JPH064995Y2 - Chill for casting - Google Patents
Chill for castingInfo
- Publication number
- JPH064995Y2 JPH064995Y2 JP1987086464U JP8646487U JPH064995Y2 JP H064995 Y2 JPH064995 Y2 JP H064995Y2 JP 1987086464 U JP1987086464 U JP 1987086464U JP 8646487 U JP8646487 U JP 8646487U JP H064995 Y2 JPH064995 Y2 JP H064995Y2
- Authority
- JP
- Japan
- Prior art keywords
- chill
- casting
- thick
- product
- skirting board
- 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 - Lifetime
Links
- 238000005266 casting Methods 0.000 title claims description 20
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 235000013372 meat Nutrition 0.000 claims 1
- 230000007547 defect Effects 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は鋳造用冷し金の改良に係り、詳しくは中子の機
能を兼備する冷し金に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to improvement of a chill for casting, and more particularly to a chill having a core function.
［従来の技術］ 各種産業機械部品に汎用されている球状黒鉛鋳鉄は、普
通鋳鉄に比べて凝固収縮が大きく、従って引け巣のよう
な鋳造欠陥が発生し易いため、一般に押湯による溶湯補
給を必要とする。[Prior Art] Spheroidal graphite cast iron, which is widely used for various industrial machine parts, has a larger solidification shrinkage than ordinary cast iron, and therefore casting defects such as shrinkage cavities are more likely to occur. I need.
第２図に例示した鋳造成品は、厚肉のボスａ、比較的薄
肉のディスクリブｂ及びリムｃの各部からなる通常の歯
車材で、このような肉厚差の大きい形状の成品において
は、リムｃ部に設けられる外周押湯ではボスａ部への波
及効果が期待しえないため、ボスａ部の直上部に押湯Ｒ
を設け、鋳抜き孔成形用の中子を併設したウォッシュバ
ーン中子Ｗを使用して、直接押湯効果を享受する方案が
実施されている。The cast product illustrated in FIG. 2 is a normal gear material consisting of a thick boss a, a relatively thin disc rib b, and a rim c. In the product having such a large difference in wall thickness, Since the outer peripheral riser provided at the rim c portion cannot be expected to have a ripple effect on the boss a portion, the riser R is provided directly above the boss a portion.
And a washburn core W provided with a core for forming a casting hole is used to directly enjoy the effect of the feeder.
なお、第３図のウォッシュバーン中子Ｗ′は、第２図の
同中子Ｗの幅木Ｐを舟形状Ｐ′に形成した変形例を示す
もので、これらウォッシュバーン中子Ｗ、Ｗ′には専ら
油中子やシェル中子が使用されている。The washburn core W'in FIG. 3 shows a modification in which the skirting board P of the core W in FIG. 2 is formed into a boat shape P '. Oil cores and shell cores are used exclusively.
［考案が解決しようとする問題点］ ところが上述のウォッシュバーン中子を用いた鋳造方案
は、以下に記載するいくつかの問題点を有する。[Problems to be Solved by the Invention] However, the casting method using the above-described washburn core has some problems described below.
（１）押湯を必要とするため鋳造の歩留まりが悪い。(1) The yield of casting is poor because the riser is required.
（２）機械込めにより揚り押湯となるため押湯効果が小
さく、堰Ｇの下方部分に依然として引け巣欠陥が発生し
易い。(2) Since the feeder is lifted by loading into the machine, the feeder effect is small, and shrinkage cavity defects are still likely to occur in the lower portion of the weir G.
（３）型合せ時装入されたウォッシュバーン中子が上型
と干渉して、中子の折損や傾ぎ不良を生じ易い。(3) The washburn core inserted during mold matching is likely to interfere with the upper mold, causing breakage or tilting failure of the core.
（４）ボスａの肉厚によってウォッシュバーン中子の高
さが決定づけられるので、異なる肉厚の成品に対してそ
れぞれ専用の中子が必要となる。(4) Since the height of the washburn core is determined by the thickness of the boss a, dedicated cores are required for products having different wall thicknesses.
（５）経済性の観点から中子費用の占める負担が大き
い。(5) The core cost is large from the economical point of view.
本考案は、冷し金の改良によって上記押湯並びに砂中子
の省略を図ることを解決すべき技術課題とするものであ
る。An object of the present invention is to solve the technical problem to improve the chiller so as to omit the feeder and the sand core.
