CN102093040A - Composite ceramic mold core for water pump impeller and preparation method thereof - Google Patents
Composite ceramic mold core for water pump impeller and preparation method thereof Download PDFInfo
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- CN102093040A CN102093040A CN2010105771426A CN201010577142A CN102093040A CN 102093040 A CN102093040 A CN 102093040A CN 2010105771426 A CN2010105771426 A CN 2010105771426A CN 201010577142 A CN201010577142 A CN 201010577142A CN 102093040 A CN102093040 A CN 102093040A
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Abstract
The invention particularly relates to a composite ceramic mold core for a water pump impeller and a preparation method thereof, which belong to the technical field of material machining engineering. The composite ceramic mold core is characterized by comprising the following components in part by mass: 12 to 14 parts of silica sol in which the mass percent of SiO2 is 30 percent, 32 to 36 parts of 280 to 400-mesh refractory material powder, 2 to 4 parts of glass fiber chopped strand with the length of between 3 millimeter and 5 millimeters, 15 to 17 parts of antifoaming agent, 1 to 2 parts of breakdown agent and 1 to 2 parts of grain refiner, wherein the breakdown agent in the raw materials is edible glucose powder. The invention has the advantages that: 1) the stability of a coating is stable, and the high-temperature performance of a prepared mold shell is high; 2) casting defects such as sand holding and the like can be effectively avoided in an impeller casting process; 3) the preparation and service performance of the composite ceramic mold core can be effectively enhanced; 4) a manufacturing process of the mold core is easy, and is convenient to operate; and 5) the high-temperature performance of the mold core is high. After being baked, the composite ceramic mold core has the characteristic of water solubility, and can be removed by water.
Description
Technical field
The invention belongs to the Materials Processing Engineering technical field, be specifically related to a kind of water pump impeller composite ceramic core and method for making thereof.
Background technology
Water pump impeller is important part in mechanical water pump, and its inner complex construction is all cast out by placing core in casting mold.The core of using when in the past making water pump impeller is resin sand or oil-sand material, though its making processes is uncomplicated, but the core of making is because room temperature and hot strength are all lower, defectives such as crackle and fracture appear easily, yield rate is not high, and, cause the surface smoothness of core not high, so the surface smoothness of the impeller casting that obtains and dimensional precision are not high yet because the sand fineness of using is higher.
Summary of the invention
The purpose of this invention is to provide a kind of technology simple, be convenient to operation, the high water pump impeller of core smooth finish and dimensional precision is with composite ceramic core and method for making thereof.
The present invention is achieved by the following technical solution:
Be a kind of water pump impeller composite ceramic core, it is characterized in that each component shared mass fraction in composite ceramic core is:
SiO
2Massfraction is 12～14 parts of 30% silicon sol;
32～36 parts in 280 orders～400 purpose refractory materials powders;
Length is 2～4 parts of the fiberglas chopped strands of 3～5mm;
15～17 parts of defoamers;
Defeated and dispersed dose 1～2 part;
1～2 part of grain-refining agent;
Defeated and dispersed dose in the above-mentioned raw materials is the table grapes Icing Sugar.
The refractory materials powder is fused corundom and lime carbonate, and both portion rates are fused corundom: lime carbonate=1: 0.1～1.
Defoamer is any in silicone antifoam agent, n-Octanol and the butyl glycol ether phosphoric acid ester.
Grain-refining agent is any in Leyden blue and oxide compound, iron aluminate could and oxide compound thereof, nickel aluminate and oxide compound thereof and silicate and the oxide compound thereof.
A kind of water pump impeller is characterized in that comprising the steps: with the manufacture method of composite ceramic core
1. adopt 12～14 parts of SiO
2Massfraction is 30% the silicon sol binding agent as composite ceramic core coating, 280 orders～400 purpose refractory materials the powders that adopt 32～36 parts are as the basic material of composite ceramic core coating, the fiberglas chopped strand that is 3～5mm that adds 2～4 parts of length again, 15～17 parts defoamer, 1～2 part defeated and dispersed dose, 1～2 portion grain-refining agent make the coating of composite ceramic core;
2. adopt dry hardened gelation, step for coat, stucco, drying, so repeat repeatedly to obtain the core of desired thickness;
3. roasting: maturing temperature is 950～1050 ℃, and the time is 0.5～1 hour.
The shell that roasting is good should be white or rose look, and the composite ceramic core after roasting has water miscible characteristics, and used water is removed.
