CN109482817A - A method of outer support is manufactured using lost foam process - Google Patents
A method of outer support is manufactured using lost foam process Download PDFInfo
- Publication number
- CN109482817A CN109482817A CN201811423369.8A CN201811423369A CN109482817A CN 109482817 A CN109482817 A CN 109482817A CN 201811423369 A CN201811423369 A CN 201811423369A CN 109482817 A CN109482817 A CN 109482817A
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- CN
- China
- Prior art keywords
- outer support
- lost foam
- foam process
- coating
- dip
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- 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.)
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The present invention relates to outer support manufacturing method technical fields, provide a kind of method using lost foam process manufacture outer support, include the following steps: first step group mould, the white mould of the outer support is adhered in running gate system；Cold glue is used when cross gate is Nian Jie with Bai Mo；Second step dip-coating, the apperance after organizing mould carry out 3~5 dip-coatings, are dried after each dip-coating；Third step buries case, and the apperance by multiple dip-coating and after drying is put into sandbox；Plus sand and jolt ramming then；4th step vacuum-assist pouring will bury the sandbox after case and connect negative pressure equipment, is then poured；The cleaning of 5th step；6th step antirust.Whereby, the present invention passes through group mould, a dip-coating, buries case, vacuum-assist pouring, cleaning and antirust, final that qualified blank is made.Core setting is eliminated using lost foam process, while burying case with sand is dry sand without using bonding agent, therefore is greatly saved cost.
Description
Technical field
The present invention relates to outer support manufacturing method technical fields more particularly to a kind of use lost foam process to manufacture outer support
Method.
Background technique
The manufacturing method of engine component is substantially that first cast blank is machined again at present.Most of components
Type that supplier is processed and various in style, the shape and structure of many products is complicated in addition, such as outer support, using common sand
Casting process need to usually use two fuses.It increases manufacturing cost.Therefore many manufacturers select production chains on rough-cast
Lost foam process that is higher and being not necessarily to lower core.
Lost foam casting is also referred to as model casting, is that bubbles model similar with casting dimension shape bonding is combined into model
Cluster is embedded in vibration molding in drystone sand, is poured under negative pressure, model is made to gasify after brushing fireproof coating and drying, liquid gold
Category occupies modal position, and the novel casting method of casting is formed after solidification is cooling.It is current casting technique state-of-the-art in the world
One of, it is known as 21 century Green foundry.Therefore coating be blended and hang painting be casting product quality important guarantee.
In summary, the existing technology has inconveniences and defects in actual use, so it is necessary to be improved.
Summary of the invention
For above-mentioned defect, the purpose of the present invention is to provide a kind of sides using lost foam process manufacture outer support
Method by a group mould, dip-coating, buries case, vacuum-assist pouring, cleaning and antirust, final that qualified blank is made.Exempted from using lost foam process
Core setting is removed, while burying case with sand is dry sand without using bonding agent, therefore is greatly saved cost.
To achieve the goals above, the present invention provides a kind of method using lost foam process manufacture outer support, including the
One step group mould
The white mould of the outer support is adhered in running gate system；Running gate system includes a sprue, and sprue is by upper
It sets lower bifurcation and goes out several cross gates, each cross gate is bonded a white mould；The quantity for the cross gate being arranged on sprue be 4~
8；Cold glue is used when cross gate is Nian Jie with Bai Mo；
Second step dip-coating
It prepares and the Baume degrees of adjusting coating is 60~70；
Apperance after group mould is subjected to 3~5 dip-coatings, drying is carried out after each dip-coating and drying temperature is 40~50 DEG C；
Third step buries case
Layer of sand after being pre-placed 10~15cm in empty sandbox；Apperance by multiple dip-coating and after drying is put into sandbox
In；Plus sand and jolt ramming then；The time of jolt ramming is no less than 40 seconds；
4th step vacuum-assist pouring
The sandbox after case will be buried and connect negative pressure equipment；Adjusting the suction strength in sandbox is -0.04~-0.06MPa, then
It is poured；The dwell time is no less than 20 minutes after casting, and suction strength when pressure maintaining is -0.02~-0.04MPa；
The cleaning of 5th step
Running gate system, ball blast and polishing burr are poured out from sandbox and be removed to casting after cooling；
6th step antirust
Casting after cleaning carries out spray antirust paint or dips in antirust oil.
Method according to the present invention using lost foam process manufacture outer support, the number for the cross gate being arranged on the running channel
Amount is 5 or 6.
Method according to the present invention using lost foam process manufacture outer support, the Baume of the second step dip-coating coating
Degree is 64~67.
Method according to the present invention using lost foam process manufacture outer support, the drying temperature are 45~49 DEG C.
Method according to the present invention using lost foam process manufacture outer support, the sand injection manner that the third step buries case are
Rain type adds sand.
Method according to the present invention using lost foam process manufacture outer support, the third step bury the time of the jolt ramming of case
It is 40~60 seconds.
Method according to the present invention using lost foam process manufacture outer support, the third step bury the grain of sand used in case
Degree is 40~70 mesh.
Method according to the present invention using lost foam process manufacture outer support, when the pressure maintaining of the 4th step vacuum-assist pouring
Between be 20~40 minutes.
Method according to the present invention using lost foam process manufacture outer support, the ball blast time of the 5th step cleaning is
2~4 minutes.
Method according to the present invention using lost foam process manufacture outer support, the ball blast number that the 5th step is cleared up are
Twice.
The purpose of the present invention is to provide it is a kind of using lost foam process manufacture outer support method, by a group mould, dip-coating,
Case, vacuum-assist pouring, cleaning and antirust are buried, it is final that qualified blank is made.Core setting is eliminated using lost foam process, simultaneously
It is dry sand without using bonding agent that case, which is buried, with sand, therefore is greatly saved cost.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The present invention provides a kind of methods using lost foam process manufacture outer support comprising following steps:
First step group mould
The white mould of the outer support is adhered in running gate system；Running gate system includes a sprue, and sprue is by upper
It sets lower bifurcation and goes out several cross gates, each cross gate is bonded a white mould；According to the specification of product and the size of sandbox, often
The quantity for the cross gate being arranged on a sprue can be 4~8.The present invention preferably 5 or 6.Cross gate is Nian Jie with Bai Mo
When hot melt adhesive or cold glue can be used, the small cold glue of the preferred gas forming amount of the present invention is bonded.
Second step dip-coating
It prepares and the Baume degrees of adjusting coating is 60~70；The present invention preferably 64~67.The stream of coating under this Baume degrees
The relationship of dynamic property and viscosity is best.
Apperance after group mould is subjected to 3~5 dip-coatings, is dried after each dip-coating.To ensure drying effect, drying temperature
Degree is not less than 40 DEG C.Temperature height is conducive to drying effect, but excessively high temperature will also result in white moding shape, therefore drying temperature is
40~50 DEG C, preferably 45~48 DEG C of the present invention.
Third step buries case
Layer of sand after being pre-placed 10~15cm in empty sandbox；Apperance by multiple dip-coating and after drying is put into sandbox
In；Plus sand and jolt ramming then.
To avoid sand grains concentration from falling, the damage of apperance is caused, it is preferred that sand injection manner of the present invention adds for rain type
Sand.
Preferably, the granularity of sand used is 40~70 mesh, has enough gaps after sand jolt ramming between sand grains, subsequent
Casting process in, white mould gas can be extracted out smoothly from sandbox after gasification, it is ensured that the quality of casting.
To enable the abundant jolt ramming of sand, the time of jolt ramming is no less than 40 seconds, but excessive time of vibration has and causes apperance
The risk of deformation.The present invention preferred jolt ramming time is 40~60 seconds.
4th step vacuum-assist pouring
The sandbox after case will be buried and connect negative pressure equipment；Adjusting the suction strength in sandbox is -0.04~-0.06MPa, then
It is poured；The dwell time is no less than 20 minutes after casting, and suction strength when pressure maintaining is -0.02~-0.04MPa.It is enough
Dwell time crush defect can occur to avoid casting in the case where liquid.But prolonged pressure maintaining increases the operation of equipment
Time is to increase cost, therefore the present invention preferred dwell time is 20~40 minutes.
The cleaning of 5th step
Running gate system, ball blast and polishing burr are poured out from sandbox and be removed to casting after cooling.
Preferably, the ball blast time is 2~4 minutes, and ball blast number is twice.Make the coating for being adhered to cast(ing) surface and sand
Grain can adequately be got rid of.
6th step antirust
Casting after cleaning carries out spray antirust paint or dips in antirust oil, and casting is avoided to corrode in storing process.
In conclusion passing through the purpose of the present invention is to provide a kind of method using lost foam process manufacture outer support
Case, vacuum-assist pouring, cleaning and antirust are buried in group mould, dip-coating, final that qualified blank is made.It is eliminated down using lost foam process
Core process, while burying case with sand is dry sand without using bonding agent, therefore is greatly saved cost.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding changes and modifications, but these corresponding changes and change in accordance with the present invention
Shape all should fall within the scope of protection of the appended claims of the present invention.
Claims (10)
1. a kind of method using lost foam process manufacture outer support, which comprises the steps of:
First step group mould
The white mould of the outer support is adhered in running gate system；Running gate system includes a sprue, and sprue is set down from above
Bifurcated goes out several cross gates, each cross gate is bonded a white mould；The quantity for the cross gate being arranged on sprue is 4~8；
Cold glue is used when cross gate is Nian Jie with Bai Mo；
Second step dip-coating
It prepares and the Baume degrees of adjusting coating is 60~70；
Apperance after group mould is subjected to 3~5 dip-coatings, drying is carried out after each dip-coating and drying temperature is 40~50 DEG C；
Third step buries case
Layer of sand after being pre-placed 10~15cm in empty sandbox；Apperance by multiple dip-coating and after drying is put into sandbox；
Plus sand and jolt ramming then；The time of jolt ramming is no less than 40 seconds；
4th step vacuum-assist pouring
The sandbox after case will be buried and connect negative pressure equipment；The suction strength adjusted in sandbox is -0.04~-0.06MPa, is then carried out
Casting；The dwell time is no less than 20 minutes after casting, and suction strength when pressure maintaining is -0.02~-0.04MPa；
The cleaning of 5th step
Running gate system, ball blast and polishing burr are poured out from sandbox and be removed to casting after cooling；
6th step antirust
Casting after cleaning carries out spray antirust paint or dips in antirust oil.
2. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that on the running channel
The quantity of the cross gate of setting is 5 or 6.
3. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the second step
The Baume degrees of dip-coating coating is 64~67.
4. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the drying temperature
Degree is 45~49 DEG C.
5. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the third step
The sand injection manner for burying case is that rain type adds sand.
6. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the third step
The time for burying the jolt ramming of case is 40~60 seconds.
7. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the third step
The granularity for burying sand used in case is 40~70 mesh.
8. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the 4th step
The dwell time of vacuum-assist pouring is 20~40 minutes.
9. the method according to claim 1 using lost foam process manufacture outer support, which is characterized in that the 5th step
The ball blast time of cleaning is 2~4 minutes.
10. the method according to claim 9 using lost foam process manufacture outer support, which is characterized in that the described 5th
The ball blast number of step cleaning is twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811423369.8A CN109482817A (en) | 2018-11-27 | 2018-11-27 | A method of outer support is manufactured using lost foam process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811423369.8A CN109482817A (en) | 2018-11-27 | 2018-11-27 | A method of outer support is manufactured using lost foam process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109482817A true CN109482817A (en) | 2019-03-19 |
Family
ID=65697555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811423369.8A Pending CN109482817A (en) | 2018-11-27 | 2018-11-27 | A method of outer support is manufactured using lost foam process |
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| CN (1) | CN109482817A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778491A (en) * | 2004-11-18 | 2006-05-31 | 黄刚 | Method for eliminating defects of sand penetration and carbon black in water and oil paths in casts of automotive crank case |
| CN103789605A (en) * | 2014-02-19 | 2014-05-14 | 恒天重工股份有限公司 | Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device |
| CN104353782A (en) * | 2014-10-27 | 2015-02-18 | 无锡乐华自动化科技有限公司 | Lost foam casting process of high-manganese steel sieve plate |
| CN105458167A (en) * | 2015-12-07 | 2016-04-06 | 兴化市雅兰机械制造有限公司 | Large hub lost foam casting technology |
| CN105598419A (en) * | 2016-01-06 | 2016-05-25 | 洛阳市致力新材料有限公司 | Combined casting process of evanescent mode produced hammer head |
-
2018
- 2018-11-27 CN CN201811423369.8A patent/CN109482817A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778491A (en) * | 2004-11-18 | 2006-05-31 | 黄刚 | Method for eliminating defects of sand penetration and carbon black in water and oil paths in casts of automotive crank case |
| CN103789605A (en) * | 2014-02-19 | 2014-05-14 | 恒天重工股份有限公司 | Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device |
| CN104353782A (en) * | 2014-10-27 | 2015-02-18 | 无锡乐华自动化科技有限公司 | Lost foam casting process of high-manganese steel sieve plate |
| CN105458167A (en) * | 2015-12-07 | 2016-04-06 | 兴化市雅兰机械制造有限公司 | Large hub lost foam casting technology |
| CN105598419A (en) * | 2016-01-06 | 2016-05-25 | 洛阳市致力新材料有限公司 | Combined casting process of evanescent mode produced hammer head |
Non-Patent Citations (1)
| Title |
|---|
| 孟兆亚等: "灰铸铁飞轮壳体消失模铸造工艺", 《铸造技术》 * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190319 |
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| RJ01 | Rejection of invention patent application after publication |