CN106475520A - The method for manufacturing the hot investment casting part for vehicle exhaust system - Google Patents
The method for manufacturing the hot investment casting part for vehicle exhaust system Download PDFInfo
- Publication number
- CN106475520A CN106475520A CN201510845473.6A CN201510845473A CN106475520A CN 106475520 A CN106475520 A CN 106475520A CN 201510845473 A CN201510845473 A CN 201510845473A CN 106475520 A CN106475520 A CN 106475520A
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- mould
- coating
- ceramic balls
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- model
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/165—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents in the manufacture of multilayered shell moulds
-
- 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
- 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
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
- B22C7/023—Patterns made from expanded plastic materials
-
- 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
-
- 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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
Abstract
A kind of method for manufacturing the hot investment casting part for vehicle exhaust system includes：The model of product to be manufactured is made using the material in the group constituted selected from wax and plastics；First coating is formed on the surface of model using the first slurry；Second coating is formed on the surface of model for being coated with first coating using the second slurry；First coating and second coating are dry so that mould is formed, and mould is heated to remove model；Mould is preheated, by mould be placed on in open-topped ceramic box and using Ceramic Balls fill ceramic box inside；And by motlten metal is injected in mould with cast product, so as to article of manufacture.
Description
Technical field
It relates to a kind of casting method, manufactures more particularly, to one kind and arranges for vehicle
The method of the hot investment casting part of gas system, when the method can be saved manufacturing cost and be reduced manufacture
Between while providing remarkable heat resistance (heat resistance) and precision.
Background technology
Generally, the part used in automobile exhaust system must not be not subject to 800 DEG C extremely
The discharge gas of 950 DEG C of high temperature.Specifically, because such drive part to have complicated shape,
So included using stainless steel and inconel (Inconel alloy) etc. is substantial amounts of with height
The material of the nickel (Ni) of the costliness of heat resistance is manufacturing such part.
The elements such as aluminium (Al), titanium (Ti) are added in the heat-resisting alloy, to strengthen high temperature
Intensity.In this case, because the addition element such as Al, Ti and air height reaction, institute
To be difficult control alloying element.Therefore, alloying element is dissolved under vacuum conditions and through accurate casting
Make technique to manufacture part.
Precision casting process includes：There is same shape using wax or plastic production with institute's cast product
Model；The model is impregnated in the slurry, with the surface using slurry coating model several times, wherein,
Filler is mixed together with adhesive and powder sand；Drying model；And mould is heated to
100 DEG C to 200 DEG C of temperature is to remove residual wax in a mold and plastics.
Therefore, manufactured mould is heated to 1000 DEG C to 1200 DEG C of temperature, to guarantee melting
The mobility of metal, motlten metal is injected in mould, and cools down mould, then, removes mould
Tool.Then, motlten metal is made through subsequent technique to prepare product.
However, method described above the disadvantage is that, when product is prepared by the method because
The method includes to execute coating processes several times, so human cost Manufacturing cost is higher.Additionally,
The problem of the method is, during pre-heated mould or during injection motlten metal, works as coating
When number of times is reduced, possible mold damage.Traditional dies can easily shake out cast member, and manufacture which
Method met with an open question be because the method include execute coating processes several times, institute
Higher with human cost Manufacturing cost.Further, can damage when coating number of times and arbitrarily being reduced
Mould.
Content of the invention
Therefore, the disclosure has been created in view of the above problems, and the target of the disclosure has been to provide a kind of system
The method for making the hot investment casting part for vehicle exhaust system, the method can be manufactured arranges for vehicle
The hot investment casting part with remarkable precision of gas system, while.Painting is reduced during manufacture mould
Cover number of times.
Another target of the disclosure is to provide a kind of hot investment casting zero manufactured for vehicle exhaust system
The method of part, the method can reduce manpower and manufacturing time and be manufactured into improving productivity ratio and reducing
This.
The technical goal of the disclosure is not limited to target described above, and those skilled in the art
Other technologies target not described herein can be expressly understood from detailed description below.
