CN105458162A - Rapid preparing method for coating for gray iron metal mold casting - Google Patents
Rapid preparing method for coating for gray iron metal mold casting Download PDFInfo
- Publication number
- CN105458162A CN105458162A CN201510854826.9A CN201510854826A CN105458162A CN 105458162 A CN105458162 A CN 105458162A CN 201510854826 A CN201510854826 A CN 201510854826A CN 105458162 A CN105458162 A CN 105458162A
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- China
- Prior art keywords
- mixed
- coating
- metal mold
- mold casting
- slurries
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Classifications
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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 relates to a rapid preparing method for a coating for gray iron metal mold casting. Mullite and kieselguhr serve as refractory aggregate, aluminum phosphate and water glass serve as a bonding agent, bentonite and sodium carboxymethylcellulose serve as a suspending agent, deionized water serves as a carrier liquid solvent, and the coating for gray iron metal mold casting is prepared through solution preparing, pulp mixing, stirring, grinding and ageing. The coating is thick liquid and is good in bonding power and good in uniformity and fixing strength. The gas-forming property is 8.36 mL/g, the heat conductivity coefficient is 1.5396 W.m<-1>.K<-1>, and the suspension property is 99.5%. The preparing method is advanced in technology, the technology process is short, the speed is high, data are accurate and full, the material ratio is reasonable, and the rapid preparing method is the advanced preparing method for the coating for gray iron metal mold casting.
Description
Technical field
The present invention relates to a kind of fast preparation method of gray iron coating for metal mold casting, belong to the technical field of the preparations and applicatio of ferrous metal casting auxiliary material.
Background technology
Permanent mold casting is the casting technique of a kind of advanced person, achieve in non-ferrous metal field and applied widely, but apply always less in the manufacture of gray iron part, in recent years along with the raising of die life, the research of gray iron permanent mold casting makes some progress.
Must coating be used in permanent mold casting, to avoid high-temperature liquid metal in casting process to impact mold hot, thus extend die life, better ensure cast shape, metal uniformity and product quality.
At present, the coating used in gray iron permanent mold casting is the fireproof coating prepared with bauxite, zirconium English powder and chromite powder, but the heat-proof quality of these aggregates is poor; The cast temperature of gray iron permanent mold casting is between 1300 DEG C-1400 DEG C, high temperature and heat fatigue make the life-span of mould greatly shorten, this just requires that coating dystecticly also will possess excellent heat-proof quality having simultaneously, to reduce the high temperature impact of molten metal to mould, the coating used at present is difficult to meet these technical requirements.
Summary of the invention
Goal of the invention
The object of the invention is the not enough situation for background technology, with mullite, diatomite for refractory aggregate, bentonite and sodium carboxymethylcellulose are suspending agent, aluminum phosphate and waterglass is binding agent, deionized water is carrier fluid solvent, be configured mixed to starch, stir, roll, ageing, make thick coating, to increase substantially the performance of gray iron coating for metal mold casting.
Technical scheme
The chemical substance material that the present invention uses is: mullite, diatomite, bentonite, sodium carboxymethylcellulose, aluminum phosphate, waterglass, deionized water, and it is as follows that its combination prepares consumption: with gram, milliliter for measurement unit
Mullite: Al
6si
2o
13850g ± 0.1g
Diatomite: SiO
2150g ± 0.1g
Bentonite: Na
0.33(Al, Mg, Fe)
2[(Si, Al)
4o
10] (OH)
24H
2o40g ± 0.1g
Sodium carboxymethylcellulose: C
8h
16naO
810g ± 0.1g
Aluminum phosphate: AlPO
430g ± 1g
Waterglass: Na
2siO
39H
2o20g ± 0.1g
Deionized water: H
2o3000mL ± 50mL
Preparation method is as follows
(1) selected chemical substance material
To carry out selected to the chemical substance material that preparation uses, and carry out quality purity control:
Mullite: solid powder 96%
Diatomite: solid powder 92.3%
Bentonite: solid powder 90%
Sodium carboxymethylcellulose: 98%
Aluminum phosphate: solid powder 97%
