JPH0739993A - Structure of metallic mold for casting - Google Patents
Structure of metallic mold for castingInfo
- Publication number
- JPH0739993A JPH0739993A JP19227093A JP19227093A JPH0739993A JP H0739993 A JPH0739993 A JP H0739993A JP 19227093 A JP19227093 A JP 19227093A JP 19227093 A JP19227093 A JP 19227093A JP H0739993 A JPH0739993 A JP H0739993A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- casting
- cavity space
- molten metal
- heating
- 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
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は鋳造用金型構造に関し、
詳しくはキャビティ空間に注湯された溶湯を加熱又は冷
却することが可能な金型構造に関する。BACKGROUND OF THE INVENTION The present invention relates to a casting mold structure,
More specifically, it relates to a mold structure capable of heating or cooling the molten metal poured into the cavity space.
【０００２】[0002]
【従来の技術】鋳造においては、キャビティの厚肉部と
薄肉部で凝固速度が異なり、厚肉部の方が薄肉部より凝
固が遅くなる。そのために内部応力が発生し、鋳造品内
部に引け巣欠陥が発生する場合がある。そこで特開昭６
２−３３０５４号公報には、厚肉部の金型に冷却手段
を、薄肉部の金型に加熱手段を配設した金型構造が開示
されている。このようにすれば、厚肉部と薄肉部の凝固
速度を調整する指向性凝固制御を行うことができ、引け
巣欠陥が防止される。2. Description of the Related Art In casting, the solidification rate differs between the thick-walled portion and the thin-walled portion of the cavity, so that the thick-walled portion is slower than the thin-walled portion. As a result, internal stress may be generated and shrinkage cavity defects may occur inside the cast product. Therefore, JP-A-6
Japanese Unexamined Patent Publication No. 2-33054 discloses a mold structure in which cooling means is provided in a thick mold and heating means is provided in a thin mold. By doing so, it is possible to perform the directional solidification control that adjusts the solidification rate of the thick portion and the thin portion, and the shrinkage cavity defect is prevented.
【０００３】また金型重力鋳造法では、引け巣欠陥を抑
制するために、図５に示すように厚肉部１０１及び薄肉
部１０２からなるキャビティ空間の上部に押湯を注入す
る押湯部１０３を設置したり、冷却手段１０４で金型１
００を冷却することが行われている。Further, in the die gravity casting method, in order to suppress shrinkage cavity defects, as shown in FIG. 5, a riser portion 103 for injecting riser into the upper part of the cavity space consisting of the thick wall portion 101 and the thin wall portion 102. Or install mold 1 with cooling means 104
00 is being cooled.
【０００４】[0004]
【発明が解決しようとする課題】ところが特開昭６２−
３３０５４号公報に開示された金型構造では、溶湯の加
熱・冷却は加熱手段及び冷却手段と溶湯の間に介在する
金型を介して行われるため、応答性が悪く指向性凝固制
御に限界があった。また金型重力鋳造法では、押湯部１
０３の容量を大きくすることで押湯の凝固を遅らせ、キ
ャビティ空間内の溶湯が凝固するまでの間押湯からの重
力が作用するように構成する必要がある。そのため金型
が大型となり、また押湯の凝固時間が長くなるという問
題がある。また金型を冷却しても、金型の熱容量が大き
いために局部的な、あるいは急激な型温の制御は困難で
あった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the mold structure disclosed in Japanese Unexamined Patent Publication No. 33054, heating / cooling of the molten metal is performed through a mold interposed between the heating means and the cooling means and the molten metal, so that the responsiveness is poor and the directional solidification control is limited. there were. In addition, in the die gravity casting method, the feeder part 1
It is necessary to delay the solidification of the feeder by increasing the volume of 03, and to make the gravity from the feeder act until the molten metal in the cavity space solidifies. Therefore, there is a problem that the die becomes large and the solidification time of the feeder becomes long. Even if the mold is cooled, it is difficult to control the mold temperature locally or rapidly because the mold has a large heat capacity.
