CN107971452A - Ironcasting high density moulding green-sand and preparation method thereof - Google Patents
Ironcasting high density moulding green-sand and preparation method thereof Download PDFInfo
- Publication number
- CN107971452A CN107971452A CN201711219557.4A CN201711219557A CN107971452A CN 107971452 A CN107971452 A CN 107971452A CN 201711219557 A CN201711219557 A CN 201711219557A CN 107971452 A CN107971452 A CN 107971452A
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- Prior art keywords
- sand
- quartz
- high density
- old
- ironcasting
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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
-
- 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 ironcasting high density moulding green-sand and preparation method thereof, it is made of the raw material of following parts by weight：Bentonite 0.5~2, mixture soil 0.2~1 (mixture local soil type becomes high-efficiency pulverized coal 70~85, bentonite 10~25, alkalization lignite 2~5, pitch 3~5, α starch 2~5), quartz sand fresh sand 0~5, quartz sand old sand 95~99, water surplus.The present invention not only has higher green compression strength and hot green tensile strength, and also with excellent gas permeability, mobility and surface drying, and sand conditioning technique of the present invention is simple, and manufacture cost is low, suitable for large-scale promotion application in high density moulding.
Description
Technical field
The present invention relates to a kind of ironcasting high density moulding green-sand and preparation method thereof, belong to molding sand technical field.
Background technology
At present, high density moulding such as high pressure, gas is rushed, extruded, penetrating the moulding lines such as pressure, static pressure with clay green-sand work
For its Foundry quartz sand, green-sand quality directly affects product quality.Therefore, green-sand quality is controlled to make batch production
Type production line is most important.
Sand casting is most common casting method, and green-sand is efficient because its production cost is low, is current formative technology
In most important Modeling Material.The quality of Quality of sand mold directly affects the surface quality of casting and casting produces sand hole, stomata, folder
The casting flaws such as sand, rat-tail, groove.The waste product of green-sand casting is caused by molding sand quality problem or improper use
, moulding-sand property difference is to cause the principal element of casting defect.With the continuous development of foundry engieering, performance to molding sand and will
Ask also higher and higher.At present, in the market be used for ironcasting high density moulding green-sand there is poor, price of comprehensive performance etc.
Shortcoming, so as to seriously affect the quality of casting.Therefore, a kind of ironcasting high density moulding wet type of excellent combination property is developed
Sand has great importance.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of ironcasting high density of excellent combination property
Moulding green-sand and preparation method thereof.
The present invention is achieved by the following technical solutions：
The present invention provides a kind of ironcasting high density moulding green-sand, it include counting in parts by weight such as the following group
Point：
The gross weight of each component is 100 parts.
Preferably, the mixture soil includes the following component counted in parts by weight：
Preferably, the quartz sand fresh sand is common quartz sand, and granularity is 50~140 mesh, and water content is no more than
0.1%；The quartz sand old sand be through sieving, magnetic separation, dedusting, moisturizing, cooling and awake sand pretreatment quartz sand, sand Wen Buchao
Cross 15 DEG C of room temperature, summer is no more than 40 DEG C, and clay content is 10~12%, and effective bentonite content is 5~8%, loss on ignition for 3~
5%.
A kind of preparation method of ironcasting high density moulding green-sand as the aforementioned, it includes the following steps：
After quartz sand old sand is pre-processed, put into bentonite, mixture soil, quartz sand fresh sand in sand mixer, it is dry-mixed
30~100s；
After addition water carries out 50~200s of wetting, discharging, the fluffing of moulding sand.
Preferably, the dosage of the water is quartz sand old sand, quartz sand fresh sand, bentonite, mixture soil gross weight
3~4.5%.
Preferably, the preprocess method of the quartz sand old sand is：
By quartz sand old sand through sieving, magnetic separation, dedusting, moisturizing, cooling and awake sand, it is ensured that before quartz sand old sand moisture mulling
The 60~70% of sand humidity are maintained at, quartz sand old sand temperature is no more than 15 DEG C of room temperature, and summer is no more than 40 DEG C, quartz sand old sand
Clay content is 10~12%, and effectively bentonite content is 5~8% in quartz sand old sand, and loss on ignition is 3~5%.
