CN105081197A - Modified furan resin sand containing nano-mesoporous alumina and used for steel castings and preparation method thereof - Google Patents
Modified furan resin sand containing nano-mesoporous alumina and used for steel castings and preparation method thereof Download PDFInfo
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- CN105081197A CN105081197A CN201510496572.8A CN201510496572A CN105081197A CN 105081197 A CN105081197 A CN 105081197A CN 201510496572 A CN201510496572 A CN 201510496572A CN 105081197 A CN105081197 A CN 105081197A
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Abstract
The invention discloses modified furan resin sand containing nano-mesoporous alumina and used for steel castings. According to the resin sand, reused sand, quartz sand and nano silicon carbide of different grain diameters and different proportions are used as moulding sand, and after high-temperature pouring, air permeability is good, and high temperature resistance is achieved; adding of nano tourmaline powder further improves the air permeability of the moulding sand, and compared with traditional furan resin, prepared modified furan resin adhesives containing the nano-mesoporous alumina have the advantages of being low in gas-forming amount, few in organism residue, low in viscosity, high in adhesive strength, high in strength, high in adsorbability and the like, the utilization rate is higher, and the use amount is smaller; the prepared moulding sand is good in fluidity, high in strength, good in temperature resistance and permeable to air and moist, and the quality of obtained steel castings is effectively improved.
Description
Technical field
The present invention relates to cast steel molding sand manufacturing technology field, particularly relate to a kind of steel-casting modified furan resin sand containing mesoporous nano-alumina and preparation method thereof.
Background technology
The quality of foundry goods is directly connected in the quality of the casting process Sand of steel part, molding sand is mainly mixed according to different ratios by Modeling Materials such as sand material, bonding agent and adminiclies, bonding agent is wherein the important Modeling Material of a class, the height of its comprehensive quality is directly connected to surface quality and the inherent quality of foundry goods, and current the most widely used bonding agent is mainly with clay-bonded sand, the water-glass sand inorganic adhesive that is representative and take furane resins as the resin adhesive of representative.
The advantages such as it is good that furan resin-sand has casting quality, and percent defective is low, but still there is a lot of defect in it, needs to set about in its synthesis material and preparation technology etc. in actual production, improves its performance.Mainly there is following problem in furan resin-sand: gas forming amount is high, causes high, the high utilization rate of bleb rate to cause the easy hot tearing of foundry goods, poor fluidity, depot difference, residues of formaldehyde height etc.Therefore a kind of efficient, low toxicity of necessary development, effectively improve the modified furan resin sand of casting quality, to adapt to the fast-developing demand of industry.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of steel-casting modified furan resin sand containing mesoporous nano-alumina and preparation method thereof.
The present invention is achieved by the following technical solutions:
The modified furan resin sand of steel-casting containing mesoporous nano-alumina, this resin sand is prepared by the raw material of following weight portion: 80-100 order return sand 20-30,50-80 order quartz sand 30-40, nanometer silicon carbide 4-5, nano-tourmaline powder 0.1-0.2, polyamide wax powder 2-3, modified furan resin bonding agent 0.5-0.6, curing agent 0.2-0.3.
The modified furan resin sand of described a kind of steel-casting containing mesoporous nano-alumina, described modified furan resin bonding agent is made up of the raw material of following weight portion: 37% formalin 15-20, urea 5-6, furfuryl alcohol 40-50, ferrocene 0.1-0.2, phenol 4-5,30% sodium hydrate aqueous solution appropriate, 10% hydrochloric acid solution is appropriate, Emulsifier EL-60 0.1-0.2, mesoporous nano-alumina 2-3, silane coupler kh5500.1-0.2, its preparation method is: first by phenol, the urea of 3-4 weight portion, Emulsifier EL-60 and formalin drop in reactor, stir after material being dissolved completely mix and add appropriate sodium hydrate aqueous solution, mixed liquor pH value is regulated to be 8.0-9.0, be heated to 90-100 DEG C subsequently, confined reaction 75-80min, the furfuryl alcohol of 30-40 weight portion is added after reaction terminates, and regulate pH value of reaction system to be 5.0-6.0 with hydrochloric acid solution, under 95-100 DEG C of condition, constant temperature continues reaction 80-90min, 60-70 DEG C is cooled to after reaction terminates, vacuum dehydration process, other leftover materials are added again after dehydration, after being fully uniformly mixed and get final product.
