CN103978156B - A kind of method controlling investment-casting solidification and cooling - Google Patents
A kind of method controlling investment-casting solidification and cooling Download PDFInfo
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- CN103978156B CN103978156B CN201410076842.5A CN201410076842A CN103978156B CN 103978156 B CN103978156 B CN 103978156B CN 201410076842 A CN201410076842 A CN 201410076842A CN 103978156 B CN103978156 B CN 103978156B
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Abstract
A kind of method controlling investment-casting solidification and cooling, step is: 1) shell within the wax pattern surface forming foundry goods and corresponding running gate system prepares multilamellar, to reach default intensity；2) outside interior shell, need the part changing casting solidification with cooling, bonding for preparing heating/cooling chamber and the corresponding heating/cooling chamber wax-pattern pouring into a mould passage, and outside this heating/cooling chamber wax-pattern with the interior shell prepared, continue the outer shell of preparation multilamellar, until it reaches enough intensity；3) shell is dewaxed and roasting, it is thus achieved that there is casting moulding system and die cavity and heating/cooling chamber and it pours into a mould the overall shell of passage；4) in heating/cooling chamber, pour into a mould specified temp and the molten metal of composition before or after foundry goods pouring metal melt, change foundry goods rate of cooling with local；The present invention can according to different metal and cast shape design heating/cooling chamber with type shape, highly reliable, simple to operate, it is possible to solve investment-casting solidification and control difficult problem with cooling procedure.
Description
Technical field
The present invention relates to investment-casting solidification control field, be specifically related to a kind of control investment-casting solidification with
The method of cooling.
Background technology
Investment-casting is particularly well-suited to manufacture that structure is complicated, size accurately, the high-melting-point alloy of any surface finish
Thin-section casting and single-casting.But day by day complicating and casting quality requirement carried along with casting structure
Height, foundry goods only molding is difficult to meet demand, and the solidification process controlling foundry goods becomes model casting
Important topic.
The correlation report that model casting solidification process controls at present is the most few.Owing to shell is before cast
Can be preheating to uniform temperature, model casting can not add chill change as sand casting in casting mold and solidify
Journey.There is research to use quenching to change the solidification process of shell local, but the method is by speed of blowing
Degree, the many factors impacts such as distance, air-blowing quantity of blowing, the poor repeatability of field conduct, it is difficult to ensure every
Individual foundry goods all reaches intended cooling effect.And some special cast environment, such as vacuum environment, it is centrifuged
Environment etc., it is difficult to the method using quenching.
Summary of the invention
In order to solve the problem that above-mentioned existing technique exists, it is an object of the invention to provide a kind of control and melt
Die casting solidification and the method for cooling, have the advantages that control accuracy is high, reliability is high.
For reaching object above, the present invention adopts the following technical scheme that
A kind of method controlling investment-casting solidification and cooling, by making attached at investment-casting specific part
Adding chamber, in additional chamber, cast is heated or cooled solidification and the cooling procedure controlling foundry goods with molten metal,
Specifically include following steps:
Step 1: shell 2 within multilamellar is prepared on wax-pattern 1 surface forming foundry goods and corresponding running gate system, with
Reach default intensity；
Step 2: outside interior shell 2, need to change the part of casting solidification and cooling, bonding for preparing
Heating/cooling chamber and the heating/cooling chamber wax-pattern 3 of its cast passage, and at this heating/cooling chamber wax-pattern 3
Continue outer with interior shell 2 prepares the outer shell 4 of multilamellar, until it reaches enough intensity；
Step 3: internally the overall shell 5 of shell 2 and outer shell 4 composition carries out dewaxing and roasting, it is thus achieved that
There is casting moulding system and die cavity 6 and heating/cooling chamber and the overall shell 5 of its cast passage 7；
Step 4: before foundry goods molten metal 8 cast, pours into a mould in heating/cooling chamber and its cast passage 7 and adds
Heat or cooling molten metal 9, improve with local or reduce shell temperature；Or in casting pouring or cooling procedure,
In heating/cooling chamber and its cast passage 7, cast is heated or cooled with molten metal 9, improve with local or
Reduce foundry goods rate of cooling.
