CN107262664A - A kind of Automobile flywheel shell moulding sand for casting - Google Patents
A kind of Automobile flywheel shell moulding sand for casting Download PDFInfo
- Publication number
- CN107262664A CN107262664A CN201710717080.6A CN201710717080A CN107262664A CN 107262664 A CN107262664 A CN 107262664A CN 201710717080 A CN201710717080 A CN 201710717080A CN 107262664 A CN107262664 A CN 107262664A
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- China
- Prior art keywords
- starch
- beta cyclodextrin
- solution
- flywheel shell
- automobile flywheel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
Abstract
The invention discloses a kind of Automobile flywheel shell moulding sand for casting, it is related to ironcasting technical field, is made up of following component：Quartz sand, waterglass, α starch crosslinking beta cyclodextrin, clay, activated calcium carbonate, glass fibre, water；A kind of Automobile flywheel shell moulding sand for casting prepared by the present invention, with good gas permeability and green compression strength, can significantly improve the surface quality of the Automobile flywheel shell of casting.
Description
Technical field
The invention belongs to casting technology field, and in particular to a kind of Automobile flywheel shell moulding sand for casting.
Background technology
Bell housing is one of parts of engine, and flywheel shell of engine is located between body and gearbox, and engine flies
Hub is installed on the outside of engine flywheel and is fixedly connected with engine body and gearbox, and bell housing is used by flywheel chamber
In cover lid flywheel, play a part of connection body, protection and carrier.
Bell housing is generally formed by iron casting, and traditional casting sand easily causes casting table because of the imperfection of performance
Face remaining has stomata, crack, or even the problems such as deformation.
The content of the invention
The purpose of the present invention is that there is provided a kind of Automobile flywheel shell moulding sand for casting the problem of being directed to existing.
The present invention is achieved by the following technical solutions：
A kind of Automobile flywheel shell moulding sand for casting, it is characterised in that be made up by weight of following component：Quartz sand 60-80,
Waterglass 8-12, α starch crosslinking beta cyclodextrin 6-8, clay 18-25, activated calcium carbonate 6-10, glass fibre 3-5, water 15-30；
The α starch crosslinking beta cyclodextrin presses 5-8 by α starch and beta cyclodextrin:3 mass ratio crosslinking is formed；The α starch by
Cornstarch is made.
Further, the quartz sand particle size is 0.8-1.2mm.
Further, the clay particle diameter is that particle diameter is 0.3-0.5mm.
Further, the waterglass mass fraction is 20% sodium silicate solution.
Further, the α starch crosslinking beta cyclodextrin preparation method is：
（1）Beta cyclodextrin is added to the water dissolving, the beta cyclodextrin solution that mass concentration is 5.8% is made, 40 DEG C are heated to, then
α starch is added, mixed solution is obtained after stirring, uses mass fraction for 3.5% phosphoric acid solution, adjusts mixed solution
PH value is 4.2, and the Diethylenetriamine of beta cyclodextrin solution quality 0.1% is then added again, stirs 40min with 200r/min rotating speeds, obtains
To mixed solution；
（2）Every 20min to step（1）Middle mixed solution carries out ultrasonically treated 30s, continues 3 hours, obtains reaction solution；
（3）Rotary evaporation concentrate drying is carried out to reaction solution, solids is obtained, attrition grinding is crossed 300 mesh sieves, produced.
Further, the activated calcium carbonate preparation method is：
（1）To quick lime of the mass fraction for 15% aqueous ammonium chloride solution addition 80-100 mesh, liquid-solid ratio under continuous stirring condition
For 20:1,2.5h is reacted under the conditions of 72 DEG C of temperature, rotating speed 1200r/min, then calcium chloride slurries are obtained through separation of solid and liquid；
（2）Under the conditions of 35 DEG C of temperature, rotating speed 500r/min, the phosphate of its quality 1% is added into calcium chloride slurries, is stirred
After uniform, pure carbon dioxide is then passed to, fine calcium carbonate slurries is obtained, fine calcium carbonate slurries is dried, then
Crush, cross 400 mesh sieves, produce.
The present invention has advantages below compared with prior art：The present invention is micro- due to activation by preparing activated calcium carbonate
Thin calcium carbonate particle diameter is smaller, and specific surface area is big, and surface free energy is high, in thermodynamics unsteady state, can be easier to and glue
Align themselves, so as to improve porosity, increase gas permeability, meanwhile, it is capable to necessarily into space network between soil
Stability after being solidified in degree between raising molding sand, so that molding sand is more easily separated in the demoulding with bell housing, flies
Hub under the casting of conventional molding sand, is easily deformed, the molding sand prepared using the present invention due to its architectural characteristic, can be well
The deflection of bell housing is reduced, the present invention is crosslinked β rings by using α starch and pasted, and it can significantly improve molding sand green compression strength, together
When enable to moulding-sand property to be significantly improved so that the quality of bell housing obtains universal raising, and gas hole defect declines
20%, sand holes defect declines 50%, and total percent defective have dropped 8.5%, and molding sand tissue is evenly spread to by what α starch crosslinking β rings were pasted
In, enable to sand permeability to be significantly improved, and the gas produced during metal liquid contact die cavity greatly reduces,
So that bleb is reduced, therefore burning into sand defect also eliminates, thus, sand hole is also significantly reduced.
Embodiment
Embodiment 1
A kind of Automobile flywheel shell moulding sand for casting, it is characterised in that be made up by weight of following component：Quartz sand 60, water
Glass 8, α starch crosslinking beta cyclodextrin 6, clay 18, activated calcium carbonate 6, glass fibre 3, water 15；The α starch is formed sediment by corn
Powder is made；
The α starch crosslinking beta cyclodextrin presses 5 by α starch and beta cyclodextrin:3 mass ratio crosslinking is formed.
Further, the quartz sand particle size is 0.8mm.
Further, the clay particle diameter is that particle diameter is 0.3mm.
Further, the waterglass mass fraction is 20% sodium silicate solution.
Further, the α starch crosslinking beta cyclodextrin preparation method is：
（1）Beta cyclodextrin is added to the water dissolving, the beta cyclodextrin solution that mass concentration is 5.8% is made, 40 DEG C are heated to, then
α starch is added, mixed solution is obtained after stirring, uses mass fraction for 3.5% phosphoric acid solution, adjusts mixed solution
PH value is 4.2, and the Diethylenetriamine of beta cyclodextrin solution quality 0.1% is then added again, stirs 40min with 200r/min rotating speeds, obtains
To mixed solution；
（2）Every 20min to step（1）Middle mixed solution carries out ultrasonically treated 30s, continues 3 hours, obtains reaction solution；
（3）Rotary evaporation concentrate drying is carried out to reaction solution, solids is obtained, attrition grinding is crossed 300 mesh sieves, produced.
Further, the activated calcium carbonate preparation method is：
（1）To quick lime of the mass fraction for 15% aqueous ammonium chloride solution 80 mesh of addition under continuous stirring condition, liquid-solid ratio is
20:1,2.5h is reacted under the conditions of 72 DEG C of temperature, rotating speed 1200r/min, then calcium chloride slurries are obtained through separation of solid and liquid；
（2）Under the conditions of 35 DEG C of temperature, rotating speed 500r/min, the phosphate of its quality 1% is added into calcium chloride slurries, is stirred
After uniform, pure carbon dioxide is then passed to, fine calcium carbonate slurries is obtained, fine calcium carbonate slurries is dried, then
Crush, cross 400 mesh sieves, produce.
Embodiment 2
A kind of Automobile flywheel shell moulding sand for casting, it is characterised in that be made up by weight of following component：Quartz sand 80, water
Glass 12, α starch crosslinking beta cyclodextrin 8, clay 25, activated calcium carbonate 10, glass fibre 5, water 30；The α starch is formed sediment by corn
Powder is made；
The α starch crosslinking beta cyclodextrin presses 8 by α starch and beta cyclodextrin:3 mass ratio crosslinking is formed.
Further, the quartz sand particle size is 1.2mm.
Further, the clay particle diameter is that particle diameter is 0.5mm.
Further, the waterglass mass fraction is 20% sodium silicate solution.
Further, the α starch crosslinking beta cyclodextrin preparation method is：
（1）Beta cyclodextrin is added to the water dissolving, the beta cyclodextrin solution that mass concentration is 5.8% is made, 40 DEG C are heated to, then
α starch is added, mixed solution is obtained after stirring, uses mass fraction for 3.5% phosphoric acid solution, adjusts mixed solution
PH value is 4.2, and the Diethylenetriamine of beta cyclodextrin solution quality 0.1% is then added again, stirs 40min with 200r/min rotating speeds, obtains
To mixed solution；
（2）Every 20min to step（1）Middle mixed solution carries out ultrasonically treated 30s, continues 3 hours, obtains reaction solution；
（3）Rotary evaporation concentrate drying is carried out to reaction solution, solids is obtained, attrition grinding is crossed 300 mesh sieves, produced.
Further, the activated calcium carbonate preparation method is：
（1）To quick lime of the mass fraction for 15% aqueous ammonium chloride solution 100 mesh of addition under continuous stirring condition, liquid-solid ratio is
20:1,2.5h is reacted under the conditions of 72 DEG C of temperature, rotating speed 1200r/min, then calcium chloride slurries are obtained through separation of solid and liquid；
（2）Under the conditions of 35 DEG C of temperature, rotating speed 500r/min, the phosphate of its quality 1% is added into calcium chloride slurries, is stirred
After uniform, pure carbon dioxide is then passed to, fine calcium carbonate slurries is obtained, fine calcium carbonate slurries is dried, then
Crush, cross 400 mesh sieves, produce.
Embodiment 3
A kind of Automobile flywheel shell moulding sand for casting, it is characterised in that be made up by weight of following component：Quartz sand 70, water
Glass 10, α starch crosslinking beta cyclodextrin 7, clay 22, activated calcium carbonate 8, glass fibre 4, water 20；The α starch is formed sediment by corn
Powder is made；
The α starch crosslinking beta cyclodextrin presses 6 by α starch and beta cyclodextrin:3 mass ratio crosslinking is formed.
Further, the quartz sand particle size is 1.0mm.
Further, the clay particle diameter is that particle diameter is 0.4mm.
Further, the waterglass mass fraction is 20% sodium silicate solution.
Further, the α starch crosslinking beta cyclodextrin preparation method is：
（1）Beta cyclodextrin is added to the water dissolving, the beta cyclodextrin solution that mass concentration is 5.8% is made, 40 DEG C are heated to, then
α starch is added, mixed solution is obtained after stirring, uses mass fraction for 3.5% phosphoric acid solution, adjusts mixed solution
PH value is 4.2, and the Diethylenetriamine of beta cyclodextrin solution quality 0.1% is then added again, stirs 40min with 200r/min rotating speeds, obtains
To mixed solution；
（2）Every 20min to step（1）Middle mixed solution carries out ultrasonically treated 30s, continues 3 hours, obtains reaction solution；
（3）Rotary evaporation concentrate drying is carried out to reaction solution, solids is obtained, attrition grinding is crossed 300 mesh sieves, produced.
Further, the activated calcium carbonate preparation method is：
（1）To quick lime of the mass fraction for 15% aqueous ammonium chloride solution 90 mesh of addition under continuous stirring condition, liquid-solid ratio is
20:1,2.5h is reacted under the conditions of 72 DEG C of temperature, rotating speed 1200r/min, then calcium chloride slurries are obtained through separation of solid and liquid；
（2）Under the conditions of 35 DEG C of temperature, rotating speed 500r/min, the phosphate of its quality 1% is added into calcium chloride slurries, is stirred
After uniform, pure carbon dioxide is then passed to, fine calcium carbonate slurries is obtained, fine calcium carbonate slurries is dried, then
Crush, cross 400 mesh sieves, produce.
Comparative example 1：Differed only in embodiment 1 and be crosslinked beta cyclodextrin without α starch.
Comparative example 2：Differed only in embodiment 1 and α starch is crosslinked the α starch that beta cyclodextrin replaces with equivalent.
Comparative example 3：Differed only in embodiment 1 and α starch is crosslinked the beta cyclodextrin that beta cyclodextrin replaces with equivalent.
Comparative example 4：Differed only in embodiment 1 without activated calcium carbonate.
Comparative example 5：The ordinary calcium carbonate that activated calcium carbonate is replaced with to equivalent is differed only in embodiment 1.
Experiment
Performance comparison is carried out to molding sand prepared by embodiment and comparative example, it is saturating using its is determined on the intelligent permeability meters of ZTY
Gas, in its intensity of the intelligent sand bond aircraft measurements of XQ Y- II：
Table 1
| Green compression strength MPa | Gas permeability | |
| Embodiment 1 | 0.043 | 182 |
| Embodiment 2 | 0.042 | 181 |
| Embodiment 3 | 0.044 | 183 |
| Comparative example 1 | 0.022 | 172 |
| Comparative example 2 | 0.028 | 175 |
| Comparative example 3 | 0.024 | 176 |
| Comparative example 4 | 0.032 | 160 |
| Comparative example 5 | 0.036 | 167 |
As can be seen from Table 1, the present invention is crosslinked beta cyclodextrin and activated calcium carbonate by using α starch, being capable of effective raising type
The green compression strength and gas permeability of sand.
Claims (6)
1. a kind of Automobile flywheel shell moulding sand for casting, it is characterised in that be made up by weight of following component：Quartz sand 60-
80th, waterglass 8-12, α starch crosslinking beta cyclodextrin 6-8, clay 18-25, activated calcium carbonate 6-10, glass fibre 3-5, water 15-
30；
The α starch crosslinking beta cyclodextrin presses 5-8 by α starch and beta cyclodextrin:3 mass ratio crosslinking is formed；The α starch by
Cornstarch is made.
2. a kind of Automobile flywheel shell moulding sand for casting according to claim 1, it is characterised in that the quartz sand particle size is
0.8-1.2mm。
3. a kind of Automobile flywheel shell moulding sand for casting according to claim 1, it is characterised in that the clay particle diameter is grain
Footpath is 0.3-0.5mm.
4. a kind of Automobile flywheel shell moulding sand for casting according to claim 1, it is characterised in that the waterglass quality point
Number is 20% sodium silicate solution.
5. a kind of Automobile flywheel shell moulding sand for casting according to claim 1, it is characterised in that the α starch is crosslinked β rings
Dextrin preparation method is：
（1）Beta cyclodextrin is added to the water dissolving, the beta cyclodextrin solution that mass concentration is 5.8% is made, 40 DEG C are heated to, then
α starch is added, mixed solution is obtained after stirring, uses mass fraction for 3.5% phosphoric acid solution, adjusts mixed solution
PH value is 4.2, and the Diethylenetriamine of beta cyclodextrin solution quality 0.1% is then added again, stirs 40min with 200r/min rotating speeds, obtains
To mixed solution；
（2）Every 20min to step（1）Middle mixed solution carries out ultrasonically treated 30s, continues 3 hours, obtains reaction solution；
（3）Rotary evaporation concentrate drying is carried out to reaction solution, solids is obtained, attrition grinding is crossed 300 mesh sieves, produced.
6. a kind of Automobile flywheel shell moulding sand for casting according to claim 1, it is characterised in that the activated calcium carbonate system
Preparation Method is：
（1）To quick lime of the mass fraction for 15% aqueous ammonium chloride solution addition 80-100 mesh, liquid-solid ratio under continuous stirring condition
For 20:1,2.5h is reacted under the conditions of 72 DEG C of temperature, rotating speed 1200r/min, then calcium chloride slurries are obtained through separation of solid and liquid；
（2）Under the conditions of 35 DEG C of temperature, rotating speed 500r/min, the phosphate of its quality 1% is added into calcium chloride slurries, is stirred
After uniform, pure carbon dioxide is then passed to, fine calcium carbonate slurries is obtained, fine calcium carbonate slurries is dried, then
Crush, cross 400 mesh sieves, produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717080.6A CN107262664A (en) | 2017-08-21 | 2017-08-21 | A kind of Automobile flywheel shell moulding sand for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717080.6A CN107262664A (en) | 2017-08-21 | 2017-08-21 | A kind of Automobile flywheel shell moulding sand for casting |
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| Publication Number | Publication Date |
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| CN107262664A true CN107262664A (en) | 2017-10-20 |
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ID=60080512
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710717080.6A Pending CN107262664A (en) | 2017-08-21 | 2017-08-21 | A kind of Automobile flywheel shell moulding sand for casting |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109365741A (en) * | 2018-12-20 | 2019-02-22 | 青岛连山铸造有限公司 | A kind of preparation method casting coupler body molding sand |
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|---|---|---|---|---|
| CN101920981A (en) * | 2009-04-08 | 2010-12-22 | 王嘉兴 | Material recycling method for producing calcium carbonate by ammonium carbonization method |
| CN104084520A (en) * | 2014-06-25 | 2014-10-08 | 芜湖国鼎机械制造有限公司 | Casting sand, mold core and preparation method thereof |
| CN104084523A (en) * | 2014-06-25 | 2014-10-08 | 芜湖国鼎机械制造有限公司 | Molding sand and preparation method thereof |
| CN104229852A (en) * | 2014-09-12 | 2014-12-24 | 中国科学院过程工程研究所 | Surface modification method for fine calcium carbonate prepared by utilizing calcium carbide slag |
| CN104399863A (en) * | 2014-11-07 | 2015-03-11 | 宁国市皖南健身材料有限公司 | Easily-cooled modeling sand for aluminum alloy casting |
| CN104439039A (en) * | 2014-11-05 | 2015-03-25 | 池州埃美柯水表铸造有限公司 | High-dispersity molding sand for casting, and preparation method of high-dispersity molding sand for casting |
| CN106755202A (en) * | 2016-11-28 | 2017-05-31 | 山东正德食品有限公司 | A kind of preparation method of maltose beta cyclodextrin |
-
2017
- 2017-08-21 CN CN201710717080.6A patent/CN107262664A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920981A (en) * | 2009-04-08 | 2010-12-22 | 王嘉兴 | Material recycling method for producing calcium carbonate by ammonium carbonization method |
| CN104084520A (en) * | 2014-06-25 | 2014-10-08 | 芜湖国鼎机械制造有限公司 | Casting sand, mold core and preparation method thereof |
| CN104084523A (en) * | 2014-06-25 | 2014-10-08 | 芜湖国鼎机械制造有限公司 | Molding sand and preparation method thereof |
| CN104229852A (en) * | 2014-09-12 | 2014-12-24 | 中国科学院过程工程研究所 | Surface modification method for fine calcium carbonate prepared by utilizing calcium carbide slag |
| CN104439039A (en) * | 2014-11-05 | 2015-03-25 | 池州埃美柯水表铸造有限公司 | High-dispersity molding sand for casting, and preparation method of high-dispersity molding sand for casting |
| CN104399863A (en) * | 2014-11-07 | 2015-03-11 | 宁国市皖南健身材料有限公司 | Easily-cooled modeling sand for aluminum alloy casting |
| CN106755202A (en) * | 2016-11-28 | 2017-05-31 | 山东正德食品有限公司 | A kind of preparation method of maltose beta cyclodextrin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109365741A (en) * | 2018-12-20 | 2019-02-22 | 青岛连山铸造有限公司 | A kind of preparation method casting coupler body molding sand |
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