【０００５】本発明はこのような事情に鑑みてなされた
ものであり、キャビティ空間内の溶湯を直接的に加熱・
冷却できるようにすることを目的とする。The present invention has been made in view of the above circumstances and directly heats the molten metal in the cavity space.
The purpose is to be able to cool.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決する本発
明の鋳造用金型構造は、キャビティ空間を形成する金型
の一部にキャビティ空間と外部とを連通する細孔を多数
有する入れ子を配置し、入れ子の背面にキャビティ空間
内の溶湯を加熱又は冷却する手段を設けたことを特徴と
する。In the casting mold structure of the present invention for solving the above-mentioned problems, a part of a mold forming a cavity space has a nest having a large number of pores for communicating the cavity space with the outside. It is characterized in that a means for heating or cooling the molten metal in the cavity space is provided on the back surface of the insert.
【０００７】[0007]
【作用】本発明の鋳造用金型構造では、多数の細孔を有
する入れ子が用いられ、細孔がキャビティ空間と外部と
を連通している。そして入れ子の背面には加熱・冷却手
段が設けられている。したがって加熱・冷却手段から噴
出された火炎などの加熱媒体、あるいは冷風などの冷却
媒体は、細孔を通って直接キャビティ空間内の溶湯に接
触し、溶湯を直接的に加熱又は冷却する。In the casting mold structure of the present invention, a nest having a large number of pores is used, and the pores communicate the cavity space with the outside. A heating / cooling means is provided on the back surface of the insert. Therefore, a heating medium such as a flame ejected from the heating / cooling means or a cooling medium such as cold air directly contacts the molten metal in the cavity space through the pores to directly heat or cool the molten metal.
【０００８】[0008]
【実施例】以下、実施例により具体的に説明する。図１
に本発明の一実施例の金型構造を示す。この金型構造
は、複数の分割型からなる金型本体１と、多数の細孔を
有する複数の入れ子２と、加熱手段３及び冷却手段４と
から構成されている。EXAMPLES The present invention will be specifically described below with reference to examples. Figure 1
The mold structure of one embodiment of the present invention is shown in FIG. This mold structure is composed of a mold body 1 composed of a plurality of split molds, a plurality of inserts 2 having a large number of pores, a heating means 3 and a cooling means 4.
【０００９】金型本体１は複数の分割型から構成され、
中央にキャビティ空間５が形成されている。このキャビ
ティ空間５は、厚肉部５０と、薄肉部５１及び鋳造後切
除される押湯部５２から構成されている。そして押湯部
５２及び厚肉部５０を形成する金型本体１には、複数の
入れ子穴１０が形成されている。入れ子２は、図２に示
すように直径２ｍｍのワイヤ２０が複数本束ねられ、外
周部の溶接された溶接部２２で一体化されている。全体
形状は、一般に直径２０〜３０ｍｍ、長さ５０〜１００
ｍｍの略円柱状に形成することができるが、特に制限は
なく、今回は直径３０ｍｍ，長さ６０ｍｍとした。この
入れ子２では、ワイヤ２０どうしの間の間隙が細孔２１
となり、多数の細孔２１が形成されている。The mold body 1 is composed of a plurality of split molds,
A cavity space 5 is formed in the center. The cavity space 5 is composed of a thick portion 50, a thin portion 51, and a riser portion 52 that is cut off after casting. A plurality of nesting holes 10 are formed in the mold body 1 forming the feeder part 52 and the thick part 50. As shown in FIG. 2, a plurality of wires 20 each having a diameter of 2 mm are bundled in the insert 2, and the insert 2 is integrated by a welded portion 22 welded on the outer peripheral portion. The overall shape is generally 20-30 mm in diameter and 50-100 in length.
Although it can be formed in a substantially cylindrical shape of mm, there is no particular limitation, and this time, the diameter is 30 mm and the length is 60 mm. In this nest 2, the gap between the wires 20 is the pore 21.
Therefore, a large number of pores 21 are formed.
