JPH0760398A - Die casting method - Google Patents
Die casting methodInfo
- Publication number
- JPH0760398A JPH0760398A JP5212441A JP21244193A JPH0760398A JP H0760398 A JPH0760398 A JP H0760398A JP 5212441 A JP5212441 A JP 5212441A JP 21244193 A JP21244193 A JP 21244193A JP H0760398 A JPH0760398 A JP H0760398A
- Authority
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- Japan
- Prior art keywords
- casting
- mold
- thermal conductivity
- cavity
- molten metal
- 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.)
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金型鋳造において鋳造
方案部の耐久性を向上させ、湯流れ性を良好にするよう
にした金型鋳造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting method for improving the durability of a casting plan portion and improving the flowability of molten metal in die casting.
【０００２】[0002]
【従来の技術】従来、例えば銅金型等の金型鋳造は砂型
鋳造に較べて熱伝導率が高く、溶湯を充填した後はやく
鋳造品を取り出すことが出来る等の利点を有しており、
生産性の向上の面からは有利である。2. Description of the Related Art Conventionally, for example, a metal mold casting has a high thermal conductivity as compared with a sand mold casting, and has an advantage that a cast product can be taken out quickly after being filled with molten metal.
This is advantageous in terms of productivity improvement.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、金型鋳
造の場合は急冷によって湯流れ不良が起きやすいため、
比較的高温の溶湯を注湯して湯流れ性を確保する必要が
あるが、特に高温の溶湯が最初に接触する方案部は高温
と低温の温度差が大きくなって熱的疲労を起こしやす
く、クラック等が発生しやすくなって金型寿命が短くな
るという問題があった。一方、溶湯の温度を制限して熱
的疲労の問題を避けようとすると湯流れ性を確保するた
め湯道径を太くする必要があり、材料の歩留り性を低下
させて経済性を損うという問題があった。However, in the case of die casting, defective cooling is likely to occur due to quenching,
It is necessary to inject molten metal of relatively high temperature to ensure the fluidity of the molten metal, but especially in the plan part where the molten metal of high temperature comes into contact first, the temperature difference between the high temperature and the low temperature becomes large and thermal fatigue easily occurs. There is a problem that cracks are likely to occur and the life of the mold is shortened. On the other hand, when trying to avoid the problem of thermal fatigue by limiting the temperature of the molten metal, it is necessary to increase the diameter of the runner in order to ensure the flowability of the molten metal, which reduces the yield of the material and impairs economic efficiency. There was a problem.
【０００４】[0004]
【課題を解決するための手段】かかる課題を解決するた
め、本発明は金型の鋳造方案部を金型母材より熱伝導率
の低い部材で構成し、この熱伝導率の低い部材をキャビ
ティ近傍まで臨ませて鋳造するようにした。また、熱伝
導率の低い部材をキャビティの一部にも臨ませるように
した。In order to solve the above-mentioned problems, the present invention comprises a casting plan portion of a mold made of a member having a lower thermal conductivity than a mold base material, and the member having a lower thermal conductivity is a cavity. It was made to face up to the neighborhood and cast. Also, a member having a low thermal conductivity is made to face a part of the cavity.
【０００５】[0005]
【作用】高温の溶湯に接触する鋳造方案部を金型母材よ
り熱伝導率の低い部材で構成しているので、鋳造方案部
を金型母材と同一の材質で構成する場合に較べてショッ
ト時の金型の最高温度と最低温度の温度差が小さくな
り、熱的疲労を起こしにくい。すなわち、金型寿命を延
ばすことが出来る。また、鋳造方案部の湯流れ性が確保
される。そして、熱伝導率の低い部材をキャビティ近傍
まで臨ませることで、押湯効果も向上し鋳造品質を高め
ることが出来る。また、例えばキャビティの形状が複雑
なような時には、熱伝導率の低い部材をキャビティの一
部にも臨ませることで、キャビティ内の湯廻り性が良好
となり、引け巣等の防止に効果がある。[Operation] Since the casting plan part that comes into contact with the molten metal at a high temperature is composed of a member having a lower thermal conductivity than the mold base material, compared to the case where the casting plan part is composed of the same material as the mold base material. The temperature difference between the maximum temperature and the minimum temperature of the mold during shots is small, and thermal fatigue is unlikely to occur. That is, the life of the mold can be extended. Further, the flowability of the casting plan portion is secured. By exposing a member having a low thermal conductivity to the vicinity of the cavity, the effect of the feeder is improved and the casting quality can be improved. Further, for example, when the shape of the cavity is complicated, by exposing a member having low thermal conductivity to a part of the cavity, the hot water flowability in the cavity is improved and shrinkage cavities are effectively prevented. .
