CN109202019A - A kind of moulding process casting double shrouded wheel - Google Patents
A kind of moulding process casting double shrouded wheel Download PDFInfo
- Publication number
- CN109202019A CN109202019A CN201811365511.8A CN201811365511A CN109202019A CN 109202019 A CN109202019 A CN 109202019A CN 201811365511 A CN201811365511 A CN 201811365511A CN 109202019 A CN109202019 A CN 109202019A
- Authority
- CN
- China
- Prior art keywords
- double shrouded
- shrouded wheel
- wax
- casting
- pattern
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention relates to a kind of moulding process for casting double shrouded wheel.Moulding process of the invention, comprises the following steps: type processed surface layer shell processed, is in the milk, backing layer shell processed, dewaxing, roasting, casting, cleaning, heat treatment.Moulding process of the present invention improves casting industry width of flow path in 4mm-15mm, and diameter is greater than the double shrouded wheel Forming Quality of 120mm；Production efficiency is improved, production cost is reduced, pushes the progress of hot investment casting double shrouded wheel production technology and development.
Description
Technical field
The present invention relates to a kind of moulding process for casting double shrouded wheel, belong to casting and forming field.
Background technique
Double shrouded wheel (20mm or more) wider for runner during hot investment casting takes conventional process for making shell (upper to apply
Material, stucco, drying) achieve that normal production.But the double shrouded wheel relatively narrow for channel size, especially width of flow path exist
4mm-15mm, diameter are greater than the double shrouded wheel of 120mm.Due to its runner inner mold chamber it is 2 layers of shell processed very narrow after, coating and sand can not be equal
Even covering runner interior surface, causes investment shell intensity in impeller channel inadequate, phenomena such as impeller artillery fire, bleed-out occurs in casting process
Cause to scrap, production rejection rate is very high.
Summary of the invention
The purpose of the invention is to provide a kind of moulding process for casting double shrouded wheel, hot investment casting for a long time is solved
For industry width of flow path in 4mm-15mm, diameter is more greater than the double shrouded wheel quality problems of 120mm, the problem of production cycle length, with
Just the quality of General Promotion double shrouded wheel improves production efficiency, reduces production cost, and hot investment casting double shrouded wheel is pushed to produce skill
Art progress and development.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of moulding process of casting double shrouded wheel of the invention, specific forming step are as follows:
1) type processed: injecting impeller mold for slack wax, takes out slack wax stripping and slicing after slack wax cooled and solidified, and slack wax is assembled
Cementation is at double shrouded wheel wax-pattern.
2) it surface layer shell processed: is made on double shrouded wheel wax-pattern according to casting Improving Shell Making with Silica Sol (coating, stucco, drying)
Then two layers of surface layer shell is cleaned out and floats sand in runner；
3) it is in the milk: being mixedly configured into powder with silester, alcohol, mullite sand, zirconium English powder；By powder and silester
Hydrolyzate is mixed, until no-powder precipitation, obtains mixed slurry；Mixed slurry is poured into the inner cavity of double shrouded wheel wax-pattern,
The lower end runner mouth of double shrouded wheel wax-pattern encapsulates, and by control double shrouded wheel wax-pattern rotation, institute's grouting material is made to be rapidly filled with stream
Road removes the encapsulation of double shrouded wheel wax-pattern lower end runner mouth after slurry solidification, places 2-3 hours and be fully cured；
Before pouring into mixed slurry to the inner cavity of two layers of surface layer shell, pottery is inserted into the gap of two layers of surface shell of impeller channel
Porcelain stick, the intensity of grouting material to increase.
4) backing layer shell processed: to the impeller wax pattern surface after grouting according to casting Improving Shell Making with Silica Sol (coat, stucco,
It is dry) backing layer shell processed is carried out, until reaching the number of plies and intensity of requirement；
5) it dewaxes: the double shrouded wheel wax-pattern for having made backing layer shell being put into progress high steam dewaxing in dewaxing kettle, after dewaxing
Taking-up obtains double shrouded wheel formwork；
6) it roasts: double shrouded wheel formwork being put into roaster and is roasted, burning while keeping double shrouded wheel formwork sufficiently dry
Remove remaining wax material and its volatile matter；
7) it is poured: the molten steel of smelting being injected in the double shrouded wheel formwork after roasting, obtains double shrouded wheel after cooling
Casting crude product；
Coverture is sprinkled in gate location；Notice that molten steel impact prevents molten steel from directly rushing on cast gate wall in casting process
Hitting at impeller channel causes shell damaged.
8) it clears up: removing the dead head of double shrouded wheel casting crude product, and using pneumatic shake shell machine and hydro-blasting machine to impeller
Shell is cleared up in runner；
9) it is heat-treated: obtaining double shrouded wheel casting finished products after carrying out heat treatment process to the double shrouded wheel after cleaning.
Beneficial effect
Moulding process of the present invention improves casting industry width of flow path in 4mm-15mm, and diameter is greater than the enclosed leaf of 120mm
Wheel shaping quality；Production efficiency is improved, production cost is reduced, pushes the progress of hot investment casting double shrouded wheel production technology and development.