［問題点を解決するための手段］ 上記課題を解決する本考案は、厚肉部に鋳抜き孔をもつ
成品の鋳造用砂型に装入される冷し金であって、該冷し
金は抜け勾配を有して実質的に上記鋳抜き孔を成形する
内冷し金部分と、該内冷し金部分の一端に連接して上記
厚肉部端面をとの十分な接触面及び容積をもつ固定幅木
兼用の外冷し金部分とを備え、該内冷し金部分の上記厚
肉部を越える他端延出部が、該厚肉部の寸法変化に対応
する可変幅木を構成するとともに、該冷し金の少なくと
も溶湯との接触面に塗型を施すという技術手段を講じて
いる。[Means for Solving the Problems] The present invention which solves the above-mentioned problems is a chill which is inserted into a sand mold for casting of a product having a casting hole in a thick portion, and the chill is Sufficient contact surface and volume are provided between the inner-cooled metal portion that has a draft angle and substantially forms the casting hole, and the thick-walled end surface that is connected to one end of the inner-cooled metal portion. An outer chilled portion that also serves as a fixed skirting, and the other end extending portion of the inner chilled portion that exceeds the thick portion constitutes a variable skirting board that corresponds to the dimensional change of the thick portion. At the same time, the technical means of applying a coating mold to at least the contact surface of the cold metal with the molten metal is taken.
本考案になる冷し金は、普遍的に用いられているそれと
同様普通鋳鉄など鉄系金属からなるものであって、第２
図に例示の歯車材に限らず引け巣の生じ易い厚肉部に鋳
抜き孔の形成されたあらゆる成品の鋳造に適用すること
ができ、一般的には機械込めによって造型された砂型中
に装入される。冷し金の上記内冷し金部分は実質的に鋳
抜き孔を成形する中子としての機能を兼備し、注入され
る溶湯によって鋳包まれるため、後処理において成品か
らの離脱を容易にすべく1/60程度の抜け勾配が付与さ
れ、かつ表面粗さも１５０μｍＲｚ以下とすることが望
ましい。なお、上記成品からの離脱の容易化に加えて吹
かれのような鋳造欠陥を生じないよう、溶湯との接触面
に例えば黒鉛系の塗型が施されている。The chill according to the present invention is made of an iron-based metal such as ordinary cast iron as is commonly used.
Not limited to the gear material illustrated in the figure, it can be applied to casting of any product having a cast hole formed in a thick portion where shrinkage cavities are likely to occur, and is generally mounted in a sand mold formed by machine loading. Be entered. The inner chilled portion of the chill has substantially the function of a core for forming a casting hole, and is cast and wrapped by the molten metal to be injected, so that it is easy to separate from the product in post-treatment. It is desirable that a draft of about 1/60 be provided and the surface roughness be 150 μmRz or less. In addition to facilitating separation from the product, a graphite-based coating die is applied to the contact surface with the molten metal so as to prevent casting defects such as blowing.
内冷し金部分の一端には例えば下型と係合する固定幅木
が一体的に連接されるが、該固定幅木は厚肉部端面との
十分な接触面と容積とを有する外冷し金部分として機能
している。そして同内冷し金部分の他端は成品厚肉部を
越えてさらに延出し、該厚肉部寸法の変化をその延出量
の伸縮によって吸収するいわゆる可変幅木として構成さ
れている。For example, a fixed skirting board that engages with the lower mold is integrally connected to one end of the inner cooling metal part, and the fixed skirting board has an outside contact surface having a sufficient contact surface with the end face of the thick part and a volume. It functions as a metal part. The other end of the internally chilled portion further extends beyond the thick portion of the product, and is configured as a so-called variable skirting board that absorbs a change in the dimension of the thick portion by expansion and contraction of the extension amount.
［作用］ 上記本考案になる冷し金を用いるときには、鋳抜き孔を
成形する中子兼用の内冷し金部分及び厚肉部端面との十
分な接触面及び容積をもつ固定幅木兼用の外冷し金部分
によって厚肉部の凝固が促進され、押湯の省略にもかか
わらず十分な引け巣欠陥の防止機能に加えて、安定した
中子の保持機能を発揮する。そして成品溶湯によって鋳
包まれた冷し金は、抜け勾配の作用により小さな衝撃で
容易に成品から離脱できるため、洗浄、塗型等簡単な準
備処理を繰り返すのみで引続き再使用に供される。な
お、成品の厚肉部寸法が幾分変化した場合でも、内冷し
金部分の他端延出部に構成された可変幅木が伸縮してこ
れに対応するので、異なる成品に対しても該冷し金を広
く流用実施することが可能である。[Operation] When using the above-described chill according to the present invention, the inner chill part for forming the casting hole also serves as a fixed baseboard having a sufficient contact surface and volume with the end face of the thick part. The outside-cooled metal part promotes solidification of the thick part, and exhibits a stable core holding function in addition to a sufficient function of preventing shrinkage cavity defects despite the omission of the feeder. The chill metal cast by the molten product can be easily separated from the product by a small impact due to the action of the draft, so that it can be reused by simply repeating simple preparation processes such as cleaning and coating. Even if the dimension of the thick part of the product changes somewhat, the variable skirting board configured at the other end extension of the internally cooled metal part expands and contracts to accommodate this, so even for different products. The chill can be widely used.