The present invention compared with prior art has following advantage:
1) adopt the binding agent of silicon sol as composite ceramic core, silicon sol is easy to use, easily is made into the high-quality coating of high powder liquor ratio, and paint stability is good, but the manufacture craft of lightener core, and made shell high-temperature behavior is good;
2) adopt the basic material of the refractory materials powder of high refractoriness, can effectively avoid in the impeller castingprocesses, occurring casting flaws such as sticking sand as composite ceramic core coremaking;
3) in the prescription of composite ceramic core, add compositions such as glass chopped silk, defoamer, defeated and dispersed dose and grain-refining agent, can effectively improve the preparation and the use properties of composite ceramic core;
4) preparation process of composite ceramic core adopts dry hardened gelation, step for coat, stucco, drying.So repeat repeatedly to make that to obtain the core of desired thickness the manufacturing process of core is fairly simple, be convenient to operation;
5) roasting process of composite ceramic core adopts under 950～1050 ℃ of temperature, and 0.5～1 hour sinter process of roasting can obtain the good composite ceramic core of high-temperature behavior.Composite ceramic core after roasting has water miscible characteristics, and used water is removed.
Embodiment
Below be to make the concrete operations step of water pump impeller with composite ceramic core:
Embodiment 1
1) adopts 12 parts of silicon sol (ω (SiO
2=30%/Kg)) as the binding agent of composite ceramic core coating, adopt the refractory materials powder (fused corundom: of 32 part of 280 high refractoriness of purpose lime carbonate=1: 0.1) as the basic material of composite ceramic core coating, the length that adds 2 parts of low alkali again is 3～5mm fiberglas chopped strand, 15 parts of defoamers (as ZF-100 type silicone antifoam agent), 1 part defeated and dispersed dose (table grapes Icing Sugar) and 1 portion of grain-refining agent (Leyden blue and oxide compound thereof), with above each component homodisperse, mixing and wetting fully mutually, adopt the low speed continuous mixer to stir coating, through continual stirring in 24 hours, the coating that makes composite ceramic core was coated usefulness during for manufacturing mold core.
2) in the preparation process of composite ceramic core, adopt dry hardened gelation.At first utilize core mold, the coating of composite ceramic core is evenly spread upon the surface of core mold, stucco then (composition of sand is fused corundom and lime carbonate, and both proportionings are identical with both proportionings in the coating), dry again.So repeat repeatedly can obtain the core of desired thickness.
3) need step through roasting after the composite ceramic core drying, its roasting process adopts 950～1050 ℃ of maturing temperatures, grills thoroughly for making core, should be incubated 0.5～1 hour after reaching temperature.The shell that roasting is good should be white or rose look, and the composite ceramic core after roasting has water miscible characteristics, and used water is removed.
Embodiment 2
1) adopts 13 parts of silicon sol (ω (SiO
2=30%/Kg)) as the binding agent of composite ceramic core coating, adopt the refractory materials powder (fused corundom: of 34 part of 340 high refractoriness of purpose lime carbonate=1: 0.5) as the basic material of composite ceramic core coating, the length that adds 3 parts of low alkali again is 3～5mm fiberglas chopped strand, 16 parts of defoamers (n-Octanol), 1.5 portion defeated and dispersed dose of (table grapes Icing Sugar) and 1.5 portions of grain-refining agents (iron aluminate could and oxide compound thereof), with above each component homodisperse, mixing and wetting fully mutually, adopt the low speed continuous mixer to stir coating, through continual stirring in 24 hours, the coating that makes composite ceramic core was coated usefulness during for manufacturing mold core.
2) in the preparation process of composite ceramic core, adopt dry hardened gelation.At first utilize core mold, the coating of composite ceramic core is evenly spread upon the surface of core mold, stucco then (composition of sand is fused corundom and lime carbonate, and both proportionings are identical with both proportionings in the coating), dry again.So repeat repeatedly can obtain the core of desired thickness.
3) need step through roasting after the composite ceramic core drying, its roasting process adopts 950～1050 ℃ of maturing temperatures, grills thoroughly for making core, should be incubated 0.5～1 hour after reaching temperature.The shell that roasting is good should be white or rose look, and the composite ceramic core after roasting has water miscible characteristics, and used water is removed.
Embodiment 3
1) adopts 14 parts of silicon sol (ω (SiO
2=30%/Kg)) as the binding agent of composite ceramic core coating, adopt the refractory materials powder (fused corundom: of 36 part of 400 high refractoriness of purpose lime carbonate=1: 1) as the basic material of composite ceramic core coating, the length that adds 4 parts of low alkali again is 3～5mm fiberglas chopped strand, 17 parts of defoamers (defoamer GP (butyl glycol ether phosphoric acid ester)), 2 parts defeated and dispersed dose (table grapes Icing Sugar) and 2 portions of grain-refining agents (nickel aluminate and oxide compound thereof), with above each component homodisperse, mixing and wetting fully mutually, adopt the low speed continuous mixer to stir coating, through continual stirring in 24 hours, the coating that makes composite ceramic core was coated usefulness during for manufacturing mold core.
2) in the preparation process of composite ceramic core, adopt dry hardened gelation.At first utilize core mold, the coating of composite ceramic core is evenly spread upon the surface of core mold, stucco then (composition of sand is fused corundom and lime carbonate, and both proportionings are identical with both proportionings in the coating), dry again.So repeat repeatedly can obtain the core of desired thickness.
3) need step through roasting after the composite ceramic core drying, its roasting process adopts 950～1050 ℃ of maturing temperatures, grills thoroughly for making core, should be incubated 0.5～1 hour after reaching temperature.The shell that roasting is good should be white or rose look, and the composite ceramic core after roasting has water miscible characteristics, and used water is removed.
More than among 3 embodiment the coating density and the dope viscosity value apportion of using silica-sol wash as follows:
The viscosity of the density of listed coating and coating increases along with the increase of each component portion rate in the above form, illustrates that the present invention can adjust the portion rate of coating flexibly at different use occasions.
Claims (5)
1. water pump impeller composite ceramic core is characterized in that each component shared mass fraction in composite ceramic core is:
SiO
2Massfraction is 12～14 parts of 30% silicon sol;
32～36 parts in 280 orders～400 purpose refractory materials powders;
Length is 2～4 parts of the fiberglas chopped strands of 3～5mm;
15～17 parts of defoamers;
Defeated and dispersed dose 1～2 part;
1～2 part of grain-refining agent;
Defeated and dispersed dose in the above-mentioned raw materials is the table grapes Icing Sugar.
2. water pump impeller composite ceramic core according to claim 1 is characterized in that the refractory materials powder is fused corundom and lime carbonate, and both portion rates are fused corundom: lime carbonate=1: 0.1～1.
3. water pump impeller composite ceramic core according to claim 1 is characterized in that defoamer is any in silicone antifoam agent, n-Octanol and the butyl glycol ether phosphoric acid ester.
4. water pump impeller composite ceramic core according to claim 1 is characterized in that grain-refining agent is any in Leyden blue and oxide compound, iron aluminate could and oxide compound thereof, nickel aluminate and oxide compound thereof and silicate and the oxide compound thereof.
5. the manufacture method of a water pump impeller usefulness composite ceramic core is characterized in that comprising the steps:
1. adopt 12～14 parts of SiO
2Massfraction is 30% the silicon sol binding agent as composite ceramic core coating, 280 orders～400 purpose refractory materials the powders that adopt 32～36 parts are as the basic material of composite ceramic core coating, the fiberglas chopped strand that is 3～5mm that adds 2～4 parts of length again, 15～17 parts defoamer, 1～2 part defeated and dispersed dose, 1～2 portion grain-refining agent make the coating of composite ceramic core;
2. adopt dry hardened gelation, step for coat, stucco, drying, so repeat repeatedly to obtain the core of desired thickness;
3. roasting: maturing temperature is 950～1050 ℃, and the time is 0.5～1 hour.
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Cited By (17)
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| CN102659392A (en) * | 2012-04-24 | 2012-09-12 | 中国铝业股份有限公司 | Preparation method of calcined alumina powder for black ceramics |
| CN102873276A (en) * | 2012-10-24 | 2013-01-16 | 山东理工大学 | Technology for producing casting core |
| CN103056303A (en) * | 2011-12-13 | 2013-04-24 | 丹阳市精密合金厂有限公司 | Ceramic core for supporting plate forming |
| CN103056302A (en) * | 2011-12-13 | 2013-04-24 | 丹阳市精密合金厂有限公司 | Ceramic core for molding aeroengine case type annular casting hollow support plate |
| CN103073319A (en) * | 2011-12-13 | 2013-05-01 | 丹阳市精密合金厂有限公司 | Alumina-based ceramic core for support plate forming |
| CN103073272A (en) * | 2011-12-13 | 2013-05-01 | 丹阳市精密合金厂有限公司 | Production method of ceramic core for support plate forming |
| CN103231021A (en) * | 2011-12-13 | 2013-08-07 | 丹阳市精密合金厂有限公司 | Alumina-based ceramic core and preparation method thereof |
| CN103286273A (en) * | 2011-12-13 | 2013-09-11 | 丹阳市精密合金厂有限公司 | Making method of ceramic core for molding of casing annular casting hollow support plate |