According to the one side of the disclosure, by providing hot investment casting zero of the manufacture for vehicle exhaust system
The method of part can realize above-mentioned target and other targets, and the method includes：Using wax or plastic production
The model of manufactured product；First coating is formed on the surface of model using the first slurry；Using
Two slurries form second coating on the surface of model for being coated with first coating；Dry first coating and
Second coating is to form mould, and mould is heated to remove model；Mould is preheated,
Mould is placed on in open-topped ceramic box and using in Ceramic Balls filling ceramic box
Portion；And by motlten metal is injected in mould with cast product, so as to article of manufacture.
In this case, the method for manufacturing the hot investment casting part for vehicle exhaust system can enter one
Step includes：Ceramic Balls were heated to before casting prepares 500 DEG C to 700 DEG C of temperature, to remove
Remain in the impurity on the surface of Ceramic Balls.
Casting prepares to include to be preheated to mould 500 DEG C to 1200 DEG C of temperature.
Article of manufacture can include cast product under vacuum conditions, so as to prevent motlten metal by oxygen
Change.
Ceramic Balls can be by aluminum oxide (Al2O3) formed and can include with different-diameter the
One Ceramic Balls and the second Ceramic Balls.In this case, the first Ceramic Balls can have than the second pottery
The big diameter of ball.
Ceramic box can be made up of inconel material (Inconel materials).
The first slurry can be formed by mixing zircon powder and silica gel, and can be by mixing silicic acid
Aluminium, silica gel and sand form the second slurry.
Description of the drawings
From combining in the following detailed description that appended accompanying drawing is carried out, the disclosure can be more clearly understood
Above-mentioned target and other targets, feature and other advantages, in the accompanying drawings：
Fig. 1 shows a kind of manufacture of the preferred embodiment according to the disclosure for vehicle exhaust system
The flow chart of the method for the hot investment casting part of system；And
Fig. 2 is to prepare showing for cast member for explanation according to a kind of preferred embodiment of the disclosure
It is intended to.
Specific embodiment
Hereinafter, appended for reference accompanying drawing is described in detail the preferred embodiment of the disclosure.In description
Before, it should be appreciated that the term used in specification and appended is not interpreted as
The implication of general and dictionary is confined to, and appropriate for best explanation based on permission inventor
Ground is limited the principle of term and is solved based on the implication corresponding with the technical elements of the disclosure and design
Release.Therefore, provided herein describe only be in order at illustrative purpose simple preferred embodiment and
The scope of the present disclosure is not intended to limit, it is understood, therefore, that in the reality without departing substantially from the disclosure
In the case of matter and scope, the various other equivalents that can be replaced when the application is submitted to can be made
Thing and deformation.
With detailed reference to the preferred embodiment of the disclosure, appended shown in the drawings of the disclosure
Embodiment.If it is possible, referring to same or like part using same reference numerals in the accompanying drawings.
The disclosure is characterised by, when manufacturing the tool for vehicle exhaust system using precision casting technology
Have remarkable heat resistance and complicated shape hot investment casting part when, reinforce mould by using Ceramic Balls
Intensity is manufacturing the part with remarkable precision, simultaneously because coating number of times reduces and simplifies technique.
Fig. 1 shows a kind of manufacture of the preferred embodiment according to the disclosure for vehicle exhaust system
The flow chart of the method for the hot investment casting part of system, and Fig. 2 be for explanation according to the one of the disclosure
Plant the schematic diagram of the preparation of the casting of preferred embodiment.
As shown in Figures 1 and 2, it is used for according to a kind of manufacture of preferred embodiment of the disclosure
The method of the hot investment casting part of vehicle exhaust system includes that modelling, the first coating and second are applied
Cover, prepared by mould, casting prepares and article of manufacture.
Modelling may include：Such as it is used for the accurate casting of vehicle exhaust system using wax or plastic production
Make the model of the product to be manufactured of part etc..
When the making of model is completed, when first coats, molten by model is immersed in the dipping
In liquid, the surface of the first slurry coating model including silica gel and zircon powder is used.In this feelings
Under condition, the first coating is repeated once or twice to form first coating.
When the formation of first coating is completed, second coat when, by the sand of powder with include
Silica gel mutually mixes with the backup slurry of alumina silicate to prepare the second slurry, and is being applied using the second slurry
Second coating is formed on the surface of the model for being covered with first coating.
