CN107470566A - Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect - Google Patents
Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect Download PDFInfo
- Publication number
- CN107470566A CN107470566A CN201710876314.1A CN201710876314A CN107470566A CN 107470566 A CN107470566 A CN 107470566A CN 201710876314 A CN201710876314 A CN 201710876314A CN 107470566 A CN107470566 A CN 107470566A
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- Prior art keywords
- vent groove
- air discharge
- discharge duct
- annular vent
- linear air
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- 230000007547 defect Effects 0.000 title claims abstract description 28
- 238000010120 permanent mold casting Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 5
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 28
- 238000007493 shaping process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000005058 metal casting Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
A kind of method and sand core structure for reducing permanent mold casting thin-wall case flange turning position gas hole defect, it is characterized in that：Annular vent groove is opened up in the nearly ring flange end of sand core head（1）, while opening up annular vent groove（1）Sand core head proximal end face circumference on the axial linear air discharge duct that opens up（2）, axial linear air discharge duct（2）With annular vent groove（1）Connection；Wherein, annular vent groove（1）Play gas collection, axial linear air discharge duct（2）Form the passage being outwards vented；So as to strengthen ring flange turning position exhaust capacity and then reduce the gas hole defect at this position.Exhaust effect of the present invention is notable, and it is notable to eliminate the effect of gas hole defect, simple and easy, has good Technical Economy.
Description
Technical field
The invention belongs to Founding moldability technology field, is related in a kind of especially a kind of permanent mold casting of sand core structure and uses
Sand core structure, specifically it is a kind of reduce permanent mold casting thin-wall case flange turning position gas hole defect method and sand
Cored structure.
Background technology
Permanent mold casting, as the term suggests i.e. using the metal material such as manufacture such as cast iron, cast steel casting mold（Core）, under gravity will
The molten metal of melting pours into the process that casting mold obtains casting.Permanent mold casting, there is casting mold may be reused, be formed thereby
The features such as mechanical castings are high, it is widely used in the shaping of the non-ferrous castings such as aluminium, magnesium.However, metal mold is relative
Its poor air permeability for sand mold, therefore the gas hole defect of Metal mould casting is more prominent.For this problem, currently used side
Method mainly has following two aspects.First, increasing exhaust rising head at casting final set position, or increase exhaust on casting mold
Hole simultaneously configures corresponding venting plug, or even further connects various exhaust apparatus etc. at steam vent simultaneously；Second, with
Core substituted metal core, while strengthen its exhaust performance using being drilled in sand core head end face, and then realize and reduce metal casting
Gas hole defect in part.
With deepening continuously for engineering goods lightweight process, increasing thin-wall case casting is used, and these
For thin-wall case casting often to realize linkage function, its majority has connecting flange structure.Gas-insulated as shown in Figure 1 is complete
Switchgear four-way housing, it is exactly one of Typical Representative.Not only size is larger but also its minimal wall for the housing
Thickness is only 6mm, while there be 4 high muscle thin-wall flange disks of connection at the place up and down of housing.Caused using metal casting
During this housing of shape, 4 ring flanges are because high muscle structure causes its turning position etc. easily to produce stomata, and this housing is to compactness
It is again high Deng requirement, can not solve this problem using prior art.For example, using at ring flange increase exhaust rising head this
Prior art, the porosity can be reduced to a certain degree；However, ring flange deformation is easily produced in final vacuum rising head removal process
The problems such as, and its gas hole defect is still more prominent, therefore this existing technology for reducing gas hole defect is not suitable for this shells.Again
Such as, its exhaust performance is strengthened using being drilled in sand core head end face with core substituted metal core and simultaneously, it is only capable of preferably increasing
Strong overall exhaust performance, and the DeGrain of the gas hole defect suppression for ring flange corner.
