CN107282888A - The sand mould casting method of high-precision rod failure ball valve core - Google Patents
The sand mould casting method of high-precision rod failure ball valve core Download PDFInfo
- Publication number
- CN107282888A CN107282888A CN201710611880.XA CN201710611880A CN107282888A CN 107282888 A CN107282888 A CN 107282888A CN 201710611880 A CN201710611880 A CN 201710611880A CN 107282888 A CN107282888 A CN 107282888A
- Authority
- CN
- China
- Prior art keywords
- casting
- shell
- ball valve
- valve core
- sand mould
- 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.)
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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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of sand mould casting method of high-precision rod failure ball valve core, comprise the following steps：Meltability model is made of fusible material, is put into investment-casting, if in the special fireproof coating of coating dried layer thereon, melting model from shell after drying and hardening forms an overall shell, then with steam or warm water, then shell being placed in sandbox.By the above-mentioned means, the present invention improves cast(ing) surface smoothness and precision, improves the qualification rate and production efficiency of casting, casting cost is reduced.
Description
Technical field
The present invention relates to valve body processing technique field, more particularly to a kind of sand casting side of high-precision rod failure ball valve core
Method.
Background technology
Sand casting is the casting method that casting is produced in molding sand.Steel, iron and most of non-ferrous alloy castings all can use
The method of sand casting is obtained.Modeling Material used in sand casting is cheap and easy to get, and Casting mold manufacturing is easy, and the single-piece to casting is given birth to
Produce, produce by batch and largely produce and adapt to, be always the basic technology in Foundry Production for a long time.Sand casting
Technical process includes：Make wooden model-molding modeling-fusing-cast-knockout-and go dead head cleaning-inspection storage.
Casting mold used in sand casting is typically combined by outer sand mold and core.The basic raw material for manufacturing sand mold is casting model powder and type
Sandbinder.Liquid metal is full of casting mold die cavity, obtains the ability of complete, the clear-cut casting of shape, referred to as liquid metal
Mold-filling capacity.The mold-filling capacity of molten metal is dependent firstly on the fluid ability of metal in itself, while again by external condition, such as
The influence of the factors such as casting mold property, pouring condition, casting structure.In sand casting, die cavity inner surface can have one to molten metal
Fixed resistance, influences the filling velocity of molten metal；Casting mold and metal intensity of heat exchange influence molten metal keep flowing when
Between.Especially at narrow, thin, the thin passage of casting mold, the contact area of molten metal and casting mold is relatively large, and heat, which scatters and disappears, to be compared
It hurry up, the cooling gradient of molten metal is big, molten metal is easy to solidification, mold-filling capacity reduction here.The mold-filling capacity of molten metal is weak,
Then there may be the defects such as misrun, cold shut, sand holes, splashings, lift case, and Entrapped Gas Hole, burning into sand.Therefore, how to improve
The mold-filling capacity of molten metal in sand casting process, is the technical problem that those skilled in the art are badly in need of solving at present.
The content of the invention
The present invention solves the technical problem of：Improve cast(ing) surface smoothness and precision, the conjunction for improving casting
Lattice rate and production efficiency, reduce casting cost.
In order to solve the above technical problems, one aspect of the present invention is：A kind of high-precision rod failure ball valve is provided
The sand mould casting method of core, comprises the following steps：Meltability model is made of fusible material, is put into investment-casting, thereon
If the special fireproof coating of coating dried layer, after drying and hardening forms an overall shell, then with steam or warm water from type
Melt model in shell, then shell is placed in sandbox, fill dry moulding in its surrounding, casting mold is finally put into infiltration roaster
Middle process high-temperature roasting, during using high intensity shell, it may not be necessary to moulding and by the shell roasting direct after the demoulding, casting mold or shell
After fired, casting is obtained in wherein casting molten metal.
In a preferred embodiment of the present invention, the temperature in the roaster is 1000 °.
In a preferred embodiment of the present invention, the fusible material is copper alloy or plastics.
In a preferred embodiment of the present invention, the investment-casting dimensional accuracy is CT4-6.
The beneficial effects of the invention are as follows：Improve cast(ing) surface smoothness and precision, the qualification rate for improving casting and life
Efficiency is produced, casting cost is reduced.
Embodiment
It is described in detail with reference to presently preferred embodiments of the present invention, so that advantages and features of the invention can be more easy to
In being readily appreciated by one skilled in the art, apparent clearly defined so as to be made to protection scope of the present invention.
Embodiment one
A kind of sand mould casting method of high-precision rod failure ball valve core, comprises the following steps：Comprise the following steps：The fusible material system of using
Into meltability model, it is put into investment-casting, if in the special fireproof coating of coating dried layer thereon, being formed by drying and hardening
After one overall shell, then with steam or warm water melt model from shell, then shell is placed in sandbox, filled out in its surrounding
Fill dry moulding, finally by casting mold put infiltration roaster in pass through high-temperature roasting, during using high intensity shell, it may not be necessary to moulding and
By the shell roasting direct after the demoulding, casting mold or shell it is fired after, obtain casting in wherein casting molten metal.
Further illustrate, the temperature in the roaster be 1000 °, the fusible material be copper alloy or plastics, it is described
Investment-casting dimensional accuracy is CT4-6.
During fusible pattern injection, using the highly polished die mould of mold cavity surface, therefore, the surface smoothness of fusible pattern is also higher.
In addition, the fireproof coating that shell is configured to by resistant to elevated temperatures special binders and refractory material applies and hangs on fusible pattern and be made, with
The die cavity inner surface that molten metal is directly contacted is highly polished.The principle of casting process selection：1st, sand casting is preferentially used, it is main
To want reason be sand casting low than other casting method costs, simple production process, with short production cycle.When wet type can not be met
It is required that when consider further that using clay-bonded sand surface drying sand mold, dry sand mold or other sand molds.The casting weight of clay green-sand casting can be from
Several kilograms until tens kilograms, and clay dry type production casting can weigh tens tons.2nd, casting method should be with production batch phase
Adapt to.The casting methods such as low pressure casting, die casting, centrifugal casting, it is expensive because of equipment and mold, so it is raw to be only suitable for batch
Production.3rd, formative method should be adapted to factory condition.The casting such as being equally production Large Machine Body, typically using cored-up mould
Method, does not make apperance and sandbox, and core is organized in melt pit；And other factory then uses box moulding method, apperance is made.Different
Enterprise's working condition（Including equipment, place, employee quality etc.）, production custom, the experience that is accumulated it is each different, it should according to
These conditions consider to be adapted to do what product and be not suitable for（Or can not）Any product done.4th, the required precision of casting is taken into account
And cost.The characteristics of Foundry Production, Foundry Production was the characteristics of have different from other techniques, mainly wide adaptability, need to material and
Equipment is more, pollution environment.Foundry Production can produce the pollution of dust, pernicious gas and Noise upon Environment, compared with other machinery systems
Make technique and come even more serious, it is necessary to take measures to be controlled.The trend of Castings Development be requirement casting have preferably it is comprehensive
Close performance, higher precision, less surplus and brighter and cleaner surface.In addition, the requirement of energy-conservation and society are to recovering nature ring
The cry in border also more and more higher.To adapt to these requirements, new casting alloy will be developed, and novel process for smelting and new equipment will
It is corresponding to occur.The automatic and mechanical degree of Foundry Production more will be sent out while improving constantly in terms of flexible production
Exhibition, to expand the adaptability to different batches and multi-item production.Saving the new technology of the energy and raw material will obtain preferentially
Development, few new technology new equipment for producing or not producing pollution will be first subjected to attention.
Present invention is disclosed a kind of sand mould casting method of high-precision rod failure ball valve core, improve cast(ing) surface smoothness and
Precision, the qualification rate and production efficiency for improving casting, reduce casting cost.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (4)
1. a kind of sand mould casting method of high-precision rod failure ball valve core, it is characterised in that：Comprise the following steps：The fusible material system of using
Into meltability model, it is put into investment-casting, if in the special fireproof coating of coating dried layer thereon, being formed by drying and hardening
After one overall shell, then with steam or warm water melt model from shell, then shell is placed in sandbox, filled out in its surrounding
Fill dry moulding, finally by casting mold put infiltration roaster in pass through high-temperature roasting, during using high intensity shell, it may not be necessary to moulding and
By the shell roasting direct after the demoulding, casting mold or shell it is fired after, obtain casting in wherein casting molten metal.
2. the sand mould casting method of high-precision rod failure ball valve core according to claim 1, it is characterised in that：The roaster
In temperature be 1000 °.
3. the sand mould casting method of high-precision rod failure ball valve core according to claim 1, it is characterised in that：The meltable material
Expect for copper alloy or plastics.
