CN105081203A - Purple-grit-mud-containing high-permeability modified furan resin sand for steel casting and preparation method of purple-grit-mud-containing high-permeability modified furan resin sand - Google Patents
Purple-grit-mud-containing high-permeability modified furan resin sand for steel casting and preparation method of purple-grit-mud-containing high-permeability modified furan resin sand Download PDFInfo
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- CN105081203A CN105081203A CN201510497166.3A CN201510497166A CN105081203A CN 105081203 A CN105081203 A CN 105081203A CN 201510497166 A CN201510497166 A CN 201510497166A CN 105081203 A CN105081203 A CN 105081203A
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Abstract
The invention discloses purple-grit-mud-containing high-permeability modified furan resin sand for a steel casting. Fine magnesia, quartz sand and purple grit mud of different particle sizes and different ratios are selected as moulding sand materials of the resin sand, and after high-temperature pouring, porosity is good, and permeability is high. The permeability of moulding sand is further increased through adding of nanometer tourmaline powder. Compared with traditional furan resin, prepared modified furan resin adhesives with nanometer sepiolite have the beneficial effects of being low in gas forming amount, few in organic matter residue, low in viscosity, high in adhesive force, good in adsorbability, high in strength and the like, the utilization rate is higher, and the use level is low. The moulding sand obtained through preparation is easily molded, and is stable for heat and prone to being scattered and arranged, the quality of the obtained steel casting is effectively improved, and the yield of finished products is high.
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 and preparation method thereof of breathing freely containing the height of purple clay.
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 and preparation method thereof of breathing freely containing the height of purple clay.
The present invention is achieved by the following technical solutions:
A steel-casting modified furan resin sand of breathing freely containing the height of purple clay, this resin sand is prepared by the raw material of following weight portion: 80-100 order Fine magnesia 15-18,50-60 order quartz sand 45-50,60-80 order purple clay 6-8,40-50 order old sand 10-12, 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.
Described a kind of steel-casting to be breathed freely modified furan resin sand with the height containing purple clay, and 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, nanometer sepiolite 1-1.5, 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 is breathed freely with the height containing purple clay the preparation method of modified furan resin sand, described preparation method is: first Fine magnesia, quartz sand, purple clay, old sand 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 Fine magnesia of different-grain diameter, different ratio, quartz sand, purple clay and old sand as moulding sand material, after high temperature cast, porosity is high, good permeability, the interpolation of nano-tourmaline powder enhances type sand permeability further, and the modified furan resin bonding agent containing nanometer sepiolite of preparation has the advantages such as gas forming amount is low, organic substance residues is few, viscosity is low, bonding force is strong, excellent adsorption, intensity are large compared with traditional furane resins, utilization rate is higher, and consumption is few; The molding sand easy-formation prepared, to thermally-stabilised, is easy to defeated and dispersed cleaning, and the steel casting quality obtained effectively is improved, and yield rate is high.
Detailed description of the invention
A steel-casting modified furan resin sand of breathing freely containing the height of purple clay, this resin sand is prepared by the raw material of following weight portion: 80 order Fine magnesia 15,50 order quartz sand 45,60 order purple clay 6,40 order old sands 10, 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, nanometer sepiolite 1, 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 Fine magnesia, quartz sand, purple clay, old sand 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 0.04%, and viscosity is 25.2g/cm
3, the resin mass tensile strength after solidification can reach 1.21MPa.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. a steel-casting to be breathed freely modified furan resin sand with the height containing purple clay, it is characterized in that, this resin sand is prepared by the raw material of following weight portion: 80-100 order Fine magnesia 15-18,50-60 order quartz sand 45-50,60-80 order purple clay 6-8,40-50 order old sand 10-12, 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. a kind of steel-casting as claimed in claim 1 to be breathed freely modified furan resin sand with the height containing purple clay, 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, nanometer sepiolite 1-1.5, 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 is breathed freely with the height containing purple clay the preparation method of modified furan resin sand, it is characterized in that, described preparation method is: first Fine magnesia, quartz sand, purple clay, old sand 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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| CN201510497166.3A CN105081203A (en) | 2015-08-14 | 2015-08-14 | Purple-grit-mud-containing high-permeability modified furan resin sand for steel casting and preparation method of purple-grit-mud-containing high-permeability modified furan resin sand |
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| CN201510497166.3A CN105081203A (en) | 2015-08-14 | 2015-08-14 | Purple-grit-mud-containing high-permeability modified furan resin sand for steel casting and preparation method of purple-grit-mud-containing high-permeability modified furan resin sand |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001393A (en) * | 2016-06-22 | 2016-10-12 | 马鞍山市创诚铸造有限公司 | Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand |
| CN106563766A (en) * | 2016-11-03 | 2017-04-19 | 重庆长江造型材料（集团）股份有限公司 | Process for preparing low-ammonia environmentally-friendly resin precoated sand |
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| 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 CN201510497166.3A patent/CN105081203A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001393A (en) * | 2016-06-22 | 2016-10-12 | 马鞍山市创诚铸造有限公司 | Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand |
| CN106563766A (en) * | 2016-11-03 | 2017-04-19 | 重庆长江造型材料（集团）股份有限公司 | Process for preparing low-ammonia environmentally-friendly resin precoated sand |
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Application publication date: 20151125 |