CN104550665A - Coating for special casting processes - Google Patents
Coating for special casting processes Download PDFInfo
- Publication number
- CN104550665A CN104550665A CN201310489403.2A CN201310489403A CN104550665A CN 104550665 A CN104550665 A CN 104550665A CN 201310489403 A CN201310489403 A CN 201310489403A CN 104550665 A CN104550665 A CN 104550665A
- Authority
- CN
- China
- Prior art keywords
- casting
- powder
- coating
- special
- barium sulfate
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a coating for special casting processes, and aims to solve the problems that a domestic approved product in the field of the technology is absent, the import and export products are high in cost and the like. Calcium carbonate powder is taken as a base material and mixed with sodium silicate powder and barium sulfate and/or china clay powder to form the coating, wherein the weight ratio of the sodium silicate powder, the barium sulfate and the china clay powder is (50-70): (35-25): (15-5), and the particle size is 600-1,000 meshes. The powder materials meeting requirements for components, content, particle size and the like are mixed proportionally and stirred uniformly to obtain the coating. The coating for the special casting processes has the advantages as follows: the raw materials are easy to obtain, the cost is low, the manufacture is easy, the use is convenient, the effect is good, the roughness of the casting surface can be reduced, the casting product quality can be improved, further, the service life of a casting mold can be prolonged, and non-casting time is shortened. The coating can be widely applied to the special casting processes such as gravity casting, low-pressure casting, differential pressure casting and the like of aluminum alloys, zinc alloys and the like.
Description
Technical field
The invention belongs to casting technology field, be specifically related to a kind of coating for special casting.
Background technology
At present, in the Special Processes of Metal Castings technique of aluminium or kirsite, the technologies such as such as gravity casting, low-pressure casting, pressure reduction casting, for the coating of metal mold cavity and casting tool surface spraying, domestic traditional product mainly adopts the pulvis such as zinc oxide, chalk powder, graphite powder to be raw material, adds waterglass and water carries out scene modulation according to different proportion, after stirring, spraying uses, facts have proved, the open defect of this technology has: the preparation coating operations that is in harmonious proportion bothers, and expends time in; Raw material cost is high, affects product benefit; Due to conventional vacuum poor performance, therefore during use, need frequent heating die cavity and spraying, and easily cause the sticky burning of die cavity; The surface quality of continuous castings produced is not good enough.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, provide a kind of coating for special casting, it for raw material, can not only reduce manufacturing cost with the natural resources of abundant cheapness, and easy to use, and can improve result of use.。
Coating for special casting provided by the invention, the component of this coating and the weight ratio of each component are: calcium carbonate powder, sodium metasilicate powder, barium sulfate are or/and the weight ratio of china clay in powder powder three is 50 ~ 70:35 ~ 25:15 ~ 5, and granularity is 600 ~ 1000 orders.
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 ~ 75, Na
2o 30 ~ 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, by the satisfactory various powders such as composition, content, granularity mixing and stirring and get final product in proportion.
Coating for special casting provided by the invention, its beneficial effect is:
1. raw material is easy to get, and cost is low.Wherein, the calcium carbonate powder as base-material can by natural crystal pulverising mill systems such as calcite, lime stone, dolomites; China clay in powder powder can be prepared by natural crystals such as illites, and the powder such as sodium metasilicate, barium sulfate is the chemical industry preparation about natural ore;
2. nontoxic pollution-free, easy to use;
3. the effect of the aspect such as fire-resistant, viscose glue, plasticising is significantly collaborative;
4. improve venting quality and the flow velocity of casting liquid, reduce the roughness of cast(ing) surface.
Detailed description of the invention
Below in conjunction with an embodiment, coating for special casting provided by the invention is described in detail.
Embodiment
The coating for special casting of the present embodiment, getting granularity is 600 ~ 1000 orders, and chemical component weight degree is respectively: containing CaCO
3the calcium carbonate powder of 70 ~ 98, containing SiO
270 ~ 75, Na
2the sodium metasilicate powder of O 30 ~ 25, containing BaSO
4the barium sulfate powder of > 90, by above-mentioned three kinds of powders in stirring after the percentage by weight ratio mixing of 50:35:15 and obtaining this coating.
Claims (1)
1. a coating for special casting, it is characterized in that: the component of this coating and the weight ratio of each component are: calcium carbonate powder, sodium metasilicate powder, barium sulfate are or/and the weight ratio of china clay in powder powder three is 50 ~ 70:35 ~ 25:15 ~ 5, and granularity is 600 ~ 1000 orders; The chemical component weight degree of above-mentioned calcium carbonate powder is: CaCO
370 ~ 98; The chemical component weight degree of sodium metasilicate powder is: SiO
270 ~ 75, Na
2o 30 ~ 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310489403.2A CN104550665A (en) | 2013-10-18 | 2013-10-18 | Coating for special casting processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310489403.2A CN104550665A (en) | 2013-10-18 | 2013-10-18 | Coating for special casting processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550665A true CN104550665A (en) | 2015-04-29 |
Family
ID=53068329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310489403.2A Pending CN104550665A (en) | 2013-10-18 | 2013-10-18 | Coating for special casting processes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104550665A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110732632A (en) * | 2019-11-08 | 2020-01-31 | 徐州丰华金属材料有限公司 | Preparation method of novel zinc alloy coatings |
| CN113784809A (en) * | 2019-04-16 | 2021-12-10 | Ask化学品股份有限公司 | Coating composition, method for coating a casting mould, use of a coating composition for coating a casting mould and a casting mould |
-
2013
- 2013-10-18 CN CN201310489403.2A patent/CN104550665A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113784809A (en) * | 2019-04-16 | 2021-12-10 | Ask化学品股份有限公司 | Coating composition, method for coating a casting mould, use of a coating composition for coating a casting mould and a casting mould |
| CN110732632A (en) * | 2019-11-08 | 2020-01-31 | 徐州丰华金属材料有限公司 | Preparation method of novel zinc alloy coatings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |