CN101199984B - Release agent of sand mould and sand core and preparing process thereof - Google Patents
Release agent of sand mould and sand core and preparing process thereof Download PDFInfo
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- CN101199984B CN101199984B CN 200610134772 CN200610134772A CN101199984B CN 101199984 B CN101199984 B CN 101199984B CN 200610134772 CN200610134772 CN 200610134772 CN 200610134772 A CN200610134772 A CN 200610134772A CN 101199984 B CN101199984 B CN 101199984B
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- releasing agent
- stearate
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Abstract
Disclosed is a release agent used for sand mold and sand core, which is characterized in that the release agent is made from the compound of stearate, iron oxide red, organobentonite paste, binder and solvent oil. The quality percentage of the main chemical composition is: stearate:12 to 49, iron oxide red: 2 to 8, organobentonite paste: 10 to 40, binder: 0.3 to 2; and the rest is solvent oil. Using the release agent can greatly reduce the bonding power and the mold release resistance of mold and core on the die set. Thus the using period of the die set is increased.
Description
Technical field
The present invention relates to foundry engieering, a kind of sand mold, the core preparation method with releasing agent and this releasing agent is provided especially.
Background technology
At present, the artificial synthetic binder moulding of foundry industry extensive use, coremaking.Use therein binding agent comprises: acid cure phenolic resins, acid-curing furan resin, urethane self-hardening resin, ester solidify alkalescent phenol resin, ester solidifies casting water glass, carbon dioxide hardening basic resin, methyl formate sclerosis basic resin, amine sclerosis cold box resin.Above technology sand mold, core are all in mould internal shaping, sclerosis, when sand mold or core and mould separating since the bonding force between sand mold, core surface and mould and frictional force than ambassador's molding difficulty, easily cause sand mold, core breakage, the repairing amount of increase type, core, cause the dimensional discrepancy of foundry goods to increase, extensively adopt releasing agent for solving this technical problem foundry industry.Releasing agent is divided into powdered mold release agents and pulpous state releasing agent two big classes, and powdered mold release agents is difficult for smoothening when using, and flies upward everywhere, and waste material pollutes work situation, uses fewer and feweri at present.Most of enterprise selects the pulpous state releasing agent for use, with the method for brushing, spraying or soaking releasing agent is coated in die surface uniformly, treats to use after the coating drying.
At present, it is the primary lubricant material that the pulpous state releasing agent mainly adopts graphite, talcum powder, aluminium powder, aluminium paste, methyl-silicone oil, and wherein aluminium paste accounts for more than 90% of market share.Aluminium paste is raw material with the fine aluminium, melts in electric furnace, blows out particulate with high-pressure inert gas, and solubilizer is worn into aluminium paste in ball mill again, and complex manufacturing consumes a large amount of metallic aluminiums and electric power, the production cost height.Although making releasing agent with aluminium paste is that the releasing agent performance of primary raw material is good than graphite, talcum powder and methyl-silicone oil, once multipotency is with an order of classes or grades at school in brushing, and after the big position usefulness of gradient 3-4 time, greasy property obviously reduces.Type, wicking surface degradation, the middle local repair brush releasing agent that needs influences the normal operation of moulding line.Developing the releasing agent that a kind of cost is low, greasy property good, lubrication interval is long is the urgent need of Foundry Production.
Summary of the invention
The object of the present invention is to provide a kind of sand mold, core with releasing agent and preparation method thereof, with obviously reduction type of this releasing agent, core cohesive force and the ejection resistance to mould.Increase the mould life cycle.
The invention provides a kind of sand mold, core releasing agent, it is characterized in that this releasing agent makes after compound by hard acid ester salt, iron oxide red, organobentonite cream, binding agent, solvent naphtha, the main chemical mass percent is:
Hard acid ester salt: 12～49
Iron oxide red: 2～8
Organobentonite cream: 10～40
Binding agent: 0.3～2
Solvent naphtha: surplus
The hard acid ester salt that the present invention adds is: one or more of calcium stearate, magnesium stearate, zinc stearate, barium stearate, aluminum foil stearate, aluminium hydroxydistearate, in addition, the above-mentioned hard acid ester salt of the present invention preferably is selected from calcium stearate, zinc stearate.
Binding agent among the present invention is selected from various pure dissolubilities or oil-soluble binding agent.Wherein preferred: phenolic resins, esterase, rosin.
Solvent naphtha of the present invention is selected from a kind of or both mixtures of 120# solvent naphtha, 200# solvent naphtha, wherein preferred 200# solvent naphtha.
The invention provides the preparation method of above-mentioned releasing agent, it is characterized in that: will add in the high speed dispersor by the 200# solvent naphtha of quality proportioning weighing and organobentonite cream and stir, add hard acid ester salt again, iron oxide red stirs, add at last after binding agent confirms to stir evenly, will this slurry add and carry out dispersion treatment, discharging packing in sand mill.
