CN102000774B - Precision casting hot and hard compound shell making process - Google Patents
Precision casting hot and hard compound shell making process Download PDFInfo
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- CN102000774B CN102000774B CN201010507237A CN201010507237A CN102000774B CN 102000774 B CN102000774 B CN 102000774B CN 201010507237 A CN201010507237 A CN 201010507237A CN 201010507237 A CN201010507237 A CN 201010507237A CN 102000774 B CN102000774 B CN 102000774B
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Abstract
The invention discloses a precision casting hot and hard compound shell making process, which is implemented by the following steps in turn: firstly, making 4 to 5 layers of thin shells by using silica solution according to a precision casting shell making process; secondly, placing the thin shells on a flat steel plate with an opening, wherein the thin shells are placed at a position above the opening on the flat steel plate; thirdly, covering the outside of the thin shells with the sand box and placing the sand box on the flat sheet plate; fourthly, filling coating sand into the sand box; and finally, introducing air into the thin shells from the opening of the flat steel plate, allowing the coating sand close to the surface of the thin shells to be hardened to form a coating sand hardened layer, stopping heating after the thickness of the coating sand thin shell reaches 5 to 10mm, removing the sand box and the coating sand which is not hardened and obtaining the molded shell. The precision casting hot and hard compound shell making process reduces labor intensity, shortens a production period, reduces material consumption, eliminates waste chemical liquid and improves the quality and stability of castings.
Description
Technical field:
The present invention relates generally to the hot investment casting field, relates in particular to a kind of hot investment casting cold process and the hard multiple process for making shell of heat.
Background technology:
The system shell side method of existing silica sol precision casting spare is: preceding 2-5 layer adopts silicon sol casing, and back-up coat adopts waterglass chemicosolidifying process for making shell.Total number of plies of shell is decided according to module weight.Casting pouring weight is the medium-and-large-sized foundry goods of 150-500kg, and its shell number of plies is the 10-15 layer.Waterglass chemicosolidifying system shell consumption refractory material and aluminium chloride are many, and labour intensity is big, and the production cycle is long, and the aluminium chloride acid waste liquid pollutes the environment, and the casting quality influence factor is many.
Summary of the invention:
The object of the invention is exactly in order to remedy the defective of prior art, provides a kind of hot investment casting heat hard compound shell-producing technology, and this method has reduced labour intensity and production cycle, has eliminated useless chemical liquids, has improved the stability of casting quality.
The present invention realizes through following technical scheme:
The hard compound shell-producing technology of hot investment casting heat is characterized in that: carry out according to the following steps successively:
At first, use Ludox to make 4-5 layer shell, afterwards, said shell is placed on the plain plate that has an opening, shell is placed on the position that is positioned at the opening top on the plain plate according to the technology of Lost Wax Casting shell.
Then, get sandbox, it is outer and place it on the plain plate that sandbox is enclosed within shell; In sandbox, fill up precoated sand.
At last; In shell, feed hot-air through the opening on the plain plate, sclerosis takes place and obtains the precoated sand hardened layer in the precoated sand chance heat of pressing close to the shell surface, treats that the precoated sand thin hardened layer stops heating when reaching 5-10mm; The precoated sand of removing sandbox and sclerosis not taking place obtains shell.Said shell can carry out pouring metal melt.
The hard compound shell-producing technology of described hot investment casting heat, it is characterized in that: include steel pipe, said steel pipe stretches in the shell from the opening on the plain plate, and said hot-air is delivered in the shell through steel pipe.
Said unhardened loose precoated sand falls in the container, can reuse.
The present invention is directed to poured weights is the medium-and-large-sized foundry goods of 150-500kg, and 4-5 layer shell before by existing system shell side method preparing silicon collosol after dewaxing, in precoated sand, heats shell with Ludox shell landfill.Meet heat near the overlay film layer of sand of Ludox shell and harden, form the compound shell that becomes one with the Ludox shell.In compound shell, pour into molten metal at last.
Advantage of the present invention is:
This method is made 4-5 layer shell with medium-and-large-sized foundry goods module,, the shell that makes is reached resist the required intensity of molten metal pressure at shell surface coverage one deck precoated sand hardened layer through thermmohardening.Technology of the present invention has reduced labour intensity and production cycle, has reduced material consumption, has eliminated useless chemical liquids, has improved the stability of casting quality.
Description of drawings
Fig. 1 is the structural representation when in shell, feeding hot-air.
Fig. 2 is the structural representation of shell.