Waterglass: liquid state colloid 97%
Deionized water: liquid liquid, 99.9%
(2) sodium carboxymethyl cellulose solution is configured
Take sodium carboxymethylcellulose 10g ± 0.1g, measure deionized water 200mL ± 0.1mL, add in beaker, mix and blend 30min, become the sodium carboxymethyl cellulose solution of 0.19mol/L;
(3) bentonite solution is configured
Take bentonite 40g ± 0.1g, measure deionized water 400mL ± 0.1mL, add in beaker, mix and blend 30min, become the bentonite solution of 0.141mol/L;
(4) mixed slurry
Take mullite 850g ± 0.1g, diatomite 150g ± 0.1g, aluminum phosphate 30g ± 0.1g, waterglass 20g ± 0.1g; Measure sodium carboxymethyl cellulose solution 200mL ± 0.1mL, bentonite solution 400mL ± 0.1mL, deionized water 300mL ± 0.1mL; Join in mixing hollander;
Open mixing hollander, mixing hollander revolution is 60r/min, and the chemical substance in mixing hollander is mixed, and becomes mixed slurries;
(5) mixed slurries are rolled
Roll mixed slurries to carry out on roller, complete rolling, in the process that adds water;
1. mixed slurries are placed in the slurry tank of roller;
2. the inlet of slurry tank is opened, the mixed slurries of input in roller; Mixed slurries input speed 4mL/min;
3. open roller, roll, roll revolution 36r/min, roll pressure 1.6Mpa;
4. carry out rolling circulation in roller compaction process, rolling cycle-index is 8 times, rolls the thick slurries of rear one-tenth;
(6) still aging
Be collected in rustless steel container by the thick slurries after rolling, still aging 24h at 25 DEG C, is gray iron coating for metal mold casting after ageing;
(7) detect, analyze, characterize
The pattern of gray iron coating for metal mold casting of preparation, color and luster, composition, Chemical Physics performance are detected, analyze, characterized;
The gas-forming property analysis of coating is carried out with GET-3 intelligence gas-forming property analyzer;
The heat-insulating property analysis of coating is carried out with heat-insulating property analyzer;
Suspension analysis is carried out with the tool plug graduated cylinder of Φ 25mm × 100mL;
Conclusion: gray iron coating for metal mold casting is the thick slurries of grey black, and gas-forming property is 8.36mL/g, and thermal conductivity factor is 1.5396Wm
-1k
-1, suspension is 99.5%;
(8) slurry storage
Preparation thick slurry storage in metal drum ladle, sealed storage, prevent fires, sun-proof, moistureproof, anti-acid-alkali salt erosion, be stored in shady and cool clean environment, storage temperature 20 DEG C, relative humidity≤10%.
Beneficial effect
The present invention has obvious advance compared with background technology, for refractory aggregate with mullite, diatomite, aluminum phosphate, waterglass are binding agent, and sodium carboxymethylcellulose, bentonite are suspending agent, and deionized water is carrier fluid solvent, be configured solution, mixed starch, stir, roll, ageing, make gray iron coating for metal mold casting, coating is viscous liquid, and cohesive force is strong, good evenness, degree of fixation are good, gas-forming property is 8.36mL/g, and thermal conductivity factor is 1.5396Wm
-1k
-1, suspension is 99.5%, and this preparation method's technique is advanced, and technological process is short, and speed is fast, and data are accurately full and accurate, and material mixture ratio is reasonable, is the fast preparation method of advanced gray iron coating for metal mold casting.
Accompanying drawing explanation
Fig. 1, gray iron coating for metal mold casting roll state diagram
Fig. 2, gray iron coating for metal mold casting microscopic appearance figure
Fig. 3, gray iron coating for metal mold casting diffracted intensity collection of illustrative plates
Shown in figure, list of numerals is as follows:
1, console, 2, display screen, 3, indicator lamp, 4, power switch, 5, motor modulator is rolled, 6, lower mill disc, 7, upper mill disc, 8, motor is rolled, 9, mixed stock tank, 10, mixed stock tank lid, 11, tank, 12, sink cover, 13, feeding cylinder, 14, control slurry valve, 15, water control valve, 16, drain pipe, 17, product case, 18, mixed slurries, 19, deionized water.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described:
Shown in Fig. 1, for gray iron coating for metal mold casting rolls state diagram, each position wants correct, and proportioning according to quantity, operates according to the order of sequence.
The value of the chemical substance that preparation uses determines by the scope pre-set, with gram, milliliter for measurement unit.