Releasing agent provided by the invention can be used for acid cure phenolic resins self-hardening sand technology, acid-curing furan resin self-hardening sand technology, ester curing alkalescent phenol resin self-hardening sand technology, ester curing self-setting silicate process technology, urethane resin self-hardening sand technology, carbon dioxide hardening alkalescent phenol resin sand cold core box process, blows amine sclerosis urethane resin cold core box process, blows formic acid first vinegar ester sclerosis basic resin cold core box process.Suitable mold materials comprises: timber, cast iron, cast steel, cast aluminium, plastics.
This kind releasing agent low cost of manufacture, demolding performace is good, life cycle is long.
The specific embodiment
Embodiment 1
With 200# solvent naphtha 150kg, organobentonite cream 20kg (Shenyang founding materials institute system), add in the charging basket of FG250 type dispersion machine, under 600r/min, stir 5min adding calcium stearate 25kg, iron oxide red 4kg and under 800r/min, stir 5min, add 30% rosin ethanolic solution 0.7kg again and under 500r/min, stir 5min, stir well again will be mixed after even slurry add in the SK20-1 sand Mill, scattered barrelling afterwards.
Embodiment 2
To under 600r/min, stir 5min in 120# solvent naphtha 50kg, organobentonite cream 30kg (Shenyang founding materials institute system) the adding FG-250 type dispersion machine charging basket, add calcium stearate 24kg, zinc stearate 6kg, barium stearate 6kg, iron oxide red 6kg, under 800r/min, stir 5min, add phenolic resins 0.9kg again and under 500r/min, stir 5min, then this slurry is disperseed the back barrelling with the SK20-1 sand Mill.
Embodiment 3
To under the 600r/min rotating speed, stir 5min in 200# solvent naphtha 120kg organobentonite cream 20kg (Shenyang founding materials institute system) the adding dispersion machine, add in calcium stearate 6kg, zinc stearate 6kg, barium stearate 6kg, aluminum foil stearate 5kg, aluminium hydroxydistearate 5kg, the iron oxide red 4kg adding dispersion machine charging basket and under 800r/min, stir 5min, add esterase 0.5kg again and stir 5min at 500r/min, slurry is squeezed into the SK20-1 sand Mill further disperse, the discharging barrelling.
Embodiment 4
To under 600r/min, stir 5min in 200# solvent naphtha 27kg organobentonite cream 25kg (Shenyang founding materials institute system) the adding FG250 type dispersion machine, adding calcium stearate 29kg, zinc stearate 46kg, iron oxide red 4kg stir 5min under the 800r/min rotating speed, add esterase 2kg, 500r/min again and stir 5min, above-mentioned slurry is squeezed into further dispersion in the SK20-1 sand Mill, barrelling then.
Embodiment 5
Add with 120# solvent naphtha 50kg, with 200# solvent naphtha 80kg, organobentonite cream 22kg (Shenyang founding materials institute system) in the charging basket of FG-250 type dispersion machine and under 600r/min, stir 5min, add calcium stearate 28kg iron oxide red 4.2kg, under 800r/min, stir 5min, add esterase 0.8kg again and under 500r/min, stir 5min, then this slurry is disperseed the back barrelling with the SK20-1 sand Mill.
Embodiment 6
Embodiment 1 releasing agent brushing on aluminum bogie side frame core box surface, more than the air dry 8h, is made core with ester sodified water glass sand, produce 80 of cores, core continuously and do not have breakage, surface quality is good.
Embodiment 7～13
The releasing agent that adopts embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 technologies to make respectively, implementation procedure is listed table 1 in embodiment 6 performances and result.
Comparative Examples 14
Adopt commercially available casting demoulding aluminium paste releasing agent.Implementing process is listed table 1 in embodiment 5 identical operating positions and result.
