CN1179806C - Coating for special casting - Google Patents
Coating for special casting Download PDFInfo
- Publication number
- CN1179806C CN1179806C CNB021592802A CN02159280A CN1179806C CN 1179806 C CN1179806 C CN 1179806C CN B021592802 A CNB021592802 A CN B021592802A CN 02159280 A CN02159280 A CN 02159280A CN 1179806 C CN1179806 C CN 1179806C
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- CN
- China
- Prior art keywords
- powder
- casting
- calcium carbonate
- paint
- fine materials
- 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 - Fee Related
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention discloses paint for nonconventional casting, which is invented for aiming at the problems that no home-made approved product exists in the technical field currently, imported products have an expensive price, etc. The present invention is characterized in that the paint is made by mixing calcium carbonate powder, sodium silicate fine materials and barium sulfate or / and china clay powder fine materials, wherein the calcium carbonate powder is used as base materials; the weight ratio of the calcium carbonate powder to the sodium silicate fine materials to the barium sulfate or / and to china clay powder fine materials is 50 to 70 to 35 to 25 to 15 to 5, and the granularity is 600 to 1000 meshes. After various fine materials with satisfactory ingredients, a satisfactory content, satisfactory granularity, etc. are proportionally mixed and evenly stirred, the paint is obtained. The present invention has the advantages of easy obtainment of raw materials, low cost, easy fabrication, convenient use and good effect; the present invention not only can reduce the roughness of the surface of a cast product and improve the product quality of the cast product but also can extend the service life of a casting mold and shortens non-casting time. The paint can be widely used for nonconventional casting technology, such as the gravity casting, the low pressure casting, the pressure difference casting, etc. of alloy, such as aluminium alloy, zinc alloy, etc.
Description
Technical field: the present invention relates to a kind of aluminium or kirsite Special Processes of Metal Castings coating.
Background technology: at present, in the Special Processes of Metal Castings technology of aluminium or kirsite, technologies such as for example gravity-assist pouring, low-pressure casting, pressure reduction cast, the coating that is used for metal mold cavity and cast instrument surface spraying, domestic traditional product mainly is that pulvis such as employing zinc oxide, whiting, graphite powder are raw material, add waterglass and water by different proportion and carry out the scene modulation, spraying use through stirring after.Facts have proved that the open defect of this technology has: 1. be in harmonious proportion and prepare the coating troublesome poeration, expend time in, 2. raw material cost height influences the product benefit; 3. because the traditional raw material heat-insulating property is poor, thus need frequent heating die cavity and spraying when using, and easily cause the sticking burning of die cavity; 4. the surface quality of continuous castings of Sheng Chaning is not good enough.In recent years from Japanese import a kind of code name be the finished product coating of DAG395, brings and can use, but price is higher.
Summary of the invention:
The objective of the invention is, at above-mentioned defective, provide a kind of Special Processes of Metal Castings coating, it is a raw material with abundant cheap natural resources, can not only reduce manufacturing cost, and easy to use, and can improve result of use.
Technical solution of the present invention is: a kind of Special Processes of Metal Castings coating, comprise the calcium carbonate powder, it is characterized in that it also contains sodium metasilicate powder and barium sulfate or/and the china clay in powder powder, wherein calcium carbonate powder, sodium metasilicate powder, barium sulfate are or/and china clay in powder powder three's weight ratio is 50-70: 35-25: 15-5, and granularity is the 600-1000 order.
The chemical component weight degree of aforesaid calcium carbonate powder is: CaCO
370-98; The chemical component weight degree of sodium metasilicate powder is: SiO
270-ZZZZZZZZZZ75, Na
2O30-25; The chemical component weight degree of barium sulfate powder is: BaSO
4〉=90, the chemical component weight degree of china clay in powder powder is: SiO
2≤ 80, Na
2O≤0.30.
The preparation method of this coating is very simple, stirs promptly after satisfactory various powders such as composition, content, granularity are mixed in proportion.
Compared with prior art, coating provided by the invention has the following advantages:
(1) raw material is easy to get, and cost is low.Wherein, can be as the calcium carbonate powder of base-material by natural crystal pulverising mill systems such as calcite, lime stone, dolomites; The china clay in powder powder can be prepared by natural crystals such as illites.Powder such as sodium metasilicate, barium sulfate is the chemical industry preparation in relevant natural ore deposit.
