JPS6229135B2 - - Google Patents
Info
- Publication number
- JPS6229135B2 JPS6229135B2 JP11867582A JP11867582A JPS6229135B2 JP S6229135 B2 JPS6229135 B2 JP S6229135B2 JP 11867582 A JP11867582 A JP 11867582A JP 11867582 A JP11867582 A JP 11867582A JP S6229135 B2 JPS6229135 B2 JP S6229135B2
- Authority
- JP
- Japan
- Prior art keywords
- chiller
- molten metal
- mold
- mica
- coating agent
- 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.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 17
- 239000010445 mica Substances 0.000 claims description 9
- 229910052618 mica group Inorganic materials 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- RJDOZRNNYVAULJ-UHFFFAOYSA-L [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] RJDOZRNNYVAULJ-UHFFFAOYSA-L 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010068 moulding (rubber) Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940074404 sodium succinate Drugs 0.000 description 1
- -1 sulfone sodium succinate Chemical class 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/04—Machines or apparatus for chill casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、ターボチヤージヤのコンプレツサホ
イールの複雑な形状の肉厚差の大きな製品の鋳造
に用いる鋳造用の冷し金に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a casting chill used for casting compressor wheels of turbochargers having complex shapes and large differences in wall thickness.
従来、ターボチヤージヤのコンプレツサホイー
ルの如き羽根部が薄肉でハブ部が厚肉という肉厚
の大きな製品は、第１図に示す如く鋳型ａの製品
キヤビテイｂの羽根部ｃへの湯回り性を向上する
目的で鋳型ａを予熱すると共に、ハブ部ｄの引け
巣及び結晶粒の粗大化防止のため冷し金ｅを使用
して真空鋳造するを一般とするが、この冷し金ｅ
は非常に微妙な熱的設計が要求され、熱容量が小
さいと冷し金ｅとしての効果が減少され、熱容量
が大きい場合は冷し金ｅに接触した溶湯の凝固が
急速に起こり、湯流れ性が悪化して、冷し金ｅに
近い羽根部ｃの湯回り不良或いは湯境不良が発生
する。 Conventionally, for products with large walls such as compressor wheels for turbochargers, where the blade part is thin and the hub part is thick, the flow of water to the blade part c of product cavity b in mold a is improved as shown in Figure 1. In general, mold a is preheated for the purpose of mold a, and vacuum casting is performed using a chiller e to prevent shrinkage cavities and coarsening of crystal grains in the hub portion d.
A very delicate thermal design is required; if the heat capacity is small, the effectiveness of the chiller e will be reduced, and if the heat capacity is large, the molten metal that comes into contact with the chiller will solidify rapidly, resulting in poor flowability. As a result, poor hot water circulation or poor water quality occurs in the blade portion c near the chiller e.
本発明は、かかる不都合を解消した冷し金を提
供することをその目的とするもので、冷し金本体
の溶湯との接触面に雲母を含む塗型剤を塗布した
ことを特徴とする。 The object of the present invention is to provide a chiller that eliminates such inconveniences, and is characterized in that a coating agent containing mica is applied to the surface of the chiller body that comes into contact with the molten metal.
次いで本発明を第２図及び第３図に示す実施例
に付説明する。 Next, the present invention will be explained with reference to the embodiments shown in FIGS. 2 and 3.
第２図で１はプラスタモールド法やラバーモー
ルド法等で形成されたコンプレツサホイール用の
石コウ鋳型を示し、該鋳型１は、その頂部の湯口
２に連るコンプレツサ形状に対応した羽根部３ａ
とハブ部３ｂとを有する製品キヤビテイ３を備
え、該キヤビテイ３のハブ部３ｂの底面に冷し金
本体４を組付けるものとした。 In Fig. 2, reference numeral 1 indicates a plaster mold for a compressor wheel formed by plaster molding, rubber molding, etc., and the mold 1 has a blade portion 3a corresponding to the shape of the compressor connected to a sprue 2 at the top of the mold.
