CN108500207A - investment casting method - Google Patents
investment casting method Download PDFInfo
- Publication number
- CN108500207A CN108500207A CN201710108530.1A CN201710108530A CN108500207A CN 108500207 A CN108500207 A CN 108500207A CN 201710108530 A CN201710108530 A CN 201710108530A CN 108500207 A CN108500207 A CN 108500207A
- Authority
- CN
- China
- Prior art keywords
- wax
- formwork
- putamina
- sand mold
- casting method
- 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.)
- Pending
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Classifications
-
- 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
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
Abstract
The invention discloses a kind of investment casting methods comprising following steps：Pass through wooden Mold Making sand mold；Silica-sol wash is painted in the inner surface of sand mold and is dried in the shade；Wax base is made by sand mold；The surface for the wax base made is modified, and wax base is connected with dead head, wax-pattern is made；Putamina coating is painted in the outer surface for the wax-pattern made and carries out consolidation process；It dewaxes after putamina coating dries in the shade, obtains putamina；Formwork is roasted；Formwork is put into vacuum drying oven, molten steel is cast in formwork；It clears up formwork and cuts off dead head and obtain finished product.The present invention has reached the advantageous effect for reducing production cost by using wooden mold；The present invention can make finished surface smooth and have preferable inherent quality by carrying out steel casting in a vacuum；The finished product produced through the invention has preferable surface quality and dimensional accuracy.
Description
Technical field
The present invention relates to a kind of investment casting methods.
Background technology
In the prior art, investment pattern precision casting is generally carried out using the mold of aluminum, but due to die manufacturing cost costliness, deposited
In the problem that production cost is excessively high.How to make product that there is preferable surface quality and size essence while reducing die cost
Degree is urgent problem in the industry.
Invention content
The technical problem to be solved by the present invention is in order to overcome, die manufacturing cost is high in investment pattern precision casting in the prior art
Expensive excessively high defect, provides a kind of investment casting method.
The present invention is to solve above-mentioned technical problem by following technical proposals：
A kind of investment casting method, feature are comprising following steps：
S1：Pass through wooden Mold Making sand mold；
S2：Silica-sol wash is painted in the inner surface for the sand mold made and is dried in the shade；
S3：Wax base is made by the sand mold；
S4：The surface for the wax base made is modified, and the wax base is connected with dead head, wax-pattern is made；
S5：Putamina coating is painted in the outer surface for the wax-pattern made and carries out consolidation process；
S6：It dewaxes after the putamina coating dries in the shade, obtains putamina；
S7：The formwork is roasted using chamber type electric resistance furnace or Natural Gas stove, and the formwork is made to reach refining
The requirement of steel casting；
S8：The formwork is put into vacuum drying oven, and is made steel using the vacuum drying oven, waits for that liquid steel temperature reaches refining
It is required that after temperature, molten steel is cast in the formwork；
S9：It clears up the formwork and cuts off the dead head and obtain finished product.
In the technical scheme, silica-sol wash is painted by the inner surface to the sand mold and dries in the shade and modifies making
The surface of the good wax base, improves the surface smoothness of the wax base, to make last finished product have preferable surface matter
Amount and dimensional accuracy.In addition, when the quantity of the dead head is arranged, in order to make the molten steel equably fill out under vacuum conditions
The formwork is filled, several dead heads should be set, several dead heads are connect with the wax base, and several described pour emits
Mouth is spaced apart.
Preferably, the painting layer number of the silica-sol wash in step s 2 is three layers or four layers.
In the technical scheme, when coating the silica-sol wash, ensure that the inner surface of the sand mold not blister, reach
To the effect of smooth surface.
Preferably, the material of the putamina coating is Ludox.
Preferably, further comprising the steps of in the step S3：
S31：Remover or oil are painted in the inner surface of the sand mold；
S32：Wax is injected to the inside of the sand mold, the wax is solidified as wax pattern in the sand mold；
S33：By wax pattern molding from the sand mold, and it is the wax base to be put into cooled and solidified inside cooling water tank；
S34：By the wax base in 25 DEG C of indoor placements 24 hours.
In the technical scheme, by being put into cooled and solidified inside cooling water tank, keep the shape of the wax base more fixed；
Meanwhile by 25 DEG C of indoor placements 24 hours, preventing the wax base from expanding with heat and contract with cold, in subsequent process the wax base
In be deformed.
Preferably, further comprising the steps of in step s 5：
S51：After the outer surface of the wax-pattern coats five layers of the putamina coating, using fixing piece to the putamina coating
It is reinforced；
S52：Continue to coat two layers or three layers of the putamina coating in the outer surface for the wax-pattern reinforced.
Preferably, the fixing piece in step s 51 is iron wire.
Preferably, further comprising the steps of in the step s 7：
S71：First time roasting is carried out to the formwork using chamber type electric resistance furnace or Natural Gas stove, and in the formwork
It is cooled down after completing preroast；
S72：The formwork after cooling is put into the chamber type electric resistance furnace or the Natural Gas stove carries out second
Roasting is to reach the requirement of steel casting.
In the technical scheme, it is roasted by first time, reinforces the intensity of the formwork；It is roasted by second, makes institute
The temperature for stating formwork reaches the processing temperature requirement of next step steel casting, and the temperature of the formwork is generally 900 DEG C.
Preferably, the temperature of the chamber type electric resistance furnace or the Natural Gas stove in the step S71 is 1050
DEG C, soaking time is 1.5 hours.Under this condition, the formwork reaches suitable strength.
The positive effect of the present invention is that：
The present invention has reached the advantageous effect for reducing production cost by using wooden mold；The present invention passes through in vacuum
Middle carry out steel casting can make finished surface smooth and have preferable inherent quality；The finished product tool produced through the invention
There are preferable surface quality and dimensional accuracy.
Description of the drawings
Fig. 1 is the flow chart of the investment casting method of the present invention.
Specific implementation mode
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
Understood incorporated by reference to Fig. 1, the implementation case provides a kind of investment casting method comprising following steps：
S101：Pass through wooden Mold Making sand mold；
S102：Silica-sol wash is painted in the inner surface for the sand mold made and is dried in the shade；
S103：Remover or oil are painted in the inner surface of the sand mold；
S104：Wax is injected to the inside of the sand mold, the wax is solidified as wax pattern in the sand mold；
S105：By wax pattern molding from the sand mold, and it is wax base to be put into cooled and solidified inside cooling water tank；
S106：By the wax base in 25 DEG C of indoor placements 24 hours；
S107：The surface for the wax base made is modified, and the wax base is connected with dead head, wax-pattern is made；
S108：After the outer surface of the wax-pattern coats five layers of the putamina coating, the putamina is applied using fixing piece
Material is reinforced；
S109：Continue to coat two layers or three layers of the putamina coating in the outer surface for the wax-pattern reinforced；
S110：It dewaxes after the putamina coating dries in the shade, obtains putamina；
S111：First time roasting is carried out to the formwork using chamber type electric resistance furnace or Natural Gas stove, and in the mould
Shell is cooled down after completing preroast；
S112：The formwork after cooling is put into the chamber type electric resistance furnace or the Natural Gas stove carries out second
Roasting is to reach the requirement of steel casting；
S113：The formwork is put into vacuum drying oven, and is made steel using the vacuum drying oven, waits for that liquid steel temperature reaches essence
After refining requires temperature, molten steel is cast in the formwork；
S114：It clears up the formwork and cuts off the dead head and obtain finished product.
In step s 102, the painting layer number of the silica-sol wash is three layers or four layers.Coating the Ludox
When coating, ensures that the inner surface of the sand mold not blister, achieve the effect that smooth surface.
In step S105, by being put into cooled and solidified inside cooling water tank, keep the shape of the wax base more fixed.
