CN109773160A - The low-pressure casting process of aluminum alloy impeller - Google Patents
The low-pressure casting process of aluminum alloy impeller Download PDFInfo
- Publication number
- CN109773160A CN109773160A CN201910249547.8A CN201910249547A CN109773160A CN 109773160 A CN109773160 A CN 109773160A CN 201910249547 A CN201910249547 A CN 201910249547A CN 109773160 A CN109773160 A CN 109773160A
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- Prior art keywords
- aluminum alloy
- impeller
- pressure casting
- sand core
- low
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- 238000005266 casting Methods 0.000 title claims abstract description 32
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000005011 phenolic resin Substances 0.000 claims abstract description 6
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 6
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 239000010431 corundum Substances 0.000 claims description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000013003 hot bending Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 4
- 229910000632 Alusil Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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Abstract
The invention belongs to the manufacturing fields of centrifugal blower impeller, and in particular to a kind of low-pressure casting process of aluminum alloy impeller.The following steps are included: (1) uses thermosetting phenolic resin precoated sand, impeller inner cavity blade sand core is produced using overlay film sand core production method；(2) it is dried after blade sand core outer surface coating refractory coating；(3) body mold of impeller is attached on air injection machine to working surface spray coating heat preservation adiabatic coating after being preheated to 200~240 DEG C；(4) body mold is put into blade sand core after being preheating to 300~400 DEG C, carries out low pressure casting, and molten aluminum obtains aluminum alloy impeller after entering the solidification of type chamber.Aluminum alloy impeller prepared by the present invention, shape is completely clear, and dimensional accuracy is high, and no casting flaw, dynamic balance performance is good, and quality is stablized, and meets the requirement of blower.
Description
Technical field
The invention belongs to the manufacturing fields of centrifugal blower impeller, and in particular to a kind of low pressure casting of aluminum alloy impeller
Make technique.
Background technique
The production field of aluminum alloy impeller at present, main process have one kind, are outside being made using self-hardening resin sand
Type, precoated sand or cold-box sand make sand core, and casting molten aluminum obtains aluminum alloy impeller after the combination of type core.The drawbacks of this method is
Product size precision is not high, appearance is coarse, and computing ballance correction is big and product is easy to appear shrinkage cavity shrinkage porosity, product mechanicalness at thermal center
Can be general, labor efficiency is low, high expensive.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of low-pressure casting process of aluminum alloy impeller, institutes
The draught fan impeller obtained, shape is completely clear, and dimensional accuracy is high, and no casting flaw, dynamic balance performance is good, and quality is stablized, and meets wind
The requirement of machine.
The low-pressure casting process of aluminum alloy impeller of the present invention, comprising the following steps:
(1) overlay film sand core production method produces impeller inner cavity blade sand core；
(2) it is dried after blade sand core outer surface coating refractory coating；
(3) body mold of impeller is attached on air injection machine to working surface spray coating heat preservation after being preheated to 200~240 DEG C
Adiabatic coating；
(4) body mold is put into blade sand core after being preheating to 300~400 DEG C, carries out low pressure casting, it is solidifying that molten aluminum enters type chamber
Gu aluminum alloy impeller is obtained after；
Wherein, overlay film sand core production method described in step (1), using the thermosetting phenolic resin overlay film of 40~70 mesh
Sand, gas forming amount≤10mL/g, room temperature bending strength >=3MPa, hot bending strength >=3MPa.
Preferably, the body mold of impeller is attached on air injection machine to working surface after being preheated to 230 DEG C in step (3)
Spray coating heat preservation adiabatic coating.
Preferably, fireproof coating described in step (2) is water base corundum coatings.
Preferably, drying described in step (2) uses heated air circulation type drying oven, and drying temperature is 100~130 DEG C,
It is preferred that 120 DEG C, drying time is 80~120 minutes, preferably 90 minutes.
Preferably, it is the water base of major ingredient that heat preservation adiabatic coating described in step (3), which is talcum powder, mica and titanium dioxide,
Coating.
Preferably, molten aluminum described in step (4) be alusil alloy, preferably the trade mark be A356 alusil alloy, molten aluminum into
The temperature for entering type chamber is 685 ± 5 DEG C.
Running gate system, heating system, cooling and pumped vacuum systems, exhaust system and top are provided in the body mold
System out.
Compared with prior art, beneficial effects of the present invention are as follows:
The impeller of the low-pressure casting process preparation of aluminum alloy impeller provided by the invention, shape is completely clear, size essence
Degree is high, and no casting flaw, dynamic balance performance is good, and quality is stablized, and meets the requirement of blower.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Embodiment 1
A kind of Multi-stage centrifugal fan impeller, overall size are diameter 650mm, total height 260mm, average wall thickness 6mm, leaf
Piece wall thickness 3mm, piece weight 22kg.It is required that the casting of impeller outer surface is smooth, dimensional accuracy CT8 grades is cast, computing ballance correction
≤ 100g, dense internal organization, no shrinkage cavity and porosity, slag inclusion, crackle.
It prepares this impeller and uses aluminum alloy impeller low-pressure casting process of the present invention, comprising the following steps:
(1) overlay film sand core production method is utilized, using gas forming amount≤10mL/g, room temperature bending strength >=3MPa, hot bending resistance
Intensity >=3MPa, the thermosetting phenolic resin precoated sand of 40~70 mesh produce impeller inner cavity blade sand core；
(2) blade sand core outer surface uses heated air circulation type drying oven after coating water base corundum coatings, dries 90 at 120 DEG C
Minute；
(3) body mold of impeller is attached on air injection machine to working surface after being preheated to 230 DEG C and sprays talcum powder, cloud
Female and titanium dioxide is the water based paint of major ingredient；
(4) body mold is put into blade sand core after being preheating to 350 DEG C, carries out low pressure casting, and the aluminium silicon that the trade mark is A356 closes
Golden molten aluminum obtains aluminum alloy impeller after entering the solidification of type chamber controlled at 685 ± 5 DEG C.
Running gate system, heating system, cooling and pumped vacuum systems, exhaust system and ejection system are provided in body mold
System.
The aluminum alloy impeller prepared using above-mentioned technique, integrated yield reach 98%, resulting draught fan impeller, and shape is complete
Whole clear, dimensional accuracy is high, and no casting flaw, dynamic balance performance is good, and quality is stablized, and meets the requirements.
Embodiment 2
A kind of Multi-stage centrifugal fan impeller, overall size are diameter 800mm, total height 260mm, average wall thickness 6mm, leaf
Piece wall thickness 3mm, piece weight 28kg.It is required that the casting of impeller outer surface is smooth, dimensional accuracy CT8 grades is cast, computing ballance correction
≤ 100g, dense internal organization, no shrinkage cavity and porosity, slag inclusion, crackle.
It prepares this impeller and uses aluminum alloy impeller low-pressure casting process of the present invention, comprising the following steps:
(1) overlay film sand core production method is utilized, using gas forming amount≤10mL/g, room temperature bending strength >=3MPa, hot bending resistance
Intensity >=3MPa, the thermosetting phenolic resin precoated sand of 40~70 mesh produce impeller inner cavity blade sand core；
(2) blade sand core outer surface uses heated air circulation type drying oven after coating water base corundum coatings, dries 90 at 120 DEG C
Minute；
(3) body mold of impeller is attached on air injection machine to working surface after being preheated to 230 DEG C and sprays talcum powder, cloud
Female and titanium dioxide is the water based paint of major ingredient；
(4) body mold is put into blade sand core after being preheating to 350 DEG C, carries out low pressure casting, and the aluminium silicon that the trade mark is A356 closes
Golden molten aluminum obtains aluminum alloy impeller after entering the solidification of type chamber controlled at 685 ± 5 DEG C.
Running gate system, heating system, cooling and pumped vacuum systems, exhaust system and ejection system are provided in body mold
System.
The aluminum alloy impeller prepared using above-mentioned technique, integrated yield reach 97%, resulting draught fan impeller, and shape is complete
Whole clear, dimensional accuracy is high, and no casting flaw, dynamic balance performance is good, and quality is stablized, and meets the requirements.
Embodiment 3
Cooling impeller in a kind of industrial motor, overall size are diameter 500mm, total height 400mm, average wall thickness 8mm,
Blade wall thickness 7mm, piece weight 25kg.It is required that the casting of impeller outer surface is smooth, dimensional accuracy CT8 grades is cast, dynamic balancing
Amount≤80g, dense internal organization, no shrinkage cavity and porosity, slag inclusion, crackle.
It prepares this impeller and uses aluminum alloy impeller low-pressure casting process of the present invention, comprising the following steps:
(1) overlay film sand core production method is utilized, using gas forming amount≤10mL/g, room temperature bending strength >=3MPa, hot bending resistance
Intensity >=3MPa, the thermosetting phenolic resin precoated sand of 40~70 mesh produce impeller inner cavity blade sand core；
(2) blade sand core outer surface uses heated air circulation type drying oven after coating water base corundum coatings, dries 90 at 120 DEG C
Minute；
(3) body mold of impeller is attached on air injection machine to working surface after being preheated to 230 DEG C and sprays talcum powder, cloud
Female and titanium dioxide is the water based paint of major ingredient；
(4) body mold is put into blade sand core after being preheating to 350 DEG C, carries out low pressure casting, and the aluminium silicon that the trade mark is A356 closes
Golden molten aluminum obtains aluminum alloy impeller after entering the solidification of type chamber controlled at 685 ± 5 DEG C.
Running gate system, heating system, cooling and pumped vacuum systems, exhaust system and ejection system are provided in body mold
System.
The aluminum alloy impeller prepared using above-mentioned technique, integrated yield reach 99%, resulting draught fan impeller, and shape is complete
Whole clear, dimensional accuracy is high, and no casting flaw, dynamic balance performance is good, and quality is stablized, and meets the requirements.
Certainly, above content is only presently preferred embodiments of the present invention, be should not be construed as limiting to implementation of the invention
Example range.The present invention is also not limited to the example above, and those skilled in the art are in essential scope of the invention
Interior made all the changes and improvements etc., should all belong in patent covering scope of the invention.
Claims (6)
1. a kind of low-pressure casting process of aluminum alloy impeller, it is characterised in that: the following steps are included:
(1) overlay film sand core production method produces impeller inner cavity blade sand core；
(2) it is dried after blade sand core outer surface coating refractory coating；
(3) body mold of impeller is attached on air injection machine to working surface spray coating heat preservation after being preheated to 200~240 DEG C to be insulated
Coating；
(4) body mold is put into blade sand core after being preheating to 300~400 DEG C, low pressure casting is carried out, after molten aluminum enters the solidification of type chamber
Obtain aluminum alloy impeller；
Wherein, overlay film sand core production method described in step (1), using the thermosetting phenolic resin precoated sand of 40~70 mesh, hair
Tolerance≤10mL/g, room temperature bending strength >=3MPa, hot bending strength >=3MPa.
2. the low-pressure casting process of aluminum alloy impeller according to claim 1, it is characterised in that: described in step (2)
Fireproof coating is water base corundum coatings.
3. the low-pressure casting process of aluminum alloy impeller according to claim 1, it is characterised in that: described in step (2)
Drying uses heated air circulation type drying oven, and drying temperature is 100~130 DEG C, and drying time is 80~120 minutes.
4. the low-pressure casting process of aluminum alloy impeller according to claim 1, it is characterised in that: described in step (3)
Heat preservation adiabatic coating is the water based paint that talcum powder, mica and titanium dioxide are major ingredient.
5. the low-pressure casting process of aluminum alloy impeller according to claim 1, it is characterised in that: described in step (4)
Molten aluminum is alusil alloy, and the temperature that molten aluminum enters type chamber is 685 ± 50 DEG C.
6. the low-pressure casting process of aluminum alloy impeller according to claim 1, it is characterised in that: in the body mold
It is provided with running gate system, heating system, cooling and pumped vacuum systems, exhaust system and ejection system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910249547.8A CN109773160A (en) | 2019-03-29 | 2019-03-29 | The low-pressure casting process of aluminum alloy impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910249547.8A CN109773160A (en) | 2019-03-29 | 2019-03-29 | The low-pressure casting process of aluminum alloy impeller |
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| Publication Number | Publication Date |
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| CN109773160A true CN109773160A (en) | 2019-05-21 |
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| CN201910249547.8A Pending CN109773160A (en) | 2019-03-29 | 2019-03-29 | The low-pressure casting process of aluminum alloy impeller |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180998A (en) * | 2019-06-24 | 2019-08-30 | 山东鸿源新材料有限公司 | The production technology of aluminium alloy air inlet pipe |
| CN111894897A (en) * | 2020-08-06 | 2020-11-06 | 佛山市南海区绿智电机设备有限公司 | Impeller for centrifugal fan and preparation equipment and preparation method thereof |
| CN113798445A (en) * | 2021-09-08 | 2021-12-17 | 老河口市宇骏精密机械有限公司 | Manufacturing method of aluminum cylinder of shock absorber |
| CN114393177A (en) * | 2022-01-25 | 2022-04-26 | 烟台路通精密科技股份有限公司 | A casting process and device for a large thin-walled aluminum alloy supercharger impeller |
| CN114474323A (en) * | 2022-01-06 | 2022-05-13 | 湖南临亚建材科技有限公司 | Assembled superimposed sheet production mould |
| CN116900253A (en) * | 2023-07-17 | 2023-10-20 | 烟台双诚机械有限公司 | Aluminum alloy casting fan blade production process |
| CN118287628A (en) * | 2024-05-11 | 2024-07-05 | 广州和德轻量化成型技术有限公司 | Liquid die forging method for aluminum alloy part with complex inner cavity |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180998A (en) * | 2019-06-24 | 2019-08-30 | 山东鸿源新材料有限公司 | The production technology of aluminium alloy air inlet pipe |
| CN111894897A (en) * | 2020-08-06 | 2020-11-06 | 佛山市南海区绿智电机设备有限公司 | Impeller for centrifugal fan and preparation equipment and preparation method thereof |
| CN113798445A (en) * | 2021-09-08 | 2021-12-17 | 老河口市宇骏精密机械有限公司 | Manufacturing method of aluminum cylinder of shock absorber |
| CN114474323A (en) * | 2022-01-06 | 2022-05-13 | 湖南临亚建材科技有限公司 | Assembled superimposed sheet production mould |
| CN114393177A (en) * | 2022-01-25 | 2022-04-26 | 烟台路通精密科技股份有限公司 | A casting process and device for a large thin-walled aluminum alloy supercharger impeller |
| CN116900253A (en) * | 2023-07-17 | 2023-10-20 | 烟台双诚机械有限公司 | Aluminum alloy casting fan blade production process |
| CN118287628A (en) * | 2024-05-11 | 2024-07-05 | 广州和德轻量化成型技术有限公司 | Liquid die forging method for aluminum alloy part with complex inner cavity |
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