The product cavity 3 is provided with a hub part 3b and a chiller main body 4 is assembled to the bottom surface of the hub part 3b of the cavity 3.
該冷し金本体４には、溶湯との接触面に予め雲
母を含む塗型剤を塗布して塗膜５を形成するもの
とした。 A coating agent containing mica was applied in advance to the surface of the cooling metal body 4 that was in contact with the molten metal to form a coating film 5 thereon.
該塗膜５は、第３図に模式的に示す如く雲母５
ａ間の空隙５ｂを有する空隙性に富んだものとな
り、これによれば湯口２からの注湯初期、該空隙
５ｂの断熱作用で冷し金本体４への熱伝導が低く
抑えられ、溶湯の冷却による湯流れ性の悪化が可
及的に防止されて、羽根部３ａへの湯回りが良く
なる。そして、溶湯が充満されると溶湯圧力によ
り該空隙５ｂは消失され、該塗膜５の熱伝導性が
高められて、該本体４への熱伝導による冷却効果
が充分に発揮される。 The coating film 5 is made of mica 5 as schematically shown in FIG.
According to this structure, at the beginning of pouring from the sprue 2, heat conduction to the chiller body 4 is suppressed to a low level due to the insulation effect of the gaps 5b, and the molten metal is Deterioration of the flowability of hot water due to cooling is prevented as much as possible, and the flow of hot water to the blade portions 3a is improved. When the molten metal is filled, the voids 5b are eliminated by the pressure of the molten metal, the thermal conductivity of the coating film 5 is increased, and the cooling effect by heat conduction to the main body 4 is fully exhibited.
第４図は雲母を含む塗型剤を塗布した本発明冷
し金と、比較のため雲母を含まないダイカスト用
塗型剤を塗布した第１比例冷し金と、塗型剤を塗
布しない第２比較冷し金（従来品）とを用い、第
５図に示す如き鋳型に700℃のアルミ溶湯を注湯
して、冷し金本体４のＡ点の温度の径時変化を測
定した比較実験結果を示し、第１比較冷し金で
は、上記した本発明冷し金のような注湯初期の伝
熱抑制効果が得られず温度が塗型剤を塗布しない
場合と同程度に急上昇することが分る。 Figure 4 shows the cooling die of the present invention coated with a coating agent containing mica, the first proportional cooling die coated with a die casting coating agent containing no mica for comparison, and the first proportional cooling die coated with a coating agent not containing mica. 2 Comparison Using a comparative chiller (conventional product), 700℃ molten aluminum was poured into a mold as shown in Figure 5, and the temperature change over time at point A of the chiller body 4 was measured. The experimental results show that the first comparative chiller does not have the effect of suppressing heat transfer at the initial stage of pouring like the chiller of the present invention described above, and the temperature rises rapidly to the same level as when no coating agent is applied. I understand.
尚、第２比較冷し金においては、注湯初期の急
激な凝固で冷し金との接触表面に所謂キライが発
生し、その後の溶湯から冷し金への熱伝導が悪く
なり、冷し金の外部放熱量が溶湯からの伝熱量を
上回つて昇温後の比較的急な温度降下を生ずる。 In the case of the second comparative chilled metal, the rapid solidification at the initial stage of pouring caused so-called discomfort on the contact surface with the chilled metal, which deteriorated the subsequent heat conduction from the molten metal to the chilled metal. The amount of heat released from the gold to the outside exceeds the amount of heat transferred from the molten metal, resulting in a relatively rapid temperature drop after the temperature rise.
次に本発明による鋳造試験について説明する。
先ず水８中に、湿潤剤として陰イオン界面活性
剤であるジアルキルスルホン・コハク酸ナトリウ
ムの５％水溶液150c.c.、消気剤としてＮ−オクチ
ルアルコール20c.c.、及び粘結剤として水溶性塩類
であるケイ酸カリウム溶液20ｇを入れ、静かに５
〜10分間撹拌した後、この溶液中に金属アルミ粉
450ｇ及び合成雲母（ナトリウム、フツ素、４ケ
イ素を含む）を15％含む水溶液1.5を入れて10
〜15分間撹拌せしめ、かくて得られた雲母入りの
塗型剤を冷し金本体４の溶湯接触面に膜厚を最大
４μ程度として塗布し乾燥固化する。 Next, a casting test according to the present invention will be explained.
First, in water 8, add 150 c.c. of a 5% aqueous solution of dialkyl sulfone sodium succinate, which is an anionic surfactant, as a wetting agent, 20 c.c. of N-octyl alcohol, which is an extinguishing agent, and an aqueous solution as a binder. Add 20g of potassium silicate solution, which is a salt, and gently stir
After stirring for ~10 minutes, add metallic aluminum powder into this solution.
Add 450g and 1.5% of an aqueous solution containing 15% synthetic mica (containing sodium, fluorine, and 4 silicones).
After stirring for ~15 minutes, the mica-containing coating agent thus obtained is applied to the molten metal contact surface of the chilled metal body 4 to a maximum film thickness of about 4 μm, and dried and solidified.
このようにして塗膜５を形成した冷し金本体４
を第２図示の如く鋳型１に組付け、約300℃に予
熱保持してAC4C相当のアルミ合金を約730℃で
真空鋳造したところ、冷し金本体４に近接する羽
根部３ａの先端部においても湯回り不良や湯境い
が全く認められず、且つハブ部３ｂの内部組織も
健全な良好な製品が得られた。 The chiller body 4 with the coating film 5 formed in this way
was assembled into the mold 1 as shown in the second figure, preheated at approximately 300°C, and an aluminum alloy equivalent to AC4C was vacuum cast at approximately 730°C. A good product was obtained in which no poor hot water circulation or insufficient hot water was observed, and the internal structure of the hub portion 3b was also sound.
この様に本発明によるときは、冷し金本体の溶
湯接触面に形成する雲母を含んだ塗型剤の塗膜に
より、注湯初期の溶湯の冷却を抑制して、その後
に冷却効果を発揮させることが可能となり、複雑
な形状の製品であつても湯回り不良を生ずること
なく且つ健全な内部組織をもつものに鋳造出来る
効果を有する。 As described above, according to the present invention, the coating film of the coating agent containing mica formed on the molten metal contact surface of the chiller body suppresses the cooling of the molten metal at the initial stage of pouring, and thereafter exhibits a cooling effect. This has the effect that even products with complicated shapes can be cast into products with a healthy internal structure without causing poor molten metal flow.
第１図は従来例の裁断側面図、第２図は本発明
冷し金の１例の使用状態の裁断側面図、第３図は
その塗膜部分の模式図、第４図は冷し金の比較試
験結果を示す線図、第５図はこの試験に用いた装
置の裁断側面図である。
４……冷し金本体、５……塗膜。
Fig. 1 is a cut side view of a conventional example, Fig. 2 is a cut side view of an example of the chiller of the present invention in use, Fig. 3 is a schematic diagram of its coating part, and Fig. 4 is a chiller. Figure 5 is a cutaway side view of the device used in this test. 4...Cold metal body, 5...Coating film.
Claims (1)
型剤を塗布して塗膜を形成したことを特徴とする
鋳造用冷し金。1. A chilled metal for casting, characterized in that a coating agent containing mica is applied to the surface of the chilled metal body that comes into contact with the molten metal to form a coating film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11867582A JPS5910443A (en) | 1982-07-09 | 1982-07-09 | Chiller for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11867582A JPS5910443A (en) | 1982-07-09 | 1982-07-09 | Chiller for casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5910443A JPS5910443A (en) | 1984-01-19 |
| JPS6229135B2 true JPS6229135B2 (en) | 1987-06-24 |
Family
ID=14742418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11867582A Granted JPS5910443A (en) | 1982-07-09 | 1982-07-09 | Chiller for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910443A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5582874B2 (en) * | 2010-05-31 | 2014-09-03 | 花王株式会社 | Coating agent composition |
-
1982
- 1982-07-09 JP JP11867582A patent/JPS5910443A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5910443A (en) | 1984-01-19 |
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