In such a case, it is possible to by executing 3 to 5 formation second coatings of precision casting process,
Its coating number of times is 1 to 5 time, forms the conventional smart of regular backup coating less than executing 6 to 8 times
Close casting technique.In this case, when number of times is coated less than 3 times, in the follow-up of mould 100
Preheat with casting process, possible mold damage 100, so as to produce the cast member of poor quality.Another
Aspect, when number of times is cast more than 5 times, as the manpower needed for manufacture and time increase, therefore can not
Improve productivity ratio and manufacturing cost can not be saved.Therefore, it can execute 3 to 5 coatings.
When the formation of second coating is completed, when prepared by mould, to first coating and second coating
It is dried and heats, removes the model formed by wax or plastics.
In this case, remove model may include：Mould 100 is heated to 100 DEG C to 200 DEG C
Temperature to remove model.In this case, when heating-up temperature is less than 100 DEG C, it may be necessary to
Long-time removing model, so as to produce relatively low productivity ratio.On the other hand, when heating-up temperature is more than
When 200 DEG C, due to wax or Plastics Combustion, impurity (foreign can be formed in mould 100
substances).
In the subsequent fabrication process of model, wax or the recycling plastic being so removed can be made.
When mould 100 is prepared, the pre-heated mould 100 when casting prepares, then, by mould 100
Be placed on in open-topped ceramic box 200, and ceramic box 200 is filled using Ceramic Balls 300
Inside.
In this case, according to the type of the material of motlten metal, mould 100 can be preheated to
500 DEG C to 1200 DEG C of temperature.It is thus possible to improve the precision of product, to guarantee casting process
Motlten metal mobility.
Meanwhile, ceramic box 200 can be formed by inconel.In this case, when using stainless
During the manufacture mould 100 such as steel may mold damage 100, for example, when mould 100 is heated to 1200 DEG C
When, deform mould 100 as heat resistance is not enough.
Additionally, the Ceramic Balls 300 that fills in ceramic box 200 can be by aluminum oxide (Al2O3) formed simultaneously
And may include the first Ceramic Balls 310 with different-diameter and the second Ceramic Balls 320.Herein, first
It is bigger that Ceramic Balls 310 are preferably formed so that 310 to the second Ceramic Balls 320 of the first Ceramic Balls have
Diameter.It is highly preferred that the first Ceramic Balls 310 may be formed such that the diameter of the first Ceramic Balls 310
Be the diameter of the second Ceramic Balls 320 twice big.
Ceramic Balls 300 can be filled in ceramic box 200, so as to be reinforced by reducing coating number of times
Mould 100 according to manufactured by a kind of preferred embodiment of the disclosure.In this case, with make
Compared with the Ceramic Balls with single size, when second Ceramic Balls of the use with relative small diameter
During the hole of 320 the first Ceramic Balls 310 of filling, mould 100 can bear to be applied because of the pressure of motlten metal
Plus load.
It is highly preferred that the first Ceramic Balls 310 can be formed such that the diameter of the first Ceramic Balls 310 is second
The twice of the diameter of Ceramic Balls 320.
Manufacture according to a kind of preferred embodiment of the disclosure is cast for the accurate of vehicle exhaust system
The method for making part can be further included：Heating ceramic ball 300 before casting prepares, with from pottery
The surface removal of impurity of ball 300.
This is because the cast member of poor quality in the Ceramic Balls 300 formed by cheap aluminum oxide, can be caused,
Because in casting process, produce due to forming fine impurity layer on the surface of Ceramic Balls 300
Gas and introduce gases in product.
Therefore, Ceramic Balls 300 can be heated to 500 DEG C to 700 DEG C of temperature, is remained in removing
Impurity on the surface of Ceramic Balls 300.In this case, when Ceramic Balls 300 are heated to being less than
During 500 DEG C of temperature, long-time is needed to come removal of impurity or the possible imperfect combustion of impurity.When will pottery
When porcelain ball 300 is heated to the temperature more than 700 DEG C, the spending for needing to increase removal of impurity may be met with.