【０００６】[0006]
【実施例】本発明の金型鋳造法の実施例について添付し
た図面に基づき説明する。図１は本発明に係る金型の第
１の構成例図、図２は第１の構成例の別実施例図であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the die casting method of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a diagram showing a first structural example of a mold according to the present invention, and FIG. 2 is a diagram showing another example of the first structural example.
【０００７】本発明の金型鋳造法は、例えば図１に示す
ような鋳造金型１によって鋳造される方法であり、この
鋳造金型１は、型締め、型開き自在な一対の金型２、３
を備え、この金型２、３は例えば銅合金を母材としてい
る。The die casting method of the present invention is a method of casting by a casting die 1 as shown in FIG. 1, for example. The casting die 1 is a pair of dies 2 which can be clamped and opened. Three
The molds 2 and 3 have, for example, a copper alloy as a base material.
【０００８】各金型２、３の型合せ面には製品を成形す
るキャビティ４と、このキャビティ４に連なる鋳造方案
部５が形成されている。A cavity 4 for molding a product and a casting pattern portion 5 connected to the cavity 4 are formed on the die-matching surfaces of the respective dies 2, 3.
【０００９】そしてこの鋳造方案部５は、上面に向けて
開口する湯口６と、湯口底７から左右に分岐する水平湯
道８と、この水平湯道８とキャビティ４を連通する枝湯
道９からなり、湯口６から注湯した溶湯を水平湯道８、
枝湯道９を通してキャビティ４に導くようにしている。The casting plan portion 5 has a sprue 6 that opens toward the upper surface, a horizontal runner 8 that branches left and right from a spout bottom 7, and a branch runner 9 that connects the horizontal runner 8 and the cavity 4. The molten metal poured from the sprue 6 and the horizontal runner 8,
The branch runner 9 is introduced to the cavity 4.
【００１０】ところで、本案の場合は、鋳造方案部５を
熱伝導率の低い入子１０で構成している。By the way, in the case of the present invention, the casting plan portion 5 is constituted by the insert 10 having a low thermal conductivity.
【００１１】すなわち、この入子１０は実施例の場合レ
ジン砂を粘結したシェル入子であり、予め金型２、３に
鋳造方案部５の径より太い径で彫り込んだ箇所に嵌め込
むことが出来るようにしている。That is, in the case of this embodiment, the insert 10 is a shell insert in which resin sand is kneaded, and it is fitted in the molds 2 and 3 previously engraved with a diameter larger than the diameter of the casting plan portion 5. I can do it.
【００１２】そして、この入子１０の先端は枝湯道９の
途中まで延出させてキャビティ４近傍に臨ませている。The tip of the insert 10 extends partway along the branch runner 9 to face the vicinity of the cavity 4.
【００１３】また、この入子１０は実施例のように両方
の金型２、３に夫々分割した状態で嵌め込んでセットし
ても良いし、或いは両方の入子１０、１０を合せて一体
の形状で成形し、いずれかの金型２、３にセットするよ
うにしてもよい。The insert 10 may be set by fitting it into both molds 2 and 3 in a divided state as in the embodiment, or may be integrated by combining both inserts 10 and 10. You may make it shape | mold with this shape and set it in either metal mold | die 2,3.
【００１４】また、多数個取りの場合は図２のように構
成することも出来る。Further, in the case of taking a large number of pieces, it can be configured as shown in FIG.
【００１５】すなわち、この金型２（或いは３）は、鋳
造方案部５として縦湯道１２から左右に分岐する多数の
枝湯道１３を備え、同時に多数のキャビティ４に溶湯を
導いて多数個を同時に鋳造出来るようにしているが、こ
の場合の入子１４は、図２（ロ）に示すように、縦湯道
１２と枝湯道１３の一部を大きく包む状態で矩形状に構
成されている。That is, the mold 2 (or 3) is provided with a large number of branch runners 13 branching left and right from the vertical runners 12 as the casting plan portion 5, and at the same time, the molten metal is introduced into a large number of cavities 4 to provide a large number of pieces. 2B, the nesting 14 in this case is formed in a rectangular shape in a state of enclosing a part of the vertical runner 12 and a part of the branch runner 13 as shown in FIG. ing.
