CN108339929B - A kind of forming and fixing agent and its preparation process and application - Google Patents
A kind of forming and fixing agent and its preparation process and application Download PDFInfo
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- CN108339929B CN108339929B CN201711027233.0A CN201711027233A CN108339929B CN 108339929 B CN108339929 B CN 108339929B CN 201711027233 A CN201711027233 A CN 201711027233A CN 108339929 B CN108339929 B CN 108339929B
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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
- B22C1/167—Mixtures of inorganic and organic binding agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a kind of forming and fixing agent, raw material includes: 10-20 parts of phenolic resin, 8-18 parts of polyvinyl butyral, 4-12 parts of polyvinyl alcohol, 5-10 parts of water-soluble silicon oil, 3-8 parts of triethanolamine, 10-20 parts of polyacrylamide, 2-8 parts of coco amine, 5-15 parts of paraffin oil, 4-12 parts of carboxymethyl cellulose, 4-10 parts of acroleic acid resin powder, 3-9 parts of titanium dioxide, 6-12 parts of molybdenum disulfide and 20-30 parts of deionized water by weight.The invention also discloses application of the forming and fixing agent of preparation in the molding of 3D printing precoated sand.Forming and fixing agent prepared by the present invention can be improved the adhesive strength of precoated sand, improve the weatherabilities such as heat resistance, the resistance to ag(e)ing of precoated sand, extend the service life of precoated sand.
Description
Technical field
The invention belongs to forming and fixing agent technical field, a kind of forming and fixing agent and its preparation process are related particularly to,
And application of the forming and fixing agent in the molding of 3D printing precoated sand.
Background technique
Curing agent also known as curing agent, curing agent or set agent are a kind of substance promoted or control curing reaction or mixing
Object.Solidification is to solidify and (be crosslinked) agent by addition to complete.
The kind of curing agent all has a significant impact to the mechanical property of solidfied material, heat resistance, water resistance, corrosion resistance etc.,
In general, using the available heat-resisting excellent solidfied material of the high curing agent of solidification temperature.In order to improve the weather-proof of solidfied material
Property, a kind of curing agent being adapted therewith is needed accordingly.
Curing agent be widely used in concrete preparation process, soil stabilization, in highway engineering construction, precoated sand preparation
Etc..
Precoated sand, sand grain surface are covered with the molding sand or core sand of one layer of hard resin film before moulding.Precoated sand is mainly used
In preparing steel-casting, ironcasting etc..The first mold of conventional cast industry exploitation new product needs, again coremaking, are finally poured group core
Casting, time-consuming, at high cost, low efficiency；3D printing technique is applied in casting, the processes such as mold, coremaking, pole are saved
Big shortens new product development cycle, improves efficiency.But the precoated sand due to using in conventional casting techniques is in intensity, steady
The deficiency of the aspect of performance such as qualitative, high temperature resistant substitutes traditional precoated sand use in 3D printing technique using 3D printing precoated sand
As inexorable trend.
3D printing precoated sand needs to carry out it during the preparation process forming and hardening, and it is used at present it is relatively conventional at
Type curing agent is methenamine, although can achieve the effect that forming and hardening using methenamine, it can not improve overlay film
The weatherability of sand.Moreover methenamine has inflammability and corrosivity, and danger coefficient is higher in use, needs energy
The forming and fixing agent for enough improving precoated sand weatherability and safety replaces.
Summary of the invention
The object of the present invention is to provide a kind of forming and fixing agents that can be improved 3D printing precoated sand weatherability.
To achieve the above object, the technical scheme is that
A kind of forming and fixing agent, raw material include: 10-20 parts of phenolic resin, polyvinyl butyral 8-18 by weight
Part, 4-12 parts of polyvinyl alcohol, 5-10 parts of water-soluble silicon oil, 3-8 parts of triethanolamine, 10-20 parts of polyacrylamide, coco amine 2-8
Part, 5-15 parts of paraffin oil, 4-12 parts of carboxymethyl cellulose, 4-10 parts of acroleic acid resin powder, 3-9 parts of titanium dioxide, molybdenum disulfide
6-12 parts and 20-30 parts of deionized water.
A kind of preparation process of above-mentioned forming and fixing agent, includes the following steps:
A, phenolic resin, polyvinyl butyral, polyvinyl alcohol, water-soluble silicon oil, paraffin oil are mixed, are mixed
Mixture A is obtained after conjunction；
B, triethanolamine, polyacrylamide, coco amine, carboxymethyl cellulose, molybdenum disulfide are mixed, are mixed
Mixture B is obtained afterwards；
C, said mixture B is taken to be added in said mixture A, add acrylic resin powder, titanium dioxide and go from
Sub- water, heating water bath after mixing, and be stirred continuously, slowly cool to room temperature later to get forming and fixing agent is arrived.
Further, the parts by weight of the raw material of mixture A are as follows:
10-20 parts of phenolic resin, 8-18 parts of polyvinyl butyral, 4-12 parts of polyvinyl alcohol, 5-10 parts of water-soluble silicon oil,
5-15 parts of paraffin oil.
Further, the parts by weight of the raw material of mixture B are as follows:
3-8 parts of triethanolamine, 10-20 parts of polyacrylamide, 2-8 parts of coco amine, 4-12 parts of carboxymethyl cellulose, curing
6-12 parts of molybdenum.
Further, in step C acrylic resin powder, titanium dioxide and deionized water parts by weight are as follows:
4-10 parts of acroleic acid resin powder, 3-9 parts of titanium dioxide, 20-30 parts of deionized water.
Further, the temperature being mixed in step A is 80-120 DEG C, and the time of mixing is 10-20min.
Further, the rate being mixed in step B is 1000-3000 revs/min, and the time of mixing is 20-
30min。
Further, the temperature of heating water bath is 52-58 DEG C in step C.
Above-mentioned forming and fixing agent is applied in the molding of 3D printing precoated sand.
Compared with prior art, the invention has the advantages that
Forming and fixing agent prepared by the present invention can be improved the adhesive strength of precoated sand in the molding of 3D printing precoated sand, together
When also improve the weatherabilities such as heat resistance, the resistance to ag(e)ing of precoated sand, extend the service life of precoated sand.It is prepared by the present invention
Adhesive strength of the forming and fixing agent in the molding of 3D printing precoated sand is 5.1MPa-5.5MPa, and adhesive strength is considerably beyond existing
Forming and fixing agent in technology；Required curing time is 3.0min-3.6min, and curing time greatly shortens；And 3D printing
Precoated sand temperature resistant to high temperature is 230 DEG C -238 DEG C, is beaten considerably beyond the 3D for using forming and fixing agent in the prior art to prepare
Print precoated sand.
Wherein, acrylic resin powder, the titanium dioxide added in the present invention can be improved the high temperature resistance of curing agent, into
And improve the high temperature resistance of precoated sand；The paraffin oil and carboxymethyl cellulose of addition can further increase the viscous of precoated sand
Close intensity.Meanwhile phenolic resin, the polyvinyl alcohol of addition can play the role of binder, Gu use the molding in the present invention
Curing agent also can be shortened curing time.
In addition, the preparation process that the present invention uses is easy to operate, preparation process is environment friendly and pollution-free.Wherein, the present invention uses
Heating water bath can prevent forming and fixing agent from caking phenomenon occur, and playing prevents from influencing cured effect.
Specific embodiment
Below by the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work, belong to guarantor of the invention
Protect range.
The step A of forming and fixing agent preparation process is mixed raw material using kneading machine in present embodiment, walks
Rapid B is mixed raw material using stirred tank, and step C carries out heating water bath to raw mixture using water-bath.
