CN106623787A - Preparation method of aluminum alloy fusible mold precise casting and applied binding agent - Google Patents
Preparation method of aluminum alloy fusible mold precise casting and applied binding agent Download PDFInfo
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- CN106623787A CN106623787A CN201611239278.XA CN201611239278A CN106623787A CN 106623787 A CN106623787 A CN 106623787A CN 201611239278 A CN201611239278 A CN 201611239278A CN 106623787 A CN106623787 A CN 106623787A
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- core
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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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- 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
- B22C1/18—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 of inorganic agents
- B22C1/183—Sols, colloids or hydroxide gels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a preparation method of an aluminum alloy fusible mold precise casting and an applied binding agent. The binding agent is prepared by silica sol and Shangdian powder according to a mass ratio of 2.6-2.9: 1; and the preparation method of the casting mainly comprises preparation of a gypsum molding core, bonding of the gypsum molding core, low-temperature roasting, wax dipping, casting wax mold, layered coating hanging and high-temperature roasting, and formation of the aluminum alloy fusible mold precise casting after fusible mold pouring. The method adopts the binding agent prepared by the Shangdian powder and the silica sol, and solves the problems of low binding strength of the gypsum molding core after mold shell roasting and easy generation of slag inclusion and core deviation.
Description
Technical field
The invention belongs to aluminium alloy Melt casting technical field, is related to a kind of preparation of aluminium alloy Melt casting
Method；Further relate to the binding agent that said method is used.
Background technology
In aluminium alloy precision-investment casting, when foundry goods die cavity complexity, it is impossible to when being produced using conventional shell side method processed, generally
Produced with reference to model casting using independent coremaking.Because gypsum makes core strength height, later stage easy depoling and gypsum cost
It is low, therefore be the most widely used coremaking material of aluminium alloy precision-investment casting.Due to gypsum material own physical characteristic, firmly
Gypsum volumetric expansion during change, so plaster core is difficult depanning, plaster core mould is more based on loose piece structure, and structure is multiple
It is miscellaneous.If foundry goods cavity structure is complicated, plaster core mould cannot complete the making of overall core, during design, generally by core
Several parts are divided into, are then attached by appropriate binding agent, so as to form core for cast.
The conventional binding agent of plaster core is waterglass, but foaming easily occurs in later stage formwork roasting process in core, and
White sodium silicate solids, and bonded part low intensity, cause foundry goods to be scrapped the problems such as easily occur slag inclusion, core shift after casting pouring.
The content of the invention
It is an object of the invention to provide a kind of preparation method of aluminium alloy Melt casting, the method is using upper shop powder
With binding agent made by Ludox, solve that adhesion strength after plaster core formwork roasting is low, and the slag inclusion that easily occurs and core shift
Problem.
The present invention also aims to provide the binding agent used in said method.
The purpose of the present invention is achieved through the following technical solutions：
The preparation method of this aluminium alloy Melt casting, including
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding；
Step 2, by Ludox and upper shop powder with mass ratio as 2.6-2.9:1 is equipped with prepared binding agent, and binding agent is applied
In plaster core, branch is bondd, and is then stood and is air-dried, and obtains overall core；
Step 3, low-temperature bake 3h is carried out by overall core under 150-250 DEG C of environment, obtains the first overall core；
Step 4, the first overall core is placed in the paraffin of boiling, and waxdip 10-30min obtains waxdip after cooling
Overall core；
Step 5, by the overall core of waxdip casting wax mould is pressed into, and prepares the running channel needed for module, by the whole of waxdip
Build core carries out a group type with running channel, obtains the module of group type；
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed；
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and obtains formwork；
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
Further, of the invention the characteristics of, also resides in：
Stand wherein in step 2 and air-dry 1-2h.
High-temperature roasting wherein in step 12 is every 100 DEG C of insulation 1h that heat up, persistently overheating to after 730-750 DEG C, is incubated
2h。
Any surface finish of the casting wax mould wherein in step 5.
Unnecessary binding agent is removed after boning wherein in step 2.
Present invention also offers a kind of binding agent for above-mentioned preparation method, including Ludox and upper shop powder mixing system
Into wherein the mass ratio of Ludox and upper shop powder is 2.6-2.9：1, wherein upper shop powder is shop powder in 325 purposes.
The invention has the beneficial effects as follows：The binding agent prepared using upper shop powder and Ludox can improve plaster core module
Adhesion strength is low after roasting, the problem of slag inclusion and core shift, improves the qualification rate of casting finished products；And the binding agent manufacturing cost
It is low, prepare simple, in the production cost for reducing foundry goods preparation, while improve production efficiency and quality.