Compared with prior art, the present invention has following beneficial effect：
1st, the present invention can not only improve the mobility, gas permeability and surface drying of molding sand, while can also increase molding sand
The performances such as caking property, heat resistance, wet strength and hot green tensile strength, so that ensure that the comprehensive performance and quality stability of molding sand,
The appearance for the defects of reaching improvement surface quality of continuous castings, avoiding casting scab, sand hole, burning into sand, stomata；
2nd, sand conditioning technique of the present invention is simple, and manufacture cost is low, suitable for large-scale promotion application in high density moulding；
3rd, the present invention mixes Foundry Production suitable for placer iron than the ironcasting high density moulding changed greatly, it is not necessary to because
The change of product or material and frequently adjust molding sand proportion；
4th, the bentonite in mixture soil can prevent spontaneous combustion of pulverized coal problem, can effectively solve to cast substantially as fire retardant
Make security risk of factory's coal dust summer storage there are spontaneous combustion.In addition, add bentonite in mixture soil.It can make the moisture of mixture soil
The more single coal dust of control is high, advantageously reduces airborne dust；
5th, alkalization lignite can adsorb the pernicious gas such as coal dust and the benzene homologues of resin burning release, can be effectively improved factory
Environment, alleviates environmental protection pressure.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following embodiments will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1
The present embodiment is related to a kind of ironcasting high density moulding green-sand, it is made of the raw material of following parts by weight：It is swollen
Profit soil 0.5~2, mixture soil 0.2~1 (mixture local soil type become high-efficiency pulverized coal 70~85, bentonite 10~25, alkalization lignite 2~5,
Pitch 3~5, α starch 2~5), quartz sand fresh sand 0~5, quartz sand old sand 95~99, water surplus.
A kind of preparation method of high density moulding green-sand, comprises the following steps：
(1) quartz sand old sand is through sieving, magnetic separation, moisturizing, cooling, the processing such as sand of waking up, it is ensured that is kept before old sand moisture mulling
The 60~70% of sand humidity, preferably stablize in 1.5~2.5%, such as sand humidity requirement 3.2%, then old sand moisture stabilization
1.92~2.24%.Old sand sand temperature is not higher than 15 DEG C of room temperature, summer≤40 DEG C；Old sand clay content is controlled 10~12%；It is old
The effective bentonite content control of sand is 5~8%；Old sand loss on ignition is controlled 3~5%.
(2) bentonite, mixture soil, quartz sand fresh sand, quartz sand old sand are proportionally added into the dry-mixed 30~100s of sand mixer,
Then plus water 50~200s of wet mixing of mixture weight 3~4.5% is accounted for, through discharging, the fluffing of moulding sand.
Moulding-sand property test is as shown in the table made from above-described embodiment：
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (6)
1. a kind of ironcasting high density moulding green-sand, it is characterised in that including the following component counted in parts by weight：
The gross weight of each component is 100 parts.
2. ironcasting high density moulding green-sand as claimed in claim 1, it is characterised in that the mixture soil is included by weight
Measure the following component of number meter：
3. ironcasting high density moulding green-sand as claimed in claim 1, it is characterised in that the quartz sand fresh sand is general
Logical quartz sand, granularity are 50~140 mesh, and water content is no more than 0.1%；The quartz sand old sand be through sieving, magnetic separation, dedusting,
The quartz sand of moisturizing, cooling and the pretreatment of awake sand, sand temperature are no more than 15 DEG C of room temperature, summer no more than 40 DEG C, clay content is 10~
12%, effective bentonite content is 5~8%, and loss on ignition is 3~5%.
A kind of 4. preparation method of ironcasting high density moulding green-sand as claimed in claim 1, it is characterised in that including
Following steps：
After quartz sand old sand is pre-processed, put into bentonite, mixture soil, quartz sand fresh sand in sand mixer, dry-mixed 30~
100s；
After addition water carries out 50~200s of wetting, discharging, the fluffing of moulding sand.
5. the preparation method of ironcasting high density moulding green-sand as claimed in claim 4, it is characterised in that the water
Dosage is quartz sand old sand, quartz sand fresh sand, bentonite, the 3~4.5% of mixture soil gross weight.
6. the preparation method of ironcasting high density moulding green-sand as claimed in claim 4, it is characterised in that the quartz
The preprocess method of sand old sand is：
By quartz sand old sand through sieving, magnetic separation, dedusting, moisturizing, cooling and awake sand, it is ensured that kept before quartz sand old sand moisture mulling
The 60~70% of sand humidity, quartz sand old sand temperature is no more than 15 DEG C of room temperature, and summer is no more than 40 DEG C, and quartz sand old sand contains mud
Measure as 10~12%, effectively bentonite content is 5~8% in quartz sand old sand, and loss on ignition is 3~5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219557.4A CN107971452B (en) | 2017-11-28 | 2017-11-28 | Green sand for high-density molding of iron casting and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219557.4A CN107971452B (en) | 2017-11-28 | 2017-11-28 | Green sand for high-density molding of iron casting and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107971452A true CN107971452A (en) | 2018-05-01 |
| CN107971452B CN107971452B (en) | 2020-07-17 |
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| CN201711219557.4A Active CN107971452B (en) | 2017-11-28 | 2017-11-28 | Green sand for high-density molding of iron casting and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108436027A (en) * | 2018-07-02 | 2018-08-24 | 山东建筑大学 | A kind of clay old sand wet reclamation generates the resource utilization method of sludge |
| CN109530611A (en) * | 2018-12-31 | 2019-03-29 | 广西玉柴机器股份有限公司 | A method of using Foundry mixture molding sand |
| CN109604516A (en) * | 2019-01-28 | 2019-04-12 | 曲阜冶通铸材科技发展有限公司 | A kind of moulding sand additive |
| CN110479951A (en) * | 2019-08-29 | 2019-11-22 | 赤峰市建支管业有限公司 | A kind of malleable cast iron pipe fitting casting green sand core molding sand |
| CN110814272A (en) * | 2019-11-08 | 2020-02-21 | 姚立猛 | Environment-friendly mixed soil for wet mold casting and preparation method thereof |
| CN111112547A (en) * | 2020-01-21 | 2020-05-08 | 大连冰山金属技术有限公司 | Molding sand regeneration treatment process and system |
| CN113523179A (en) * | 2021-06-10 | 2021-10-22 | 安徽海立精密铸造有限公司 | Molding sand for casting vermicular iron flywheel and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108436027A (en) * | 2018-07-02 | 2018-08-24 | 山东建筑大学 | A kind of clay old sand wet reclamation generates the resource utilization method of sludge |
| CN109530611A (en) * | 2018-12-31 | 2019-03-29 | 广西玉柴机器股份有限公司 | A method of using Foundry mixture molding sand |
| CN109604516A (en) * | 2019-01-28 | 2019-04-12 | 曲阜冶通铸材科技发展有限公司 | A kind of moulding sand additive |
| CN110479951A (en) * | 2019-08-29 | 2019-11-22 | 赤峰市建支管业有限公司 | A kind of malleable cast iron pipe fitting casting green sand core molding sand |
| CN110814272A (en) * | 2019-11-08 | 2020-02-21 | 姚立猛 | Environment-friendly mixed soil for wet mold casting and preparation method thereof |
| CN110814272B (en) * | 2019-11-08 | 2022-01-04 | 姚立猛 | Environment-friendly mixed soil for wet mold casting and preparation method thereof |
| CN111112547A (en) * | 2020-01-21 | 2020-05-08 | 大连冰山金属技术有限公司 | Molding sand regeneration treatment process and system |
| CN113523179A (en) * | 2021-06-10 | 2021-10-22 | 安徽海立精密铸造有限公司 | Molding sand for casting vermicular iron flywheel and preparation method thereof |
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| CN107971452B (en) | 2020-07-17 |
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