Therefore, Ceramic Balls 300 can be heated to 500 DEG C to 700 DEG C of temperature.
When casting preparation described above is completed, in article of manufacture, motlten metal is injected
To in mould 100 with cast product.
In this case, production of articles may include：Cast product under vacuum conditions.This is because
The material manufacture with remarkable heat resistance of such as inconel is usually used in vehicle exhaust system
Used in part.In this case, the problem of inconel is, at high temperature, melts
Melting metal can be excessively oxidated so as to cause quality of item to decline.
Table 1
Table 1 is listed by by the example and comparative example according to a kind of preferred embodiment of the disclosure
The hot investment casting part for vehicle exhaust system for preparing is compared obtained result.
As listed in table 1, it can be seen that the factor that castability produces considerable influence is included
Depend on material and parts casting air, mould 100 second coating number of times, mould 100 pre-
Heating-up temperature, the material of ceramic box 200, mixing have various sizes of Ceramic Balls 300 and pottery
The pretreatment of ball 300.
Firstly, because exhaust gas valve is formed by the stainless steel material shown in example 1 to 5, each waste gas
Valve all includes the minimum thickness part of the thickness with approximate 2mm to 5mm, so at high temperature,
Exhaust gas valve has high oxidation resistance to motlten metal, and thus also can be prepared by air casting useless
Air valve.
It will be appreciated, however, that when the second coating number of times is reduced to less than 3 times, such as in comparative example 1
Described, mould 100 is damaged, so that being unable to cast product.On the other hand, it can be seen that
When the second coating number of times increases at least 6 times, due to the manufacturing cost needed for the second coating and time
Increase, so productivity ratio declines.Therefore, the second coating number of times can be limited in 3 to 5 times.
Additionally, as in described in comparative example 2, when pre-heated mould at a temperature of less than 500 DEG C
When 100, mould 100 is not sufficiently heated, therefore, using motlten metal filling mould 100 it
Before, motlten metal may solidify, so that the lack of fill of motlten metal.Mould 100 can be added
The temperature of heat to 700 DEG C or higher, but, as temperature increases, increase may manufacturing cost.
Therefore, heating-up temperature is limited in 500 DEG C to 700 DEG C of scope.
In this case, when mould 100 is heated to the temperature, as long as 500 DEG C can be born
To 300 series stainless steel of SUS of 700 DEG C of temperature, then can be using the material of ceramic box 200.
Meanwhile, when mould 100 is heated to high temperature, Ceramic Balls 300 are used for reinforcing mould 100.
In the disclosure, the first Ceramic Balls 310 for being used together with 2mm diameter and straight with 1mm
Second Ceramic Balls 320 in footpath.In the state of mould 100 is heated to high temperature, the Ceramic Balls 300
Bear the load applied because of the pressure of motlten metal.
However, as described in comparative example 3 and comparative example 4, there is single diameter when using
During Ceramic Balls 300, possible mold damage 100, wherein, as described in comparative example 6, different
In the Ceramic Balls 300 with single diameter are used, even if not using Ceramic Balls 300 to be likely to damage mould
Tool 100.
Additionally, as described in comparative example 5, when Ceramic Balls 300 not being preheated to 500 DEG C extremely
When 700 DEG C of temperature carrys out removal of impurity in 1 to 2 hour, (heat when mould 100 is heated to high temperature
Or casting) when, toxic gas is produced by the impurity on the surface of residual ceramic ball 300, therefore,
Toxic gas flows to the minute crack of the mould 100 by ceramic coating backward, therefore, has poison gas
Body is introduced in motlten metal, so as to cause casting flaw.
Thus, it will be seen that as described in example 1 to 5, casting air in such as air,
The second casting number of times of 3 to 5 times, for heat 500 DEG C to 700 DEG C of mould 100 temperature,
Use 300 series stainless steel of SUS as ceramic box 200 material, be used in mixed way with 1mm and
The Ceramic Balls 300 of the different-thickness of 2mm and remove the optimum conditions such as impurity in Ceramic Balls 300
The lower 300 series stainless steel part of SUS for preparing the thickness with 2mm to 5mm.
