CN106001388A - High-temperature-resistant coated sand for casting instruments - Google Patents
High-temperature-resistant coated sand for casting instruments Download PDFInfo
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- CN106001388A CN106001388A CN201610608883.3A CN201610608883A CN106001388A CN 106001388 A CN106001388 A CN 106001388A CN 201610608883 A CN201610608883 A CN 201610608883A CN 106001388 A CN106001388 A CN 106001388A
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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
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- Chemical & Material Sciences (AREA)
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- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to high-temperature-resistant coated sand for casting instruments. The high-temperature-resistant coated sand comprises the following raw materials in parts by weight: 1-2 parts of molybdenum phenolic resin, 0.02-0.06 part of a coupling agent, 0.2-0.5 part of urotropin, 0.2-0.5 part of a curing agent, 0.5-1 part of alkali-free glass fiber, 0.2-0.5 part of zinc stearate, 1-3 parts of high-alumina bauxite, 5-10 parts of pulverized corundum and 85-95 parts of refired magnesia. Compared with conventional coated sand, besides the performance of the conventional coated sand, the high-temperature-resistant coated sand further has the performance of delaying the raising rate and inhibiting the production of nitrogen, and nitrogen holes formed in castings can be effectively reduced, so that the yield of the casting instruments is increased; and the coated sand meets the universality from iron castings to steel castings, the yield of the castings is increased, and the cost of molding materials of a casting enterprise is saved. The high-temperature-resistant coated sand has excellent high-temperature-resistant casting performance.
Description
Technical field
The present invention relates to casting technology field, be specifically related to the precoated sand of a kind of instrument casting with resistance to elevated temperatures.
Background technology
Precoated sand is molding sand or the core sand that sand grain surface is i.e. covered with one layer of hard resin film before moulding.The preparation of precoated sand has cold process and two kinds of coating techniques of Re Fa: resin is dissolved by cold process ethanol, and adds hexamethylenamine during mulling, makes the two be coated on sand grain surface, and ethanol volatilizees, and obtains precoated sand；Full-boiled process is that sand is preheating to uniform temperature, adds resin and makes it melt, and stirring makes resin-coating at sand grain surface, adds hexamethylenamine aqueous solution and lubricant, cools down, crushes, sieves to obtain precoated sand.The precoated sand of casting is mainly used in steel-casting, ironcasting.
Along with the continuous extension of precoated sand range of application, different casting techniques, unlike material require and the foundry goods of different structure proposes different performance requirements to precoated sand.Higher to the requirement of precoated sand performance for the precoated sand of instrument casting, existing precoated sand is when doing instrument casting and using, it is difficult to meet the requirement of actual casting serviceability.
Summary of the invention
Not enough for prior art, the invention provides a kind of precoated sand for instrument casting with excellent resistance to elevated temperatures.
The present invention solves the technical scheme of above-mentioned technical problem employing: the heat resisting film-coating sand of a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 1 ~ 2 part, coupling agent 0.02 ~ 0.06 part, hexamethylenamine 0.2 ~ 0.5 part, 0.2 ~ 0.5 part of firming agent, alkali-free glass fibre 0.5 ~ 1 part, zinc stearate 0.2 ~ 0.5 part, alumine 1 ~ 3 part, emergy 5 ~ 10 parts, 85 ~ 95 parts of reheating magnesia.
Further, the heat resisting film-coating sand of described a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 1.5 parts, coupling agent 0.04 part, hexamethylenamine 0.4 part, 0.3 part of firming agent, alkali-free glass fibre 0.7 part, zinc stearate 0.4 part, alumine 2 parts, emergy 8 parts, 90 parts of reheating magnesia.
Further, the heat resisting film-coating sand of described a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 1 part, coupling agent 0.02 part, hexamethylenamine 0.2 part, 0.2 part of firming agent, alkali-free glass fibre 0.5 part, zinc stearate 0.2 part, alumine 1 part, emergy 5 parts, 85 parts of reheating magnesia.
Further, the heat resisting film-coating sand of described a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 2 parts, coupling agent 0.06 part, hexamethylenamine 0.5 part, 0.5 part of firming agent, alkali-free glass fibre 1 part, zinc stearate 0.5 part, alumine 3 parts, emergy 10 parts, 95 parts of reheating magnesia.
Compared with prior art, the present invention possesses advantage and is:
The heat resisting film-coating sand of a kind of instrument casting that the present invention provides, compare with conventional precoated sand, this precoated sand is in addition to having the performance of Conventional coverlay film sand, also there is the performance delaying raising rate, suppression nitrogen to produce, can effectively reduce foundry goods and produce nitrogen pore, and then improve the yield rate of casting apparatus；Add precoated sand and meet the ironcasting universality to steel-casting, improve the yield rate of foundry goods, save the cost of foundry enterprise Modeling Material, there is excellent high temperature resistant casting character.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1: the heat resisting film-coating sand of a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 1.5 parts, coupling agent 0.04 part, hexamethylenamine 0.4 part, 0.3 part of firming agent, alkali-free glass fibre 0.7 part, zinc stearate 0.4 part, alumine 2 parts, emergy 8 parts, 90 parts of reheating magnesia.
Embodiment 2: the heat resisting film-coating sand of a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 1 part, coupling agent 0.02 part, hexamethylenamine 0.2 part, 0.2 part of firming agent, alkali-free glass fibre 0.5 part, zinc stearate 0.2 part, alumine 1 part, emergy 5 parts, 85 parts of reheating magnesia.
Embodiment 3: the heat resisting film-coating sand of a kind of instrument casting, including the raw material of following parts by weight: Mo-phenolic resin 2 parts, coupling agent 0.06 part, hexamethylenamine 0.5 part, 0.5 part of firming agent, alkali-free glass fibre 1 part, zinc stearate 0.5 part, alumine 3 parts, emergy 10 parts, 95 parts of reheating magnesia.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvement and modification, these improve and modify and also should be regarded as protection scope of the present invention.
Claims (4)
1. the heat resisting film-coating sand of instrument casting, it is characterised in that: include the raw material of following parts by weight: Mo-phenolic resin 1 ~ 2 part, coupling agent 0.02 ~ 0.06 part, hexamethylenamine 0.2 ~ 0.5 part, 0.2 ~ 0.5 part of firming agent, alkali-free glass fibre 0.5 ~ 1 part, zinc stearate 0.2 ~ 0.5 part, alumine 1 ~ 3 part, emergy 5 ~ 10 parts, 85 ~ 95 parts of reheating magnesia.
The heat resisting film-coating sand of a kind of instrument the most according to claim 1 casting, it is characterized in that, including the raw material of following parts by weight: Mo-phenolic resin 1.5 parts, coupling agent 0.04 part, hexamethylenamine 0.4 part, 0.3 part of firming agent, alkali-free glass fibre 0.7 part, zinc stearate 0.4 part, alumine 2 parts, emergy 8 parts, 90 parts of reheating magnesia.
The heat resisting film-coating sand of a kind of instrument the most according to claim 1 casting, it is characterized in that, including the raw material of following parts by weight: Mo-phenolic resin 1 part, coupling agent 0.02 part, hexamethylenamine 0.2 part, 0.2 part of firming agent, alkali-free glass fibre 0.5 part, zinc stearate 0.2 part, alumine 1 part, emergy 5 parts, 85 parts of reheating magnesia.
The heat resisting film-coating sand of a kind of instrument the most according to claim 1 casting, it is characterized in that, including the raw material of following parts by weight: Mo-phenolic resin 2 parts, coupling agent 0.06 part, hexamethylenamine 0.5 part, 0.5 part of firming agent, alkali-free glass fibre 1 part, zinc stearate 0.5 part, alumine 3 parts, emergy 10 parts, 95 parts of reheating magnesia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608883.3A CN106001388A (en) | 2016-07-29 | 2016-07-29 | High-temperature-resistant coated sand for casting instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608883.3A CN106001388A (en) | 2016-07-29 | 2016-07-29 | High-temperature-resistant coated sand for casting instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106001388A true CN106001388A (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610608883.3A Pending CN106001388A (en) | 2016-07-29 | 2016-07-29 | High-temperature-resistant coated sand for casting instruments |
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| CN (1) | CN106001388A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274626A (en) * | 2000-06-13 | 2000-11-29 | 秦升益 | Preparation process of heat resisting film-coating sand |
| CN101927318A (en) * | 2010-09-03 | 2010-12-29 | 吴江市液铸液压件铸造有限公司 | High strength precoated sand |
| CN103231010A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | Easy-collapsibility type precoated sand |
| CN103231007A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | Moisture absorption resistance iron cast precoated sand |
| CN104550631A (en) * | 2013-10-21 | 2015-04-29 | 青岛五洋铸机有限公司 | Composite special casting sand for replacing chromite sand |
| CN104588569A (en) * | 2014-12-29 | 2015-05-06 | 北京仁创科技集团有限公司 | Fast-curing type high-temperature resistant binder and pre-coated sand thereof |
-
2016
- 2016-07-29 CN CN201610608883.3A patent/CN106001388A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274626A (en) * | 2000-06-13 | 2000-11-29 | 秦升益 | Preparation process of heat resisting film-coating sand |
| CN101927318A (en) * | 2010-09-03 | 2010-12-29 | 吴江市液铸液压件铸造有限公司 | High strength precoated sand |
| CN103231010A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | Easy-collapsibility type precoated sand |
| CN103231007A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | Moisture absorption resistance iron cast precoated sand |
| CN104550631A (en) * | 2013-10-21 | 2015-04-29 | 青岛五洋铸机有限公司 | Composite special casting sand for replacing chromite sand |
| CN104588569A (en) * | 2014-12-29 | 2015-05-06 | 北京仁创科技集团有限公司 | Fast-curing type high-temperature resistant binder and pre-coated sand thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |