CN110919818A - Low-temperature forming method for semi-solid slurry for producing casting head system - Google Patents
Low-temperature forming method for semi-solid slurry for producing casting head system Download PDFInfo
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- CN110919818A CN110919818A CN201911199253.5A CN201911199253A CN110919818A CN 110919818 A CN110919818 A CN 110919818A CN 201911199253 A CN201911199253 A CN 201911199253A CN 110919818 A CN110919818 A CN 110919818A
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- 238000005266 casting Methods 0.000 title claims abstract description 57
- 239000002002 slurry Substances 0.000 title claims abstract description 34
- 239000007787 solid Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000003607 modifier Substances 0.000 claims abstract description 8
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052863 mullite Inorganic materials 0.000 claims description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000002910 solid waste Substances 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000004576 sand Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000001723 curing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013035 low temperature curing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/54—Producing shaped prefabricated articles from the material specially adapted for producing articles from molten material, e.g. slag refractory ceramic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to a low-temperature forming method of semi-solid slurry for producing a casting cap workpiece, which comprises the following steps: s1: preparing refractory powder, and taking the obtained refractory powder as a base material; s2: sequentially adding a binder and a powder surface active modifier in a preset ratio into the base material obtained in the step S1 to obtain a mixture; s3: fully stirring and uniformly mixing the mixture, and preparing semi-solid slurry with preset viscosity; s4: carrying out bubble removal and fine mixing on the semi-solid slurry by a vacuum degassing pug mill; s5: injecting or injecting the finely mixed semi-solid slurry into a cavity of a special-shaped die, and manufacturing a casting cap workpiece base mold by using the die; s6: and curing and forming the obtained casting cap workpiece base mold for a preset time to form a casting cap workpiece. The cast casting cap workpiece has higher quality.
Description
Technical Field
The invention relates to a molding process technology, in particular to a low-temperature molding method of semi-solid slurry for producing a casting head system.
Background
During the metal casting process, the body of the cast part, due to the process requirements, contains, in addition to the shape and dimensions of the workpiece itself, some "excess" structural parts, which are commonly referred to as the casting heads. The casting cap workpiece is a workpiece which is obtained by casting and comprises a structure of a riser, a pouring cup, a pouring gate and the like. Pouring cup: and the molten metal enters the inlet of the cavity part of the casting from the gating system. And (4) riser: a supplementary part specially provided for feeding. In the casting production, as molten metal, such as high-temperature molten iron, produces sand holes and falls sand due to the permanent scouring of a sand mold pouring system, the casting cap workpiece under the existing process conditions causes poor quality of castings.
Disclosure of Invention
In order to at least partially solve at least one problem in the existing forming production process, the invention provides the following technical scheme:
a low-temperature forming method of semi-solid slurry for producing casting caps comprises the following steps:
s1: preparing refractory powder, and taking the obtained refractory powder as a base material;
s2: sequentially adding a binder and a powder surface active modifier in a preset ratio into the base material obtained in the step S1 to obtain a mixture;
s3: fully stirring and uniformly mixing the mixture, and preparing semi-solid slurry with preset viscosity;
s4: carrying out bubble removal and fine mixing on the semi-solid slurry by a vacuum degassing pug mill;
s5: injecting or injecting the finely mixed semi-solid slurry into a cavity of a special-shaped die, and manufacturing a casting cap workpiece base mold by using the die;
s6: and curing and forming the obtained casting cap workpiece base mold for a preset time to form a casting cap workpiece.
Further, in step S1, the refractory powder is one or a mixture of at least two of silicon carbide powder, zirconia powder, mullite powder and alumina powder.
Further, in step S1, the refractory powder is casting industry solid waste powder.
Further, in step S2, the binder is an organic resin or an inorganic binder.
Further, in step S2, the powder surface active modifier is a high-purity silane coupling agent.
Further, in step S6, the heating temperature during the curing and molding is 0 to 150 ℃, and the heating time is 0 to 30 minutes.
The semi-solid slurry low-temperature forming method provided by the invention has the following technical effects:
1. the method has all application functions and effects of the ceramic casting head system;
2. the forming is flexible and quick, the low-temperature curing forming or the natural curing forming can be realized, and the quality of the cast-top workpiece is higher;
3. the cost is low, the price is substantial, and cost reduction and efficiency improvement can be realized for various casting enterprises;
4. the energy consumption is low, no dust and no odor exist, the production process is close to zero emission, and the method is economical and environment-friendly;
5. the strength is high, the high-temperature resistant molten metal is durable in scouring, does not crack and does not drop slag, and the casting mold can be quickly customized and used for casting various ferrous and nonferrous metal products;
6. the production process is simple and controllable, the production line can be built and arranged in a line, the automation degree is high, and the period is fast.
Drawings
Fig. 1 is a flow chart of a specific embodiment of a method for low-temperature forming of semi-solid slurry according to the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In the casting production, the semi-solid slurry low-temperature forming method provided by the invention is adopted to carry out casting production on casting capping workpieces (workpieces containing a riser, a sprue cup and a pouring gate), has the characteristics of smooth circulation, various high-temperature metal liquid scouring resistance, no absorption, good saw property and the like, can be used for randomly connecting straight pipes, elbows and tee joints of the casting capping workpieces by using an adhesive tape or a positioning table, is simple to operate and convenient to use, has a simplified molding process, saves the difficult work of coating on the inner side of the sprue, improves the design of a casting system, avoids the defects of sand washing, sand holes and sand inclusion of castings, plays a great role in improving the quality and yield of the castings, and particularly has more remarkable advantages in the molding of various self-hardening sand processes. The product has high density, greatly reduces the secondary oxidation of the pouring metal liquid in the pouring process, and reduces the inclusion entering the casting body. High fire resistance, smooth surfaces of horizontal, straight and inner pouring channels after pouring, and no corrosion during pouring. Good chemical stability and no chemical reaction with the molten metal of the casting at high temperature. High thermal strength and good thermoplasticity, can effectively prevent sand washing and sand inclusion, and reduce the sand hole defect of the casting. The thermal expansion coefficient is low, the contraction influence on the casting is small, and the pulling crack phenomenon caused by a gating system is reduced. The surface is fine and smooth, the resistance of the pouring gate is small, and the flow rate is high. The casting heat influence caused by the thermal stress generated inside the casting due to various resistances of a pouring system, a casting mould, a sand core and the casting structure can be effectively reduced.
Example 1
Specifically, referring to fig. 1, fig. 1 is a flow chart of an embodiment of low-temperature forming of a semi-solid slurry according to the present invention.
In one embodiment, the invention provides a method for low-temperature forming of semi-solid slurry for producing a casting cap workpiece, which comprises the following steps:
s1: preparing refractory powder, and taking the obtained refractory powder as a base material; specifically, the refractory powder material may be one or a mixture of at least two of silicon carbide powder, zirconia powder, mullite powder and alumina powder, and the refractory powder material may also be solid waste powder material in the casting industry. Generally speaking, the low-temperature forming method of semi-solid slurry provided by the invention extracts the industrial solid waste powder of the casting enterprise according to the requirements of the used products, adds professional materials such as a certain proportion of a binder, a powder surface active modifier and the like, sequentially adds special mixing and grinding equipment for fully stirring and uniformly mixing until the semi-solid slurry (commonly called mud) meeting the use requirement of viscosity is obtained, removes bubbles and finely mixes the mud through a special vacuum degassing pugging machine, then adds a special charging barrel for injection or injection molding under certain pressure,
s2: sequentially adding a binder and a powder surface active modifier in a preset proportion into the base material to obtain a mixture; wherein the binder is organic resin or inorganic binder, and the powder surface active modifier is high-purity silane coupling agent.
S3: adding the mixture into special mixing and grinding equipment, such as a double-helix conical mixer, a horizontal ribbon mixer and the like, fully stirring and uniformly mixing, and preparing into semi-solid slurry with preset viscosity;
s4: carrying out bubble removal and fine mixing on the semi-solid slurry by a vacuum degassing pug mill;
s5: injecting or injecting the finely mixed semi-solid slurry into a cavity of a die, and manufacturing a casting cap workpiece base mold by using the die; if the special-shaped parts such as risers, pouring cups, tee joints and the like need die sinking and injection molding, if the special-shaped parts are straight pipes or square pipes, the special-shaped parts are directly extruded and molded, and then the special-shaped parts are quickly cut according to the requirement of the use length.
S6: and heating or naturally and quickly curing and forming the obtained casting cap workpiece base mold for a preset time to form a casting cap workpiece, wherein the heating temperature during curing and forming is 0-150 ℃, and the heating time is 0-30 minutes. Finally, the method is used for casting production.
Example 2
The casting head system for producing the stainless steel valve body steel casting is produced by applying the semi-solid slurry low-temperature forming method provided by the invention. According to the requirements of casting workpiece products, the refractory powder material is selected from mullite powder and alumina powder, and the binder is selected from Bonney inorganic binder, namely 'an acid curing binder and a preparation method thereof' (patent number ZL201210139991.2), and relates to the binder. Firstly, preparing mullite powder and alumina powder, then adding a Bangni inorganic adhesive and a high-purity silane coupling agent into the mullite powder and the alumina powder, wherein the mixture ratio is as follows: 90 percent of mullite powder and alumina powder, 7 percent of water and 3 percent of adhesive. The materials are added into a double-helix conical mixer to be fully stirred and uniformly mixed, and the materials are mixed to be pug which meets the use requirement of viscosity, namely paste pug. The pug is subjected to bubble removal and fine mixing through a special vacuum degassing pug mill, and then is filled into a special charging barrel to be injected or injected under the pressure of 10 MPA. The parts of the riser, the sprue cup, the tee joint and the like are special-shaped or straight-barrel-shaped parts.
According to the requirements of casting workpiece products, extracting industrial solid waste powder of a casting enterprise as refractory powder, adding professional materials such as organic resin and high-purity silane coupling agent into the solid waste powder, adding a double-helix conical mixer in sequence to fully stir and mix the materials uniformly until the mixture is muddy and meets the use requirement of viscosity, removing bubbles and finely mixing the muddy materials through a special vacuum degassing pug mill, and then filling a special charging barrel to perform injection or injection molding under certain pressure. If the special-shaped parts such as a riser, a pouring cup, a tee joint and the like need to be molded by die sinking and injection,
in the above embodiment, the method for forming a semi-solid slurry at a low temperature provided by the invention has the following technical effects:
1. the casting method has all application functions and effects of a ceramic pouring system, and the cast cap workpiece has high quality;
2. the forming is flexible and quick, and the low-temperature curing forming or natural curing forming can be realized;
3. the cost is low, the price is substantial, and cost reduction and efficiency improvement can be realized for various casting enterprises;
4. the energy consumption is low, no dust and no odor exist, the production process is close to zero emission, and the method is economical and environment-friendly;
5. the strength is high, the high-temperature resistant molten metal is durable in scouring, does not crack or drop slag, and can be quickly customized and used for pouring various ferrous and nonferrous metal products;
6. the production process is simple and controllable, the production line can be built and arranged in a line, the automation degree is high, and the period is fast.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A low-temperature forming method of semi-solid slurry for producing a casting head system is characterized by comprising the following steps:
s1: preparing refractory powder, and taking the obtained refractory powder as a base material;
s2: sequentially adding a binder and a powder surface active modifier in a preset ratio into the base material obtained in the step S1 to obtain a mixture;
s3: fully stirring and uniformly mixing the mixture, and preparing semi-solid slurry with preset viscosity;
s4: carrying out bubble removal and fine mixing on the semi-solid slurry by a vacuum degassing pug mill;
s5: injecting or injecting the finely mixed semi-solid slurry into a cavity of a special-shaped die, and manufacturing a casting cap workpiece base mold by using the die;
s6: and curing and forming the obtained casting cap workpiece base mold for a preset time to form a casting cap workpiece.
2. The method for low-temperature forming of semi-solid slurry according to claim 1, wherein in step S1, the refractory powder is one or a mixture of at least two of silicon carbide powder, zirconia powder, mullite powder and alumina powder.
3. The method for low-temperature forming of semi-solid slurry according to claim 1, wherein the refractory powder is foundry industry solid waste powder in step S1.
4. The method for low-temperature forming of semi-solid slurry according to claim 1, wherein the binder is an organic resin or an inorganic binder at step S2.
5. The method for low-temperature forming of semi-solid slurry according to claim 1, wherein in step S2, the powder surface active modifier is a high-purity silane coupling agent.
