CN103252444A - Hot-box method-based core sand preparation process for core preparation - Google Patents
Hot-box method-based core sand preparation process for core preparation Download PDFInfo
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- CN103252444A CN103252444A CN2013101462249A CN201310146224A CN103252444A CN 103252444 A CN103252444 A CN 103252444A CN 2013101462249 A CN2013101462249 A CN 2013101462249A CN 201310146224 A CN201310146224 A CN 201310146224A CN 103252444 A CN103252444 A CN 103252444A
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- sand
- core
- quartz sand
- chromite
- thermosetting resin
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Abstract
The invention discloses a hot-box method-based core sand preparation process for core preparation. The core sand preparation process comprises the following steps of: (a), mixing quartz sand with chromite sand, wherein the chromite sand accounts for 4 to 6wt% of the quartz sand; and (b), mixing the quartz sand with the chromite sand for 50 to 80s to obtain crude sand, adding a catalyst into the crude sand, mixing the catalyst with the crude sand for 100 to 120s, adding thermosetting resin, mixing for 150 to 180s, and then preparing sand, wherein the catalyst accounts for 0.1 to 0.5wt% of the quartz sand, and the thermosetting resin accounts for 1.5 to 2wt% of the quartz sand. The catalyst comprises the following components by weight percent of 10 to 15wt% of ammonium chloride, 40 to 45wt% of urea and 35 to 45wt% of water. The thermosetting resin comprises the following components by weight percent of 90 to 95wt% of an adhesive, 2 to 3.5wt% of a reinforcing agent and 1.5 to 2.5wt% of a peroxide initiator. When the prepared core sand is used for core preparation based on a hot-box method, the defects caused by deformation, shrinkage and cracking of a sand core can be overcome. Meanwhile, the using strength of the prepared core sand meets requirements within two weeks, the using period of the core sand is prolonged, and the strength of a casting is enhanced.
Description
Technical field
The present invention relates to casting field, relate in particular to a kind of core sand preparing process, specifically be applicable to the core sand preparing process of thermal core casing core manufacturing coremaking.
Background technology
Core sand be in the Foundry Production for the manufacture of the material of core, generally mixed according to certain ratio by Modeling Materials such as casting model powder, core sand bonding agent and additives.Core is mainly used to form inner chamber, hole and the pit portion of foundry goods, when cast, its major part or part surface are surrounded by liquid metal, the heat effect, the mechanism that stand iron liquid are all stronger, exhaust conditions is also poor, shake out, clear up difficulty, so core sand should have outside the performance of general molding sand, also require to have higher intensity, gas permeability, yielding row and collapsibility.
The inconsistent situation of different parts thickness of foundry goods is run into by regular meeting in the castings production; processing mode at this situation is to put into chill in the thicker place of foundry goods at present; be used for accelerating the cooling velocity of foundry goods part; thereby make that foundry goods integral body is complete; this way centering; heavy castings can play good effect; but for small-sized and complicated foundry goods; the size of chill and weight are bad to be determined; if it is overweight; then the heat of Xi Shouing is many; the heat of casting liquid can reach and makes chill arrive fusion temperature; lack of fusion will occur, though kick the beam chill is melted fully, can not reach enough interior cold effects; cause the foundry goods easy deformation; shrinkage cavity; cracking, problems such as insufficient strength.
Summary of the invention
The problem that the present invention solves is to provide a kind of molding sand preparing process based on thermal core casing core manufacturing, is intended to reduce the bad and raising intensity that foundry goods causes because of distortion, shrinkage cavity, cracking.
In order to address the above problem, technical scheme of the present invention is:
A kind of core sand preparing process based on thermal core casing core manufacturing is characterized in that, may further comprise the steps:
A) quartz sand and chromite sand are mixed, the mass percent that wherein said chromite sand accounts for described quartz sand is 4-6%;
B) obtain roughing sand behind quartz sand and the chromite sand mixing 50-80s, in roughing sand, add catalyst mix 100-120s, shake out after adding thermosetting resin mixing 150-180s again, described catalyst addition is the 0.1-0.5% of quartz sand quality, and the addition of described thermosetting resin resin is the 1.5-2% of quartz sand quality;
The constituent of described catalyst and part by weight thereof are: 10-15 ammonium chloride, and 40-45 urea, 35-45 water, the constituent of described thermosetting resin and weight portion ratio thereof are: 90-95 bonding agent, 2-3.5 reinforcing agent, 1.2-2.5 peroxide initiator.
Preferably, described reinforcing agent is a kind of in vinyl silanes reinforcing agent, resin reinforcing agent, the silane coupler.
Preferably, SiO in the described quartz sand
2Content more than or equal to 98%.
Preferably, the mixed angle-shaped strip number of quartz sand and sieve iron ore is smaller or equal to 30.