The cast used and cooler environment are atmospheric environment or vacuum environment.
Advantages of the present invention is as follows:
1) present invention is used can accurately, reliable to control the solidification process of foundry goods.Heating/cooling chamber
Design has the highest motility, by appropriate design heating/cooling chamber, rationally selects to heat/cooling metal,
Can realize various metal, the solidification process of variously-shaped foundry goods controls.
2) present invention is workable to the control of casting solidification cooling procedure, have the highest multiplicity and
Predictability, will not dramatically increase difficulty and the manufacturing cycle of shell preparation process, it is possible to realize batch raw
Produce, and the mode such as available numerical simulation obtains Expected Results.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of shell of the present invention preparation and dewaxing process.
Fig. 2 is the technical process signal that before the present invention realizes pouring cast part molten metal, local changes cooling condition
Figure.
Technical process when Fig. 3 is that after the present invention realizes pouring cast part molten metal, local changes cooling condition is shown
It is intended to.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
To use sn-bi alloy as cooling down metal, as a example by the process of cast aluminum alloy investment-casting.
As it is shown in figure 1, prepare two-layer surface layer, one layer of transition zone, one layer of back of the body on wax-pattern 1 surface of foundry goods
Layer composition has the interior shell 2 of preset strength；
Outside interior shell 2, need the part changing casting solidification with cooling, bonding for making by liquid wax
Standby heating/cooling chamber and the heating/cooling chamber wax-pattern 3 of its cast passage.At this heating/cooling chamber wax-pattern 3
Continue preparation four layer backing layer composition outer with interior shell 2 have the outer shell 4 of sufficient intensity；
Internally the overall shell 5 of shell 2 and outer shell 4 composition dewaxes, and roasting, it is thus achieved that have
Casting moulding system and die cavity 6 and heating/cooling chamber and the overall shell 5 of its running gate system 7；
Such as Fig. 2, before cast aluminum alloy, the heating/cooling chamber at the shell being pre-heated to 500 DEG C waters with it
In note passage 7, pouring temperature is the sn-bi alloy of 200 DEG C, reduces shell temperature with local；Water at foundry goods again
In injection system and die cavity 6, pouring temperature is the aluminium alloy of 700 DEG C, clear shell after cooling down completely, obtains aluminum and closes
Gold foundry goods and the sn-bi alloy coolant opened by type shell material isolation with foundry goods.
Or as it is shown on figure 3, pouring temperature is the aluminium alloy of 700 DEG C in casting moulding system and die cavity 6,
In heating/cooling chamber and its cast passage 7, pouring temperature is the sn-bi alloy of 200 DEG C again, with local fall
Low shell temperature, clear shell after cooling down completely, obtain aluminium alloy castings and with foundry goods by type shell material every
The sn-bi alloy coolant opened absolutely.
Claims (2)
1. the method controlling investment-casting solidification and cooling, it is characterised in that: by investment-casting
Specific part makes additional chamber, and in additional chamber, cast is heated or cooled and controls the solidifying of foundry goods with molten metal
Gu and cooling procedure, specifically include following steps:
Step 1: shell (2) within multilamellar is prepared on wax-pattern (1) surface forming foundry goods and corresponding running gate system,
To reach default intensity；
Step 2: at interior shell (2) outward, need to change the part of casting solidification and cooling, bonding for
Preparation heating/cooling chamber and the heating/cooling chamber wax-pattern (3) of its cast passage, and in this heating/cooling
Chamber wax-pattern (3) continues outward with interior shell (2) to prepare the outer shell (4) of multilamellar, until it reaches enough is strong
Degree；
Step 3: the overall shell (5) that internally shell (2) and outer shell (4) form carry out dewaxing and
Roasting, it is thus achieved that there is casting moulding system and die cavity (6) and heating/cooling chamber and its cast passage (7)
Overall shell (5)；
Step 4: before foundry goods molten metal (8) cast, in heating/cooling chamber and its cast passage (7)
Cast is heated or cooled with molten metal (9), improves with local or reduces shell temperature；Or casting pouring or
In cooling procedure, in heating/cooling chamber and its cast passage (7), cast is heated or cooled and uses molten metal (9),
Improve with local or reduce foundry goods rate of cooling.
A kind of method controlling investment-casting solidification and cooling the most according to claim 1, its feature
It is: the cast used and cooler environment are atmospheric environment or vacuum environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410076842.5A CN103978156B (en) | 2014-03-04 | 2014-03-04 | A kind of method controlling investment-casting solidification and cooling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410076842.5A CN103978156B (en) | 2014-03-04 | 2014-03-04 | A kind of method controlling investment-casting solidification and cooling |
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| Publication Number | Publication Date |
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| CN103978156A CN103978156A (en) | 2014-08-13 |
| CN103978156B true CN103978156B (en) | 2016-08-17 |
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| CN201410076842.5A Active CN103978156B (en) | 2014-03-04 | 2014-03-04 | A kind of method controlling investment-casting solidification and cooling |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439067B (en) * | 2014-10-09 | 2017-08-29 | 湖南先淘不锈钢卫浴有限公司 | Core shell unifies deep hole part process for making shell |
| CN105170950A (en) * | 2015-09-25 | 2015-12-23 | 无锡环宇精密铸造有限公司 | Hydrocooling casting method for precision casting of fired mold |
| CN105750494B (en) * | 2016-03-04 | 2018-01-05 | 清华大学 | Double-decker casting mold |
| CN105750499B (en) * | 2016-04-21 | 2018-02-09 | 清华大学 | A kind of method using profile-followed chill and forced convertion to investment-casting Local cooling |
| CN108907094B (en) * | 2018-07-26 | 2020-09-18 | 安吉百福艺术品有限公司 | High-precision casting method for copper three-dimensional patterns |
| CN110899671A (en) * | 2019-12-09 | 2020-03-24 | 马鞍山市黎明天工自动化设备有限公司 | Casting solidification control method |
| CN113560496A (en) * | 2021-08-10 | 2021-10-29 | 贵州安吉航空精密铸造有限责任公司 | Casting forming method for martensitic stainless steel casting |
| CN113996751A (en) * | 2021-10-13 | 2022-02-01 | 中国航发北京航空材料研究院 | Method for refining local structure grains by titanium alloy precision casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651799A (en) * | 1986-01-30 | 1987-03-24 | Hitchiner Manufacturing Co., Inc. | Vented casting molds and process of making the same |
| CN101406932A (en) * | 2008-11-10 | 2009-04-15 | 泉州腾达精铸有限公司 | Precision-investment casting method |
| CN101767193A (en) * | 2009-12-25 | 2010-07-07 | 沈阳工业大学 | Process method for eliminating loose of thick and large casting of high-temperature alloy |
| CN103071765A (en) * | 2012-12-27 | 2013-05-01 | 清华大学 | Partial air cooling method for precast aperture passage in investment casting shell |
| CN103192027A (en) * | 2013-03-28 | 2013-07-10 | 清华大学 | Partial cooling method of cold iron in investment casting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0542342A (en) * | 1991-08-08 | 1993-02-23 | Kobe Steel Ltd | Ceramic shell mold |
-
2014
- 2014-03-04 CN CN201410076842.5A patent/CN103978156B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651799A (en) * | 1986-01-30 | 1987-03-24 | Hitchiner Manufacturing Co., Inc. | Vented casting molds and process of making the same |
| CN101406932A (en) * | 2008-11-10 | 2009-04-15 | 泉州腾达精铸有限公司 | Precision-investment casting method |
| CN101767193A (en) * | 2009-12-25 | 2010-07-07 | 沈阳工业大学 | Process method for eliminating loose of thick and large casting of high-temperature alloy |
| CN103071765A (en) * | 2012-12-27 | 2013-05-01 | 清华大学 | Partial air cooling method for precast aperture passage in investment casting shell |
| CN103192027A (en) * | 2013-03-28 | 2013-07-10 | 清华大学 | Partial cooling method of cold iron in investment casting |
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| CN103978156A (en) | 2014-08-13 |
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