6. The method for low-temperature forming of semi-solid slurry according to claim 1, wherein the heating temperature for the solidification forming is 0-150 ℃ and the heating time is 0-30 minutes in step S6.
7. The method of low temperature forming of semi-solid slurry according to claim 1, wherein the riser part comprises a riser, a tundish and a runner.
8. The method for low-temperature forming of semi-solid slurry according to claim 1, wherein the riser, the pouring cup and the pouring gate are connected by an adhesive tape or a positioning table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199253.5A CN110919818A (en) | 2019-11-29 | 2019-11-29 | Low-temperature forming method for semi-solid slurry for producing casting head system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911199253.5A CN110919818A (en) | 2019-11-29 | 2019-11-29 | Low-temperature forming method for semi-solid slurry for producing casting head system |
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| CN201911199253.5A Pending CN110919818A (en) | 2019-11-29 | 2019-11-29 | Low-temperature forming method for semi-solid slurry for producing casting head system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147181A (en) * | 2021-10-21 | 2022-03-08 | 浙江林家昌隆阀门铸造有限公司 | Double-furnace casting method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2950527A1 (en) * | 1979-12-15 | 1981-06-19 | Eduard Dr.-Ing. 5253 Lindlar Baur | Blind riser for foundry moulds - with outer sheath made of foamed polymer, which burns during casting and thus provides thermal insulation surrounding metal in riser |
| CN1121328A (en) * | 1993-04-22 | 1996-04-24 | 福塞科国际有限公司 | A mould and a method for the casting of metals and refractory compositions for use therein |
| CN102271836A (en) * | 2008-11-20 | 2011-12-07 | 亚世科化学补缩系统有限公司 | Molding material mixture and riser for casting aluminum |
| CN102921884A (en) * | 2012-10-24 | 2013-02-13 | 山东理工大学 | Ceramic-type precision casting technology |
| CN104368761A (en) * | 2014-11-18 | 2015-02-25 | 贵州安吉航空精密铸造有限责任公司 | Heating and thermal insulation riser sleeve |
| CN105414486A (en) * | 2016-01-12 | 2016-03-23 | 哈尔滨理工大学 | Exothermic heat-preservation riser material for cast magnesium alloy and preparation method |
| CN108015235A (en) * | 2018-01-12 | 2018-05-11 | 刘思彤 | A kind of insulating and heating riser |
| CN110467419A (en) * | 2019-08-06 | 2019-11-19 | 王海江 | A kind of semi solid slurry forming method based on land plaster |
-
2019
- 2019-11-29 CN CN201911199253.5A patent/CN110919818A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2950527A1 (en) * | 1979-12-15 | 1981-06-19 | Eduard Dr.-Ing. 5253 Lindlar Baur | Blind riser for foundry moulds - with outer sheath made of foamed polymer, which burns during casting and thus provides thermal insulation surrounding metal in riser |
| CN1121328A (en) * | 1993-04-22 | 1996-04-24 | 福塞科国际有限公司 | A mould and a method for the casting of metals and refractory compositions for use therein |
| CN102271836A (en) * | 2008-11-20 | 2011-12-07 | 亚世科化学补缩系统有限公司 | Molding material mixture and riser for casting aluminum |
| CN102921884A (en) * | 2012-10-24 | 2013-02-13 | 山东理工大学 | Ceramic-type precision casting technology |
| CN104368761A (en) * | 2014-11-18 | 2015-02-25 | 贵州安吉航空精密铸造有限责任公司 | Heating and thermal insulation riser sleeve |
| CN105414486A (en) * | 2016-01-12 | 2016-03-23 | 哈尔滨理工大学 | Exothermic heat-preservation riser material for cast magnesium alloy and preparation method |
| CN108015235A (en) * | 2018-01-12 | 2018-05-11 | 刘思彤 | A kind of insulating and heating riser |
| CN110467419A (en) * | 2019-08-06 | 2019-11-19 | 王海江 | A kind of semi solid slurry forming method based on land plaster |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147181A (en) * | 2021-10-21 | 2022-03-08 | 浙江林家昌隆阀门铸造有限公司 | Double-furnace casting method |
| CN114147181B (en) * | 2021-10-21 | 2023-12-29 | 浙江林家昌隆阀门铸造有限公司 | Double-furnace casting method |
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Application publication date: 20200327 |