In step s 106, by 25 DEG C of indoor placements 24 hours, preventing the wax base from expanding with heat and contract with cold the wax base,
It is deformed in subsequent process.
In step S108, S109 and S110, the material of the putamina coating is Ludox.It is solid described in step S108
It is iron wire to determine part.
In step S111, is roasted by first time, reinforce the intensity of the formwork.Preferably, by the way that the case is arranged
The temperature of formula resistance furnace or the Natural Gas stove is 1050 DEG C, and soaking time is 1.5 hours, and the formwork is made to reach best
Intensity.
In step S112, is roasted by second, the temperature of the formwork is made to reach the processing of next step steel casting
The temperature of temperature requirement, the formwork is generally 900 DEG C.
In step S113, by carrying out steel casting in a vacuum furnace, make finished surface that there is more preferably surface quality
And dimensional accuracy.
In the present invention, silica-sol wash is painted by the inner surface to the sand mold and dries in the shade and modifies and made
The surface smoothness of the wax base is improved on the surface of the wax base, to make last finished product have preferable surface quality and
Dimensional accuracy.
In the present embodiment, when the quantity of the dead head is arranged, in order to keep the molten steel uniform under vacuum conditions
The formwork is filled on ground, and several dead heads should be arranged, and several dead heads are connect with the wax base, and several described
Dead head is spaced apart.
The investment casting method of the present invention, be particularly suitable for not solderable material (such as nickelic copper master alloy, it is nickeliferous in the alloy
Element and higher containing copper), due to being unable to repair welding, and it is easy surge in antivacuum steel-making and is deformed, it is desirable to
It is produced in vacuum and finished product can settle at one go and reach higher surface quality and dimensional accuracy.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (8)
1. a kind of investment casting method, which is characterized in that it includes the following steps：
S1：Pass through wooden Mold Making sand mold；
S2：Silica-sol wash is painted in the inner surface for the sand mold made and is dried in the shade；
S3：Wax base is made by the sand mold；
S4：The surface for the wax base made is modified, and the wax base is connected with dead head, wax-pattern is made；
S5：Putamina coating is painted in the outer surface for the wax-pattern made and carries out consolidation process；
S6：It dewaxes after the putamina coating dries in the shade, obtains putamina；
S7：The formwork is roasted using chamber type electric resistance furnace or Natural Gas stove, and so that the formwork is reached steel-making and pours
The requirement of casting；
S8：The formwork is put into vacuum drying oven, and is made steel using the vacuum drying oven, waits for that liquid steel temperature reaches refining and requires
After temperature, molten steel is cast in the formwork；
S9：It clears up the formwork and cuts off the dead head and obtain finished product.
2. investment casting method as described in claim 1, which is characterized in that the painting of the silica-sol wash in step s 2
Layer number is three layers or four layers.
3. investment casting method as described in claim 1, which is characterized in that the material of the putamina coating is Ludox.
4. investment casting method as described in claim 1, which is characterized in that further comprising the steps of in the step S3：
S31：Remover or oil are painted in the inner surface of the sand mold；
S32：Wax is injected to the inside of the sand mold, the wax is solidified as wax pattern in the sand mold；
S33：By wax pattern molding from the sand mold, and it is the wax base to be put into cooled and solidified inside cooling water tank；
S34：By the wax base in 25 DEG C of indoor placements 24 hours.
5. investment casting method as described in claim 1, which is characterized in that further comprising the steps of in step s 5：
S51：After the outer surface of the wax-pattern coats five layers of the putamina coating, the putamina coating is carried out using fixing piece
It reinforces；
S52：Continue to coat two layers or three layers of the putamina coating in the outer surface for the wax-pattern reinforced.
6. investment casting method as claimed in claim 5, which is characterized in that the fixing piece in step s 51 is iron wire.
7. investment casting method as described in claim 1, which is characterized in that further comprising the steps of in the step s 7：
S71：First time roasting is carried out to the formwork using chamber type electric resistance furnace or Natural Gas stove, and is completed in the formwork
It is cooled down after preroast；
S72：The formwork after cooling is put into the chamber type electric resistance furnace or the Natural Gas stove carries out second and roasts
To reach the requirement of steel casting.
8. investment casting method as claimed in claim 7, which is characterized in that the box resistance in the step S71
The temperature of stove or the Natural Gas stove is 1050 DEG C, and soaking time is 1.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710108530.1A CN108500207A (en) | 2017-02-27 | 2017-02-27 | investment casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710108530.1A CN108500207A (en) | 2017-02-27 | 2017-02-27 | investment casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108500207A true CN108500207A (en) | 2018-09-07 |
Family
ID=63373073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710108530.1A Pending CN108500207A (en) | 2017-02-27 | 2017-02-27 | investment casting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108500207A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604521A (en) * | 2018-11-23 | 2019-04-12 | 安徽应流铸业有限公司 | A kind of preparation method that the compound shell mold of essence casting is reinforced |
| CN112404357A (en) * | 2020-11-02 | 2021-02-26 | 丹东大王精铸有限公司 | Structure for light building foundation and processing method thereof |
Citations (6)
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|---|---|---|---|---|
| GB2366232A (en) * | 2000-08-21 | 2002-03-06 | Kindt Collins Company | Filler material and wax composition for use in investment casting |
| JP2004098075A (en) * | 2002-09-05 | 2004-04-02 | Daido Steel Co Ltd | Method for casting cantilever blade |
| CN102151790A (en) * | 2010-02-11 | 2011-08-17 | 上海中洲特种合金材料有限公司 | Investment casting method of heavy castings |
| CN103273010A (en) * | 2013-05-06 | 2013-09-04 | 无锡山发精铸科技有限公司 | Near net shape casting method of fine grain block casting turbine for lightweight gas turbine |
| CN104325081A (en) * | 2014-10-30 | 2015-02-04 | 西安航空动力股份有限公司 | Preparation method of combined type shell with heat insulating materials implanted therein |
| CN105728644A (en) * | 2016-04-19 | 2016-07-06 | 温州索尔特铸业有限公司 | Manufacturing method of complex and refined investment casting |
-
2017
- 2017-02-27 CN CN201710108530.1A patent/CN108500207A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2366232A (en) * | 2000-08-21 | 2002-03-06 | Kindt Collins Company | Filler material and wax composition for use in investment casting |
| JP2004098075A (en) * | 2002-09-05 | 2004-04-02 | Daido Steel Co Ltd | Method for casting cantilever blade |
| CN102151790A (en) * | 2010-02-11 | 2011-08-17 | 上海中洲特种合金材料有限公司 | Investment casting method of heavy castings |
| CN103273010A (en) * | 2013-05-06 | 2013-09-04 | 无锡山发精铸科技有限公司 | Near net shape casting method of fine grain block casting turbine for lightweight gas turbine |
| CN104325081A (en) * | 2014-10-30 | 2015-02-04 | 西安航空动力股份有限公司 | Preparation method of combined type shell with heat insulating materials implanted therein |
| CN105728644A (en) * | 2016-04-19 | 2016-07-06 | 温州索尔特铸业有限公司 | Manufacturing method of complex and refined investment casting |
Non-Patent Citations (3)
| Title |
|---|
| 冯荣锡: "《木模工工作法》", 31 March 1983, 上海科学技术出版社 * |
| 张明之: "《铸造词典》", 30 April 1986, 中国农业机械出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604521A (en) * | 2018-11-23 | 2019-04-12 | 安徽应流铸业有限公司 | A kind of preparation method that the compound shell mold of essence casting is reinforced |
| CN112404357A (en) * | 2020-11-02 | 2021-02-26 | 丹东大王精铸有限公司 | Structure for light building foundation and processing method thereof |
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Application publication date: 20180907 |