Gray iron coating for metal mold casting mixes rolling of slurries to carry out on roller, completes rolling, in the process that adds water;
Roller is vertical, the bottom of roller is console 1, be lower mill disc 6 on the top of console 1, mill disc 7 on the top of lower mill disc 6 is, the top of upper mill disc 7 connects rolls motor 8, mixed stock tank 9 is provided with on the top of rolling motor 8, mixed stock tank 9 top is mixed stock tank lid 10, and the top of mixed stock tank lid 10 is tank 11, and tank 11 top is sink cover 12, being mixed slurries 18 in mixed stock tank 9, is deionized water 19 in tank 11; Centre position in upper mill disc 7, mixed stock tank 9, tank 11 is provided with feeding cylinder 13, and feeding cylinder 13 is through the centre position of rolling motor 8; The top of feeding cylinder 13 is provided with water control valve 15, control slurry valve 14 successively, and water control valve 15 regulates and controls the flow of deionized water 19, and control slurry valve 14 regulates and controls the flow of mixed slurries 18; Be provided with drain pipe 16 at the right lower quadrant of lower mill disc 6, drain pipe 16 connects product case 17; Console 1 is provided with display screen 2, indicator lamp 3, power switch 4, rolls motor modulator 5.
Shown in Fig. 2, be gray iron coating for metal mold casting microscopic appearance figure, shown in figure, mullite is combined with diatomite closely, and all the other components are distributed in mullite and diatomite surface, form the one be evenly distributed, without obvious clustering phenomena.
Shown in Fig. 3, be gray iron coating for metal mold casting diffracted intensity figure, shown in figure, main peak is SiO
2, other is mullite phase.
Claims (2)
1. a gray iron coating for metal mold casting fast preparation method, it is characterized in that: the chemical substance material of use is: mullite, diatomite, aluminum phosphate, waterglass, sodium carboxymethylcellulose, bentonite, deionized water, it is as follows that its combination prepares consumption: with gram, milliliter for measurement unit
Mullite: Al6Si2O13850g ± 0.1g
Diatomite: SiO2150g ± 0.1g
Bentonite: Na0.33(Al, Mg, Fe) 2 [(Si, Al) 4O10] (OH) 24H2O40g ± 0.1g
Sodium carboxymethylcellulose: C8H16NaO810g ± 0.1g
Aluminum phosphate: AlPO430g ± 0.1g
Waterglass: Na2SiO39H2O20g ± 0.1g
Deionized water: H2O3000mL ± 50mL
Preparation method is as follows
(1) selected chemical substance material
To carry out selected to the chemical substance material that preparation uses, and carry out quality purity control:
Mullite: solid powder 96%
Diatomite: solid powder 92.3%
Bentonite: solid powder 90%
Sodium carboxymethylcellulose: 98%
Aluminum phosphate: solid powder 97%
Waterglass: liquid state colloid 97%
Deionized water: liquid liquid, 99.9%
(2) sodium carboxymethyl cellulose solution is configured
Take sodium carboxymethylcellulose 10g ± 0.1g, measure deionized water 200mL ± 0.1mL, add in beaker, mix and blend 30min, become the sodium carboxymethyl cellulose solution of 0.19mol/L;
(3) bentonite solution is configured
Take bentonite 40g ± 0.1g, measure deionized water 400mL ± 10mL, add in beaker, mix and blend 30min, become the bentonite solution of 0.141mol/L;
(4) mixed slurry
Take mullite 850g ± 0.1g, diatomite 150g ± 0.1g, aluminum phosphate 30g ± 0.1g; Measure sodium carboxymethyl cellulose solution 300mL ± 0.1mL, bentonite solution 400mL ± 0.1mL; Measure deionized water 300mL ± 0.1mL; Join in mixing hollander;
Open mixing hollander, mixing hollander revolution is 60r/min, and the chemical substance in mixing hollander is mixed, and becomes mixed slurries;
(5) mixed slurries are rolled
Roll mixed slurries to carry out on roller, complete rolling, in the process that adds water;
5. mixed slurries are placed in the slurry tank of roller;
6. the inlet of slurry tank is opened, the mixed slurries of input in roller; Mixed slurries input speed 4mL/min;
7. open roller, roll, roll revolution 36r/min, roll pressure 1.6Mpa;
8. carry out rolling circulation in roller compaction process, rolling cycle-index is 8 times, rolls the thick slurries of rear one-tenth;
(6) still aging
Be collected in rustless steel container by the thick slurries after rolling, still aging 24h at 25 DEG C, is gray iron coating for metal mold casting after ageing;
(7) detect, analyze, characterize
The pattern of gray iron coating for metal mold casting of preparation, color and luster, composition, Chemical Physics performance are detected, analyze, characterized;
The gas-forming property analysis of coating is carried out with GET-3 intelligence gas-forming property analyzer;
The heat-insulating property analysis of coating is carried out with heat-insulating property analyzer;
Suspension analysis is carried out with the tool plug graduated cylinder of Φ 25mm × 100mL;
Conclusion: gray iron coating for metal mold casting is the thick slurries of grey black, and gas-forming property is 8.36mL/g, and thermal conductivity factor is 1.5396Wm-1K-1, and suspension is 99.5%;
(8) slurry storage
The thick slurry storage of preparation is in metal drum ladle, and sealed storage, prevent fires, the erosion such as sun-proof, moistureproof, anti-hydrochlorate, is stored in shady and cool clean environment, storage temperature 20 DEG C, relative humidity≤10%.