Specific embodiment
The present invention is described in further detail with reference to specific embodiment：
The invention provides a kind of preparation method of aluminium alloy Melt casting, comprises the following steps：
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding, and plaster core branch is repaired.
Step 2, by Ludox and upper shop powder with mass ratio as 2.6-2.9:1 is equipped with prepared binding agent, and binding agent is applied
In plaster core, branch is bondd, and removes unnecessary binding agent, is then stood and is air-dried 1-2h, obtains overall core.
Step 3, low-temperature bake 3h is carried out by overall core under 150-250 DEG C of environment, obtains the first overall core, while
Guarantee the first overall whose surfaces flawless, without misrun, impulse- free robustness.
Step 4, the first overall core is placed in the paraffin of boiling, waxdip 10-30min, to the first overall core without
Bubble is produced, and the overall core of waxdip is obtained after cooling.
Step 5, by the overall core of waxdip casting wax mould is pressed into, while repairing the surface of casting wax mould, it is ensured that surface
Quality is bright and clean；Then the running channel needed for module is prepared, the overall core of waxdip and running channel is carried out into a group type, obtain the mould of group type
Group, it is ensured that the mould of group type is without wax stream, no-welding-seam.
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed in dewaxing kettle.
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and detailed process is every 100 DEG C of insulation 1h that heat up, persistently overheating
To after 730-750 DEG C, 2h is incubated, formwork is obtained afterwards.
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
Present invention also offers the binding agent of the preparation method for aluminium alloy Melt casting, including Ludox and upper
Shop powder is mixed, and wherein the mass ratio of Ludox and upper shop powder is 2.6-2.9：1；Shop powder is wherein gone up for shop powder in 325 purposes.
The present invention specific embodiment be：
Embodiment 1
Certain h type engine h aluminium alloy castings is prepared, its detailed process is：
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding, and plaster core branch is repaired.
Step 2, by Ludox and upper shop powder with mass ratio as 2.65:1 is equipped with prepared binding agent, and binding agent is coated in into stone
Cream core branch is bondd, and removes unnecessary binding agent, is then stood and is air-dried 1h, obtains overall core.
Step 3, low-temperature bake 3h is carried out by overall core under 200 DEG C of environment, the first overall core is obtained, while guaranteeing
First overall whose surfaces flawless, without misrun, impulse- free robustness.
Step 4, the first overall core is placed in the paraffin of boiling, waxdip 10min, to the first overall core bubble-free
Produce, the overall core of waxdip is obtained after cooling.
Step 5, by the overall core of waxdip casting wax mould is pressed into, while repairing the surface of casting wax mould, it is ensured that surface
Quality is bright and clean；Then the running channel needed for module is prepared, the overall core of waxdip and running channel is carried out into a group type, obtain the mould of group type
Group, it is ensured that the mould of group type is without wax stream, no-welding-seam.
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed in dewaxing kettle,
Dewaxing parameter is 850 DEG C, and dewax 20min.
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and detailed process is every 100 DEG C of insulation 1h that heat up, persistently overheating
To after 750 DEG C, 2h is incubated, formwork is obtained afterwards.
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
After x-ray examination, Internal Quality of Cast reaches the like members standards of HB963 II to obtained foundry goods, hence it is evident that improve casting
The problems such as part slag inclusion inside, core shift.
Embodiment 2
Certain h type engine h aluminium alloy castings is prepared, its detailed process is：
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding, and plaster core branch is repaired.
Step 2, by Ludox and upper shop powder with mass ratio as 2.70:1 is equipped with prepared binding agent, and binding agent is coated in into stone
Cream core branch is bondd, and removes unnecessary binding agent, is then stood and is air-dried 1h, obtains overall core.
Step 3, low-temperature bake 3h is carried out by overall core under 200 DEG C of environment, the first overall core is obtained, while guaranteeing
First overall whose surfaces flawless, without misrun, impulse- free robustness.
Step 4, the first overall core is placed in the paraffin of boiling, waxdip 20min, to the first overall core bubble-free
Produce, the overall core of waxdip is obtained after cooling.
Step 5, by the overall core of waxdip casting wax mould is pressed into, while repairing the surface of casting wax mould, it is ensured that surface
Quality is bright and clean；Then the running channel needed for module is prepared, the overall core of waxdip and running channel is carried out into a group type, obtain the mould of group type
Group, it is ensured that the mould of group type is without wax stream, no-welding-seam.
