CN102728783B - Molding sand using dextrin as binder and preparation method thereof - Google Patents
Molding sand using dextrin as binder and preparation method thereof Download PDFInfo
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- CN102728783B CN102728783B CN201210186992.2A CN201210186992A CN102728783B CN 102728783 B CN102728783 B CN 102728783B CN 201210186992 A CN201210186992 A CN 201210186992A CN 102728783 B CN102728783 B CN 102728783B
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- dextrin
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Abstract
The invention discloses a molding sand using dextrin as binder and a preparation method thereof. The method is as below: weighing raw materials of 30-40 parts of recycling sand, 40-50 parts of quartz sand,10-20 parts of vermiculite, 5-10 parts of steel fiber, 3-8parts of furan resin, 3-5 parts of dextrin, 1-3 parts of gypsum and a proper amount of water; mixing the raw materials evenly; carrying out dry mixing for 3-5 minutes; then adding water; carrying out wet mixing for 5-8 minutes; and then drying at 250-350 DEG C; and carrying out alloy casting mold casting to obtain the molding sand. The molding sand using dextrin as binder of the invention has reasonable formula; usage of steel fiber can increase the strength of the molding sand; meanwhile, the usage of gypsum and dextrin increases the adhesion and reduces broken rate.
Description
Technical field
The present invention relates to casting technology field, be specifically related to a kind of molding sand that dextrin is binding agent and preparation method thereof of take.
Background technology
The effect of molding sand in Foundry Production is very important, the casting wasted product causing because of the poor quality of molding sand accounts for 30～50% of the total waste product of foundry goods, conventionally the requirement of molding sand is had to intensity and heat endurance, mobility, plasticity, gas permeability and collapsibility, after casting solidification, whether molding sand easily destroys, the performance of whether easily removing from foundry goods.
At present, in the preparation process of molding sand, generally by fresh sand, old sand, binding agent and auxiliary material, be mixed by a certain percentage.
Summary of the invention
In order to alleviate shortcomings and deficiencies of the prior art, the object of the present invention is to provide a kind of molding sand that dextrin is binding agent and preparation method thereof of take.Of the present invention to take the sand formulation that dextrin is binding agent reasonable, adopts steel fibre can increase sand bond, meanwhile, adopts gypsum, dextrin to increase caking property, and percentage of damage declines.
The present invention adopts following technical scheme to achieve these goals:
The molding sand that the dextrin of take is binding agent, the weight portion of its constitutive material is: return sand 30-40, quartz sand 40-50, vermiculite 10-20, steel fibre 5-10, furane resins 3-8, dextrin 3-5, gypsum 1-3 and water are appropriate
The molding sand that the dextrin of take is binding agent, the weight portion of its constitutive material is that return sand 35, quartz sand 45, vermiculite 15, steel fibre 8, furane resins 5, dextrin 4, gypsum 2 and water are appropriate.
Beneficial effect of the present invention:
Of the present invention to take the sand formulation that dextrin is binding agent reasonable, adopts steel fibre can increase sand bond, meanwhile, adopts gypsum, dextrin to increase caking property, and percentage of damage declines.
The specific embodiment
Embodiment 1: the molding sand that the dextrin of take is binding agent, the weight portion of its constitutive material is: return sand 40, quartz sand 50, vermiculite 20, steel fibre 10, furane resins 8, dextrin 5, gypsum 3 and water are appropriate.
The preparation method of the molding sand that the dextrin of take is binding agent, comprising: by the weight portion of constitutive material, take return sand, quartz sand, vermiculite, steel fibre, furane resins, dextrin and gypsum, mix, be dry mixed 3-5 minute, then add water, wet mixing 5-8 minute.
Embodiment 2: the molding sand that the dextrin of take is binding agent, the weight portion of its constitutive material is that return sand 35, quartz sand 45, vermiculite 15, steel fibre 8, furane resins 5, dextrin 4, gypsum 2 and water are appropriate.
The preparation method of the molding sand that the dextrin of take is binding agent, comprising: by the weight portion of constitutive material, take return sand, quartz sand, vermiculite, steel fibre, furane resins, dextrin and gypsum, mix, be dry mixed 3-5 minute, then add water, wet mixing 5-8 minute.
Embodiment 3: the molding sand that the dextrin of take is binding agent, the weight portion of its constitutive material is: return sand 40, quartz sand 50, vermiculite 20, steel fibre 10, furane resins 8, dextrin 5, gypsum 3 and water are appropriate.
The preparation method of the molding sand that the dextrin of take is binding agent, comprising: by the weight portion of constitutive material, take return sand, quartz sand, vermiculite, steel fibre, furane resins, dextrin and gypsum, mix, be dry mixed 3-5 minute, then add water, wet mixing 5-8 minute.
The moulding-sand property that the present invention makes: green compression strength >=0.13Mpa, gas permeability >=82, moisture 3.3-3.8, compact rate of molding 45-55, shatter index (j :) 83-85%.
Claims (2)
1. the molding sand that the dextrin of take is binding agent, is characterized in that the weight portion of its constitutive material is: return sand 30-40, quartz sand 40-50, vermiculite 10-20, steel fibre 5-10, furane resins 3-8, dextrin 3-5, gypsum 1-3 and water are appropriate.
2. according to claim 1ly take the molding sand that dextrin is binding agent, the weight portion that it is characterized in that its constitutive material is that return sand 35, quartz sand 45, vermiculite 15, steel fibre 8, furane resins 5, dextrin 4, gypsum 2 and water are appropriate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210186992.2A CN102728783B (en) | 2012-06-08 | 2012-06-08 | Molding sand using dextrin as binder and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210186992.2A CN102728783B (en) | 2012-06-08 | 2012-06-08 | Molding sand using dextrin as binder and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102728783A CN102728783A (en) | 2012-10-17 |
| CN102728783B true CN102728783B (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210186992.2A Active CN102728783B (en) | 2012-06-08 | 2012-06-08 | Molding sand using dextrin as binder and preparation method thereof |
Country Status (1)
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| CN (1) | CN102728783B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521689A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Molding sand for recycling old sand and preparation method thereof |
| CN103495694A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | Yellow-soil foundry sand and preparation method thereof |
| CN105033167A (en) * | 2015-07-06 | 2015-11-11 | 安徽三联泵业股份有限公司 | Modified pump body casting foundry sand with furan resin loaded with nanosized graphite |
| CN106111883A (en) * | 2016-08-18 | 2016-11-16 | 娄土岭 | A kind of multi-function casting moulding sand and manufacture method thereof |
| CN108296417B (en) * | 2017-09-29 | 2020-05-01 | 柳州市柳晶科技股份有限公司 | Precoated sand for laser sintering and 3D printing technology and preparation method thereof |
| FR3090671B1 (en) * | 2018-12-20 | 2022-05-27 | Saint Gobain Isover | GLUING COMPOSITION BASED ON FURANIC RESIN, REDUCING SUGAR AND/OR NON-REDUCING SUGAR |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB834876A (en) * | 1957-09-05 | 1960-05-11 | Mo Och Domsjoe Ab | Method of making sand moulds or cores for metal casting |
| US3179523A (en) * | 1960-11-21 | 1965-04-20 | Mo Och Domsjoe Ab | Methods of making foundry cores and moulds |
| GB1007360A (en) * | 1962-05-09 | 1965-10-13 | Mo Och Domsjoe Ab | Mould or core composition for metal casting purposes |
| CN1109806A (en) * | 1995-03-15 | 1995-10-11 | 张庆友 | Moulding sand adhesive for casting |
-
2012
- 2012-06-08 CN CN201210186992.2A patent/CN102728783B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB834876A (en) * | 1957-09-05 | 1960-05-11 | Mo Och Domsjoe Ab | Method of making sand moulds or cores for metal casting |
| US3179523A (en) * | 1960-11-21 | 1965-04-20 | Mo Och Domsjoe Ab | Methods of making foundry cores and moulds |
| GB1007360A (en) * | 1962-05-09 | 1965-10-13 | Mo Och Domsjoe Ab | Mould or core composition for metal casting purposes |
| CN1109806A (en) * | 1995-03-15 | 1995-10-11 | 张庆友 | Moulding sand adhesive for casting |
Non-Patent Citations (2)
| Title |
|---|
| 利用纤维强化砂型;古田章彦;《铁道机车车辆工人》;20010731(第7期);第30页第1段-第3段 * |
| 古田章彦.利用纤维强化砂型.《铁道机车车辆工人》.2001,(第7期), |
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| CN102728783A (en) | 2012-10-17 |
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Address after: 241200 Sun Cun Zhen Li Shan Cun, Fanchang County, Wuhu City, Anhui Province Patentee after: Fanchang Qixiang foundry (general partnership) Address before: 241200 Sun Cun Zhen Li Shan Cun, Fanchang County, Wuhu City, Anhui Province Patentee before: FANCHANG COUNTY QIXIANG CASTING FACTORY |
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