【００１６】以上のような鋳造金型１において、鋳造方
案部５から高温の溶湯を注湯しても、鋳造方案部５は熱
伝導率の低い入子１０、１４であるためショット時の金
型の最高温度と最低温度の温度差が少なくなり、熱的疲
労が抑制されて耐久性が向上し金型２、３の高寿命化を
図ることが出来る。しかも、湯流れ性も良くなり、湯温
を抑えて低温で注湯することも可能となる。In the casting die 1 as described above, even if a high-temperature molten metal is poured from the casting plan section 5, the casting plan section 5 is the inserts 10 and 14 having a low thermal conductivity, so that it is a metal for shots. The temperature difference between the maximum temperature and the minimum temperature of the mold is reduced, thermal fatigue is suppressed, the durability is improved, and the life of the molds 2 and 3 can be extended. Moreover, the flowability of the hot water is improved, and the hot water temperature can be suppressed and the hot water can be poured at a low temperature.
【００１７】つまり、溶解に要する電力量の低減、湯道
径の縮小による材料歩留り性の向上、押湯効果の向上、
方案部形状の単純化等が図られる。一方、高融点金属材
料の鋳造も可能となる。That is, the amount of electric power required for melting is reduced, the material yield is improved by reducing the diameter of the runner, the effect of the feeder is improved,
The shape of the plan portion can be simplified. On the other hand, it becomes possible to cast a refractory metal material.
【００１８】ここで、入子１０、１４をキャビティ４の
近傍まで臨ませていることから、最後まで湯流れ性が確
保され押湯効果が効果的である。Here, since the inserts 10 and 14 are exposed to the vicinity of the cavity 4, the flowability of the molten metal is ensured to the end and the effect of the feeder is effective.
【００１９】尚、実施例ではいずれも落し込み方案の鋳
造方案部５を示しているが、勿論むくりあげ方案（押上
げ方案）の場合でも可能である。In each of the embodiments, the casting plan portion 5 of the drop-down plan is shown, but of course, it is also possible to use the pulling-up plan (push-up plan).
【００２０】次に、本案の第２構成例について図３及び
図４に基づき説明する。尚、図３は第２の構成例図、図
４は第２の構成例の水平断面図である。Next, a second structural example of the present invention will be described with reference to FIGS. 3 and 4. Note that FIG. 3 is a second configuration example diagram, and FIG. 4 is a horizontal sectional view of the second configuration example.
【００２１】この構成例は、熱伝導率の低い入子１５を
キャビティ４ｂの一部にも臨ませるようにした実施例で
あり、図３に示すように、一対の金型２、３の型合せ面
にそれぞれ入子１５の半体を嵌め込むことの出来る略Ｌ
字型の嵌合凹部１６を形成するとともに、この嵌合凹部
１６の外側と内側にそれぞれキャビティ４ａ、４ｂを形
成している。This structural example is an embodiment in which the insert 15 having a low thermal conductivity is made to face a part of the cavity 4b, and as shown in FIG. 3, a pair of molds 2 and 3 is formed. Approximately L that can fit each half of the insert 15 on the mating surface
A V-shaped fitting recess 16 is formed, and cavities 4a and 4b are formed outside and inside the fitting recess 16, respectively.
【００２２】そして、外側のキャビティ４ａは、図４に
示すように、一対の金型２、３が型合せ状態となって１
つの空間部を形成すべく構成し、内側のキャビティ４ｂ
は入子１５を挟んで金型２、３が型合せした状態で、独
立した別個の空間部を形成するように構成している。As shown in FIG. 4, the outer cavity 4a has a pair of metal molds 2 and 3 in a mold-matching state.
Inner cavity 4b configured to form one space
Is configured to form an independent and separate space portion in a state where the molds 2 and 3 are matched with each other with the insert 15 sandwiched therebetween.
【００２３】そして入子１５は前例の場合と同様にレジ
ン砂を粘結した崩壊性のシェル入子であり、内部に湯口
１７と、湯口底１８から水平に延びる水平湯道１９と、
一方の水平湯道１９端部から延出する枝湯道２０を設
け、この枝湯道２０を前記両キャビティ４ｂ、４ｂに連
通せしめるようにするとともに、水平湯道１９の他端側
をキャビティ４ａに通じる枝湯道２１に連通させるよう
にしている。尚、この枝湯道２１には別個の入子２２を
設けているが、勿論入子１５と一体に形成するようにし
てもよい。The insert 15 is a collapsible shell insert in which resin sand is kneaded, as in the case of the previous example, and has a sprue 17 inside, and a horizontal runner 19 extending horizontally from the spout bottom 18.