4. the sand mould casting method of high-precision rod failure ball valve core according to claim 1, it is characterised in that：The fusible pattern casting
Part dimensional accuracy is CT4-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611880.XA CN107282888A (en) | 2017-07-25 | 2017-07-25 | The sand mould casting method of high-precision rod failure ball valve core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611880.XA CN107282888A (en) | 2017-07-25 | 2017-07-25 | The sand mould casting method of high-precision rod failure ball valve core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107282888A true CN107282888A (en) | 2017-10-24 |
Family
ID=60102627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710611880.XA Pending CN107282888A (en) | 2017-07-25 | 2017-07-25 | The sand mould casting method of high-precision rod failure ball valve core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107282888A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296445A (en) * | 2018-03-08 | 2018-07-20 | 江苏飞鹿重工机械制造有限公司 | A kind of process for manufacturing cast article and casting die |
| CN110666108A (en) * | 2019-10-21 | 2020-01-10 | 贵州安吉航空精密铸造有限责任公司 | Casting formwork boxing roasting process |
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| CN1817504A (en) * | 2006-03-07 | 2006-08-16 | 陈福文 | Production of precisioning-cast mould |
| CN101362187A (en) * | 2008-09-03 | 2009-02-11 | 湖北省丹江口丹传汽车传动轴有限公司 | Investment casting method |
| JP2009279647A (en) * | 2008-05-21 | 2009-12-03 | Taiyo Machinery Co Ltd | Evaporative pattern casting apparatus |
| CN102699279A (en) * | 2012-07-02 | 2012-10-03 | 安徽应流铸业有限公司 | Large-size impeller processing technique in precise casting |
| CN102744367A (en) * | 2012-07-17 | 2012-10-24 | 武汉工程大学 | Lost foam-shell mold casting vibration and solidification method based on foam mold |
| CN103111585A (en) * | 2013-02-04 | 2013-05-22 | 中国兵器工业第五九研究所 | Method for preparing ceramic gypsum composite mould by using magnesium alloy |
| CN103949587A (en) * | 2014-05-14 | 2014-07-30 | 哈尔滨工业大学 | Preparation method of casting mold for reducing casting stress of large abrupt wall thickness type nickel-base superalloy casting obtained by anti-gravity casting |
| CN104399891A (en) * | 2014-11-27 | 2015-03-11 | 温州兰理工科技园有限公司 | Casting method combining investment precise shell-making process with vacuum suction molding technology |
| CN104972066A (en) * | 2015-06-15 | 2015-10-14 | 江苏万恒铸业有限公司 | Thin-shell sand culturing casting simple technology |
| CN106424562A (en) * | 2016-09-29 | 2017-02-22 | 广西大学 | Precision investment casting method eliminating shrinkage cavities and porosity defects |
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2017
- 2017-07-25 CN CN201710611880.XA patent/CN107282888A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817504A (en) * | 2006-03-07 | 2006-08-16 | 陈福文 | Production of precisioning-cast mould |
| JP2009279647A (en) * | 2008-05-21 | 2009-12-03 | Taiyo Machinery Co Ltd | Evaporative pattern casting apparatus |
| CN101362187A (en) * | 2008-09-03 | 2009-02-11 | 湖北省丹江口丹传汽车传动轴有限公司 | Investment casting method |
| CN102699279A (en) * | 2012-07-02 | 2012-10-03 | 安徽应流铸业有限公司 | Large-size impeller processing technique in precise casting |
| CN102744367A (en) * | 2012-07-17 | 2012-10-24 | 武汉工程大学 | Lost foam-shell mold casting vibration and solidification method based on foam mold |
| CN103111585A (en) * | 2013-02-04 | 2013-05-22 | 中国兵器工业第五九研究所 | Method for preparing ceramic gypsum composite mould by using magnesium alloy |
| CN103949587A (en) * | 2014-05-14 | 2014-07-30 | 哈尔滨工业大学 | Preparation method of casting mold for reducing casting stress of large abrupt wall thickness type nickel-base superalloy casting obtained by anti-gravity casting |
| CN104399891A (en) * | 2014-11-27 | 2015-03-11 | 温州兰理工科技园有限公司 | Casting method combining investment precise shell-making process with vacuum suction molding technology |
| CN104972066A (en) * | 2015-06-15 | 2015-10-14 | 江苏万恒铸业有限公司 | Thin-shell sand culturing casting simple technology |
| CN106424562A (en) * | 2016-09-29 | 2017-02-22 | 广西大学 | Precision investment casting method eliminating shrinkage cavities and porosity defects |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296445A (en) * | 2018-03-08 | 2018-07-20 | 江苏飞鹿重工机械制造有限公司 | A kind of process for manufacturing cast article and casting die |
| CN110666108A (en) * | 2019-10-21 | 2020-01-10 | 贵州安吉航空精密铸造有限责任公司 | Casting formwork boxing roasting process |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171024 |
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| WD01 | Invention patent application deemed withdrawn after publication |