［実施例］ 以下、図に基づいて本考案の実施例を説明する。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
第１図は鋳造された成品１０とこれに鋳包まれた状態の
冷し金２０を示すものである。成品１０は第２図に示し
たものと同様ボス１２、ディスクリブ１４及びリム１６
からなる歯車材を例示しており、厚肉部のボス１２と薄
肉部のディスクリブ１４とはかなり大きな肉厚差を有し
ている。図では明らかではないが該成品１０の鋳造用砂
型は湯口、湯道、堰を介してリム１６の外周面部分から
溶湯が供給されるようになされている。FIG. 1 shows a cast product 10 and a chill 20 in a state in which it is cast and wrapped. The product 10 has a boss 12, a disc rib 14 and a rim 16 similar to those shown in FIG.
The boss 12 of the thick portion and the disc rib 14 of the thin portion have a considerably large thickness difference. Although not clear in the drawing, the casting sand mold of the product 10 is configured such that the molten metal is supplied from the outer peripheral surface portion of the rim 16 via the sprue, runner and weir.
冷し金２０は上型方向に向けて先細り状となる抜け勾配
を付与されて実質的に鋳抜き孔成形用中子の機能を兼備
する内冷し金部分２２を有し、該冷し金部分２２の下端
はボス１２の下端面との十分な接触面２４ａ及び相応の
容積をもつ固定幅木を兼ねた外冷し金部分２４と一体的
に結合されている。したがって該内冷し金部分２２及び
外冷し金部分２４によって厚肉部の冷却凝固が良好に促
進され、押湯の省略にもかかわらず十分な引け巣欠陥の
防止機能に加えて、安定した中子の保持機能を発揮す
る。そして上記内冷し金部分２２の上端はボス１２の上
端面から幾分長めに延出して可変幅木２６を構成し、該
可変幅木２６がボス１２の肉厚変化に呼応して伸縮する
ことにより、わずかに肉厚を異にする成品に対しても該
冷し金２０の共通使用を可能としている。The chill 20 has an inner chill portion 22 which is provided with a draft which tapers toward the upper die direction and which substantially has the function of a core for forming a casting hole. The lower end of the portion 22 is integrally connected to an outer cooling metal portion 24 which also serves as a fixed skirting board having a sufficient contact surface 24a with the lower end surface of the boss 12 and a corresponding volume. Therefore, the inner-cooled metal portion 22 and the outer-cooled metal portion 24 favorably promote the cooling and solidification of the thick wall portion, and in addition to the sufficient function of preventing the shrinkage cavity defect in spite of the omission of the feeder, it is stable. Demonstrate the retention function of the core. The upper end of the inner cooling metal part 22 extends a little longer than the upper end surface of the boss 12 to form a variable skirting board 26, and the variable skirting board 26 expands and contracts in response to a change in the thickness of the boss 12. As a result, the chill 20 can be commonly used even for products having slightly different wall thicknesses.
図中とくに太線２８で示したのは少なくとも成品溶湯と
の接触面に施された例えば黒鉛系の塗型で、該冷し金２
０の焼付けを緩和すると同時に吹かれのような鋳造欠陥
の発生を防止している。In particular, a thick line 28 in the figure indicates, for example, a graphite-based coating mold applied to at least the contact surface with the molten product,
It alleviates the burning of 0 and at the same time prevents the occurrence of casting defects such as blow.
従って本考案冷し金によれば、押湯は勿論砂中子も使用
することなく、引け巣欠陥のない良好な球状黒鉛鋳鉄成
品を製造することができる。Therefore, according to the chill according to the present invention, a good spheroidal graphite cast iron product without shrinkage cavity defects can be manufactured without using a sand iron as well as a riser.
［考案の効果］ 以上詳述したように本考案冷し金は、厚肉部の冷却を中
心側及び端面側の双方から促進させる機能に加えて、鋳
抜き孔成形用中子及び可変幅木としての機能をも兼備
し、しかも溶湯との接触面には塗型を施したものである
から、以下に掲記する優れた効果を奏する。[Effect of the Invention] As described in detail above, the chill according to the present invention has the function of promoting the cooling of the thick portion from both the center side and the end face side, as well as the core for forming the casting hole and the variable skirting board. It also has the function of, and since the contact surface with the molten metal is coated, it has the excellent effects described below.
（１）押湯を使用することなく引け巣欠陥を十分に抑え
て、鋳造の歩留りを格段と向上させることができる。(1) Shrinkage cavity defects can be sufficiently suppressed without using a riser, and the casting yield can be significantly improved.
（２）砂子中の省略による経済的な利点にとどまらず、
中子の折損や傾き不良といった従来の欠点を解消でき
る。(2) Not only the economic advantages due to the omission in the sandbag,
It is possible to eliminate the conventional defects such as core breakage and tilt failure.
（３）固定幅木が厚肉部端面との十分な接触面及び相応
の容積をもつので鋳型に対する支持安定度が向上する。(3) Since the fixed skirting board has a sufficient contact surface with the end face of the thick portion and a corresponding volume, the stability of supporting the mold is improved.
（４）可変幅木としての機能により厚肉部寸法の異なる
類似成品に広く流用実施することができる。(4) Due to the function as a variable skirting board, it can be widely used for similar products having different thicknesses.
（５）塗型の施行により冷し金の焼付と同時に吹かれ等
の欠陥を確実に防止することができる。(5) By applying the coating type, defects such as blowing can be surely prevented at the same time as the chill is baked.
第１図は本考案冷し金と鋳造成品との関係の一実施例を
示す一部断面図、第２図は従来のウォッシュバーン中子
と鋳造成品との関係を示す断面図、第３図はウォッシュ
バーン中子の変形例を示す正面図である。 １０……成品、１２……ボス ２０……冷し金、２２……内冷し金部分 ２４……外冷し金部分 ２６……可変幅木、２８……塗型FIG. 1 is a partial sectional view showing an embodiment of the relationship between a chill according to the present invention and a cast product, FIG. 2 is a sectional view showing a relationship between a conventional washburn core and a cast product, and FIG. FIG. 8 is a front view showing a modified example of the washburn core. 10 …… Product, 12 …… Boss 20 …… Cold money, 22 …… Inner cooled metal part 24 …… Outer cooled metal part 26 …… Variable skirting board, 28 …… Coating type
───────────────────────────────────────────────────── フロントページの続き (72)考案者 友原 信二 愛知県刈谷市豊田町２丁目１番地 株式会 社豊田自動織機製作所内 (56)参考文献 特開 昭53−73426（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinji Tomohara, 2-chome, Toyota-cho, Kariya city, Aichi Prefecture Toyota Industries Corporation (56) Reference JP-A-53-73426 (JP, A)
Claims (1)
に装入される冷し金であって、該冷し金は抜け勾配を有
して実質的に上記鋳抜き孔を成形する内冷し金部分と、
該内冷し金部分の一端に連接して上記厚肉部端面との十
分な接触面及び容積をもつ固定幅木兼用の外冷し金部分
とを備え、該内冷し金部分の上記厚肉部を越える他端延
出部が、該厚肉部の寸法変化に対応する可変幅木を構成
するとともに、該冷し金の少なくとも成品溶湯との接触
面に塗型を施したことを特徴とする鋳造用冷し金。1. A chill which is inserted into a casting sand mold of a product having a cast hole in a thick portion, wherein the chill has a draft angle and is substantially the same as the cast hole. The inner chilled part to be molded,
The inner cooling part has an outer cooling part which is connected to one end of the inner cooling part and has a sufficient contact surface with the end face of the thick part and has a volume and also serves as a fixed skirting board. The other end extending portion beyond the meat portion constitutes a variable skirting board corresponding to the dimensional change of the thick wall portion, and at least the contact surface of the chill metal with the molten product is coated. Chiller for casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987086464U JPH064995Y2 (en) | 1987-06-03 | 1987-06-03 | Chill for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987086464U JPH064995Y2 (en) | 1987-06-03 | 1987-06-03 | Chill for casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63196333U JPS63196333U (en) | 1988-12-16 |
| JPH064995Y2 true JPH064995Y2 (en) | 1994-02-09 |
Family
ID=30942793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987086464U Expired - Lifetime JPH064995Y2 (en) | 1987-06-03 | 1987-06-03 | Chill for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064995Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074646B2 (en) * | 1989-02-20 | 1995-01-25 | リョービ株式会社 | Sand core for high pressure casting and method for producing the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5373426A (en) * | 1976-12-14 | 1978-06-29 | Honda Motor Co Ltd | Casting method |
-
1987
- 1987-06-03 JP JP1987086464U patent/JPH064995Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63196333U (en) | 1988-12-16 |
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