Specific embodiment
The contents of the present invention are further described below with reference to embodiment.
Embodiment
A kind of moulding process of casting double shrouded wheel of the invention, specific forming step are as follows:
1) type processed: injecting impeller mold for slack wax, takes out slack wax stripping and slicing after slack wax cooled and solidified, and slack wax is assembled
Cementation is at double shrouded wheel wax-pattern.
2) it surface layer shell processed: is made on double shrouded wheel wax-pattern according to casting Improving Shell Making with Silica Sol (coating, stucco, drying)
Then two layers of surface layer shell is cleaned out and floats sand in runner；
3) it is in the milk: being mixedly configured into powder with silester, alcohol, mullite sand, zirconium English powder；By powder and silester
Hydrolyzate is mixed, until no-powder precipitation, obtains mixed slurry；Mixed slurry is poured into the inner cavity of double shrouded wheel wax-pattern,
The lower end runner mouth of double shrouded wheel wax-pattern encapsulates, and by control double shrouded wheel wax-pattern rotation, institute's grouting material is made to be rapidly filled with stream
Road removes the encapsulation of double shrouded wheel wax-pattern lower end runner mouth after slurry solidification, places 2-3 hours and be fully cured；
Before pouring into mixed slurry to the inner cavity of double shrouded wheel wax-pattern, it is inserted into the gap of two layers of surface shell of impeller channel
Ceramic rod, the intensity of grouting material to increase.
4) backing layer shell processed: to the impeller wax pattern surface after grouting according to casting Improving Shell Making with Silica Sol (coat, stucco,
It is dry) backing layer shell processed is carried out, until reaching the number of plies and intensity of requirement；
5) it dewaxes: the double shrouded wheel wax-pattern for having made backing layer shell being put into progress high steam dewaxing in dewaxing kettle, after dewaxing
Taking-up obtains double shrouded wheel formwork；
6) it roasts: double shrouded wheel formwork being put into roaster and is roasted, burning while keeping double shrouded wheel formwork sufficiently dry
Remove remaining wax material and its volatile matter；
7) it is poured: the molten steel of smelting being injected in the double shrouded wheel formwork after roasting, obtains double shrouded wheel after cooling
Casting crude product；
Coverture is sprinkled in gate location；Notice that molten steel impact prevents molten steel from directly rushing on cast gate wall in casting process
Hitting at impeller channel causes shell damaged.
8) it clears up: removing the dead head of double shrouded wheel casting crude product, and using pneumatic shake shell machine and hydro-blasting machine to impeller
Shell is cleared up in runner；
9) it is heat-treated: obtaining double shrouded wheel casting finished products after carrying out heat treatment process to the double shrouded wheel after cleaning.
Claims (3)
1. a kind of moulding process for casting double shrouded wheel, it is characterized in that: specific forming step is as follows:
1) type processed: injecting impeller mold for slack wax, takes out slack wax stripping and slicing after slack wax cooled and solidified, and by slack wax assembly cementation
At double shrouded wheel wax-pattern；
2) surface layer shell processed: two layers of surface layer shell is made on double shrouded wheel wax-pattern according to casting Improving Shell Making with Silica Sol, then cleaning is dry
Sand is floated in net flow road；
3) it is in the milk: being mixedly configured into powder with silester, alcohol, mullite sand, zirconium English powder；By powder and silicate hydrolyzate
Liquid is mixed, until no-powder precipitation, obtains mixed slurry；Mixed slurry is poured into the inner cavity of double shrouded wheel wax-pattern, enclosed
The lower end runner mouth of impeller wax-pattern encapsulates, and by control double shrouded wheel wax-pattern rotation, institute's grouting material is made to be rapidly filled with runner, to
The encapsulation for removing double shrouded wheel wax-pattern lower end runner mouth after slurry solidification, places 2-3 hours and is fully cured；
4) backing layer shell processed: to the impeller wax pattern surface after grouting according to casting Improving Shell Making with Silica Sol (coating, stucco, drying)
Carry out backing layer shell processed；
5) it dewaxes: the double shrouded wheel wax-pattern for having made backing layer shell being put into progress high steam dewaxing in dewaxing kettle, is taken out after dewaxing
Obtain double shrouded wheel formwork；
6) it roasts: double shrouded wheel formwork being put into roaster and is roasted；
7) it is poured: the molten steel of smelting being injected in the double shrouded wheel formwork after roasting, obtains double shrouded wheel casting after cooling
Crude product；
8) it clears up: removing the dead head of double shrouded wheel casting crude product, and using pneumatic shake shell machine and hydro-blasting machine to impeller channel
Interior shell is cleared up；
9) it is heat-treated: obtaining double shrouded wheel casting finished products after carrying out heat treatment process to the double shrouded wheel after cleaning.
2. a kind of moulding process for casting double shrouded wheel as described in claim 1, it is characterized in that: to double shrouded wheel wax-pattern
Before inner cavity pours into mixed slurry, ceramic rod is inserted into the gap of two layers of surface shell of impeller channel.