【００１０】この入れ子２は、図３に拡大して示すよう
に金型本体１の入れ子穴１０にそれぞれ埋め込まれ、入
れ子２の一端面２３がキャビティ面１１の一部を構成し
ている。加熱手段３はガスバーナーにより形成された火
炎を噴射するものであり、約８００℃の火炎が入れ子２
の一端面２３と反対側の背面に向かって噴射される構造
である。この加熱手段３は、押湯部５２を構成する金型
本体１の入れ子穴１０に設けられている。As shown in the enlarged view of FIG. 3, the inserts 2 are embedded in the insert holes 10 of the mold body 1, and one end face 23 of the insert 2 constitutes a part of the cavity face 11. The heating means 3 is for injecting a flame formed by a gas burner, and a flame of about 800 ° C.
In this structure, the jetting is performed toward the back surface on the side opposite to the one end surface 23. The heating means 3 is provided in the insert hole 10 of the mold body 1 which constitutes the feeder part 52.
【００１１】冷却手段４は空気を噴出するノズルであ
り、入れ子２の背面に向かって室温の空気を噴出する。
この冷却手段４は、厚肉部５０を構成する金型本体１の
入れ子穴１０に設けられている。上記のように構成され
た本実施例の金型構造を用い、加熱手段３及び冷却手段
４を作動させながら鋳造を行った。そして押湯部５２，
上側の薄肉部５１及び厚肉部５０の溶湯の凝固時間をそ
れぞれ測定し、結果を図４に示す。The cooling means 4 is a nozzle for ejecting air, and ejects room temperature air toward the back surface of the insert 2.
The cooling means 4 is provided in the nesting hole 10 of the mold body 1 forming the thick wall portion 50. Using the mold structure of this example configured as described above, casting was performed while operating the heating means 3 and the cooling means 4. And the feeder part 52,
The solidification times of the molten metal in the upper thin portion 51 and the thick portion 50 were measured, and the results are shown in FIG.
【００１２】また、比較のために図５に示す従来の金型
構造を用い、冷却手段１０４から空気を噴出して金型本
体１００を冷却しながら鋳造を行った。そして上記と同
様に押湯部１０３、上側の薄肉部１０２及び厚肉部１０
１の溶湯の凝固時間をそれぞれ測定し、結果を図４に示
す。なお、押湯部１０３の容積は実施例の押湯部５２の
容積の３．５倍であり、薄肉部１０２及び厚肉部１０１
は実施例と同一容積である。For comparison, the conventional mold structure shown in FIG. 5 was used, and air was blown from the cooling means 104 to cool the mold main body 100 while performing casting. Then, similarly to the above, the feeder section 103, the upper thin section 102 and the thick section 10
The solidification time of the molten metal of No. 1 was measured, and the results are shown in FIG. The volume of the feeder portion 103 is 3.5 times the volume of the feeder portion 52 of the embodiment, and the thin portion 102 and the thick portion 101 are provided.
Is the same volume as the example.
【００１３】図４より、実施例の金型構造の方が従来よ
り凝固時間が短いことが明らかである。そして実施例の
金型構造では、指向性凝固も達成されていることが分か
る。From FIG. 4, it is clear that the mold structure of the embodiment has a shorter solidification time than the conventional one. It can be seen that the mold structure of the example also achieves directional solidification.
【００１４】[0014]
【発明の効果】したがって本発明の鋳造用金型構造によ
れば、キャビティ空間内の溶湯の加熱・冷却の制御が容
易となり、指向性凝固制御を容易に行うことができるた
め、引け巣欠陥などを一層防止することができる。その
ため鋳造組織が細かく、高強度及び高靱性の鋳造物を形
成することができる。As described above, according to the casting mold structure of the present invention, the heating / cooling of the molten metal in the cavity space can be easily controlled, and the directional solidification control can be easily performed. Can be further prevented. Therefore, the cast structure is fine and a cast product having high strength and high toughness can be formed.
【００１５】また金型重力鋳造法の場合には、入れ子を
押湯部分に設けることで押湯を直接的に加熱することが
できる。したがって容量が小さくても凝固時間を遅らせ
ることができ、金型の大きさを従来に比べて小さくする
ことができる。さらに、局部的なあるいは急激な加熱・
冷却が可能となるため、従来困難であった温度制御が可
能となり鋳造の自由度が格段に向上する。Further, in the case of the die gravity casting method, the feeder can be directly heated by providing the insert in the feeder portion. Therefore, even if the volume is small, the coagulation time can be delayed and the size of the mold can be made smaller than in the conventional case. In addition, localized or sudden heating
Since cooling is possible, it is possible to control the temperature, which was difficult in the past, and the degree of freedom in casting is significantly improved.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例の金型構造の断面図である。FIG. 1 is a cross-sectional view of a mold structure according to an embodiment of the present invention.
【図２】本発明の一実施例の金型構造に用いた入れ子の
斜視図である。FIG. 2 is a perspective view of a nest used in a mold structure according to an embodiment of the present invention.
【図３】本発明の一実施例の金型構造の要部を断面で示
す斜視図である。FIG. 3 is a perspective view showing a cross section of a main part of a mold structure according to an embodiment of the present invention.
【図４】本発明の一実施例の金型構造と従来の金型構造
を用いて鋳造した際の、金型の各部位における溶湯の凝
固時間を示すグラフである。FIG. 4 is a graph showing the solidification time of the molten metal at each part of the mold when casting is performed using the mold structure of one example of the present invention and the conventional mold structure.
【図５】従来の金型構造の一例を示す断面図である。FIG. 5 is a cross-sectional view showing an example of a conventional mold structure.
１：金型本体 ２：入れ子
３：加熱手段 ４：冷却手段 ５：キャビティ空間 １
０：入れ子穴 １１：キャビティ面 ２０：ワイヤ ２
１：細孔 ５０：厚肉部 ５１：薄肉部 ５
２：押湯部1: Mold body 2: Nesting
3: heating means 4: cooling means 5: cavity space 1
0: Nesting hole 11: Cavity surface 20: Wire 2
1: Pore 50: Thick part 51: Thin part 5
2: riser section
Claims (1)
該キャビティ空間と外部とを連通する細孔を多数有する
入れ子を配置し、該入れ子の背面に該キャビティ空間内
の溶湯を加熱又は冷却する手段を設けたことを特徴とす
る鋳造用金型構造。1. A mold having a cavity space is provided with a nest having a large number of pores communicating between the cavity space and the outside, and the molten metal in the cavity space is heated or cooled on the back surface of the nest. A die structure for casting, characterized by being provided with a means for performing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19227093A JPH0739993A (en) | 1993-08-03 | 1993-08-03 | Structure of metallic mold for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19227093A JPH0739993A (en) | 1993-08-03 | 1993-08-03 | Structure of metallic mold for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0739993A true JPH0739993A (en) | 1995-02-10 |
Family
ID=16288489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19227093A Pending JPH0739993A (en) | 1993-08-03 | 1993-08-03 | Structure of metallic mold for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739993A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101143361B1 (en) * | 2010-02-25 | 2012-05-09 | 주식회사 동서기공 | Mold Assembly and Method for Casting the Same |
| CN107377880A (en) * | 2017-07-24 | 2017-11-24 | 绍兴市振杨机械有限公司 | A kind of mould of consecutive solidification when realizing gravitational casting |
-
1993
- 1993-08-03 JP JP19227093A patent/JPH0739993A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101143361B1 (en) * | 2010-02-25 | 2012-05-09 | 주식회사 동서기공 | Mold Assembly and Method for Casting the Same |
| CN107377880A (en) * | 2017-07-24 | 2017-11-24 | 绍兴市振杨机械有限公司 | A kind of mould of consecutive solidification when realizing gravitational casting |
| CN107377880B (en) * | 2017-07-24 | 2019-07-02 | 绍兴市振杨机械有限公司 | A kind of mold of consecutive solidification when realizing gravitational casting |
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