CN1017316B - Resin sand for foundry - Google Patents
Resin sand for foundryInfo
- Publication number
- CN1017316B CN1017316B CN 89100399 CN89100399A CN1017316B CN 1017316 B CN1017316 B CN 1017316B CN 89100399 CN89100399 CN 89100399 CN 89100399 A CN89100399 A CN 89100399A CN 1017316 B CN1017316 B CN 1017316B
- Authority
- CN
- China
- Prior art keywords
- resin sand
- sand
- resin
- component
- core
- 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
- Mold Materials And Core Materials (AREA)
Abstract
The present invention relates to resin sand used for foundry and a preparation method thereof. The resin sand is characterized in that the resin sand is composed of sand used for making a mould (core), polyvinyl alcohol water solution or polycondensate of polyvinyl alcohol and aldehyde, furfuralcohol or furan resin, and an acidic mixture which comprises boron ions. The resin sand has the characteristics of low cost, good collapsibility, easy regeneration, little toxicity, simple and convenient use, etc. The preparation technology is simple. The resin sand used for foundry can replace chilled furan resin sand.
Description
The invention belongs to casting moulding (core) material.
Chilled furan resin sand is used in existing casting, is used for the casting mold (or core) of ferrous and nonferrous metals foundry goods, but its cost height, collapsibility is also undesirable, and regeneration is difficulty, and the reclaim equiment complexity has pollution to environment, so its application is subjected to certain limitation.
It is low to the purpose of this invention is to provide a kind of cost, and collapsibility is good, and regeneration is easy, and resin sand is used in the moulding of of low pollution (core).
Technical essential of the present invention is: remove in the resin sand component and comprise that moulding (or core) (refers generally to roughing sand with sand, also can be old sand or reclaimed sand) outside, also has component 1, promptly containing the 5-25%(weight ratio) aqueous solution of polyvinyl alcohol or polyvinyl alcohol and aldehydes be (as acetaldehyde, propionic aldehyde etc., formaldehyde preferably) condensation polymer, the hydroformylation degree is the 15-85% mole; Component 2, i.e. furfuryl alcohol or furane resins (as furfuryl alcohol modified urea-formaldehyde resin or furfural alcohol modified phenolic resin etc.); Component 3, i.e. the acidic mixture of boracic ion, as the alcoholic solution (as methyl alcohol, ethanol etc.) of p-methyl benzenesulfonic acid and boric acid, or the mixture of phosphoric acid and boric acid, or the alcohol of sulfuric acid and boric acid (as methyl alcohol, ethanol etc.) solution etc., the polyvinyl alcohol structures formula is
, the furfuryl alcohol structural formula is
Because the effect of component 3, component 1 and component 2 are reacted sclerosis at normal temperatures.
For making better performances, each component (weight ratio) is preferably: component 1 and component 2 additions are the 0.5-2.5% of moulding (or core) with sand, and component 3 additions are the 20-100% of component 1 and component 2 sums.
The compound method of this resin sand is, and is reinforced in the following order: use to moulding (or core) earlier to add component 3 in the sand, adding component 1 and component 2(again is that component 1 and component 2 can add one of them earlier, but also the time spent adds), and mix.
The present invention can reach casting dimension accuracy and the surface smoothness that chilled furan resin sand reaches, and cohesive force is strong, good combination property, cost is reduced significantly, and collapsibility is good, and is tasteless, substantially nontoxic, regeneration is easy, and nitrogen content is few, is difficult for making foundry goods to produce gas hole defect, stickness is not good, can replace chilled furan resin sand, be a kind of moulding (core) material that promotional value is arranged very much, can be widely used in the moulding or the coremaking of ferrous and nonferrous metals foundry goods.
Embodiment 1:
Get roughing sand 100kg, add the ethanolic solution 1kg that contains 75% p-methyl benzenesulfonic acid and 1% boric acid (accounting for solution weight percentage), add aqueous solution 1kg and the furfuryl alcohol 1kg that contains 10% polyvinyl alcohol (accounting for solution weight percentage) again, evenly mix with puddle mixer (or manual).
Embodiment 2:
Get roughing sand 100kg, add the ethanolic solution 1kg contain 49% sulfuric acid and 1% boric acid, adding the hydroformylation degree again is 75% mole polyvinyl alcohol and the condensation polymer 1kg of formaldehyde, adds furane resins 1kg(furfural alcohol modified phenolic resin at last) even mixing can use.
Claims (3)
1, resin sand is used in moulding (or core) in a kind of Foundry Production, it is characterized in that having in the component:
A, components I promptly contain the aqueous solution of 5-25% (weight ratio) polyvinyl alcohol or the condensation polymer of polyvinyl alcohol and aldehydes (the hydroformylation degree is the 15-85% mole), and its addition is the 0.5-2.5% (weight ratio) of moulding (or core) with sand,
B, composition, i.e. furfuryl alcohol resin or furane resins, its addition is the 1.0-2.5% (weight ratio) of moulding (or core) with sand,
C, component III, i.e. the acidic mixture of boracic ion, its addition is the 20-100% of components I and composition sum.
2, resin sand according to claim 1 is characterized in that said aldehydes is formaldehyde, propionic aldehyde.
3, resin sand according to claim 1 is characterized in that the component III is the alcoholic solution of p-methyl benzenesulfonic acid and boric acid, or the mixture of phosphoric acid and boric acid, or the alcoholic solution of sulfuric acid and boric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100399 CN1017316B (en) | 1989-01-21 | 1989-01-21 | Resin sand for foundry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100399 CN1017316B (en) | 1989-01-21 | 1989-01-21 | Resin sand for foundry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1044246A CN1044246A (en) | 1990-08-01 |
| CN1017316B true CN1017316B (en) | 1992-07-08 |
Family
ID=4853843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100399 Expired CN1017316B (en) | 1989-01-21 | 1989-01-21 | Resin sand for foundry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017316B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4663764B2 (en) * | 2008-07-29 | 2011-04-06 | 群栄化学工業株式会社 | Binder composition for mold making and method for producing mold using binder composition for mold making |
| FR2948307B1 (en) * | 2009-07-24 | 2014-07-25 | Huettenes Albertus France | PROCESS FOR OBTAINING A BODY FORMED FROM A GRANULAR MIXTURE |
| CN102898985B (en) * | 2012-08-28 | 2013-12-18 | 石家庄世易糠醛糠醇有限公司 | Preparation method for furan nitrogen-free environment protection casting resin adhesive |
| CN106040965B (en) * | 2016-08-15 | 2017-12-29 | 合肥江淮铸造有限责任公司 | A kind of moulding sand for casting |
| CN107282870B (en) * | 2017-07-11 | 2019-01-11 | 马鞍山市兴隆铸造有限公司 | A kind of preparation method of high intensity furan resin-sand |
| CN110918869B (en) * | 2019-11-14 | 2020-11-20 | 上海金范机械铸造有限公司 | High-temperature-resistant coating for resin sand casting and preparation method thereof |
-
1989
- 1989-01-21 CN CN 89100399 patent/CN1017316B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044246A (en) | 1990-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |