JPS60196246A - Production of casting mold - Google Patents
Production of casting moldInfo
- Publication number
- JPS60196246A JPS60196246A JP59053097A JP5309784A JPS60196246A JP S60196246 A JPS60196246 A JP S60196246A JP 59053097 A JP59053097 A JP 59053097A JP 5309784 A JP5309784 A JP 5309784A JP S60196246 A JPS60196246 A JP S60196246A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- mold
- parts
- peripheral part
- outer peripheral
- 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.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は鋳物の製造方法に関する。更に詳しくは本発明
は、ある特定の形状を有する鋳型を用いて欠陥のない鋳
物を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a casting. More specifically, the present invention relates to a method for manufacturing defect-free castings using a mold having a specific shape.
現在、稽々の形状の鋳物が製造されており、従ってこれ
に対応する鋳型の形状も千差万別である。Currently, castings of various shapes are being manufactured, and therefore the shapes of molds corresponding to these molds also vary widely.
かかる鋳型は例えば炭酸ガス、アミンガスあるいは亜硫
酸ガス等のガスを用いてフラン樹脂、水ガラス、ウレタ
ン樹脂等のガス硬化性粘結剤を含有する鋳物砂を硬化さ
せて鋳型を製造する方法(ガス硬化法)により製造され
るが、この方法はガスを吹き込むまでは鋳物砂は全く硬
化しないので、形状が複雑で造型に長時間を要する鋳型
の製造に有用であり、また、ガスを吹き込むとほぼ瞬時
に鋳物砂が硬化して所望の鋳型が短時間で得られるので
、比較的小さい鋳型の多量生産に特に有利である。Such molds are produced by curing molding sand containing a gas-curing binder such as furan resin, water glass, or urethane resin using a gas such as carbon dioxide gas, amine gas, or sulfur dioxide gas (gas curing method). However, in this method, the molding sand does not harden at all until gas is blown into it, so it is useful for manufacturing molds with complex shapes that require a long time to mold. Since the foundry sand hardens and the desired mold can be obtained in a short time, it is particularly advantageous for mass production of relatively small molds.
本発明者は、かかる鋳物砂を硬化させた鋳型を用いて種
々の鋳物の製造を行ってきたが、第1図に示されるよう
な、一つに連なった外周部1と、その内側に外周部1と
は間隔をおいて設置される内部分2と、これら外周部と
内部分を連結する2個以上の連結部5とを有する形状の
鋳型に注湯して鋳物を製造する場合に、連結部5に対応
する鋳物の部分に変形おるいはうねりが生じて、鋳物が
欠陥品となることを度々経験した。これは注湯時あるい
は注湯してから湯が冷却されていく通程において、何ら
かの要因により、連結部5が変形しそれが鋳物の変形又
はうねりの原因につながるものと推定される。そこで本
発明者は、連結部3に対応する鋳物の部分に変形あるい
はうねりが生じない鋳物の製造について種々比較検討を
行った。本発明はこれら比較検討実験で得られた知見に
基づいてなされたものである。The present inventor has manufactured various castings using molds made of hardened foundry sand, and as shown in FIG. When manufacturing a casting by pouring into a mold having a shape that has an inner part 2 installed at a distance from part 1, and two or more connecting parts 5 that connect these outer peripheral parts and the inner part, I have often experienced deformation or waviness in the part of the casting corresponding to the connecting portion 5, resulting in the casting being defective. It is presumed that this is because the connecting portion 5 is deformed due to some factor during pouring or during the cooling process after pouring, which leads to deformation or waviness of the casting. Therefore, the present inventor conducted various comparative studies on manufacturing a casting that does not cause deformation or waviness in the part of the casting that corresponds to the connecting portion 3. The present invention has been made based on the findings obtained from these comparative studies.
すなわち本発明は、前記第1図に示されるように、連続
する一体部を形成する外周部1と、該外周部1とは間隔
をおいて外周部の内側に設置される内部分2と、これら
外周部と内部分を連結する連結部5を2個以上有する形
状の鋳型に注湯して鋳物を製造するに際して、外周部に
2個以上の欠切(ノツチ)4を設けることを特徴とする
鋳物の製造方法を提供するものである〇そこで本発明の
方法を第2図に示した実施態様について説明すると、第
2図に於て本発明に用いる外周部(外周ブロック)1、
内部分(内ブロック)2及び連結部3からなる特定の形
状の鋳型は中子として用いられ、上型1o及び下ull
o間にセットされ、定盤12の上に設置される。13は
金枠、14は湯口、15は湯道、16はせきであり、5
、6.、7及び8がキャビティであって、こ瓦に湯道
15から溶湯が入って製品となる。この中子の外周部1
に第1図に示す如く切欠4が設けられると、連結部5に
対応する鋳物の部分に変形が発止することがない。That is, as shown in FIG. 1, the present invention comprises: an outer peripheral part 1 forming a continuous integral part; an inner part 2 disposed inside the outer peripheral part with a distance from the outer peripheral part 1; When manufacturing a casting by pouring metal into a mold having two or more connecting parts 5 connecting the outer peripheral part and the inner part, two or more notches 4 are provided in the outer peripheral part. The method of the present invention will be described with reference to the embodiment shown in FIG. 2. In FIG.
