-01-17 | 桑超 | Alcohol-based film-coated sand cavity coating and preparation method thereof |
| CN111558686A (en) * | 2020-05-12 | 2020-08-21 | 唐山昊中科技有限公司 | Precoated sand shell type iron sand negative pressure casting coating |
| CN111774519A (en) * | 2020-07-14 | 2020-10-16 | 老河口金琳汽配制造有限公司 | Special water-based paint for precoated sand |
| CN114799041A (en) * | 2022-05-07 | 2022-07-29 | 安徽大天铸业有限责任公司 | Precoated sand-loam core coating for inner runner of casting and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN107414016B (en) | 2019-06-11 |
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Effective date of registration: 20230511 Address after: 072353 300 meters east of Dongmazhai Village Front Street, Wangjing Town, Tang County, Baoding City, Hebei Province Patentee after: Baoding Baomeng New Material Technology Co.,Ltd. Address before: 430068 1, Lijia 1 village, Nanhu, Wuchang District, Wuhan, Hubei Patentee before: HUBEI University OF TECHNOLOGY |