3. a kind of moulding process for casting double shrouded wheel as described in claim 1, it is characterized in that: when casting, in gate location
Sprinkle coverture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365511.8A CN109202019A (en) | 2018-11-16 | 2018-11-16 | A kind of moulding process casting double shrouded wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365511.8A CN109202019A (en) | 2018-11-16 | 2018-11-16 | A kind of moulding process casting double shrouded wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109202019A true CN109202019A (en) | 2019-01-15 |
Family
ID=64994301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811365511.8A Pending CN109202019A (en) | 2018-11-16 | 2018-11-16 | A kind of moulding process casting double shrouded wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109202019A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604523A (en) * | 2019-01-28 | 2019-04-12 | 株洲中航动力精密铸造有限公司 | Preparation method, the preparation method and application of hot investment casting casting of precision casting shell |
| CN109773118A (en) * | 2019-02-27 | 2019-05-21 | 江苏百高新材料科技有限公司 | A kind of coating process of steel casting shell |
| CN110076298A (en) * | 2019-03-15 | 2019-08-02 | 启东市聚旺铸造有限公司 | Shell manufacturing process for casting closed impeller |
| CN110842147A (en) * | 2019-11-29 | 2020-02-28 | 西安航天发动机有限公司 | Method for controlling size of closed impeller investment precision casting runner |
| CN110976772A (en) * | 2019-12-30 | 2020-04-10 | 安徽应流铸业有限公司 | Shell manufacturing method for precisely casting narrow-runner impeller |
| CN111112577A (en) * | 2019-12-31 | 2020-05-08 | 西安西工大超晶科技发展有限责任公司 | Automatic preparation method of C-shaped opening casting formwork |
| CN111168007A (en) * | 2020-01-20 | 2020-05-19 | 江苏中超航宇精铸科技有限公司 | Method for manufacturing formwork with cavity structure |
| CN113606185A (en) * | 2021-08-31 | 2021-11-05 | 东营一诚精密金属有限公司 | Closed impeller structure convenient to investment casting |
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| CN101480697A (en) * | 2008-01-11 | 2009-07-15 | 上海中洲特种合金材料有限公司 | Case-making method of silicasol investment casting with elongated hole structure |
| CN103128230A (en) * | 2013-03-16 | 2013-06-05 | 大连福岛精密零部件有限公司 | Precision manufacturing method of high-accuracy impellor for pump |
| CN104043777A (en) * | 2014-06-30 | 2014-09-17 | 薛铁山 | Investment casting method |
| CN105149555A (en) * | 2015-09-25 | 2015-12-16 | 常德市天伦精密铸造有限公司 | Casting technology for deep hole piece |
| CN108044053A (en) * | 2017-12-04 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of narrow flow road double shrouded wheel fine casting method |
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- 2018-11-16 CN CN201811365511.8A patent/CN109202019A/en active Pending
Patent Citations (5)
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| CN101480697A (en) * | 2008-01-11 | 2009-07-15 | 上海中洲特种合金材料有限公司 | Case-making method of silicasol investment casting with elongated hole structure |
| CN103128230A (en) * | 2013-03-16 | 2013-06-05 | 大连福岛精密零部件有限公司 | Precision manufacturing method of high-accuracy impellor for pump |
| CN104043777A (en) * | 2014-06-30 | 2014-09-17 | 薛铁山 | Investment casting method |
| CN105149555A (en) * | 2015-09-25 | 2015-12-16 | 常德市天伦精密铸造有限公司 | Casting technology for deep hole piece |
| CN108044053A (en) * | 2017-12-04 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of narrow flow road double shrouded wheel fine casting method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604523A (en) * | 2019-01-28 | 2019-04-12 | 株洲中航动力精密铸造有限公司 | Preparation method, the preparation method and application of hot investment casting casting of precision casting shell |
| CN109773118A (en) * | 2019-02-27 | 2019-05-21 | 江苏百高新材料科技有限公司 | A kind of coating process of steel casting shell |
| CN110076298A (en) * | 2019-03-15 | 2019-08-02 | 启东市聚旺铸造有限公司 | Shell manufacturing process for casting closed impeller |
| CN110842147A (en) * | 2019-11-29 | 2020-02-28 | 西安航天发动机有限公司 | Method for controlling size of closed impeller investment precision casting runner |
| CN110842147B (en) * | 2019-11-29 | 2021-03-05 | 西安航天发动机有限公司 | Method for controlling size of closed impeller investment precision casting runner |
| CN110976772A (en) * | 2019-12-30 | 2020-04-10 | 安徽应流铸业有限公司 | Shell manufacturing method for precisely casting narrow-runner impeller |
| CN111112577A (en) * | 2019-12-31 | 2020-05-08 | 西安西工大超晶科技发展有限责任公司 | Automatic preparation method of C-shaped opening casting formwork |
| CN111168007A (en) * | 2020-01-20 | 2020-05-19 | 江苏中超航宇精铸科技有限公司 | Method for manufacturing formwork with cavity structure |
| CN113606185A (en) * | 2021-08-31 | 2021-11-05 | 东营一诚精密金属有限公司 | Closed impeller structure convenient to investment casting |
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Application publication date: 20190115 |