CN1019755B - Binder for casting - Google Patents
Binder for castingInfo
- Publication number
- CN1019755B CN1019755B CN89100746A CN89100746A CN1019755B CN 1019755 B CN1019755 B CN 1019755B CN 89100746 A CN89100746 A CN 89100746A CN 89100746 A CN89100746 A CN 89100746A CN 1019755 B CN1019755 B CN 1019755B
- Authority
- CN
- China
- Prior art keywords
- grease
- hours
- binding agent
- casting
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Lubricants (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of binder for casting and preparation method thereof, this binding agent is applicable to that foundary industry manufactures the sand mold of different shape.The composition of this binding agent is to be primary raw material by 70%～74% sunflower grease, vegetable seed grease leftover bits and pieces, adds chemical industry auxiliary material such as 201～100 an amount of methyl-silicone oils, 1%～2% pentaerythrite, 23%～28%10 asphalt and forms; Its method of producing is at 120～150 ℃ of refining garbage greases, be refined to water content less than till 0.2%, acid 3～5 hours is fallen at 200～220 ℃, 240 ℃ of oxygen blast polyase 13～5 hour, in the time of 150～200 ℃, drop into pitch, reacted two hours, and went out still, make it to become a kind of thick material of the matter that has specific characteristics at 100～80 ℃.Cost of the present invention is low, and adhesive property is good, no scab, gas hole defect.
Description
The present invention relates to a kind of binder for casting and preparation method thereof, this binding agent is used for the sand mold that foundary industry is manufactured different shape.
Casting is of a great variety with organic binder bond in existing technology, traditional vegetable oil core is promptly arranged, the hot box core of useful synthetic resin again, source by material is divided into three major types: the first kind, and the vegetable oil binding agent is the grease of being produced by vegetable seeds or fruit, mainly based on tung oil, linseed oil, the derivative that belongs to hydrocarbon is chemically belonging to the ester class, is to be made of aliphatic acid and glycerine (glycerine); Second class, synthetic fat binder derives from chemical industry, light industrys such as soapmaking, papermaking and PETROLEUM PROCESSING and pays product.Main component is C
2O-C
3The alkane of O is raw material by paraffin, extracts the residue of synthetic fatty acid, and the solubilizer dilution forms again; The 3rd class.Araldite also is one of novel binders, and this class material temporarily can't satisfy the needs in the casting at present, so use very little.
In the above-mentioned organic binder bond, tung oil in the vegetable oil binding agent, linseed oil is that China's casting applicating history is the longest, one of Modeling Material that processing performance is best, but because tung oil, linseed oil is again the valuable raw material of present national defense industry and other industry, be used for foundary industry from not too reasonable economically, from and invented synthetic fat binder and substituted the vegetable oil binding agent, they have many approximate on technology, but indivedual performances of the latter are not as good as the former, as: it is mobile poor to close fat sand, creep properties is big, adhere to core box etc. easily, this shows that Modeling Material occupies an important position in foundary industry, because it and casting quality, cost, production efficiency and working condition all have confidential relation.
A kind of novel casting industrial modeling material one binder for casting and the preparation method thereof that the objective of the invention is to avoid above-mentioned deficiency of the prior art and provide.
Purpose of the present invention can reach by following measure:
One, the raw material proportioning that binding agent is produced is as follows:
Raw material proportioning: 100%
1. sunflower grease, vegetable seed grease leftover bits and pieces (residual oil): 70%～74%;
2.201～100 methyl-silicone oils are an amount of: (not accounting for percentage);
3. pentaerythrite 1%-2%;
4.10 asphalt 23%～28%.
Two. preparation method:
1. at 120-150 ℃ of refining garbage grease, be refined to water content less than till 0.2%;
2. pentaerythrite falls sour temperature at 200～220 ℃, and falling the acid time is 3～5 hours;
3. 240 ℃ of oxygen blast polymerizations, oxygen supply time is 3～5 hours;
4. drop into pitch at 150～200 ℃, reacted 2 hours;
5. going out the still temperature is 100～80 ℃.The cooling inspection by sampling goes out the still warehouse-in after qualified.
1. slightly refine garbage grease: earlier a small amount of garbage grease is poured in the still, firing up starts agitator then, slowly heat up, when temperature reaches attention this moment about 120 ℃, the oil spilling phenomenon takes place, as excessive in the reaction, can suitably drip standby silicone oil is controlled, slowly add garbage grease while tempering, temperature is raised to 150 ℃ after garbage grease is added to ratio, at this moment constant temperature, be refined to content less than 0.2% o'clock up to garbage grease moisture, refining finishes.
2. acid falls in pentaerythrite: the garbage grease that refining is good, put into the reactive polymeric still that has agitator in proportion, firing up, during oil temperature rise to 180 ℃, start agitator, slowly add the pentaerythrite of ormal weight, approximately added in 2-3 hour, temperature is raised to 220 ℃ again and continues reaction about 3-5 hour, the maintenance esterification is to acid number below 30;
3. oxygen blast polymerization: for fast reaction speed, taking this process of oxygen blast polymerization, mainly is that oxygen is blown in the reactor with air pump, and this moment, profit had bubble to form 240 ℃ of reaction temperatures, about 3～5 hours of reaction time.
