CN112775391A - Low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand and preparation method thereof - Google Patents
Low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand and preparation method thereof Download PDFInfo
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- CN112775391A CN112775391A CN202011546809.6A CN202011546809A CN112775391A CN 112775391 A CN112775391 A CN 112775391A CN 202011546809 A CN202011546809 A CN 202011546809A CN 112775391 A CN112775391 A CN 112775391A
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- sand
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- low
- furan resin
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Classifications
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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
-
- 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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- 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
- B22C1/20—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 organic agents
- B22C1/22—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 organic agents of resins or rosins
- B22C1/2233—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 organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/2246—Condensation polymers of aldehydes and ketones
- B22C1/2253—Condensation polymers of aldehydes and ketones with phenols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
Abstract
The invention is a low-gas-generating high-strength quick-drying repair paste for furan resin sand and a preparation method thereof, and the preparation process is simple and the operation is convenient; the solvent is an alcohol-based system, so that when the solvent is used in a foundry, the solvent can be directly ignited for drying after repair, and can also be quickly dried, and the production efficiency is greatly improved; the modified phenolic resin, the silica sol and the ball clay are used as the binder, so that the strength is high, the falling-off is avoided, the gas evolution is low, and the generation of pores is effectively reduced; bauxite and mullite sand are used as refractory aggregate, so that the refractory degree is high, and sand sticking is not easy to generate; the asbestos wool and the cellulose are added, so that cracks can be prevented from being generated after the repairing paste is dried, molten iron can be prevented from permeating, and defects such as veins, sand sticking and the like can be prevented.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a low-gas-emission high-strength quick-drying type repairing paste for furan resin sand and a preparation method thereof.
Background
The molding method of the furan resin sand is characterized in that the furan resin is used as a binder, an acid catalyst is added to mix and prepare molding sand, and the molding sand is self-cured at normal temperature, and has the advantages that: (1) the molding sand has good fluidity, is easy to compact (2), is stripped after solidification, reduces the deformation of the sand mold (3), does not need baking, has small modification amount and is simple and convenient (4), has high casting mold strength, reduces the damage and deformation in the core setting and mold matching processes (5), has good collapsibility of the molding sand (6), has high production efficiency, particularly reduces the labor intensity of large-piece production (7), and mostly adopts a continuous sand mixer
In the production process of furan resin sand, the sand core which causes poor mold core forming and needs to be repaired accounts for about 5 to 10 percent due to various reasons. The special furan resin sand core repair paste is needed for repairing, the traditional furan resin core repair paste is formed by mixing quartz sand, quartz powder, bentonite, starch and water, and the bentonite and the starch are used as adhesives, so that the following problems exist: firstly, the repaired sand core can be dried or naturally dried, the drying consumes energy, the drying is natural, the drying time is long, the drying can be carried out in at least more than 1 day, and the casting defects such as air holes and the like easily appear on the poured product due to overlong sand core placement time and moisture absorption of the sand core; secondly, after the repaired part is dried, the adhesive is not firmly bonded and is easy to fall off. Thirdly, the traditional mending paste uses starch as a binder, the adding amount and the gas evolution are large, water is used as a solvent, water is not easy to completely dry, and when a product is poured, the mending paste has large gas evolution, so that the product is easy to generate tissue defects, the product quality is influenced, and the technical requirements of production cannot be met. Fifthly, the shelf life is short, and the product is easy to deteriorate and lose efficacy.
Disclosure of Invention
The invention aims to develop a low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: the low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand is characterized by comprising the following components in parts by weight:
40-60 parts of bauxite powder;
10-20 parts of mullite sand;
1-5 parts of rosin modified phenolic resin;
1-6 parts of ball clay;
1-6 parts of magnesium aluminum silicate;
0.2-1.2 parts of carboxymethyl cellulose;
2-4 parts of asbestos wool;
1-3 parts of silica sol;
10-30 parts of methanol.
In particular, the alunite powder is 325 mesh alunite powder.
In particular, the mullite sand is 120 mesh mullite sand.