The specific embodiment:
The hard compound shell-producing technology of hot investment casting heat, carry out successively according to the following steps:
At first, use Ludox to make 4-5 layer shell 1, afterwards, said shell 1 is placed on the plain plate 2 that a part has opening, shell 1 is placed on the position that is positioned at the opening top on the plain plate 2 according to the technology of Lost Wax Casting shell;
Then, get sandbox 3, it is outer and place it on the plain plate 2 that sandbox 3 is enclosed within shell 1; In sandbox 3, fill up precoated sand 4;
At last, get steel pipe 5, steel pipe 5 is stretched in the shell 1 from the opening on the plain plate 2, and hot-air 6 is delivered in the shell 1 through steel pipe 5.The precoated sand 4 of pressing close to shell 1 surface is met heat and sclerosis takes place is obtained precoated sand hardened layer 7, treats that precoated sand hardened layer 7 thickness stop heating when reaching 5-10mm, and the precoated sand of removing sandbox 3 and sclerosis taking place obtains shell.
Claims (2)
1. the hard compound shell-producing technology of hot investment casting heat is characterized in that: carry out according to the following steps successively:
At first, use Ludox to make 4-5 layer shell, afterwards, said shell is placed on the plain plate that has an opening, shell is placed on the position that is positioned at the opening top on the plain plate according to the technology of Lost Wax Casting shell;
Then, get sandbox, it is outer and place it on the plain plate that sandbox is enclosed within shell; In sandbox, fill up precoated sand;
At last; In shell, feed hot-air through the opening on the plain plate, sclerosis takes place and obtains the precoated sand hardened layer in the precoated sand chance heat of pressing close to the shell surface, treats that the precoated sand thin hardened layer stops heating when reaching 5-10mm; The precoated sand of removing sandbox and sclerosis not taking place obtains shell.
2. the hard compound shell-producing technology of hot investment casting heat according to claim 1, it is characterized in that: include steel pipe, said steel pipe stretches in the shell from the opening on the plain plate, and said hot-air is delivered in the shell through steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010507237A CN102000774B (en) | 2010-10-14 | 2010-10-14 | Precision casting hot and hard compound shell making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010507237A CN102000774B (en) | 2010-10-14 | 2010-10-14 | Precision casting hot and hard compound shell making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102000774A CN102000774A (en) | 2011-04-06 |
| CN102000774B true CN102000774B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010507237A Active CN102000774B (en) | 2010-10-14 | 2010-10-14 | Precision casting hot and hard compound shell making process |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972066A (en) * | 2015-06-15 | 2015-10-14 | 江苏万恒铸业有限公司 | Thin-shell sand culturing casting simple technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683099A (en) * | 2005-02-02 | 2005-10-19 | 哈尔滨鑫润精铸工业有限公司 | Fine casting method for super long lower pressure partition guide blade of turbine in stainless steel investment mold |
| JP2007030028A (en) * | 2005-07-29 | 2007-02-08 | Toyota Motor Corp | Method and apparatus for forming water soluble core |
| CN101462151A (en) * | 2009-01-16 | 2009-06-24 | 哈尔滨工业大学 | Method for preparing TiAl-based alloy formwork by precision-investment casting |
| CN101642798A (en) * | 2009-08-11 | 2010-02-10 | 武汉机械工艺研究所有限责任公司 | New method for manufacturing composite coating shell for precisely casting fusible patterns |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54148131A (en) * | 1978-05-15 | 1979-11-20 | Mitsubishi Heavy Ind Ltd | High speed mold making |
| JPS62176634A (en) * | 1986-01-28 | 1987-08-03 | Sintokogio Ltd | Molding method for shell core |
| JPH01127139A (en) * | 1987-11-10 | 1989-05-19 | Mitsubishi Motors Corp | Method for molding shell mold core |
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2010
- 2010-10-14 CN CN201010507237A patent/CN102000774B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683099A (en) * | 2005-02-02 | 2005-10-19 | 哈尔滨鑫润精铸工业有限公司 | Fine casting method for super long lower pressure partition guide blade of turbine in stainless steel investment mold |
| JP2007030028A (en) * | 2005-07-29 | 2007-02-08 | Toyota Motor Corp | Method and apparatus for forming water soluble core |
| CN101462151A (en) * | 2009-01-16 | 2009-06-24 | 哈尔滨工业大学 | Method for preparing TiAl-based alloy formwork by precision-investment casting |
| CN101642798A (en) * | 2009-08-11 | 2010-02-10 | 武汉机械工艺研究所有限责任公司 | New method for manufacturing composite coating shell for precisely casting fusible patterns |
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| CN102000774A (en) | 2011-04-06 |
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Denomination of invention: Precision casting hot and hard compound shell making process Effective date of registration: 20170606 Granted publication date: 20121010 Pledgee: Bank of China Limited by Share Ltd Mount Holyoke branch Pledgor: Anhui Yingliu Casting Industry Co., Ltd. Registration number: 2017340000085 |