Table 1
| Routine number | Adopt releasing agent | Use technology | Mold materials | Number of applications | Effect |
| Implement 6 | Embodiment 1 | Self-setting silicate process | Cast aluminium | 80 | Good |
| Implement 7 | Embodiment 1 | Furan resin self curing sand | Timber | 30 | Good |
| Implement 8 | Embodiment 2 | The phenolic resins self-hardening sand | Cast iron | 45 | Good |
| Implement 9 | Embodiment 2 | The urethane resin self-hardening sand | Cast aluminium | 50 | Good |
| Implement 10 | Embodiment 3 | The alkalescent phenol resin self-hardening sand | Cast aluminium | 40 | Good |
| Implement 11 | Embodiment 3 | The carbon dioxide cold-box | Plastics | 50 | Good |
| Implement 12 | Embodiment 4 | The methyl formate cold-box | Plastics | 60 | Good |
| Implement 13 | Embodiment 5 | The amine cold-box | Cast steel | 30 | Good |
| Comparative Examples 14 | The aluminium paste releasing agent | Self-setting silicate process | Cast aluminium | 20 | Generally |
Claims (6)
1. a sand mold, core releasing agent is characterized in that the mass percent of each component of releasing agent is:
Hard acid ester salt: 12～45
Iron oxide red: 2～8
Organobentonite cream: 10～40
Binding agent: 0.3～2
Solvent naphtha: surplus
Wherein hard acid ester salt is selected from one or more of calcium stearate, magnesium stearate, zinc stearate, barium stearate, aluminum foil stearate, aluminium hydroxydistearate; Binding agent is selected from various pure dissolubilities or oil-soluble binding agent,
Wherein solvent naphtha is selected from a kind of or the two mixture of 120# solvent naphtha, 200# solvent naphtha.
2. according to the described sand mold of claim 1, core releasing agent, it is characterized in that: hard acid ester salt is selected from calcium stearate, zinc stearate.
3. according to the described sand mold of claim 1, core releasing agent, it is characterized in that: binding agent is selected from one or more of phenolic resins, esterase, rosin.
4. the described sand mold of claim 1, core are with the preparation method of releasing agent, it is characterized in that: will add in the high speed dispersor by the solvent naphtha of quality proportioning weighing and organobentonite cream and stir, add hard acid ester salt again, iron oxide red stirs, add at last after binding agent confirms to stir evenly, will this slurry add and carry out dispersion treatment, discharging packing in sand mill.
5. the described sand mold of claim 1, core are applicable to phenolic acid resin self-setting sand technology, furan resin self curing sand technology, alkaline phenolic acid resin self-setting sand technology, urethane resin self-hardening sand technology, self-setting silicate process technology, blow the carbon dioxide cold core box process, blow the methyl formate cold core box process, blow aminuria alkane resin cold core box process with releasing agent.
6. the described sand mold of claim 1, core are applicable to sand casting usefulness with releasing agent, wooden model tool, cast-aluminum die, cast steel mould, cast iron mould, mould of plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134772 CN101199984B (en) | 2006-12-14 | 2006-12-14 | Release agent of sand mould and sand core and preparing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134772 CN101199984B (en) | 2006-12-14 | 2006-12-14 | Release agent of sand mould and sand core and preparing process thereof |
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| CN101199984A CN101199984A (en) | 2008-06-18 |
| CN101199984B true CN101199984B (en) | 2013-08-28 |
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| CN 200610134772 Expired - Fee Related CN101199984B (en) | 2006-12-14 | 2006-12-14 | Release agent of sand mould and sand core and preparing process thereof |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029354B (en) * | 2010-12-31 | 2012-06-06 | 山东省源通机械股份有限公司 | Moulding sand additive for green sand casting of metal castings |
| CN102219667B (en) * | 2011-04-22 | 2013-12-11 | 中山市华明泰化工材料科技有限公司 | Higher fatty acid metal salt and preparation method thereof |
| CN102974752B (en) * | 2012-10-31 | 2014-07-16 | 高金菊 | Mold release agent for pig-casting machine |
| CN104117627B (en) * | 2014-07-03 | 2016-08-24 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of resin-bonded sand cast form quick-drying releasing agent and preparation technology thereof |
| CN106077443A (en) * | 2016-07-04 | 2016-11-09 | 宁夏铸源机械修配有限公司 | Continuous casting machine releasing agent |
| CN106955968B (en) * | 2017-04-27 | 2018-11-06 | 江苏康姆罗拉特种陶瓷有限公司 | A kind of preparation method of resistance to storage releasing agent |
| CN109420737B (en) * | 2017-08-31 | 2020-11-10 | 沈阳汇亚通铸造材料有限责任公司 | Water-based release agent and preparation method thereof |
| CN107737869A (en) * | 2017-11-27 | 2018-02-27 | 共享装备股份有限公司 | Improve the coating colloid of apperance release property and the preparation method of coat |
| CN109465391B (en) * | 2018-12-20 | 2020-10-27 | 青岛连山铸造有限公司 | Preparation method of molding sand for casting 350km axle box |
| CN110523916A (en) * | 2019-09-30 | 2019-12-03 | 安徽信息工程学院 | A kind of environmentally friendly release agent and its preparation and application for sand casting mould |
| CN116355681A (en) * | 2023-03-24 | 2023-06-30 | 白鸽磨料磨具有限公司 | Special release agent for grinding disc of common grinding ceramic resin composite bonding agent and preparation method of special release agent |
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2006
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