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed in dewaxing kettle,
Dewaxing parameter is 850 DEG C, and dewax 20min.
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and detailed process is every 100 DEG C of insulation 1h that heat up, persistently overheating
To after 730 DEG C, 2h is incubated, formwork is obtained afterwards.
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
After x-ray examination, Internal Quality of Cast reaches the like members standards of HB963 II to obtained foundry goods, hence it is evident that improve casting
The problems such as part slag inclusion inside, core shift.
Embodiment 3
Certain h type engine h aluminium alloy castings is prepared, its detailed process is：
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding, and plaster core branch is repaired.
Step 2, by Ludox and upper shop powder with mass ratio as 2.60:1 is equipped with prepared binding agent, and binding agent is coated in into stone
Cream core branch is bondd, and removes unnecessary binding agent, is then stood and is air-dried 1h, obtains overall core.
Step 3, low-temperature bake 3h is carried out by overall core under 200 DEG C of environment, the first overall core is obtained, while guaranteeing
First overall whose surfaces flawless, without misrun, impulse- free robustness.
Step 4, the first overall core is placed in the paraffin of boiling, waxdip 30min, to the first overall core bubble-free
Produce, the overall core of waxdip is obtained after cooling.
Step 5, by the overall core of waxdip casting wax mould is pressed into, while repairing the surface of casting wax mould, it is ensured that surface
Quality is bright and clean；Then the running channel needed for module is prepared, the overall core of waxdip and running channel is carried out into a group type, obtain the mould of group type
Group, it is ensured that the mould of group type is without wax stream, no-welding-seam.
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed in dewaxing kettle,
Dewaxing parameter is 850 DEG C, and dewax 20min.
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and detailed process is every 100 DEG C of insulation 1h that heat up, persistently overheating
To after 740 DEG C, 2h is incubated, formwork is obtained afterwards.
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
After x-ray examination, Internal Quality of Cast reaches the like members standards of HB963 II to obtained foundry goods, hence it is evident that improve casting
The problems such as part slag inclusion inside, core shift.
Embodiment 4
Certain h type engine h aluminium alloy castings is prepared, its detailed process is：
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding, and plaster core branch is repaired.
Step 2, by Ludox and upper shop powder with mass ratio as 2.80:1 is equipped with prepared binding agent, and binding agent is coated in into stone
Cream core branch is bondd, and removes unnecessary binding agent, is then stood and is air-dried 1h, obtains overall core.
Step 3, low-temperature bake 3h is carried out by overall core under 200 DEG C of environment, the first overall core is obtained, while guaranteeing
First overall whose surfaces flawless, without misrun, impulse- free robustness.
Step 4, the first overall core is placed in the paraffin of boiling, waxdip 15min, to the first overall core bubble-free
Produce, the overall core of waxdip is obtained after cooling.
Step 5, by the overall core of waxdip casting wax mould is pressed into, while repairing the surface of casting wax mould, it is ensured that surface
Quality is bright and clean；Then the running channel needed for module is prepared, the overall core of waxdip and running channel is carried out into a group type, obtain the mould of group type
Group, it is ensured that the mould of group type is without wax stream, no-welding-seam.
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed in dewaxing kettle,
Dewaxing parameter is 850 DEG C, and dewax 20min.
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and detailed process is every 100 DEG C of insulation 1h that heat up, persistently overheating
To after 745 DEG C, 2h is incubated, formwork is obtained afterwards.
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
After x-ray examination, Internal Quality of Cast reaches the like members standards of HB963 II to obtained foundry goods, hence it is evident that improve casting
The problems such as part slag inclusion inside, core shift.
Embodiment 5
Certain h type engine h aluminium alloy castings is prepared, its detailed process is：
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and being formed needs
The plaster core branch of bonding, and plaster core branch is repaired.
Step 2, by Ludox and upper shop powder with mass ratio as 2.90:1 is equipped with prepared binding agent, and binding agent is coated in into stone
Cream core branch is bondd, and removes unnecessary binding agent, is then stood and is air-dried 1h, obtains overall core.
Step 3, low-temperature bake 3h is carried out by overall core under 200 DEG C of environment, the first overall core is obtained, while guaranteeing
First overall whose surfaces flawless, without misrun, impulse- free robustness.
Step 4, the first overall core is placed in the paraffin of boiling, waxdip 25min, to the first overall core bubble-free
Produce, the overall core of waxdip is obtained after cooling.
Step 5, by the overall core of waxdip casting wax mould is pressed into, while repairing the surface of casting wax mould, it is ensured that surface
Quality is bright and clean；Then the running channel needed for module is prepared, the overall core of waxdip and running channel is carried out into a group type, obtain the mould of group type
Group, it is ensured that the mould of group type is without wax stream, no-welding-seam.
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed in dewaxing kettle,
Dewaxing parameter is 850 DEG C, and dewax 20min.
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and detailed process is every 100 DEG C of insulation 1h that heat up, persistently overheating
To after 750 DEG C, 2h is incubated, formwork is obtained afterwards.
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
After x-ray examination, Internal Quality of Cast reaches the like members standards of HB963 II to obtained foundry goods, hence it is evident that improve casting
The problems such as part slag inclusion inside, core shift.
Claims (7)
1. a kind of preparation method of aluminium alloy Melt casting, it is characterised in that include
Step 1, is 3 using land plaster and water quality ratio：The prepared gypsum of 1 proportioning is recorded and obtains core mold, and formation needs bonding
Plaster core branch；
Step 2, by Ludox and upper shop powder with mass ratio as 2.6-2.9:1 is equipped with prepared binding agent, and binding agent is coated in into stone
Cream core branch is bondd, and is then stood and is air-dried, and obtains overall core；
Step 3, low-temperature bake 3h is carried out by overall core under 150-250 DEG C of environment, obtains the first overall core；
Step 4, the first overall core is placed in the paraffin of boiling, and waxdip 10-30min obtains the entirety of waxdip after cooling
Core；
Step 5, by the overall core of waxdip casting wax mould is pressed into, and prepares the running channel needed for module, by the monolithic devices of waxdip
Core carries out a group type with running channel, obtains the module of group type；
Step 6, carries out layering and is coated with using slurry and floor sand to the module of group type, is then dewaxed；
Step 7, by the formwork after dewaxing high-temperature roasting is carried out, and obtains formwork；
Step 8, fusible pattern cast is carried out to formwork, forms foundry goods.
2. the preparation method of aluminium alloy Melt casting according to claim 1, it is characterised in that in the step 2
Stand and air-dry 1-2h.
3. the preparation method of aluminium alloy Melt casting according to claim 1, it is characterised in that in the step 12
High-temperature roasting be it is every heat up 100 DEG C insulation 1h, it is persistently overheating to after 730-750 DEG C, be incubated 2h.
4. the preparation method of the aluminium alloy Melt casting according to claim 1-3 any one, it is characterised in that institute
State any surface finish of the casting wax mould in step 5.
5. the preparation method of the aluminium alloy Melt casting according to claim 1-3 any one, it is characterised in that institute
State in step 2 and remove unnecessary binding agent after bonding.
6. a kind of binding agent of the preparation method of the aluminium alloy Melt casting for described in claim 1, it is characterised in that
It is mixed including Ludox and upper shop powder, wherein the mass ratio of Ludox and upper shop powder is 2.6-2.9：1.
7. binding agent according to claim 6, it is characterised in that the upper shop powder is shop powder in 325 purposes.
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| CN201611239278.XA CN106623787B (en) | 2016-12-28 | 2016-12-28 | A kind of preparation method of aluminium alloy Melt casting and its binder used |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790633A (en) * | 2017-11-14 | 2018-03-13 | 蚌埠市嘉实机电设备制造有限公司 | A kind of aluminum alloy doors and windows precision-investment casting process |
| CN110860658A (en) * | 2019-12-03 | 2020-03-06 | 中国船舶重工集团公司第十二研究所 | Preparation method of wax mold gypsum core of cylindrical thin-wall complex component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107790633A (en) * | 2017-11-14 | 2018-03-13 | 蚌埠市嘉实机电设备制造有限公司 | A kind of aluminum alloy doors and windows precision-investment casting process |
| CN110860658A (en) * | 2019-12-03 | 2020-03-06 | 中国船舶重工集团公司第十二研究所 | Preparation method of wax mold gypsum core of cylindrical thin-wall complex component |
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| CN106623787B (en) | 2019-03-26 |
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Address after: 710021 Fengcheng 7th Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee after: Xi'an Supercrystalline Technology Co.,Ltd. Address before: 710021 Fengcheng 7th Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: XI'AN SUPERCRYSYAL SCI-TECH DEVELOPMENT Co.,Ltd. |
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Address after: 710299 No. 10, East Section of Jinggao North Road, Jingwei New City, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee after: Xi'an Supercrystalline Technology Co.,Ltd. Address before: 710021 Fengcheng 7th Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: Xi'an Supercrystalline Technology Co.,Ltd. |
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