(2) nontoxic pollution-free, easy to use.Stablize because of main component is natural materials mixing back chemical property, be difficult for reaction generation harmful substance, so human and environment is not all had harm; Directly get final product stirring evenly in its input suitable quantity of water during use, saving trouble saves time.
(3) because product structure is reasonable, the effect of aspects such as it is fire-resistant, viscose glue, plasticising is significantly collaborative, thus make the spraying back long to the die cavity temperature retention time, and be difficult for bonding, thus prolong the service life of casting mold and shortened the non-duration of pouring.
Facts have proved that (4) this product can improve the venting quality and the flow velocity of casting liquid, reduce the roughness of cast(ing) surface, can make Ra reach 3.2-12.5, be beneficial to and improve the quality of products.
The specific embodiment:
Below in conjunction with embodiment the present invention is elaborated.
Embodiment 1, and getting granularity is the 6000-1000 order, and the chemical component weight degree is respectively: contain CaCO
3The calcium carbonate powder of 70-98 contains SiO
270-75, Na
2The sodium metasilicate powder of O30-25 contains BaSO
4〉=90 barium sulfate powder stirs after above-mentioned three kinds of powders are mixed in 50: 35: 15 percentage by weight ratio and promptly gets this coating.
Embodiment 2, get and precedent granularity, composition, calcium carbonate and sodium metasilicate powder that content is identical, and it is identical to get granularity again, and content is SiO
2≤ 80, Na
2The china clay in powder powder of O≤0.30 stirs after three kinds of powders are mixed in 70: 25: 5 percentage by weight ratio and promptly gets this coating.
Embodiment 3, get and preceding two routine granularities, composition, calcium carbonate and sodium metasilicate powder that content is identical, and it is identical to get granularity again, and content is BaSO
4〉=90 barium sulfate powder and content are SiO
2≤ 80, Na
2The powder that the china clay in powder powder of O≤0.30 mixes mutually stirs after this three parts powder mixed in 60: 30: 10 percentage by weight ratio and promptly gets this coating.
Coating provided by the invention is applicable to Special Processes of Metal Castings technologies such as gravity-assist pouring, low-pressure casting, the pressure reduction cast notes of alloys such as aluminium, zinc.
Claims (4)
1, a kind of Special Processes of Metal Castings coating comprises the calcium carbonate powder, it is characterized in that it also contains sodium metasilicate powder and barium sulfate or/and the china clay in powder powder.Wherein calcium carbonate powder, sodium metasilicate powder, barium sulfate are or/and china clay in powder powder three's weight ratio is 50-70: 35-25: 15-5, and granularity is the 600-1000 order.
2,, it is characterized in that the chemical component weight degree of calcium carbonate powder is: CaCO according to the Special Processes of Metal Castings coating of claim 1
370-98.
3,, it is characterized in that the chemical component weight degree of sodium metasilicate powder is: SiO according to the Special Processes of Metal Castings coating of claim 1 or 2
270-75, Na
2O30-25.
4,, it is characterized in that the chemical component weight degree of barium sulfate powder is: BaSO according to the Special Processes of Metal Castings coating of claim 3
4〉=90; The chemical component weight degree of china clay in powder powder is: SiO
2≤ 80, Na
2O≤0.30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021592802A CN1179806C (en) | 2002-12-30 | 2002-12-30 | Coating for special casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021592802A CN1179806C (en) | 2002-12-30 | 2002-12-30 | Coating for special casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1424157A CN1424157A (en) | 2003-06-18 |
| CN1179806C true CN1179806C (en) | 2004-12-15 |
Family
ID=4753281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021592802A Expired - Fee Related CN1179806C (en) | 2002-12-30 | 2002-12-30 | Coating for special casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1179806C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773406B (en) * | 2012-07-26 | 2015-05-27 | 汉川市石金科技有限公司 | Refractory aggregate of casting coating recycled from old shell powder through investment casting |
| CN103143673B (en) * | 2013-03-29 | 2015-07-08 | 上海坤孚企业(集团)有限公司 | Coating for magnesium alloy metal mold casting as well as preparation method and applications thereof |
| CN105537507A (en) * | 2015-12-07 | 2016-05-04 | 禹州市神运机械有限公司 | Paint for aluminum alloy casting and use method thereof |
| CN108555230A (en) * | 2018-01-04 | 2018-09-21 | 汉中锌业有限责任公司 | A kind of preparation method of the zinc ingot metal ingot mold coating of zinc hydrometallurgy |
-
2002
- 2002-12-30 CN CNB021592802A patent/CN1179806C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1424157A (en) | 2003-06-18 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
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