Preferably, to account for the mass percent of described quartz sand be 4.5-5% to described chromite sand.
Preferably, the constituent of described catalyst and be by weight proportion: 14 ammonium chlorides, 42 urea, 44 water.
Preferably, the constituent of described thermosetting resin and weight portion ratio thereof are: 95 bonding agents, 3 reinforcing agents, 2 peroxide initiators.
Compared with prior art, beneficial effect of the present invention is:
1, a kind of core sand preparing process based on thermal core casing core manufacturing provided by the invention:
A) quartz sand and chromite sand are mixed, the mass percent that wherein said chromite sand accounts for described quartz sand is 4-6%.
B) obtain roughing sand behind quartz sand and the chromite sand mixing 50-80s, in roughing sand, add catalyst mix 100-120s, shake out after adding thermosetting resin mixing 150-180s again, described catalyst addition is the 0.1-0.5% of quartz sand quality, and the addition of described thermosetting resin resin is the 1.5-2% of quartz sand quality.The ferrochrome mineral sand that certain mass is arranged in the roughing sand, ferrochrome mineral sand is the sharp crystal sand based on chromite, it is chill material, the character that can substitute chill is arranged, the chill material ferrochrome mineral sand that directly adds the certain mass ratio in the core sand of coremaking can obviously reduce bad problems such as the foundry goods easy deformation determining because the size of chill and position are bad to cause, cracking.Therefore the present invention can reduce foundry goods because of easy deformation, cracking cause bad.
2. because the present invention is a kind of based on the reinforcing agent that certain ingredients is arranged in the thermosetting resin in the core sand preparing process of thermal core casing core manufacturing, be the vinyl silanes reinforcing agent as preferred reinforcing agent of the present invention, constituent and the weight portion ratio thereof of thermosetting resin are in addition: the 90-95 bonding agent, 2-3.5 reinforcing agent, 1.5-2.5 peroxide initiator, mix according to this ratio, make the core sand of preparing in two weeks, use the intensity that still has.Therefore the present invention can improve the intensity of core sand, and then has improved the intensity of foundry goods.
The specific embodiment
Below in conjunction with the specific embodiment invention is described in further detail
A kind of core sand preparing process based on thermal core casing core manufacturing, its special feature is, may further comprise the steps:
A) quartz sand and chromite sand are mixed, the mass percent that wherein said chromite sand accounts for described quartz sand is 4-6%;
B) obtain roughing sand behind quartz sand and the chromite sand mixing 50-80s, in roughing sand, add catalyst mix 100-120s, shake out after adding thermosetting resin mixing 150-180s again, described catalyst addition is the 0.1-0.5% of quartz sand quality, and the addition of described thermosetting resin resin is the 1.5-2% of quartz sand quality;
Constituent and the part by weight thereof of preferred catalyst are: 10-15 ammonium chloride, 40-45 urea, 35-45 water.
Constituent and the weight portion ratio thereof of preferred thermosetting resin are: 90-95 bonding agent, 2-3.5 reinforcing agent, 1.5-2.5 peroxide initiator.
Preferred reinforcing agent is a kind of in vinyl silanes reinforcing agent, resin reinforcing agent, the silane coupler.
SiO in the preferred quartz sand
2Content more than or equal to 98%.
Preferred quartz sand and the mixed angle-shaped strip number of sieve iron ore are smaller or equal to 30.
The mass percent that preferred chromite sand accounts for described quartz sand is 4.5-5%.
Constituent and the part by weight thereof of preferred catalyst are: 14 ammonium chlorides, 42 urea, 44 water.
Constituent and the weight portion ratio thereof of preferred thermosetting resin are: 95 bonding agents, 3 reinforcing agents, 2 peroxide initiators.
Embodiment:
A kind of core sand preparing process based on thermal core casing core manufacturing: get SiO
2Content is that 98% quartz sand and chromite sand just mix 50-80s and obtain roughing sand in puddle mixer, the angle-shaped strip number of roughing sand is smaller or equal to 30, wherein to account for the mass ratio of quartz sand be 4-6% to chromite sand, the present embodiment preferred proportion is 4.5-5%, the catalyst mix 100-120s that in quartz sand, adds the 0.1-0.5% that accounts for the quartz sand total amount, shake out after adding the thermosetting resin mixing 150-180s of the 1.5-2% account for the quartz sand total amount afterwards again, also just obtain the core sand for thermal core casing core manufacturing coremaking of the present invention.
Wherein catalyst is to be mixed and made into according to certain ratio by ammonium chloride, urea, water, as the optimal catalyst composition proportion of present embodiment is: 14 ammonium chlorides, 42 urea, 44 water; Thermosetting resin be by bonding agent, reinforcing agent, peroxide initiator in being mixed and made in certain ratio, as the optimal catalyst composition proportion of present embodiment be: 95 bonding agents, 3 reinforcing agents, 2 peroxide initiators.
