CN101406933A - Wax liquor discharging technique for dewaxing of precision casting shell - Google Patents
Wax liquor discharging technique for dewaxing of precision casting shell Download PDFInfo
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- CN101406933A CN101406933A CNA2008101592773A CN200810159277A CN101406933A CN 101406933 A CN101406933 A CN 101406933A CN A2008101592773 A CNA2008101592773 A CN A2008101592773A CN 200810159277 A CN200810159277 A CN 200810159277A CN 101406933 A CN101406933 A CN 101406933A
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Abstract
The invention discloses a process for discharging wax liquid in the process of dewaxing a precise casting mould shell without residual wax liquid, which comprises the following steps: (1) after an assembling mode of a wax piece is determined, the lowest point where the wax liquid is difficult to flow out when the wax piece is dewaxed on a die set is determined, and then a wax-discharging channel is pre-designed at the lowest point when a wax mould is designed, wherein one end of the wax-discharging channel is connected with the lowest point of a wax mould, while the other end is connected with an internal pouring channel or a main pouring channel in the wax mould, and the distance between the contact point of the wax-discharging channel and the internal pouring channel or the main pouring channel and a pouring basin in the vertical direction is smaller than the distance between the lowest point and the pouring basin; (2) the slurrying, sanding, and drying are performed on the wax mould layer by layer; (3) dewaxing is performed; and (4) a mould shell is poured, wherein after a cast product is formed, residual metals formed on the wax-discharging channel are cut away. The process has the advantages of not only reducing the wax material consumption and reducing the cost obviously, but also reducing the defects of slag inclusion and impurity inclusion for the cast product, improving the quality of the cast product, having good use effect, consuming few wax materials and the like.
Description
Technical field
The present invention relates to a kind of Wax liquor discharging technique for dewaxing of precision casting shell, particularly the Wax liquor discharging technique that dewaxes with high steam shell lost-wax process.
Background technology
Along with the development of society, precision casting has been widely applied to aviation, weapons department at interior all industrial departments, particularly electronics, oil, chemical industry, communications and transportation, light industry, weaving, pharmacy, medicine equipment, pump and valve member.Precision-investment casting is a kind of casting technique of cutting less or not having cutting, and casting dimension accuracy height, the surface roughness value of producing is low, flexibility is high, adaptability is strong, and special in the complex-shaped parts of foundry goods, the superiority of this casting is more remarkable.In precision-investment casting, owing to will produce the casting structure characteristics, in the shell dewaxing process, a part of wax of module can not flow out shell in the die cavity, certainly will cause a part of wax to be retained in the shell like this.Because in precision-investment casting, wax is that circulation reuses, some impurity that is bound in recycling process, dust are dissolved in the wax, and when the shell roasting, the wax of leaving over will burn like this.Wax is a kind of expensive hot investment casting raw material, and the burning of wax material can cause the significantly rising of precision casting cost.Even more serious is residue after the wax burning and the impurity of sneaking into, and can continue to stay in the shell, so in the casting pouring process, this part residue and impurity will be sneaked in the molten steel, in foundry goods, form inclusion defect, have a strong impact on quality of investment shell, even cause waste product.
Summary of the invention
At above-mentioned prior art, the invention provides a kind of Wax liquor discharging technique for dewaxing that makes wax liquid flow out precision casting shell fully.
The present invention is achieved by the following technical solutions:
A kind of Wax liquor discharging technique for dewaxing of precision casting shell, step is as follows:
(1) after the group tree mode of wax spare is determined, can determine the difficult minimum point that flows out of wax liquid when wax spare dewaxes on module, then when wax-pattern designs, design a de-waxing road in advance at the minimum point place, described de-waxing road one end connects the Wax mold minimum point, the other end is connected with the ingate or the main running channel of Wax mold, the contact point of de-waxing road and ingate or main running channel in vertical direction with the distance of cup distance less than minimum point and cup;
(2) wax-pattern successively is stained with slurry, stucco, drying;
(3) dewaxing;
(4) shell cast; The excess metal excision that after the foundry goods moulding de-waxing road is formed.
The step of described Wax liquor discharging technique for dewaxing of precision casting shell also can be as follows:
(1) after the group tree mode of wax spare is determined, can determine the difficult minimum point that flows out of wax liquid when wax spare dewaxes on module, then when wax-pattern designs, design a de-waxing road in advance at the minimum point place, described de-waxing road one end connects the Wax mold minimum point, other end non-contact-point, and the end points of non-contact-point in vertical direction with the distance of cup distance less than minimum point and cup;
(2) to wax-pattern successively be stained with slurry, remove sand, drying, after last one deck drying finishes, a part is removed in the de-waxing road of design in advance, to expose wax material, be not as the criterion and do not hurt wax spare;
(3) dewaxing;
(4) seal the de-waxing road with refractory material the dewaxing back that finishes, and waits and seal the dry roasting cast of carrying out shell after fully, after the foundry goods moulding, removes the unnecessary metal that the de-waxing road forms on the foundry goods at last.
Attention: when sealing, refractory material is crashed in the die cavity, or study carefully into to die cavity inside with refractory material.
After the minimum point that described wax liquid be difficult for to flow out was meant that group tree mode is determined, wax spare was on perpendicular to cup end face direction, apart from the nearest point of cup end face vertical range.
Can not to flow out the reason of shell be the minimum point that the minimum point of wax spare shell is lower than ingate to wax liquid in the prior art, cause wax liquid not flow out the passage of shell, the present invention has the de-waxing road in the minimum point design of Wax mold, in dewaxing process, wax liquid can be discharged shell by this passage, can not cause residual.Not only obviously reduce wax material consumption, reduced cost, and the slag inclusion of foundry goods, inclusion defect are obviously reduced, improved casting quality.The present invention has advantages such as result of use is good, wax material consumption is few.
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment:
Embodiment 1: a kind of Wax liquor discharging technique for dewaxing of precision casting shell, and step is as follows:
(1) after the group tree mode of wax spare is determined, just can determine the difficult minimum point that flows out of wax liquid when wax spare dewaxes on module; Therefore when wax-pattern designs, design a de-waxing road in advance at the minimum point place, described de-waxing road one end connects the Wax mold minimum point, the other end is connected with the ingate of Wax mold, the contact point of de-waxing road and ingate in vertical direction with the distance of cup distance less than minimum point and cup;
(2) wax-pattern successively is stained with slurry, stucco, drying; (number of times of repetition is decided according to technology, and this technology is a routine techniques, repeats no more)
(3) dewaxing;
(4) shell cast; The excess metal excision that after the foundry goods moulding de-waxing road is formed.
Embodiment 2: a kind of Wax liquor discharging technique for dewaxing of precision casting shell, and step is as follows:
(1) after the group tree mode of wax spare is determined, just can determine the difficult minimum point that flows out of wax liquid when wax spare dewaxes on module; Therefore when wax-pattern designs, design a de-waxing road in advance at the minimum point place, described de-waxing road one end connects the Wax mold minimum point, other end non-contact-point, and the end points of non-contact-point in vertical direction with the distance of cup distance less than minimum point and cup;
(2) wax-pattern successively is stained with slurry, stucco, drying, after last one deck drying finishes, a part is removed in the de-waxing road of design in advance,, be not as the criterion and do not hurt wax spare to expose wax material;
(3) dewaxing;
(4) seal the de-waxing road with refractory material the dewaxing back that finishes, and waits and seal the dry roasting cast of carrying out shell after fully, after the foundry goods moulding, removes the unnecessary metal that the de-waxing road forms on the foundry goods at last.
Attention: when sealing, refractory material is crashed in the die cavity, or protrude into die cavity inside with refractory material.
Claims (2)
1. Wax liquor discharging technique for dewaxing of precision casting shell is characterized in that step is as follows:
(1) after the group tree mode of wax spare is determined, can determine the difficult minimum point that flows out of wax liquid when wax spare dewaxes on module, then when wax-pattern designs, design a de-waxing road in advance at the minimum point place, described de-waxing road one end connects the Wax mold minimum point, the other end is connected with the ingate or the main running channel of Wax mold, the contact point of de-waxing road and ingate or main running channel in vertical direction with the distance of cup distance less than minimum point and cup;
(2) wax-pattern successively is stained with slurry, stucco, drying;
(3) dewaxing;
(4) shell cast; The excess metal excision that after the foundry goods moulding de-waxing road is formed.