2. the fast preparation method of a kind of gray iron coating for metal mold casting according to claim 1, is characterized in that: gray iron coating for metal mold casting mixes rolling of slurries to carry out on roller, completes rolling, in the process that adds water;
Roller is vertical, the bottom of roller is console (1), be lower mill disc (6) on the top of console (1), upper mill disc (7) on the top of lower mill disc (6), the top of upper mill disc (7) connects rolls motor (8), mixed stock tank (9) is provided with on the top of rolling motor (8), on mixed stock tank, (9) portion is mixed stock tank lid (10), the top of mixed stock tank lid (10) is tank (11), tank (11) top is sink cover (12), being mixed slurries (18) in mixed stock tank (9), is deionized water (19) in tank (11); Centre position in upper mill disc (7), mixed stock tank (9), tank (11) is provided with feeding cylinder (13), and feeding cylinder (13) is through the centre position of rolling motor (8); The top of feeding cylinder (13) is provided with water control valve (15), control slurry valve (14), the flow of water control valve (15) regulation and control deionized water (19) successively, the flow of the mixed slurries (18) of control slurry valve (14) regulation and control; Be provided with drain pipe (16) at the right lower quadrant of lower mill disc (6), drain pipe (16) connects product case (17); Console (1) is provided with display screen (2), indicator lamp (3), power switch (4), rolls motor modulator (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510854826.9A CN105458162A (en) | 2015-11-30 | 2015-11-30 | Rapid preparing method for coating for gray iron metal mold casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510854826.9A CN105458162A (en) | 2015-11-30 | 2015-11-30 | Rapid preparing method for coating for gray iron metal mold casting |
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|---|---|
| CN105458162A true CN105458162A (en) | 2016-04-06 |
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ID=55596567
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|---|---|---|---|
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247009A (en) * | 2017-06-16 | 2017-10-13 | 内蒙古科技大学 | A kind of pipe clamp photoelectricity door determines coefficient of viscosity experiment instrument |
| CN109108210A (en) * | 2018-09-25 | 2019-01-01 | 安徽省汉甲机电设备科技有限公司 | A kind of graft modification mullite moulding sand for casting |
| CN112496255A (en) * | 2020-11-27 | 2021-03-16 | 安徽华飞机械铸锻有限公司 | Preparation method of lost foam casting coating with excellent suspension property |
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| CN101497105A (en) * | 2009-03-12 | 2009-08-05 | 深圳市景鼎现代科技有限公司 | Cast form water borne coating and technique for preparing the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247009A (en) * | 2017-06-16 | 2017-10-13 | 内蒙古科技大学 | A kind of pipe clamp photoelectricity door determines coefficient of viscosity experiment instrument |
| CN109108210A (en) * | 2018-09-25 | 2019-01-01 | 安徽省汉甲机电设备科技有限公司 | A kind of graft modification mullite moulding sand for casting |
| CN112496255A (en) * | 2020-11-27 | 2021-03-16 | 安徽华飞机械铸锻有限公司 | Preparation method of lost foam casting coating with excellent suspension property |
| CN112496255B (en) * | 2020-11-27 | 2023-10-24 | 安徽华飞机械铸锻有限公司 | Preparation method of lost foam casting coating with excellent suspension property |
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Application publication date: 20160406 |
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