A mold with a specific shape consisting of an inner part (inner block) 2 and a connecting part 3 is used as a core, and has an upper mold 1o and a lower mold 1o.
o and placed on the surface plate 12. 13 is the metal frame, 14 is the sprue, 15 is the runner, 16 is the weir, and 5
,6. , 7 and 8 are cavities, and the molten metal enters the tile from the runner 15 to form a product. Outer periphery 1 of this core
If the notch 4 is provided as shown in FIG. 1, the part of the casting corresponding to the connecting part 5 will not be deformed.
第2図の鋳型で得られる鋳物は自動車用ディスクブレー
キ部品として用いられるものである。The castings obtained with the mold shown in FIG. 2 are used as disc brake parts for automobiles.
本発明においては、第1図に示される形状の鋳型の外周
部に2個以上の欠切を設げることによジ効果が発現する
が、さらに詳細に検討したところ次の場合にはその効果
がさらに大きくなることがわかった。すなわち;
(1) 切欠の深さ全外周部の厚さ号以上、好ましくは
%以上にした場合、
(2) 外周部の平面形状が円形又はだ円形の場合、特
に第1図の外周部1の外縁1a及び内R1bが倒れも円
形又はだ円形のもの(即ち全体が円環状又はだ円環状)
の場合、
(3) 外周部の任意の部分の垂直断面積(第1図に於
てA−A線で切断した時の断面積全意味する)が、連結
部の任意の部分の垂直断面積(第1図においてB−B’
線で切断した時の断面積全意味する)工9も大きい場合
、
である。In the present invention, the effect is produced by providing two or more cutouts on the outer periphery of the mold having the shape shown in Fig. 1, but a more detailed study revealed that the It was found that the effect was even greater. That is: (1) When the depth of the notch is greater than or equal to the thickness of the entire outer periphery, preferably % or more, (2) When the planar shape of the outer periphery is circular or oval, especially the outer periphery 1 in Figure 1. The outer edge 1a and the inner R1b are also circular or oval (i.e., the whole is circular or oval)
(3) The vertical cross-sectional area of any part of the outer periphery (meaning the entire cross-sectional area when cut along line A-A in Figure 1) is the vertical cross-sectional area of any part of the connecting part. (B-B' in Figure 1
If the total cross-sectional area (meaning the total cross-sectional area when cut along the line) is also large, then .
本発明の実施に当っては、内部分2及び連結部5の形状
には特に限定はなく、又連結部5は2個以上の多l5I
t設けることができる。In carrying out the present invention, there are no particular limitations on the shapes of the inner portion 2 and the connecting portion 5, and the connecting portion 5 may include two or more polygons.
t can be provided.
切欠4の形状については特に制限はないが、クサビ型の
切欠を設けることが形状的に最も簡単である。切欠の数
は2個以上あればよく、連結部5の数の増加と共に増加
させるが、連結部の数と同数かあるいはそれよりも少な
い数でよい。実際には2〜16個程度でよい。切欠を設
ける位置は、外周部の外縁に沿って内側へ向けて設けら
れ切欠がなるべ(等間隔となるようKすることが好まし
い。Lζ切久4の先端部分が連結部3の端と重ならない
ようにした方が↓い。第5図には切欠4と連結部5が重
なった状態を示す。Although there is no particular restriction on the shape of the notch 4, providing a wedge-shaped notch is the simplest shape. The number of notches may be two or more, and increases as the number of connecting parts 5 increases, but the number may be the same as the number of connecting parts or smaller than that. Actually, about 2 to 16 pieces may be sufficient. The notches are preferably placed inward along the outer edge of the outer periphery so that the notches are evenly spaced. It is better to avoid this. Fig. 5 shows a state in which the notch 4 and the connecting portion 5 overlap.
以下本発明を実施例及び比較例について説明するが、本
発明はこれらの例により限定されるものではない。The present invention will be described below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
実施例
第2図に縦断面図を示し次続型を用い、これに溶鉄(F
e12) を鋳込み鋳物を製造した。第4図は中子に用
いた本発明の鋳型の平面図で、外周部1は円形でその外
径は345m、外周部の幅は22m5.厚さは42M@
、断面積924 m2、内部分2の径はj90111厚
さは46鵡、連結部3は全部で36個等間隔に設げられ
、その外周部1との接続端の幅は20m11.内部分2
との接続端の幅は101m、断面形状はだ円形で断面積
は最小で約100 yen2、最大で約20 Q II
2、ノツチ4の数は8個で外周部1の外縁円周上にほぼ
等間隔に且つ連結部5とは重ならない様に設けられた。Example Fig. 2 shows a vertical cross-sectional view, and a continuous type was used, and molten iron (F
e12) was cast to produce a casting. FIG. 4 is a plan view of the mold of the present invention used for the core, and the outer circumferential portion 1 is circular with an outer diameter of 345 m and a width of 22 m5. Thickness is 42M@
, the cross-sectional area is 924 m2, the diameter of the inner part 2 is j90111, the thickness is 46 m2, a total of 36 connecting parts 3 are provided at equal intervals, and the width of the connecting end with the outer peripheral part 1 is 20 m11. inner part 2
The width of the connecting end is 101 m, the cross-sectional shape is oval, and the cross-sectional area is approximately 100 yen2 at the minimum and approximately 20 Q II at the maximum.
2. The number of notches 4 is eight, and they are provided on the outer circumference of the outer circumferential portion 1 at approximately equal intervals and so as not to overlap with the connecting portion 5.
ノツチ4の平面形状はくさび形でその先端と外周部の内
縁1bとの距離は12111であった。得られた鋳物は
、連結部3に対応する部分に変形が全く発生せず欠陥の
ないものであった。The notch 4 had a wedge-shaped planar shape, and the distance between its tip and the inner edge 1b of the outer circumference was 12,111. The obtained casting had no deformation at all in the portion corresponding to the connecting portion 3 and was free from defects.
比較例
ノツチ4を全く入れない鋳型を用いて、同様に鋳込み鋳
物を製造した。連結部5に対応する部分(全36個)中
16個につき変形が発生し、不良鋳物となった。Comparative Example A casting was produced in the same manner using a mold in which notch 4 was not inserted at all. Deformation occurred in 16 of the parts (36 in total) corresponding to the connecting part 5, resulting in defective castings.
第1図は本発明に用いられる鋳型形状の一例を示す斜視
図、第2図は鋳物製造時の状態を示す略示縦断面図、第
3図は切欠の配置を説明する鋳型の部分斜視図、第4図
は本発明の鋳型の平面図である。
1・・・外周部 2・・・内部分
3・・・連結部 4・・・切欠
出願人代理人 古 谷 馨
第1図
第 2 図
第 3 図
り
第 4 図
へFig. 1 is a perspective view showing an example of the shape of the mold used in the present invention, Fig. 2 is a schematic vertical sectional view showing the state during manufacturing of castings, and Fig. 3 is a partial perspective view of the mold illustrating the arrangement of notches. , FIG. 4 is a plan view of the mold of the present invention. 1... Outer circumferential part 2... Inner part 3... Connecting part 4... Notch Applicant Kaoru Furuya Figure 1 Figure 2 Figure 3 Diagram Figure 4
Claims (1)
てその内側に設けられた内部分と、外周部と内部分を連
結する2個以上の連結部とを有する鋳型に注湯して鋳物
を製造するに際して、外周部に2個以上の切欠(ノツチ
)を設けることを特徴とする鋳物の製造方法。 2、 切欠が外周部の外縁から内側へむけて設けられ、
その深さが外周部分の厚さの%以上である特許請求の範
囲第1項記載の鋳物の製造方法。 乙 鋳型の外周部の平面形状が円形又はだ円形である特
許請求の範囲第1項又は第2項記載の鋳物の製造方法。 4、 鋳型の外周部の任意部分の垂直断面積が、連結部
の任意の部分の垂直断面積よりも大きい特許請求の範囲
比1項乃至第5項の何れか1項に記載の鋳物の製造方法
。[Claims] 1. A continuous outer peripheral part, an inner part provided inside the outer peripheral part at intervals, and two or more connecting parts connecting the outer peripheral part and the inner part. 1. A method for producing a casting, characterized in that two or more notches are provided in the outer periphery of the casting when the casting is produced by pouring into a mold having a mold. 2. A notch is provided inward from the outer edge of the outer periphery,
The method for manufacturing a casting according to claim 1, wherein the depth is at least % of the thickness of the outer peripheral portion. B. The method for manufacturing a casting according to claim 1 or 2, wherein the planar shape of the outer periphery of the mold is circular or oval. 4. Manufacturing a casting according to any one of claims 1 to 5, wherein the vertical cross-sectional area of any part of the outer periphery of the mold is larger than the vertical cross-sectional area of any part of the connecting part. Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59053097A JPS60196246A (en) | 1984-03-19 | 1984-03-19 | Production of casting mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59053097A JPS60196246A (en) | 1984-03-19 | 1984-03-19 | Production of casting mold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60196246A true JPS60196246A (en) | 1985-10-04 |
Family
ID=12933276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59053097A Pending JPS60196246A (en) | 1984-03-19 | 1984-03-19 | Production of casting mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60196246A (en) |
-
1984
- 1984-03-19 JP JP59053097A patent/JPS60196246A/en active Pending
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