Simultaneously, it can be seen that include the turbine in the minimum thickness portion of thickness with 2mm or less
The condition used by booster turbine impeller is optimum condition.In this case, because turbine wheel
There is the part of the discharge gas for being directly exposed to the high temperature with 800 DEG C to 950 DEG C, it is possible to
Using the inconel series material with good heat resistance.
When inconel series material is prepared into part, inconel series material has good
Good heat resistance, but, when inconel series material is in motlten metal state, chromium ferronickel
Alloy series material is very sensitive to aoxidizing.Therefore, it is necessary to cast inconel in vacuum atm
Series material.Therefore, as described in comparative example 7, it can be seen that when inconel series material
When material fusing and in atmosphere casting inconel series material, motlten metal is oxidized easily,
So that inconel series material cannot be cast.
Additionally, when the second casting number of times is less than 3 times (comparative example 8), as mould 100 is damaged,
Can not possibly be cast.On the other hand, when the second casting number of times is more than or equal to 6 times, may lead
Manufacturing cost is caused to increase.Therefore, the second casting number of times can be limited in 3 to 5 times.
Additionally, because minimum thickness part very thin, institute for heated mould have 100 temperature should be
1000 DEG C higher.Herein, when heating-up temperature is less than 1000 DEG C, mould 100 can not be abundant
Heating, therefore, before using motlten metal filling mould 100, motlten metal may solidify, from
And cause the lack of fill (comparative example 9) of motlten metal.On the other hand, although can be by mould 100
1200 DEG C or higher are heated to, however, it is possible to meet with the increase of corresponding manufacturing cost.Therefore, plus
Hot temperature can be limited in 1000 DEG C to 1200 DEG C of scope.
Because the material of ceramic box 200 can not be born for heat mould 100 1000 DEG C extremely
1200 DEG C of temperature, so the material of unusable ceramic box 200 is used as SUS such as exhaust gas valves
300 series stainless steel materials (comparative example 9).Should be using the high heat resistance of inconel series
Material as ceramic box 200.
As described previously for Ceramic Balls 300, it can be seen that when pottery of the use with single size
Ball 300 (comparative example 11 and comparative example 12) or when not using Ceramic Balls 300 (comparative example 14),
Possible mold damage 100, and it is seen that when not from the surface removal of impurity of Ceramic Balls 300
, there is casting flaw in (comparative example 13) in product.
Thus, it will be seen that as described in example 6 to 10, casting air in such as vacuum,
The second coating number of times of 3 to 5 times, for heat 1000 DEG C to 1200 DEG C of mould 100 temperature,
Use inconel class material as ceramic box 200 material, be used in mixed way with 1mm and 2
The Ceramic Balls 300 of the different-thickness of mm and remove the optimal bar such as impurity in Ceramic Balls 300 before
Under part, the inconel class part of the thickness with 2mm or less can be prepared.
According to the above-mentioned preferred embodiment of the disclosure, once manufacture the precision for vehicle exhaust system
Mo(u)lded piece, then can realize reducing the effect of manufacturing cost approximate 30%, with conventional fine founder
Skill compares, due to reducing the second casting number of times, it is possible to which reduction coats cost and reduces and follows
The ring time.
According to the preferred embodiment of the disclosure, because in manufacture for vehicle exhaust system with Zhuo
Can be using manufacture for vehicle exhaust system during the hot investment casting part that more precision and coating number of times are reduced
The method of the hot investment casting part of system, the method have the effect for reducing manpower and manufacturing time, so as to
Improve productivity ratio and save manufacturing cost.
Although disclose the preferred embodiment of the disclosure for exemplary purpose, however, this area
It should be recognized by those skilled in the art that disclosed in without departing substantially from by claims the scope of the present disclosure and reality
In the case of matter, various transformations, interpolation and replacement can be carried out.
Claims (8)
1. a kind of method for manufacturing the hot investment casting part for vehicle exhaust system, comprises the following steps：
The step of modelling, for using the material in the group constituted selected from wax and plastics
Make the model of product to be manufactured；
The step of first coating, for being formed on the surface of the model using the first slurry
First coating；
The step of second coating, for being coated with the first coating using the second slurry
Second coating is formed on the surface of the model；
The step of prepared by mould, for drying the first coating and the second coating is with shape
Become mould, and the mould is heated to remove the model；
The step of casting prepares, for preheating to the mould, being placed on the mould
With the inside for filling the ceramic box in open-topped ceramic box and using Ceramic Balls；
And
The step of article of manufacture, for by motlten metal is injected in the mould to cast
Product is made, so as to produce the product.
2. method according to claim 1, further includes：The step of the casting prepares
The Ceramic Balls are heated to 500 DEG C to 700 DEG C of temperature before, with from the Ceramic Balls
Surface removal of impurity.
3. method according to claim 1, wherein, includes institute the step of the casting prepares
State mould 500 DEG C are preheated to 1200 DEG C.
4. method according to claim 1, wherein, includes true the step of the article of manufacture
The product is cast under dummy status, to prevent the motlten metal oxidized.
5. method according to claim 1, wherein, the Ceramic Balls formed by aluminum oxide and
Including the first Ceramic Balls with different-diameter and the second Ceramic Balls, wherein, first pottery
Porcelain ball has the diameter bigger than second Ceramic Balls.
6. method according to claim 1, wherein, the ceramic box is formed by inconel.
7. method according to claim 1, wherein, is formed by mixing zircon powder and silica gel
First slurry.
8. method according to claim 1, wherein, by mixing alumina silicate, silica gel and sand
Son forms second slurry.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0122677 | 2015-08-31 | ||
| KR1020150122677A KR101755832B1 (en) | 2015-08-31 | 2015-08-31 | Method of manufacturing precision cast parts for vehicle exhaust system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106475520A true CN106475520A (en) | 2017-03-08 |
| CN106475520B CN106475520B (en) | 2021-02-09 |
Family
ID=54608440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510845473.6A Active CN106475520B (en) | 2015-08-31 | 2015-11-26 | Method of manufacturing precision-cast parts for vehicle exhaust systems |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20170056969A1 (en) |
| EP (1) | EP3135399B1 (en) |
| KR (1) | KR101755832B1 (en) |
| CN (1) | CN106475520B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111545708B (en) * | 2020-05-12 | 2021-08-06 | 唐山昊中科技有限公司 | Negative-pressure casting process for precoated sand shell type iron sand |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB789769A (en) * | 1955-01-05 | 1958-01-29 | Austenal Lab Inc | Improvements in making casting molds |
| US3204303A (en) * | 1963-06-20 | 1965-09-07 | Thompson Ramo Wooldridge Inc | Precision investment casting |
| US3861449A (en) * | 1969-05-05 | 1975-01-21 | Howmet Corp | Method of casting metallic objects |
| JPS6027442A (en) * | 1983-07-22 | 1985-02-12 | Toshiba Corp | Casting mold |
| JPS63112041A (en) * | 1986-10-30 | 1988-05-17 | Mazda Motor Corp | Lost wax casting method |
| WO1999025511A1 (en) * | 1997-11-19 | 1999-05-27 | The Castings Development Centre | Investment casting |
| JP2003520134A (en) * | 1998-11-20 | 2003-07-02 | ロールス−ロイス・コーポレーション | Method and apparatus for manufacturing cast parts |
| US20080142186A1 (en) * | 1998-11-20 | 2008-06-19 | Frasier Donald J | Method and apparatus for production of a cast component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140087281A (en) | 2012-12-28 | 2014-07-09 | 재단법인 포항산업과학연구원 | A mold for investment casting and method for manufacturing thereof |
-
2015
- 2015-08-31 KR KR1020150122677A patent/KR101755832B1/en active IP Right Grant
- 2015-11-19 US US14/946,046 patent/US20170056969A1/en not_active Abandoned
- 2015-11-20 EP EP15195578.8A patent/EP3135399B1/en active Active
- 2015-11-26 CN CN201510845473.6A patent/CN106475520B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3135399A1 (en) | 2017-03-01 |
| CN106475520B (en) | 2021-02-09 |
| KR101755832B1 (en) | 2017-07-10 |
| KR20170026890A (en) | 2017-03-09 |
| US20170056969A1 (en) | 2017-03-02 |
| EP3135399B1 (en) | 2019-05-22 |
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