As fully visible, there has been no one kind at present can effectively reduce permanent mold casting thin-wall case flange turning position stomata
The method or core of defect are available so that the yield rate of such thin-wall case casting is very low, industry average level deficiency
50%。
The content of the invention
The purpose of the present invention is caused for existing permanent mold casting thin-wall case flange turning position gas hole defect more
The problem of such part yield rate is low, invent a kind of side for reducing permanent mold casting thin-wall case flange turning position gas hole defect
Method and sand core structure.
One of technical scheme is：
A kind of method for reducing permanent mold casting thin-wall case flange turning position gas hole defect, it is characterized in that using metal mold
While casting, the annular vent groove 1 of gas collection effect has been opened up in the nearly ring flange end of sand core head, while has been opened
If opening up the axial linear air discharge duct 2 being outwards vented on the sand core head proximal end face circumference of annular vent groove 1, and make axially straight
Linear air discharge duct 2 connects with annular vent groove 1, strengthens ring flange turning position exhaust capacity accordingly, and then reduce this position
Gas hole defect.
Described annular vent groove 1 and the cross sectional shape of axial linear air discharge duct 2 are in U-shaped, del, inverted trapezoidal
One kind.
Described annular vent groove 1 and the groove width 1-3mm of axial linear air discharge duct 2.
Described annular vent groove 1 and axial linear air discharge duct 2 use mould direct forming, or are not opening up exhaust
Shaped on the core of groove using scriber class instrument cropping.
Described annular vent groove 1 is 1-5mm apart from flange side surface distance.
The quantity of described axial linear air discharge duct 2 is 3-12 bars, and is evenly distributed in core circumference.
The two of technical scheme are：
A kind of sand core structure for reducing permanent mold casting thin-wall case flange turning position gas hole defect, it is characterized in that：In core
The nearly ring flange end of core print opens up annular vent groove 1, while is opening up the sand core head proximal end face circumference of annular vent groove 1
On the axial linear air discharge duct 2 that opens up, axial linear air discharge duct 2 connects with annular vent groove 1；Wherein, annular vent groove 1
Play gas collection, axial linear air discharge duct 2 forms the passage being outwards vented；So as to enhancing ring flange turning position exhaust energy
Power and then the gas hole defect for reducing this position.
Described annular vent groove 1 and the cross sectional shape of axial linear air discharge duct 2 are in U-shaped, del, inverted trapezoidal
One kind；Described annular vent groove 1 and the groove width 1-3mm of axial linear air discharge duct 2；Described annular vent groove 1 and axle
To linear air discharge duct 2, mould direct forming can be used, also can be on the core for not opening up air discharge duct using works such as scribers
Has cropping shaping；Described annular vent groove 1 its away from ring flange end face distance be 1-5mm；Described axial linear air discharge duct 2
Quantity be 3-12 bars, and be evenly distributed in core circumference.
Beneficial effects of the present invention：
1st, sand core structure of the present invention, permanent mold casting thin-wall case flange turning position gas hole defect is effectively reduced,
So that the yield rate of such permanent mold casting thin-wall case by it is existing bring up to less than 50% 90% and more than；
2nd, sand core structure of the present invention is simple and easy, it is not necessary to special technological equipment, and hardly increase being manufactured into for part
This, has fabulous Technical Economy.
Brief description of the drawings
Fig. 1 is the gas-insulating and fully-enclosed combined electrical apparatus four-way housing 3D solid schematic diagram of the present invention；
Fig. 2 is the core dimensional structure diagram of the present invention；
Fig. 3 is the venting principleand figure of the present invention；
In figure：1- annular vent grooves, 2- axial directions linear air discharge duct.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but this cannot be used for the limit to the present invention
System, those skilled in the art according to the present invention basic thought, various modifications may be made or improve, but without departing from this
The basic thought of invention, within the scope of the present invention.
Embodiment one.
As Figure 1-3.
A kind of method for reducing permanent mold casting thin-wall case flange turning position gas hole defect, mainly for shown in Fig. 1
Permanent mold casting thin-wall case flange, using permanent mold casting shaping while, in the nearly ring flange end of sand core head
The annular vent groove 1 of gas collection effect has been opened up, while has been opened up on the sand core head proximal end face circumference for having opened up annular vent groove 1
The axial linear air discharge duct 2 being outwards vented, and axial linear air discharge duct 2 is connected with annular vent groove 1, as shown in Fig. 2
Strengthen ring flange turning position exhaust capacity accordingly, and then reduce the gas hole defect at this position.The He of annular vent groove 1 therein
The cross sectional shape of axial linear air discharge duct 2 can be one kind in U-shaped, del, inverted trapezoidal.Groove width can be in 1-3mm.Annular
Air discharge duct 1 apart from flange side surface distance should to control between 1-5mm, such as Fig. 3, to prevent annular vent groove 1 from causing flange
Plate defectses, ensure certain intensity again.Annular vent groove 1 and axial linear air discharge duct 2 can use mould direct forming,
Also can be shaped on the core for not opening up air discharge duct using scriber class instrument cropping, the quantity of axial linear air discharge duct 2 can
For 3-12 bars, and it is evenly distributed in core circumference.The exhaust figure of the present invention is as shown in Figure 3.
Embodiment two.
A kind of sand core structure for reducing permanent mold casting thin-wall case flange turning position gas hole defect, it is near in sand core head
Ring flange end opens up annular vent groove 1, while is opened up on the sand core head proximal end face circumference for having opened up annular vent groove 1
Axial linear air discharge duct 2, axial linear air discharge duct 2 connects with annular vent groove 1；Wherein, annular vent groove 1 plays gas collection
Effect, axial linear air discharge duct 2 form the passage being outwards vented；So as to, strengthen ring flange turning position exhaust capacity and then
Reduce the gas hole defect at this position.Described annular vent groove 1 and the cross sectional shape of axial linear air discharge duct 2 are U-shaped, fallen
One kind in triangle, inverted trapezoidal；Described annular vent groove 1 and the groove width 1-3mm of axial linear air discharge duct 2；Described
Annular vent groove 1 and axial linear air discharge duct 2, mould direct forming can be used, also can not open up the sand of air discharge duct
Using the shaping of the instrument croppings such as scriber on core；Described annular vent groove 1 its away from ring flange end face distance be 1-5mm；Described
The quantity of axial linear air discharge duct 2 is 3-12 bars, and is evenly distributed in core circumference.
Embodiment three.
Such as Fig. 1, with permanent mold casting gas-insulating and fully-enclosed combined electrical apparatus four-way housing, and using core shown in Fig. 2
Structure（It offers 1 annular vent groove and 6 axial linear air discharge ducts that are uniform and being penetrated with annular vent groove）.Due to
This four-way housing is symmetrical structure, so the running gate system of design is taken and allows the molten metal of melting to flow to surrounding from casting center
Mode is poured into a mould.During cast, a large amount of gases that molten metal carries just gradually are assembled from center to flange position.Flange corner is phase
To thick big position, its freezing rate is also most slow, and the gas of aggregation is also most.Now, by the sand core structure shown in Fig. 2, annular
Air discharge duct 1 has thinner relative thickness compared with end face of flange, therefore gas easily enters annular row through core thin-walled
Air drain 1, such as Fig. 1；The gas being gathered in annular vent groove 1, gas is discharged by multiple linear pattern air discharge ducts 2 of insertion；
So this structure, which effectively reduces, reduces permanent mold casting thin-wall case flange turning position gas hole defect.So as to so that this
The yield rate of metalloid mold casting thin-wall case, by it is existing bring up to less than 50% 90% and more than.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (10)
- A kind of 1. method for reducing permanent mold casting thin-wall case flange turning position gas hole defect, it is characterized in that using metal While mold casting is molded, the annular vent groove of gas collection effect has been opened up in the nearly ring flange end of sand core head（1）, while Annular vent groove is opened up（1）Sand core head proximal end face circumference on open up the axial linear air discharge duct being outwards vented（2）, and Make axial linear air discharge duct（2）With annular vent groove（1）Connection, strengthen ring flange turning position exhaust capacity accordingly, and then Reduce the gas hole defect at this position.
- 2. the method according to claim 11, it is characterized in that：Described annular vent groove（1）With axial linear air discharge duct （2）Cross sectional shape be U-shaped, del, one kind in inverted trapezoidal.
- 3. the method according to claim 11, it is characterized in that：Described annular vent groove（1）With axial linear air discharge duct （2）Groove width 1-3mm.
- 4. the method according to claim 11, it is characterized in that：Described annular vent groove（1）With axial linear air discharge duct （2）Using mould direct forming, or shaped on the core for not opening up air discharge duct using scriber class instrument cropping.
- 5. the method according to claim 11, it is characterized in that：Described annular vent groove（1）Apart from flange side surface distance For 1-5mm.
- 6. the method according to claim 11, it is characterized in that：Described axial linear air discharge duct（2）Quantity be 3-12 Bar, and be evenly distributed in core circumference.
- 7. a kind of sand core structure for reducing permanent mold casting thin-wall case flange turning position gas hole defect, it is characterized in that：In sand The nearly ring flange end of core core print opens up annular vent groove（1）, while opening up annular vent groove（1）Sand core head near-end Face circumference is provided with axial linear air discharge duct（2）, axial linear air discharge duct（2）With annular vent groove（1）Connection；Wherein, Annular vent groove（1）Play gas collection, linear air discharge duct（2）Form the passage being outwards vented；So as to enhancing ring flange turning Position exhaust capacity and then the gas hole defect for reducing this position.
- 8. sand core structure according to claim 7, it is characterized in that：Described annular vent groove（1）Arranged with axial linear Air drain（2）Cross sectional shape be U-shaped, del, one kind in inverted trapezoidal；Described annular vent groove（1）With axial straight line Shape air discharge duct（2）Groove width 1-3mm.
- 9. sand core structure according to claim 7, it is characterized in that：Described annular vent groove（1）It is away from flange side surface Distance is 1-5mm.
- 10. sand core structure according to claim 7, it is characterized in that：Described axial linear air discharge duct（2）Quantity be 3-12 bars, and be evenly distributed in core circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876314.1A CN107470566A (en) | 2017-09-25 | 2017-09-25 | Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876314.1A CN107470566A (en) | 2017-09-25 | 2017-09-25 | Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect |
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| Publication Number | Publication Date |
|---|---|
| CN107470566A true CN107470566A (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710876314.1A Pending CN107470566A (en) | 2017-09-25 | 2017-09-25 | Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126532A1 (en) * | 1983-03-30 | 1984-11-28 | Anatol Michelson | Method for the production of hollow foundry cores |
| CN101380664A (en) * | 2008-10-23 | 2009-03-11 | 河南柴油机重工有限责任公司 | A sand core manufacturing process that can avoid core-shooting fire in casting production |
| CN101497109A (en) * | 2008-01-31 | 2009-08-05 | 上海爱仕达汽车零部件有限公司 | Processing method of sand core in engine aluminum alloy cylinder metal mould low-pressure casting |
| CN201735766U (en) * | 2010-07-28 | 2011-02-09 | 重庆长安汽车股份有限公司 | Metal mold core of low pressure casting die |
| CN102380586A (en) * | 2011-10-18 | 2012-03-21 | 浙江省机电设计研究院有限公司 | Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining |
| CN102699274A (en) * | 2012-04-28 | 2012-10-03 | 宁波敏宝卫浴五金水暖洁具有限公司 | Metal gravity casting mould and method |
| CN202715766U (en) * | 2012-08-15 | 2013-02-06 | 新兴重工湖北三六一一机械有限公司 | Core box |
| CN104791401A (en) * | 2015-03-17 | 2015-07-22 | 湖北冠创铸造科技有限公司 | Iron-type coated-sand casting disc brake caliper body and producing method thereof |
| CN105081221A (en) * | 2015-08-10 | 2015-11-25 | 北京航星机器制造有限公司 | Die structure for improving quality of permanent mold casting local thick large part of thin-walled casting |
| CN105728645A (en) * | 2014-12-09 | 2016-07-06 | 重庆市金升机械配件制造有限公司 | Method for reducing number of air holes of sand-cast casting |
| CN105757308A (en) * | 2016-04-22 | 2016-07-13 | 南通华东油压科技有限公司 | Hydraulic pilot valve body casting and die thereof |
| CN205414318U (en) * | 2016-03-22 | 2016-08-03 | 河南省西峡汽车水泵股份有限公司 | Aluminum alloy tube describes flanged foundry goods metal mold gravity casting mold's structure of watering |
| CN205519582U (en) * | 2016-05-01 | 2016-08-31 | 中信戴卡股份有限公司 | Wheel die die cavity exhaust apparatus |
| CN106623796A (en) * | 2016-11-30 | 2017-05-10 | 哈尔滨工程大学 | Device for improving sand core exhausting in pouring process |
| CN206425486U (en) * | 2016-12-30 | 2017-08-22 | 江阴联华铸造有限公司 | A kind of vertical line casts air conditioning for automobiles swash plate core mold |
-
2017
- 2017-09-25 CN CN201710876314.1A patent/CN107470566A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126532A1 (en) * | 1983-03-30 | 1984-11-28 | Anatol Michelson | Method for the production of hollow foundry cores |
| CN101497109A (en) * | 2008-01-31 | 2009-08-05 | 上海爱仕达汽车零部件有限公司 | Processing method of sand core in engine aluminum alloy cylinder metal mould low-pressure casting |
| CN101380664A (en) * | 2008-10-23 | 2009-03-11 | 河南柴油机重工有限责任公司 | A sand core manufacturing process that can avoid core-shooting fire in casting production |
| CN201735766U (en) * | 2010-07-28 | 2011-02-09 | 重庆长安汽车股份有限公司 | Metal mold core of low pressure casting die |
| CN102380586A (en) * | 2011-10-18 | 2012-03-21 | 浙江省机电设计研究院有限公司 | Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining |
| CN102699274A (en) * | 2012-04-28 | 2012-10-03 | 宁波敏宝卫浴五金水暖洁具有限公司 | Metal gravity casting mould and method |
| CN202715766U (en) * | 2012-08-15 | 2013-02-06 | 新兴重工湖北三六一一机械有限公司 | Core box |
| CN105728645A (en) * | 2014-12-09 | 2016-07-06 | 重庆市金升机械配件制造有限公司 | Method for reducing number of air holes of sand-cast casting |
| CN104791401A (en) * | 2015-03-17 | 2015-07-22 | 湖北冠创铸造科技有限公司 | Iron-type coated-sand casting disc brake caliper body and producing method thereof |
| CN105081221A (en) * | 2015-08-10 | 2015-11-25 | 北京航星机器制造有限公司 | Die structure for improving quality of permanent mold casting local thick large part of thin-walled casting |
| CN205414318U (en) * | 2016-03-22 | 2016-08-03 | 河南省西峡汽车水泵股份有限公司 | Aluminum alloy tube describes flanged foundry goods metal mold gravity casting mold's structure of watering |
| CN105757308A (en) * | 2016-04-22 | 2016-07-13 | 南通华东油压科技有限公司 | Hydraulic pilot valve body casting and die thereof |
| CN205519582U (en) * | 2016-05-01 | 2016-08-31 | 中信戴卡股份有限公司 | Wheel die die cavity exhaust apparatus |
| CN106623796A (en) * | 2016-11-30 | 2017-05-10 | 哈尔滨工程大学 | Device for improving sand core exhausting in pouring process |
| CN206425486U (en) * | 2016-12-30 | 2017-08-22 | 江阴联华铸造有限公司 | A kind of vertical line casts air conditioning for automobiles swash plate core mold |
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| PB01 | Publication | ||
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Application publication date: 20171215 |