A branch runner 20 extending from one end of one horizontal runner 19 is provided so that this branch runner 20 can be communicated with both the cavities 4b and 4b, and the other end of the horizontal runner 19 is connected to the cavity 4a. It is connected to the branch runner 21 leading to. Although the branch runner 21 is provided with a separate insert 22, the insert may be formed integrally with the insert 15.
【００２４】以上のような金型構造にあって、入子１５
を嵌合凹部１６に嵌め込んで型締めすると、３つのキャ
ビティ４ａ、４ｂ、４ｂが画成され、２つのキャビティ
４ｂ、４ｂの型合せ面側には熱伝導率の低い入子１５が
臨むことになる。In the mold structure as described above, the insert 15
When the cavities 4a, 4b, and 4b are defined by fitting the cavities into the fitting concave portions 16 and the dies are clamped, the nest 15 having a low thermal conductivity faces the mating surfaces of the two cavities 4b and 4b. become.
【００２５】こうした金型構造において、湯口１７から
溶湯を注湯すると、溶湯は水平湯道１９からそれぞれの
キャビティ４ａ、４ｂ、４ｂに充填され、この際、熱伝
導性の低い入子１５によって鋳造方案部５内の溶湯の湯
流れ性が確保される訳であるが、キャビティ４ｂ、４ｂ
の一部にも臨んでいるため、同キャビティ４ｂ内の湯廻
り性を向上させることも出来る。このため、特にキャビ
ティ４ｂの形状が複雑で押湯効果を上げたいような時に
効果的であり、引け巣等の防止を図ることが出来る。In such a mold structure, when the molten metal is poured from the sprue 17, the molten metal is filled into the respective cavities 4a, 4b, 4b from the horizontal runner 19, and at this time, the casting is performed by the insert 15 having a low thermal conductivity. The flowability of the molten metal in the plan portion 5 is ensured, but the cavities 4b, 4b
Since it also faces a part of the above, it is possible to improve the hot water swirling property in the cavity 4b. Therefore, it is particularly effective when the shape of the cavity 4b is complicated and it is desired to improve the feeder effect, and it is possible to prevent shrinkage cavities and the like.
【００２６】そして、凝固が完了したら型開きして入子
１５を崩壊させ、製品を取り出す。When the solidification is completed, the mold is opened to collapse the insert 15, and the product is taken out.
【００２７】尚、このように入子１５によって各金型
２、３のキャビティ４ｂ、４ｂを分離して独立に画成す
るようにすれば、従来の鋳造金型のスペースでありなが
ら倍の数の製品を同時に鋳造することが出来る。If the cavities 4b, 4b of the respective molds 2, 3 are separated and independently defined by the inserts 15 as described above, the space is double that of a conventional casting mold. Products can be cast at the same time.
【００２８】以上のような実施例において、入子１０、
１４、１５は必ずしもシェル入子である必要はなく金型
母材より熱伝導性の低い部材であれば良いが、構成例２
の場合は崩壊性の入子であることが必要である。In the above embodiment, the nest 10,
The members 14 and 15 do not necessarily have to be shell inserts and may be members having a lower thermal conductivity than the mold base material.
In the case of, it is necessary to be a collapsible nest.
【００２９】[0029]
【発明の効果】以上のように本発明の金型鋳造法は、鋳
造方案部を金型母材より熱伝導率の低い部材で構成した
ため、同部の湯流れ性が向上し、また方案部の熱的疲労
に対する耐久性が向上して金型の寿命が延びる。また、
方案部における湯温低下が抑えられるため低温で注湯す
ることが可能になり、溶湯の溶解に要する電力量の低減
化、湯道等の小径化による材料の歩留り性向上が可能で
ある。更に鋳鋼等の高融点材料の金型鋳造が可能にな
り、また押湯効果が高まって複雑な形状の鋳造品の成形
出来、方案部形状が単純化されて金型製作コストを低減
出来る等の効果を奏する。As described above, in the die casting method of the present invention, the casting plan portion is composed of a member having a lower thermal conductivity than the die base material, so that the flowability of the portion is improved and the plan portion is also improved. The durability to the thermal fatigue of the mold is improved and the life of the mold is extended. Also,
Since lowering of the hot water temperature in the design section can be suppressed, it becomes possible to pour the molten metal at a low temperature, the amount of electric power required for melting the molten metal can be reduced, and the yield of the material can be improved by reducing the diameter of the runner and the like. In addition, it becomes possible to perform die casting of high melting point materials such as cast steel, and the effect of riser can be improved to form castings with complicated shapes, and the shape of the plan portion can be simplified to reduce die manufacturing costs. Produce an effect.