| CN105964936A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | Wood pulp fiber-enhanced water-soluble mold core and preparation method thereof |
| CN105964893A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | Bagasse pulp-containing water-soluble mold core and preparation method thereof |
| CN106116533A (en) * | 2016-06-23 | 2016-11-16 | 上海交通大学 | The preparation method of high-porosity alumina base ceramic core |
| CN107042309A (en) * | 2017-03-07 | 2017-08-15 | 长沙理工大学 | A kind of water-soluble core part and preparation method thereof |
| CN110871259A (en) * | 2018-08-29 | 2020-03-10 | 中国科学院金属研究所 | Preparation method and application of aluminum activated ceramic surface layer slurry |
| CN110871257A (en) * | 2018-08-29 | 2020-03-10 | 中国科学院金属研究所 | Preparation method and application of graphite activated ceramic surface layer slurry |
| CN112207234A (en) * | 2020-10-14 | 2021-01-12 | 鹰普航空科技有限公司 | Precise casting process of complex high-temperature alloy nozzle ring |
| CN115677327A (en) * | 2022-10-26 | 2023-02-03 | 中国地质大学（武汉） | Water-soluble calcium oxide-based supporting mold core for internal flow passage member and preparation method thereof |
| CN117383947A (en) * | 2023-09-19 | 2024-01-12 | 东风精密铸造有限公司 | Self-hardening core material without heating and preparation method thereof |
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| CN103056302A (en) * | 2011-12-13 | 2013-04-24 | 丹阳市精密合金厂有限公司 | Ceramic core for molding aeroengine case type annular casting hollow support plate |
| CN103073319A (en) * | 2011-12-13 | 2013-05-01 | 丹阳市精密合金厂有限公司 | Alumina-based ceramic core for support plate forming |
| CN103073272A (en) * | 2011-12-13 | 2013-05-01 | 丹阳市精密合金厂有限公司 | Production method of ceramic core for support plate forming |
| CN103231021A (en) * | 2011-12-13 | 2013-08-07 | 丹阳市精密合金厂有限公司 | Alumina-based ceramic core and preparation method thereof |
| CN103286273A (en) * | 2011-12-13 | 2013-09-11 | 丹阳市精密合金厂有限公司 | Making method of ceramic core for molding of casing annular casting hollow support plate |
| CN103073272B (en) * | 2011-12-13 | 2014-03-05 | 丹阳市精密合金厂有限公司 | Production method of ceramic core for support plate forming |
| CN103231021B (en) * | 2011-12-13 | 2015-06-17 | 江苏图南合金股份有限公司 | Alumina-based ceramic core and preparation method thereof |
| CN102659392A (en) * | 2012-04-24 | 2012-09-12 | 中国铝业股份有限公司 | Preparation method of calcined alumina powder for black ceramics |
| CN102873276A (en) * | 2012-10-24 | 2013-01-16 | 山东理工大学 | Technology for producing casting core |
| CN105964936A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | Wood pulp fiber-enhanced water-soluble mold core and preparation method thereof |
| CN105964893A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | Bagasse pulp-containing water-soluble mold core and preparation method thereof |
| CN106116533A (en) * | 2016-06-23 | 2016-11-16 | 上海交通大学 | The preparation method of high-porosity alumina base ceramic core |
| CN107042309A (en) * | 2017-03-07 | 2017-08-15 | 长沙理工大学 | A kind of water-soluble core part and preparation method thereof |
| CN107042309B (en) * | 2017-03-07 | 2019-12-20 | 长沙理工大学 | Water-soluble mold core part and preparation method thereof |
| CN110871259A (en) * | 2018-08-29 | 2020-03-10 | 中国科学院金属研究所 | Preparation method and application of aluminum activated ceramic surface layer slurry |
| CN110871257A (en) * | 2018-08-29 | 2020-03-10 | 中国科学院金属研究所 | Preparation method and application of graphite activated ceramic surface layer slurry |
| CN110871259B (en) * | 2018-08-29 | 2021-03-26 | 中国科学院金属研究所 | Preparation method and application of aluminum activated ceramic surface layer slurry |
| CN110871257B (en) * | 2018-08-29 | 2021-03-26 | 中国科学院金属研究所 | Preparation method and application of graphite activated ceramic surface layer slurry |
| CN112207234A (en) * | 2020-10-14 | 2021-01-12 | 鹰普航空科技有限公司 | Precise casting process of complex high-temperature alloy nozzle ring |
| CN115677327A (en) * | 2022-10-26 | 2023-02-03 | 中国地质大学（武汉） | Water-soluble calcium oxide-based supporting mold core for internal flow passage member and preparation method thereof |
| CN117383947A (en) * | 2023-09-19 | 2024-01-12 | 东风精密铸造有限公司 | Self-hardening core material without heating and preparation method thereof |
| CN117383947B (en) * | 2023-09-19 | 2024-07-30 | 东风精密铸造有限公司 | Self-hardening core material without heating and preparation method thereof |
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Application publication date: 20110615 |