CN107457348A - A kind of heavy castings molding sand and preparation method thereof - Google Patents
A kind of heavy castings molding sand and preparation method thereof Download PDFInfo
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- CN107457348A CN107457348A CN201710902075.2A CN201710902075A CN107457348A CN 107457348 A CN107457348 A CN 107457348A CN 201710902075 A CN201710902075 A CN 201710902075A CN 107457348 A CN107457348 A CN 107457348A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of heavy castings molding sand and preparation method thereof, green sand composition includes 10 20 parts of nano-graphite, 5 15 parts of aluminum oxide, 4 12 parts of ferrosilicon powder, 10 20 parts of graphene, 8 18 parts of clay, 10 20 parts of sepiolite powder, 4 12 parts of bentonite, 5 15 parts of new silica sand, 38 parts of tall oil, 28 parts of sodium carbonate, 10 20 parts of water in parts by weight, preparation method of the present invention is simple, obtained molding sand even particle size, hardness is high, suitable for heavy castings, caking property is good, casting dimension is stable, improves casting quality.
Description
Technical field
The present invention relates to casting sand conditioning technical field, specially a kind of heavy castings molding sand and its preparation side
Method.
Background technology
Molding sand is the material for being used for moulding in casting.Molding sand is typically by Foundry sand, moulding sand binder and additional thing
Mixed according to a certain percentage Deng Modeling Material, it is also possible to natural silica sand argillaceous, the sand formulation of common cast aluminium
Sand particle diameter is too big or too small, and molding sand material diameter is too big, although gas permeability is preferable, aloxite part surface is relatively rough, bright and clean
Spend bad, molding sand material diameter is too small, causes mo ld void bad, and aluminium casting has stomata generation.
The content of the invention
It is an object of the invention to provide a kind of heavy castings molding sand and preparation method thereof, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides following technical scheme：A kind of heavy castings molding sand, green sand composition is by weight
Measure number include nano-graphite 10-20 parts, aluminum oxide 5-15 parts, ferrosilicon powder 4-12 parts, graphene 10-20 parts, clay 8-18 parts,
Sepiolite powder 10-20 parts, bentonite 4-12 parts, new silica sand 5-15 parts, tall oil 3-8 parts, sodium carbonate 2-8 parts, water 10-20
Part.
Preferably, the preferable composition proportion of green sand composition includes 15 parts of nano-graphite, 10 parts of aluminum oxide, 8 parts of ferrosilicon powder, stone
Black 15 parts of alkene, 13 parts of clay, 15 parts of sepiolite powder, 8 parts of bentonite, 10 parts of new silica sand, 5 parts of tall oil, 5 parts of sodium carbonate, water
15 parts.
Preferably, its preparation method comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Compared with prior art, the beneficial effects of the invention are as follows：Preparation method of the present invention is simple, and obtained molding sand particle is big
Small uniformly hardness is high, and suitable for heavy castings, caking property is good, and casting dimension is stable, improves casting quality；Added in the present invention
Ferrosilicon powder, graphene, by increasing capacitance it is possible to increase the overall resistance to elevated temperatures of molding sand, in addition, the preparation method operation letter that the present invention uses
It is single, the plasticity, heat endurance, dispersiveness of molding sand can be further increased, low-shrinkage, is obtained through overtesting, the present invention
Obtained molding sand room temperature tensile intensity 0.02Mpa, hot-drawn intensity are more than 0.03Mpa.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
The present invention provides following technical scheme：A kind of heavy castings molding sand, green sand composition include nanometer in parts by weight
Graphite 10-20 parts, aluminum oxide 5-15 parts, ferrosilicon powder 4-12 parts, graphene 10-20 parts, clay 8-18 parts, sepiolite powder 10-20
Part, bentonite 4-12 parts, new silica sand 5-15 parts, tall oil 3-8 parts, sodium carbonate 2-8 parts, water 10-20 parts.
Embodiment one：
Green sand composition includes 10 parts of nano-graphite, 5 parts of aluminum oxide, 4 parts of ferrosilicon powder, 10 parts of graphene, clay 8 in parts by weight
Part, 10 parts of sepiolite powder, 4 parts of bentonite, 5 parts of new silica sand, 3 parts of tall oil, 2 parts of sodium carbonate, 10 parts of water.
The preparation method of the present embodiment comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Embodiment two：
Green sand composition includes 20 parts of nano-graphite, 15 parts of aluminum oxide, 12 parts of ferrosilicon powder, 20 parts of graphene, clay in parts by weight
18 parts, 20 parts of sepiolite powder, 12 parts of bentonite, 15 parts of new silica sand, 8 parts of tall oil, 8 parts of sodium carbonate, 20 parts of water.
The preparation method of the present embodiment comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Embodiment three：
Green sand composition includes 12 parts of nano-graphite, 7 parts of aluminum oxide, 6 parts of ferrosilicon powder, 12 parts of graphene, clay 9 in parts by weight
Part, 12 parts of sepiolite powder, 6 parts of bentonite, 6 parts of new silica sand, 4 parts of tall oil, 3 parts of sodium carbonate, 12 parts of water.
The preparation method of the present embodiment comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Example IV：
Green sand composition includes 18 parts of nano-graphite, 14 parts of aluminum oxide, 10 parts of ferrosilicon powder, 18 parts of graphene, clay in parts by weight
16 parts, 18 parts of sepiolite powder, 10 parts of bentonite, 13 parts of new silica sand, 7 parts of tall oil, 7 parts of sodium carbonate, 18 parts of water.
The preparation method of the present embodiment comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Embodiment five：
Green sand composition includes 16 parts of nano-graphite, 12 parts of aluminum oxide, 10 parts of ferrosilicon powder, 14 parts of graphene, clay in parts by weight
15 parts, 16 parts of sepiolite powder, 9 parts of bentonite, 12 parts of new silica sand, 6 parts of tall oil, 4 parts of sodium carbonate, 16 parts of water.
The preparation method of the present embodiment comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Embodiment six：
Green sand composition includes 15 parts of nano-graphite, 10 parts of aluminum oxide, 8 parts of ferrosilicon powder, 15 parts of graphene, clay 13 in parts by weight
Part, 15 parts of sepiolite powder, 8 parts of bentonite, 10 parts of new silica sand, 5 parts of tall oil, 5 parts of sodium carbonate, 15 parts of water.
The preparation method of the present embodiment comprises the following steps：
A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene
Rev/min, mixing time 25min, obtain mixture A；
B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir
Speed is 1000 revs/min, mixing time 10min, obtains mixture B；
C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed
Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；
D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Preparation method of the present invention is simple, obtained molding sand even particle size, and hardness is high, suitable for heavy castings, bonds
Property it is good, casting dimension is stable, improves casting quality；Ferrosilicon powder, the graphene added in the present invention, by increasing capacitance it is possible to increase molding sand entirety
Resistance to elevated temperatures, in addition, the preparation method that the present invention uses is simple to operate, plasticity, the heat of molding sand can be further increased
Stability, dispersiveness, low-shrinkage, are obtained through overtesting, molding sand room temperature tensile intensity 0.02Mpa produced by the present invention, hot-drawn
Intensity is more than 0.03Mpa.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (3)
- A kind of 1. heavy castings molding sand, it is characterised in that：Green sand composition includes nano-graphite 10-20 parts, oxygen in parts by weight Change aluminium 5-15 parts, ferrosilicon powder 4-12 parts, graphene 10-20 parts, clay 8-18 parts, sepiolite powder 10-20 parts, bentonite 4-12 Part, new silica sand 5-15 parts, tall oil 3-8 parts, sodium carbonate 2-8 parts, water 10-20 parts.
- A kind of 2. heavy castings molding sand according to claim 1, it is characterised in that：The preferable composition proportion of green sand composition Including 15 parts of nano-graphite, 10 parts of aluminum oxide, 8 parts of ferrosilicon powder, 15 parts of graphene, 13 parts of clay, 15 parts of sepiolite powder, bentonite 8 parts, 10 parts of new silica sand, 5 parts of tall oil, 5 parts of sodium carbonate, 15 parts of water.
- 3. realize a kind of preparation method of heavy castings molding sand described in claim 1, it is characterised in that：Its preparation method bag Include following steps：A, stirring at low speed in stirred tank, stir speed (S.S.) 300 are included in after mixing nano-graphite, aluminum oxide, ferrosilicon powder, graphene Rev/min, mixing time 25min, obtain mixture A；B, add in agitator tank and stir after mixing clay, sepiolite powder, bentonite, water is continuously added in whipping process, stir Speed is 1000 revs/min, mixing time 10min, obtains mixture B；C, mixture B is added in mixture A, sequentially adds tall oil, sodium carbonate afterwards, send mixture after being sufficiently mixed Enter in 1450 DEG C of calcining furnaces and calcine 2 hours, taking-up is crushed to 80 mesh, obtains calcining material；D, new silica sand is added in calcining is expected, molding sand is obtained after being thoroughly mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710902075.2A CN107457348A (en) | 2017-09-29 | 2017-09-29 | A kind of heavy castings molding sand and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710902075.2A CN107457348A (en) | 2017-09-29 | 2017-09-29 | A kind of heavy castings molding sand and preparation method thereof |
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| CN107457348A true CN107457348A (en) | 2017-12-12 |
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| CN201710902075.2A Pending CN107457348A (en) | 2017-09-29 | 2017-09-29 | A kind of heavy castings molding sand and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111069525A (en) * | 2020-01-20 | 2020-04-28 | 陈仁清 | High-temperature-resistant inorganic plasticizer and preparation method thereof |
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| CN104174809A (en) * | 2014-08-22 | 2014-12-03 | 合肥江淮铸造有限责任公司 | Recyclable casting molding sand with good air permeability and preparation method of sand |
| CN104475662A (en) * | 2014-12-01 | 2015-04-01 | 昌利锻造有限公司 | Molding sand for magnesium alloy castings and preparation method of molding sand |
| CN104668440A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Environment-friendly casting coated sand and method for preparing the coated sand |
| CN104841857A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Heat resistant casting sand for heavy casting and preparation method of heat resistant casting sand |
| CN104841874A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Moulding sand for middle-large size castings and preparation method thereof |
-
2017
- 2017-09-29 CN CN201710902075.2A patent/CN107457348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057017A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Molding sand for large-size cast piece and preparation method thereof |
| CN104174809A (en) * | 2014-08-22 | 2014-12-03 | 合肥江淮铸造有限责任公司 | Recyclable casting molding sand with good air permeability and preparation method of sand |
| CN104475662A (en) * | 2014-12-01 | 2015-04-01 | 昌利锻造有限公司 | Molding sand for magnesium alloy castings and preparation method of molding sand |
| CN104668440A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Environment-friendly casting coated sand and method for preparing the coated sand |
| CN104841857A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Heat resistant casting sand for heavy casting and preparation method of heat resistant casting sand |
| CN104841874A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Moulding sand for middle-large size castings and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111069525A (en) * | 2020-01-20 | 2020-04-28 | 陈仁清 | High-temperature-resistant inorganic plasticizer and preparation method thereof |
| CN111069525B (en) * | 2020-01-20 | 2020-10-23 | 陈仁清 | High-temperature-resistant inorganic plasticizer and preparation method thereof |
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Application publication date: 20171212 |
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