【図１】本発明に係る金型の第１の構成例図FIG. 1 is a first configuration example diagram of a mold according to the present invention.
【図２】第１の構成例の別実施例図FIG. 2 is a diagram of another embodiment of the first configuration example.
【図３】本発明に係る金型の第２の構成例図FIG. 3 is a second configuration example diagram of a mold according to the present invention.
【図４】第２の構成例の水平断面図FIG. 4 is a horizontal sectional view of a second configuration example.
２、３ 金型 ４ キャビティ ５ 鋳造方案部 １０、１４、１５ 入子 2, 3 Mold 4 Cavity 5 Casting plan 10, 14, 15 Nest
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小玉 春喜 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 畑中 節美 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Haruki Kodama 1-10 Shinshinayama, Sayama-shi, Saitama 1 Inside Honda Engineering Co., Ltd. (72) Setsumi Hatanaka 1-10-1 Shinsayama, Sayama, Saitama Within Honda Engineering Co., Ltd.
Claims (3)
率の低い部材で構成して鋳造することを特徴とする金型
鋳造法。1. A mold casting method, characterized in that the mold part of the mold is made of a material having a lower thermal conductivity than that of the base material of the mold and is cast.
熱伝導率の低い部材で構成されることを特徴とする請求
項１に記載の金型鋳造法。2. The mold casting method according to claim 1, wherein a part having a low thermal conductivity is formed up to the vicinity of the cavity of the casting plan portion.
一部にも臨ませて鋳造することを特徴とする請求項１に
記載の金型鋳造法。3. The mold casting method according to claim 1, wherein the member having a low thermal conductivity is cast so as to face a part of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5212441A JPH0760398A (en) | 1993-08-27 | 1993-08-27 | Die casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5212441A JPH0760398A (en) | 1993-08-27 | 1993-08-27 | Die casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0760398A true JPH0760398A (en) | 1995-03-07 |
Family
ID=16622666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5212441A Withdrawn JPH0760398A (en) | 1993-08-27 | 1993-08-27 | Die casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760398A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2628556A4 (en) * | 2010-10-13 | 2018-01-03 | Mitsubishi Heavy Industries, Ltd. | Die-casting die |
| CN114082892A (en) * | 2020-08-24 | 2022-02-25 | 本田技研工业株式会社 | Casting die |
| CN114082893A (en) * | 2020-08-24 | 2022-02-25 | 本田技研工业株式会社 | Casting die |
| JP2022036645A (en) * | 2020-08-24 | 2022-03-08 | 本田技研工業株式会社 | Liner fitting device |
-
1993
- 1993-08-27 JP JP5212441A patent/JPH0760398A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2628556A4 (en) * | 2010-10-13 | 2018-01-03 | Mitsubishi Heavy Industries, Ltd. | Die-casting die |
| CN114082892A (en) * | 2020-08-24 | 2022-02-25 | 本田技研工业株式会社 | Casting die |
| CN114082893A (en) * | 2020-08-24 | 2022-02-25 | 本田技研工业株式会社 | Casting die |
| JP2022036639A (en) * | 2020-08-24 | 2022-03-08 | 本田技研工業株式会社 | Mold for casting |
| JP2022036634A (en) * | 2020-08-24 | 2022-03-08 | 本田技研工業株式会社 | Mold for casting |
| JP2022036645A (en) * | 2020-08-24 | 2022-03-08 | 本田技研工業株式会社 | Liner fitting device |
| US11453046B2 (en) | 2020-08-24 | 2022-09-27 | Honda Motor Co., Ltd. | Casting mold |
| US11458531B2 (en) | 2020-08-24 | 2022-10-04 | Honda Motor Co., Ltd. | Casting mold |
| CN114082892B (en) * | 2020-08-24 | 2024-03-01 | 本田技研工业株式会社 | Casting mold |
| CN114082893B (en) * | 2020-08-24 | 2024-04-26 | 本田技研工业株式会社 | Casting mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001031 |