4. add 10
#Asphalt: a certain amount of asphalt is put into another still, dissolve, stir and to join temperature and dropped in 150 ℃ the polymeric kettle for behind the liquid, fully mixed about 2 hours, after reacting completely, reduce the temperature to below 100-80 ℃, by the testing department sampling, can go out the still warehouse-in after the assay was approved.
Advantage of the present invention is: the value that has improved plant oil leftover, garbage grease is digested on the spot, with low cost, raw material sources are abundant, and process equipment is simple, and adhesive property is good, solved the valuable shortage of pure vegetable oil, remedy the deficiency that mineral oil leftover bits and pieces binding agent brings for the core sand processing performance, improved the value of plant oil leftover, be new approach of foundary industry type selecting material developing.
Embodiment: below in conjunction with the concrete detailed description technical process of the present invention of implementing.
1. use still to hold 500 kilograms;
2. raw material uses: 365 kilograms of garbage greases, 0.25 kilogram of 201-100 methyl-silicone oil, 10 kilograms of pentaerythrites, 125 kilograms of pitches;
3. producers 2 people,
4. preparation method:
(1) refining sunflower oil, rapeseed oil garbage grease: the raw material garbage grease is put into the reactive polymeric still for 365 kilograms, starting point is burnt blast furnace and is heated, because garbage grease moisture is bigger, the height that edges up then along with the oil temperature, drip silicone oil according to the rise degree of oil, excessive to control oily foam, when the oily foam of moisture evaporation can prepare to throw in auxiliary material in beginning to disappear, the highest control of moisture processing procedure temperature has 200 ℃, and suitably starts agitator.
(2) acid falls in pentaerythrite: when the garbage grease temperature that refining treatment is crossed is elevated to 200～220 ℃, start agitator, slowly add pentaerythrite while stirring.
(3) oxygen blast polymerization: the rapid 240 ℃ of left and right sides constant temperature that heat up of the garbage grease that adds pentaerythrite, air blowing oxygen supply 3-4 hour makes fully reactive polymeric of oil.
(4) add 10
#Asphalt after polymerization: oxygen blast is aggregated to a certain degree garbage grease when being cooled to 200 ℃, starts to stir and drop into pitch, treat that dissolving the back with oil fully continues to lower the temperature about about 100 ℃-80 ℃.
(5) inspection by sampling: cool the temperature to the finished product inspection by sampling about 80-100 ℃, go out still after qualified to adorn in 180 kilograms of pail packs and can put in storage, whole technology was carried out time accumulative total 24 hours.
This still output: 497 kilograms, wherein lose quantity and be moisture evaporation and go out still and spill stream.
Assay: viscosity: 24 seconds, acid value: 31.5 milliliters/gram, intensity 15.3 kilograms per centimeter met technical standard.
Claims (2)
1, a kind of binder for casting is characterized in that the composition of this binding agent and degree thereof are:
(1) sunflower grease, vegetable seed grease leftover bits and pieces: 70%～74%
(2) 201～100 methyl-silicone oils, an amount of (not accounting for percentage);
(3) pentaerythrite 1%～2%;
(4) 10 asphalt 23%～28%.
2, a kind of preparation method of binder for casting as claimed in claim 1 is characterized in that the preparation method of this binding agent is:
(1), is refined to water content less than till 0.2% at 120-150 ℃ of refining garbage grease;
(2) pentaerythrite falls sour temperature at 200～220 ℃, and falling the acid time is 3～5 hours;
(3) at the poly-platform of 240 ℃ of oxygen blast, oxygen supply time is 3～5 hours;
(4) drop into pitch at 150～200 ℃, reacted 2 hours;
(5) going out the axe temperature is 100～80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89100746A CN1019755B (en) | 1989-02-05 | 1989-02-05 | Binder for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89100746A CN1019755B (en) | 1989-02-05 | 1989-02-05 | Binder for casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1044607A CN1044607A (en) | 1990-08-15 |
| CN1019755B true CN1019755B (en) | 1992-12-30 |
Family
ID=4854007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89100746A Expired CN1019755B (en) | 1989-02-05 | 1989-02-05 | Binder for casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019755B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049616C (en) * | 1994-05-23 | 2000-02-23 | 王清泉 | Binder for casting core and synthesis technology |
| CN102659425B (en) * | 2012-04-19 | 2013-11-20 | 沈阳东大冶金科技股份有限公司 | Passivated drainage sand with coating for ladle refining and preparation method thereof |
| CN106734862A (en) * | 2016-12-16 | 2017-05-31 | 池州恒和精密机械有限公司 | A kind of chemicosolidifying sand casting binding agent |
| CN106955966B (en) * | 2017-04-07 | 2019-05-03 | 郑宏伟 | A kind of casting inorganic binder and preparation method thereof |
-
1989
- 1989-02-05 CN CN89100746A patent/CN1019755B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044607A (en) | 1990-08-15 |
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| C10 | Entry into substantive examination | ||
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |