CN107282870B - A kind of preparation method of high intensity furan resin-sand - Google Patents
A kind of preparation method of high intensity furan resin-sand Download PDFInfo
- Publication number
- CN107282870B CN107282870B CN201710559182.XA CN201710559182A CN107282870B CN 107282870 B CN107282870 B CN 107282870B CN 201710559182 A CN201710559182 A CN 201710559182A CN 107282870 B CN107282870 B CN 107282870B
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- China
- Prior art keywords
- sand
- preparation
- furan resin
- roughing sand
- roughing
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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
- 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
- B22C1/224—Furan polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
Abstract
The invention discloses a kind of preparation methods of high-intensitive furan resin-sand, it cleaned, be classified the following steps are included: roughing sand is placed in screening machine by (1), guarantee close per a batch of roughing sand size distribution, the roughing sand of classification carries out washing process, is dried 20-30min under the conditions of 100-105 DEG C after cleaning；(2) treated, and roughing sand is sent into pressurized tank, open agitating device, sequentially add bonding agent, curing agent, it is forced into 0.15-0.2MPa rapidly after being quickly stirred 1-5min, pressure maintaining handles release after 1-5min, go out material boxing after continuing to be stirred 20-30min, after fully hardened under the conditions of 30-35 DEG C, wherein roughing sand, bonding agent, curing agent three weight ratio be 1000:(10-50): (5-10).
Description
Technical field
The present invention relates to casting resin sand technical field more particularly to a kind of preparation methods of high-intensitive furan resin-sand.
Background technique
Sand-cast accounts for the very big specific gravity of casting output in China, the main reason is that the material source of sand casting is wide
It is general, low in cost, it is a kind of most commonly seen casting method.At present in casting process, side that the preparation of sand mold generallys use
Method includes common self-hardening resin bonded sand mould, phenolic resin shell mould and waterglass model casting.Molding sand has the quality of casting
Very important influence.The stomata of casting, scab, scab, hot tearing and surface quality, dimensional accuracy etc. all with used molding sand
There are much relations.Clay-beaded sand, inorganic bond dosage form (core) sand and organic adhesive dosage form can be divided by binder molding sand used
(core) sand etc..The use of various organic and inorganic binders has effectively pushed the progress of molding and core making method, wherein to glue from hard
Tie the with the fastest developing speed of agent.Wherein furane resins are since low with viscosity, intensity is high, high temperature resistance is good, gas permeability is strong, routed
The advantages that property is good, production cost is low, synthesis technology is simple is dissipated, and the excellent characteristics with resistance to strong acid, highly basic and organic solvent, because
This promotes the commonly used of furane resins.
Furane resins as the shortcomings that organic macromolecular adhesives be it is hygroscopic, moisture resistance is poor.In resin film solidification process
In, dehydration, since moisture is easier to soak compared with resin to roughing sand, be easier to sand grain surface coat, cause roughing sand surface with
One of moisture film is formed between resin film, leads to the strength reduction of resin sand, is industrially mainly passed through to improve this problem
The moisture in furane resins is reduced, specific dewatering process mostly uses fast dewatering under condition of high vacuum degree, low temperature, but when dehydration
Resin can be made to cause the resin film for coating sand grains to be unevenly distributed so that there is defect or cladding because viscosity is excessively high when measuring larger
The imperfect strength reduction for also resulting in molding sand.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides a kind of preparation side of high-intensitive furan resin-sand
Method.
The present invention is achieved by the following technical solutions:
A kind of preparation method of high intensity furan resin-sand, comprising the following steps:
(1) roughing sand is placed in screening machine and is cleaned, is classified, guarantee, classification close per a batch of roughing sand size distribution
Roughing sand carry out washing process, be dried 20-30min under the conditions of 100-105 DEG C after cleaning；
(2) treated, and roughing sand is sent into pressurized tank, is opened agitating device, is sequentially added bonding agent, curing agent, quickly stir
It is forced into 0.15-0.2MPa rapidly after mixing mixing 1-5min, pressure maintaining handles release after 1-5min, continues to be stirred 20-30min
Afterwards go out material boxing, after fully hardened under the conditions of 30-35 DEG C, wherein roughing sand, bonding agent, curing agent three weight ratio be
1000:(10-50): (5-10).
The roughing sand is zircon sand, quartz sand, magnesia, old sand, two or more mixing in nice foundry sand.
The bonding agent is that furane resins are formed with amphiphilic block copolymer, solvent according to the molar ratio of 1:1:5.
The amphiphilic block copolymer is polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer
One of P123 or F127.
The solvent is one of methanol, dimethylformamide, dimethyl acetamide, hexamethylene.
The curing agent is one of toluenesulfonic acid, xylene monosulfonic acid, Methylsulfate and graphene oxide according to 1:
0.1 parts by weight compound.
Roughing sand is first passed through several steps such as removal of impurities, classification, cleaning, dry during the preparation process by furan resin-sand of the invention
Suddenly, using partial size, approximate, the approximate roughing sand of shape is then multiple with amphiphilic block copolymer and furane resins as a production batch
With system as bonding agent, the hydrophobic side of amphiphilic block copolymer and furane resins have good compatibility, water-wet side and roughing sand
There is good compatibility, to improve resin in the wellability on roughing sand surface, the moisture in resin curing process can be discharged,
Rather than seal up for safekeeping among resin and roughing sand, effectively raise bonding interface intensity；In addition, passing through pressurization during mulling
Processing is quickly discharged the air between resin film and roughing sand, reduces voidage, further improve the intensity of resin sand.
Specific embodiment
A kind of preparation method of high intensity furan resin-sand, comprising the following steps:
(1) roughing sand is placed in screening machine and is cleaned, is classified, guarantee, classification close per a batch of roughing sand size distribution
Roughing sand carry out washing process, be dried 20min under the conditions of 100 DEG C after cleaning；
(2) treated, and roughing sand is sent into pressurized tank, is opened agitating device, is sequentially added bonding agent, curing agent, quickly stir
It is forced into 0.15MPa rapidly after mixing mixing 1min, pressure maintaining handles release after 1min, continues to go out material boxing after being stirred 20min,
Under the conditions of 30 DEG C it is fully hardened after, wherein roughing sand, bonding agent, curing agent three weight ratio be 1000:10:5.
Wherein roughing sand is zircon sand, quartz sand, nice foundry sand mix.
Wherein bonding agent be furane resins and polyethylene oxide polypropylene oxide polyethylene oxide triblock copolymer P123,
Dimethylformamide is formed according to the molar ratio of 1:1:5.
Wherein curing agent is that toluenesulfonic acid is compounded with graphene oxide according to the parts by weight of 1:0.1.
Claims (5)
1. a kind of preparation method of high intensity furan resin-sand, which comprises the following steps:
(1) roughing sand is placed in screening machine and is cleaned, is classified, guarantee, the original of classification close per a batch of roughing sand size distribution
Sand carries out washing process, is dried 20-30min under the conditions of 100-105 DEG C after cleaning；
(2) treated, and roughing sand is sent into pressurized tank, is opened agitating device, is sequentially added bonding agent, curing agent, and quickly stirring is mixed
It is forced into 0.15-0.2MPa rapidly after closing 1-5min, pressure maintaining handles release after 1-5min, continues to go out after being stirred 20-30min
Material boxing, after fully hardened under the conditions of 30-35 DEG C, wherein roughing sand, bonding agent, curing agent three weight ratio be
1000:(10-50): (5-10)；
The bonding agent is that furane resins are formed with amphiphilic block copolymer, solvent according to the molar ratio of 1:1:5.
2. a kind of preparation method of high-intensitive furan resin-sand as described in claim 1, which is characterized in that the roughing sand is
Zircon sand, quartz sand, magnesia, the two or more mixing in nice foundry sand.
3. a kind of preparation method of high-intensitive furan resin-sand as described in claim 1, which is characterized in that the amphiphilic is embedding
Section copolymer is polyethylene oxide-polypropylene oxide-one of polyethylene oxide triblock copolymer P123 or F127.
4. a kind of preparation method of high-intensitive furan resin-sand as described in claim 1, which is characterized in that the solvent is
One of methanol, dimethylformamide, dimethyl acetamide, hexamethylene.
5. a kind of preparation method of high-intensitive furan resin-sand as described in claim 1, which is characterized in that the curing agent
It is compounded with graphene oxide according to the parts by weight of 1:0.1 for one of toluenesulfonic acid, xylene monosulfonic acid, Methylsulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710559182.XA CN107282870B (en) | 2017-07-11 | 2017-07-11 | A kind of preparation method of high intensity furan resin-sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710559182.XA CN107282870B (en) | 2017-07-11 | 2017-07-11 | A kind of preparation method of high intensity furan resin-sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107282870A CN107282870A (en) | 2017-10-24 |
| CN107282870B true CN107282870B (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710559182.XA Active CN107282870B (en) | 2017-07-11 | 2017-07-11 | A kind of preparation method of high intensity furan resin-sand |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113227315A (en) * | 2019-01-07 | 2021-08-06 | 陶氏环球技术有限责任公司 | Assembly line type continuous proppant coating method |
| CN112139441A (en) * | 2019-06-27 | 2020-12-29 | 南京辉腾机械铸造有限公司 | Resin sand regeneration production method |
| CN111496177B (en) * | 2020-06-03 | 2022-02-25 | 中车戚墅堰机车车辆工艺研究所有限公司 | Furan resin self-hardening sand, manufacturing method thereof and casting sand mold |
| CN112453315A (en) * | 2020-11-13 | 2021-03-09 | 西安昆仑工业（集团）有限责任公司 | Resin sand casting process of machine tool foot |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3413251A (en) * | 1963-09-20 | 1968-11-26 | Huttenes Kommanditgesellschaft | Materials for the manufacture of foundry molds and cores |
| CN1017316B (en) * | 1989-01-21 | 1992-07-08 | 河北机电学院 | Resin sand for foundry |
| JP4106212B2 (en) * | 2001-12-05 | 2008-06-25 | 日立化成工業株式会社 | Phenolic resin composition for shell mold and resin coated sand for shell mold mold |
| EP2271726A1 (en) * | 2008-04-17 | 2011-01-12 | Dow Global Technologies Inc. | Powder coated proppant and method of making the same |
| CN101722272B (en) * | 2009-11-19 | 2011-08-03 | 东方电气集团东方汽轮机有限公司 | Curing agent of self-hardening furan resin sand and preparation method thereof |
| CN103586400A (en) * | 2013-10-31 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Preparation process of furan resin sand |
| CN106574028B (en) * | 2014-08-29 | 2021-03-12 | 日本制纸株式会社 | Block copolymer and resin composition |
| CN105108046A (en) * | 2015-08-11 | 2015-12-02 | 安徽省胜峰机械有限公司 | High-strength calcium sulphate whisker modified furan resin sand for steel castings and preparation method thereof |
| CN105127362A (en) * | 2015-08-18 | 2015-12-09 | 宁夏共享化工有限公司 | Preparation method for quick-hardening furan resin-sand |
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| CN107282870A (en) | 2017-10-24 |
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