CN110732631B - Binder for casting material and preparation process thereof - Google Patents
Binder for casting material and preparation process thereof Download PDFInfo
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- CN110732631B CN110732631B CN201911187249.7A CN201911187249A CN110732631B CN 110732631 B CN110732631 B CN 110732631B CN 201911187249 A CN201911187249 A CN 201911187249A CN 110732631 B CN110732631 B CN 110732631B
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- binder
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- barium stearate
- water glass
- coupling agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a binder for casting materials and a preparation process thereof, belonging to the technical field of binder preparation, wherein the binder is prepared from the following raw materials in parts by weight: 3-5 parts of water glass, 4-7 parts of argil and 0.1-0.2 part of sodium lignosulfonate0.1 to 0.3 portion of silane coupling agent and Sb2O30.1-0.2 part of barium stearate and 0.05-0.1 part of barium stearate. The preparation process comprises the following steps: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, and after mixing uniformly, connecting the barium stearate with a metering pump through a discharge hole of the reaction kettle for filling. The prepared binder can be suitable for materials with high requirements on the temperature of the molding sand, and has the advantages of low cost, strong practicability, high binding strength, high temperature resistance and the like. The preparation process is changed into filling by a gear metering pump, so that the problems that the production and packaging cannot be continuously carried out and the like because the production process must be static for a long time and the reaction cannot be fully carried out and the packaging cannot be carried out at any time are solved, and the quality and the yield of products are improved.
Description
Technical Field
The invention relates to the technical field of preparation of binders, and particularly relates to a binder for a casting material and a preparation process thereof.
Background
The foundry industry is an important component of the manufacturing industry in China, causes serious energy and environmental problems while developing rapidly, and is in a key period from high consumption and high pollution to energy conservation, emission reduction and green manufacturing transformation along with the issuance of relevant laws and regulations and the proposal of ecological civilization construction. In casting production, the adhesive occupies a very important position, and the main function of the adhesive is to form a continuous adhesive film with certain strength on granular or powdery molding materials. In the field of casting at present, binders are mainly classified into two categories: inorganic binders and organic binders. The organic binder has the defects of large pungent smell, large amount of toxic gas generated in the casting process, serious environmental pollution, higher price of organic resin and the like, so that the use of the organic binder is greatly limited. The inorganic binder mainly comprising water glass has the advantages of no generation of irritant toxic gas, no black pollution and low cost. However, inorganic binders also have problems of low binding strength, poor moisture absorption resistance, and poor high temperature resistance. In addition, in the existing production process, the production of the adhesive is discontinuous, and the continuous feeding can influence the pressure change in the reaction kettle, so that the quality and the yield of the adhesive are reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides the binder for the casting material and the preparation process thereof, and the prepared binder can be suitable for materials with high requirements on the temperature of the molding sand, has the advantages of low cost, strong practicability, high binding strength, high temperature resistance and the like, and can be widely applied to the casting field. The preparation process is changed into filling by a gear metering pump, so that the problems that the production and packaging cannot be continuously carried out and the like because the production process must be static for a long time and the reaction cannot be fully carried out and the packaging cannot be carried out at any time are solved, and the quality and the yield of products are improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the binder for the casting material is prepared from the following raw materials in parts by weight: 3-5 parts of water glass, 4-7 parts of argil, 0.1-0.2 part of sodium lignosulfonate, 0.1-0.3 part of silane coupling agent and Sb2O30.1-0.2 part of barium stearate and 0.05-0.1 part of barium stearate.
Preferably, the binder for the casting material is prepared from the following raw materials in parts by weight: 4 parts of water glass, 5.5 parts of argil, 0.15 part of sodium lignosulfonate, 0.2 part of silane coupling agent and Sb2O30.15 part and 0.07 part of barium stearate.
Preferably, the argil is one or more of kaolin and bentonite.
Preferably, the silane coupling agent is any one or more of isobutyl triethoxysilane, vinyltrimethoxysilane and vinyltris (beta-methoxyethoxy) silane.
The invention also provides a preparation process of the binder for the casting material, which comprises the following steps: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, and after mixing uniformly, connecting the barium stearate with a metering pump through a discharge hole of the reaction kettle for filling.
Preferably, the stirring time is 30-60 min.
Preferably, the metering pump is a gear metering pump.
The beneficial effects of the invention are as follows:
the invention is an inorganic binder taking water glass as a main component, sodium lignosulfonate is an anionic surfactant, the viscosity of the inorganic binder of the water glass can be adjusted, and the surface is reducedThe silane coupling agent can improve the interface action of the water glass and the casting, thereby improving the bonding strength, also improving the water resistance of the water glass binder, generating chemical coupling action with the casting surface while serving as a curing agent, being not easy to fall off, and improving the moisture absorption resistance by the argil; sb in the binder2O3The high temperature resistance of the binder can be improved, the barium stearate serving as a heat stabilizer can further improve the thermal stability of the binder, and the prepared binder has high temperature resistance, can be suitable for materials with high requirements on the temperature of the molding sand, and can further widen the application range; the adhesive has the advantages of low cost, strong practicability, high adhesive strength, high temperature resistance and the like, and can be widely applied to the field of casting; the preparation process is changed into filling by using a gear metering pump, which is equivalent to secondary grinding and stirring of the binder, so that the reaction effect is increased, the product performance is improved, after the primary feeding reaction is thorough, the metering pump can be packaged at any time, the continuous feeding can be realized in the packaging process, the quality of the binder cannot be influenced due to the pressure change in the reaction kettle, the problem that the production and packaging cannot be continuously streamlined because the reaction must be stopped for a long time in the production process and the packaging cannot be realized at any time is solved, and the product quality and the yield are greatly improved.
Detailed Description
To facilitate understanding of those skilled in the art, the present invention will be further described with reference to specific examples:
example 1:
the binder for the casting material is prepared from the following raw materials in parts by weight: 3 parts of water glass, 4 parts of kaolin, 0.1 part of sodium lignosulfonate, 0.1 part of isobutyl triethoxysilane and Sb2O30.1 part and 0.05 part of barium stearate.
The preparation process of the binder for the casting material comprises the following steps: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, after being mixed evenly, the mixture is prepared byAnd a discharging port of the reaction kettle is connected with a gear metering pump for filling. The stirring time is 30-60 min.
Example 2
The binder for the casting material is prepared from the following raw materials in parts by weight: 4 parts of water glass, 5.5 parts of kaolin, 0.15 part of sodium lignosulfonate, 0.2 part of vinyl trimethoxy silane and Sb2O30.15 part and 0.07 part of barium stearate.
The preparation process of the binder for the casting material comprises the following steps: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, and after mixing uniformly, connecting the barium stearate with a gear metering pump through a discharging hole of the reaction kettle for filling. The stirring time is 30-60 min.
Example 3
The binder for the casting material is prepared from the following raw materials in parts by weight: 5 parts of water glass, 7 parts of bentonite, 0.2 part of sodium lignosulfonate, 0.3 part of vinyl tri (beta-methoxyethoxy) silane and Sb2O30.2 part and 0.1 part of barium stearate.
The preparation process of the binder for the casting material comprises the following steps: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, and after mixing uniformly, connecting the barium stearate with a gear metering pump through a discharging hole of the reaction kettle for filling. The stirring time is 30-60 min.
Example 4
The binder for the casting material is prepared from the following raw materials in parts by weight: 4 parts of water glass, 7 parts of kaolin, 0.1 part of sodium lignosulfonate, 0.3 part of vinyl trimethoxy silane and Sb2O30.15 part and 0.08 part of barium stearate.
The preparation process of the binder for the casting material comprises the following steps: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, and after mixing uniformly, connecting the barium stearate with a gear metering pump through a discharging hole of the reaction kettle for filling. The stirring time is 30-60 min.
And (3) performance testing:
the binder prepared in each example was added to standard sand in an amount of 3% of the specific gravity of the standard sand, and then a test piece of Φ 20 × 20mm was prepared according to a conventional method, and various properties thereof were tested, and the results were as follows:
| item | Normal temperature compressive strength (Mpa) | High temperature compressive strength (Mpa) | Heat resistance temperature (. degree. C.) |
| Example 1 | 3.21 | 0.72 | 186 |
| Example 2 | 3.32 | 0.79 | 192 |
| Example 3 | 3.28 | 0.75 | 188 |
| Example 4 | 3.40 | 0.86 | 196 |
The sample block made of the prepared binder has the normal-temperature compressive strength of 3.21-3.40Mpa, the high-temperature compressive strength of more than 0.72Mpa, the heat-resistant temperature of 186-196 ℃, and good temperature resistance and bonding strength.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (4)
1. The binder for the casting material is characterized by being prepared from the following raw materials in parts by weight: 3-5 parts of water glass, 4-7 parts of argil, 0.1-0.2 part of sodium lignosulfonate, 0.1-0.3 part of silane coupling agent and Sb2O30.1-0.2 part of barium stearate and 0.05-0.1 part of barium stearate, wherein the silane coupling agent is any one or more of isobutyl triethoxysilane, vinyl trimethoxy silane and vinyl tri (beta-methoxyethoxy) silane.
2. The binder for the casting material as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 4 parts of water glass, 5.5 parts of argil, 0.15 part of sodium lignosulfonate, 0.2 part of silane coupling agent and Sb2O30.15 part and 0.07 part of barium stearate.
3. The binder for casting materials as claimed in claim 1, wherein the clay is one or more selected from kaolin and bentonite.
4. The method of any one of claims 1 to 3The preparation process of the binder for the casting material is characterized by comprising the following steps of: pumping the water glass and the argil into a reaction kettle by utilizing vacuum, fully and uniformly stirring, and adding sodium lignosulfonate, a silane coupling agent and Sb2O3And barium stearate, and after mixing uniformly, connecting a metering pump through a discharge hole of the reaction kettle for filling, wherein the stirring time is 30-60min, and the metering pump is a gear metering pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911187249.7A CN110732631B (en) | 2019-11-28 | 2019-11-28 | Binder for casting material and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911187249.7A CN110732631B (en) | 2019-11-28 | 2019-11-28 | Binder for casting material and preparation process thereof |
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| Publication Number | Publication Date |
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| CN110732631A CN110732631A (en) | 2020-01-31 |
| CN110732631B true CN110732631B (en) | 2021-04-30 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444823B (en) * | 2008-12-26 | 2013-08-21 | 济南圣泉集团股份有限公司 | Caking agent |
| CN107021763A (en) * | 2016-12-30 | 2017-08-08 | 宁夏共享能源有限公司 | Casting moulding system component prepared with reclaimed sand and preparation method thereof |
| CN107617716A (en) * | 2017-10-12 | 2018-01-23 | 东风精密铸造安徽有限公司 | A kind of casting technique binding agent and preparation method thereof |
| CN107866518B (en) * | 2017-10-31 | 2020-02-14 | 安徽大天铸业有限责任公司 | Environment-friendly high-temperature-resistant precoated sand and preparation method thereof |
| CN108704329A (en) * | 2018-06-11 | 2018-10-26 | 周兴明 | A kind of metal caesium or the canned system and device of rubidium molecular distillation and technological process |
| CN109465380B (en) * | 2019-01-04 | 2021-08-10 | 山东永创材料科技有限公司 | High-strength binder for cast iron |
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Denomination of invention: The invention relates to a binder for casting materials and a preparation process thereof Effective date of registration: 20211227 Granted publication date: 20210430 Pledgee: Linshang Bank Co.,Ltd. Weifang branch Pledgor: SHANDONG YONGCHUANG MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2021980016496 |
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Date of cancellation: 20230111 Granted publication date: 20210430 Pledgee: Linshang Bank Co.,Ltd. Weifang branch Pledgor: SHANDONG YONGCHUANG MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2021980016496 |
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