CN107282870A - 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
- CN107282870A CN107282870A CN201710559182.XA CN201710559182A CN107282870A CN 107282870 A CN107282870 A CN 107282870A CN 201710559182 A CN201710559182 A CN 201710559182A CN 107282870 A CN107282870 A CN 107282870A
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- China
- Prior art keywords
- sand
- preparation
- high intensity
- furan resin
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of preparation method of high intensity furan resin-sand, comprise the following steps：（1）Roughing sand is placed in screening machine through removal of impurities, classification, it is ensured that approached per a batch of roughing sand size distribution, the roughing sand of classification carries out washing process, cleaning terminate after under the conditions of 100 105 DEG C the 30min of drying process 20；（2）In roughing sand feeding pressurized tank after processing, open agitating device, sequentially add bonding agent, curing agent, 0.15 0.2MPa is forced into after 1 5min of quick stirring mixing rapidly, pressurize handles release after 1 5min, continue to go out material boxing after stirring 20 30min of mixing, it is fully hardened under the conditions of 30 35 DEG C after, wherein roughing sand, bonding agent, the weight ratio of curing agent three are 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 method of high intensity furan resin-sand.
Background technology
Sand-cast accounts for the very big proportion of casting output in China, and its main cause is that the material source of sand casting is wide
It is general, with low cost, it is a kind of most commonly seen casting method.At present in casting process, the side that the preparation of sand mold is generally used
Method includes common self-hardening resin bonded sand mould, phenolic resin shell mould and waterglass model casting.Molding sand has to 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.It can be divided into clay-beaded sand, inorganic bond formulation by binding agent molding sand used（Core）Sand and organic adhesive formulation
（Core）Sand etc..The use of various organic and inorganic binding agents has effectively promoted the progress of molding and core making method, wherein to be glued from hard
Tie the with the fastest developing speed of agent.Wherein furane resins are due to viscosity is low, intensity is high, resistance to elevated temperatures good, gas permeability is strong, routed
The advantages of property is good, production cost is low, synthesis technique is simple, and the excellent specific property with resistance to strong acid, highly basic and organic solvent are dissipated, because
This promotes the commonly used of furane resins.
Shortcoming of the furane resins as organic macromolecular adhesives is hygroscopic, and moisture resistance is poor.In resin film solidification process
In, moisture separate out, due to moisture than resin to roughing sand be more easy to wetting, be more easy to sand grain surface coat, cause roughing sand surface with
One of moisture film is formed between resin film, causes the intensity decreases of resin sand, is industrially mainly to improve this problem and passes through
The moisture in furane resins is reduced, fast dewatering under condition of high vacuum degree, low temperature is used more specific dewatering process, but when dehydration
Resin can be made to cause the resin film skewness for coating sand grains so that there is defect or cladding because viscosity is too high when measuring larger
The imperfect intensity decreases for again resulting in molding sand.
The content of the invention
The object of the invention is exactly that there is provided a kind of preparation side of high intensity furan resin-sand in order to make up the defect of prior art
Method.
The present invention is achieved by the following technical solutions：
A kind of preparation method of high intensity furan resin-sand, comprises the following steps：
（1）Roughing sand is placed in screening machine through removal of impurities, classification, it is ensured that approached per a batch of roughing sand size distribution, the original of classification
Sand carry out washing process, cleaning terminate after under the conditions of 100-105 DEG C drying process 20-30min；
（2）In roughing sand feeding pressurized tank after processing, agitating device is opened, bonding agent, curing agent is sequentially added, quick stirring is mixed
Close and be forced into 0.15-0.2MPa after 1-5min rapidly, release after pressurize processing 1-5min continues to go out after stirring mixing 20-30min
Material boxing, it is fully hardened under the conditions of 30-35 DEG C after, wherein roughing sand, bonding agent, the weight ratio of curing agent three are
1000:（10-50）:（5-10）.
Described roughing sand is two or more mixing in zircon sand, quartz sand, magnesia, old sand, nice foundry sand.
Described bonding agent is furane resins and amphiphilic block copolymer, solvent according to 1:1:5 molar ratio is formed.
Described amphiphilic block copolymer is PEO-PPOX-PEO triblock copolymer
One kind in P123 or F127.
Described solvent is one kind in methanol, dimethylformamide, dimethyl acetamide, hexamethylene.
Described curing agent is for one kind in toluenesulfonic acid, xylene monosulfonic acid, Methylsulfate with graphene oxide according to 1：
0.1 parts by weight compounding is formed.