In particular, the weight portions of the bauxite powder, the mullite sand, the rosin modified phenolic resin, the ball clay, the magnesium aluminum silicate, the carboxymethyl cellulose, the asbestos wool, the silica sol and the methanol are respectively 50 portions, 15 portions, 2 portions, 5 portions, 1 portion, 3 portions, 2 portions and 20 portions.
The invention also provides a preparation method of the low-gas-generation high-strength quick-drying repair paste for furan resin sand, which comprises the following steps of:
a, preparing a cellulose suspension by dispersing carboxymethyl cellulose, asbestos wool and methanol at a high speed;
b, dispersing magnesium aluminum silicate, ball clay and methanol at high speed to prepare a suspension solution;
c, dispersing the rosin modified phenolic resin and methanol at high speed to prepare a resin solution;
d, adding alumine powder and mullite sand into the kneader, and uniformly stirring;
e, adding the cellulose suspension prepared in the step a, the suspension solution prepared in the step b, the resin solution prepared in the step c and the silica sol into a kneader, and stirring until the mixture is uniformly stirred;
f, obtaining the casting sand core repairing paste.
In particular, the stirring time in step e is at least 30 minutes.
The invention has the beneficial effects that: the preparation process is simple and convenient to operate; the solvent is an alcohol-based system, so that when the solvent is used in a foundry, the solvent can be directly ignited for drying after repair, and can also be quickly dried, and the production efficiency is greatly improved; the modified phenolic resin, the silica sol and the ball clay are used as the binder, so that the strength is high, the falling-off is avoided, the gas evolution is low, and the generation of pores is effectively reduced; bauxite and mullite sand are used as refractory aggregate, so that the refractory degree is high, and sand sticking is not easy to generate; the asbestos wool and the cellulose are added, so that cracks can be prevented from being generated after the repairing paste is dried, molten iron can be prevented from permeating, and defects such as veins, sand sticking and the like can be prevented.
Detailed Description
The invention is further illustrated by the following examples:
the low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand is characterized by comprising the following components in parts by weight:
in particular, the alunite powder is 325 mesh alunite powder.
In particular, the mullite sand is 120 mesh mullite sand.
In particular, the weight portions of the bauxite powder, the mullite sand, the rosin modified phenolic resin, the ball clay, the magnesium aluminum silicate, the carboxymethyl cellulose, the asbestos wool, the silica sol and the methanol are respectively 50 portions, 15 portions, 2 portions, 5 portions, 1 portion, 3 portions, 2 portions and 20 portions.
The invention also provides a preparation method of the low-gas-generation high-strength quick-drying repair paste for furan resin sand, which comprises the following steps of:
a, preparing a cellulose suspension by dispersing carboxymethyl cellulose, asbestos wool and methanol at a high speed;
b, dispersing magnesium aluminum silicate, ball clay and methanol at high speed to prepare a suspension solution;
c, dispersing the rosin modified phenolic resin and methanol at high speed to prepare a resin solution;
d, adding alumine powder and mullite sand into the kneader, and uniformly stirring;
e, adding the cellulose suspension prepared in the step a, the suspension solution prepared in the step b, the resin solution prepared in the step c and the silica sol into a kneader, and stirring until the mixture is uniformly stirred;
f, obtaining the casting sand core repairing paste.
In particular, the stirring time in step e is at least 30 minutes.
Example 1
The low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand is characterized by comprising the following components in parts by weight:
50 parts of bauxite powder;
15 parts of mullite sand;
2 parts of rosin modified phenolic resin;
5 parts of ball clay;
5 parts of magnesium aluminum silicate;
1 part of carboxymethyl cellulose;
3 parts of asbestos wool;
2 parts of silica sol;
20 parts of methanol.
In particular, the alunite powder is 325 mesh alunite powder.
In particular, the mullite sand is 120 mesh mullite sand.
The invention also provides a preparation method of the low-gas-generation high-strength quick-drying repair paste for furan resin sand, which comprises the following steps of:
a, preparing a cellulose suspension by dispersing carboxymethyl cellulose, asbestos wool and methanol at a high speed;
b, dispersing magnesium aluminum silicate, ball clay and methanol at high speed to prepare a suspension solution;
c, dispersing the rosin modified phenolic resin and methanol at high speed to prepare a resin solution;
d, adding alumine powder and mullite sand into the kneader, and uniformly stirring;
e, adding the cellulose suspension prepared in the step a, the suspension solution prepared in the step b, the resin solution prepared in the step c and the silica sol into a kneader, and stirring until the mixture is uniformly stirred;
f, obtaining the casting sand core repairing paste.
In particular, the stirring time in step e is at least 30 minutes.
Example 2
The low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand is characterized by comprising the following components in parts by weight:
in particular, the alunite powder is 325 mesh alunite powder.
In particular, the mullite sand is 120 mesh mullite sand.
The invention also provides a preparation method of the low-gas-generation high-strength quick-drying repair paste for furan resin sand, which comprises the following steps of:
a, preparing a cellulose suspension by dispersing carboxymethyl cellulose, asbestos wool and methanol at a high speed;
b, dispersing magnesium aluminum silicate, ball clay and methanol at high speed to prepare a suspension solution;
c, dispersing the rosin modified phenolic resin and methanol at high speed to prepare a resin solution;
d, adding alumine powder and mullite sand into the kneader, and uniformly stirring;
e, adding the cellulose suspension prepared in the step a, the suspension solution prepared in the step b, the resin solution prepared in the step c and the silica sol into a kneader, and stirring until the mixture is uniformly stirred;
f, obtaining the casting sand core repairing paste.
In particular, the stirring time in step e is at least 30 minutes.
Example 3
The low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand is characterized by comprising the following components in parts by weight:
in particular, the alunite powder is 325 mesh alunite powder.
In particular, the mullite sand is 120 mesh mullite sand.
The invention also provides a preparation method of the low-gas-generation high-strength quick-drying repair paste for furan resin sand, which comprises the following steps of:
a, preparing a cellulose suspension by dispersing carboxymethyl cellulose, asbestos wool and methanol at a high speed;
b, dispersing magnesium aluminum silicate, ball clay and methanol at high speed to prepare a suspension solution;
c, dispersing the rosin modified phenolic resin and methanol at high speed to prepare a resin solution;
d, adding alumine powder and mullite sand into the kneader, and uniformly stirring;
e, adding the cellulose suspension prepared in the step a, the suspension solution prepared in the step b, the resin solution prepared in the step c and the silica sol into a kneader, and stirring until the mixture is uniformly stirred;
f, obtaining the casting sand core repairing paste.
In particular, the stirring time in step e is at least 30 minutes.
The invention has been described above by way of example; it is to be understood that the invention is not limited to the specific embodiments described above; various improvements are only needed to be made by adopting the method conception and the technical scheme of the invention; or directly applied to other occasions without improvement; are within the scope of the invention.
Claims (6)
1. The low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand is characterized by comprising the following components in parts by weight:
2. the low-gas-emission high-strength quick-drying repair paste for furan resin sand according to claim 1, wherein the alunite powder is 325 mesh alunite powder.
3. The low-gas-emission high-strength quick-drying repair paste for furan resin sand according to claim 1, wherein the mullite sand is 120-mesh mullite sand.
4. The low-gas-emission high-strength quick-drying repair paste for furan resin sand according to claim 1, wherein the weight parts of alunite powder, mullite sand, rosin-modified phenolic resin, ball clay, magnesium aluminum silicate, carboxymethyl cellulose, asbestos wool, silica sol and methanol are 50 parts, 15 parts, 2 parts, 5 parts, 1 part, 3 parts, 2 parts and 20 parts, respectively.