This shows, can not only reduce foundry goods because of easy deformation, cracking cause bad, can also improve the intensity of foundry goods, and the shelf-life of intensity brought up to for two weeks.
The above only is preferred embodiments of the present invention; protection scope of the present invention is not limited with above-mentioned embodiment; any those skilled in the art of being familiar with according to disclosed content do etc. little modification or variation, all should include in the protection domain of record of claims.
Claims (7)
1. the core sand preparing process based on thermal core casing core manufacturing is characterized in that, may further comprise the steps:
A) quartz sand and chromite sand are mixed, the mass percent that wherein said chromite sand accounts for described quartz sand is 4-6%;
B) quartz sand and chromite sand mixing 50-80s obtain roughing sand, in roughing sand, add catalyst mix 100-120s, shake out after adding thermosetting resin mixing 150-180s again, described catalyst addition is the 0.1-0.5% of quartz sand quality, and the addition of described thermosetting resin resin is the 1.5-2% of quartz sand quality;
The constituent of described catalyst and part by weight thereof are: 10-15 ammonium chloride, and 40-45 urea, 35-45 water, the constituent of described thermosetting resin and weight portion ratio thereof are: 90-95 bonding agent, 2-3.5 reinforcing agent, 1.5-2.5 peroxide initiator.
2. a kind of core sand preparing process based on thermal core casing core manufacturing according to claim 1 is characterized in that, described reinforcing agent is a kind of in vinyl silanes reinforcing agent, resin reinforcing agent, the silane coupler.
3. a kind of core sand preparing process based on thermal core casing core manufacturing according to claim 1 is characterized in that SiO in the described quartz sand
2Content more than or equal to 98%.
4. a kind of core sand preparing process based on thermal core casing core manufacturing according to claim 3 is characterized in that, the mixed angle-shaped strip number of quartz sand and chromite sand is smaller or equal to 30.
5. a kind of core sand preparing process based on thermal core casing core manufacturing according to claim 1 is characterized in that, the mass percent that described chromite sand accounts for described quartz sand is 4.5-5%.
6. a kind of core sand preparing process based on thermal core casing core manufacturing according to claim 1 is characterized in that, the constituent of described catalyst and be by weight proportion: 14 ammonium chlorides, 42 urea, 44 water.
7. a kind of core sand preparing process based on thermal core casing core manufacturing according to claim 1 is characterized in that the constituent of described thermosetting resin and weight portion ratio thereof are: 95 bonding agents, 3 reinforcing agents, 2 peroxide initiators.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310146224.9A CN103252444B (en) | 2013-04-25 | 2013-04-25 | A kind of core sand preparing process based on thermal core casing core manufacturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310146224.9A CN103252444B (en) | 2013-04-25 | 2013-04-25 | A kind of core sand preparing process based on thermal core casing core manufacturing |
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| CN103252444A true CN103252444A (en) | 2013-08-21 |
| CN103252444B CN103252444B (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495695A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | Chilled mud-core molding sand manufactured from chromite sand and method for manufacturing chilled mud-core molding sand |
| CN105964907A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Hot-core box precoated sand casting technology of motor end cover |
| CN108262440A (en) * | 2018-04-11 | 2018-07-10 | 苏州勤堡精密机械有限公司 | The mixture core sand of high heat-resistant high-strength low bulk |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440431A (en) * | 2000-05-08 | 2003-09-03 | 通用电气公司 | Thermosetting resins and laminates |
| CN101780520A (en) * | 2010-01-13 | 2010-07-21 | 中信重工机械股份有限公司 | Method for alternatively mixing resin chromite sand and resin quartz sand |
-
2013
- 2013-04-25 CN CN201310146224.9A patent/CN103252444B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440431A (en) * | 2000-05-08 | 2003-09-03 | 通用电气公司 | Thermosetting resins and laminates |
| CN101780520A (en) * | 2010-01-13 | 2010-07-21 | 中信重工机械股份有限公司 | Method for alternatively mixing resin chromite sand and resin quartz sand |
Non-Patent Citations (3)
| Title |
|---|
| 佚名: "树脂砂造型工艺", 《电工材料》 * |
| 张俊德等: "冷芯盒工艺的现状与发展前景", 《现代铸铁》 * |
| 徐庆柏等: "低成本复合砂在V法造型中的应用", 《铸造》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495695A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | Chilled mud-core molding sand manufactured from chromite sand and method for manufacturing chilled mud-core molding sand |
| CN105964907A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Hot-core box precoated sand casting technology of motor end cover |
| CN108262440A (en) * | 2018-04-11 | 2018-07-10 | 苏州勤堡精密机械有限公司 | The mixture core sand of high heat-resistant high-strength low bulk |
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| Publication number | Publication date |
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| CN103252444B (en) | 2015-12-09 |
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