Embodiment 1
In the present embodiment forming and fixing agent preparation process the following steps are included:
A, by 10 parts of phenolic resin, 8 parts of polyvinyl butyrals, 4 parts of polyvinyl alcohol, 5 parts of water-soluble silicon oils, 5 parts of paraffin
Oil is added in kneading machine, is mixed at being 80 DEG C in temperature, obtains mixture A after 10min is mixed；
B, by 3 parts of triethanolamines, 10 parts of polyacrylamides, 2 parts of coco amines, 4 parts of carboxymethyl celluloses, 6 parts of molybdenum disulfide
It is added in the stirred tank that stirring rate is 1000 revs/min and is mixed, obtain mixture B after 20min is mixed；
C, said mixture B is added in said mixture A, adds 4 parts of acroleic acid resin powder, 3 parts of titanium dioxides
With 20 parts of deionized waters, be added in water-bath after mixing, 52 DEG C at a temperature of carry out heating water bath, and be stirred continuously, until
Mixture in the pasty state, slowly cools to room temperature later to get forming and fixing agent is arrived.
Embodiment 2
In the present embodiment forming and fixing agent preparation process the following steps are included:
A, by 20 parts of phenolic resin, 18 parts of polyvinyl butyrals, 12 parts of polyvinyl alcohol, 10 parts of water-soluble silicon oils, 15 parts
Paraffin oil is added in kneading machine, is mixed at being 120 DEG C in temperature, obtains mixture A after 20min is mixed；
B, by 8 parts of triethanolamines, 20 parts of polyacrylamides, 8 parts of coco amines, 12 parts of carboxymethyl celluloses, 12 parts of curing
Molybdenum is added in the stirred tank that stirring rate is 3000 revs/min and is mixed, and obtains mixture B after 30min is mixed；
C, said mixture B is added in said mixture A, adds 10 parts of acroleic acid resin powder, 9 parts of titanium dioxides
With 30 parts of deionized waters, be added in water-bath after mixing, 58 DEG C at a temperature of carry out heating water bath, and be stirred continuously, until
Mixture in the pasty state, slowly cools to room temperature later to get forming and fixing agent is arrived.
Embodiment 3
In the present embodiment forming and fixing agent preparation process the following steps are included:
A, by 12 parts of phenolic resin, 9 parts of polyvinyl butyrals, 5 parts of polyvinyl alcohol, 6 parts of water-soluble silicon oils, 7 parts of paraffin
Oil is added in kneading machine, is mixed at being 85 DEG C in temperature, obtains mixture A after 12min is mixed；
B, by 4 parts of triethanolamines, 12 parts of polyacrylamides, 3 parts of coco amines, 6 parts of carboxymethyl celluloses, 7 parts of molybdenum disulfide
It is added in the stirred tank that stirring rate is 1500 revs/min and is mixed, obtain mixture B after 22min is mixed；
C, said mixture B is added in said mixture A, adds 5 parts of acroleic acid resin powder, 4 parts of titanium dioxides
With 22 parts of deionized waters, be added in water-bath after mixing, 54 DEG C at a temperature of carry out heating water bath, and be stirred continuously, until
Mixture in the pasty state, slowly cools to room temperature later to get forming and fixing agent is arrived.
Embodiment 4
In the present embodiment forming and fixing agent preparation process the following steps are included:
A, by 18 parts of phenolic resin, 16 parts of polyvinyl butyrals, 11 parts of polyvinyl alcohol, 9 parts of water-soluble silicon oils, 13 parts of stones
Wax oil is added in kneading machine, is mixed at being 110 DEG C in temperature, obtains mixture A after 18min is mixed；
B, by 7 parts of triethanolamines, 18 parts of polyacrylamides, 7 parts of coco amines, 11 parts of carboxymethyl celluloses, 11 parts of curing
Molybdenum is added in the stirred tank that stirring rate is 2800 revs/min and is mixed, and obtains mixture B after 28min is mixed；
C, said mixture B is added in said mixture A, adds 9 parts of acroleic acid resin powder, 8 parts of titanium dioxides
With 28 parts of deionized waters, be added in water-bath after mixing, 53 DEG C at a temperature of carry out heating water bath, and be stirred continuously, until
Mixture in the pasty state, slowly cools to room temperature later to get forming and fixing agent is arrived.
Embodiment 5
In the present embodiment forming and fixing agent preparation process the following steps are included:
A, by 16 parts of phenolic resin, 14 parts of polyvinyl butyrals, 10 parts of polyvinyl alcohol, 7 parts of water-soluble silicon oils, 9 parts of stones
Wax oil is added in kneading machine, is mixed at being 105 DEG C in temperature, obtains mixture A after 16min is mixed；
B, by 7 parts of triethanolamines, 16 parts of polyacrylamides, 3 parts of coco amines, 10 parts of carboxymethyl celluloses, 6 parts of molybdenum disulfide
It is added in the stirred tank that stirring rate is 1400 revs/min and is mixed, obtain mixture B after 26min is mixed；
C, said mixture B is added in said mixture A, adds 8 parts of acroleic acid resin powder, 4 parts of titanium dioxides
With 24 parts of deionized waters, be added in water-bath after mixing, 57 DEG C at a temperature of carry out heating water bath, and be stirred continuously, until
Mixture in the pasty state, slowly cools to room temperature later to get forming and fixing agent is arrived.
Embodiment 6
In the present embodiment forming and fixing agent preparation process the following steps are included:
A, by 15 parts of phenolic resin, 13 parts of polyvinyl butyrals, 8 parts of polyvinyl alcohol, 8 parts of water-soluble silicon oils, 10 parts of stones
Wax oil is added in kneading machine, is mixed at being 100 DEG C in temperature, obtains mixture A after 15min is mixed；
B, by 6 parts of triethanolamines, 15 parts of polyacrylamides, 5 parts of coco amines, 8 parts of carboxymethyl celluloses, 9 parts of molybdenum disulfide
It is added in the stirred tank that stirring rate is 2000 revs/min and is mixed, obtain mixture B after 25min is mixed；
C, said mixture B is added in said mixture A, adds 7 parts of acroleic acid resin powder, 6 parts of titanium dioxides
With 25 parts of deionized waters, be added in water-bath after mixing, 55 DEG C at a temperature of carry out heating water bath, and be stirred continuously, until
Mixture in the pasty state, slowly cools to room temperature later to get forming and fixing agent is arrived.
Comparative example 1
Use methenamine to be applied in 3D printing precoated sand moulding process as curing agent, is prepared into 3D printing overlay film
Sand.
Forming and fixing agent used in forming and fixing agent made from various embodiments of the present invention and comparative example 1 is applied to 3D
It prints in precoated sand moulding process, carries out adhesive strength, curing time and the test of 3D printing precoated sand high temperature resistant respectively, counted
According to being as follows:
| Adhesive strength (MPa) | Curing time (min) | High temperature resistant (DEG C) | |
| Embodiment 1 | 5.2 | 3.5 | 230 |
| Embodiment 2 | 5.2 | 3.4 | 232 |
| Embodiment 3 | 5.1 | 3.5 | 236 |
| Embodiment 4 | 5.3 | 3.6 | 235 |
| Embodiment 5 | 5.3 | 3.4 | 234 |
| Embodiment 6 | 5.5 | 3.0 | 238 |
| Comparative example 1 | 3.6 | 6.3 | 179 |
By upper table analysis it is found that the forming and fixing agent prepared respectively by embodiment 1-6 forms work in 3D printing precoated sand
Adhesive strength, curing time in skill are superior to methenamine used in comparative example 1, and the 3D printing precoated sand being prepared
Heat-resisting quantity be equally better than the 3D printing precoated sand being prepared in comparative example 1.
The acrylic resin powder, the titanium dioxide that add in the present invention can be improved the high temperature resistance of curing agent, Jin Erti
The high temperature resistance of high precoated sand；The paraffin oil and carboxymethyl cellulose of addition, the bonding that can further increase precoated sand are strong
Degree.Meanwhile the poly- second of phenolic resin of addition, enol can play the role of binder, therefore the forming and fixing agent in the present invention
It also can be shortened curing time.
So the bonding that forming and fixing agent prepared by the present invention can be improved precoated sand in the molding of 3D printing precoated sand is strong
Degree, while the weatherabilities such as the heat resistance of precoated sand, resistance to ag(e)ing are also improved, extend the service life of precoated sand.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (6)
1. a kind of forming and fixing agent, which is characterized in that its raw material includes: 10-20 parts of phenolic resin, polyvinyl alcohol contracting by weight
8-18 parts of butyraldehyde, 4-12 parts of polyvinyl alcohol, 5-10 parts of water-soluble silicon oil, 3-8 parts of triethanolamine, 10-20 parts of polyacrylamide, coconut palm
2-8 parts of oleyl amine, 5-15 parts of paraffin oil, 4-12 parts of carboxymethyl cellulose, 4-10 parts of acroleic acid resin powder, 3-9 parts of titanium dioxide, two
6-12 parts of molybdenum sulfide and 20-30 parts of deionized water.
2. a kind of preparation process of forming and fixing agent as described in claim 1, which comprises the steps of:
A, phenolic resin, polyvinyl butyral, polyvinyl alcohol, water-soluble silicon oil, paraffin oil are mixed, after mixing
Obtain mixture A；
B, triethanolamine, polyacrylamide, coco amine, carboxymethyl cellulose, molybdenum disulfide are mixed, after mixing
Mixture B；
C, it takes said mixture B to be added in said mixture A, adds acrylic resin powder, titanium dioxide and deionized water,
Heating water bath after mixing, and be stirred continuously, slowly cool to room temperature later to get forming and fixing agent is arrived.
3. a kind of preparation process of forming and fixing agent according to claim 2, which is characterized in that mixed in the step A
The temperature of stirring is 80-120 DEG C, and the time of mixing is 10-20min.
4. a kind of preparation process of forming and fixing agent according to claim 2, which is characterized in that mixed in the step B
The rate of stirring is 1000-3000 revs/min, and the time of mixing is 20-30min.
5. a kind of preparation process of forming and fixing agent according to claim 2, which is characterized in that water-bath in the step C
The temperature of heating is 52-58 DEG C.
6. application of the forming and fixing agent described in claim 1 in the molding of 3D printing precoated sand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711027233.0A CN108339929B (en) | 2017-10-27 | 2017-10-27 | A kind of forming and fixing agent and its preparation process and application |
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| CN201711027233.0A CN108339929B (en) | 2017-10-27 | 2017-10-27 | A kind of forming and fixing agent and its preparation process and application |
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| CN108339929B true CN108339929B (en) | 2019-04-30 |
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| CN112872293B (en) * | 2020-12-30 | 2022-05-24 | 新沂市锡沂高新材料产业技术研究院有限公司 | Precoated sand casting process for manufacturing deep hole shaft |
| CN112723830A (en) * | 2021-01-06 | 2021-04-30 | 蔡琳洁 | Manufacturing process of building anti-seismic building concrete block |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5423026A (en) * | 1977-07-25 | 1979-02-21 | Onoda Cement Co Ltd | Method of making mold using cement sand |
| JPS60111734A (en) * | 1983-11-24 | 1985-06-18 | Arakawa Chem Ind Co Ltd | Resin composition for shell molding sand |
| US5043412A (en) * | 1988-06-23 | 1991-08-27 | Borden, Inc. | Ambient temperature curing, high carbon contributing compositions |
| DE102005009636B4 (en) * | 2005-03-03 | 2016-08-11 | Bayerische Motoren Werke Aktiengesellschaft | Method of generating a sand mold generatively |
| CA2734883A1 (en) * | 2008-08-29 | 2010-03-04 | Basf Se | Method for binding non-solid oxidic inorganic materials with etherified aminoplast resins and cured compositions of said materials and etherified aminoplast resins |
| CN101941045B (en) * | 2009-07-10 | 2012-10-03 | 湖北工业大学 | Preparation method and application of phosphate inorganic casting binder suspension curing agent |
| CN104550654A (en) * | 2013-10-24 | 2015-04-29 | 青岛和德隆机械有限公司 | Chilled resin for casting |
| CN106396505A (en) * | 2016-08-30 | 2017-02-15 | 宁夏共享模具有限公司 | High-strength full-color sandstone based on 3DP rapid prototyping and preparation process thereof |
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