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CN102728783B - Molding sand using dextrin as binder and preparation method thereof - Google Patents

Molding sand using dextrin as binder and preparation method thereof Download PDF

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Publication number
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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China
Prior art keywords
dextrin
sand
molding sand
parts
gypsum
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CN201210186992.2A
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Chinese (zh)
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CN102728783A (en
Inventor
孙修财
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanchang Qixiang foundry (general partnership)
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FANCHANG QIXIANG CASTING FACTORY
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Priority to CN201210186992.2A priority Critical patent/CN102728783B/en
Publication of CN102728783A publication Critical patent/CN102728783A/en
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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

A kind ofly take molding sand that dextrin is binding agent and preparation method thereof
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.
CN201210186992.2A 2012-06-08 2012-06-08 Molding sand using dextrin as binder and preparation method thereof Active CN102728783B (en)

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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Families Citing this family (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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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

CP01 Change in the name or title of a patent holder