2. Wax liquor discharging technique for dewaxing of precision casting shell is characterized in that step is as follows:
(1) after the group tree mode of wax spare is determined, can determine the difficult minimum point that flows out of wax liquid when wax spare dewaxes on module, then when wax-pattern designs, design a de-waxing road in advance at the minimum point place, described de-waxing road one end connects the Wax mold minimum point, other end non-contact-point, and the end points of non-contact-point in vertical direction with the distance of cup distance less than minimum point and cup;
(2) wax-pattern successively is stained with slurry, stucco, drying, after last one deck drying finishes, a part is removed in the de-waxing road of design in advance,, be not as the criterion and do not hurt wax spare to expose wax material;
(3) dewaxing;
(4) seal the de-waxing road with refractory material the dewaxing back that finishes, and waits and seal the dry roasting cast of carrying out shell after fully, after the foundry goods moulding, removes the unnecessary metal that the de-waxing road forms on the foundry goods at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101592773A CN101406933A (en) | 2008-11-27 | 2008-11-27 | Wax liquor discharging technique for dewaxing of precision casting shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101592773A CN101406933A (en) | 2008-11-27 | 2008-11-27 | Wax liquor discharging technique for dewaxing of precision casting shell |
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| CN101406933A true CN101406933A (en) | 2009-04-15 |
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| CNA2008101592773A Pending CN101406933A (en) | 2008-11-27 | 2008-11-27 | Wax liquor discharging technique for dewaxing of precision casting shell |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166618A (en) * | 2011-03-16 | 2011-08-31 | 江门市正科金属制品有限公司 | Method for manufacturing balance block for compressors |
| CN102205394A (en) * | 2011-04-28 | 2011-10-05 | 江苏标新久保田工业有限公司 | Hot investment casting method for electric heating element |
| CN103128229A (en) * | 2011-11-26 | 2013-06-05 | 东风精密铸造有限公司 | Investment casting mold cavity cleaning method based on selected area laser powder sintering rapid proto-typing technology application |
| CN105344938A (en) * | 2015-10-30 | 2016-02-24 | 鹰普（中国）有限公司 | Dewaxing method |
| CN105458180A (en) * | 2015-11-20 | 2016-04-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming pouring gate with dewaxing opening and preparing and blocking method of forming pouring gate |
| CN110695317A (en) * | 2019-11-26 | 2020-01-17 | 温州万虹阀门有限公司 | Precise casting process of gate plate casting convenient for wax removal and exhaust |
| CN114210926A (en) * | 2021-12-15 | 2022-03-22 | 中国航发动力股份有限公司 | Turbine blade investment casting shell and casting process thereof |
-
2008
- 2008-11-27 CN CNA2008101592773A patent/CN101406933A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166618A (en) * | 2011-03-16 | 2011-08-31 | 江门市正科金属制品有限公司 | Method for manufacturing balance block for compressors |
| CN102166618B (en) * | 2011-03-16 | 2012-11-28 | 江门市正科金属制品有限公司 | Method for manufacturing balance block for compressors |
| CN102205394A (en) * | 2011-04-28 | 2011-10-05 | 江苏标新久保田工业有限公司 | Hot investment casting method for electric heating element |
| CN103128229A (en) * | 2011-11-26 | 2013-06-05 | 东风精密铸造有限公司 | Investment casting mold cavity cleaning method based on selected area laser powder sintering rapid proto-typing technology application |
| CN105344938A (en) * | 2015-10-30 | 2016-02-24 | 鹰普（中国）有限公司 | Dewaxing method |
| CN105458180A (en) * | 2015-11-20 | 2016-04-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming pouring gate with dewaxing opening and preparing and blocking method of forming pouring gate |
| CN105458180B (en) * | 2015-11-20 | 2017-12-12 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of shaping running channel and its preparation and method for blocking containing wax discharging port |
| CN110695317A (en) * | 2019-11-26 | 2020-01-17 | 温州万虹阀门有限公司 | Precise casting process of gate plate casting convenient for wax removal and exhaust |
| CN114210926A (en) * | 2021-12-15 | 2022-03-22 | 中国航发动力股份有限公司 | Turbine blade investment casting shell and casting process thereof |
| CN114210926B (en) * | 2021-12-15 | 2023-09-22 | 中国航发动力股份有限公司 | Turbine blade investment casting shell and casting process thereof |
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Open date: 20090415 |