Described a kind of steel-casting preparation method of the modified furan resin sand containing mesoporous nano-alumina, described preparation method is: first return sand, quartz sand, nanometer silicon carbide are added curing agent after dropping into and mixing in puddle mixer, be uniformly mixed 4-5min, then modified furan resin bonding agent is added, continue to be uniformly mixed 5-8min, finally add other leftover materials again, shake out after being uniformly mixed 8-10min and get final product.
Advantage of the present invention is: select the return sand of different-grain diameter, different ratio, quartz sand and nanometer silicon carbide as moulding sand material, good permeability after high temperature cast, high temperature resistant, the interpolation of nano-tourmaline powder enhances type sand permeability further, and the modified furan resin bonding agent containing mesoporous nano-alumina of preparation has the advantages such as gas forming amount is low, organic substance residues is few, viscosity is low, bonding force is strong, intensity is large, adsorptivity is strong compared with traditional furane resins, utilization rate is higher, and consumption is less; The sand fluidity prepared is good, intensity is high, and temperature tolerance is good, air-moisture-permeable, and the steel casting quality obtained effectively is improved.
Detailed description of the invention
The modified furan resin sand of steel-casting containing mesoporous nano-alumina, this resin sand is prepared by the raw material of following weight portion: 80 order return sand 20,50 order quartz sands 30, nanometer silicon carbide 4, nano-tourmaline powder 0.1, polyamide wax powder 2, modified furan resin bonding agent 0.5, curing agent 0.2.
Described modified furan resin bonding agent is made up of the raw material of following weight portion: the sodium hydrate aqueous solution of 37% formalin 15, urea 5, furfuryl alcohol 40, ferrocene 0.1, phenol 4,30% is appropriate, 10% hydrochloric acid solution is appropriate, Emulsifier EL-60 0.1, mesoporous nano-alumina 2, silane coupler kh5500.1, its preparation method is: first by phenol, the urea of 3 weight portions, Emulsifier EL-60 and formalin drop in reactor, stir after material being dissolved completely mix and add appropriate sodium hydrate aqueous solution, mixed liquor pH value is regulated to be 8.0, be heated to 90 DEG C subsequently, confined reaction 75min, the furfuryl alcohol of 30 weight portions is added after reaction terminates, and regulate pH value of reaction system to be 5.0 with hydrochloric acid solution, under 95 DEG C of conditions, constant temperature continues reaction 80min, 60 DEG C are cooled to after reaction terminates, vacuum dehydration process, other leftover materials are added again after dehydration, after being fully uniformly mixed and get final product.
The preparation method of described resin sand is: first return sand, quartz sand, nanometer silicon carbide are added curing agent after dropping into and mixing in puddle mixer, be uniformly mixed 4min, then modified furan resin bonding agent is added, continue to be uniformly mixed 5min, finally add other leftover materials again, shake out after being uniformly mixed 8min and get final product.
The nitrogen content of the modified furan resin bonding agent obtained by the present embodiment is 4.2%, and free formaldehyde content is 0.05%, and viscosity is 23g/cm
3, the resin mass tensile strength after solidification can reach 1.45MPa.The casting yield being poured into a mould gained by this composite sand reaches more than 95%, and cast(ing) surface densification is bright and clean, and contraction cavity ratio is low, and size is accurate.
Claims (3)
1. the modified furan resin sand of a steel-casting containing mesoporous nano-alumina, it is characterized in that, this resin sand is prepared by the raw material of following weight portion: 80-100 order return sand 20-30,50-80 order quartz sand 30-40, nanometer silicon carbide 4-5, nano-tourmaline powder 0.1-0.2, polyamide wax powder 2-3, modified furan resin bonding agent 0.5-0.6, curing agent 0.2-0.3.
2. the modified furan resin sand of a kind of steel-casting as claimed in claim 1 containing mesoporous nano-alumina, it is characterized in that, described modified furan resin bonding agent is made up of the raw material of following weight portion: 37% formalin 15-20, urea 5-6, furfuryl alcohol 40-50, ferrocene 0.1-0.2, phenol 4-5,30% sodium hydrate aqueous solution appropriate, 10% hydrochloric acid solution appropriate, Emulsifier EL-60 0.1-0.2, mesoporous nano-alumina 2-3, silane coupler kh5500.1-0.2, its preparation method is: first by phenol, the urea of 3-4 weight portion, Emulsifier EL-60 and formalin drop in reactor, stir after material being dissolved completely mix and add appropriate sodium hydrate aqueous solution, mixed liquor pH value is regulated to be 8.0-9.0, be heated to 90-100 DEG C subsequently, confined reaction 75-80min, the furfuryl alcohol of 30-40 weight portion is added after reaction terminates, and regulate pH value of reaction system to be 5.0-6.0 with hydrochloric acid solution, under 95-100 DEG C of condition, constant temperature continues reaction 80-90min, 60-70 DEG C is cooled to after reaction terminates, vacuum dehydration process, other leftover materials are added again after dehydration, after being fully uniformly mixed and get final product.
3. a kind of steel-casting as claimed in claim 1 preparation method of the modified furan resin sand containing mesoporous nano-alumina, it is characterized in that, described preparation method is: first return sand, quartz sand, nanometer silicon carbide are added curing agent after dropping into and mixing in puddle mixer, be uniformly mixed 4-5min, then modified furan resin bonding agent is added, continue to be uniformly mixed 5-8min, finally add other leftover materials again, shake out after being uniformly mixed 8-10min and get final product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860648A (en) * | 2019-10-15 | 2020-03-06 | 王海江 | Casting process method for improving appearance of casting sand grains and improving strength of sand mold |
Citations (5)
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|---|---|---|---|---|
| CN1060616A (en) * | 1990-09-30 | 1992-04-29 | 国营青岛电站阀门厂 | Moulding sand for casting |
| CN102380576A (en) * | 2011-11-03 | 2012-03-21 | 铜陵和武机械制造有限责任公司 | Mixed casting molding sand and preparation method thereof |
| CN103113548A (en) * | 2013-03-06 | 2013-05-22 | 苏州兴业材料科技股份有限公司 | Preparation method of novel modified furan resin for casting |
| CN103289037A (en) * | 2013-04-01 | 2013-09-11 | 黄石市汇波防腐技术有限公司 | Furan resin having a low formaldehyde content and good collapsibility used for casting |
| CN104107875A (en) * | 2014-07-30 | 2014-10-22 | 吴江市液铸液压件铸造有限公司 | Furan resin self-hardening sand and preparation method thereof |
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2015
- 2015-08-14 CN CN201510496572.8A patent/CN105081197A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060616A (en) * | 1990-09-30 | 1992-04-29 | 国营青岛电站阀门厂 | Moulding sand for casting |
| CN102380576A (en) * | 2011-11-03 | 2012-03-21 | 铜陵和武机械制造有限责任公司 | Mixed casting molding sand and preparation method thereof |
| CN103113548A (en) * | 2013-03-06 | 2013-05-22 | 苏州兴业材料科技股份有限公司 | Preparation method of novel modified furan resin for casting |
| CN103289037A (en) * | 2013-04-01 | 2013-09-11 | 黄石市汇波防腐技术有限公司 | Furan resin having a low formaldehyde content and good collapsibility used for casting |
| CN104107875A (en) * | 2014-07-30 | 2014-10-22 | 吴江市液铸液压件铸造有限公司 | Furan resin self-hardening sand and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860648A (en) * | 2019-10-15 | 2020-03-06 | 王海江 | Casting process method for improving appearance of casting sand grains and improving strength of sand mold |
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Application publication date: 20151125 |