Roughing sand is first passed through several steps such as removal of impurities, classification, cleaning, drying by the furan resin-sand of the present invention in preparation process
Suddenly, then particle diameter is approximate, shape is approximate roughing sand is answered as a production batch with amphiphilic block copolymer with furane resins
With system as bonding agent, hydrophobic side and the furane resins of amphiphilic block copolymer have good compatibility, water-wet side and roughing sand
There is good compatibility, so as to improve wellability of the resin 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 raising bonding interface intensity；In addition, passing through pressurization during mulling
Processing, the air between quick discharge resin film and roughing sand, reduces voidage, further increases the intensity of resin sand.
Embodiment
A kind of preparation method of high intensity furan resin-sand, comprises the following steps：
（1）Roughing sand is placed in screening machine through removal of impurities, classification, it is ensured that approached per a batch of roughing sand size distribution, the original of classification
Sand carry out washing process, cleaning terminate after under the conditions of 100 DEG C drying process 20min；
（2）In roughing sand feeding pressurized tank after processing, agitating device is opened, bonding agent, curing agent is sequentially added, quick stirring is mixed
Close and be forced into 0.15MPa after 1min rapidly, release after pressurize processing 1min continues to go out material boxing after stirring mixing 20min, 30
Under the conditions of 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 that zircon sand, quartz sand, nice foundry sand are mixed.
Wherein bonding agent be furane resins and PEO PPOX PEO triblock copolymer P123,
Dimethylformamide is according to 1:1:5 molar ratio is formed.
Wherein curing agent is toluenesulfonic acid and graphene oxide according to 1：0.1 parts by weight compounding is formed.
Claims (6)
1. a kind of preparation method of high intensity furan resin-sand, it is characterised in that comprise the following steps：
（1）Roughing sand is placed in screening machine through removal of impurities, classification, it is ensured that approached per a batch of roughing sand size distribution, the original of classification
Sand carry out washing process, cleaning terminate after under the conditions of 100-105 DEG C drying process 20-30min；
（2）In roughing sand feeding pressurized tank after processing, agitating device is opened, bonding agent, curing agent is sequentially added, quick stirring is mixed
Close and be forced into 0.15-0.2MPa after 1-5min rapidly, release after pressurize processing 1-5min continues to go out after stirring mixing 20-30min
Material boxing, it is fully hardened under the conditions of 30-35 DEG C after, wherein roughing sand, bonding agent, the weight ratio of curing agent three are
1000:（10-50）:（5-10）.
2. a kind of preparation method of high intensity furan resin-sand as claimed in claim 1, it is characterised in that described roughing sand is
Two or more mixing in zircon sand, quartz sand, magnesia, old sand, nice foundry sand.
3. a kind of preparation method of high intensity furan resin-sand as claimed in claim 1, it is characterised in that described bonding agent
It is furane resins and amphiphilic block copolymer, solvent according to 1:1:5 molar ratio is formed.
4. a kind of preparation method of high intensity furan resin-sand as claimed in claim 3, it is characterised in that described amphiphilic is embedding
Section copolymer is one kind in PEO-PPOX-PEO triblock copolymer P123 or F127.
5. a kind of preparation method of high intensity furan resin-sand as claimed in claim 3, it is characterised in that described solvent is
One kind in methanol, dimethylformamide, dimethyl acetamide, hexamethylene.
6. a kind of preparation method of high intensity furan resin-sand as claimed in claim 1, it is characterised in that described curing agent
For one kind in toluenesulfonic acid, xylene monosulfonic acid, Methylsulfate with graphene oxide according to 1：0.1 parts by weight compounding is formed.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN107282870A true CN107282870A (en) | 2017-10-24 |
| CN107282870B CN107282870B (en) | 2019-01-11 |
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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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496177A (en) * | 2020-06-03 | 2020-08-07 | 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 |
| 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 |
| 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 |
| 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 |
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| US9206349B2 (en) * | 2008-04-17 | 2015-12-08 | Dow Global Technologies Llc | Powder coated proppant and method of making the same |
| 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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| US3413251A (en) * | 1963-09-20 | 1968-11-26 | Huttenes Kommanditgesellschaft | Materials for the manufacture of foundry molds and cores |
| CN1044246A (en) * | 1989-01-21 | 1990-08-01 | 河北机电学院 | A kind of resin casting and compound method thereof |
| JP2003170244A (en) * | 2001-12-05 | 2003-06-17 | Hitachi Chem Co Ltd | Phenol resin composition for shell molding and resin coated sand for shell molding mold |
| US9206349B2 (en) * | 2008-04-17 | 2015-12-08 | Dow Global Technologies Llc | Powder coated proppant and method of making the same |
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Cited By (5)
| 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 |
| CN111496177A (en) * | 2020-06-03 | 2020-08-07 | 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 |
| 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 |
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| Publication number | Publication date |
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| CN107282870B (en) | 2019-01-11 |
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