5. A preparation method of the low-gas-emission high-strength quick-drying repair paste for furan resin sand as defined in any one of claims 1 to 4, which is characterized by comprising the following steps:
a, preparing a cellulose suspension by dispersing carboxymethyl cellulose, asbestos wool and methanol at a high speed;
b, dispersing magnesium aluminum silicate, ball clay and methanol at high speed to prepare a suspension solution;
c, dispersing the rosin modified phenolic resin and methanol at high speed to prepare a resin solution;
d, adding alumine powder and mullite sand into the kneader, and uniformly stirring;
e, adding the cellulose suspension prepared in the step a, the suspension solution prepared in the step b, the resin solution prepared in the step c and the silica sol into a kneader, and stirring until the mixture is uniformly stirred;
f, obtaining the casting sand core repairing paste.
6. The method for preparing the low-gas-emission high-strength quick-drying repair paste for furan resin sand according to claim 5, wherein the stirring time in the step e is at least 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546809.6A CN112775391A (en) | 2020-12-24 | 2020-12-24 | Low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546809.6A CN112775391A (en) | 2020-12-24 | 2020-12-24 | Low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand and preparation method thereof |
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| CN112775391A true CN112775391A (en) | 2021-05-11 |
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| CN202011546809.6A Withdrawn CN112775391A (en) | 2020-12-24 | 2020-12-24 | Low-gas-evolution high-strength quick-drying type repairing paste for furan resin sand and preparation method thereof |
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Citations (8)
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|---|---|---|---|---|
| CN1666828A (en) * | 2005-01-18 | 2005-09-14 | 湖北工业大学 | Anti-seepage burnon casting paint made from alcohol base or aqueous sand powder |
| CN1785883A (en) * | 2005-12-09 | 2006-06-14 | 长安汽车（集团）有限责任公司 | Film covered sand core fast drying repair paste |
| JP2006239774A (en) * | 2005-02-02 | 2006-09-14 | Kao Corp | Spherical molding sand |
| JP2013067787A (en) * | 2011-09-09 | 2013-04-18 | Nisshin Chem Ind Co Ltd | Coating composition and laminate |
| CN103990764A (en) * | 2014-05-20 | 2014-08-20 | 朝阳佳诚耐火材料有限公司 | Casting sand core repairing paste and preparation method thereof |
| CN108484049A (en) * | 2018-04-28 | 2018-09-04 | 浙江万川装饰设计工程有限公司 | Decoration mortar and its construction method |
| CN109014062A (en) * | 2018-09-29 | 2018-12-18 | 西峡县众德汽车部件有限公司 | Sand core mending paste and preparation method thereof and sand core |
| CN109332579A (en) * | 2018-11-28 | 2019-02-15 | 南京宁阪特殊合金有限公司 | It is a kind of to uphang buoyancy coating and preparation method thereof for resin bonded sand mould casting |
-
2020
- 2020-12-24 CN CN202011546809.6A patent/CN112775391A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666828A (en) * | 2005-01-18 | 2005-09-14 | 湖北工业大学 | Anti-seepage burnon casting paint made from alcohol base or aqueous sand powder |
| JP2006239774A (en) * | 2005-02-02 | 2006-09-14 | Kao Corp | Spherical molding sand |
| CN1785883A (en) * | 2005-12-09 | 2006-06-14 | 长安汽车（集团）有限责任公司 | Film covered sand core fast drying repair paste |
| JP2013067787A (en) * | 2011-09-09 | 2013-04-18 | Nisshin Chem Ind Co Ltd | Coating composition and laminate |
| CN103990764A (en) * | 2014-05-20 | 2014-08-20 | 朝阳佳诚耐火材料有限公司 | Casting sand core repairing paste and preparation method thereof |
| CN108484049A (en) * | 2018-04-28 | 2018-09-04 | 浙江万川装饰设计工程有限公司 | Decoration mortar and its construction method |
| CN109014062A (en) * | 2018-09-29 | 2018-12-18 | 西峡县众德汽车部件有限公司 | Sand core mending paste and preparation method thereof and sand core |
| CN109332579A (en) * | 2018-11-28 | 2019-02-15 | 南京宁阪特殊合金有限公司 | It is a kind of to uphang buoyancy coating and preparation method thereof for resin bonded sand mould casting |
Non-Patent Citations (3)
| Title |
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Application publication date: 20210511 |
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